Merge branch 'obsd-master'

or used to be configured. GitHub issue 4498.

.github/CONTRIBUTING.md

@@ -29,7 +29,7 @@ uname -sp && tmux -V && echo $TERM
 
 Also include:
 
-- Your platform (Linux, OS X, or whatever).
+- Your platform (Linux, macOS, or whatever).
 
 - A brief description of the problem with steps to reproduce.
 
@@ -37,7 +37,8 @@ Also include:
 
 - Your terminal, and `$TERM` inside and outside of tmux.
 
-- Logs from tmux (see below).
+- Logs from tmux (see below). Please attach logs to the issue directly rather
+  than using a download site or pastebin. Put in a zip file if necessary.
 
 - At most one or two screenshots, if helpful.
 
@@ -76,3 +77,8 @@ The log files are:
 - `tmux-out*.log`: output log file.
 
 Please attach the log files to your issue.
+
+## What does it mean if an issue is closed?
+
+All it means is that work on the issue is not planned for the near future. See
+the issue's comments to find out if contributions would be welcome.

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1 @@
+blank_issues_enabled: false

.github/ISSUE_TEMPLATE/use-this-issue-template.md

@@ -1,3 +1,12 @@
+---
+name: Use this issue template
+about: Please read https://github.com/tmux/tmux/blob/master/.github/CONTRIBUTING.md
+title: ''
+labels: ''
+assignees: ''
+
+---
+
 ### Issue description
 
 Please read https://github.com/tmux/tmux/blob/master/.github/CONTRIBUTING.md

.github/README.md

@@ -4,7 +4,7 @@ tmux is a terminal multiplexer: it enables a number of terminals to be created,
 accessed, and controlled from a single screen. tmux may be detached from a
 screen and continue running in the background, then later reattached.
 
-This release runs on OpenBSD, FreeBSD, NetBSD, Linux, OS X and Solaris.
+This release runs on OpenBSD, FreeBSD, NetBSD, Linux, macOS and Solaris.
 
 ## Dependencies
 
@@ -79,7 +79,7 @@ A small example configuration is in `example_tmux.conf`.
 
 And a bash(1) completion file at:
 
-https://github.com/imomaliev/tmux-bash-completion
+https://github.com/scop/bash-completion/blob/main/completions/tmux
 
 For debugging, run tmux with `-v` or `-vv` to generate server and client log
 files in the current directory.

.github/lock.yml

@@ -1,10 +0,0 @@
-daysUntilLock: 30
-skipCreatedBefore: false
-exemptLabels: []
-lockLabel: false
-lockComment: >
-  This thread has been automatically locked since there has not been
-  any recent activity after it was closed. Please open a new issue for
-  related bugs.
-setLockReason: false
-#only: issues

.github/workflows/lock.yml

@@ -0,0 +1,34 @@
+name: 'Lock Threads'
+
+on:
+  schedule:
+    - cron: '0 0 * * *'
+  workflow_dispatch:
+
+permissions:
+  issues: write
+  pull-requests: write
+  discussions: write
+
+concurrency:
+  group: lock-threads
+
+jobs:
+  action:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: dessant/lock-threads@v5
+        with:
+          github-token: ${{ github.token }}
+          issue-inactive-days: '30'
+          issue-comment: >
+            This issue has been automatically locked since there
+            has not been any recent activity after it was closed.
+          pr-inactive-days: '60'
+          pr-comment: >
+            This pull request has been automatically locked since there
+            has not been any recent activity after it was closed.
+          discussion-inactive-days: '60'
+          discussion-comment: >
+            This discussion has been automatically locked since there
+            has not been any recent activity after it was closed.

.gitignore

@@ -1,23 +1,24 @@
-*.o
-*~
-*.diff
-*.patch
 *.core
-core
-tags
+*.dSYM
+*.diff
+*.o
+*.patch
+*.swp
+*~
 .deps/
-compat/.dirstamp
-aclocal.m4
-autom4te.cache/
-config.log
-config.status
-etc/
-tmux
+.dirstamp
 Makefile
 Makefile.in
-configure
-tmux.1.*
-*.dSYM
+aclocal.m4
+autom4te.cache/
 cmd-parse.c
+compat/.dirstamp
+config.log
+config.status
+configure
+core
+etc/
 fuzz/*-fuzzer
-.dirstamp
+tags
+tmux
+tmux.1.*

CHANGES

@@ -1,3 +1,396 @@
+CHANGES FROM 3.4 TO 3.5
+
+* Revamp extended keys support to more closely match xterm and support mode 2
+  as well as mode 1. This is a substantial change to key handling which changes
+  tmux to always request mode 2 from parent terminal, changes to an unambiguous
+  internal representation of keys, and adds an option (extended-keys-format) to
+  control the format similar to the xterm(1) formatOtherKeys resource.
+
+* Clear an overlay (popup or menu) when command prompt is entered.
+
+* Add copy-mode -d flag to scroll a page down if in copy mode already (matching
+  -e).
+
+* Display hyperlinks in copy mode and add copy_cursor_hyperlink format to get
+  the hyperlink under the cursor.
+
+* Add a prefix timeout option.
+
+* Mouse move keys are not useful as key bindings because we do not turn them on
+  unless the application requests them. Ignore them so they do not cause the
+  prefix to be canceled
+
+* Add search_count and search_count_partial formats in copy mode.
+
+* Do not reset mouse pane if clicked on status line,
+
+* Add mirrored versions of the main-horizontal and main-vertical layouts where
+  the main pane is bottom or right instead of top or left.
+
+* Allow REP to work with Unicode characters.
+
+* Fix size calculation of terminators for clipboard escape sequences.
+
+* Treat CRLF as LF in config files where it is easy to do so.
+
+* The Linux console has some bugs with bright colours, so add some workarounds
+  for it.
+
+* If built with systemd, remove some environment variables it uses.
+
+* Adjust the logic when deleting last buffer to better preserve the selection:
+  if selecting the element below the deleted one fails (because as the last
+  one), select the one above it instead.
+
+* Add --enable-jemalloc to build with jemalloc memory allocator (since glibc
+  malloc is so poor).
+
+* Add a way (refresh-client -r) for control mode clients to provide OSC 10 and
+  11 responses to tmux so they can set the default foreground and background
+  colours.
+
+* Add N to search backwards in tree modes.
+
+* Use default-shell for command prompt, #() and popups.
+
+* Revert part of a change intended to improve search performance by skipping
+  parts of lines already searched, but which in fact skipped the ends of lines
+  altogether.
+
+* Add a command-error hook when a command fails.
+
+* Add an option allow-set-title to forbid applications from changing the pane
+  title.
+
+* Correct handling of mouse up events (don't ignore all but the last released
+  button), and always process down event for double click.
+
+* Fix a crash if focusing a pane that is exiting.
+
+* Pick newest session (as documented) when looking for next session for
+  detach-on-destroy.
+
+* Reduce default escape-time to 10 milliseconds.
+
+* Add display-menu -M to always turn mouse on in a menu.
+
+* Look for feature code 21 for DECSLRM and 28 for DECFRA in the device
+  attributes and also accept level 1.
+
+* Fix crash if built with SIXEL and the SIXEL colour register is invalid; also
+  remove SIXEL images before reflow.
+
+* Do not notify window-layout-changed if the window is about to be destroyed.
+
+* Do not consider a selection present if it is empty for the selection_active
+  and selection_present format variables.
+
+* Fix split-window -p.
+
+CHANGES FROM 3.3a TO 3.4
+
+* Add options keep-last and keep-group to destroy-unattached to keep the last
+  session whether in a group.
+
+* Don't allow paste-buffer into dead panes.
+
+* Add -t to source-file.
+
+* Rewrite combined character handling to be more consistent and to support
+  newer Unicode combined characters.
+
+* Add basic support for SIXEL if built with --enable-sixel.
+
+* Add a session, pane and user mouse range types for the status line and add
+  format variables for mouse_status_line and mouse_status_range so they can be
+  associated with different commands in the key bindings.
+
+* Add flag (-o) to next-prompt/previous-prompt to go to OSC 133 command output.
+
+* Add options and flags for menu styles (menu-style, menu-border-style) similar
+  to those existing for popups.
+
+* Add support for marking lines with a shell prompt based on the OSC 133 extension.
+
+* Check for libterminfo for NetBSD.
+
+* Add "us" to styles for underscore colour.
+
+* Add flags (-c and -y) to change the confirm key and default behaviour of
+  confirm-before.
+
+* Use ncurses' new tparm_s function (added in 6.4-20230424) instead of tparm so
+  it does not object to string arguments in c apabilities it doesn't already
+  know. Also ignore errors from tparm if using previous ncurses versions.
+
+* Set default lock command to vlock on Linux if present at build time.
+
+* Discard mouse sequences that have the right form but actually are invalid.
+
+* Add support for spawning panes in separate cgroups with systemd and a
+  configure flag (--disable-cgroups) to turn off.
+
+* Add a format (pane_unseen_changes) to show if there are unseen changes while
+  in a mode.
+
+* Remove old buffer when renaming rather than complaining.
+
+* Add an L modifier like P, W, S to loop over clients.
+
+* Add -f to list-clients like the other list commands.
+
+* Extend display-message to work for control clients.
+
+* Add a flag to display-menu to select the manu item selected when the menu is
+  open.
+
+* Have tmux recognise pasted text wrapped in bracket paste sequences, rather
+  than only forwarding them to the program inside.
+
+* Have client return 1 if process is interrupted to an input pane.
+
+* Query the client terminal for foreground and background colours and if OSC 10
+  or 11 is received but no colour has been set inside tmux, return the colour
+  from the first attached client.
+
+* Add send-keys -K to handle keys directly as if typed (so look up in key
+  table).
+
+* Process escape sequences in show-buffer.
+
+* Add a -l flag to display-message to disable format expansion.
+
+* Add paste-buffer-deleted notification and fix name of paste-buffer-changed.
+
+* Do not attempt to connect to the socket as a client if systemd is active.
+
+* Add scroll-top and scroll-bottom commands to scroll so cursor is at top or
+  bottom.
+
+* Add a -T flag to capture-pane to stop at the last used cell instead of the
+  full width. Restore the previous behaviour by making it default to off unless
+  -J is used.
+
+* Add message-line option to control where message and prompt go.
+
+* Notification when a paste buffer is deleted.
+
+* Add a Nobr terminfo(5) capability to tell tmux the terminal does not use bright
+  colours for bold.
+
+* Change g and G to go to top and bottom in menus.
+
+* Add a third state "all" to allow-passthrough to work even in invisible panes.
+
+* Add support for OSC 8 hyperlinks.
+
+* Store the time lines are scrolled into history and display in copy mode.
+
+* Add a %config-error reply to control mode for configuration file errors since
+  reporting them in view mode is useless.
+
+* A new feature flag (ignorefkeys) to ignore terminfo(5) function key
+  definitions for rxvt.
+
+* Pass through first argument to OSC 52 (which clipboards to set) if the
+  application provides it.
+
+* Expand arguments to send-keys, capture-pane, split-window, join-pane where it
+  makes sense to do so.
+
+* Ignore named buffers when choosing a buffer if one is not specified by the user.
+
+CHANGES FROM 3.3 TO 3.3a
+
+* Do not crash when run-shell produces output from a config file.
+
+* Do not unintentionally turn off all mouse mode when button mode is also
+  present.
+
+CHANGES FROM 3.2a TO 3.3
+
+* Add an ACL list for users connecting to the tmux socket. Users may be
+  forbidden from attaching, forced to attach read-only, or allowed to attach
+  read-write. A new command, server-access, configures the list. File system
+  permissions must still be configured manually.
+
+* Emit window-layout-changed on swap-pane.
+
+* Better error reporting when applying custom layouts.
+
+* Handle ANSI escape sequences in run-shell output.
+
+* Add pane_start_path to match start_command.
+
+* Set PWD so shells have a hint about the real path.
+
+* Do not allow pipe-pane on dead panes.
+
+* Do not report mouse positions (incorrectly) above the maximum of 223 in
+  normal mouse mode.
+
+* Add an option (default off) to control the passthrough escape sequence.
+
+* Support more mouse buttons when the terminal sends them.
+
+* Add a window-resized hook which is fired when the window is actually resized
+  which may be later than the client resize.
+
+* Add next_session_id format with the next session ID.
+
+* Add formats for client and server UID and user.
+
+* Add argument to refresh-client -l to forward clipboard to a pane.
+
+* Add remain-on-exit-format to set text shown when pane is dead.
+
+* With split-window -f use percentages of window size not pane size.
+
+* Add an option (fill-character) to set the character used for unused areas of
+  a client.
+
+* Add an option (scroll-on-clear) to control if tmux scrolls into history on
+  clear.
+
+* Add a capability for OSC 7 and use it similarly to how the title is set (and
+  controlled by the same set-titles option).
+
+* Add support for systemd socket activation (where systemd creates the Unix
+  domain socket for tmux rather than tmux creating it). Build with
+  --enable-systemd.
+
+* Add an option (pane-border-indicators) to select how the active pane is shown
+  on the pane border (colour, arrows or both).
+
+* Support underscore styles with capture-pane -e.
+
+* Make pane-border-format a pane option rather than window.
+
+* Respond to OSC 4 queries
+
+* Fix g/G keys in modes to do the same thing as copy mode (and vi).
+
+* Bump the time terminals have to respond to device attributes queries to three
+  seconds.
+
+* If automatic-rename is off, allow the rename escape sequence to set an empty
+  name.
+
+* Trim menu item text more intelligently.
+
+* Add cursor-style and cursor-colour options to set the default cursor style
+  and colour.
+
+* Accept some useful and non-conflicting emacs keys in vi normal mode at the
+  command prompt.
+
+* Add a format modifier (c) to force a colour to RGB.
+
+* Add -s and -S to display-popup to set styles, -b to set lines and -T to set
+  popup title. New popup-border-lines, popup-border-style and popup-style
+  options set the defaults.
+
+* Add -e flag to set an environment variable for a popup.
+
+* Make send-keys without arguments send the key it is bound to (if bound to a
+  key).
+
+* Try to leave terminal cursor at the right position even when tmux is drawing
+  its own cursor or selection (such as at the command prompt and in choose
+  mode) for people using screen readers and similar which can make use of it.
+
+* Change so that {} is converted to tmux commands immediately when parsed. This
+  means it must contain valid tmux commands. For commands which expand %% and
+  %%%, this now only happens within string arguments. Use of nested aliases
+  inside {} is now forbidden. Processing of commands given in quotes remains
+  the same.
+
+* Disable evports on SunOS since they are broken.
+
+* Do not expand the file given with tmux -f so it can contain :s.
+
+* Bump FORMAT_LOOP_LIMIT and add a log message when hit.
+
+* Add a terminal feature for the mouse (since FreeBSD termcap does not have kmous).
+
+* Forbid empty session names.
+
+* Improve error reporting when the tmux /tmp directory cannot be created or
+  used.
+
+* Give #() commands a one second grace period where the output is empty before
+  telling the user they aren't doing anything ("not ready").
+
+* When building, pick default-terminal from the first of tmux-256color, tmux,
+  screen-256color, screen that is available on the build system (--with-TERM
+  can override).
+
+* Do not close popups on resize, instead adjust them to fit.
+
+* Add a client-active hook.
+
+* Make window-linked and window-unlinked window options.
+
+* Do not configure on macOS without the user making a choice about utf8proc
+  (either --enable-utf8proc or --disable-utf8proc).
+
+* Do not freeze output in panes when a popup is open, let them continue to
+  redraw.
+
+* Add pipe variants of the line copy commands.
+
+* Change copy-line and copy-end-of-line not to cancel and add -and-cancel
+  variants, like the other copy commands.
+
+* Support the OSC palette-setting sequences in popups.
+
+* Add a pane-colours array option to specify the defaults palette.
+
+* Add support for Unicode zero-width joiner.
+
+* Make newline a style delimiter as well so they can cross multiple lines for
+  readability in configuration files.
+
+* Change focus to be driven by events rather than scanning panes so the
+  ordering of in and out is consistent.
+
+* Add display-popup -B to open a popup without a border.
+
+* Add a menu for popups that can be opened with button three outside the popup
+  or on the left or top border. Resizing now only works on the right and bottom
+  borders or when using Meta. The menu allows a popup to be closed, expanded to
+  the full size of the client, centered in the client or changed into a pane.
+
+* Make command-prompt and confirm-before block by default (like run-shell). A
+  new -b flags runs them in the background as before. Also set return code for
+  confirm-before.
+
+* Change cursor style handling so tmux understands which sequences contain
+  blinking and sets the flag appropriately, means that it works whether cnorm
+  disables blinking or not. This now matches xterm's behaviour.
+
+* More accurate vi(1) word navigation in copy mode and on the status line. This
+  changes the meaning of the word-separators option: setting it to the empty
+  string is equivalent to the previous behavior.
+
+* Add -F for command-prompt and use it to fix "Rename" on the window menu.
+
+* Add different command histories for different types of prompts ("command",
+  "search" etc).
+
+CHANGES FROM 3.2 TO 3.2a
+
+* Add an "always" value for the "extended-keys" option; if set then tmux will
+  forward extended keys to applications even if they do not request them.
+
+* Add a "mouse" terminal feature so tmux can enable the mouse on terminals
+  where it is known to be supported even if terminfo(5) says otherwise.
+
+* Do not expand the filename given to -f so it can contain colons.
+
+* Fixes for problems with extended keys and modifiers, scroll region,
+  source-file, cross compiling, format modifiers and other minor issues.
+
 CHANGES FROM 3.1c TO 3.2
 
 * Add a flag to disable keys to close a message.
@@ -29,7 +422,7 @@ CHANGES FROM 3.1c TO 3.2
 * Add a -S flag to new-window to make it select the existing window if one
   with the given name already exists rather than failing with an error.
 
-* Addd a format modifier to check if a window or session name exists (N/w or
+* Add a format modifier to check if a window or session name exists (N/w or
   N/s).
 
 * Add compat clock_gettime for older macOS.
@@ -61,7 +454,7 @@ CHANGES FROM 3.1c TO 3.2
   an option on all panes.
 
 * Make replacement of ##s consistent when drawing formats, whether followed by
-  [ or not. Add a flag (e) to the q: format modifier to double up #s
+  [ or not. Add a flag (e) to the q: format modifier to double up #s.
 
 * Add -N flag to display-panes to ignore keys.
 
@@ -105,7 +498,7 @@ CHANGES FROM 3.1c TO 3.2
 
 * Add a way for control mode clients to subscribe to a format and be notified
   of changes rather than having to poll.
-    
+
 * Add some formats for search in copy mode (search_present, search_match).
 
 * Do not wait on shutdown for commands started with run -b.
@@ -229,7 +622,7 @@ CHANGES FROM 3.1c TO 3.2
   only show windows and C-b . only targets.
 
 * Change all the style options to string options so they can support formats.
-  Change pane-border-active-style to use this to change the border colour when
+  Change pane-active-border-style to use this to change the border colour when
   in a mode or with synchronize-panes on. This also implies a few minor changes
   to existing behaviour:
 
@@ -265,7 +658,7 @@ CHANGES FROM 3.1c TO 3.2
 
 * Wait until the initial command sequence is done before sending a device
   attributes request and other bits that prompt a reply from the terminal. This
-  means that stray relies are not left on the terminal if the command has
+  means that stray replies are not left on the terminal if the command has
   attached and then immediately detached and tmux will not be around to receive
   them.
 
@@ -280,7 +673,7 @@ CHANGES FROM 3.1c TO 3.2
   window-renamed
   window-unlinked
 
-  And these now pane options:
+  And these are now pane options:
 
   pane-died
   pane-exited
@@ -355,7 +748,7 @@ CHANGES FROM 3.1c TO 3.2
 * Add a default binding for button 2 to paste.
 
 * Add -d flag to run-shell to delay before running the command and allow it to
-  run without a command so it just delays.
+  be used without a command so it just delays.
 
 * Add C-g to cancel command prompt with vi keys as well as emacs, and q in
   command mode.
@@ -1111,7 +1504,7 @@ Incompatible Changes
 
     bind -Tcopy-mode C-r command-prompt -i -p'search up' "send -X search-backward-incremental '%%'"
 
-  There are also some new commmands available with send -X, such as
+  There are also some new commands available with send -X, such as
   copy-pipe-and-cancel.
 * set-remain-on-exit has gone -- can be achieved with hooks instead.
 * Hooks: before hooks have been removed and only a selection of commands now
@@ -3087,7 +3480,7 @@ The list of older changes is below.
 * (nicm) -n on new-session is now -s, and -n is now the initial window name.
   This was documented but not implemented :-/.
 * (nicm) kill-window command, bound to & by default (because it should be hard
-  to hit accidently).
+  to hit accidentally).
 * (nicm) bell-style option with three choices: "none" completely ignore bell;
   "any" pass through a bell in any window to current; "current" ignore bells
   except in current window. This applies only to the bell terminal signal,

Makefile.am

@@ -1,5 +1,3 @@
-# Makefile.am
-
 # Obvious program stuff.
 bin_PROGRAMS = tmux
 CLEANFILES = tmux.1.mdoc tmux.1.man cmd-parse.c
@@ -13,7 +11,9 @@ dist_EXTRA_tmux_SOURCES = compat/*.[ch]
 # Preprocessor flags.
 AM_CPPFLAGS += @XOPEN_DEFINES@ \
 	-DTMUX_VERSION='"@VERSION@"' \
-	-DTMUX_CONF='"$(sysconfdir)/tmux.conf:~/.tmux.conf:$$XDG_CONFIG_HOME/tmux/tmux.conf:~/.config/tmux/tmux.conf"'
+	-DTMUX_CONF='"$(sysconfdir)/tmux.conf:~/.tmux.conf:$$XDG_CONFIG_HOME/tmux/tmux.conf:~/.config/tmux/tmux.conf"' \
+	-DTMUX_LOCK_CMD='"@DEFAULT_LOCK_CMD@"' \
+	-DTMUX_TERM='"@DEFAULT_TERM@"'
 
 # Additional object files.
 LDADD = $(LIBOBJS)
@@ -29,6 +29,9 @@ AM_CFLAGS += -Wwrite-strings -Wshadow -Wpointer-arith -Wsign-compare
 AM_CFLAGS += -Wundef -Wbad-function-cast -Winline -Wcast-align
 AM_CFLAGS += -Wdeclaration-after-statement -Wno-pointer-sign -Wno-attributes
 AM_CFLAGS += -Wno-unused-result -Wno-format-y2k
+if IS_DARWIN
+AM_CFLAGS += -Wno-deprecated-declarations -Wno-cast-align -Wno-macro-redefined
+endif
 AM_CPPFLAGS += -DDEBUG
 endif
 AM_CPPFLAGS += -iquote.
@@ -63,6 +66,11 @@ if IS_HAIKU
 AM_CPPFLAGS += -D_BSD_SOURCE
 endif
 
+# Set flags for Cygwin.
+if IS_CYGWIN
+AM_CPPFLAGS += -DTMUX_SOCK_PERM=0
+endif
+
 # List of sources.
 dist_tmux_SOURCES = \
 	alerts.c \
@@ -119,12 +127,14 @@ dist_tmux_SOURCES = \
 	cmd-select-pane.c \
 	cmd-select-window.c \
 	cmd-send-keys.c \
+	cmd-server-access.c \
 	cmd-set-buffer.c \
 	cmd-set-environment.c \
 	cmd-set-option.c \
 	cmd-show-environment.c \
 	cmd-show-messages.c \
 	cmd-show-options.c \
+	cmd-show-prompt-history.c \
 	cmd-source-file.c \
 	cmd-split-window.c \
 	cmd-swap-pane.c \
@@ -144,6 +154,7 @@ dist_tmux_SOURCES = \
 	grid-reader.c \
 	grid-view.c \
 	grid.c \
+	hyperlinks.c \
 	input-keys.c \
 	input.c \
 	job.c \
@@ -167,6 +178,7 @@ dist_tmux_SOURCES = \
 	screen-redraw.c \
 	screen-write.c \
 	screen.c \
+	server-acl.c \
 	server-client.c \
 	server-fn.c \
 	server.c \
@@ -176,11 +188,13 @@ dist_tmux_SOURCES = \
 	style.c \
 	tmux.c \
 	tmux.h \
+	tmux-protocol.h \
 	tty-acs.c \
 	tty-features.c \
 	tty-keys.c \
 	tty-term.c \
 	tty.c \
+	utf8-combined.c \
 	utf8.c \
 	window-buffer.c \
 	window-client.c \
@@ -198,11 +212,21 @@ if NEED_FORKPTY
 nodist_tmux_SOURCES += compat/forkpty-@PLATFORM@.c
 endif
 
+# Add compat file for systemd.
+if HAVE_SYSTEMD
+nodist_tmux_SOURCES += compat/systemd.c
+endif
+
 # Add compat file for utf8proc.
 if HAVE_UTF8PROC
 nodist_tmux_SOURCES += compat/utf8proc.c
 endif
 
+# Enable sixel support.
+if ENABLE_SIXEL
+dist_tmux_SOURCES += image.c image-sixel.c
+endif
+
 if NEED_FUZZING
 check_PROGRAMS = fuzz/input-fuzzer
 fuzz_input_fuzzer_LDFLAGS = $(FUZZING_LIBS)

README

@@ -4,7 +4,7 @@ tmux is a terminal multiplexer: it enables a number of terminals to be created,
 accessed, and controlled from a single screen. tmux may be detached from a
 screen and continue running in the background, then later reattached.
 
-This release runs on OpenBSD, FreeBSD, NetBSD, Linux, OS X and Solaris.
+This release runs on OpenBSD, FreeBSD, NetBSD, Linux, macOS and Solaris.
 
 * Dependencies
 
@@ -36,6 +36,7 @@ autoconf, automake and pkg-config:
 	$ cd tmux
 	$ sh autogen.sh
 	$ ./configure && make
+	$ sudo make install
 
 * Contributing
 
@@ -55,9 +56,17 @@ source tree with:
 
 A small example configuration is in example_tmux.conf.
 
+Other documentation is available in the wiki:
+
+	https://github.com/tmux/tmux/wiki
+
+Also see the tmux FAQ at:
+
+	https://github.com/tmux/tmux/wiki/FAQ
+
 A bash(1) completion file is at:
 
-	https://github.com/imomaliev/tmux-bash-completion
+	https://github.com/scop/bash-completion/blob/main/completions/tmux
 
 For debugging, run tmux with -v and -vv to generate server and client log files
 in the current directory.

README.ja

@@ -3,7 +3,7 @@ tmuxへようこそ!
 tmuxはターミナルマルチプレクサーです。複数のターミナルを一つのスクリーン内に作成し、操作することができます。
 バックグラウンドで処理を実行中に一度スクリーンから離れて後から復帰することも可能です。
 
-OpenBSD、FreeBSD、NetBSD、Linux、OS X、Solarisで実行できます。
+OpenBSD、FreeBSD、NetBSD、Linux、macOS、Solarisで実行できます。
 
 tmuxはlibevent 2.x.に依存します。 下記からダウンロードしてください。
 
@@ -38,7 +38,7 @@ tmuxのドキュメントについてはtmux.1マニュアルをご覧くださ
 サンプル設定は本リポジトリのexample_tmux.confに
 また、bash-completionファイルは下記にあります。
 
-	https://github.com/imomaliev/tmux-bash-completion
+	https://github.com/scop/bash-completion/blob/main/completions/tmux
 
 「-v」や「-vv」を指定することでデバッグモードでの起動が可能です。カレントディレクトリにサーバーやクライアントのログファイルが生成されます。
 

SYNCING

@@ -1,17 +1,17 @@
 Preamble
 ========
 
-Tmux portable relies on  repositories "tmux" and "tmux-openbsd".
+Tmux portable relies on  repositories "tmux" and "tmux-obsd".
 Here's a description of them:
 
 * "tmux" is the portable version, the one which contains code for other
   operating systems, and autotools, etc., which isn't found or needed in the
   OpenBSD base system.
 
-* "tmux-openbsd" is the version of tmux in OpenBSD base system which provides
+* "tmux-obsd" is the version of tmux in OpenBSD base system which provides
   the basis of the portable tmux version.
 
-Note:  The "tmux-openbsd" repository is actually handled by "git cvsimport"
+Note:  The "tmux-obsd" repository is actually handled by "git cvsimport"
 running at 15 minute intervals, so a commit made to OpenBSD's tmux CVS
 repository will take at least that long to appear in this git repository.
 (It might take longer, depending on the CVS mirror used to import the
@@ -34,11 +34,11 @@ this information has ever been set before.
 Cloning repositories
 ====================
 
-This involves having both tmux and tmux-openbsd cloned, as in:
+This involves having both tmux and tmux-obsd cloned, as in:
 
 % cd /some/where/useful
 % git clone https://github.com/tmux/tmux.git
-% git clone https://github.com/ThomasAdam/tmux-openbsd.git
+% git clone https://github.com/ThomasAdam/tmux-obsd.git
 
 Note that you do not need additional checkouts to manage the sync -- an
 existing clone of either repositories will suffice.  So if you already have
@@ -47,30 +47,30 @@ these checkouts existing, skip that.
 Adding in git-remotes
 =====================
 
-Because the portable "tmux" git repository and the "tmux-openbsd"
+Because the portable "tmux" git repository and the "tmux-obsd"
 repository do not inherently share any history between each other, the
 history has been faked between them.  This "faking of history" is something
 which has to be told to git for the purposes of comparing the "tmux" and
-"tmux-openbsd" repositories for syncing.  To do this, we must reference the
-clone of the "tmux-openbsd" repository from the "tmux" repository, as
+"tmux-obsd" repositories for syncing.  To do this, we must reference the
+clone of the "tmux-obsd" repository from the "tmux" repository, as
 shown by the following command:
 
 % cd /path/to/tmux
-% git remote add obsd-tmux file:///path/to/tmux-openbsd
+% git remote add obsd-tmux file:///path/to/tmux-obsd
 
 So that now, the remote "obsd-tmux" can be used to reference branches and
-commits from the "tmux-openbsd" repository, but from the context of the
+commits from the "tmux-obsd" repository, but from the context of the
 portable "tmux" repository, which makes sense because it's the "tmux"
 repository which will have the updates applied to them.
 
 Fetching updates
 ================
 
-To ensure the latest commits from "tmux-openbsd" can be found from within
-"tmux", we have to ensure the "master" branch from "tmux-openbsd" is
+To ensure the latest commits from "tmux-obsd" can be found from within
+"tmux", we have to ensure the "master" branch from "tmux-obsd" is
 up-to-date first, and then reference that update in "tmux", as in:
 
-% cd /path/to/tmux-openbsd
+% cd /path/to/tmux-obsd
 % git checkout master
 % git pull
 
@@ -82,17 +82,17 @@ Then back in "tmux":
 Creating the necessary branches
 ===============================
 
-Now that "tmux" can see commits and branches from "tmux-openbsd" by way
+Now that "tmux" can see commits and branches from "tmux-obsd" by way
 of the remote name "obsd-tmux", we can now create the master branch from
-"tmux-openbsd" in the "tmux" repository:
+"tmux-obsd" in the "tmux" repository:
 
 % git checkout -b obsd-master obsd-tmux/master
 
 Adding in the fake history points
-================================= 
+=================================
 
 To tie both the "master" branch from "tmux" and the "obsd-master"
-branch from "tmux-openbsd" together, the fake history points added to the
+branch from "tmux-obsd" together, the fake history points added to the
 "tmux" repository need to be added.  To do this, we must add an
 additional refspec line, as in:
 

alerts.c

@@ -315,11 +315,11 @@ alerts_set_message(struct winlink *wl, const char *type, const char *option)
 		if (visual == VISUAL_OFF)
 			continue;
 		if (c->session->curw == wl) {
-			status_message_set(c, -1, 1, 0, "%s in current window",
-			    type);
+			status_message_set(c, -1, 1, 0, 0,
+			    "%s in current window", type);
 		} else {
-			status_message_set(c, -1, 1, 0, "%s in window %d", type,
-			    wl->idx);
+			status_message_set(c, -1, 1, 0, 0,
+			    "%s in window %d", type, wl->idx);
 		}
 	}
 }

cfg.c

@@ -51,8 +51,7 @@ cfg_done(__unused struct cmdq_item *item, __unused void *data)
 		return (CMD_RETURN_NORMAL);
 	cfg_finished = 1;
 
-	if (!RB_EMPTY(&sessions))
-		cfg_show_causes(RB_MIN(sessions, &sessions));
+	cfg_show_causes(NULL);
 
 	if (cfg_item != NULL)
 		cmdq_continue(cfg_item);
@@ -67,6 +66,7 @@ start_cfg(void)
 {
 	struct client	 *c;
 	u_int		  i;
+	int		  flags = 0;
 
 	/*
 	 * Configuration files are loaded without a client, so commands are run
@@ -84,19 +84,17 @@ start_cfg(void)
 		cmdq_append(c, cfg_item);
 	}
 
-	for (i = 0; i < cfg_nfiles; i++) {
-		if (cfg_quiet)
-			load_cfg(cfg_files[i], c, NULL, CMD_PARSE_QUIET, NULL);
-		else
-			load_cfg(cfg_files[i], c, NULL, 0, NULL);
-	}
+	if (cfg_quiet)
+		flags = CMD_PARSE_QUIET;
+	for (i = 0; i < cfg_nfiles; i++)
+		load_cfg(cfg_files[i], c, NULL, NULL, flags, NULL);
 
 	cmdq_append(NULL, cmdq_get_callback(cfg_done, NULL));
 }
 
 int
-load_cfg(const char *path, struct client *c, struct cmdq_item *item, int flags,
-    struct cmdq_item **new_item)
+load_cfg(const char *path, struct client *c, struct cmdq_item *item,
+    struct cmd_find_state *current, int flags, struct cmdq_item **new_item)
 {
 	FILE			*f;
 	struct cmd_parse_input	 pi;
@@ -124,8 +122,6 @@ load_cfg(const char *path, struct client *c, struct cmdq_item *item, int flags,
 
 	pr = cmd_parse_from_file(f, &pi);
 	fclose(f);
-	if (pr->status == CMD_PARSE_EMPTY)
-		return (0);
 	if (pr->status == CMD_PARSE_ERROR) {
 		cfg_add_cause("%s", pr->error);
 		free(pr->error);
@@ -137,7 +133,7 @@ load_cfg(const char *path, struct client *c, struct cmdq_item *item, int flags,
 	}
 
 	if (item != NULL)
-		state = cmdq_copy_state(cmdq_get_state(item));
+		state = cmdq_copy_state(cmdq_get_state(item), current);
 	else
 		state = cmdq_new_state(NULL, NULL, 0);
 	cmdq_add_format(state, "current_file", "%s", pi.file);
@@ -157,8 +153,8 @@ load_cfg(const char *path, struct client *c, struct cmdq_item *item, int flags,
 
 int
 load_cfg_from_buffer(const void *buf, size_t len, const char *path,
-    struct client *c, struct cmdq_item *item, int flags,
-    struct cmdq_item **new_item)
+    struct client *c, struct cmdq_item *item, struct cmd_find_state *current,
+    int flags, struct cmdq_item **new_item)
 {
 	struct cmd_parse_input	 pi;
 	struct cmd_parse_result	*pr;
@@ -178,8 +174,6 @@ load_cfg_from_buffer(const void *buf, size_t len, const char *path,
 	pi.c = c;
 
 	pr = cmd_parse_from_buffer(buf, len, &pi);
-	if (pr->status == CMD_PARSE_EMPTY)
-		return (0);
 	if (pr->status == CMD_PARSE_ERROR) {
 		cfg_add_cause("%s", pr->error);
 		free(pr->error);
@@ -191,7 +185,7 @@ load_cfg_from_buffer(const void *buf, size_t len, const char *path,
 	}
 
 	if (item != NULL)
-		state = cmdq_copy_state(cmdq_get_state(item));
+		state = cmdq_copy_state(cmdq_get_state(item), current);
 	else
 		state = cmdq_new_state(NULL, NULL, 0);
 	cmdq_add_format(state, "current_file", "%s", pi.file);
@@ -242,11 +236,29 @@ cfg_print_causes(struct cmdq_item *item)
 void
 cfg_show_causes(struct session *s)
 {
+	struct client			*c = TAILQ_FIRST(&clients);
 	struct window_pane		*wp;
 	struct window_mode_entry	*wme;
 	u_int				 i;
 
-	if (s == NULL || cfg_ncauses == 0)
+	if (cfg_ncauses == 0)
+		return;
+
+	if (c != NULL && (c->flags & CLIENT_CONTROL)) {
+		for (i = 0; i < cfg_ncauses; i++) {
+			control_write(c, "%%config-error %s", cfg_causes[i]);
+			free(cfg_causes[i]);
+		}
+		goto out;
+	}
+
+	if (s == NULL) {
+		if (c != NULL && c->session != NULL)
+			s = c->session;
+		else
+			s = RB_MIN(sessions, &sessions);
+	}
+	if (s == NULL || s->attached == 0) /* wait for an attached session */
 		return;
 	wp = s->curw->window->active;
 
@@ -254,10 +266,11 @@ cfg_show_causes(struct session *s)
 	if (wme == NULL || wme->mode != &window_view_mode)
 		window_pane_set_mode(wp, NULL, &window_view_mode, NULL, NULL);
 	for (i = 0; i < cfg_ncauses; i++) {
-		window_copy_add(wp, "%s", cfg_causes[i]);
+		window_copy_add(wp, 0, "%s", cfg_causes[i]);
 		free(cfg_causes[i]);
 	}
 
+out:
 	free(cfg_causes);
 	cfg_causes = NULL;
 	cfg_ncauses = 0;

client.c

@@ -243,9 +243,7 @@ client_main(struct event_base *base, int argc, char **argv, uint64_t flags,
 	ssize_t			 linelen;
 	char			*line = NULL, **caps = NULL, *cause;
 	u_int			 ncaps = 0;
-
-	/* Ignore SIGCHLD now or daemon() in the server will leave a zombie. */
-	signal(SIGCHLD, SIG_IGN);
+	struct args_value	*values;
 
 	/* Set up the initial command. */
 	if (shell_command != NULL) {
@@ -258,17 +256,20 @@ client_main(struct event_base *base, int argc, char **argv, uint64_t flags,
 		msg = MSG_COMMAND;
 
 		/*
-		 * It sucks parsing the command string twice (in client and
-		 * later in server) but it is necessary to get the start server
-		 * flag.
+		 * It's annoying parsing the command string twice (in client
+		 * and later in server) but it is necessary to get the start
+		 * server flag.
 		 */
-		pr = cmd_parse_from_arguments(argc, argv, NULL);
+		values = args_from_vector(argc, argv);
+		pr = cmd_parse_from_arguments(values, argc, NULL);
 		if (pr->status == CMD_PARSE_SUCCESS) {
 			if (cmd_list_any_have(pr->cmdlist, CMD_STARTSERVER))
 				flags |= CLIENT_STARTSERVER;
 			cmd_list_free(pr->cmdlist);
 		} else
 			free(pr->error);
+		args_free_values(values, argc);
+		free(values);
 	}
 
 	/* Create client process structure (starts logging). */
@@ -280,6 +281,12 @@ client_main(struct event_base *base, int argc, char **argv, uint64_t flags,
 	log_debug("flags are %#llx", (unsigned long long)client_flags);
 
 	/* Initialize the client socket and start the server. */
+#ifdef HAVE_SYSTEMD
+	if (systemd_activated()) {
+		/* socket-based activation, do not even try to be a client. */
+		fd = server_start(client_proc, flags, base, 0, NULL);
+	} else
+#endif
 	fd = client_connect(base, socket_path, client_flags);
 	if (fd == -1) {
 		if (errno == ECONNREFUSED) {
@@ -357,6 +364,7 @@ client_main(struct event_base *base, int argc, char **argv, uint64_t flags,
 	/* Send identify messages. */
 	client_send_identify(ttynam, termname, caps, ncaps, cwd, feat);
 	tty_term_free_list(caps, ncaps);
+	proc_flush_peer(client_peer);
 
 	/* Send first command. */
 	if (msg == MSG_COMMAND) {
@@ -444,11 +452,12 @@ client_send_identify(const char *ttynam, const char *termname, char **caps,
 {
 	char	**ss;
 	size_t	  sslen;
-	int	  fd, flags = client_flags;
+	int	  fd;
+	uint64_t  flags = client_flags;
 	pid_t	  pid;
 	u_int	  i;
 
-	proc_send(client_peer, MSG_IDENTIFY_FLAGS, -1, &flags, sizeof flags);
+	proc_send(client_peer, MSG_IDENTIFY_LONGFLAGS, -1, &flags, sizeof flags);
 	proc_send(client_peer, MSG_IDENTIFY_LONGFLAGS, -1, &client_flags,
 	    sizeof client_flags);
 
@@ -489,20 +498,10 @@ client_send_identify(const char *ttynam, const char *termname, char **caps,
 static __dead void
 client_exec(const char *shell, const char *shellcmd)
 {
-	const char	*name, *ptr;
-	char		*argv0;
+	char	*argv0;
 
 	log_debug("shell %s, command %s", shell, shellcmd);
-
-	ptr = strrchr(shell, '/');
-	if (ptr != NULL && *(ptr + 1) != '\0')
-		name = ptr + 1;
-	else
-		name = shell;
-	if (client_flags & CLIENT_LOGIN)
-		xasprintf(&argv0, "-%s", name);
-	else
-		xasprintf(&argv0, "%s", name);
+	argv0 = shell_argv0(shell, !!(client_flags & CLIENT_LOGIN));
 	setenv("SHELL", shell, 1);
 
 	proc_clear_signals(client_proc, 1);
@@ -522,12 +521,23 @@ client_signal(int sig)
 {
 	struct sigaction sigact;
 	int		 status;
+	pid_t		 pid;
 
 	log_debug("%s: %s", __func__, strsignal(sig));
-	if (sig == SIGCHLD)
-		waitpid(WAIT_ANY, &status, WNOHANG);
-	else if (!client_attached) {
-		if (sig == SIGTERM)
+	if (sig == SIGCHLD) {
+		for (;;) {
+			pid = waitpid(WAIT_ANY, &status, WNOHANG);
+			if (pid == 0)
+				break;
+			if (pid == -1) {
+				if (errno == ECHILD)
+					break;
+				log_debug("waitpid failed: %s",
+				    strerror(errno));
+			}
+		}
+	} else if (!client_attached) {
+		if (sig == SIGTERM || sig == SIGHUP)
 			proc_exit(client_proc);
 	} else {
 		switch (sig) {
@@ -689,6 +699,9 @@ client_dispatch_wait(struct imsg *imsg)
 		    !(client_flags & CLIENT_CONTROL), client_file_check_cb,
 		    NULL);
 		break;
+	case MSG_READ_CANCEL:
+		file_read_cancel(&client_files, imsg);
+		break;
 	case MSG_WRITE_OPEN:
 		file_write_open(&client_files, client_peer, imsg, 1,
 		    !(client_flags & CLIENT_CONTROL), client_file_check_cb,

cmd-attach-session.c

@@ -37,13 +37,13 @@ const struct cmd_entry cmd_attach_session_entry = {
 	.name = "attach-session",
 	.alias = "attach",
 
-	.args = { "c:dEf:rt:x", 0, 0 },
+	.args = { "c:dEf:rt:x", 0, 0, NULL },
 	.usage = "[-dErx] [-c working-directory] [-f flags] "
 	         CMD_TARGET_SESSION_USAGE,
 
 	/* -t is special */
 
-	.flags = CMD_STARTSERVER,
+	.flags = CMD_STARTSERVER|CMD_READONLY,
 	.exec = cmd_attach_session_exec
 };
 
@@ -69,6 +69,7 @@ cmd_attach_session(struct cmdq_item *item, const char *tflag, int dflag,
 
 	if (c == NULL)
 		return (CMD_RETURN_NORMAL);
+
 	if (server_client_check_nested(c)) {
 		cmdq_error(item, "sessions should be nested with care, "
 		    "unset $TMUX to force");
@@ -124,17 +125,9 @@ cmd_attach_session(struct cmdq_item *item, const char *tflag, int dflag,
 		if (!Eflag)
 			environ_update(s->options, c->environ, s->environ);
 
-		c->session = s;
+		server_client_set_session(c, s);
 		if (~cmdq_get_flags(item) & CMDQ_STATE_REPEAT)
 			server_client_set_key_table(c, NULL);
-		tty_update_client_offset(c);
-		status_timer_start(c);
-		notify_client("client-session-changed", c);
-		session_update_activity(s, NULL);
-		gettimeofday(&s->last_attached_time, NULL);
-		server_redraw_client(c);
-		s->curw->flags &= ~WINLINK_ALERTFLAGS;
-		s->curw->window->latest = c;
 	} else {
 		if (server_client_open(c, &cause) != 0) {
 			cmdq_error(item, "open terminal failed: %s", cause);
@@ -156,25 +149,17 @@ cmd_attach_session(struct cmdq_item *item, const char *tflag, int dflag,
 		if (!Eflag)
 			environ_update(s->options, c->environ, s->environ);
 
-		c->session = s;
+		server_client_set_session(c, s);
 		server_client_set_key_table(c, NULL);
-		tty_update_client_offset(c);
-		status_timer_start(c);
-		notify_client("client-session-changed", c);
-		session_update_activity(s, NULL);
-		gettimeofday(&s->last_attached_time, NULL);
-		server_redraw_client(c);
-		s->curw->flags &= ~WINLINK_ALERTFLAGS;
-		s->curw->window->latest = c;
 
 		if (~c->flags & CLIENT_CONTROL)
 			proc_send(c->peer, MSG_READY, -1, NULL, 0);
 		notify_client("client-attached", c);
 		c->flags |= CLIENT_ATTACHED;
 	}
-	recalculate_sizes();
-	alerts_check_session(s);
-	server_update_socket();
+
+	if (cfg_finished)
+		cfg_show_causes(s);
 
 	return (CMD_RETURN_NORMAL);
 }

cmd-bind-key.c

@@ -27,20 +27,30 @@
  * Bind a key to a command.
  */
 
-static enum cmd_retval	cmd_bind_key_exec(struct cmd *, struct cmdq_item *);
+static enum args_parse_type	cmd_bind_key_args_parse(struct args *, u_int,
+				    char **);
+static enum cmd_retval		cmd_bind_key_exec(struct cmd *,
+				    struct cmdq_item *);
 
 const struct cmd_entry cmd_bind_key_entry = {
 	.name = "bind-key",
 	.alias = "bind",
 
-	.args = { "nrN:T:", 1, -1 },
+	.args = { "nrN:T:", 1, -1, cmd_bind_key_args_parse },
 	.usage = "[-nr] [-T key-table] [-N note] key "
-	         "[command [arguments]]",
+	         "[command [argument ...]]",
 
 	.flags = CMD_AFTERHOOK,
 	.exec = cmd_bind_key_exec
 };
 
+static enum args_parse_type
+cmd_bind_key_args_parse(__unused struct args *args, __unused u_int idx,
+    __unused char **cause)
+{
+	return (ARGS_PARSE_COMMANDS_OR_STRING);
+}
+
 static enum cmd_retval
 cmd_bind_key_exec(struct cmd *self, struct cmdq_item *item)
 {
@@ -48,12 +58,13 @@ cmd_bind_key_exec(struct cmd *self, struct cmdq_item *item)
 	key_code		  key;
 	const char		 *tablename, *note = args_get(args, 'N');
 	struct cmd_parse_result	 *pr;
-	char			**argv = args->argv;
-	int			  argc = args->argc, repeat;
+	int			  repeat;
+	struct args_value	 *value;
+	u_int			  count = args_count(args);
 
-	key = key_string_lookup_string(argv[0]);
+	key = key_string_lookup_string(args_string(args, 0));
 	if (key == KEYC_NONE || key == KEYC_UNKNOWN) {
-		cmdq_error(item, "unknown key: %s", argv[0]);
+		cmdq_error(item, "unknown key: %s", args_string(args, 0));
 		return (CMD_RETURN_ERROR);
 	}
 
@@ -65,24 +76,32 @@ cmd_bind_key_exec(struct cmd *self, struct cmdq_item *item)
 		tablename = "prefix";
 	repeat = args_has(args, 'r');
 
-	if (argc != 1) {
-		if (argc == 2)
-			pr = cmd_parse_from_string(argv[1], NULL);
-		else
-			pr = cmd_parse_from_arguments(argc - 1, argv + 1, NULL);
-		switch (pr->status) {
-		case CMD_PARSE_EMPTY:
-			cmdq_error(item, "empty command");
-			return (CMD_RETURN_ERROR);
-		case CMD_PARSE_ERROR:
-			cmdq_error(item, "%s", pr->error);
-			free(pr->error);
-			return (CMD_RETURN_ERROR);
-		case CMD_PARSE_SUCCESS:
-			break;
-		}
-		key_bindings_add(tablename, key, note, repeat, pr->cmdlist);
-	} else
+	if (count == 1) {
 		key_bindings_add(tablename, key, note, repeat, NULL);
+		return (CMD_RETURN_NORMAL);
+	}
+
+	value = args_value(args, 1);
+	if (count == 2 && value->type == ARGS_COMMANDS) {
+		key_bindings_add(tablename, key, note, repeat, value->cmdlist);
+		value->cmdlist->references++;
+		return (CMD_RETURN_NORMAL);
+	}
+
+	if (count == 2)
+		pr = cmd_parse_from_string(args_string(args, 1), NULL);
+	else {
+		pr = cmd_parse_from_arguments(args_values(args) + 1, count - 1,
+		    NULL);
+	}
+	switch (pr->status) {
+	case CMD_PARSE_ERROR:
+		cmdq_error(item, "%s", pr->error);
+		free(pr->error);
+		return (CMD_RETURN_ERROR);
+	case CMD_PARSE_SUCCESS:
+		break;
+	}
+	key_bindings_add(tablename, key, note, repeat, pr->cmdlist);
 	return (CMD_RETURN_NORMAL);
 }

cmd-break-pane.c

@@ -34,7 +34,7 @@ const struct cmd_entry cmd_break_pane_entry = {
 	.name = "break-pane",
 	.alias = "breakp",
 
-	.args = { "abdPF:n:s:t:", 0, 0 },
+	.args = { "abdPF:n:s:t:", 0, 0, NULL },
 	.usage = "[-abdP] [-F format] [-n window-name] [-s src-pane] "
 		 "[-t dst-window]",
 
@@ -99,7 +99,7 @@ cmd_break_pane_exec(struct cmd *self, struct cmdq_item *item)
 
 	w = wp->window = window_create(w->sx, w->sy, w->xpixel, w->ypixel);
 	options_set_parent(wp->options, w->options);
-	wp->flags |= PANE_STYLECHANGED;
+	wp->flags |= (PANE_STYLECHANGED|PANE_THEMECHANGED);
 	TAILQ_INSERT_HEAD(&w->panes, wp, entry);
 	w->active = wp;
 	w->latest = tc;
@@ -115,6 +115,7 @@ cmd_break_pane_exec(struct cmd *self, struct cmdq_item *item)
 
 	layout_init(w, wp);
 	wp->flags |= PANE_CHANGED;
+	colour_palette_from_option(&wp->palette, wp->options);
 
 	if (idx == -1)
 		idx = -1 - options_get_number(dst_s->options, "base-index");

cmd-capture-pane.c

@@ -39,8 +39,8 @@ const struct cmd_entry cmd_capture_pane_entry = {
 	.name = "capture-pane",
 	.alias = "capturep",
 
-	.args = { "ab:CeE:JNpPqS:t:", 0, 0 },
-	.usage = "[-aCeJNpPq] " CMD_BUFFER_USAGE " [-E end-line] "
+	.args = { "ab:CeE:JMNpPqS:Tt:", 0, 0, NULL },
+	.usage = "[-aCeJMNpPqT] " CMD_BUFFER_USAGE " [-E end-line] "
 		 "[-S start-line] " CMD_TARGET_PANE_USAGE,
 
 	.target = { 't', CMD_FIND_PANE, 0 },
@@ -53,8 +53,8 @@ const struct cmd_entry cmd_clear_history_entry = {
 	.name = "clear-history",
 	.alias = "clearhist",
 
-	.args = { "t:", 0, 0 },
-	.usage = CMD_TARGET_PANE_USAGE,
+	.args = { "Ht:", 0, 0, NULL },
+	.usage = "[-H] " CMD_TARGET_PANE_USAGE,
 
 	.target = { 't', CMD_FIND_PANE, 0 },
 
@@ -107,14 +107,16 @@ static char *
 cmd_capture_pane_history(struct args *args, struct cmdq_item *item,
     struct window_pane *wp, size_t *len)
 {
-	struct grid		*gd;
-	const struct grid_line	*gl;
-	struct grid_cell	*gc = NULL;
-	int			 n, with_codes, escape_c0, join_lines, no_trim;
-	u_int			 i, sx, top, bottom, tmp;
-	char			*cause, *buf, *line;
-	const char		*Sflag, *Eflag;
-	size_t			 linelen;
+	struct grid			*gd;
+	const struct grid_line		*gl;
+	struct screen			*s;
+	struct grid_cell		*gc = NULL;
+	struct window_mode_entry	*wme;
+	int				 n, join_lines, flags = 0;
+	u_int				 i, sx, top, bottom, tmp;
+	char				*cause, *buf, *line;
+	const char			*Sflag, *Eflag;
+	size_t				 linelen;
 
 	sx = screen_size_x(&wp->base);
 	if (args_has(args, 'a')) {
@@ -126,14 +128,27 @@ cmd_capture_pane_history(struct args *args, struct cmdq_item *item,
 			}
 			return (xstrdup(""));
 		}
-	} else
+		s = &wp->base;
+	} else if (args_has(args, 'M')) {
+		wme = TAILQ_FIRST(&wp->modes);
+		if (wme != NULL && wme->mode->get_screen != NULL) {
+			s = wme->mode->get_screen (wme);
+			gd = s->grid;
+		} else {
+			s = &wp->base;
+			gd = wp->base.grid;
+		}
+	} else {
+		s = &wp->base;
 		gd = wp->base.grid;
+	}
 
 	Sflag = args_get(args, 'S');
 	if (Sflag != NULL && strcmp(Sflag, "-") == 0)
 		top = 0;
 	else {
-		n = args_strtonum(args, 'S', INT_MIN, SHRT_MAX, &cause);
+		n = args_strtonum_and_expand(args, 'S', INT_MIN, SHRT_MAX,
+			item, &cause);
 		if (cause != NULL) {
 			top = gd->hsize;
 			free(cause);
@@ -149,7 +164,8 @@ cmd_capture_pane_history(struct args *args, struct cmdq_item *item,
 	if (Eflag != NULL && strcmp(Eflag, "-") == 0)
 		bottom = gd->hsize + gd->sy - 1;
 	else {
-		n = args_strtonum(args, 'E', INT_MIN, SHRT_MAX, &cause);
+		n = args_strtonum_and_expand(args, 'E', INT_MIN, SHRT_MAX,
+			item, &cause);
 		if (cause != NULL) {
 			bottom = gd->hsize + gd->sy - 1;
 			free(cause);
@@ -167,15 +183,19 @@ cmd_capture_pane_history(struct args *args, struct cmdq_item *item,
 		top = tmp;
 	}
 
-	with_codes = args_has(args, 'e');
-	escape_c0 = args_has(args, 'C');
 	join_lines = args_has(args, 'J');
-	no_trim = args_has(args, 'N');
+	if (args_has(args, 'e'))
+		flags |= GRID_STRING_WITH_SEQUENCES;
+	if (args_has(args, 'C'))
+		flags |= GRID_STRING_ESCAPE_SEQUENCES;
+	if (!join_lines && !args_has(args, 'T'))
+		flags |= GRID_STRING_EMPTY_CELLS;
+	if (!join_lines && !args_has(args, 'N'))
+		flags |= GRID_STRING_TRIM_SPACES;
 
 	buf = NULL;
 	for (i = top; i <= bottom; i++) {
-		line = grid_string_cells(gd, 0, i, sx, &gc, with_codes,
-		    escape_c0, !join_lines && !no_trim);
+		line = grid_string_cells(gd, 0, i, sx, &gc, flags, s);
 		linelen = strlen(line);
 
 		buf = cmd_capture_pane_append(buf, len, line, linelen);
@@ -202,6 +222,8 @@ cmd_capture_pane_exec(struct cmd *self, struct cmdq_item *item)
 	if (cmd_get_entry(self) == &cmd_clear_history_entry) {
 		window_pane_reset_mode_all(wp);
 		grid_clear_history(wp->base.grid);
+		if (args_has(args, 'H'))
+			screen_reset_hyperlinks(wp->screen);
 		return (CMD_RETURN_NORMAL);
 	}
 

cmd-choose-tree.c

@@ -24,13 +24,16 @@
  * Enter a mode.
  */
 
-static enum cmd_retval	cmd_choose_tree_exec(struct cmd *, struct cmdq_item *);
+static enum args_parse_type	cmd_choose_tree_args_parse(struct args *args,
+				    u_int idx, char **cause);
+static enum cmd_retval		cmd_choose_tree_exec(struct cmd *,
+    				    struct cmdq_item *);
 
 const struct cmd_entry cmd_choose_tree_entry = {
 	.name = "choose-tree",
 	.alias = NULL,
 
-	.args = { "F:f:GK:NO:rst:wZ", 0, 1 },
+	.args = { "F:f:GK:NO:rst:wyZ", 0, 1, cmd_choose_tree_args_parse },
 	.usage = "[-GNrswZ] [-F format] [-f filter] [-K key-format] "
 		 "[-O sort-order] " CMD_TARGET_PANE_USAGE " [template]",
 
@@ -44,7 +47,7 @@ const struct cmd_entry cmd_choose_client_entry = {
 	.name = "choose-client",
 	.alias = NULL,
 
-	.args = { "F:f:K:NO:rt:Z", 0, 1 },
+	.args = { "F:f:K:NO:rt:yZ", 0, 1, cmd_choose_tree_args_parse },
 	.usage = "[-NrZ] [-F format] [-f filter] [-K key-format] "
 		 "[-O sort-order] " CMD_TARGET_PANE_USAGE " [template]",
 
@@ -58,7 +61,7 @@ const struct cmd_entry cmd_choose_buffer_entry = {
 	.name = "choose-buffer",
 	.alias = NULL,
 
-	.args = { "F:f:K:NO:rt:Z", 0, 1 },
+	.args = { "F:f:K:NO:rt:yZ", 0, 1, cmd_choose_tree_args_parse },
 	.usage = "[-NrZ] [-F format] [-f filter] [-K key-format] "
 		 "[-O sort-order] " CMD_TARGET_PANE_USAGE " [template]",
 
@@ -72,7 +75,7 @@ const struct cmd_entry cmd_customize_mode_entry = {
 	.name = "customize-mode",
 	.alias = NULL,
 
-	.args = { "F:f:Nt:Z", 0, 0 },
+	.args = { "F:f:Nt:yZ", 0, 0, NULL },
 	.usage = "[-NZ] [-F format] [-f filter] " CMD_TARGET_PANE_USAGE,
 
 	.target = { 't', CMD_FIND_PANE, 0 },
@@ -81,6 +84,13 @@ const struct cmd_entry cmd_customize_mode_entry = {
 	.exec = cmd_choose_tree_exec
 };
 
+static enum args_parse_type
+cmd_choose_tree_args_parse(__unused struct args *args, __unused u_int idx,
+    __unused char **cause)
+{
+	return (ARGS_PARSE_COMMANDS_OR_STRING);
+}
+
 static enum cmd_retval
 cmd_choose_tree_exec(struct cmd *self, struct cmdq_item *item)
 {
@@ -90,7 +100,7 @@ cmd_choose_tree_exec(struct cmd *self, struct cmdq_item *item)
 	const struct window_mode	*mode;
 
 	if (cmd_get_entry(self) == &cmd_choose_buffer_entry) {
-		if (paste_get_top(NULL) == NULL)
+		if (paste_is_empty())
 			return (CMD_RETURN_NORMAL);
 		mode = &window_buffer_mode;
 	} else if (cmd_get_entry(self) == &cmd_choose_client_entry) {

cmd-command-prompt.c

@@ -29,8 +29,10 @@
  * Prompt for command in client.
  */
 
-static enum cmd_retval	cmd_command_prompt_exec(struct cmd *,
-			    struct cmdq_item *);
+static enum args_parse_type	cmd_command_prompt_args_parse(struct args *,
+				    u_int, char **);
+static enum cmd_retval		cmd_command_prompt_exec(struct cmd *,
+				    struct cmdq_item *);
 
 static int	cmd_command_prompt_callback(struct client *, void *,
 		    const char *, int);
@@ -40,79 +42,112 @@ const struct cmd_entry cmd_command_prompt_entry = {
 	.name = "command-prompt",
 	.alias = NULL,
 
-	.args = { "1kiI:Np:Tt:W", 0, 1 },
-	.usage = "[-1kiNTW] [-I inputs] [-p prompts] " CMD_TARGET_CLIENT_USAGE " "
-		 "[template]",
+	.args = { "1bFkiI:Np:t:T:", 0, 1, cmd_command_prompt_args_parse },
+	.usage = "[-1bFkiN] [-I inputs] [-p prompts] " CMD_TARGET_CLIENT_USAGE
+		 " [-T prompt-type] [template]",
 
 	.flags = CMD_CLIENT_TFLAG,
 	.exec = cmd_command_prompt_exec
 };
 
-struct cmd_command_prompt_cdata {
-	int	 flags;
-
-	char	*inputs;
-	char	*next_input;
-
-	char	*prompts;
-	char	*next_prompt;
-
-	char	*template;
-	int	 idx;
+struct cmd_command_prompt_prompt {
+	char	*input;
+	char	*prompt;
 };
 
+struct cmd_command_prompt_cdata {
+	struct cmdq_item		 *item;
+	struct args_command_state	 *state;
+
+	int				  flags;
+	enum prompt_type		  prompt_type;
+
+	struct cmd_command_prompt_prompt *prompts;
+	u_int				  count;
+	u_int				  current;
+
+	int				  argc;
+	char				**argv;
+};
+
+static enum args_parse_type
+cmd_command_prompt_args_parse(__unused struct args *args, __unused u_int idx,
+    __unused char **cause)
+{
+	return (ARGS_PARSE_COMMANDS_OR_STRING);
+}
+
 static enum cmd_retval
 cmd_command_prompt_exec(struct cmd *self, struct cmdq_item *item)
 {
 	struct args			*args = cmd_get_args(self);
 	struct client			*tc = cmdq_get_target_client(item);
 	struct cmd_find_state		*target = cmdq_get_target(item);
-	const char			*inputs, *prompts;
+	const char			*type, *s, *input;
 	struct cmd_command_prompt_cdata	*cdata;
-	char				*prompt, *ptr, *input = NULL;
-	size_t				 n;
+	char				*tmp, *prompts, *prompt, *next_prompt;
+	char				*inputs = NULL, *next_input;
+	u_int				 count = args_count(args);
+	int				 wait = !args_has(args, 'b'), space = 1;
 
 	if (tc->prompt_string != NULL)
 		return (CMD_RETURN_NORMAL);
+	if (args_has(args, 'i'))
+		wait = 0;
 
 	cdata = xcalloc(1, sizeof *cdata);
+	if (wait)
+		cdata->item = item;
+	cdata->state = args_make_commands_prepare(self, item, 0, "%1", wait,
+	    args_has(args, 'F'));
 
-	cdata->inputs = NULL;
-	cdata->next_input = NULL;
-
-	cdata->prompts = NULL;
-	cdata->next_prompt = NULL;
-
-	cdata->template = NULL;
-	cdata->idx = 1;
-
-	if (args->argc != 0)
-		cdata->template = xstrdup(args->argv[0]);
-	else
-		cdata->template = xstrdup("%1");
-
-	if ((prompts = args_get(args, 'p')) != NULL)
-		cdata->prompts = xstrdup(prompts);
-	else if (args->argc != 0) {
-		n = strcspn(cdata->template, " ,");
-		xasprintf(&cdata->prompts, "(%.*s) ", (int) n, cdata->template);
+	if ((s = args_get(args, 'p')) == NULL) {
+		if (count != 0) {
+			tmp = args_make_commands_get_command(cdata->state);
+			xasprintf(&prompts, "(%s)", tmp);
+			free(tmp);
+		} else {
+			prompts = xstrdup(":");
+			space = 0;
+		}
+		next_prompt = prompts;
 	} else
-		cdata->prompts = xstrdup(":");
-
-	/* Get first prompt. */
-	cdata->next_prompt = cdata->prompts;
-	ptr = strsep(&cdata->next_prompt, ",");
-	if (prompts == NULL)
-		prompt = xstrdup(ptr);
+		next_prompt = prompts = xstrdup(s);
+	if ((s = args_get(args, 'I')) != NULL)
+		next_input = inputs = xstrdup(s);
 	else
-		xasprintf(&prompt, "%s ", ptr);
+		next_input = NULL;
+	while ((prompt = strsep(&next_prompt, ",")) != NULL) {
+		cdata->prompts = xreallocarray(cdata->prompts, cdata->count + 1,
+		    sizeof *cdata->prompts);
+		if (!space)
+			tmp = xstrdup(prompt);
+		else
+			xasprintf(&tmp, "%s ", prompt);
+		cdata->prompts[cdata->count].prompt = tmp;
 
-	/* Get initial prompt input. */
-	if ((inputs = args_get(args, 'I')) != NULL) {
-		cdata->inputs = xstrdup(inputs);
-		cdata->next_input = cdata->inputs;
-		input = strsep(&cdata->next_input, ",");
+		if (next_input != NULL) {
+			input = strsep(&next_input, ",");
+			if (input == NULL)
+				input = "";
+		} else
+			input = "";
+		cdata->prompts[cdata->count].input = xstrdup(input);
+
+		cdata->count++;
 	}
+	free(inputs);
+	free(prompts);
+
+	if ((type = args_get(args, 'T')) != NULL) {
+		cdata->prompt_type = status_prompt_type(type);
+		if (cdata->prompt_type == PROMPT_TYPE_INVALID) {
+			cmdq_error(item, "unknown type: %s", type);
+			cmd_command_prompt_free(cdata);
+			return (CMD_RETURN_ERROR);
+		}
+	} else
+		cdata->prompt_type = PROMPT_TYPE_COMMAND;
 
 	if (args_has(args, '1'))
 		cdata->flags |= PROMPT_SINGLE;
@@ -122,62 +157,71 @@ cmd_command_prompt_exec(struct cmd *self, struct cmdq_item *item)
 		cdata->flags |= PROMPT_INCREMENTAL;
 	else if (args_has(args, 'k'))
 		cdata->flags |= PROMPT_KEY;
-	else if (args_has(args, 'W'))
-		cdata->flags |= PROMPT_WINDOW;
-	else if (args_has(args, 'T'))
-		cdata->flags |= PROMPT_TARGET;
-	status_prompt_set(tc, target, prompt, input,
-	    cmd_command_prompt_callback, cmd_command_prompt_free, cdata,
-	    cdata->flags);
-	free(prompt);
+	status_prompt_set(tc, target, cdata->prompts[0].prompt,
+	    cdata->prompts[0].input, cmd_command_prompt_callback,
+	    cmd_command_prompt_free, cdata, cdata->flags, cdata->prompt_type);
 
-	return (CMD_RETURN_NORMAL);
+	if (!wait)
+		return (CMD_RETURN_NORMAL);
+	return (CMD_RETURN_WAIT);
 }
 
 static int
 cmd_command_prompt_callback(struct client *c, void *data, const char *s,
     int done)
 {
-	struct cmd_command_prompt_cdata	*cdata = data;
-	char				*new_template, *prompt, *ptr, *error;
-	char				*input = NULL;
-	enum cmd_parse_status		 status;
+	struct cmd_command_prompt_cdata		 *cdata = data;
+	char					 *error;
+	struct cmdq_item			 *item = cdata->item, *new_item;
+	struct cmd_list				 *cmdlist;
+	struct cmd_command_prompt_prompt	 *prompt;
+	int					  argc = 0;
+	char					**argv = NULL;
 
 	if (s == NULL)
-		return (0);
-	if (done && (cdata->flags & PROMPT_INCREMENTAL))
-		return (0);
+		goto out;
 
-	new_template = cmd_template_replace(cdata->template, s, cdata->idx);
 	if (done) {
-		free(cdata->template);
-		cdata->template = new_template;
+		if (cdata->flags & PROMPT_INCREMENTAL)
+			goto out;
+		cmd_append_argv(&cdata->argc, &cdata->argv, s);
+		if (++cdata->current != cdata->count) {
+			prompt = &cdata->prompts[cdata->current];
+			status_prompt_update(c, prompt->prompt, prompt->input);
+			return (1);
+		}
 	}
 
-	/*
-	 * Check if there are more prompts; if so, get its respective input
-	 * and update the prompt data.
-	 */
-	if (done && (ptr = strsep(&cdata->next_prompt, ",")) != NULL) {
-		xasprintf(&prompt, "%s ", ptr);
-		input = strsep(&cdata->next_input, ",");
-		status_prompt_update(c, prompt, input);
+	argc = cdata->argc;
+	argv = cmd_copy_argv(cdata->argc, cdata->argv);
+	if (!done)
+		cmd_append_argv(&argc, &argv, s);
 
-		free(prompt);
-		cdata->idx++;
-		return (1);
+	if (done) {
+		cmd_free_argv(cdata->argc, cdata->argv);
+		cdata->argc = argc;
+		cdata->argv = cmd_copy_argv(argc, argv);
 	}
 
-	status = cmd_parse_and_append(new_template, NULL, c, NULL, &error);
-	if (status == CMD_PARSE_ERROR) {
+	cmdlist = args_make_commands(cdata->state, argc, argv, &error);
+	if (cmdlist == NULL) {
 		cmdq_append(c, cmdq_get_error(error));
 		free(error);
+	} else if (item == NULL) {
+		new_item = cmdq_get_command(cmdlist, NULL);
+		cmdq_append(c, new_item);
+	} else {
+		new_item = cmdq_get_command(cmdlist, cmdq_get_state(item));
+		cmdq_insert_after(item, new_item);
 	}
+	cmd_free_argv(argc, argv);
 
-	if (!done)
-		free(new_template);
 	if (c->prompt_inputcb != cmd_command_prompt_callback)
 		return (1);
+
+out:
+	if (item != NULL)
+		cmdq_continue(item);
 	return (0);
 }
 
@@ -185,9 +229,14 @@ static void
 cmd_command_prompt_free(void *data)
 {
 	struct cmd_command_prompt_cdata	*cdata = data;
+	u_int				 i;
 
-	free(cdata->inputs);
+	for (i = 0; i < cdata->count; i++) {
+		free(cdata->prompts[i].prompt);
+		free(cdata->prompts[i].input);
+	}
 	free(cdata->prompts);
-	free(cdata->template);
+	cmd_free_argv(cdata->argc, cdata->argv);
+	args_make_commands_free(cdata->state);
 	free(cdata);
 }

cmd-confirm-before.c

@@ -28,8 +28,10 @@
  * Asks for confirmation before executing a command.
  */
 
-static enum cmd_retval	cmd_confirm_before_exec(struct cmd *,
-			    struct cmdq_item *);
+static enum args_parse_type	cmd_confirm_before_args_parse(struct args *,
+				    u_int, char **);
+static enum cmd_retval		cmd_confirm_before_exec(struct cmd *,
+				    struct cmdq_item *);
 
 static int	cmd_confirm_before_callback(struct client *, void *,
 		    const char *, int);
@@ -39,17 +41,28 @@ const struct cmd_entry cmd_confirm_before_entry = {
 	.name = "confirm-before",
 	.alias = "confirm",
 
-	.args = { "p:t:", 1, 1 },
-	.usage = "[-p prompt] " CMD_TARGET_CLIENT_USAGE " command",
+	.args = { "bc:p:t:y", 1, 1, cmd_confirm_before_args_parse },
+	.usage = "[-by] [-c confirm-key] [-p prompt] " CMD_TARGET_CLIENT_USAGE
+		 " command",
 
 	.flags = CMD_CLIENT_TFLAG,
 	.exec = cmd_confirm_before_exec
 };
 
 struct cmd_confirm_before_data {
-	char	*cmd;
+	struct cmdq_item	*item;
+	struct cmd_list		*cmdlist;
+	u_char			 confirm_key;
+	int			 default_yes;
 };
 
+static enum args_parse_type
+cmd_confirm_before_args_parse(__unused struct args *args, __unused u_int idx,
+    __unused char **cause)
+{
+	return (ARGS_PARSE_COMMANDS_OR_STRING);
+}
+
 static enum cmd_retval
 cmd_confirm_before_exec(struct cmd *self, struct cmdq_item *item)
 {
@@ -57,27 +70,51 @@ cmd_confirm_before_exec(struct cmd *self, struct cmdq_item *item)
 	struct cmd_confirm_before_data	*cdata;
 	struct client			*tc = cmdq_get_target_client(item);
 	struct cmd_find_state		*target = cmdq_get_target(item);
-	char				*cmd, *copy, *new_prompt, *ptr;
-	const char			*prompt;
+	char				*new_prompt;
+	const char			*confirm_key, *prompt, *cmd;
+	int				 wait = !args_has(args, 'b');
+
+	cdata = xcalloc(1, sizeof *cdata);
+	cdata->cmdlist = args_make_commands_now(self, item, 0, 1);
+	if (cdata->cmdlist == NULL) {
+		free(cdata);
+		return (CMD_RETURN_ERROR);
+	}
+
+	if (wait)
+		cdata->item = item;
+
+	cdata->default_yes = args_has(args, 'y');
+	if ((confirm_key = args_get(args, 'c')) != NULL) {
+		if (confirm_key[1] == '\0' &&
+		    confirm_key[0] > 31 &&
+		    confirm_key[0] < 127)
+			cdata->confirm_key = confirm_key[0];
+		else {
+			cmdq_error(item, "invalid confirm key");
+			free(cdata);
+			return (CMD_RETURN_ERROR);
+		}
+	}
+	else
+		cdata->confirm_key = 'y';
 
 	if ((prompt = args_get(args, 'p')) != NULL)
 		xasprintf(&new_prompt, "%s ", prompt);
 	else {
-		ptr = copy = xstrdup(args->argv[0]);
-		cmd = strsep(&ptr, " \t");
-		xasprintf(&new_prompt, "Confirm '%s'? (y/n) ", cmd);
-		free(copy);
+		cmd = cmd_get_entry(cmd_list_first(cdata->cmdlist))->name;
+		xasprintf(&new_prompt, "Confirm '%s'? (%c/n) ", cmd,
+		    cdata->confirm_key);
 	}
 
-	cdata = xmalloc(sizeof *cdata);
-	cdata->cmd = xstrdup(args->argv[0]);
-
 	status_prompt_set(tc, target, new_prompt, NULL,
 	    cmd_confirm_before_callback, cmd_confirm_before_free, cdata,
-	    PROMPT_SINGLE);
-
+	    PROMPT_SINGLE, PROMPT_TYPE_COMMAND);
 	free(new_prompt);
-	return (CMD_RETURN_NORMAL);
+
+	if (!wait)
+		return (CMD_RETURN_NORMAL);
+	return (CMD_RETURN_WAIT);
 }
 
 static int
@@ -85,23 +122,34 @@ cmd_confirm_before_callback(struct client *c, void *data, const char *s,
     __unused int done)
 {
 	struct cmd_confirm_before_data	*cdata = data;
-	char				*error;
-	enum cmd_parse_status		 status;
+	struct cmdq_item		*item = cdata->item, *new_item;
+	int				 retcode = 1;
 
 	if (c->flags & CLIENT_DEAD)
-		return (0);
+		goto out;
 
-	if (s == NULL || *s == '\0')
-		return (0);
-	if (tolower((u_char)s[0]) != 'y' || s[1] != '\0')
-		return (0);
+	if (s == NULL)
+		goto out;
+	if (s[0] != cdata->confirm_key && (s[0] != '\r' || !cdata->default_yes))
+		goto out;
+	retcode = 0;
 
-	status = cmd_parse_and_append(cdata->cmd, NULL, c, NULL, &error);
-	if (status == CMD_PARSE_ERROR) {
-		cmdq_append(c, cmdq_get_error(error));
-		free(error);
+	if (item == NULL) {
+		new_item = cmdq_get_command(cdata->cmdlist, NULL);
+		cmdq_append(c, new_item);
+	} else {
+		new_item = cmdq_get_command(cdata->cmdlist,
+		    cmdq_get_state(item));
+		cmdq_insert_after(item, new_item);
 	}
 
+out:
+	if (item != NULL) {
+		if (cmdq_get_client(item) != NULL &&
+		    cmdq_get_client(item)->session == NULL)
+			cmdq_get_client(item)->retval = retcode;
+		cmdq_continue(item);
+	}
 	return (0);
 }
 
@@ -110,6 +158,6 @@ cmd_confirm_before_free(void *data)
 {
 	struct cmd_confirm_before_data	*cdata = data;
 
-	free(cdata->cmd);
+	cmd_list_free(cdata->cmdlist);
 	free(cdata);
 }

cmd-copy-mode.c

@@ -30,8 +30,8 @@ const struct cmd_entry cmd_copy_mode_entry = {
 	.name = "copy-mode",
 	.alias = NULL,
 
-	.args = { "eHMs:t:uq", 0, 0 },
-	.usage = "[-eHMuq] [-s src-pane] " CMD_TARGET_PANE_USAGE,
+	.args = { "deHMqSs:t:u", 0, 0, NULL },
+	.usage = "[-deHMqSu] [-s src-pane] " CMD_TARGET_PANE_USAGE,
 
 	.source =  { 's', CMD_FIND_PANE, 0 },
 	.target = { 't', CMD_FIND_PANE, 0 },
@@ -44,7 +44,7 @@ const struct cmd_entry cmd_clock_mode_entry = {
 	.name = "clock-mode",
 	.alias = NULL,
 
-	.args = { "t:", 0, 0 },
+	.args = { "t:", 0, 0, NULL },
 	.usage = CMD_TARGET_PANE_USAGE,
 
 	.target = { 't', CMD_FIND_PANE, 0 },
@@ -91,6 +91,13 @@ cmd_copy_mode_exec(struct cmd *self, struct cmdq_item *item)
 	}
 	if (args_has(args, 'u'))
 		window_copy_pageup(wp, 0);
+	if (args_has(args, 'd'))
+		window_copy_pagedown(wp, 0, args_has(args, 'e'));
+	if (args_has(args, 'S')) {
+		window_copy_scroll(wp, c->tty.mouse_slider_mpos, event->m.y,
+		    args_has(args, 'e'));
+		return (CMD_RETURN_NORMAL);
+	}
 
 	return (CMD_RETURN_NORMAL);
 }

cmd-detach-client.c

@@ -33,7 +33,7 @@ const struct cmd_entry cmd_detach_client_entry = {
 	.name = "detach-client",
 	.alias = "detach",
 
-	.args = { "aE:s:t:P", 0, 0 },
+	.args = { "aE:s:t:P", 0, 0, NULL },
 	.usage = "[-aP] [-E shell-command] "
 	         "[-s target-session] " CMD_TARGET_CLIENT_USAGE,
 
@@ -47,7 +47,7 @@ const struct cmd_entry cmd_suspend_client_entry = {
 	.name = "suspend-client",
 	.alias = "suspendc",
 
-	.args = { "t:", 0, 0 },
+	.args = { "t:", 0, 0, NULL },
 	.usage = CMD_TARGET_CLIENT_USAGE,
 
 	.flags = CMD_CLIENT_TFLAG,

cmd-display-menu.c

@@ -27,18 +27,22 @@
  * Display a menu on a client.
  */
 
-static enum cmd_retval	cmd_display_menu_exec(struct cmd *,
-			    struct cmdq_item *);
-static enum cmd_retval	cmd_display_popup_exec(struct cmd *,
-			    struct cmdq_item *);
+static enum args_parse_type	cmd_display_menu_args_parse(struct args *,
+				    u_int, char **);
+static enum cmd_retval		cmd_display_menu_exec(struct cmd *,
+				    struct cmdq_item *);
+static enum cmd_retval		cmd_display_popup_exec(struct cmd *,
+				    struct cmdq_item *);
 
 const struct cmd_entry cmd_display_menu_entry = {
 	.name = "display-menu",
 	.alias = "menu",
 
-	.args = { "c:t:OT:x:y:", 1, -1 },
-	.usage = "[-O] [-c target-client] " CMD_TARGET_PANE_USAGE " [-T title] "
-		 "[-x position] [-y position] name key command ...",
+	.args = { "b:c:C:H:s:S:MOt:T:x:y:", 1, -1, cmd_display_menu_args_parse },
+	.usage = "[-MO] [-b border-lines] [-c target-client] "
+		 "[-C starting-choice] [-H selected-style] [-s style] "
+		 "[-S border-style] " CMD_TARGET_PANE_USAGE " [-T title] "
+		 "[-x position] [-y position] name [key] [command] ...",
 
 	.target = { 't', CMD_FIND_PANE, 0 },
 
@@ -50,10 +54,12 @@ const struct cmd_entry cmd_display_popup_entry = {
 	.name = "display-popup",
 	.alias = "popup",
 
-	.args = { "Cc:d:Eh:t:w:x:y:", 0, -1 },
-	.usage = "[-CE] [-c target-client] [-d start-directory] [-h height] "
-	         CMD_TARGET_PANE_USAGE " [-w width] "
-	         "[-x position] [-y position] [command]",
+	.args = { "Bb:Cc:d:e:Eh:s:S:t:T:w:x:y:", 0, -1, NULL },
+	.usage = "[-BCE] [-b border-lines] [-c target-client] "
+		 "[-d start-directory] [-e environment] [-h height] "
+		 "[-s style] [-S border-style] " CMD_TARGET_PANE_USAGE
+		 " [-T title] [-w width] [-x position] [-y position] "
+		 "[shell-command [argument ...]]",
 
 	.target = { 't', CMD_FIND_PANE, 0 },
 
@@ -61,6 +67,30 @@ const struct cmd_entry cmd_display_popup_entry = {
 	.exec = cmd_display_popup_exec
 };
 
+static enum args_parse_type
+cmd_display_menu_args_parse(struct args *args, u_int idx, __unused char **cause)
+{
+	u_int			 i = 0;
+	enum args_parse_type	 type = ARGS_PARSE_STRING;
+
+	for (;;) {
+		type = ARGS_PARSE_STRING;
+		if (i == idx)
+			break;
+		if (*args_string(args, i++) == '\0')
+			continue;
+
+		type = ARGS_PARSE_STRING;
+		if (i++ == idx)
+			break;
+
+		type = ARGS_PARSE_COMMANDS_OR_STRING;
+		if (i++ == idx)
+			break;
+	}
+	return (type);
+}
+
 static int
 cmd_display_menu_get_position(struct client *tc, struct cmdq_item *item,
     struct args *args, u_int *px, u_int *py, u_int w, u_int h)
@@ -120,8 +150,6 @@ cmd_display_menu_get_position(struct client *tc, struct cmdq_item *item,
 			if (sr != NULL)
 				break;
 		}
-		if (line == lines)
-			ranges = &tc->status.entries[0].ranges;
 
 		if (sr != NULL) {
 			format_add(ft, "popup_window_status_line_x", "%u",
@@ -174,8 +202,8 @@ cmd_display_menu_get_position(struct client *tc, struct cmdq_item *item,
 		} else
 			format_add(ft, "popup_mouse_centre_y", "%ld", n);
 		n = (long)event->m.y + h;
-		if (n + h >= tty->sy)
-			format_add(ft, "popup_mouse_top", "%u", tty->sy - h);
+		if (n >= tty->sy)
+			format_add(ft, "popup_mouse_top", "%u", tty->sy - 1);
 		else
 			format_add(ft, "popup_mouse_top", "%ld", n);
 		n = event->m.y - h;
@@ -205,7 +233,7 @@ cmd_display_menu_get_position(struct client *tc, struct cmdq_item *item,
 	if (xp == NULL || strcmp(xp, "C") == 0)
 		xp = "#{popup_centre_x}";
 	else if (strcmp(xp, "R") == 0)
-		xp = "#{popup_right}";
+		xp = "#{popup_pane_right}";
 	else if (strcmp(xp, "P") == 0)
 		xp = "#{popup_pane_left}";
 	else if (strcmp(xp, "M") == 0)
@@ -219,7 +247,7 @@ cmd_display_menu_get_position(struct client *tc, struct cmdq_item *item,
 	else if (n < 0)
 		n = 0;
 	*px = n;
-	log_debug("%s: -x: %s = %s = %u", __func__, xp, p, *px);
+	log_debug("%s: -x: %s = %s = %u (-w %u)", __func__, xp, p, *px, w);
 	free(p);
 
 	/* Expand vertical position  */
@@ -245,9 +273,10 @@ cmd_display_menu_get_position(struct client *tc, struct cmdq_item *item,
 	else if (n < 0)
 		n = 0;
 	*py = n;
-	log_debug("%s: -y: %s = %s = %u", __func__, yp, p, *py);
+	log_debug("%s: -y: %s = %s = %u (-h %u)", __func__, yp, p, *py, h);
 	free(p);
 
+	format_free(ft);
 	return (1);
 }
 
@@ -260,42 +289,62 @@ cmd_display_menu_exec(struct cmd *self, struct cmdq_item *item)
 	struct client		*tc = cmdq_get_target_client(item);
 	struct menu		*menu = NULL;
 	struct menu_item	 menu_item;
-	const char		*key;
-	char			*title, *name;
-	int			 flags = 0, i;
-	u_int			 px, py;
+	const char		*key, *name, *value;
+	const char		*style = args_get(args, 's');
+	const char		*border_style = args_get(args, 'S');
+	const char		*selected_style = args_get(args, 'H');
+	enum box_lines		 lines = BOX_LINES_DEFAULT;
+	char			*title, *cause;
+	int			 flags = 0, starting_choice = 0;
+	u_int			 px, py, i, count = args_count(args);
+	struct options		*o = target->s->curw->window->options;
+	struct options_entry	*oe;
+
 
 	if (tc->overlay_draw != NULL)
 		return (CMD_RETURN_NORMAL);
 
+	if (args_has(args, 'C')) {
+		if (strcmp(args_get(args, 'C'), "-") == 0)
+			starting_choice = -1;
+		else {
+			starting_choice = args_strtonum(args, 'C', 0, UINT_MAX,
+			    &cause);
+			if (cause != NULL) {
+				cmdq_error(item, "starting choice %s", cause);
+				free(cause);
+				return (CMD_RETURN_ERROR);
+			}
+		}
+	}
+
 	if (args_has(args, 'T'))
 		title = format_single_from_target(item, args_get(args, 'T'));
 	else
 		title = xstrdup("");
 	menu = menu_create(title);
+	free(title);
 
-	for (i = 0; i != args->argc; /* nothing */) {
-		name = args->argv[i++];
+	for (i = 0; i != count; /* nothing */) {
+		name = args_string(args, i++);
 		if (*name == '\0') {
 			menu_add_item(menu, NULL, item, tc, target);
 			continue;
 		}
 
-		if (args->argc - i < 2) {
+		if (count - i < 2) {
 			cmdq_error(item, "not enough arguments");
-			free(title);
 			menu_free(menu);
 			return (CMD_RETURN_ERROR);
 		}
-		key = args->argv[i++];
+		key = args_string(args, i++);
 
 		menu_item.name = name;
 		menu_item.key = key_string_lookup_string(key);
-		menu_item.command = args->argv[i++];
+		menu_item.command = args_string(args, i++);
 
 		menu_add_item(menu, &menu_item, item, tc, target);
 	}
-	free(title);
 	if (menu == NULL) {
 		cmdq_error(item, "invalid menu arguments");
 		return (CMD_RETURN_ERROR);
@@ -310,12 +359,24 @@ cmd_display_menu_exec(struct cmd *self, struct cmdq_item *item)
 		return (CMD_RETURN_NORMAL);
 	}
 
+	value = args_get(args, 'b');
+	if (value != NULL) {
+		oe = options_get(o, "menu-border-lines");
+		lines = options_find_choice(options_table_entry(oe), value,
+		    &cause);
+		if (lines == -1) {
+			cmdq_error(item, "menu-border-lines %s", cause);
+			free(cause);
+			return (CMD_RETURN_ERROR);
+		}
+	}
+
 	if (args_has(args, 'O'))
 		flags |= MENU_STAYOPEN;
-	if (!event->m.valid)
+	if (!event->m.valid && !args_has(args, 'M'))
 		flags |= MENU_NOMOUSE;
-	if (menu_display(menu, flags, item, px, py, tc, target, NULL,
-	    NULL) != 0)
+	if (menu_display(menu, flags, starting_choice, item, px, py, tc, lines,
+	    style, selected_style, border_style, target, NULL, NULL) != 0)
 		return (CMD_RETURN_NORMAL);
 	return (CMD_RETURN_WAIT);
 }
@@ -328,11 +389,17 @@ cmd_display_popup_exec(struct cmd *self, struct cmdq_item *item)
 	struct session		*s = target->s;
 	struct client		*tc = cmdq_get_target_client(item);
 	struct tty		*tty = &tc->tty;
-	const char		*value, *shell[] = { NULL, NULL };
-	const char		*shellcmd = NULL;
-	char			*cwd, *cause, **argv = args->argv;
-	int			 flags = 0, argc = args->argc;
-	u_int			 px, py, w, h;
+	const char		*value, *shell, *shellcmd = NULL;
+	const char		*style = args_get(args, 's');
+	const char		*border_style = args_get(args, 'S');
+	char			*cwd, *cause = NULL, **argv = NULL, *title;
+	int			 flags = 0, argc = 0;
+	enum box_lines		 lines = BOX_LINES_DEFAULT;
+	u_int			 px, py, w, h, count = args_count(args);
+	struct args_value	*av;
+	struct environ		*env = NULL;
+	struct options		*o = s->curw->window->options;
+	struct options_entry	*oe;
 
 	if (args_has(args, 'C')) {
 		server_client_clear_overlay(tc);
@@ -361,37 +428,75 @@ cmd_display_popup_exec(struct cmd *self, struct cmdq_item *item)
 		}
 	}
 
-	if (w > tty->sx - 1)
-		w = tty->sx - 1;
-	if (h > tty->sy - 1)
-		h = tty->sy - 1;
+	if (w > tty->sx)
+		w = tty->sx;
+	if (h > tty->sy)
+		h = tty->sy;
 	if (!cmd_display_menu_get_position(tc, item, args, &px, &py, w, h))
 		return (CMD_RETURN_NORMAL);
 
+	value = args_get(args, 'b');
+	if (args_has(args, 'B'))
+		lines = BOX_LINES_NONE;
+	else if (value != NULL) {
+		oe = options_get(o, "popup-border-lines");
+		lines = options_find_choice(options_table_entry(oe), value,
+		    &cause);
+		if (cause != NULL) {
+			cmdq_error(item, "popup-border-lines %s", cause);
+			free(cause);
+			return (CMD_RETURN_ERROR);
+		}
+	}
+
 	value = args_get(args, 'd');
 	if (value != NULL)
 		cwd = format_single_from_target(item, value);
 	else
 		cwd = xstrdup(server_client_get_cwd(tc, s));
-	if (argc == 0)
+	if (count == 0)
 		shellcmd = options_get_string(s->options, "default-command");
-	else if (argc == 1)
-		shellcmd = argv[0];
-	if (argc <= 1 && (shellcmd == NULL || *shellcmd == '\0')) {
+	else if (count == 1)
+		shellcmd = args_string(args, 0);
+	if (count <= 1 && (shellcmd == NULL || *shellcmd == '\0')) {
 		shellcmd = NULL;
-		shell[0] = options_get_string(s->options, "default-shell");
-		if (!checkshell(shell[0]))
-			shell[0] = _PATH_BSHELL;
-		argc = 1;
-		argv = (char**)shell;
+		shell = options_get_string(s->options, "default-shell");
+		if (!checkshell(shell))
+			shell = _PATH_BSHELL;
+		cmd_append_argv(&argc, &argv, shell);
+	} else
+		args_to_vector(args, &argc, &argv);
+
+	if (args_has(args, 'e') >= 1) {
+		env = environ_create();
+		av = args_first_value(args, 'e');
+		while (av != NULL) {
+			environ_put(env, av->string, 0);
+			av = args_next_value(av);
+		}
 	}
 
+	if (args_has(args, 'T'))
+		title = format_single_from_target(item, args_get(args, 'T'));
+	else
+		title = xstrdup("");
 	if (args_has(args, 'E') > 1)
 		flags |= POPUP_CLOSEEXITZERO;
 	else if (args_has(args, 'E'))
 		flags |= POPUP_CLOSEEXIT;
-	if (popup_display(flags, item, px, py, w, h, shellcmd, argc, argv, cwd,
-	    tc, s, NULL, NULL) != 0)
+	if (popup_display(flags, lines, item, px, py, w, h, env, shellcmd, argc,
+	    argv, cwd, title, tc, s, style, border_style, NULL, NULL) != 0) {
+		cmd_free_argv(argc, argv);
+		if (env != NULL)
+			environ_free(env);
+		free(cwd);
+		free(title);
 		return (CMD_RETURN_NORMAL);
+	}
+	if (env != NULL)
+		environ_free(env);
+	free(cwd);
+	free(title);
+	cmd_free_argv(argc, argv);
 	return (CMD_RETURN_WAIT);
 }

cmd-display-message.c

@@ -39,8 +39,8 @@ const struct cmd_entry cmd_display_message_entry = {
 	.name = "display-message",
 	.alias = "display",
 
-	.args = { "acd:INpt:F:v", 0, 1 },
-	.usage = "[-aINpv] [-c target-client] [-d delay] [-F format] "
+	.args = { "aCc:d:lINpt:F:v", 0, 1, NULL },
+	.usage = "[-aCIlNpv] [-c target-client] [-d delay] [-F format] "
 		 CMD_TARGET_PANE_USAGE " [message]",
 
 	.target = { 't', CMD_FIND_PANE, CMD_FIND_CANFAIL },
@@ -68,22 +68,28 @@ cmd_display_message_exec(struct cmd *self, struct cmdq_item *item)
 	struct window_pane	*wp = target->wp;
 	const char		*template;
 	char			*msg, *cause;
-	int			 delay = -1;
+	int			 delay = -1, flags, Nflag = args_has(args, 'N');
+	int			 Cflag = args_has(args, 'C');
 	struct format_tree	*ft;
-	int			 flags;
+	u_int			 count = args_count(args);
+	struct evbuffer		*evb;
 
 	if (args_has(args, 'I')) {
 		if (wp == NULL)
 			return (CMD_RETURN_NORMAL);
-		if (window_pane_start_input(wp, item, &cause) != 0) {
+		switch (window_pane_start_input(wp, item, &cause)) {
+		case -1:
 			cmdq_error(item, "%s", cause);
 			free(cause);
 			return (CMD_RETURN_ERROR);
+		case 1:
+			return (CMD_RETURN_NORMAL);
+		case 0:
+			return (CMD_RETURN_WAIT);
 		}
-		return (CMD_RETURN_WAIT);
 	}
 
-	if (args_has(args, 'F') && args->argc != 0) {
+	if (args_has(args, 'F') && count != 0) {
 		cmdq_error(item, "only one of -F or argument must be given");
 		return (CMD_RETURN_ERROR);
 	}
@@ -97,9 +103,10 @@ cmd_display_message_exec(struct cmd *self, struct cmdq_item *item)
 		}
 	}
 
-	template = args_get(args, 'F');
-	if (args->argc != 0)
-		template = args->argv[0];
+	if (count != 0)
+		template = args_string(args, 0);
+	else
+		template = args_get(args, 'F');
 	if (template == NULL)
 		template = DISPLAY_MESSAGE_TEMPLATE;
 
@@ -127,15 +134,24 @@ cmd_display_message_exec(struct cmd *self, struct cmdq_item *item)
 		return (CMD_RETURN_NORMAL);
 	}
 
-	msg = format_expand_time(ft, template);
+	if (args_has(args, 'l'))
+		msg = xstrdup(template);
+	else
+		msg = format_expand_time(ft, template);
+
 	if (cmdq_get_client(item) == NULL)
 		cmdq_error(item, "%s", msg);
 	else if (args_has(args, 'p'))
 		cmdq_print(item, "%s", msg);
-	else if (tc != NULL) {
-		status_message_set(tc, delay, 0, args_has(args, 'N'), "%s",
-		    msg);
-	}
+	else if (tc != NULL && (tc->flags & CLIENT_CONTROL)) {
+		evb = evbuffer_new();
+		if (evb == NULL)
+			fatalx("out of memory");
+		evbuffer_add_printf(evb, "%%message %s", msg);
+		server_client_print(tc, 0, evb);
+		evbuffer_free(evb);
+	} else if (tc != NULL)
+		status_message_set(tc, delay, 0, Nflag, Cflag, "%s", msg);
 	free(msg);
 
 	format_free(ft);

cmd-display-panes.c

@@ -27,14 +27,16 @@
  * Display panes on a client.
  */
 
-static enum cmd_retval	cmd_display_panes_exec(struct cmd *,
-			    struct cmdq_item *);
+static enum args_parse_type	cmd_display_panes_args_parse(struct args *,
+				    u_int, char **);
+static enum cmd_retval		cmd_display_panes_exec(struct cmd *,
+				    struct cmdq_item *);
 
 const struct cmd_entry cmd_display_panes_entry = {
 	.name = "display-panes",
 	.alias = "displayp",
 
-	.args = { "bd:Nt:", 0, 1 },
+	.args = { "bd:Nt:", 0, 1, cmd_display_panes_args_parse },
 	.usage = "[-bN] [-d duration] " CMD_TARGET_CLIENT_USAGE " [template]",
 
 	.flags = CMD_AFTERHOOK|CMD_CLIENT_TFLAG,
@@ -42,10 +44,17 @@ const struct cmd_entry cmd_display_panes_entry = {
 };
 
 struct cmd_display_panes_data {
-	struct cmdq_item	*item;
-	char			*command;
+	struct cmdq_item		*item;
+	struct args_command_state	*state;
 };
 
+static enum args_parse_type
+cmd_display_panes_args_parse(__unused struct args *args, __unused u_int idx,
+    __unused char **cause)
+{
+	return (ARGS_PARSE_COMMANDS_OR_STRING);
+}
+
 static void
 cmd_display_panes_draw_pane(struct screen_redraw_ctx *ctx,
     struct window_pane *wp)
@@ -135,11 +144,11 @@ cmd_display_panes_draw_pane(struct screen_redraw_ctx *ctx,
 		llen = 0;
 
 	if (sx < len * 6 || sy < 5) {
-		tty_attributes(tty, &fgc, &grid_default_cell, NULL);
+		tty_attributes(tty, &fgc, &grid_default_cell, NULL, NULL);
 		if (sx >= len + llen + 1) {
 			len += llen + 1;
 			tty_cursor(tty, xoff + px - len / 2, yoff + py);
-			tty_putn(tty, buf, len,  len);
+			tty_putn(tty, buf, len,	 len);
 			tty_putn(tty, " ", 1, 1);
 			tty_putn(tty, lbuf, llen, llen);
 		} else {
@@ -152,7 +161,7 @@ cmd_display_panes_draw_pane(struct screen_redraw_ctx *ctx,
 	px -= len * 3;
 	py -= 2;
 
-	tty_attributes(tty, &bgc, &grid_default_cell, NULL);
+	tty_attributes(tty, &bgc, &grid_default_cell, NULL, NULL);
 	for (ptr = buf; *ptr != '\0'; ptr++) {
 		if (*ptr < '0' || *ptr > '9')
 			continue;
@@ -170,7 +179,7 @@ cmd_display_panes_draw_pane(struct screen_redraw_ctx *ctx,
 
 	if (sy <= 6)
 		goto out;
-	tty_attributes(tty, &fgc, &grid_default_cell, NULL);
+	tty_attributes(tty, &fgc, &grid_default_cell, NULL, NULL);
 	if (rlen != 0 && sx >= rlen) {
 		tty_cursor(tty, xoff + sx - rlen, yoff);
 		tty_putn(tty, rbuf, rlen, rlen);
@@ -186,7 +195,8 @@ out:
 }
 
 static void
-cmd_display_panes_draw(struct client *c, struct screen_redraw_ctx *ctx)
+cmd_display_panes_draw(struct client *c, __unused void *data,
+    struct screen_redraw_ctx *ctx)
 {
 	struct window		*w = c->session->curw->window;
 	struct window_pane	*wp;
@@ -200,24 +210,25 @@ cmd_display_panes_draw(struct client *c, struct screen_redraw_ctx *ctx)
 }
 
 static void
-cmd_display_panes_free(struct client *c)
+cmd_display_panes_free(__unused struct client *c, void *data)
 {
-	struct cmd_display_panes_data	*cdata = c->overlay_data;
+	struct cmd_display_panes_data	*cdata = data;
 
 	if (cdata->item != NULL)
 		cmdq_continue(cdata->item);
-	free(cdata->command);
+	args_make_commands_free(cdata->state);
 	free(cdata);
 }
 
 static int
-cmd_display_panes_key(struct client *c, struct key_event *event)
+cmd_display_panes_key(struct client *c, void *data, struct key_event *event)
 {
-	struct cmd_display_panes_data	*cdata = c->overlay_data;
-	char				*cmd, *expanded, *error;
+	struct cmd_display_panes_data	*cdata = data;
+	char				*expanded, *error;
+	struct cmdq_item		*item = cdata->item, *new_item;
+	struct cmd_list			*cmdlist;
 	struct window			*w = c->session->curw->window;
 	struct window_pane		*wp;
-	enum cmd_parse_status		 status;
 	u_int				 index;
 	key_code			 key;
 
@@ -235,18 +246,22 @@ cmd_display_panes_key(struct client *c, struct key_event *event)
 	wp = window_pane_at_index(w, index);
 	if (wp == NULL)
 		return (1);
-	window_unzoom(w);
+	window_unzoom(w, 1);
 
 	xasprintf(&expanded, "%%%u", wp->id);
-	cmd = cmd_template_replace(cdata->command, expanded, 1);
 
-	status = cmd_parse_and_append(cmd, NULL, c, NULL, &error);
-	if (status == CMD_PARSE_ERROR) {
+	cmdlist = args_make_commands(cdata->state, 1, &expanded, &error);
+	if (cmdlist == NULL) {
 		cmdq_append(c, cmdq_get_error(error));
 		free(error);
+	} else if (item == NULL) {
+		new_item = cmdq_get_command(cmdlist, NULL);
+		cmdq_append(c, new_item);
+	} else {
+		new_item = cmdq_get_command(cmdlist, cmdq_get_state(item));
+		cmdq_insert_after(item, new_item);
 	}
 
-	free(cmd);
 	free(expanded);
 	return (1);
 }
@@ -257,9 +272,10 @@ cmd_display_panes_exec(struct cmd *self, struct cmdq_item *item)
 	struct args			*args = cmd_get_args(self);
 	struct client			*tc = cmdq_get_target_client(item);
 	struct session			*s = tc->session;
-	u_int		 		 delay;
+	u_int				 delay;
 	char				*cause;
 	struct cmd_display_panes_data	*cdata;
+	int				 wait = !args_has(args, 'b');
 
 	if (tc->overlay_draw != NULL)
 		return (CMD_RETURN_NORMAL);
@@ -274,27 +290,23 @@ cmd_display_panes_exec(struct cmd *self, struct cmdq_item *item)
 	} else
 		delay = options_get_number(s->options, "display-panes-time");
 
-	cdata = xmalloc(sizeof *cdata);
-	if (args->argc != 0)
-		cdata->command = xstrdup(args->argv[0]);
-	else
-		cdata->command = xstrdup("select-pane -t '%%'");
-	if (args_has(args, 'b'))
-		cdata->item = NULL;
-	else
+	cdata = xcalloc(1, sizeof *cdata);
+	if (wait)
 		cdata->item = item;
+	cdata->state = args_make_commands_prepare(self, item, 0,
+	    "select-pane -t \"%%%\"", wait, 0);
 
 	if (args_has(args, 'N')) {
 		server_client_set_overlay(tc, delay, NULL, NULL,
-		    cmd_display_panes_draw, NULL, cmd_display_panes_free,
+		    cmd_display_panes_draw, NULL, cmd_display_panes_free, NULL,
 		    cdata);
 	} else {
 		server_client_set_overlay(tc, delay, NULL, NULL,
 		    cmd_display_panes_draw, cmd_display_panes_key,
-		    cmd_display_panes_free, cdata);
+		    cmd_display_panes_free, NULL, cdata);
 	}
 
-	if (args_has(args, 'b'))
+	if (!wait)
 		return (CMD_RETURN_NORMAL);
 	return (CMD_RETURN_WAIT);
 }

cmd-find-window.c

@@ -32,7 +32,7 @@ const struct cmd_entry cmd_find_window_entry = {
 	.name = "find-window",
 	.alias = "findw",
 
-	.args = { "CiNrt:TZ", 1, 1 },
+	.args = { "CiNrt:TZ", 1, 1, NULL },
 	.usage = "[-CiNrTZ] " CMD_TARGET_PANE_USAGE " match-string",
 
 	.target = { 't', CMD_FIND_PANE, 0 },
@@ -47,14 +47,17 @@ cmd_find_window_exec(struct cmd *self, struct cmdq_item *item)
 	struct args		*args = cmd_get_args(self), *new_args;
 	struct cmd_find_state	*target = cmdq_get_target(item);
 	struct window_pane	*wp = target->wp;
-	const char		*s = args->argv[0], *suffix = "";
-	char			*filter, *argv = { NULL };
+	const char		*s = args_string(args, 0), *suffix = "";
+	const char		*star = "*";
+	struct args_value	*filter;
 	int			 C, N, T;
 
 	C = args_has(args, 'C');
 	N = args_has(args, 'N');
 	T = args_has(args, 'T');
 
+	if (args_has(args, 'r'))
+		star = "";
 	if (args_has(args, 'r') && args_has(args, 'i'))
 		suffix = "/ri";
 	else if (args_has(args, 'r'))
@@ -65,41 +68,49 @@ cmd_find_window_exec(struct cmd *self, struct cmdq_item *item)
 	if (!C && !N && !T)
 		C = N = T = 1;
 
-	if (C && N && T) {
-		xasprintf(&filter,
-		    "#{||:"
-		    "#{C%s:%s},#{||:#{m%s:*%s*,#{window_name}},"
-		    "#{m%s:*%s*,#{pane_title}}}}",
-		    suffix, s, suffix, s, suffix, s);
-	} else if (C && N) {
-		xasprintf(&filter,
-		    "#{||:#{C%s:%s},#{m%s:*%s*,#{window_name}}}",
-		    suffix, s, suffix, s);
-	} else if (C && T) {
-		xasprintf(&filter,
-		    "#{||:#{C%s:%s},#{m%s:*%s*,#{pane_title}}}",
-		    suffix, s, suffix, s);
-	} else if (N && T) {
-		xasprintf(&filter,
-		    "#{||:#{m%s:*%s*,#{window_name}},"
-		    "#{m%s:*%s*,#{pane_title}}}",
-		    suffix, s, suffix, s);
-	} else if (C)
-		xasprintf(&filter, "#{C%s:%s}", suffix, s);
-	else if (N)
-		xasprintf(&filter, "#{m%s:*%s*,#{window_name}}", suffix, s);
-	else
-		xasprintf(&filter, "#{m%s:*%s*,#{pane_title}}", suffix, s);
+	filter = xcalloc(1, sizeof *filter);
+	filter->type = ARGS_STRING;
 
-	new_args = args_parse("", 1, &argv);
+	if (C && N && T) {
+		xasprintf(&filter->string,
+		    "#{||:"
+		    "#{C%s:%s},#{||:#{m%s:%s%s%s,#{window_name}},"
+		    "#{m%s:%s%s%s,#{pane_title}}}}",
+		    suffix, s, suffix, star, s, star, suffix, star, s, star);
+	} else if (C && N) {
+		xasprintf(&filter->string,
+		    "#{||:#{C%s:%s},#{m%s:%s%s%s,#{window_name}}}",
+		    suffix, s, suffix, star, s, star);
+	} else if (C && T) {
+		xasprintf(&filter->string,
+		    "#{||:#{C%s:%s},#{m%s:%s%s%s,#{pane_title}}}",
+		    suffix, s, suffix, star, s, star);
+	} else if (N && T) {
+		xasprintf(&filter->string,
+		    "#{||:#{m%s:%s%s%s,#{window_name}},"
+		    "#{m%s:%s%s%s,#{pane_title}}}",
+		    suffix, star, s, star, suffix, star, s, star);
+	} else if (C) {
+		xasprintf(&filter->string,
+		    "#{C%s:%s}",
+		    suffix, s);
+	} else if (N) {
+		xasprintf(&filter->string,
+		    "#{m%s:%s%s%s,#{window_name}}",
+		    suffix, star, s, star);
+	} else {
+		xasprintf(&filter->string,
+		    "#{m%s:%s%s%s,#{pane_title}}",
+		    suffix, star, s, star);
+	}
+
+	new_args = args_create();
 	if (args_has(args, 'Z'))
-		args_set(new_args, 'Z', NULL);
-	args_set(new_args, 'f', filter);
+		args_set(new_args, 'Z', NULL, 0);
+	args_set(new_args, 'f', filter, 0);
 
 	window_pane_set_mode(wp, NULL, &window_tree_mode, target, new_args);
-
 	args_free(new_args);
-	free(filter);
 
 	return (CMD_RETURN_NORMAL);
 }

cmd-find.c

@@ -582,27 +582,27 @@ cmd_find_get_pane_with_window(struct cmd_find_state *fs, const char *pane)
 
 	/* Try special characters. */
 	if (strcmp(pane, "!") == 0) {
-		fs->wp = fs->w->last;
+		fs->wp = TAILQ_FIRST(&fs->w->last_panes);
 		if (fs->wp == NULL)
 			return (-1);
 		return (0);
 	} else if (strcmp(pane, "{up-of}") == 0) {
-		fs->wp = window_pane_find_up(fs->current->wp);
+		fs->wp = window_pane_find_up(fs->w->active);
 		if (fs->wp == NULL)
 			return (-1);
 		return (0);
 	} else if (strcmp(pane, "{down-of}") == 0) {
-		fs->wp = window_pane_find_down(fs->current->wp);
+		fs->wp = window_pane_find_down(fs->w->active);
 		if (fs->wp == NULL)
 			return (-1);
 		return (0);
 	} else if (strcmp(pane, "{left-of}") == 0) {
-		fs->wp = window_pane_find_left(fs->current->wp);
+		fs->wp = window_pane_find_left(fs->w->active);
 		if (fs->wp == NULL)
 			return (-1);
 		return (0);
 	} else if (strcmp(pane, "{right-of}") == 0) {
-		fs->wp = window_pane_find_right(fs->current->wp);
+		fs->wp = window_pane_find_right(fs->w->active);
 		if (fs->wp == NULL)
 			return (-1);
 		return (0);
@@ -614,7 +614,7 @@ cmd_find_get_pane_with_window(struct cmd_find_state *fs, const char *pane)
 			n = strtonum(pane + 1, 1, INT_MAX, NULL);
 		else
 			n = 1;
-		wp = fs->current->wp;
+		wp = fs->w->active;
 		if (pane[0] == '+')
 			fs->wp = window_pane_next_by_number(fs->w, wp, n);
 		else

cmd-if-shell.c

@@ -20,6 +20,7 @@
 #include <sys/types.h>
 #include <sys/wait.h>
 
+#include <ctype.h>
 #include <stdlib.h>
 #include <string.h>
 
@@ -29,16 +30,19 @@
  * Executes a tmux command if a shell command returns true or false.
  */
 
-static enum cmd_retval	cmd_if_shell_exec(struct cmd *, struct cmdq_item *);
+static enum args_parse_type	cmd_if_shell_args_parse(struct args *, u_int,
+				    char **);
+static enum cmd_retval		cmd_if_shell_exec(struct cmd *,
+				    struct cmdq_item *);
 
-static void		cmd_if_shell_callback(struct job *);
-static void		cmd_if_shell_free(void *);
+static void	cmd_if_shell_callback(struct job *);
+static void	cmd_if_shell_free(void *);
 
 const struct cmd_entry cmd_if_shell_entry = {
 	.name = "if-shell",
 	.alias = "if",
 
-	.args = { "bFt:", 2, 3 },
+	.args = { "bFt:", 2, 3, cmd_if_shell_args_parse },
 	.usage = "[-bF] " CMD_TARGET_PANE_USAGE " shell-command command "
 		 "[command]",
 
@@ -49,86 +53,72 @@ const struct cmd_entry cmd_if_shell_entry = {
 };
 
 struct cmd_if_shell_data {
-	struct cmd_parse_input	 input;
+	struct args_command_state	*cmd_if;
+	struct args_command_state	*cmd_else;
 
-	char			*cmd_if;
-	char			*cmd_else;
-
-	struct client		*client;
-	struct cmdq_item	*item;
+	struct client			*client;
+	struct cmdq_item		*item;
 };
 
+static enum args_parse_type
+cmd_if_shell_args_parse(__unused struct args *args, u_int idx,
+    __unused char **cause)
+{
+	if (idx == 1 || idx == 2)
+		return (ARGS_PARSE_COMMANDS_OR_STRING);
+	return (ARGS_PARSE_STRING);
+}
+
 static enum cmd_retval
 cmd_if_shell_exec(struct cmd *self, struct cmdq_item *item)
 {
 	struct args			*args = cmd_get_args(self);
 	struct cmd_find_state		*target = cmdq_get_target(item);
-	struct cmdq_state		*state = cmdq_get_state(item);
 	struct cmd_if_shell_data	*cdata;
-	char				*shellcmd, *cmd, *error;
-	const char			*file;
+	struct cmdq_item		*new_item;
+	char				*shellcmd;
 	struct client			*tc = cmdq_get_target_client(item);
 	struct session			*s = target->s;
-	struct cmd_parse_input		 pi;
-	enum cmd_parse_status		 status;
+	struct cmd_list			*cmdlist;
+	u_int				 count = args_count(args);
+	int				 wait = !args_has(args, 'b');
 
-	shellcmd = format_single_from_target(item, args->argv[0]);
+	shellcmd = format_single_from_target(item, args_string(args, 0));
 	if (args_has(args, 'F')) {
 		if (*shellcmd != '0' && *shellcmd != '\0')
-			cmd = args->argv[1];
-		else if (args->argc == 3)
-			cmd = args->argv[2];
-		else
-			cmd = NULL;
-		free(shellcmd);
-		if (cmd == NULL)
+			cmdlist = args_make_commands_now(self, item, 1, 0);
+		else if (count == 3)
+			cmdlist = args_make_commands_now(self, item, 2, 0);
+		else {
+			free(shellcmd);
 			return (CMD_RETURN_NORMAL);
-
-		memset(&pi, 0, sizeof pi);
-		cmd_get_source(self, &pi.file, &pi.line);
-		pi.item = item;
-		pi.c = tc;
-		cmd_find_copy_state(&pi.fs, target);
-
-		status = cmd_parse_and_insert(cmd, &pi, item, state, &error);
-		if (status == CMD_PARSE_ERROR) {
-			cmdq_error(item, "%s", error);
-			free(error);
-			return (CMD_RETURN_ERROR);
 		}
+		free(shellcmd);
+		if (cmdlist == NULL)
+			return (CMD_RETURN_ERROR);
+		new_item = cmdq_get_command(cmdlist, cmdq_get_state(item));
+		cmdq_insert_after(item, new_item);
 		return (CMD_RETURN_NORMAL);
 	}
 
 	cdata = xcalloc(1, sizeof *cdata);
 
-	cdata->cmd_if = xstrdup(args->argv[1]);
-	if (args->argc == 3)
-		cdata->cmd_else = xstrdup(args->argv[2]);
-	else
-		cdata->cmd_else = NULL;
+	cdata->cmd_if = args_make_commands_prepare(self, item, 1, NULL, wait,
+	    0);
+	if (count == 3) {
+		cdata->cmd_else = args_make_commands_prepare(self, item, 2,
+		    NULL, wait, 0);
+	}
 
-	if (!args_has(args, 'b'))
+	if (wait) {
 		cdata->client = cmdq_get_client(item);
-	else
+		cdata->item = item;
+	} else
 		cdata->client = tc;
 	if (cdata->client != NULL)
 		cdata->client->references++;
 
-	if (!args_has(args, 'b'))
-		cdata->item = item;
-	else
-		cdata->item = NULL;
-
-	memset(&cdata->input, 0, sizeof cdata->input);
-	cmd_get_source(self, &file, &cdata->input.line);
-	if (file != NULL)
-		cdata->input.file = xstrdup(file);
-	cdata->input.c = tc;
-	if (cdata->input.c != NULL)
-		cdata->input.c->references++;
-	cmd_find_copy_state(&cdata->input.fs, target);
-
-	if (job_run(shellcmd, 0, NULL, s,
+	if (job_run(shellcmd, 0, NULL, NULL, s,
 	    server_client_get_cwd(cmdq_get_client(item), s), NULL,
 	    cmd_if_shell_callback, cmd_if_shell_free, cdata, 0, -1,
 	    -1) == NULL) {
@@ -139,7 +129,7 @@ cmd_if_shell_exec(struct cmd *self, struct cmdq_item *item)
 	}
 	free(shellcmd);
 
-	if (args_has(args, 'b'))
+	if (!wait)
 		return (CMD_RETURN_NORMAL);
 	return (CMD_RETURN_WAIT);
 }
@@ -149,45 +139,34 @@ cmd_if_shell_callback(struct job *job)
 {
 	struct cmd_if_shell_data	*cdata = job_get_data(job);
 	struct client			*c = cdata->client;
-	struct cmdq_item		*new_item = NULL;
-	struct cmdq_state		*new_state = NULL;
-	char				*cmd;
+	struct cmdq_item		*item = cdata->item, *new_item;
+	struct args_command_state	*state;
+	struct cmd_list			*cmdlist;
+	char				*error;
 	int				 status;
-	struct cmd_parse_result		*pr;
 
 	status = job_get_status(job);
 	if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
-		cmd = cdata->cmd_else;
+		state = cdata->cmd_else;
 	else
-		cmd = cdata->cmd_if;
-	if (cmd == NULL)
+		state = cdata->cmd_if;
+	if (state == NULL)
 		goto out;
 
-	pr = cmd_parse_from_string(cmd, &cdata->input);
-	switch (pr->status) {
-	case CMD_PARSE_EMPTY:
-		break;
-	case CMD_PARSE_ERROR:
-		if (cdata->item != NULL)
-		       cmdq_error(cdata->item, "%s", pr->error);
-		free(pr->error);
-		break;
-	case CMD_PARSE_SUCCESS:
-		if (cdata->item == NULL)
-			new_state = cmdq_new_state(NULL, NULL, 0);
-		else
-			new_state = cmdq_get_state(cdata->item);
-		new_item = cmdq_get_command(pr->cmdlist, new_state);
-		if (cdata->item == NULL)
-			cmdq_free_state(new_state);
-		cmd_list_free(pr->cmdlist);
-		break;
-	}
-	if (new_item != NULL) {
-		if (cdata->item == NULL)
-			cmdq_append(c, new_item);
-		else
-			cmdq_insert_after(cdata->item, new_item);
+	cmdlist = args_make_commands(state, 0, NULL, &error);
+	if (cmdlist == NULL) {
+		if (cdata->item == NULL) {
+			*error = toupper((u_char)*error);
+			status_message_set(c, -1, 1, 0, 0, "%s", error);
+		} else
+			cmdq_error(cdata->item, "%s", error);
+		free(error);
+	} else if (item == NULL) {
+		new_item = cmdq_get_command(cmdlist, NULL);
+		cmdq_append(c, new_item);
+	} else {
+		new_item = cmdq_get_command(cmdlist, cmdq_get_state(item));
+		cmdq_insert_after(item, new_item);
 	}
 
 out:
@@ -203,12 +182,9 @@ cmd_if_shell_free(void *data)
 	if (cdata->client != NULL)
 		server_client_unref(cdata->client);
 
-	free(cdata->cmd_else);
-	free(cdata->cmd_if);
-
-	if (cdata->input.c != NULL)
-		server_client_unref(cdata->input.c);
-	free((void *)cdata->input.file);
+	if (cdata->cmd_else != NULL)
+		args_make_commands_free(cdata->cmd_else);
+	args_make_commands_free(cdata->cmd_if);
 
 	free(cdata);
 }

cmd-join-pane.c

@@ -35,7 +35,7 @@ const struct cmd_entry cmd_join_pane_entry = {
 	.name = "join-pane",
 	.alias = "joinp",
 
-	.args = { "bdfhvp:l:s:t:", 0, 0 },
+	.args = { "bdfhvp:l:s:t:", 0, 0, NULL },
 	.usage = "[-bdfhv] [-l size] " CMD_SRCDST_PANE_USAGE,
 
 	.source = { 's', CMD_FIND_PANE, CMD_FIND_DEFAULT_MARKED },
@@ -49,7 +49,7 @@ const struct cmd_entry cmd_move_pane_entry = {
 	.name = "move-pane",
 	.alias = "movep",
 
-	.args = { "bdfhvp:l:s:t:", 0, 0 },
+	.args = { "bdfhvp:l:s:t:", 0, 0, NULL },
 	.usage = "[-bdfhv] [-l size] " CMD_SRCDST_PANE_USAGE,
 
 	.source = { 's', CMD_FIND_PANE, CMD_FIND_DEFAULT_MARKED },
@@ -71,10 +71,11 @@ cmd_join_pane_exec(struct cmd *self, struct cmdq_item *item)
 	struct window		*src_w, *dst_w;
 	struct window_pane	*src_wp, *dst_wp;
 	char			*cause = NULL;
-	int			 size, percentage, dst_idx;
+	int			 size, dst_idx;
 	int			 flags;
 	enum layout_type	 type;
 	struct layout_cell	*lc;
+	u_int			 curval = 0;
 
 	dst_s = target->s;
 	dst_wl = target->wl;
@@ -97,23 +98,30 @@ cmd_join_pane_exec(struct cmd *self, struct cmdq_item *item)
 	if (args_has(args, 'h'))
 		type = LAYOUT_LEFTRIGHT;
 
+	/* If the 'p' flag is dropped then this bit can be moved into 'l'. */
+	if (args_has(args, 'l') || args_has(args, 'p')) {
+		if (args_has(args, 'f')) {
+			if (type == LAYOUT_TOPBOTTOM)
+				curval = dst_w->sy;
+			else
+				curval = dst_w->sx;
+		} else {
+			if (type == LAYOUT_TOPBOTTOM)
+				curval = dst_wp->sy;
+			else
+				curval = dst_wp->sx;
+		}
+	}
+
 	size = -1;
 	if (args_has(args, 'l')) {
-		if (type == LAYOUT_TOPBOTTOM) {
-			size = args_percentage(args, 'l', 0, INT_MAX,
-			    dst_wp->sy, &cause);
-		} else {
-			size = args_percentage(args, 'l', 0, INT_MAX,
-			    dst_wp->sx, &cause);
-		}
+		size = args_percentage_and_expand(args, 'l', 0, INT_MAX, curval,
+			   item, &cause);
 	} else if (args_has(args, 'p')) {
-		percentage = args_strtonum(args, 'p', 0, 100, &cause);
-		if (cause == NULL) {
-			if (type == LAYOUT_TOPBOTTOM)
-				size = (dst_wp->sy * percentage) / 100;
-			else
-				size = (dst_wp->sx * percentage) / 100;
-		}
+		size = args_strtonum_and_expand(args, 'l', 0, 100, item,
+			   &cause);
+		if (cause == NULL)
+			size = curval * size / 100;
 	}
 	if (cause != NULL) {
 		cmdq_error(item, "size %s", cause);
@@ -141,12 +149,13 @@ cmd_join_pane_exec(struct cmd *self, struct cmdq_item *item)
 
 	src_wp->window = dst_w;
 	options_set_parent(src_wp->options, dst_w->options);
-	src_wp->flags |= PANE_STYLECHANGED;
+	src_wp->flags |= (PANE_STYLECHANGED|PANE_THEMECHANGED);
 	if (flags & SPAWN_BEFORE)
 		TAILQ_INSERT_BEFORE(dst_wp, src_wp, entry);
 	else
 		TAILQ_INSERT_AFTER(&dst_w->panes, dst_wp, src_wp, entry);
 	layout_assign_pane(lc, src_wp, 0);
+	colour_palette_from_option(&src_wp->palette, src_wp->options);
 
 	recalculate_sizes();
 

cmd-kill-pane.c

@@ -32,7 +32,7 @@ const struct cmd_entry cmd_kill_pane_entry = {
 	.name = "kill-pane",
 	.alias = "killp",
 
-	.args = { "at:", 0, 0 },
+	.args = { "at:", 0, 0, NULL },
 	.usage = "[-a] " CMD_TARGET_PANE_USAGE,
 
 	.target = { 't', CMD_FIND_PANE, 0 },

cmd-kill-server.c

@@ -33,7 +33,7 @@ const struct cmd_entry cmd_kill_server_entry = {
 	.name = "kill-server",
 	.alias = NULL,
 
-	.args = { "", 0, 0 },
+	.args = { "", 0, 0, NULL },
 	.usage = "",
 
 	.flags = 0,
@@ -44,7 +44,7 @@ const struct cmd_entry cmd_start_server_entry = {
 	.name = "start-server",
 	.alias = "start",
 
-	.args = { "", 0, 0 },
+	.args = { "", 0, 0, NULL },
 	.usage = "",
 
 	.flags = CMD_STARTSERVER,

cmd-kill-session.c

@@ -33,7 +33,7 @@ const struct cmd_entry cmd_kill_session_entry = {
 	.name = "kill-session",
 	.alias = NULL,
 
-	.args = { "aCt:", 0, 0 },
+	.args = { "aCt:", 0, 0, NULL },
 	.usage = "[-aC] " CMD_TARGET_SESSION_USAGE,
 
 	.target = { 't', CMD_FIND_SESSION, 0 },

cmd-kill-window.c

@@ -30,7 +30,7 @@ const struct cmd_entry cmd_kill_window_entry = {
 	.name = "kill-window",
 	.alias = "killw",
 
-	.args = { "at:", 0, 0 },
+	.args = { "at:", 0, 0, NULL },
 	.usage = "[-a] " CMD_TARGET_WINDOW_USAGE,
 
 	.target = { 't', CMD_FIND_WINDOW, 0 },
@@ -43,7 +43,7 @@ const struct cmd_entry cmd_unlink_window_entry = {
 	.name = "unlink-window",
 	.alias = "unlinkw",
 
-	.args = { "kt:", 0, 0 },
+	.args = { "kt:", 0, 0, NULL },
 	.usage = "[-k] " CMD_TARGET_WINDOW_USAGE,
 
 	.target = { 't', CMD_FIND_WINDOW, 0 },

cmd-list-buffers.c

@@ -36,7 +36,7 @@ const struct cmd_entry cmd_list_buffers_entry = {
 	.name = "list-buffers",
 	.alias = "lsb",
 
-	.args = { "F:f:", 0, 0 },
+	.args = { "F:f:", 0, 0, NULL },
 	.usage = "[-F format] [-f filter]",
 
 	.flags = CMD_AFTERHOOK,

cmd-list-clients.c

@@ -31,6 +31,8 @@
 #define LIST_CLIENTS_TEMPLATE						\
 	"#{client_name}: #{session_name} "				\
 	"[#{client_width}x#{client_height} #{client_termname}] "	\
+	"#{?#{!=:#{client_uid},#{uid}},"				\
+	"[user #{?client_user,#{client_user},#{client_uid},}] ,}"	\
 	"#{?client_flags,(,}#{client_flags}#{?client_flags,),}"
 
 static enum cmd_retval	cmd_list_clients_exec(struct cmd *, struct cmdq_item *);
@@ -39,8 +41,8 @@ const struct cmd_entry cmd_list_clients_entry = {
 	.name = "list-clients",
 	.alias = "lsc",
 
-	.args = { "F:t:", 0, 0 },
-	.usage = "[-F format] " CMD_TARGET_SESSION_USAGE,
+	.args = { "F:f:t:", 0, 0, NULL },
+	.usage = "[-F format] [-f filter] " CMD_TARGET_SESSION_USAGE,
 
 	.target = { 't', CMD_FIND_SESSION, 0 },
 
@@ -56,9 +58,10 @@ cmd_list_clients_exec(struct cmd *self, struct cmdq_item *item)
 	struct client		*c;
 	struct session		*s;
 	struct format_tree	*ft;
-	const char		*template;
+	const char		*template, *filter;
 	u_int			 idx;
-	char			*line;
+	char			*line, *expanded;
+	int			 flag;
 
 	if (args_has(args, 't'))
 		s = target->s;
@@ -67,6 +70,7 @@ cmd_list_clients_exec(struct cmd *self, struct cmdq_item *item)
 
 	if ((template = args_get(args, 'F')) == NULL)
 		template = LIST_CLIENTS_TEMPLATE;
+	filter = args_get(args, 'f');
 
 	idx = 0;
 	TAILQ_FOREACH(c, &clients, entry) {
@@ -77,9 +81,17 @@ cmd_list_clients_exec(struct cmd *self, struct cmdq_item *item)
 		format_add(ft, "line", "%u", idx);
 		format_defaults(ft, c, NULL, NULL, NULL);
 
-		line = format_expand(ft, template);
-		cmdq_print(item, "%s", line);
-		free(line);
+		if (filter != NULL) {
+			expanded = format_expand(ft, filter);
+			flag = format_true(expanded);
+			free(expanded);
+		} else
+			flag = 1;
+		if (flag) {
+			line = format_expand(ft, template);
+			cmdq_print(item, "%s", line);
+			free(line);
+		}
 
 		format_free(ft);
 

cmd-list-keys.c

@@ -36,7 +36,7 @@ const struct cmd_entry cmd_list_keys_entry = {
 	.name = "list-keys",
 	.alias = "lsk",
 
-	.args = { "1aNP:T:", 0, 1 },
+	.args = { "1aNP:T:", 0, 1, NULL },
 	.usage = "[-1aN] [-P prefix-string] [-T key-table] [key]",
 
 	.flags = CMD_STARTSERVER|CMD_AFTERHOOK,
@@ -47,7 +47,7 @@ const struct cmd_entry cmd_list_commands_entry = {
 	.name = "list-commands",
 	.alias = "lscm",
 
-	.args = { "F:", 0, 1 },
+	.args = { "F:", 0, 1, NULL },
 	.usage = "[-F format] [command]",
 
 	.flags = CMD_STARTSERVER|CMD_AFTERHOOK,
@@ -91,7 +91,7 @@ cmd_list_keys_print_notes(struct cmdq_item *item, struct args *args,
 	struct key_binding	*bd;
 	const char		*key;
 	char			*tmp, *note;
-	int	                 found = 0;
+	int			 found = 0;
 
 	table = key_bindings_get_table(tablename, 0);
 	if (table == NULL)
@@ -114,8 +114,8 @@ cmd_list_keys_print_notes(struct cmdq_item *item, struct args *args,
 			note = xstrdup(bd->note);
 		tmp = utf8_padcstr(key, keywidth + 1);
 		if (args_has(args, '1') && tc != NULL) {
-			status_message_set(tc, -1, 1, 0, "%s%s%s", prefix, tmp,
-			    note);
+			status_message_set(tc, -1, 1, 0, 0, "%s%s%s", prefix,
+			    tmp, note);
 		} else
 			cmdq_print(item, "%s%s%s", prefix, tmp, note);
 		free(tmp);
@@ -148,9 +148,10 @@ static enum cmd_retval
 cmd_list_keys_exec(struct cmd *self, struct cmdq_item *item)
 {
 	struct args		*args = cmd_get_args(self);
+	struct client		*tc = cmdq_get_target_client(item);
 	struct key_table	*table;
 	struct key_binding	*bd;
-	const char		*tablename, *r;
+	const char		*tablename, *r, *keystr;
 	char			*key, *cp, *tmp, *start, *empty;
 	key_code		 prefix, only = KEYC_UNKNOWN;
 	int			 repeat, width, tablewidth, keywidth, found = 0;
@@ -159,13 +160,13 @@ cmd_list_keys_exec(struct cmd *self, struct cmdq_item *item)
 	if (cmd_get_entry(self) == &cmd_list_commands_entry)
 		return (cmd_list_keys_commands(self, item));
 
-	if (args->argc != 0) {
-		only = key_string_lookup_string(args->argv[0]);
+	if ((keystr = args_string(args, 0)) != NULL) {
+		only = key_string_lookup_string(keystr);
 		if (only == KEYC_UNKNOWN) {
-			cmdq_error(item, "invalid key: %s", args->argv[0]);
+			cmdq_error(item, "invalid key: %s", keystr);
 			return (CMD_RETURN_ERROR);
 		}
-		only &= KEYC_MASK_KEY;
+		only &= (KEYC_MASK_KEY|KEYC_MASK_MODIFIERS);
 	}
 
 	tablename = args_get(args, 'T');
@@ -211,7 +212,7 @@ cmd_list_keys_exec(struct cmd *self, struct cmdq_item *item)
 
 	repeat = 0;
 	tablewidth = keywidth = 0;
-	table = key_bindings_first_table ();
+	table = key_bindings_first_table();
 	while (table != NULL) {
 		if (tablename != NULL && strcmp(table->name, tablename) != 0) {
 			table = key_bindings_next_table(table);
@@ -244,7 +245,7 @@ cmd_list_keys_exec(struct cmd *self, struct cmdq_item *item)
 	tmpsize = 256;
 	tmp = xmalloc(tmpsize);
 
-	table = key_bindings_first_table ();
+	table = key_bindings_first_table();
 	while (table != NULL) {
 		if (tablename != NULL && strcmp(table->name, tablename) != 0) {
 			table = key_bindings_next_table(table);
@@ -296,9 +297,15 @@ cmd_list_keys_exec(struct cmd *self, struct cmdq_item *item)
 			strlcat(tmp, cp, tmpsize);
 			free(cp);
 
-			cmdq_print(item, "bind-key %s", tmp);
-
+			if (args_has(args, '1') && tc != NULL) {
+				status_message_set(tc, -1, 1, 0, 0,
+				    "bind-key %s", tmp);
+			} else
+				cmdq_print(item, "bind-key %s", tmp);
 			free(key);
+
+			if (args_has(args, '1'))
+				break;
 			bd = key_bindings_next(table, bd);
 		}
 		table = key_bindings_next_table(table);
@@ -308,12 +315,37 @@ cmd_list_keys_exec(struct cmd *self, struct cmdq_item *item)
 
 out:
 	if (only != KEYC_UNKNOWN && !found) {
-		cmdq_error(item, "unknown key: %s", args->argv[0]);
+		cmdq_error(item, "unknown key: %s", args_string(args, 0));
 		return (CMD_RETURN_ERROR);
 	}
 	return (CMD_RETURN_NORMAL);
 }
 
+static void
+cmd_list_single_command(const struct cmd_entry *entry, struct format_tree *ft,
+    const char *template, struct cmdq_item *item)
+{
+	const char	*s;
+	char		*line;
+
+	format_add(ft, "command_list_name", "%s", entry->name);
+	if (entry->alias != NULL)
+		s = entry->alias;
+	else
+		s = "";
+	format_add(ft, "command_list_alias", "%s", s);
+	if (entry->usage != NULL)
+		s = entry->usage;
+	else
+		s = "";
+	format_add(ft, "command_list_usage", "%s", s);
+
+	line = format_expand(ft, template);
+	if (*line != '\0')
+		cmdq_print(item, "%s", line);
+	free(line);
+}
+
 static enum cmd_retval
 cmd_list_keys_commands(struct cmd *self, struct cmdq_item *item)
 {
@@ -321,11 +353,8 @@ cmd_list_keys_commands(struct cmd *self, struct cmdq_item *item)
 	const struct cmd_entry	**entryp;
 	const struct cmd_entry	 *entry;
 	struct format_tree	 *ft;
-	const char		 *template, *s, *command = NULL;
-	char			 *line;
-
-	if (args->argc != 0)
-		command = args->argv[0];
+	const char		 *template,  *command;
+	char			 *cause;
 
 	if ((template = args_get(args, 'F')) == NULL) {
 		template = "#{command_list_name}"
@@ -336,30 +365,20 @@ cmd_list_keys_commands(struct cmd *self, struct cmdq_item *item)
 	ft = format_create(cmdq_get_client(item), item, FORMAT_NONE, 0);
 	format_defaults(ft, NULL, NULL, NULL, NULL);
 
-	for (entryp = cmd_table; *entryp != NULL; entryp++) {
-		entry = *entryp;
-		if (command != NULL &&
-		    (strcmp(entry->name, command) != 0 &&
-		    (entry->alias == NULL ||
-		    strcmp(entry->alias, command) != 0)))
-		    continue;
-
-		format_add(ft, "command_list_name", "%s", entry->name);
-		if (entry->alias != NULL)
-			s = entry->alias;
-		else
-			s = "";
-		format_add(ft, "command_list_alias", "%s", s);
-		if (entry->usage != NULL)
-			s = entry->usage;
-		else
-			s = "";
-		format_add(ft, "command_list_usage", "%s", s);
-
-		line = format_expand(ft, template);
-		if (*line != '\0')
-			cmdq_print(item, "%s", line);
-		free(line);
+	command = args_string(args, 0);
+	if (command == NULL) {
+		for (entryp = cmd_table; *entryp != NULL; entryp++)
+			cmd_list_single_command(*entryp, ft, template, item);
+	} else {
+		entry = cmd_find(command, &cause);
+		if (entry != NULL)
+			cmd_list_single_command(entry, ft, template, item);
+		else {
+			cmdq_error(item, "%s", cause);
+			free(cause);
+			format_free(ft);
+			return (CMD_RETURN_ERROR);
+		}
 	}
 
 	format_free(ft);

cmd-list-panes.c

@@ -38,7 +38,7 @@ const struct cmd_entry cmd_list_panes_entry = {
 	.name = "list-panes",
 	.alias = "lsp",
 
-	.args = { "asF:f:t:", 0, 0 },
+	.args = { "asF:f:t:", 0, 0, NULL },
 	.usage = "[-as] [-F format] [-f filter] " CMD_TARGET_WINDOW_USAGE,
 
 	.target = { 't', CMD_FIND_WINDOW, 0 },

cmd-list-sessions.c

@@ -42,7 +42,7 @@ const struct cmd_entry cmd_list_sessions_entry = {
 	.name = "list-sessions",
 	.alias = "ls",
 
-	.args = { "F:f:", 0, 0 },
+	.args = { "F:f:", 0, 0, NULL },
 	.usage = "[-F format] [-f filter]",
 
 	.flags = CMD_AFTERHOOK,

cmd-list-windows.c

@@ -49,7 +49,7 @@ const struct cmd_entry cmd_list_windows_entry = {
 	.name = "list-windows",
 	.alias = "lsw",
 
-	.args = { "F:f:at:", 0, 0 },
+	.args = { "F:f:at:", 0, 0, NULL },
 	.usage = "[-a] [-F format] [-f filter] " CMD_TARGET_SESSION_USAGE,
 
 	.target = { 't', CMD_FIND_SESSION, 0 },

cmd-load-buffer.c

@@ -37,7 +37,7 @@ const struct cmd_entry cmd_load_buffer_entry = {
 	.name = "load-buffer",
 	.alias = "loadb",
 
-	.args = { "b:t:w", 1, 1 },
+	.args = { "b:t:w", 1, 1, NULL },
 	.usage = CMD_BUFFER_USAGE " " CMD_TARGET_CLIENT_USAGE " path",
 
 	.flags = CMD_AFTERHOOK|CMD_CLIENT_TFLAG|CMD_CLIENT_CANFAIL,
@@ -77,7 +77,7 @@ cmd_load_buffer_done(__unused struct client *c, const char *path, int error,
 		} else if (tc != NULL &&
 		    tc->session != NULL &&
 		    (~tc->flags & CLIENT_DEAD))
-			tty_set_selection(&tc->tty, copy, bsize);
+			tty_set_selection(&tc->tty, "", copy, bsize);
 		if (tc != NULL)
 			server_client_unref(tc);
 	}
@@ -105,7 +105,7 @@ cmd_load_buffer_exec(struct cmd *self, struct cmdq_item *item)
 		cdata->client->references++;
 	}
 
-	path = format_single_from_target(item, args->argv[0]);
+	path = format_single_from_target(item, args_string(args, 0));
 	file_read(cmdq_get_client(item), path, cmd_load_buffer_done, cdata);
 	free(path);
 

cmd-lock-server.c

@@ -30,7 +30,7 @@ const struct cmd_entry cmd_lock_server_entry = {
 	.name = "lock-server",
 	.alias = "lock",
 
-	.args = { "", 0, 0 },
+	.args = { "", 0, 0, NULL },
 	.usage = "",
 
 	.flags = CMD_AFTERHOOK,
@@ -41,7 +41,7 @@ const struct cmd_entry cmd_lock_session_entry = {
 	.name = "lock-session",
 	.alias = "locks",
 
-	.args = { "t:", 0, 0 },
+	.args = { "t:", 0, 0, NULL },
 	.usage = CMD_TARGET_SESSION_USAGE,
 
 	.target = { 't', CMD_FIND_SESSION, 0 },
@@ -54,7 +54,7 @@ const struct cmd_entry cmd_lock_client_entry = {
 	.name = "lock-client",
 	.alias = "lockc",
 
-	.args = { "t:", 0, 0 },
+	.args = { "t:", 0, 0, NULL },
 	.usage = CMD_TARGET_CLIENT_USAGE,
 
 	.flags = CMD_AFTERHOOK|CMD_CLIENT_TFLAG,

cmd-move-window.c

@@ -32,7 +32,7 @@ const struct cmd_entry cmd_move_window_entry = {
 	.name = "move-window",
 	.alias = "movew",
 
-	.args = { "abdkrs:t:", 0, 0 },
+	.args = { "abdkrs:t:", 0, 0, NULL },
 	.usage = "[-abdkr] " CMD_SRCDST_WINDOW_USAGE,
 
 	.source = { 's', CMD_FIND_WINDOW, 0 },
@@ -46,7 +46,7 @@ const struct cmd_entry cmd_link_window_entry = {
 	.name = "link-window",
 	.alias = "linkw",
 
-	.args = { "abdks:t:", 0, 0 },
+	.args = { "abdks:t:", 0, 0, NULL },
 	.usage = "[-abdk] " CMD_SRCDST_WINDOW_USAGE,
 
 	.source = { 's', CMD_FIND_WINDOW, 0 },

cmd-new-session.c

@@ -39,10 +39,11 @@ const struct cmd_entry cmd_new_session_entry = {
 	.name = "new-session",
 	.alias = "new",
 
-	.args = { "Ac:dDe:EF:f:n:Ps:t:x:Xy:", 0, -1 },
+	.args = { "Ac:dDe:EF:f:n:Ps:t:x:Xy:", 0, -1, NULL },
 	.usage = "[-AdDEPX] [-c start-directory] [-e environment] [-F format] "
 		 "[-f flags] [-n window-name] [-s session-name] "
-		 CMD_TARGET_SESSION_USAGE " [-x width] [-y height] [command]",
+		 CMD_TARGET_SESSION_USAGE " [-x width] [-y height] "
+		 "[shell-command [argument ...]]",
 
 	.target = { 't', CMD_FIND_SESSION, CMD_FIND_CANFAIL },
 
@@ -54,7 +55,7 @@ const struct cmd_entry cmd_has_session_entry = {
 	.name = "has-session",
 	.alias = "has",
 
-	.args = { "t:", 0, 0 },
+	.args = { "t:", 0, 0, NULL },
 	.usage = CMD_TARGET_SESSION_USAGE,
 
 	.target = { 't', CMD_FIND_SESSION, 0 },
@@ -75,15 +76,15 @@ cmd_new_session_exec(struct cmd *self, struct cmdq_item *item)
 	struct options		*oo;
 	struct termios		 tio, *tiop;
 	struct session_group	*sg = NULL;
-	const char		*errstr, *template, *group, *tmp, *add;
+	const char		*errstr, *template, *group, *tmp;
 	char			*cause, *cwd = NULL, *cp, *newname = NULL;
 	char			*name, *prefix = NULL;
 	int			 detached, already_attached, is_control = 0;
-	u_int			 sx, sy, dsx, dsy;
-	struct spawn_context	 sc;
+	u_int			 sx, sy, dsx, dsy, count = args_count(args);
+	struct spawn_context	 sc = { 0 };
 	enum cmd_retval		 retval;
 	struct cmd_find_state    fs;
-	struct args_value	*value;
+	struct args_value	*av;
 
 	if (cmd_get_entry(self) == &cmd_has_session_entry) {
 		/*
@@ -93,7 +94,7 @@ cmd_new_session_exec(struct cmd *self, struct cmdq_item *item)
 		return (CMD_RETURN_NORMAL);
 	}
 
-	if (args_has(args, 't') && (args->argc != 0 || args_has(args, 'n'))) {
+	if (args_has(args, 't') && (count != 0 || args_has(args, 'n'))) {
 		cmdq_error(item, "command or window name given with target");
 		return (CMD_RETURN_ERROR);
 	}
@@ -102,6 +103,11 @@ cmd_new_session_exec(struct cmd *self, struct cmdq_item *item)
 	if (tmp != NULL) {
 		name = format_single(item, tmp, c, NULL, NULL, NULL);
 		newname = session_check_name(name);
+		if (newname == NULL) {
+			cmdq_error(item, "invalid session: %s", name);
+			free(name);
+			return (CMD_RETURN_ERROR);
+		}
 		free(name);
 	}
 	if (args_has(args, 'A')) {
@@ -134,8 +140,14 @@ cmd_new_session_exec(struct cmd *self, struct cmdq_item *item)
 			prefix = xstrdup(sg->name);
 		else if (groupwith != NULL)
 			prefix = xstrdup(groupwith->name);
-		else
+		else {
 			prefix = session_check_name(group);
+			if (prefix == NULL) {
+				cmdq_error(item, "invalid session group: %s",
+				    group);
+				goto fail;
+			}
+		}
 	}
 
 	/* Set -d if no client. */
@@ -258,21 +270,21 @@ cmd_new_session_exec(struct cmd *self, struct cmdq_item *item)
 	env = environ_create();
 	if (c != NULL && !args_has(args, 'E'))
 		environ_update(global_s_options, c->environ, env);
-	add = args_first_value(args, 'e', &value);
-	while (add != NULL) {
-		environ_put(env, add, 0);
-		add = args_next_value(&value);
+	av = args_first_value(args, 'e');
+	while (av != NULL) {
+		environ_put(env, av->string, 0);
+		av = args_next_value(av);
 	}
 	s = session_create(prefix, newname, cwd, env, oo, tiop);
 
 	/* Spawn the initial window. */
-	memset(&sc, 0, sizeof sc);
 	sc.item = item;
 	sc.s = s;
+	if (!detached)
+		sc.tc = c;
 
 	sc.name = args_get(args, 'n');
-	sc.argc = args->argc;
-	sc.argv = args->argv;
+	args_to_vector(args, &sc.argc, &sc.argv);
 
 	sc.idx = -1;
 	sc.cwd = args_get(args, 'c');
@@ -316,25 +328,10 @@ cmd_new_session_exec(struct cmd *self, struct cmdq_item *item)
 				proc_send(c->peer, MSG_READY, -1, NULL, 0);
 		} else if (c->session != NULL)
 			c->last_session = c->session;
-		c->session = s;
+		server_client_set_session(c, s);
 		if (~cmdq_get_flags(item) & CMDQ_STATE_REPEAT)
 			server_client_set_key_table(c, NULL);
-		tty_update_client_offset(c);
-		status_timer_start(c);
-		notify_client("client-session-changed", c);
-		session_update_activity(s, NULL);
-		gettimeofday(&s->last_attached_time, NULL);
-		server_redraw_client(c);
 	}
-	recalculate_sizes();
-	server_update_socket();
-
-	/*
-	 * If there are still configuration file errors to display, put the new
-	 * session's current window into more mode and display them now.
-	 */
-	if (cfg_finished)
-		cfg_show_causes(s);
 
 	/* Print if requested. */
 	if (args_has(args, 'P')) {
@@ -353,12 +350,19 @@ cmd_new_session_exec(struct cmd *self, struct cmdq_item *item)
 	cmd_find_from_session(&fs, s, 0);
 	cmdq_insert_hook(s, item, &fs, "after-new-session");
 
+	if (cfg_finished)
+		cfg_show_causes(s);
+
+	if (sc.argv != NULL)
+		cmd_free_argv(sc.argc, sc.argv);
 	free(cwd);
 	free(newname);
 	free(prefix);
 	return (CMD_RETURN_NORMAL);
 
 fail:
+	if (sc.argv != NULL)
+		cmd_free_argv(sc.argc, sc.argv);
 	free(cwd);
 	free(newname);
 	free(prefix);

cmd-new-window.c

@@ -38,9 +38,10 @@ const struct cmd_entry cmd_new_window_entry = {
 	.name = "new-window",
 	.alias = "neww",
 
-	.args = { "abc:de:F:kn:PSt:", 0, -1 },
+	.args = { "abc:de:F:kn:PSt:", 0, -1, NULL },
 	.usage = "[-abdkPS] [-c start-directory] [-e environment] [-F format] "
-		 "[-n window-name] " CMD_TARGET_WINDOW_USAGE " [command]",
+		 "[-n window-name] " CMD_TARGET_WINDOW_USAGE
+		 " [shell-command [argument ...]]",
 
 	.target = { 't', CMD_FIND_WINDOW, CMD_FIND_WINDOW_INDEX },
 
@@ -55,16 +56,15 @@ cmd_new_window_exec(struct cmd *self, struct cmdq_item *item)
 	struct client		*c = cmdq_get_client(item);
 	struct cmd_find_state	*current = cmdq_get_current(item);
 	struct cmd_find_state	*target = cmdq_get_target(item);
-	struct spawn_context	 sc;
+	struct spawn_context	 sc = { 0 };
 	struct client		*tc = cmdq_get_target_client(item);
 	struct session		*s = target->s;
-	struct winlink		*wl = target->wl;
+	struct winlink		*wl = target->wl, *new_wl = NULL;
 	int			 idx = target->idx, before;
-	struct winlink		*new_wl = NULL;
-	char			*cause = NULL, *cp;
-	const char		*template, *add, *name;
+	char			*cause = NULL, *cp, *expanded;
+	const char		*template, *name;
 	struct cmd_find_state	 fs;
-	struct args_value	*value;
+	struct args_value	*av;
 
 	/*
 	 * If -S and -n are given and -t is not and a single window with this
@@ -72,16 +72,19 @@ cmd_new_window_exec(struct cmd *self, struct cmdq_item *item)
 	 */
 	name = args_get(args, 'n');
 	if (args_has(args, 'S') && name != NULL && target->idx == -1) {
+		expanded = format_single(item, name, c, s, NULL, NULL);
 		RB_FOREACH(wl, winlinks, &s->windows) {
-			if (strcmp(wl->window->name, name) != 0)
+			if (strcmp(wl->window->name, expanded) != 0)
 				continue;
 			if (new_wl == NULL) {
 				new_wl = wl;
 				continue;
 			}
 			cmdq_error(item, "multiple windows named %s", name);
+			free(expanded);
 			return (CMD_RETURN_ERROR);
 		}
+		free(expanded);
 		if (new_wl != NULL) {
 			if (args_has(args, 'd'))
 				return (CMD_RETURN_NORMAL);
@@ -94,7 +97,6 @@ cmd_new_window_exec(struct cmd *self, struct cmdq_item *item)
 		}
 	}
 
-
 	before = args_has(args, 'b');
 	if (args_has(args, 'a') || before) {
 		idx = winlink_shuffle_up(s, wl, before);
@@ -102,20 +104,18 @@ cmd_new_window_exec(struct cmd *self, struct cmdq_item *item)
 			idx = target->idx;
 	}
 
-	memset(&sc, 0, sizeof sc);
 	sc.item = item;
 	sc.s = s;
 	sc.tc = tc;
 
 	sc.name = args_get(args, 'n');
-	sc.argc = args->argc;
-	sc.argv = args->argv;
+	args_to_vector(args, &sc.argc, &sc.argv);
 	sc.environ = environ_create();
 
-	add = args_first_value(args, 'e', &value);
-	while (add != NULL) {
-		environ_put(sc.environ, add, 0);
-		add = args_next_value(&value);
+	av = args_first_value(args, 'e');
+	while (av != NULL) {
+		environ_put(sc.environ, av->string, 0);
+		av = args_next_value(av);
 	}
 
 	sc.idx = idx;
@@ -130,6 +130,9 @@ cmd_new_window_exec(struct cmd *self, struct cmdq_item *item)
 	if ((new_wl = spawn_window(&sc, &cause)) == NULL) {
 		cmdq_error(item, "create window failed: %s", cause);
 		free(cause);
+		if (sc.argv != NULL)
+			cmd_free_argv(sc.argc, sc.argv);
+		environ_free(sc.environ);
 		return (CMD_RETURN_ERROR);
 	}
 	if (!args_has(args, 'd') || new_wl == s->curw) {
@@ -150,6 +153,8 @@ cmd_new_window_exec(struct cmd *self, struct cmdq_item *item)
 	cmd_find_from_winlink(&fs, new_wl, 0);
 	cmdq_insert_hook(s, item, &fs, "after-new-window");
 
+	if (sc.argv != NULL)
+		cmd_free_argv(sc.argc, sc.argv);
 	environ_free(sc.environ);
 	return (CMD_RETURN_NORMAL);
 }

cmd-parse.y

@@ -42,13 +42,27 @@ struct cmd_parse_scope {
 	TAILQ_ENTRY (cmd_parse_scope)	 entry;
 };
 
+enum cmd_parse_argument_type {
+	CMD_PARSE_STRING,
+	CMD_PARSE_COMMANDS,
+	CMD_PARSE_PARSED_COMMANDS
+};
+
+struct cmd_parse_argument {
+	enum cmd_parse_argument_type	 type;
+	char				*string;
+	struct cmd_parse_commands	*commands;
+	struct cmd_list			*cmdlist;
+
+	TAILQ_ENTRY(cmd_parse_argument)	 entry;
+};
+TAILQ_HEAD(cmd_parse_arguments, cmd_parse_argument);
+
 struct cmd_parse_command {
-	u_int				  line;
+	u_int				 line;
+	struct cmd_parse_arguments	 arguments;
 
-	int				  argc;
-	char				**argv;
-
-	TAILQ_ENTRY(cmd_parse_command)	  entry;
+	TAILQ_ENTRY(cmd_parse_command)	 entry;
 };
 TAILQ_HEAD(cmd_parse_commands, cmd_parse_command);
 
@@ -77,8 +91,9 @@ static char	*cmd_parse_get_error(const char *, u_int, const char *);
 static void	 cmd_parse_free_command(struct cmd_parse_command *);
 static struct cmd_parse_commands *cmd_parse_new_commands(void);
 static void	 cmd_parse_free_commands(struct cmd_parse_commands *);
-static char	*cmd_parse_commands_to_string(struct cmd_parse_commands *);
-static void	 cmd_parse_print_commands(struct cmd_parse_input *, u_int,
+static void	 cmd_parse_build_commands(struct cmd_parse_commands *,
+		     struct cmd_parse_input *, struct cmd_parse_result *);
+static void	 cmd_parse_print_commands(struct cmd_parse_input *,
 		     struct cmd_list *);
 
 %}
@@ -86,10 +101,8 @@ static void	 cmd_parse_print_commands(struct cmd_parse_input *, u_int,
 %union
 {
 	char					 *token;
-	struct {
-		int				  argc;
-		char				**argv;
-	} arguments;
+	struct cmd_parse_arguments		 *arguments;
+	struct cmd_parse_argument		 *argument;
 	int					  flag;
 	struct {
 		int				  flag;
@@ -107,8 +120,9 @@ static void	 cmd_parse_print_commands(struct cmd_parse_input *, u_int,
 %token ENDIF
 %token <token> FORMAT TOKEN EQUALS
 
-%type <token> argument expanded format
+%type <token> expanded format
 %type <arguments> arguments
+%type <argument> argument
 %type <flag> if_open if_elif
 %type <elif> elif elif1
 %type <commands> argument_statements statements statement
@@ -209,9 +223,16 @@ assignment	: EQUALS
 		{
 			struct cmd_parse_state	*ps = &parse_state;
 			int			 flags = ps->input->flags;
+			int			 flag = 1;
+			struct cmd_parse_scope	*scope;
 
-			if ((~flags & CMD_PARSE_PARSEONLY) &&
-			    (ps->scope == NULL || ps->scope->flag))
+			if (ps->scope != NULL) {
+				flag = ps->scope->flag;
+				TAILQ_FOREACH(scope, &ps->stack, entry)
+					flag = flag && scope->flag;
+			}
+
+			if ((~flags & CMD_PARSE_PARSEONLY) && flag)
 				environ_put(global_environ, $1, 0);
 			free($1);
 		}
@@ -220,9 +241,16 @@ hidden_assignment : HIDDEN EQUALS
 		{
 			struct cmd_parse_state	*ps = &parse_state;
 			int			 flags = ps->input->flags;
+			int			 flag = 1;
+			struct cmd_parse_scope	*scope;
 
-			if ((~flags & CMD_PARSE_PARSEONLY) &&
-			    (ps->scope == NULL || ps->scope->flag))
+			if (ps->scope != NULL) {
+				flag = ps->scope->flag;
+				TAILQ_FOREACH(scope, &ps->stack, entry)
+					flag = flag && scope->flag;
+			}
+
+			if ((~flags & CMD_PARSE_PARSEONLY) && flag)
 				environ_put(global_environ, $2, ENVIRON_HIDDEN);
 			free($2);
 		}
@@ -360,7 +388,7 @@ commands	: command
 			struct cmd_parse_state	*ps = &parse_state;
 
 			$$ = cmd_parse_new_commands();
-			if ($1->argc != 0 &&
+			if (!TAILQ_EMPTY(&$1->arguments) &&
 			    (ps->scope == NULL || ps->scope->flag))
 				TAILQ_INSERT_TAIL($$, $1, entry);
 			else
@@ -380,7 +408,7 @@ commands	: command
 		{
 			struct cmd_parse_state	*ps = &parse_state;
 
-			if ($3->argc != 0 &&
+			if (!TAILQ_EMPTY(&$3->arguments) &&
 			    (ps->scope == NULL || ps->scope->flag)) {
 				$$ = $1;
 				TAILQ_INSERT_TAIL($$, $3, entry);
@@ -401,27 +429,38 @@ command		: assignment
 
 			$$ = xcalloc(1, sizeof *$$);
 			$$->line = ps->input->line;
+			TAILQ_INIT(&$$->arguments);
 		}
 		| optional_assignment TOKEN
 		{
-			struct cmd_parse_state	*ps = &parse_state;
+			struct cmd_parse_state		*ps = &parse_state;
+			struct cmd_parse_argument	*arg;
 
 			$$ = xcalloc(1, sizeof *$$);
 			$$->line = ps->input->line;
+			TAILQ_INIT(&$$->arguments);
 
-			cmd_prepend_argv(&$$->argc, &$$->argv, $2);
-
+			arg = xcalloc(1, sizeof *arg);
+			arg->type = CMD_PARSE_STRING;
+			arg->string = $2;
+			TAILQ_INSERT_HEAD(&$$->arguments, arg, entry);
 		}
 		| optional_assignment TOKEN arguments
 		{
-			struct cmd_parse_state	*ps = &parse_state;
+			struct cmd_parse_state		*ps = &parse_state;
+			struct cmd_parse_argument	*arg;
 
 			$$ = xcalloc(1, sizeof *$$);
 			$$->line = ps->input->line;
+			TAILQ_INIT(&$$->arguments);
 
-			$$->argc = $3.argc;
-			$$->argv = $3.argv;
-			cmd_prepend_argv(&$$->argc, &$$->argv, $2);
+			TAILQ_CONCAT(&$$->arguments, $3, entry);
+			free($3);
+
+			arg = xcalloc(1, sizeof *arg);
+			arg->type = CMD_PARSE_STRING;
+			arg->string = $2;
+			TAILQ_INSERT_HEAD(&$$->arguments, arg, entry);
 		}
 
 condition1	: if_open commands if_close
@@ -505,30 +544,34 @@ elif1		: if_elif commands
 
 arguments	: argument
 		{
-			$$.argc = 1;
-			$$.argv = xreallocarray(NULL, 1, sizeof *$$.argv);
+			$$ = xcalloc(1, sizeof *$$);
+			TAILQ_INIT($$);
 
-			$$.argv[0] = $1;
+			TAILQ_INSERT_HEAD($$, $1, entry);
 		}
 		| argument arguments
 		{
-			cmd_prepend_argv(&$2.argc, &$2.argv, $1);
-			free($1);
+			TAILQ_INSERT_HEAD($2, $1, entry);
 			$$ = $2;
 		}
 
 argument	: TOKEN
 		{
-			$$ = $1;
+			$$ = xcalloc(1, sizeof *$$);
+			$$->type = CMD_PARSE_STRING;
+			$$->string = $1;
 		}
 		| EQUALS
 		{
-			$$ = $1;
+			$$ = xcalloc(1, sizeof *$$);
+			$$->type = CMD_PARSE_STRING;
+			$$->string = $1;
 		}
 		| '{' argument_statements
 		{
-			$$ = cmd_parse_commands_to_string($2);
-			cmd_parse_free_commands($2);
+			$$ = xcalloc(1, sizeof *$$);
+			$$->type = CMD_PARSE_COMMANDS;
+			$$->commands = $2;
 		}
 
 argument_statements	: statement '}'
@@ -552,30 +595,57 @@ cmd_parse_get_error(const char *file, u_int line, const char *error)
 	if (file == NULL)
 		s = xstrdup(error);
 	else
-		xasprintf (&s, "%s:%u: %s", file, line, error);
+		xasprintf(&s, "%s:%u: %s", file, line, error);
 	return (s);
 }
 
 static void
-cmd_parse_print_commands(struct cmd_parse_input *pi, u_int line,
-    struct cmd_list *cmdlist)
+cmd_parse_print_commands(struct cmd_parse_input *pi, struct cmd_list *cmdlist)
 {
 	char	*s;
 
-	if (pi->item != NULL && (pi->flags & CMD_PARSE_VERBOSE)) {
-		s = cmd_list_print(cmdlist, 0);
-		if (pi->file != NULL)
-			cmdq_print(pi->item, "%s:%u: %s", pi->file, line, s);
-		else
-			cmdq_print(pi->item, "%u: %s", line, s);
-		free(s);
+	if (pi->item == NULL || (~pi->flags & CMD_PARSE_VERBOSE))
+		return;
+	s = cmd_list_print(cmdlist, 0);
+	if (pi->file != NULL)
+		cmdq_print(pi->item, "%s:%u: %s", pi->file, pi->line, s);
+	else
+		cmdq_print(pi->item, "%u: %s", pi->line, s);
+	free(s);
+}
+
+static void
+cmd_parse_free_argument(struct cmd_parse_argument *arg)
+{
+	switch (arg->type) {
+	case CMD_PARSE_STRING:
+		free(arg->string);
+		break;
+	case CMD_PARSE_COMMANDS:
+		cmd_parse_free_commands(arg->commands);
+		break;
+	case CMD_PARSE_PARSED_COMMANDS:
+		cmd_list_free(arg->cmdlist);
+		break;
+	}
+	free(arg);
+}
+
+static void
+cmd_parse_free_arguments(struct cmd_parse_arguments *args)
+{
+	struct cmd_parse_argument	*arg, *arg1;
+
+	TAILQ_FOREACH_SAFE(arg, args, entry, arg1) {
+		TAILQ_REMOVE(args, arg, entry);
+		cmd_parse_free_argument(arg);
 	}
 }
 
 static void
 cmd_parse_free_command(struct cmd_parse_command *cmd)
 {
-	cmd_free_argv(cmd->argc, cmd->argv);
+	cmd_parse_free_arguments(&cmd->arguments);
 	free(cmd);
 }
 
@@ -585,7 +655,7 @@ cmd_parse_new_commands(void)
 	struct cmd_parse_commands	*cmds;
 
 	cmds = xmalloc(sizeof *cmds);
-	TAILQ_INIT (cmds);
+	TAILQ_INIT(cmds);
 	return (cmds);
 }
 
@@ -601,30 +671,6 @@ cmd_parse_free_commands(struct cmd_parse_commands *cmds)
 	free(cmds);
 }
 
-static char *
-cmd_parse_commands_to_string(struct cmd_parse_commands *cmds)
-{
-	struct cmd_parse_command	 *cmd;
-	char				 *string = NULL, *s, *line;
-
-	TAILQ_FOREACH(cmd, cmds, entry) {
-		line = cmd_stringify_argv(cmd->argc, cmd->argv);
-		if (string == NULL)
-			s = line;
-		else {
-			xasprintf(&s, "%s ; %s", s, line);
-			free(line);
-		}
-
-		free(string);
-		string = s;
-	}
-	if (string == NULL)
-		string = xstrdup("");
-	log_debug("%s: %s", __func__, string);
-	return (string);
-}
-
 static struct cmd_parse_commands *
 cmd_parse_run_parser(char **cause)
 {
@@ -674,72 +720,170 @@ cmd_parse_do_buffer(const char *buf, size_t len, struct cmd_parse_input *pi,
 	return (cmd_parse_run_parser(cause));
 }
 
-static struct cmd_parse_result *
-cmd_parse_build_commands(struct cmd_parse_commands *cmds,
-    struct cmd_parse_input *pi)
+static void
+cmd_parse_log_commands(struct cmd_parse_commands *cmds, const char *prefix)
 {
-	static struct cmd_parse_result	 pr;
-	struct cmd_parse_commands	*cmds2;
-	struct cmd_parse_command	*cmd, *cmd2, *next, *next2, *after;
-	u_int				 line = UINT_MAX;
-	int				 i;
-	struct cmd_list			*cmdlist = NULL, *result;
+	struct cmd_parse_command	*cmd;
+	struct cmd_parse_argument	*arg;
+	u_int				 i, j;
+	char				*s;
+
+	i = 0;
+	TAILQ_FOREACH(cmd, cmds, entry) {
+		j = 0;
+		TAILQ_FOREACH(arg, &cmd->arguments, entry) {
+			switch (arg->type) {
+			case CMD_PARSE_STRING:
+				log_debug("%s %u:%u: %s", prefix, i, j,
+				    arg->string);
+				break;
+			case CMD_PARSE_COMMANDS:
+				xasprintf(&s, "%s %u:%u", prefix, i, j);
+				cmd_parse_log_commands(arg->commands, s);
+				free(s);
+				break;
+			case CMD_PARSE_PARSED_COMMANDS:
+				s = cmd_list_print(arg->cmdlist, 0);
+				log_debug("%s %u:%u: %s", prefix, i, j, s);
+				free(s);
+				break;
+			}
+			j++;
+		}
+		i++;
+	}
+}
+
+static int
+cmd_parse_expand_alias(struct cmd_parse_command *cmd,
+    struct cmd_parse_input *pi, struct cmd_parse_result *pr)
+{
+	struct cmd_parse_argument	*arg, *arg1, *first;
+	struct cmd_parse_commands	*cmds;
+	struct cmd_parse_command	*last;
+	char				*alias, *name, *cause;
+
+	if (pi->flags & CMD_PARSE_NOALIAS)
+		return (0);
+	memset(pr, 0, sizeof *pr);
+
+	first = TAILQ_FIRST(&cmd->arguments);
+	if (first == NULL || first->type != CMD_PARSE_STRING) {
+		pr->status = CMD_PARSE_SUCCESS;
+		pr->cmdlist = cmd_list_new();
+		return (1);
+	}
+	name = first->string;
+
+	alias = cmd_get_alias(name);
+	if (alias == NULL)
+		return (0);
+	log_debug("%s: %u alias %s = %s", __func__, pi->line, name, alias);
+
+	cmds = cmd_parse_do_buffer(alias, strlen(alias), pi, &cause);
+	free(alias);
+	if (cmds == NULL) {
+		pr->status = CMD_PARSE_ERROR;
+		pr->error = cause;
+		return (1);
+	}
+
+	last = TAILQ_LAST(cmds, cmd_parse_commands);
+	if (last == NULL) {
+		pr->status = CMD_PARSE_SUCCESS;
+		pr->cmdlist = cmd_list_new();
+		return (1);
+	}
+
+	TAILQ_REMOVE(&cmd->arguments, first, entry);
+	cmd_parse_free_argument(first);
+
+	TAILQ_FOREACH_SAFE(arg, &cmd->arguments, entry, arg1) {
+		TAILQ_REMOVE(&cmd->arguments, arg, entry);
+		TAILQ_INSERT_TAIL(&last->arguments, arg, entry);
+	}
+	cmd_parse_log_commands(cmds, __func__);
+
+	pi->flags |= CMD_PARSE_NOALIAS;
+	cmd_parse_build_commands(cmds, pi, pr);
+	pi->flags &= ~CMD_PARSE_NOALIAS;
+	return (1);
+}
+
+static void
+cmd_parse_build_command(struct cmd_parse_command *cmd,
+    struct cmd_parse_input *pi, struct cmd_parse_result *pr)
+{
+	struct cmd_parse_argument	*arg;
 	struct cmd			*add;
-	char				*name, *alias, *cause, *s;
+	char				*cause;
+	struct args_value		*values = NULL;
+	u_int				 count = 0, idx;
+
+	memset(pr, 0, sizeof *pr);
+
+	if (cmd_parse_expand_alias(cmd, pi, pr))
+		return;
+
+	TAILQ_FOREACH(arg, &cmd->arguments, entry) {
+		values = xrecallocarray(values, count, count + 1,
+		    sizeof *values);
+		switch (arg->type) {
+		case CMD_PARSE_STRING:
+			values[count].type = ARGS_STRING;
+			values[count].string = xstrdup(arg->string);
+			break;
+		case CMD_PARSE_COMMANDS:
+			cmd_parse_build_commands(arg->commands, pi, pr);
+			if (pr->status != CMD_PARSE_SUCCESS)
+				goto out;
+			values[count].type = ARGS_COMMANDS;
+			values[count].cmdlist = pr->cmdlist;
+			break;
+		case CMD_PARSE_PARSED_COMMANDS:
+			values[count].type = ARGS_COMMANDS;
+			values[count].cmdlist = arg->cmdlist;
+			values[count].cmdlist->references++;
+			break;
+		}
+		count++;
+	}
+
+	add = cmd_parse(values, count, pi->file, pi->line, &cause);
+	if (add == NULL) {
+		pr->status = CMD_PARSE_ERROR;
+		pr->error = cmd_parse_get_error(pi->file, pi->line, cause);
+		free(cause);
+		goto out;
+	}
+	pr->status = CMD_PARSE_SUCCESS;
+	pr->cmdlist = cmd_list_new();
+	cmd_list_append(pr->cmdlist, add);
+
+out:
+	for (idx = 0; idx < count; idx++)
+		args_free_value(&values[idx]);
+	free(values);
+}
+
+static void
+cmd_parse_build_commands(struct cmd_parse_commands *cmds,
+    struct cmd_parse_input *pi, struct cmd_parse_result *pr)
+{
+	struct cmd_parse_command	*cmd;
+	u_int				 line = UINT_MAX;
+	struct cmd_list			*current = NULL, *result;
+	char				*s;
+
+	memset(pr, 0, sizeof *pr);
 
 	/* Check for an empty list. */
 	if (TAILQ_EMPTY(cmds)) {
-		cmd_parse_free_commands(cmds);
-		pr.status = CMD_PARSE_EMPTY;
-		return (&pr);
-	}
-
-	/*
-	 * Walk the commands and expand any aliases. Each alias is parsed
-	 * individually to a new command list, any trailing arguments appended
-	 * to the last command, and all commands inserted into the original
-	 * command list.
-	 */
-	TAILQ_FOREACH_SAFE(cmd, cmds, entry, next) {
-		name = cmd->argv[0];
-
-		alias = cmd_get_alias(name);
-		if (alias == NULL)
-			continue;
-
-		line = cmd->line;
-		log_debug("%s: %u %s = %s", __func__, line, name, alias);
-
-		pi->line = line;
-		cmds2 = cmd_parse_do_buffer(alias, strlen(alias), pi, &cause);
-		free(alias);
-		if (cmds2 == NULL) {
-			pr.status = CMD_PARSE_ERROR;
-			pr.error = cause;
-			goto out;
-		}
-
-		cmd2 = TAILQ_LAST(cmds2, cmd_parse_commands);
-		if (cmd2 == NULL) {
-			TAILQ_REMOVE(cmds, cmd, entry);
-			cmd_parse_free_command(cmd);
-			continue;
-		}
-		for (i = 1; i < cmd->argc; i++)
-			cmd_append_argv(&cmd2->argc, &cmd2->argv, cmd->argv[i]);
-
-		after = cmd;
-		TAILQ_FOREACH_SAFE(cmd2, cmds2, entry, next2) {
-			cmd2->line = line;
-			TAILQ_REMOVE(cmds2, cmd2, entry);
-			TAILQ_INSERT_AFTER(cmds, after, cmd2, entry);
-			after = cmd2;
-		}
-		cmd_parse_free_commands(cmds2);
-
-		TAILQ_REMOVE(cmds, cmd, entry);
-		cmd_parse_free_command(cmd);
+		pr->status = CMD_PARSE_SUCCESS;
+		pr->cmdlist = cmd_list_new();
+		return;
 	}
+	cmd_parse_log_commands(cmds, __func__);
 
 	/*
 	 * Parse each command into a command list. Create a new command list
@@ -749,49 +893,39 @@ cmd_parse_build_commands(struct cmd_parse_commands *cmds,
 	 */
 	result = cmd_list_new();
 	TAILQ_FOREACH(cmd, cmds, entry) {
-		name = cmd->argv[0];
-		log_debug("%s: %u %s", __func__, cmd->line, name);
-		cmd_log_argv(cmd->argc, cmd->argv, __func__);
-
-		if (cmdlist == NULL ||
-		    ((~pi->flags & CMD_PARSE_ONEGROUP) && cmd->line != line)) {
-			if (cmdlist != NULL) {
-				cmd_parse_print_commands(pi, line, cmdlist);
-				cmd_list_move(result, cmdlist);
-				cmd_list_free(cmdlist);
+		if (((~pi->flags & CMD_PARSE_ONEGROUP) && cmd->line != line)) {
+			if (current != NULL) {
+				cmd_parse_print_commands(pi, current);
+				cmd_list_move(result, current);
+				cmd_list_free(current);
 			}
-			cmdlist = cmd_list_new();
+			current = cmd_list_new();
 		}
-		line = cmd->line;
+		if (current == NULL)
+			current = cmd_list_new();
+		line = pi->line = cmd->line;
 
-		add = cmd_parse(cmd->argc, cmd->argv, pi->file, line, &cause);
-		if (add == NULL) {
+		cmd_parse_build_command(cmd, pi, pr);
+		if (pr->status != CMD_PARSE_SUCCESS) {
 			cmd_list_free(result);
-			pr.status = CMD_PARSE_ERROR;
-			pr.error = cmd_parse_get_error(pi->file, line, cause);
-			free(cause);
-			cmd_list_free(cmdlist);
-			goto out;
+			cmd_list_free(current);
+			return;
 		}
-		cmd_list_append(cmdlist, add);
+		cmd_list_append_all(current, pr->cmdlist);
+		cmd_list_free(pr->cmdlist);
 	}
-	if (cmdlist != NULL) {
-		cmd_parse_print_commands(pi, line, cmdlist);
-		cmd_list_move(result, cmdlist);
-		cmd_list_free(cmdlist);
+	if (current != NULL) {
+		cmd_parse_print_commands(pi, current);
+		cmd_list_move(result, current);
+		cmd_list_free(current);
 	}
 
 	s = cmd_list_print(result, 0);
 	log_debug("%s: %s", __func__, s);
 	free(s);
 
-	pr.status = CMD_PARSE_SUCCESS;
-	pr.cmdlist = result;
-
-out:
-	cmd_parse_free_commands(cmds);
-
-	return (&pr);
+	pr->status = CMD_PARSE_SUCCESS;
+	pr->cmdlist = result;
 }
 
 struct cmd_parse_result *
@@ -814,7 +948,10 @@ cmd_parse_from_file(FILE *f, struct cmd_parse_input *pi)
 		pr.error = cause;
 		return (&pr);
 	}
-	return (cmd_parse_build_commands(cmds, pi));
+	cmd_parse_build_commands(cmds, pi, &pr);
+	cmd_parse_free_commands(cmds);
+	return (&pr);
+
 }
 
 struct cmd_parse_result *
@@ -845,8 +982,6 @@ cmd_parse_and_insert(const char *s, struct cmd_parse_input *pi,
 
 	pr = cmd_parse_from_string(s, pi);
 	switch (pr->status) {
-	case CMD_PARSE_EMPTY:
-		break;
 	case CMD_PARSE_ERROR:
 		if (error != NULL)
 			*error = pr->error;
@@ -871,8 +1006,6 @@ cmd_parse_and_append(const char *s, struct cmd_parse_input *pi,
 
 	pr = cmd_parse_from_string(s, pi);
 	switch (pr->status) {
-	case CMD_PARSE_EMPTY:
-		break;
 	case CMD_PARSE_ERROR:
 		if (error != NULL)
 			*error = pr->error;
@@ -903,9 +1036,8 @@ cmd_parse_from_buffer(const void *buf, size_t len, struct cmd_parse_input *pi)
 	memset(&pr, 0, sizeof pr);
 
 	if (len == 0) {
-		pr.status = CMD_PARSE_EMPTY;
-		pr.cmdlist = NULL;
-		pr.error = NULL;
+		pr.status = CMD_PARSE_SUCCESS;
+		pr.cmdlist = cmd_list_new();
 		return (&pr);
 	}
 
@@ -915,18 +1047,24 @@ cmd_parse_from_buffer(const void *buf, size_t len, struct cmd_parse_input *pi)
 		pr.error = cause;
 		return (&pr);
 	}
-	return (cmd_parse_build_commands(cmds, pi));
+	cmd_parse_build_commands(cmds, pi, &pr);
+	cmd_parse_free_commands(cmds);
+	return (&pr);
 }
 
 struct cmd_parse_result *
-cmd_parse_from_arguments(int argc, char **argv, struct cmd_parse_input *pi)
+cmd_parse_from_arguments(struct args_value *values, u_int count,
+    struct cmd_parse_input *pi)
 {
-	struct cmd_parse_input		  input;
-	struct cmd_parse_commands	 *cmds;
-	struct cmd_parse_command	 *cmd;
-	char				**copy, **new_argv;
-	size_t				  size;
-	int				  i, last, new_argc;
+	static struct cmd_parse_result	 pr;
+	struct cmd_parse_input		 input;
+	struct cmd_parse_commands	*cmds;
+	struct cmd_parse_command	*cmd;
+	struct cmd_parse_argument	*arg;
+	u_int				 i;
+	char				*copy;
+	size_t				 size;
+	int				 end;
 
 	/*
 	 * The commands are already split up into arguments, so just separate
@@ -937,62 +1075,56 @@ cmd_parse_from_arguments(int argc, char **argv, struct cmd_parse_input *pi)
 		memset(&input, 0, sizeof input);
 		pi = &input;
 	}
-	cmd_log_argv(argc, argv, "%s", __func__);
+	memset(&pr, 0, sizeof pr);
 
 	cmds = cmd_parse_new_commands();
-	copy = cmd_copy_argv(argc, argv);
 
-	last = 0;
-	for (i = 0; i < argc; i++) {
-		size = strlen(copy[i]);
-		if (size == 0 || copy[i][size - 1] != ';')
-			continue;
-		copy[i][--size] = '\0';
-		if (size > 0 && copy[i][size - 1] == '\\') {
-			copy[i][size - 1] = ';';
-			continue;
-		}
-
-		new_argc = i - last;
-		new_argv = copy + last;
-		if (size != 0)
-			new_argc++;
-
-		if (new_argc != 0) {
-			cmd_log_argv(new_argc, new_argv, "%s: at %u", __func__,
-			    i);
+	cmd = xcalloc(1, sizeof *cmd);
+	cmd->line = pi->line;
+	TAILQ_INIT(&cmd->arguments);
 
+	for (i = 0; i < count; i++) {
+		end = 0;
+		if (values[i].type == ARGS_STRING) {
+			copy = xstrdup(values[i].string);
+			size = strlen(copy);
+			if (size != 0 && copy[size - 1] == ';') {
+				copy[--size] = '\0';
+				if (size > 0 && copy[size - 1] == '\\')
+					copy[size - 1] = ';';
+				else
+					end = 1;
+			}
+			if (!end || size != 0) {
+				arg = xcalloc(1, sizeof *arg);
+				arg->type = CMD_PARSE_STRING;
+				arg->string = copy;
+				TAILQ_INSERT_TAIL(&cmd->arguments, arg, entry);
+			} else
+				free(copy);
+		} else if (values[i].type == ARGS_COMMANDS) {
+			arg = xcalloc(1, sizeof *arg);
+			arg->type = CMD_PARSE_PARSED_COMMANDS;
+			arg->cmdlist = values[i].cmdlist;
+			arg->cmdlist->references++;
+			TAILQ_INSERT_TAIL(&cmd->arguments, arg, entry);
+		} else
+			fatalx("unknown argument type");
+		if (end) {
+			TAILQ_INSERT_TAIL(cmds, cmd, entry);
 			cmd = xcalloc(1, sizeof *cmd);
 			cmd->line = pi->line;
-
-			cmd->argc = new_argc;
-			cmd->argv = cmd_copy_argv(new_argc, new_argv);
-
-			TAILQ_INSERT_TAIL(cmds, cmd, entry);
-		}
-
-		last = i + 1;
-	}
-	if (last != argc) {
-		new_argv = copy + last;
-		new_argc = argc - last;
-
-		if (new_argc != 0) {
-			cmd_log_argv(new_argc, new_argv, "%s: at %u", __func__,
-			    last);
-
-			cmd = xcalloc(1, sizeof *cmd);
-			cmd->line = pi->line;
-
-			cmd->argc = new_argc;
-			cmd->argv = cmd_copy_argv(new_argc, new_argv);
-
-			TAILQ_INSERT_TAIL(cmds, cmd, entry);
+			TAILQ_INIT(&cmd->arguments);
 		}
 	}
+	if (!TAILQ_EMPTY(&cmd->arguments))
+		TAILQ_INSERT_TAIL(cmds, cmd, entry);
+	else
+		free(cmd);
 
-	cmd_free_argv(argc, copy);
-	return (cmd_parse_build_commands(cmds, pi));
+	cmd_parse_build_commands(cmds, pi, &pr);
+	cmd_parse_free_commands(cmds);
+	return (&pr);
 }
 
 static int printflike(1, 2)
@@ -1155,6 +1287,16 @@ yylex(void)
 			continue;
 		}
 
+		if (ch == '\r') {
+			/*
+			 * Treat \r\n as \n.
+			 */
+			ch = yylex_getc();
+			if (ch != '\n') {
+				yylex_ungetc(ch);
+				ch = '\r';
+			}
+		}
 		if (ch == '\n') {
 			/*
 			 * End of line. Update the line number.
@@ -1309,7 +1451,7 @@ yylex_token_escape(char **buf, size_t *len)
 			if (o3 >= '0' && o3 <= '7') {
 				ch = 64 * (ch - '0') +
 				      8 * (o2 - '0') +
-				          (o3 - '0');
+					  (o3 - '0');
 				yylex_append1(buf, len, ch);
 				return (1);
 			}
@@ -1485,6 +1627,7 @@ yylex_token_tilde(char **buf, size_t *len)
 static char *
 yylex_token(int ch)
 {
+	struct cmd_parse_state	*ps = &parse_state;
 	char			*buf;
 	size_t			 len;
 	enum { START,
@@ -1497,13 +1640,34 @@ yylex_token(int ch)
 
 	for (;;) {
 		/* EOF or \n are always the end of the token. */
-		if (ch == EOF || (state == NONE && ch == '\n'))
+		if (ch == EOF) {
+			log_debug("%s: end at EOF", __func__);
 			break;
+		}
+		if (state == NONE && ch == '\r') {
+			ch = yylex_getc();
+			if (ch != '\n') {
+				yylex_ungetc(ch);
+				ch = '\r';
+			}
+		}
+		if (ch == '\n') {
+			if (state == NONE) {
+				log_debug("%s: end at EOL", __func__);
+				break;
+			}
+			ps->input->line++;
+		}
 
 		/* Whitespace or ; or } ends a token unless inside quotes. */
-		if ((ch == ' ' || ch == '\t' || ch == ';' || ch == '}') &&
-		    state == NONE)
+		if (state == NONE && (ch == ' ' || ch == '\t')) {
+			log_debug("%s: end at WS", __func__);
 			break;
+		}
+		if (state == NONE && (ch == ';' || ch == '}')) {
+			log_debug("%s: end at %c", __func__, ch);
+			break;
+		}
 
 		/*
 		 * Spaces and comments inside quotes after \n are removed but

cmd-paste-buffer.c

@@ -33,7 +33,7 @@ const struct cmd_entry cmd_paste_buffer_entry = {
 	.name = "paste-buffer",
 	.alias = "pasteb",
 
-	.args = { "db:prs:t:", 0, 0 },
+	.args = { "db:prs:t:", 0, 0, NULL },
 	.usage = "[-dpr] [-s separator] " CMD_BUFFER_USAGE " "
 		 CMD_TARGET_PANE_USAGE,
 
@@ -54,6 +54,11 @@ cmd_paste_buffer_exec(struct cmd *self, struct cmdq_item *item)
 	size_t			 seplen, bufsize;
 	int			 bracket = args_has(args, 'p');
 
+	if (window_pane_exited(wp)) {
+		cmdq_error(item, "target pane has exited");
+		return (CMD_RETURN_ERROR);
+	}
+
 	bufname = NULL;
 	if (args_has(args, 'b'))
 		bufname = args_get(args, 'b');

cmd-pipe-pane.c

@@ -43,8 +43,8 @@ const struct cmd_entry cmd_pipe_pane_entry = {
 	.name = "pipe-pane",
 	.alias = "pipep",
 
-	.args = { "IOot:", 0, 1 },
-	.usage = "[-IOo] " CMD_TARGET_PANE_USAGE " [command]",
+	.args = { "IOot:", 0, 1, NULL },
+	.usage = "[-IOo] " CMD_TARGET_PANE_USAGE " [shell-command]",
 
 	.target = { 't', CMD_FIND_PANE, 0 },
 
@@ -67,6 +67,12 @@ cmd_pipe_pane_exec(struct cmd *self, struct cmdq_item *item)
 	struct format_tree		*ft;
 	sigset_t			 set, oldset;
 
+	/* Do nothing if pane is dead. */
+	if (window_pane_exited(wp)) {
+		cmdq_error(item, "target pane has exited");
+		return (CMD_RETURN_ERROR);
+	}
+
 	/* Destroy the old pipe. */
 	old_fd = wp->pipe_fd;
 	if (wp->pipe_fd != -1) {
@@ -81,7 +87,7 @@ cmd_pipe_pane_exec(struct cmd *self, struct cmdq_item *item)
 	}
 
 	/* If no pipe command, that is enough. */
-	if (args->argc == 0 || *args->argv[0] == '\0')
+	if (args_count(args) == 0 || *args_string(args, 0) == '\0')
 		return (CMD_RETURN_NORMAL);
 
 	/*
@@ -111,7 +117,7 @@ cmd_pipe_pane_exec(struct cmd *self, struct cmdq_item *item)
 	/* Expand the command. */
 	ft = format_create(cmdq_get_client(item), item, FORMAT_NONE, 0);
 	format_defaults(ft, tc, s, wl, wp);
-	cmd = format_expand_time(ft, args->argv[0]);
+	cmd = format_expand_time(ft, args_string(args, 0));
 	format_free(ft);
 
 	/* Fork the child. */
@@ -130,7 +136,7 @@ cmd_pipe_pane_exec(struct cmd *self, struct cmdq_item *item)
 		sigprocmask(SIG_SETMASK, &oldset, NULL);
 		close(pipe_fd[0]);
 
-		null_fd = open(_PATH_DEVNULL, O_WRONLY, 0);
+		null_fd = open(_PATH_DEVNULL, O_WRONLY);
 		if (out) {
 			if (dup2(pipe_fd[1], STDIN_FILENO) == -1)
 				_exit(1);

cmd-queue.c

@@ -19,9 +19,11 @@
 #include <sys/types.h>
 
 #include <ctype.h>
+#include <pwd.h>
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
+#include <unistd.h>
 
 #include "tmux.h"
 
@@ -124,7 +126,7 @@ cmdq_new(void)
 {
 	struct cmdq_list	*queue;
 
-	queue = xcalloc (1, sizeof *queue);
+	queue = xcalloc(1, sizeof *queue);
 	TAILQ_INIT (&queue->list);
 	return (queue);
 }
@@ -234,8 +236,10 @@ cmdq_link_state(struct cmdq_state *state)
 
 /* Make a copy of a state. */
 struct cmdq_state *
-cmdq_copy_state(struct cmdq_state *state)
+cmdq_copy_state(struct cmdq_state *state, struct cmd_find_state *current)
 {
+	if (current != NULL)
+		return (cmdq_new_state(current, &state->event, state->flags));
 	return (cmdq_new_state(&state->current, &state->event, state->flags));
 }
 
@@ -269,6 +273,15 @@ cmdq_add_format(struct cmdq_state *state, const char *key, const char *fmt, ...)
 	free(value);
 }
 
+/* Add formats to command queue. */
+void
+cmdq_add_formats(struct cmdq_state *state, struct format_tree *ft)
+{
+	if (state->formats == NULL)
+		state->formats = format_create(NULL, NULL, FORMAT_NONE, 0);
+	format_merge(state->formats, ft);
+}
+
 /* Merge formats from item. */
 void
 cmdq_merge_formats(struct cmdq_item *item, struct format_tree *ft)
@@ -343,12 +356,12 @@ cmdq_insert_hook(struct session *s, struct cmdq_item *item,
 	struct cmdq_state		*state = item->state;
 	struct cmd			*cmd = item->cmd;
 	struct args			*args = cmd_get_args(cmd);
-	struct args_entry		*entryp;
-	struct args_value		*valuep;
+	struct args_entry		*ae;
+	struct args_value		*av;
 	struct options			*oo;
 	va_list				 ap;
 	char				*name, tmp[32], flag, *arguments;
-	int				 i;
+	u_int				 i;
 	const char			*value;
 	struct cmdq_item		*new_item;
 	struct cmdq_state		*new_state;
@@ -385,11 +398,11 @@ cmdq_insert_hook(struct session *s, struct cmdq_item *item,
 	cmdq_add_format(new_state, "hook_arguments", "%s", arguments);
 	free(arguments);
 
-	for (i = 0; i < args->argc; i++) {
+	for (i = 0; i < args_count(args); i++) {
 		xsnprintf(tmp, sizeof tmp, "hook_argument_%d", i);
-		cmdq_add_format(new_state, tmp, "%s", args->argv[i]);
+		cmdq_add_format(new_state, tmp, "%s", args_string(args, i));
 	}
-	flag = args_first(args, &entryp);
+	flag = args_first(args, &ae);
 	while (flag != 0) {
 		value = args_get(args, flag);
 		if (value == NULL) {
@@ -401,15 +414,15 @@ cmdq_insert_hook(struct session *s, struct cmdq_item *item,
 		}
 
 		i = 0;
-		value = args_first_value(args, flag, &valuep);
-		while (value != NULL) {
+		av = args_first_value(args, flag);
+		while (av != NULL) {
 			xsnprintf(tmp, sizeof tmp, "hook_flag_%c_%d", flag, i);
-			cmdq_add_format(new_state, tmp, "%s", value);
+			cmdq_add_format(new_state, tmp, "%s", av->string);
 			i++;
-			value = args_next_value(&valuep);
+			av = args_next_value(av);
 		}
 
-		flag = args_next(&entryp);
+		flag = args_next(&ae);
 	}
 
 	a = options_array_first(o);
@@ -469,6 +482,13 @@ cmdq_remove_group(struct cmdq_item *item)
 	}
 }
 
+/* Empty command callback. */
+static enum cmd_retval
+cmdq_empty_command(__unused struct cmdq_item *item, __unused void *data)
+{
+	return (CMD_RETURN_NORMAL);
+}
+
 /* Get a command for the command queue. */
 struct cmdq_item *
 cmdq_get_command(struct cmd_list *cmdlist, struct cmdq_state *state)
@@ -478,12 +498,14 @@ cmdq_get_command(struct cmd_list *cmdlist, struct cmdq_state *state)
 	const struct cmd_entry	*entry;
 	int			 created = 0;
 
+	if ((cmd = cmd_list_first(cmdlist)) == NULL)
+		return (cmdq_get_callback(cmdq_empty_command, NULL));
+
 	if (state == NULL) {
 		state = cmdq_new_state(NULL, NULL, 0);
 		created = 1;
 	}
 
-	cmd = cmd_list_first(cmdlist);
 	while (cmd != NULL) {
 		entry = cmd_get_entry(cmd);
 
@@ -540,17 +562,31 @@ cmdq_add_message(struct cmdq_item *item)
 {
 	struct client		*c = item->client;
 	struct cmdq_state	*state = item->state;
-	const char		*name, *key;
+	const char		*key;
 	char			*tmp;
+	uid_t                    uid;
+	struct passwd		*pw;
+	char                    *user = NULL;
 
 	tmp = cmd_print(item->cmd);
 	if (c != NULL) {
-		name = c->name;
+		uid = proc_get_peer_uid(c->peer);
+		if (uid != (uid_t)-1 && uid != getuid()) {
+			if ((pw = getpwuid(uid)) != NULL)
+				xasprintf(&user, "[%s]", pw->pw_name);
+			else
+				user = xstrdup("[unknown]");
+		} else
+			user = xstrdup("");
 		if (c->session != NULL && state->event.key != KEYC_NONE) {
 			key = key_string_lookup_key(state->event.key, 0);
-			server_add_message("%s key %s: %s", name, key, tmp);
-		} else
-			server_add_message("%s command: %s", name, tmp);
+			server_add_message("%s%s key %s: %s", c->name, user,
+			    key, tmp);
+		} else {
+			server_add_message("%s%s command: %s", c->name, user,
+			    tmp);
+		}
+		free(user);
 	} else
 		server_add_message("command: %s", tmp);
 	free(tmp);
@@ -628,9 +664,18 @@ cmdq_fire_command(struct cmdq_item *item)
 
 out:
 	item->client = saved;
-	if (retval == CMD_RETURN_ERROR)
+	if (retval == CMD_RETURN_ERROR) {
+		fsp = NULL;
+		if (cmd_find_valid_state(&item->target))
+			fsp = &item->target;
+		else if (cmd_find_valid_state(&item->state->current))
+			fsp = &item->state->current;
+		else if (cmd_find_from_client(&fs, item->client, 0) == 0)
+			fsp = &fs;
+		cmdq_insert_hook(fsp != NULL ? fsp->s : NULL, item, fsp,
+		    "command-error");
 		cmdq_guard(item, "error", flags);
-	else
+	} else
 		cmdq_guard(item, "end", flags);
 	return (retval);
 }
@@ -769,10 +814,10 @@ cmdq_running(struct client *c)
 	struct cmdq_list	*queue = cmdq_get(c);
 
 	if (queue->item == NULL)
-        return (NULL);
-    if (queue->item->flags & CMDQ_WAITING)
-        return (NULL);
-    return (queue->item);
+		return (NULL);
+	if (queue->item->flags & CMDQ_WAITING)
+		return (NULL);
+	return (queue->item);
 }
 
 /* Print a guard line. */
@@ -787,45 +832,30 @@ cmdq_guard(struct cmdq_item *item, const char *guard, int flags)
 		control_write(c, "%%%s %ld %u %d", guard, t, number, flags);
 }
 
+/* Show message from command. */
+void
+cmdq_print_data(struct cmdq_item *item, struct evbuffer *evb)
+{
+	server_client_print(item->client, 1, evb);
+}
+
 /* Show message from command. */
 void
 cmdq_print(struct cmdq_item *item, const char *fmt, ...)
 {
-	struct client			*c = item->client;
-	struct window_pane		*wp;
-	struct window_mode_entry	*wme;
-	va_list				 ap;
-	char				*tmp, *msg;
+	va_list		 ap;
+	struct evbuffer	*evb;
+
+	evb = evbuffer_new();
+	if (evb == NULL)
+		fatalx("out of memory");
 
 	va_start(ap, fmt);
-	xvasprintf(&msg, fmt, ap);
+	evbuffer_add_vprintf(evb, fmt, ap);
 	va_end(ap);
 
-	log_debug("%s: %s", __func__, msg);
-
-	if (c == NULL)
-		/* nothing */;
-	else if (c->session == NULL || (c->flags & CLIENT_CONTROL)) {
-		if (~c->flags & CLIENT_UTF8) {
-			tmp = msg;
-			msg = utf8_sanitize(tmp);
-			free(tmp);
-		}
-		if (c->flags & CLIENT_CONTROL)
-			control_write(c, "%s", msg);
-		else
-			file_print(c, "%s\n", msg);
-	} else {
-		wp = server_client_get_pane(c);
-		wme = TAILQ_FIRST(&wp->modes);
-		if (wme == NULL || wme->mode != &window_view_mode) {
-			window_pane_set_mode(wp, NULL, &window_view_mode, NULL,
-			    NULL);
-		}
-		window_copy_add(wp, "%s", msg);
-	}
-
-	free(msg);
+	cmdq_print_data(item, evb);
+	evbuffer_free(evb);
 }
 
 /* Show error from command. */
@@ -862,7 +892,7 @@ cmdq_error(struct cmdq_item *item, const char *fmt, ...)
 		c->retval = 1;
 	} else {
 		*msg = toupper((u_char) *msg);
-		status_message_set(c, -1, 1, 0, "%s", msg);
+		status_message_set(c, -1, 1, 0, 0, "%s", msg);
 	}
 
 	free(msg);

cmd-refresh-client.c

@@ -34,9 +34,10 @@ const struct cmd_entry cmd_refresh_client_entry = {
 	.name = "refresh-client",
 	.alias = "refresh",
 
-	.args = { "A:B:cC:Df:F:lLRSt:U", 0, 1 },
+	.args = { "A:B:cC:Df:r:F:l::LRSt:U", 0, 1, NULL },
 	.usage = "[-cDlLRSU] [-A pane:state] [-B name:what:format] "
-		 "[-C XxY] [-f flags] " CMD_TARGET_CLIENT_USAGE " [adjustment]",
+		 "[-C XxY] [-f flags] [-r pane:report] " CMD_TARGET_CLIENT_USAGE
+		 " [adjustment]",
 
 	.flags = CMD_AFTERHOOK|CMD_CLIENT_TFLAG,
 	.exec = cmd_refresh_client_exec
@@ -77,6 +78,58 @@ out:
 	free(copy);
 }
 
+static enum cmd_retval
+cmd_refresh_client_control_client_size(struct cmd *self, struct cmdq_item *item)
+{
+	struct args		*args = cmd_get_args(self);
+	struct client		*tc = cmdq_get_target_client(item);
+	const char		*size = args_get(args, 'C');
+	u_int			 w, x, y;
+	struct client_window	*cw;
+
+	if (sscanf(size, "@%u:%ux%u", &w, &x, &y) == 3) {
+		if (x < WINDOW_MINIMUM || x > WINDOW_MAXIMUM ||
+		    y < WINDOW_MINIMUM || y > WINDOW_MAXIMUM) {
+			cmdq_error(item, "size too small or too big");
+			return (CMD_RETURN_ERROR);
+		}
+		log_debug("%s: client %s window @%u: size %ux%u", __func__,
+		    tc->name, w, x, y);
+		cw = server_client_add_client_window(tc, w);
+		cw->sx = x;
+		cw->sy = y;
+		tc->flags |= CLIENT_WINDOWSIZECHANGED;
+		recalculate_sizes_now(1);
+		return (CMD_RETURN_NORMAL);
+	}
+	if (sscanf(size, "@%u:", &w) == 1) {
+		cw = server_client_get_client_window(tc, w);
+		if (cw != NULL) {
+			log_debug("%s: client %s window @%u: no size", __func__,
+			    tc->name, w);
+			cw->sx = 0;
+			cw->sy = 0;
+			recalculate_sizes_now(1);
+		}
+		return (CMD_RETURN_NORMAL);
+	}
+
+	if (sscanf(size, "%u,%u", &x, &y) != 2 &&
+	    sscanf(size, "%ux%u", &x, &y) != 2) {
+		cmdq_error(item, "bad size argument");
+		return (CMD_RETURN_ERROR);
+	}
+	if (x < WINDOW_MINIMUM || x > WINDOW_MAXIMUM ||
+	    y < WINDOW_MINIMUM || y > WINDOW_MAXIMUM) {
+		cmdq_error(item, "size too small or too big");
+		return (CMD_RETURN_ERROR);
+	}
+	tty_set_size(&tc->tty, x, y, 0, 0);
+	tc->flags |= CLIENT_SIZECHANGED;
+	recalculate_sizes_now(1);
+	return (CMD_RETURN_NORMAL);
+}
+
 static void
 cmd_refresh_client_update_offset(struct client *tc, const char *value)
 {
@@ -110,6 +163,65 @@ out:
 	free(copy);
 }
 
+static enum cmd_retval
+cmd_refresh_client_clipboard(struct cmd *self, struct cmdq_item *item)
+{
+	struct args		*args = cmd_get_args(self);
+	struct client		*tc = cmdq_get_target_client(item);
+	const char		*p;
+	u_int			 i;
+	struct cmd_find_state	 fs;
+
+	p = args_get(args, 'l');
+	if (p == NULL) {
+		if (tc->flags & CLIENT_CLIPBOARDBUFFER)
+			return (CMD_RETURN_NORMAL);
+		tc->flags |= CLIENT_CLIPBOARDBUFFER;
+	} else {
+		if (cmd_find_target(&fs, item, p, CMD_FIND_PANE, 0) != 0)
+			return (CMD_RETURN_ERROR);
+		for (i = 0; i < tc->clipboard_npanes; i++) {
+			if (tc->clipboard_panes[i] == fs.wp->id)
+				break;
+		}
+		if (i != tc->clipboard_npanes)
+			return (CMD_RETURN_NORMAL);
+		tc->clipboard_panes = xreallocarray(tc->clipboard_panes,
+		    tc->clipboard_npanes + 1, sizeof *tc->clipboard_panes);
+		tc->clipboard_panes[tc->clipboard_npanes++] = fs.wp->id;
+	}
+	tty_clipboard_query(&tc->tty);
+	return (CMD_RETURN_NORMAL);
+}
+
+static void
+cmd_refresh_report(struct tty *tty, const char *value)
+{
+	struct window_pane	*wp;
+	u_int			 pane;
+	size_t			 size = 0;
+	char			*copy, *split;
+
+	if (*value != '%')
+		return;
+	copy = xstrdup(value);
+	if ((split = strchr(copy, ':')) == NULL)
+		goto out;
+	*split++ = '\0';
+
+	if (sscanf(copy, "%%%u", &pane) != 1)
+		goto out;
+	wp = window_pane_find_by_id(pane);
+	if (wp == NULL)
+		goto out;
+
+	tty_keys_colours(tty, split, strlen(split), &size, &wp->control_fg,
+	    &wp->control_bg);
+
+out:
+	free(copy);
+}
+
 static enum cmd_retval
 cmd_refresh_client_exec(struct cmd *self, struct cmdq_item *item)
 {
@@ -117,8 +229,8 @@ cmd_refresh_client_exec(struct cmd *self, struct cmdq_item *item)
 	struct client		*tc = cmdq_get_target_client(item);
 	struct tty		*tty = &tc->tty;
 	struct window		*w;
-	const char		*size, *errstr, *value;
-	u_int			 x, y, adjust;
+	const char		*errstr;
+	u_int			 adjust;
 	struct args_value	*av;
 
 	if (args_has(args, 'c') ||
@@ -127,10 +239,11 @@ cmd_refresh_client_exec(struct cmd *self, struct cmdq_item *item)
 	    args_has(args, 'U') ||
 	    args_has(args, 'D'))
 	{
-		if (args->argc == 0)
+		if (args_count(args) == 0)
 			adjust = 1;
 		else {
-			adjust = strtonum(args->argv[0], 1, INT_MAX, &errstr);
+			adjust = strtonum(args_string(args, 0), 1, INT_MAX,
+			    &errstr);
 			if (errstr != NULL) {
 				cmdq_error(item, "adjustment %s", errstr);
 				return (CMD_RETURN_ERROR);
@@ -171,54 +284,40 @@ cmd_refresh_client_exec(struct cmd *self, struct cmdq_item *item)
 		return (CMD_RETURN_NORMAL);
 	}
 
-	if (args_has(args, 'l')) {
-		tty_putcode_ptr2(&tc->tty, TTYC_MS, "", "?");
-		return (CMD_RETURN_NORMAL);
-	}
+	if (args_has(args, 'l'))
+		return (cmd_refresh_client_clipboard(self, item));
 
 	if (args_has(args, 'F')) /* -F is an alias for -f */
 		server_client_set_flags(tc, args_get(args, 'F'));
 	if (args_has(args, 'f'))
 		server_client_set_flags(tc, args_get(args, 'f'));
+	if (args_has(args, 'r'))
+		cmd_refresh_report(tty, args_get(args, 'r'));
 
 	if (args_has(args, 'A')) {
 		if (~tc->flags & CLIENT_CONTROL)
 			goto not_control_client;
-		value = args_first_value(args, 'A', &av);
-		while (value != NULL) {
-			cmd_refresh_client_update_offset(tc, value);
-			value = args_next_value(&av);
+		av = args_first_value(args, 'A');
+		while (av != NULL) {
+			cmd_refresh_client_update_offset(tc, av->string);
+			av = args_next_value(av);
 		}
 		return (CMD_RETURN_NORMAL);
 	}
 	if (args_has(args, 'B')) {
 		if (~tc->flags & CLIENT_CONTROL)
 			goto not_control_client;
-		value = args_first_value(args, 'B', &av);
-		while (value != NULL) {
-			cmd_refresh_client_update_subscription(tc, value);
-			value = args_next_value(&av);
+		av = args_first_value(args, 'B');
+		while (av != NULL) {
+			cmd_refresh_client_update_subscription(tc, av->string);
+			av = args_next_value(av);
 		}
 		return (CMD_RETURN_NORMAL);
 	}
 	if (args_has(args, 'C')) {
 		if (~tc->flags & CLIENT_CONTROL)
 			goto not_control_client;
-		size = args_get(args, 'C');
-		if (sscanf(size, "%u,%u", &x, &y) != 2 &&
-		    sscanf(size, "%ux%u", &x, &y) != 2) {
-			cmdq_error(item, "bad size argument");
-			return (CMD_RETURN_ERROR);
-		}
-		if (x < WINDOW_MINIMUM || x > WINDOW_MAXIMUM ||
-		    y < WINDOW_MINIMUM || y > WINDOW_MAXIMUM) {
-			cmdq_error(item, "size too small or too big");
-			return (CMD_RETURN_ERROR);
-		}
-		tty_set_size(&tc->tty, x, y, 0, 0);
-		tc->flags |= CLIENT_SIZECHANGED;
-		recalculate_sizes_now(1);
-		return (CMD_RETURN_NORMAL);
+		return (cmd_refresh_client_control_client_size(self, item));
 	}
 
 	if (args_has(args, 'S')) {

cmd-rename-session.c

@@ -34,7 +34,7 @@ const struct cmd_entry cmd_rename_session_entry = {
 	.name = "rename-session",
 	.alias = "rename",
 
-	.args = { "t:", 1, 1 },
+	.args = { "t:", 1, 1, NULL },
 	.usage = CMD_TARGET_SESSION_USAGE " new-name",
 
 	.target = { 't', CMD_FIND_SESSION, 0 },
@@ -51,8 +51,13 @@ cmd_rename_session_exec(struct cmd *self, struct cmdq_item *item)
 	struct session		*s = target->s;
 	char			*newname, *tmp;
 
-	tmp = format_single_from_target(item, args->argv[0]);
+	tmp = format_single_from_target(item, args_string(args, 0));
 	newname = session_check_name(tmp);
+	if (newname == NULL) {
+		cmdq_error(item, "invalid session: %s", tmp);
+		free(tmp);
+		return (CMD_RETURN_ERROR);
+	}
 	free(tmp);
 	if (strcmp(newname, s->name) == 0) {
 		free(newname);

cmd-rename-window.c

@@ -33,7 +33,7 @@ const struct cmd_entry cmd_rename_window_entry = {
 	.name = "rename-window",
 	.alias = "renamew",
 
-	.args = { "t:", 1, 1 },
+	.args = { "t:", 1, 1, NULL },
 	.usage = CMD_TARGET_WINDOW_USAGE " new-name",
 
 	.target = { 't', CMD_FIND_WINDOW, 0 },
@@ -50,7 +50,7 @@ cmd_rename_window_exec(struct cmd *self, struct cmdq_item *item)
 	struct winlink		*wl = target->wl;
 	char			*newname;
 
-	newname = format_single_from_target(item, args->argv[0]);
+	newname = format_single_from_target(item, args_string(args, 0));
 	window_set_name(wl->window, newname);
 	options_set_number(wl->window->options, "automatic-rename", 0);
 

cmd-resize-pane.c

@@ -36,7 +36,7 @@ const struct cmd_entry cmd_resize_pane_entry = {
 	.name = "resize-pane",
 	.alias = "resizep",
 
-	.args = { "DLMRTt:Ux:y:Z", 0, 1 },
+	.args = { "DLMRTt:Ux:y:Z", 0, 1, NULL },
 	.usage = "[-DLMRTUZ] [-x width] [-y height] " CMD_TARGET_PANE_USAGE " "
 		 "[adjustment]",
 
@@ -60,7 +60,7 @@ cmd_resize_pane_exec(struct cmd *self, struct cmdq_item *item)
 	const char	       	*errstr;
 	char			*cause;
 	u_int			 adjust;
-	int			 x, y;
+	int			 x, y, status;
 	struct grid		*gd = wp->base.grid;
 
 	if (args_has(args, 'T')) {
@@ -87,7 +87,7 @@ cmd_resize_pane_exec(struct cmd *self, struct cmdq_item *item)
 
 	if (args_has(args, 'Z')) {
 		if (w->flags & WINDOW_ZOOMED)
-			window_unzoom(w);
+			window_unzoom(w, 1);
 		else
 			window_zoom(wp);
 		server_redraw_window(w);
@@ -95,10 +95,10 @@ cmd_resize_pane_exec(struct cmd *self, struct cmdq_item *item)
 	}
 	server_unzoom_window(w);
 
-	if (args->argc == 0)
+	if (args_count(args) == 0)
 		adjust = 1;
 	else {
-		adjust = strtonum(args->argv[0], 1, INT_MAX, &errstr);
+		adjust = strtonum(args_string(args, 0), 1, INT_MAX, &errstr);
 		if (errstr != NULL) {
 			cmdq_error(item, "adjustment %s", errstr);
 			return (CMD_RETURN_ERROR);
@@ -121,6 +121,17 @@ cmd_resize_pane_exec(struct cmd *self, struct cmdq_item *item)
 			free(cause);
 			return (CMD_RETURN_ERROR);
 		}
+		status = options_get_number(w->options, "pane-border-status");
+		switch (status) {
+		case PANE_STATUS_TOP:
+			if (y != INT_MAX && wp->yoff == 1)
+				y++;
+			break;
+		case PANE_STATUS_BOTTOM:
+			if (y != INT_MAX && wp->yoff + wp->sy == w->sy - 1)
+				y++;
+			break;
+		}
 		layout_resize_pane_to(wp, LAYOUT_TOPBOTTOM, y);
 	}
 

cmd-resize-window.c

@@ -33,7 +33,7 @@ const struct cmd_entry cmd_resize_window_entry = {
 	.name = "resize-window",
 	.alias = "resizew",
 
-	.args = { "aADLRt:Ux:y:", 0, 1 },
+	.args = { "aADLRt:Ux:y:", 0, 1, NULL },
 	.usage = "[-aADLRU] [-x width] [-y height] " CMD_TARGET_WINDOW_USAGE " "
 		 "[adjustment]",
 
@@ -53,13 +53,12 @@ cmd_resize_window_exec(struct cmd *self, struct cmdq_item *item)
 	struct session		*s = target->s;
 	const char	       	*errstr;
 	char			*cause;
-	u_int			 adjust, sx, sy;
-	int			 xpixel = -1, ypixel = -1;
+	u_int			 adjust, sx, sy, xpixel = 0, ypixel = 0;
 
-	if (args->argc == 0)
+	if (args_count(args) == 0)
 		adjust = 1;
 	else {
-		adjust = strtonum(args->argv[0], 1, INT_MAX, &errstr);
+		adjust = strtonum(args_string(args, 0), 1, INT_MAX, &errstr);
 		if (errstr != NULL) {
 			cmdq_error(item, "adjustment %s", errstr);
 			return (CMD_RETURN_ERROR);
@@ -108,7 +107,9 @@ cmd_resize_window_exec(struct cmd *self, struct cmdq_item *item)
 	}
 
 	options_set_number(w->options, "window-size", WINDOW_SIZE_MANUAL);
-	resize_window(w, sx, sy, xpixel, ypixel);
+	w->manual_sx = sx;
+	w->manual_sy = sy;
+	recalculate_size(w, 1);
 
 	return (CMD_RETURN_NORMAL);
 }

cmd-respawn-pane.c

@@ -34,9 +34,9 @@ const struct cmd_entry cmd_respawn_pane_entry = {
 	.name = "respawn-pane",
 	.alias = "respawnp",
 
-	.args = { "c:e:kt:", 0, -1 },
+	.args = { "c:e:kt:", 0, -1, NULL },
 	.usage = "[-k] [-c start-directory] [-e environment] "
-		 CMD_TARGET_PANE_USAGE " [command]",
+		 CMD_TARGET_PANE_USAGE " [shell-command [argument ...]]",
 
 	.target = { 't', CMD_FIND_PANE, 0 },
 
@@ -49,31 +49,26 @@ cmd_respawn_pane_exec(struct cmd *self, struct cmdq_item *item)
 {
 	struct args		*args = cmd_get_args(self);
 	struct cmd_find_state	*target = cmdq_get_target(item);
-	struct spawn_context	 sc;
+	struct spawn_context	 sc = { 0 };
 	struct session		*s = target->s;
 	struct winlink		*wl = target->wl;
 	struct window_pane	*wp = target->wp;
 	char			*cause = NULL;
-	const char		*add;
-	struct args_value	*value;
+	struct args_value	*av;
 
-	memset(&sc, 0, sizeof sc);
 	sc.item = item;
 	sc.s = s;
 	sc.wl = wl;
 
 	sc.wp0 = wp;
-	sc.lc = NULL;
 
-	sc.name = NULL;
-	sc.argc = args->argc;
-	sc.argv = args->argv;
+	args_to_vector(args, &sc.argc, &sc.argv);
 	sc.environ = environ_create();
 
-	add = args_first_value(args, 'e', &value);
-	while (add != NULL) {
-		environ_put(sc.environ, add, 0);
-		add = args_next_value(&value);
+	av = args_first_value(args, 'e');
+	while (av != NULL) {
+		environ_put(sc.environ, av->string, 0);
+		av = args_next_value(av);
 	}
 
 	sc.idx = -1;
@@ -86,6 +81,9 @@ cmd_respawn_pane_exec(struct cmd *self, struct cmdq_item *item)
 	if (spawn_pane(&sc, &cause) == NULL) {
 		cmdq_error(item, "respawn pane failed: %s", cause);
 		free(cause);
+		if (sc.argv != NULL)
+			cmd_free_argv(sc.argc, sc.argv);
+		environ_free(sc.environ);
 		return (CMD_RETURN_ERROR);
 	}
 
@@ -93,6 +91,8 @@ cmd_respawn_pane_exec(struct cmd *self, struct cmdq_item *item)
 	server_redraw_window_borders(wp->window);
 	server_status_window(wp->window);
 
+	if (sc.argv != NULL)
+		cmd_free_argv(sc.argc, sc.argv);
 	environ_free(sc.environ);
 	return (CMD_RETURN_NORMAL);
 }

cmd-respawn-window.c

@@ -34,9 +34,9 @@ const struct cmd_entry cmd_respawn_window_entry = {
 	.name = "respawn-window",
 	.alias = "respawnw",
 
-	.args = { "c:e:kt:", 0, -1 },
+	.args = { "c:e:kt:", 0, -1, NULL },
 	.usage = "[-k] [-c start-directory] [-e environment] "
-		 CMD_TARGET_WINDOW_USAGE " [command]",
+		 CMD_TARGET_WINDOW_USAGE " [shell-command [argument ...]]",
 
 	.target = { 't', CMD_FIND_WINDOW, 0 },
 
@@ -49,29 +49,25 @@ cmd_respawn_window_exec(struct cmd *self, struct cmdq_item *item)
 {
 	struct args		*args = cmd_get_args(self);
 	struct cmd_find_state	*target = cmdq_get_target(item);
-	struct spawn_context	 sc;
+	struct spawn_context	 sc = { 0 };
 	struct client		*tc = cmdq_get_target_client(item);
 	struct session		*s = target->s;
 	struct winlink		*wl = target->wl;
 	char			*cause = NULL;
-	const char		*add;
-	struct args_value	*value;
+	struct args_value	*av;
 
-	memset(&sc, 0, sizeof sc);
 	sc.item = item;
 	sc.s = s;
 	sc.wl = wl;
 	sc.tc = tc;
 
-	sc.name = NULL;
-	sc.argc = args->argc;
-	sc.argv = args->argv;
+	args_to_vector(args, &sc.argc, &sc.argv);
 	sc.environ = environ_create();
 
-	add = args_first_value(args, 'e', &value);
-	while (add != NULL) {
-		environ_put(sc.environ, add, 0);
-		add = args_next_value(&value);
+	av = args_first_value(args, 'e');
+	while (av != NULL) {
+		environ_put(sc.environ, av->string, 0);
+		av = args_next_value(av);
 	}
 
 	sc.idx = -1;
@@ -84,11 +80,16 @@ cmd_respawn_window_exec(struct cmd *self, struct cmdq_item *item)
 	if (spawn_window(&sc, &cause) == NULL) {
 		cmdq_error(item, "respawn window failed: %s", cause);
 		free(cause);
+		if (sc.argv != NULL)
+			cmd_free_argv(sc.argc, sc.argv);
+		environ_free(sc.environ);
 		return (CMD_RETURN_ERROR);
 	}
 
 	server_redraw_window(wl->window);
 
+	if (sc.argv != NULL)
+		cmd_free_argv(sc.argc, sc.argv);
 	environ_free(sc.environ);
 	return (CMD_RETURN_NORMAL);
 }

cmd-rotate-window.c

@@ -31,7 +31,7 @@ const struct cmd_entry cmd_rotate_window_entry = {
 	.name = "rotate-window",
 	.alias = "rotatew",
 
-	.args = { "Dt:UZ", 0, 0 },
+	.args = { "Dt:UZ", 0, 0, NULL },
 	.usage = "[-DUZ] " CMD_TARGET_WINDOW_USAGE,
 
 	.target = { 't', CMD_FIND_WINDOW, 0 },

cmd-run-shell.c

@@ -30,7 +30,10 @@
  * Runs a command without a window.
  */
 
-static enum cmd_retval	cmd_run_shell_exec(struct cmd *, struct cmdq_item *);
+static enum args_parse_type	cmd_run_shell_args_parse(struct args *, u_int,
+				    char **);
+static enum cmd_retval		cmd_run_shell_exec(struct cmd *,
+				    struct cmdq_item *);
 
 static void	cmd_run_shell_timer(int, short, void *);
 static void	cmd_run_shell_callback(struct job *);
@@ -41,8 +44,9 @@ const struct cmd_entry cmd_run_shell_entry = {
 	.name = "run-shell",
 	.alias = "run",
 
-	.args = { "bd:Ct:", 0, 1 },
-	.usage = "[-bC] [-d delay] " CMD_TARGET_PANE_USAGE " [shell-command]",
+	.args = { "bd:Ct:Es:c:", 0, 1, cmd_run_shell_args_parse },
+	.usage = "[-bCE] [-c start-directory] [-d delay] " CMD_TARGET_PANE_USAGE
+	         " [shell-command]",
 
 	.target = { 't', CMD_FIND_PANE, CMD_FIND_CANFAIL },
 
@@ -51,18 +55,26 @@ const struct cmd_entry cmd_run_shell_entry = {
 };
 
 struct cmd_run_shell_data {
-	struct client		*client;
-	char			*cmd;
-	int			 shell;
-	char			*cwd;
-	struct cmdq_item	*item;
-	struct session		*s;
-	int			 wp_id;
-	struct event		 timer;
-	int			 flags;
-	struct cmd_parse_input	 pi;
+	struct client			*client;
+	char				*cmd;
+	struct args_command_state	*state;
+	char				*cwd;
+	struct cmdq_item		*item;
+	struct session			*s;
+	int				 wp_id;
+	struct event			 timer;
+	int				 flags;
 };
 
+static enum args_parse_type
+cmd_run_shell_args_parse(struct args *args, __unused u_int idx,
+    __unused char **cause)
+{
+	if (args_has(args, 'C'))
+		return (ARGS_PARSE_COMMANDS_OR_STRING);
+	return (ARGS_PARSE_STRING);
+}
+
 static void
 cmd_run_shell_print(struct job *job, const char *msg)
 {
@@ -78,9 +90,10 @@ cmd_run_shell_print(struct job *job, const char *msg)
 			cmdq_print(cdata->item, "%s", msg);
 			return;
 		}
-		if (cmd_find_from_nothing(&fs, 0) != 0)
-			return;
-		wp = fs.wp;
+		if (cdata->item != NULL && cdata->client != NULL)
+			wp = server_client_get_pane(cdata->client);
+		if (wp == NULL && cmd_find_from_nothing(&fs, 0) == 0)
+			wp = fs.wp;
 		if (wp == NULL)
 			return;
 	}
@@ -88,7 +101,7 @@ cmd_run_shell_print(struct job *job, const char *msg)
 	wme = TAILQ_FIRST(&wp->modes);
 	if (wme == NULL || wme->mode != &window_view_mode)
 		window_pane_set_mode(wp, NULL, &window_view_mode, NULL, NULL);
-	window_copy_add(wp, "%s", msg);
+	window_copy_add(wp, 1, "%s", msg);
 }
 
 static enum cmd_retval
@@ -97,10 +110,11 @@ cmd_run_shell_exec(struct cmd *self, struct cmdq_item *item)
 	struct args			*args = cmd_get_args(self);
 	struct cmd_find_state		*target = cmdq_get_target(item);
 	struct cmd_run_shell_data	*cdata;
+	struct client			*c = cmdq_get_client(item);
 	struct client			*tc = cmdq_get_target_client(item);
 	struct session			*s = target->s;
 	struct window_pane		*wp = target->wp;
-	const char			*delay;
+	const char			*delay, *cmd;
 	double				 d;
 	struct timeval			 tv;
 	char				*end;
@@ -112,21 +126,17 @@ cmd_run_shell_exec(struct cmd *self, struct cmdq_item *item)
 			cmdq_error(item, "invalid delay time: %s", delay);
 			return (CMD_RETURN_ERROR);
 		}
-	} else if (args->argc == 0)
+	} else if (args_count(args) == 0)
 		return (CMD_RETURN_NORMAL);
 
 	cdata = xcalloc(1, sizeof *cdata);
-	if (args->argc != 0)
-		cdata->cmd = format_single_from_target(item, args->argv[0]);
-
-	cdata->shell = !args_has(args, 'C');
-	if (!cdata->shell) {
-		memset(&cdata->pi, 0, sizeof cdata->pi);
-		cmd_get_source(self, &cdata->pi.file, &cdata->pi.line);
-		if (wait)
-			cdata->pi.item = item;
-		cdata->pi.c = tc;
-		cmd_find_copy_state(&cdata->pi.fs, target);
+	if (!args_has(args, 'C')) {
+		cmd = args_string(args, 0);
+		if (cmd != NULL)
+			cdata->cmd = format_single_from_target(item, cmd);
+	} else {
+		cdata->state = args_make_commands_prepare(self, item, 0, NULL,
+		    wait, 1);
 	}
 
 	if (args_has(args, 't') && wp != NULL)
@@ -135,7 +145,7 @@ cmd_run_shell_exec(struct cmd *self, struct cmdq_item *item)
 		cdata->wp_id = -1;
 
 	if (wait) {
-		cdata->client = cmdq_get_client(item);
+		cdata->client = c;
 		cdata->item = item;
 	} else {
 		cdata->client = tc;
@@ -143,8 +153,13 @@ cmd_run_shell_exec(struct cmd *self, struct cmdq_item *item)
 	}
 	if (cdata->client != NULL)
 		cdata->client->references++;
+	if (args_has(args, 'c'))
+		cdata->cwd = xstrdup(args_get(args, 'c'));
+	else
+		cdata->cwd = xstrdup(server_client_get_cwd(c, s));
 
-	cdata->cwd = xstrdup(server_client_get_cwd(cmdq_get_client(item), s));
+	if (args_has(args, 'E'))
+		cdata->flags |= JOB_SHOWSTDERR;
 
 	cdata->s = s;
 	if (s != NULL)
@@ -170,34 +185,38 @@ cmd_run_shell_timer(__unused int fd, __unused short events, void* arg)
 	struct cmd_run_shell_data	*cdata = arg;
 	struct client			*c = cdata->client;
 	const char			*cmd = cdata->cmd;
+	struct cmdq_item		*item = cdata->item, *new_item;
+	struct cmd_list			*cmdlist;
 	char				*error;
-	struct cmdq_item		*item = cdata->item;
-	enum cmd_parse_status		 status;
 
-	if (cmd != NULL && cdata->shell) {
-		if (job_run(cmd, 0, NULL, cdata->s, cdata->cwd, NULL,
+	if (cdata->state == NULL) {
+		if (cmd == NULL) {
+			if (cdata->item != NULL)
+				cmdq_continue(cdata->item);
+			cmd_run_shell_free(cdata);
+			return;
+		}
+		if (job_run(cmd, 0, NULL, NULL, cdata->s, cdata->cwd, NULL,
 		    cmd_run_shell_callback, cmd_run_shell_free, cdata,
 		    cdata->flags, -1, -1) == NULL)
 			cmd_run_shell_free(cdata);
 		return;
 	}
 
-	if (cmd != NULL) {
-		if (item != NULL) {
-			status = cmd_parse_and_insert(cmd, &cdata->pi, item,
-			    cmdq_get_state(item), &error);
-		} else {
-			status = cmd_parse_and_append(cmd, &cdata->pi, c, NULL,
-			    &error);
-		}
-		if (status == CMD_PARSE_ERROR) {
-			if (cdata->item == NULL) {
-				*error = toupper((u_char)*error);
-				status_message_set(c, -1, 1, 0, "%s", error);
-			} else
-				cmdq_error(cdata->item, "%s", error);
-			free(error);
-		}
+	cmdlist = args_make_commands(cdata->state, 0, NULL, &error);
+	if (cmdlist == NULL) {
+		if (cdata->item == NULL) {
+			*error = toupper((u_char)*error);
+			status_message_set(c, -1, 1, 0, 0, "%s", error);
+		} else
+			cmdq_error(cdata->item, "%s", error);
+		free(error);
+	} else if (item == NULL) {
+		new_item = cmdq_get_command(cmdlist, NULL);
+		cmdq_append(c, new_item);
+	} else {
+		new_item = cmdq_get_command(cmdlist, cmdq_get_state(item));
+		cmdq_insert_after(item, new_item);
 	}
 
 	if (cdata->item != NULL)
@@ -216,7 +235,8 @@ cmd_run_shell_callback(struct job *job)
 	int				 retcode, status;
 
 	do {
-		if ((line = evbuffer_readline(event->input)) != NULL) {
+		line = evbuffer_readln(event->input, NULL, EVBUFFER_EOL_LF);
+		if (line != NULL) {
 			cmd_run_shell_print(job, line);
 			free(line);
 		}
@@ -265,6 +285,8 @@ cmd_run_shell_free(void *data)
 		session_remove_ref(cdata->s, __func__);
 	if (cdata->client != NULL)
 		server_client_unref(cdata->client);
+	if (cdata->state != NULL)
+		args_make_commands_free(cdata->state);
 	free(cdata->cwd);
 	free(cdata->cmd);
 	free(cdata);

cmd-save-buffer.c

@@ -37,7 +37,7 @@ const struct cmd_entry cmd_save_buffer_entry = {
 	.name = "save-buffer",
 	.alias = "saveb",
 
-	.args = { "ab:", 1, 1 },
+	.args = { "ab:", 1, 1, NULL },
 	.usage = "[-a] " CMD_BUFFER_USAGE " path",
 
 	.flags = CMD_AFTERHOOK,
@@ -48,7 +48,7 @@ const struct cmd_entry cmd_show_buffer_entry = {
 	.name = "show-buffer",
 	.alias = "showb",
 
-	.args = { "b:", 0, 0 },
+	.args = { "b:", 0, 0, NULL },
 	.usage = CMD_BUFFER_USAGE,
 
 	.flags = CMD_AFTERHOOK,
@@ -78,7 +78,8 @@ cmd_save_buffer_exec(struct cmd *self, struct cmdq_item *item)
 	int			 flags;
 	const char		*bufname = args_get(args, 'b'), *bufdata;
 	size_t			 bufsize;
-	char			*path, *tmp;
+	char			*path;
+	struct evbuffer		*evb;
 
 	if (bufname == NULL) {
 		if ((pb = paste_get_top(NULL)) == NULL) {
@@ -96,15 +97,17 @@ cmd_save_buffer_exec(struct cmd *self, struct cmdq_item *item)
 
 	if (cmd_get_entry(self) == &cmd_show_buffer_entry) {
 		if (c->session != NULL || (c->flags & CLIENT_CONTROL)) {
-			utf8_stravisx(&tmp, bufdata, bufsize,
-			    VIS_OCTAL|VIS_CSTYLE|VIS_TAB);
-			cmdq_print(item, "%s", tmp);
-			free(tmp);
+			evb = evbuffer_new();
+			if (evb == NULL)
+				fatalx("out of memory");
+			evbuffer_add(evb, bufdata, bufsize);
+			cmdq_print_data(item, evb);
+			evbuffer_free(evb);
 			return (CMD_RETURN_NORMAL);
 		}
 		path = xstrdup("-");
 	} else
-		path = format_single_from_target(item, args->argv[0]);
+		path = format_single_from_target(item, args_string(args, 0));
 	if (args_has(args, 'a'))
 		flags = O_APPEND;
 	else

cmd-select-layout.c

@@ -33,7 +33,7 @@ const struct cmd_entry cmd_select_layout_entry = {
 	.name = "select-layout",
 	.alias = "selectl",
 
-	.args = { "Enopt:", 0, 1 },
+	.args = { "Enopt:", 0, 1, NULL },
 	.usage = "[-Enop] " CMD_TARGET_PANE_USAGE " [layout-name]",
 
 	.target = { 't', CMD_FIND_PANE, 0 },
@@ -46,7 +46,7 @@ const struct cmd_entry cmd_next_layout_entry = {
 	.name = "next-layout",
 	.alias = "nextl",
 
-	.args = { "t:", 0, 0 },
+	.args = { "t:", 0, 0, NULL },
 	.usage = CMD_TARGET_WINDOW_USAGE,
 
 	.target = { 't', CMD_FIND_WINDOW, 0 },
@@ -59,7 +59,7 @@ const struct cmd_entry cmd_previous_layout_entry = {
 	.name = "previous-layout",
 	.alias = "prevl",
 
-	.args = { "t:", 0, 0 },
+	.args = { "t:", 0, 0, NULL },
 	.usage = CMD_TARGET_WINDOW_USAGE,
 
 	.target = { 't', CMD_FIND_WINDOW, 0 },
@@ -77,7 +77,7 @@ cmd_select_layout_exec(struct cmd *self, struct cmdq_item *item)
 	struct window		*w = wl->window;
 	struct window_pane	*wp = target->wp;
 	const char		*layoutname;
-	char			*oldlayout;
+	char			*oldlayout, *cause;
 	int			 next, previous, layout;
 
 	server_unzoom_window(w);
@@ -105,27 +105,28 @@ cmd_select_layout_exec(struct cmd *self, struct cmdq_item *item)
 		goto changed;
 	}
 
+	if (args_count(args) != 0)
+		layoutname = args_string(args, 0);
+	else if (args_has(args, 'o'))
+		layoutname = oldlayout;
+	else
+		layoutname = NULL;
+
 	if (!args_has(args, 'o')) {
-		if (args->argc == 0)
+		if (layoutname == NULL)
 			layout = w->lastlayout;
 		else
-			layout = layout_set_lookup(args->argv[0]);
+			layout = layout_set_lookup(layoutname);
 		if (layout != -1) {
 			layout_set_select(w, layout);
 			goto changed;
 		}
 	}
 
-	if (args->argc != 0)
-		layoutname = args->argv[0];
-	else if (args_has(args, 'o'))
-		layoutname = oldlayout;
-	else
-		layoutname = NULL;
-
 	if (layoutname != NULL) {
-		if (layout_parse(w, layoutname) == -1) {
-			cmdq_error(item, "can't set layout: %s", layoutname);
+		if (layout_parse(w, layoutname, &cause) == -1) {
+			cmdq_error(item, "%s: %s", cause, layoutname);
+			free(cause);
 			goto error;
 		}
 		goto changed;

cmd-select-pane.c

@@ -33,7 +33,7 @@ const struct cmd_entry cmd_select_pane_entry = {
 	.name = "select-pane",
 	.alias = "selectp",
 
-	.args = { "DdegLlMmP:RT:t:UZ", 0, 0 }, /* -P and -g deprecated */
+	.args = { "DdegLlMmP:RT:t:UZ", 0, 0, NULL }, /* -P and -g deprecated */
 	.usage = "[-DdeLlMmRUZ] [-T title] " CMD_TARGET_PANE_USAGE,
 
 	.target = { 't', CMD_FIND_PANE, 0 },
@@ -46,7 +46,7 @@ const struct cmd_entry cmd_last_pane_entry = {
 	.name = "last-pane",
 	.alias = "lastp",
 
-	.args = { "det:Z", 0, 0 },
+	.args = { "det:Z", 0, 0, NULL },
 	.usage = "[-deZ] " CMD_TARGET_WINDOW_USAGE,
 
 	.target = { 't', CMD_FIND_WINDOW, 0 },
@@ -98,7 +98,11 @@ cmd_select_pane_exec(struct cmd *self, struct cmdq_item *item)
 	struct options_entry	*o;
 
 	if (entry == &cmd_last_pane_entry || args_has(args, 'l')) {
-		lastwp = w->last;
+		/*
+		 * Check for no last pane found in case the other pane was
+		 * spawned without being visited (for example split-window -d).
+		 */
+		lastwp = TAILQ_FIRST(&w->last_panes);
 		if (lastwp == NULL && window_count_panes(w) == 2) {
 			lastwp = TAILQ_PREV(w->active, window_panes, entry);
 			if (lastwp == NULL)
@@ -145,10 +149,14 @@ cmd_select_pane_exec(struct cmd *self, struct cmdq_item *item)
 		markedwp = marked_pane.wp;
 
 		if (lastwp != NULL) {
+			lastwp->flags |= (PANE_REDRAW|PANE_STYLECHANGED|
+			    PANE_THEMECHANGED);
 			server_redraw_window_borders(lastwp->window);
 			server_status_window(lastwp->window);
 		}
 		if (markedwp != NULL) {
+			markedwp->flags |= (PANE_REDRAW|PANE_STYLECHANGED|
+			    PANE_THEMECHANGED);
 			server_redraw_window_borders(markedwp->window);
 			server_status_window(markedwp->window);
 		}
@@ -163,7 +171,7 @@ cmd_select_pane_exec(struct cmd *self, struct cmdq_item *item)
 			return (CMD_RETURN_ERROR);
 		}
 		options_set_string(oo, "window-active-style", 0, "%s", style);
-		wp->flags |= (PANE_REDRAW|PANE_STYLECHANGED);
+		wp->flags |= (PANE_REDRAW|PANE_STYLECHANGED|PANE_THEMECHANGED);
 	}
 	if (args_has(args, 'g')) {
 		cmdq_print(item, "%s", options_get_string(oo, "window-style"));

cmd-select-window.c

@@ -33,7 +33,7 @@ const struct cmd_entry cmd_select_window_entry = {
 	.name = "select-window",
 	.alias = "selectw",
 
-	.args = { "lnpTt:", 0, 0 },
+	.args = { "lnpTt:", 0, 0, NULL },
 	.usage = "[-lnpT] " CMD_TARGET_WINDOW_USAGE,
 
 	.target = { 't', CMD_FIND_WINDOW, 0 },
@@ -46,7 +46,7 @@ const struct cmd_entry cmd_next_window_entry = {
 	.name = "next-window",
 	.alias = "next",
 
-	.args = { "at:", 0, 0 },
+	.args = { "at:", 0, 0, NULL },
 	.usage = "[-a] " CMD_TARGET_SESSION_USAGE,
 
 	.target = { 't', CMD_FIND_SESSION, 0 },
@@ -59,7 +59,7 @@ const struct cmd_entry cmd_previous_window_entry = {
 	.name = "previous-window",
 	.alias = "prev",
 
-	.args = { "at:", 0, 0 },
+	.args = { "at:", 0, 0, NULL },
 	.usage = "[-a] " CMD_TARGET_SESSION_USAGE,
 
 	.target = { 't', CMD_FIND_SESSION, 0 },
@@ -72,7 +72,7 @@ const struct cmd_entry cmd_last_window_entry = {
 	.name = "last-window",
 	.alias = "last",
 
-	.args = { "t:", 0, 0 },
+	.args = { "t:", 0, 0, NULL },
 	.usage = CMD_TARGET_SESSION_USAGE,
 
 	.target = { 't', CMD_FIND_SESSION, 0 },

cmd-send-keys.c

@@ -33,13 +33,13 @@ const struct cmd_entry cmd_send_keys_entry = {
 	.name = "send-keys",
 	.alias = "send",
 
-	.args = { "FHlMN:Rt:X", 0, -1 },
-	.usage = "[-FHlMRX] [-N repeat-count] " CMD_TARGET_PANE_USAGE
-	         " key ...",
+	.args = { "c:FHKlMN:Rt:X", 0, -1, NULL },
+	.usage = "[-FHKlMRX] [-c target-client] [-N repeat-count] "
+	         CMD_TARGET_PANE_USAGE " [key ...]",
 
 	.target = { 't', CMD_FIND_PANE, 0 },
 
-	.flags = CMD_AFTERHOOK,
+	.flags = CMD_AFTERHOOK|CMD_CLIENT_CFLAG|CMD_CLIENT_CANFAIL,
 	.exec = cmd_send_keys_exec
 };
 
@@ -47,7 +47,7 @@ const struct cmd_entry cmd_send_prefix_entry = {
 	.name = "send-prefix",
 	.alias = NULL,
 
-	.args = { "2t:", 0, 0 },
+	.args = { "2t:", 0, 0, NULL },
 	.usage = "[-2] " CMD_TARGET_PANE_USAGE,
 
 	.target = { 't', CMD_FIND_PANE, 0 },
@@ -58,7 +58,7 @@ const struct cmd_entry cmd_send_prefix_entry = {
 
 static struct cmdq_item *
 cmd_send_keys_inject_key(struct cmdq_item *item, struct cmdq_item *after,
-    key_code key)
+    struct args *args, key_code key)
 {
 	struct cmd_find_state		*target = cmdq_get_target(item);
 	struct client			*tc = cmdq_get_target_client(item);
@@ -66,8 +66,22 @@ cmd_send_keys_inject_key(struct cmdq_item *item, struct cmdq_item *after,
 	struct winlink			*wl = target->wl;
 	struct window_pane		*wp = target->wp;
 	struct window_mode_entry	*wme;
-	struct key_table		*table;
+	struct key_table		*table = NULL;
 	struct key_binding		*bd;
+	struct key_event		*event;
+
+	if (args_has(args, 'K')) {
+		if (tc == NULL)
+			return (item);
+		event = xcalloc(1, sizeof *event);
+		event->key = key|KEYC_SENT;
+		memset(&event->m, 0, sizeof event->m);
+		if (server_client_handle_key(tc, event) == 0) {
+			free(event->buf);
+			free(event);
+		}
+		return (item);
+	}
 
 	wme = TAILQ_FIRST(&wp->modes);
 	if (wme == NULL || wme->mode->key_table == NULL) {
@@ -90,7 +104,7 @@ static struct cmdq_item *
 cmd_send_keys_inject_string(struct cmdq_item *item, struct cmdq_item *after,
     struct args *args, int i)
 {
-	const char		*s = args->argv[i];
+	const char		*s = args_string(args, i);
 	struct utf8_data	*ud, *loop;
 	utf8_char		 uc;
 	key_code		 key;
@@ -102,14 +116,16 @@ cmd_send_keys_inject_string(struct cmdq_item *item, struct cmdq_item *after,
 		n = strtol(s, &endptr, 16);
 		if (*s =='\0' || n < 0 || n > 0xff || *endptr != '\0')
 			return (item);
-		return (cmd_send_keys_inject_key(item, after, KEYC_LITERAL|n));
+		return (cmd_send_keys_inject_key(item, after, args,
+		    KEYC_LITERAL|n));
 	}
 
 	literal = args_has(args, 'l');
 	if (!literal) {
 		key = key_string_lookup_string(s);
 		if (key != KEYC_NONE && key != KEYC_UNKNOWN) {
-			after = cmd_send_keys_inject_key(item, after, key);
+			after = cmd_send_keys_inject_key(item, after, args,
+			    key);
 			if (after != NULL)
 				return (after);
 		}
@@ -125,7 +141,8 @@ cmd_send_keys_inject_string(struct cmdq_item *item, struct cmdq_item *after,
 					continue;
 				key = uc;
 			}
-			after = cmd_send_keys_inject_key(item, after, key);
+			after = cmd_send_keys_inject_key(item, after, args,
+			    key);
 		}
 		free(ud);
 	}
@@ -145,19 +162,20 @@ cmd_send_keys_exec(struct cmd *self, struct cmdq_item *item)
 	struct mouse_event		*m = &event->m;
 	struct window_mode_entry	*wme = TAILQ_FIRST(&wp->modes);
 	struct cmdq_item		*after = item;
-	int				 i;
 	key_code			 key;
-	u_int				 np = 1;
+	u_int				 i, np = 1;
+	u_int				 count = args_count(args);
 	char				*cause = NULL;
 
 	if (args_has(args, 'N')) {
-		np = args_strtonum(args, 'N', 1, UINT_MAX, &cause);
+		np = args_strtonum_and_expand(args, 'N', 1, UINT_MAX, item,
+			 &cause);
 		if (cause != NULL) {
 			cmdq_error(item, "repeat count %s", cause);
 			free(cause);
 			return (CMD_RETURN_ERROR);
 		}
-		if (wme != NULL && (args_has(args, 'X') || args->argc == 0)) {
+		if (wme != NULL && (args_has(args, 'X') || count == 0)) {
 			if (wme->mode->command == NULL) {
 				cmdq_error(item, "not in a mode");
 				return (CMD_RETURN_ERROR);
@@ -192,17 +210,26 @@ cmd_send_keys_exec(struct cmd *self, struct cmdq_item *item)
 			key = options_get_number(s->options, "prefix2");
 		else
 			key = options_get_number(s->options, "prefix");
-		cmd_send_keys_inject_key(item, item, key);
+		cmd_send_keys_inject_key(item, item, args, key);
 		return (CMD_RETURN_NORMAL);
 	}
 
 	if (args_has(args, 'R')) {
-		window_pane_reset_palette(wp);
+		colour_palette_clear(&wp->palette);
 		input_reset(wp->ictx, 1);
+		wp->flags |= (PANE_STYLECHANGED|PANE_THEMECHANGED|PANE_REDRAW);
+	}
+
+	if (count == 0) {
+		if (args_has(args, 'N') || args_has(args, 'R'))
+			return (CMD_RETURN_NORMAL);
+		for (; np != 0; np--)
+			cmd_send_keys_inject_key(item, NULL, args, event->key);
+		return (CMD_RETURN_NORMAL);
 	}
 
 	for (; np != 0; np--) {
-		for (i = 0; i < args->argc; i++) {
+		for (i = 0; i < count; i++) {
 			after = cmd_send_keys_inject_string(item, after, args,
 			    i);
 		}

cmd-server-access.c

@@ -0,0 +1,147 @@
+/* $OpenBSD$ */
+
+/*
+ * Copyright (c) 2021 Dallas Lyons <dallasdlyons@gmail.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
+ * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include <pwd.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "tmux.h"
+
+/*
+ * Controls access to session.
+ */
+
+static enum cmd_retval cmd_server_access_exec(struct cmd *, struct cmdq_item *);
+
+const struct cmd_entry cmd_server_access_entry = {
+	.name = "server-access",
+	.alias = NULL,
+
+	.args = { "adlrw", 0, 1, NULL },
+	.usage = "[-adlrw] " CMD_TARGET_PANE_USAGE " [user]",
+
+	.flags = CMD_CLIENT_CANFAIL,
+	.exec = cmd_server_access_exec
+};
+
+static enum cmd_retval
+cmd_server_access_deny(struct cmdq_item *item, struct passwd *pw)
+{
+	struct client		*loop;
+	struct server_acl_user	*user;
+	uid_t			 uid;
+
+	if ((user = server_acl_user_find(pw->pw_uid)) == NULL) {
+		cmdq_error(item, "user %s not found", pw->pw_name);
+		return (CMD_RETURN_ERROR);
+	}
+	TAILQ_FOREACH(loop, &clients, entry) {
+		uid = proc_get_peer_uid(loop->peer);
+		if (uid == server_acl_get_uid(user)) {
+			loop->exit_message = xstrdup("access not allowed");
+			loop->flags |= CLIENT_EXIT;
+		}
+	}
+	server_acl_user_deny(pw->pw_uid);
+
+	return (CMD_RETURN_NORMAL);
+}
+
+static enum cmd_retval
+cmd_server_access_exec(struct cmd *self, struct cmdq_item *item)
+{
+
+	struct args	*args = cmd_get_args(self);
+	struct client	*c = cmdq_get_target_client(item);
+	char		*name;
+	struct passwd	*pw = NULL;
+
+	if (args_has(args, 'l')) {
+		server_acl_display(item);
+		return (CMD_RETURN_NORMAL);
+	}
+	if (args_count(args) == 0) {
+		cmdq_error(item, "missing user argument");
+		return (CMD_RETURN_ERROR);
+	}
+
+	name = format_single(item, args_string(args, 0), c, NULL, NULL, NULL);
+	if (*name != '\0')
+		pw = getpwnam(name);
+	if (pw == NULL) {
+		cmdq_error(item, "unknown user: %s", name);
+		return (CMD_RETURN_ERROR);
+	}
+	free(name);
+
+	if (pw->pw_uid == 0 || pw->pw_uid == getuid()) {
+		cmdq_error(item, "%s owns the server, can't change access",
+		    pw->pw_name);
+		return (CMD_RETURN_ERROR);
+	}
+
+	if (args_has(args, 'a') && args_has(args, 'd')) {
+		cmdq_error(item, "-a and -d cannot be used together");
+		return (CMD_RETURN_ERROR);
+	}
+	if (args_has(args, 'w') && args_has(args, 'r')) {
+		cmdq_error(item, "-r and -w cannot be used together");
+		return (CMD_RETURN_ERROR);
+	}
+
+	if (args_has(args, 'd'))
+		return (cmd_server_access_deny(item, pw));
+	if (args_has(args, 'a')) {
+		if (server_acl_user_find(pw->pw_uid) != NULL) {
+			cmdq_error(item, "user %s is already added",
+			    pw->pw_name);
+			return (CMD_RETURN_ERROR);
+		}
+		server_acl_user_allow(pw->pw_uid);
+		/* Do not return - allow -r or -w with -a. */
+	} else if (args_has(args, 'r') || args_has(args, 'w')) {
+		/* -r or -w implies -a if user does not exist. */
+		if (server_acl_user_find(pw->pw_uid) == NULL)
+			server_acl_user_allow(pw->pw_uid);
+	}
+
+	if (args_has(args, 'w')) {
+		if (server_acl_user_find(pw->pw_uid) == NULL) {
+			cmdq_error(item, "user %s not found", pw->pw_name);
+			return (CMD_RETURN_ERROR);
+		}
+		server_acl_user_allow_write(pw->pw_uid);
+		return (CMD_RETURN_NORMAL);
+	}
+
+	if (args_has(args, 'r')) {
+		if (server_acl_user_find(pw->pw_uid) == NULL) {
+			cmdq_error(item, "user %s not found", pw->pw_name);
+			return (CMD_RETURN_ERROR);
+		}
+		server_acl_user_deny_write(pw->pw_uid);
+		return (CMD_RETURN_NORMAL);
+	}
+
+	return (CMD_RETURN_NORMAL);
+}

cmd-set-buffer.c

@@ -33,9 +33,9 @@ const struct cmd_entry cmd_set_buffer_entry = {
 	.name = "set-buffer",
 	.alias = "setb",
 
-	.args = { "ab:t:n:w", 0, 1 },
+	.args = { "ab:t:n:w", 0, 1, NULL },
 	.usage = "[-aw] " CMD_BUFFER_USAGE " [-n new-buffer-name] "
-	         CMD_TARGET_CLIENT_USAGE " data",
+	         CMD_TARGET_CLIENT_USAGE " [data]",
 
 	.flags = CMD_AFTERHOOK|CMD_CLIENT_TFLAG|CMD_CLIENT_CANFAIL,
 	.exec = cmd_set_buffer_exec
@@ -45,7 +45,7 @@ const struct cmd_entry cmd_delete_buffer_entry = {
 	.name = "delete-buffer",
 	.alias = "deleteb",
 
-	.args = { "b:", 0, 0 },
+	.args = { "b:", 0, 0, NULL },
 	.usage = CMD_BUFFER_USAGE,
 
 	.flags = CMD_AFTERHOOK,
@@ -69,8 +69,13 @@ cmd_set_buffer_exec(struct cmd *self, struct cmdq_item *item)
 		pb = paste_get_name(bufname);
 
 	if (cmd_get_entry(self) == &cmd_delete_buffer_entry) {
-		if (pb == NULL)
+		if (pb == NULL) {
+			if (bufname != NULL) {
+				cmdq_error(item, "unknown buffer: %s", bufname);
+				return (CMD_RETURN_ERROR);
+			}
 			pb = paste_get_top(&bufname);
+		}
 		if (pb == NULL) {
 			cmdq_error(item, "no buffer");
 			return (CMD_RETURN_ERROR);
@@ -80,8 +85,13 @@ cmd_set_buffer_exec(struct cmd *self, struct cmdq_item *item)
 	}
 
 	if (args_has(args, 'n')) {
-		if (pb == NULL)
+		if (pb == NULL) {
+			if (bufname != NULL) {
+				cmdq_error(item, "unknown buffer: %s", bufname);
+				return (CMD_RETURN_ERROR);
+			}
 			pb = paste_get_top(&bufname);
+		}
 		if (pb == NULL) {
 			cmdq_error(item, "no buffer");
 			return (CMD_RETURN_ERROR);
@@ -94,11 +104,11 @@ cmd_set_buffer_exec(struct cmd *self, struct cmdq_item *item)
 		return (CMD_RETURN_NORMAL);
 	}
 
-	if (args->argc != 1) {
+	if (args_count(args) != 1) {
 		cmdq_error(item, "no data specified");
 		return (CMD_RETURN_ERROR);
 	}
-	if ((newsize = strlen(args->argv[0])) == 0)
+	if ((newsize = strlen(args_string(args, 0))) == 0)
 		return (CMD_RETURN_NORMAL);
 
 	bufsize = 0;
@@ -111,7 +121,7 @@ cmd_set_buffer_exec(struct cmd *self, struct cmdq_item *item)
 	}
 
 	bufdata = xrealloc(bufdata, bufsize + newsize);
-	memcpy(bufdata + bufsize, args->argv[0], newsize);
+	memcpy(bufdata + bufsize, args_string(args, 0), newsize);
 	bufsize += newsize;
 
 	if (paste_set(bufdata, bufsize, bufname, &cause) != 0) {
@@ -121,7 +131,7 @@ cmd_set_buffer_exec(struct cmd *self, struct cmdq_item *item)
 		return (CMD_RETURN_ERROR);
 	}
 	if (args_has(args, 'w') && tc != NULL)
- 		tty_set_selection(&tc->tty, bufdata, bufsize);
+ 		tty_set_selection(&tc->tty, "", bufdata, bufsize);
 
 	return (CMD_RETURN_NORMAL);
 }

cmd-set-environment.c

@@ -34,8 +34,8 @@ const struct cmd_entry cmd_set_environment_entry = {
 	.name = "set-environment",
 	.alias = "setenv",
 
-	.args = { "Fhgrt:u", 1, 2 },
-	.usage = "[-Fhgru] " CMD_TARGET_SESSION_USAGE " name [value]",
+	.args = { "Fhgrt:u", 1, 2, NULL },
+	.usage = "[-Fhgru] " CMD_TARGET_SESSION_USAGE " variable [value]",
 
 	.target = { 't', CMD_FIND_SESSION, CMD_FIND_CANFAIL },
 
@@ -49,11 +49,11 @@ cmd_set_environment_exec(struct cmd *self, struct cmdq_item *item)
 	struct args		*args = cmd_get_args(self);
 	struct cmd_find_state	*target = cmdq_get_target(item);
 	struct environ		*env;
-	const char		*name, *value, *tflag;
-	char			*expand = NULL;
+	const char		*name = args_string(args, 0), *value;
+	const char		*tflag;
+	char			*expanded = NULL;
 	enum cmd_retval		 retval = CMD_RETURN_NORMAL;
 
-	name = args->argv[0];
 	if (*name == '\0') {
 		cmdq_error(item, "empty variable name");
 		return (CMD_RETURN_ERROR);
@@ -63,13 +63,14 @@ cmd_set_environment_exec(struct cmd *self, struct cmdq_item *item)
 		return (CMD_RETURN_ERROR);
 	}
 
-	if (args->argc < 2)
+	if (args_count(args) < 2)
 		value = NULL;
-	else if (args_has(args, 'F'))
-		value = expand = format_single_from_target(item, args->argv[1]);
 	else
-		value = args->argv[1];
-
+		value = args_string(args, 1);
+	if (value != NULL && args_has(args, 'F')) {
+		expanded = format_single_from_target(item, value);
+		value = expanded;
+	}
 	if (args_has(args, 'g'))
 		env = global_environ;
 	else {
@@ -113,6 +114,6 @@ cmd_set_environment_exec(struct cmd *self, struct cmdq_item *item)
 	}
 
 out:
-	free(expand);
+	free(expanded);
 	return (retval);
 }

cmd-set-option.c

@@ -27,13 +27,16 @@
  * Set an option.
  */
 
-static enum cmd_retval	cmd_set_option_exec(struct cmd *, struct cmdq_item *);
+static enum args_parse_type	cmd_set_option_args_parse(struct args *,
+				    u_int, char **);
+static enum cmd_retval		cmd_set_option_exec(struct cmd *,
+				    struct cmdq_item *);
 
 const struct cmd_entry cmd_set_option_entry = {
 	.name = "set-option",
 	.alias = "set",
 
-	.args = { "aFgopqst:uUw", 1, 2 },
+	.args = { "aFgopqst:uUw", 1, 2, cmd_set_option_args_parse },
 	.usage = "[-aFgopqsuUw] " CMD_TARGET_PANE_USAGE " option [value]",
 
 	.target = { 't', CMD_FIND_PANE, CMD_FIND_CANFAIL },
@@ -46,7 +49,7 @@ const struct cmd_entry cmd_set_window_option_entry = {
 	.name = "set-window-option",
 	.alias = "setw",
 
-	.args = { "aFgoqt:u", 1, 2 },
+	.args = { "aFgoqt:u", 1, 2, cmd_set_option_args_parse },
 	.usage = "[-aFgoqu] " CMD_TARGET_WINDOW_USAGE " option [value]",
 
 	.target = { 't', CMD_FIND_WINDOW, CMD_FIND_CANFAIL },
@@ -59,7 +62,7 @@ const struct cmd_entry cmd_set_hook_entry = {
 	.name = "set-hook",
 	.alias = NULL,
 
-	.args = { "agpRt:uw", 1, 2 },
+	.args = { "agpRt:uw", 1, 2, cmd_set_option_args_parse },
 	.usage = "[-agpRuw] " CMD_TARGET_PANE_USAGE " hook [command]",
 
 	.target = { 't', CMD_FIND_PANE, CMD_FIND_CANFAIL },
@@ -68,6 +71,15 @@ const struct cmd_entry cmd_set_hook_entry = {
 	.exec = cmd_set_option_exec
 };
 
+static enum args_parse_type
+cmd_set_option_args_parse(__unused struct args *args, u_int idx,
+    __unused char **cause)
+{
+	if (idx == 1)
+		return (ARGS_PARSE_COMMANDS_OR_STRING);
+	return (ARGS_PARSE_STRING);
+}
+
 static enum cmd_retval
 cmd_set_option_exec(struct cmd *self, struct cmdq_item *item)
 {
@@ -77,14 +89,16 @@ cmd_set_option_exec(struct cmd *self, struct cmdq_item *item)
 	struct window_pane		*loop;
 	struct options			*oo;
 	struct options_entry		*parent, *o, *po;
-	char				*name, *argument, *value = NULL, *cause;
+	char				*name, *argument, *expanded = NULL;
+	char				*cause;
+	const char			*value;
 	int				 window, idx, already, error, ambiguous;
 	int				 scope;
 
 	window = (cmd_get_entry(self) == &cmd_set_window_option_entry);
 
 	/* Expand argument. */
-	argument = format_single_from_target(item, args->argv[0]);
+	argument = format_single_from_target(item, args_string(args, 0));
 
 	/* If set-hook -R, fire the hook straight away. */
 	if (cmd_get_entry(self) == &cmd_set_hook_entry && args_has(args, 'R')) {
@@ -104,12 +118,14 @@ cmd_set_option_exec(struct cmd *self, struct cmdq_item *item)
 			cmdq_error(item, "invalid option: %s", argument);
 		goto fail;
 	}
-	if (args->argc < 2)
+	if (args_count(args) < 2)
 		value = NULL;
-	else if (args_has(args, 'F'))
-		value = format_single_from_target(item, args->argv[1]);
 	else
-		value = xstrdup(args->argv[1]);
+		value = args_string(args, 1);
+	if (value != NULL && args_has(args, 'F')) {
+		expanded = format_single_from_target(item, value);
+		value = expanded;
+	}
 
 	/* Get the scope and table for the option .*/
 	scope = options_scope_from_name(args, window, name, target, &oo,
@@ -211,13 +227,13 @@ cmd_set_option_exec(struct cmd *self, struct cmdq_item *item)
 
 out:
 	free(argument);
-	free(value);
+	free(expanded);
 	free(name);
 	return (CMD_RETURN_NORMAL);
 
 fail:
 	free(argument);
-	free(value);
+	free(expanded);
 	free(name);
 	return (CMD_RETURN_ERROR);
 }

cmd-show-environment.c

@@ -38,8 +38,8 @@ const struct cmd_entry cmd_show_environment_entry = {
 	.name = "show-environment",
 	.alias = "showenv",
 
-	.args = { "hgst:", 0, 1 },
-	.usage = "[-hgs] " CMD_TARGET_SESSION_USAGE " [name]",
+	.args = { "hgst:", 0, 1, NULL },
+	.usage = "[-hgs] " CMD_TARGET_SESSION_USAGE " [variable]",
 
 	.target = { 't', CMD_FIND_SESSION, CMD_FIND_CANFAIL },
 
@@ -101,7 +101,7 @@ cmd_show_environment_exec(struct cmd *self, struct cmdq_item *item)
 	struct cmd_find_state	*target = cmdq_get_target(item);
 	struct environ		*env;
 	struct environ_entry	*envent;
-	const char		*tflag;
+	const char		*tflag, *name = args_string(args, 0);
 
 	if ((tflag = args_get(args, 't')) != NULL) {
 		if (target->s == NULL) {
@@ -124,10 +124,10 @@ cmd_show_environment_exec(struct cmd *self, struct cmdq_item *item)
 		env = target->s->environ;
 	}
 
-	if (args->argc != 0) {
-		envent = environ_find(env, args->argv[0]);
+	if (name != NULL) {
+		envent = environ_find(env, name);
 		if (envent == NULL) {
-			cmdq_error(item, "unknown variable: %s", args->argv[0]);
+			cmdq_error(item, "unknown variable: %s", name);
 			return (CMD_RETURN_ERROR);
 		}
 		cmd_show_environment_print(self, item, envent);

cmd-show-messages.c

@@ -38,7 +38,7 @@ const struct cmd_entry cmd_show_messages_entry = {
 	.name = "show-messages",
 	.alias = "showmsgs",
 
-	.args = { "JTt:", 0, 0 },
+	.args = { "JTt:", 0, 0, NULL },
 	.usage = "[-JT] " CMD_TARGET_CLIENT_USAGE,
 
 	.flags = CMD_AFTERHOOK|CMD_CLIENT_TFLAG,

cmd-show-options.c

@@ -38,7 +38,7 @@ const struct cmd_entry cmd_show_options_entry = {
 	.name = "show-options",
 	.alias = "show",
 
-	.args = { "AgHpqst:vw", 0, 1 },
+	.args = { "AgHpqst:vw", 0, 1, NULL },
 	.usage = "[-AgHpqsvw] " CMD_TARGET_PANE_USAGE " [option]",
 
 	.target = { 't', CMD_FIND_PANE, CMD_FIND_CANFAIL },
@@ -51,7 +51,7 @@ const struct cmd_entry cmd_show_window_options_entry = {
 	.name = "show-window-options",
 	.alias = "showw",
 
-	.args = { "gvt:", 0, 1 },
+	.args = { "gvt:", 0, 1, NULL },
 	.usage = "[-gv] " CMD_TARGET_WINDOW_USAGE " [option]",
 
 	.target = { 't', CMD_FIND_WINDOW, CMD_FIND_CANFAIL },
@@ -64,8 +64,8 @@ const struct cmd_entry cmd_show_hooks_entry = {
 	.name = "show-hooks",
 	.alias = NULL,
 
-	.args = { "gpt:w", 0, 1 },
-	.usage = "[-gpw] " CMD_TARGET_PANE_USAGE,
+	.args = { "gpt:w", 0, 1, NULL },
+	.usage = "[-gpw] " CMD_TARGET_PANE_USAGE " [hook]",
 
 	.target = { 't', CMD_FIND_PANE, CMD_FIND_CANFAIL },
 
@@ -85,7 +85,7 @@ cmd_show_options_exec(struct cmd *self, struct cmdq_item *item)
 
 	window = (cmd_get_entry(self) == &cmd_show_window_options_entry);
 
-	if (args->argc == 0) {
+	if (args_count(args) == 0) {
 		scope = options_scope_from_flags(args, window, target, &oo,
 		    &cause);
 		if (scope == OPTIONS_TABLE_NONE) {
@@ -97,12 +97,12 @@ cmd_show_options_exec(struct cmd *self, struct cmdq_item *item)
 		}
 		return (cmd_show_options_all(self, item, scope, oo));
 	}
-	argument = format_single_from_target(item, args->argv[0]);
+	argument = format_single_from_target(item, args_string(args, 0));
 
 	name = options_match(argument, &idx, &ambiguous);
 	if (name == NULL) {
 		if (args_has(args, 'q'))
-			goto fail;
+			goto out;
 		if (ambiguous)
 			cmdq_error(item, "ambiguous option: %s", argument);
 		else
@@ -113,7 +113,7 @@ cmd_show_options_exec(struct cmd *self, struct cmdq_item *item)
 	    &cause);
 	if (scope == OPTIONS_TABLE_NONE) {
 		if (args_has(args, 'q'))
-			goto fail;
+			goto out;
 		cmdq_error(item, "%s", cause);
 		free(cause);
 		goto fail;
@@ -126,7 +126,14 @@ cmd_show_options_exec(struct cmd *self, struct cmdq_item *item)
 		parent = 0;
 	if (o != NULL)
 		cmd_show_options_print(self, item, o, idx, parent);
+	else if (*name == '@') {
+		if (args_has(args, 'q'))
+			goto out;
+		cmdq_error(item, "invalid option: %s", argument);
+		goto fail;
+	}
 
+out:
 	free(name);
 	free(argument);
 	return (CMD_RETURN_NORMAL);

cmd-show-prompt-history.c

@@ -0,0 +1,108 @@
+/* $OpenBSD$ */
+
+/*
+ * Copyright (c) 2021 Anindya Mukherjee <anindya49@hotmail.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
+ * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "tmux.h"
+
+#include <stdlib.h>
+
+/*
+ * Show or clear prompt history.
+ */
+
+static enum cmd_retval	cmd_show_prompt_history_exec(struct cmd *,
+			    struct cmdq_item *);
+
+const struct cmd_entry cmd_show_prompt_history_entry = {
+	.name = "show-prompt-history",
+	.alias = "showphist",
+
+	.args = { "T:", 0, 0, NULL },
+	.usage = "[-T prompt-type]",
+
+	.flags = CMD_AFTERHOOK,
+	.exec = cmd_show_prompt_history_exec
+};
+
+const struct cmd_entry cmd_clear_prompt_history_entry = {
+	.name = "clear-prompt-history",
+	.alias = "clearphist",
+
+	.args = { "T:", 0, 0, NULL },
+	.usage = "[-T prompt-type]",
+
+	.flags = CMD_AFTERHOOK,
+	.exec = cmd_show_prompt_history_exec
+};
+
+static enum cmd_retval
+cmd_show_prompt_history_exec(struct cmd *self, struct cmdq_item *item)
+{
+	struct args		*args = cmd_get_args(self);
+	const char		*typestr = args_get(args, 'T');
+	enum prompt_type	 type;
+	u_int			 tidx, hidx;
+
+	if (cmd_get_entry(self) == &cmd_clear_prompt_history_entry) {
+		if (typestr == NULL) {
+			for (tidx = 0; tidx < PROMPT_NTYPES; tidx++) {
+				free(status_prompt_hlist[tidx]);
+				status_prompt_hlist[tidx] = NULL;
+				status_prompt_hsize[tidx] = 0;
+			}
+		} else {
+			type = status_prompt_type(typestr);
+			if (type == PROMPT_TYPE_INVALID) {
+				cmdq_error(item, "invalid type: %s", typestr);
+				return (CMD_RETURN_ERROR);
+			}
+			free(status_prompt_hlist[type]);
+			status_prompt_hlist[type] = NULL;
+			status_prompt_hsize[type] = 0;
+		}
+
+		return (CMD_RETURN_NORMAL);
+	}
+
+	if (typestr == NULL) {
+		for (tidx = 0; tidx < PROMPT_NTYPES; tidx++) {
+			cmdq_print(item, "History for %s:\n",
+			    status_prompt_type_string(tidx));
+			for (hidx = 0; hidx < status_prompt_hsize[tidx];
+			    hidx++) {
+				cmdq_print(item, "%d: %s", hidx + 1,
+				    status_prompt_hlist[tidx][hidx]);
+			}
+			cmdq_print(item, "%s", "");
+		}
+	} else {
+		type = status_prompt_type(typestr);
+		if (type == PROMPT_TYPE_INVALID) {
+			cmdq_error(item, "invalid type: %s", typestr);
+			return (CMD_RETURN_ERROR);
+		}
+		cmdq_print(item, "History for %s:\n",
+		    status_prompt_type_string(type));
+		for (hidx = 0; hidx < status_prompt_hsize[type]; hidx++) {
+			cmdq_print(item, "%d: %s", hidx + 1,
+			    status_prompt_hlist[type][hidx]);
+		}
+		cmdq_print(item, "%s", "");
+	}
+
+	return (CMD_RETURN_NORMAL);
+}

cmd-source-file.c

@@ -29,14 +29,19 @@
  * Sources a configuration file.
  */
 
+#define CMD_SOURCE_FILE_DEPTH_LIMIT 50
+static u_int cmd_source_file_depth;
+
 static enum cmd_retval	cmd_source_file_exec(struct cmd *, struct cmdq_item *);
 
 const struct cmd_entry cmd_source_file_entry = {
 	.name = "source-file",
 	.alias = "source",
 
-	.args = { "Fnqv", 1, -1 },
-	.usage = "[-Fnqv] path ...",
+	.args = { "t:Fnqv", 1, -1, NULL },
+	.usage = "[-Fnqv] " CMD_TARGET_PANE_USAGE " path ...",
+
+	.target = { 't', CMD_FIND_PANE, CMD_FIND_CANFAIL },
 
 	.flags = 0,
 	.exec = cmd_source_file_exec
@@ -57,6 +62,16 @@ struct cmd_source_file_data {
 static enum cmd_retval
 cmd_source_file_complete_cb(struct cmdq_item *item, __unused void *data)
 {
+	struct client	*c = cmdq_get_client(item);
+
+	if (c == NULL) {
+		cmd_source_file_depth--;
+		log_debug("%s: depth now %u", __func__, cmd_source_file_depth);
+	} else {
+		c->source_file_depth--;
+		log_debug("%s: depth now %u", __func__, c->source_file_depth);
+	}
+
 	cfg_print_causes(item);
 	return (CMD_RETURN_NORMAL);
 }
@@ -65,14 +80,19 @@ static void
 cmd_source_file_complete(struct client *c, struct cmd_source_file_data *cdata)
 {
 	struct cmdq_item	*new_item;
+	u_int			 i;
 
 	if (cfg_finished) {
-		if (cdata->retval == CMD_RETURN_ERROR && c->session == NULL)
+		if (cdata->retval == CMD_RETURN_ERROR &&
+		    c != NULL &&
+		    c->session == NULL)
 			c->retval = 1;
 		new_item = cmdq_get_callback(cmd_source_file_complete_cb, NULL);
 		cmdq_insert_after(cdata->after, new_item);
 	}
 
+	for (i = 0; i < cdata->nfiles; i++)
+		free(cdata->files[i]);
 	free(cdata->files);
 	free(cdata);
 }
@@ -87,6 +107,7 @@ cmd_source_file_done(struct client *c, const char *path, int error,
 	size_t				 bsize = EVBUFFER_LENGTH(buffer);
 	u_int				 n;
 	struct cmdq_item		*new_item;
+	struct cmd_find_state		*target = cmdq_get_target(item);
 
 	if (!closed)
 		return;
@@ -95,7 +116,7 @@ cmd_source_file_done(struct client *c, const char *path, int error,
 		cmdq_error(item, "%s: %s", path, strerror(error));
 	else if (bsize != 0) {
 		if (load_cfg_from_buffer(bdata, bsize, path, c, cdata->after,
-		    cdata->flags, &new_item) < 0)
+		    target, cdata->flags, &new_item) < 0)
 			cdata->retval = CMD_RETURN_ERROR;
 		else if (new_item != NULL)
 			cdata->after = new_item;
@@ -113,7 +134,16 @@ cmd_source_file_done(struct client *c, const char *path, int error,
 static void
 cmd_source_file_add(struct cmd_source_file_data *cdata, const char *path)
 {
+	char	resolved[PATH_MAX];
+
+	if (realpath(path, resolved) == NULL) {
+		log_debug("%s: realpath(\"%s\") failed: %s", __func__,
+			path, strerror(errno));
+	} else
+		path = resolved;
+
 	log_debug("%s: %s", __func__, path);
+
 	cdata->files = xreallocarray(cdata->files, cdata->nfiles + 1,
 	    sizeof *cdata->files);
 	cdata->files[cdata->nfiles++] = xstrdup(path);
@@ -126,11 +156,27 @@ cmd_source_file_exec(struct cmd *self, struct cmdq_item *item)
 	struct cmd_source_file_data	*cdata;
 	struct client			*c = cmdq_get_client(item);
 	enum cmd_retval			 retval = CMD_RETURN_NORMAL;
-	char				*pattern, *cwd, *expand = NULL;
+	char				*pattern, *cwd, *expanded = NULL;
 	const char			*path, *error;
 	glob_t				 g;
-	int				 i, result;
-	u_int				 j;
+	int				 result;
+	u_int				 i, j;
+
+	if (c == NULL) {
+		if (cmd_source_file_depth >= CMD_SOURCE_FILE_DEPTH_LIMIT) {
+			cmdq_error(item, "too many nested files");
+			return (CMD_RETURN_ERROR);
+		}
+		cmd_source_file_depth++;
+		log_debug("%s: depth now %u", __func__, cmd_source_file_depth);
+	} else {
+		if (c->source_file_depth >= CMD_SOURCE_FILE_DEPTH_LIMIT) {
+			cmdq_error(item, "too many nested files");
+			return (CMD_RETURN_ERROR);
+		}
+		c->source_file_depth++;
+		log_debug("%s: depth now %u", __func__, c->source_file_depth);
+	}
 
 	cdata = xcalloc(1, sizeof *cdata);
 	cdata->item = item;
@@ -144,13 +190,13 @@ cmd_source_file_exec(struct cmd *self, struct cmdq_item *item)
 
 	utf8_stravis(&cwd, server_client_get_cwd(c, NULL), VIS_GLOB);
 
-	for (i = 0; i < args->argc; i++) {
+	for (i = 0; i < args_count(args); i++) {
+		path = args_string(args, i);
 		if (args_has(args, 'F')) {
-			free(expand);
-			expand = format_single_from_target(item, args->argv[i]);
-			path = expand;
-		} else
-			path = args->argv[i];
+			free(expanded);
+			expanded = format_single_from_target(item, path);
+			path = expanded;
+		}
 		if (strcmp(path, "-") == 0) {
 			cmd_source_file_add(cdata, "-");
 			continue;
@@ -174,15 +220,17 @@ cmd_source_file_exec(struct cmd *self, struct cmdq_item *item)
 				cmdq_error(item, "%s: %s", path, error);
 				retval = CMD_RETURN_ERROR;
 			}
+			globfree(&g);
 			free(pattern);
 			continue;
 		}
-		free(expand);
 		free(pattern);
 
 		for (j = 0; j < g.gl_pathc; j++)
 			cmd_source_file_add(cdata, g.gl_pathv[j]);
+		globfree(&g);
 	}
+	free(expanded);
 
 	cdata->after = item;
 	cdata->retval = retval;

cmd-split-window.c

@@ -39,9 +39,10 @@ const struct cmd_entry cmd_split_window_entry = {
 	.name = "split-window",
 	.alias = "splitw",
 
-	.args = { "bc:de:fF:hIl:p:Pt:vZ", 0, -1 },
+	.args = { "bc:de:fF:hIl:p:Pt:vZ", 0, -1, NULL },
 	.usage = "[-bdefhIPvZ] [-c start-directory] [-e environment] "
-		 "[-F format] [-l size] " CMD_TARGET_PANE_USAGE " [command]",
+		 "[-F format] [-l size] " CMD_TARGET_PANE_USAGE
+		 " [shell-command [argument ...]]",
 
 	.target = { 't', CMD_FIND_PANE, 0 },
 
@@ -55,70 +56,65 @@ cmd_split_window_exec(struct cmd *self, struct cmdq_item *item)
 	struct args		*args = cmd_get_args(self);
 	struct cmd_find_state	*current = cmdq_get_current(item);
 	struct cmd_find_state	*target = cmdq_get_target(item);
-	struct spawn_context	 sc;
+	struct spawn_context	 sc = { 0 };
 	struct client		*tc = cmdq_get_target_client(item);
 	struct session		*s = target->s;
 	struct winlink		*wl = target->wl;
+	struct window		*w = wl->window;
 	struct window_pane	*wp = target->wp, *new_wp;
 	enum layout_type	 type;
 	struct layout_cell	*lc;
 	struct cmd_find_state	 fs;
-	int			 size, percentage, flags, input;
-	const char		*template, *add, *errstr, *p;
-	char			*cause, *cp, *copy;
-	size_t			 plen;
-	struct args_value	*value;
+	int			 size, flags, input;
+	const char		*template;
+	char			*cause = NULL, *cp;
+	struct args_value	*av;
+	u_int			 count = args_count(args), curval = 0;
 
+	type = LAYOUT_TOPBOTTOM;
 	if (args_has(args, 'h'))
 		type = LAYOUT_LEFTRIGHT;
-	else
-		type = LAYOUT_TOPBOTTOM;
-	if ((p = args_get(args, 'l')) != NULL) {
-		plen = strlen(p);
-		if (p[plen - 1] == '%') {
-			copy = xstrdup(p);
-			copy[plen - 1] = '\0';
-			percentage = strtonum(copy, 0, INT_MAX, &errstr);
-			free(copy);
-			if (errstr != NULL) {
-				cmdq_error(item, "percentage %s", errstr);
-				return (CMD_RETURN_ERROR);
-			}
+
+	/* If the 'p' flag is dropped then this bit can be moved into 'l'. */
+	if (args_has(args, 'l') || args_has(args, 'p')) {
+		if (args_has(args, 'f')) {
 			if (type == LAYOUT_TOPBOTTOM)
-				size = (wp->sy * percentage) / 100;
+				curval = w->sy;
 			else
-				size = (wp->sx * percentage) / 100;
+				curval = w->sx;
 		} else {
-			size = args_strtonum(args, 'l', 0, INT_MAX, &cause);
-			if (cause != NULL) {
-				cmdq_error(item, "lines %s", cause);
-				free(cause);
-				return (CMD_RETURN_ERROR);
-			}
+			if (type == LAYOUT_TOPBOTTOM)
+				curval = wp->sy;
+			else
+				curval = wp->sx;
 		}
+	}
+
+	size = -1;
+	if (args_has(args, 'l')) {
+		size = args_percentage_and_expand(args, 'l', 0, INT_MAX, curval,
+		    item, &cause);
 	} else if (args_has(args, 'p')) {
-		percentage = args_strtonum(args, 'p', 0, INT_MAX, &cause);
-		if (cause != NULL) {
-			cmdq_error(item, "create pane failed: -p %s", cause);
-			free(cause);
-			return (CMD_RETURN_ERROR);
-		}
-		if (type == LAYOUT_TOPBOTTOM)
-			size = (wp->sy * percentage) / 100;
-		else
-			size = (wp->sx * percentage) / 100;
-	} else
-		size = -1;
+		size = args_strtonum_and_expand(args, 'p', 0, 100, item,
+		    &cause);
+		if (cause == NULL)
+			size = curval * size / 100;
+	}
+	if (cause != NULL) {
+		cmdq_error(item, "size %s", cause);
+		free(cause);
+		return (CMD_RETURN_ERROR);
+	}
 
 	window_push_zoom(wp->window, 1, args_has(args, 'Z'));
-	input = (args_has(args, 'I') && args->argc == 0);
+	input = (args_has(args, 'I') && count == 0);
 
 	flags = 0;
 	if (args_has(args, 'b'))
 		flags |= SPAWN_BEFORE;
 	if (args_has(args, 'f'))
 		flags |= SPAWN_FULLSIZE;
-	if (input || (args->argc == 1 && *args->argv[0] == '\0'))
+	if (input || (count == 1 && *args_string(args, 0) == '\0'))
 		flags |= SPAWN_EMPTY;
 
 	lc = layout_split_pane(wp, type, size, flags);
@@ -127,7 +123,6 @@ cmd_split_window_exec(struct cmd *self, struct cmdq_item *item)
 		return (CMD_RETURN_ERROR);
 	}
 
-	memset(&sc, 0, sizeof sc);
 	sc.item = item;
 	sc.s = s;
 	sc.wl = wl;
@@ -135,15 +130,13 @@ cmd_split_window_exec(struct cmd *self, struct cmdq_item *item)
 	sc.wp0 = wp;
 	sc.lc = lc;
 
-	sc.name = NULL;
-	sc.argc = args->argc;
-	sc.argv = args->argv;
+	args_to_vector(args, &sc.argc, &sc.argv);
 	sc.environ = environ_create();
 
-	add = args_first_value(args, 'e', &value);
-	while (add != NULL) {
-		environ_put(sc.environ, add, 0);
-		add = args_next_value(&value);
+	av = args_first_value(args, 'e');
+	while (av != NULL) {
+		environ_put(sc.environ, av->string, 0);
+		av = args_next_value(av);
 	}
 
 	sc.idx = -1;
@@ -158,15 +151,27 @@ cmd_split_window_exec(struct cmd *self, struct cmdq_item *item)
 	if ((new_wp = spawn_pane(&sc, &cause)) == NULL) {
 		cmdq_error(item, "create pane failed: %s", cause);
 		free(cause);
+		if (sc.argv != NULL)
+			cmd_free_argv(sc.argc, sc.argv);
+		environ_free(sc.environ);
 		return (CMD_RETURN_ERROR);
 	}
-	if (input && window_pane_start_input(new_wp, item, &cause) != 0) {
-		server_client_remove_pane(new_wp);
-		layout_close_pane(new_wp);
-		window_remove_pane(wp->window, new_wp);
-		cmdq_error(item, "%s", cause);
-		free(cause);
-		return (CMD_RETURN_ERROR);
+	if (input) {
+		switch (window_pane_start_input(new_wp, item, &cause)) {
+		case -1:
+			server_client_remove_pane(new_wp);
+			layout_close_pane(new_wp);
+			window_remove_pane(wp->window, new_wp);
+			cmdq_error(item, "%s", cause);
+			free(cause);
+			if (sc.argv != NULL)
+				cmd_free_argv(sc.argc, sc.argv);
+			environ_free(sc.environ);
+			return (CMD_RETURN_ERROR);
+		case 1:
+			input = 0;
+			break;
+		}
 	}
 	if (!args_has(args, 'd'))
 		cmd_find_from_winlink_pane(current, wl, new_wp, 0);
@@ -185,6 +190,8 @@ cmd_split_window_exec(struct cmd *self, struct cmdq_item *item)
 	cmd_find_from_winlink_pane(&fs, wl, new_wp, 0);
 	cmdq_insert_hook(s, item, &fs, "after-split-window");
 
+	if (sc.argv != NULL)
+		cmd_free_argv(sc.argc, sc.argv);
 	environ_free(sc.environ);
 	if (input)
 		return (CMD_RETURN_WAIT);

cmd-swap-pane.c

@@ -32,7 +32,7 @@ const struct cmd_entry cmd_swap_pane_entry = {
 	.name = "swap-pane",
 	.alias = "swapp",
 
-	.args = { "dDs:t:UZ", 0, 0 },
+	.args = { "dDs:t:UZ", 0, 0, NULL },
 	.usage = "[-dDUZ] " CMD_SRCDST_PANE_USAGE,
 
 	.source = { 's', CMD_FIND_PANE, CMD_FIND_DEFAULT_MARKED },
@@ -101,10 +101,10 @@ cmd_swap_pane_exec(struct cmd *self, struct cmdq_item *item)
 
 	src_wp->window = dst_w;
 	options_set_parent(src_wp->options, dst_w->options);
-	src_wp->flags |= PANE_STYLECHANGED;
+	src_wp->flags |= (PANE_STYLECHANGED|PANE_THEMECHANGED);
 	dst_wp->window = src_w;
 	options_set_parent(dst_wp->options, src_w->options);
-	dst_wp->flags |= PANE_STYLECHANGED;
+	dst_wp->flags |= (PANE_STYLECHANGED|PANE_THEMECHANGED);
 
 	sx = src_wp->sx; sy = src_wp->sy;
 	xoff = src_wp->xoff; yoff = src_wp->yoff;
@@ -128,14 +128,20 @@ cmd_swap_pane_exec(struct cmd *self, struct cmdq_item *item)
 			window_set_active_pane(dst_w, src_wp, 1);
 	}
 	if (src_w != dst_w) {
-		if (src_w->last == src_wp)
-			src_w->last = NULL;
-		if (dst_w->last == dst_wp)
-			dst_w->last = NULL;
+		window_pane_stack_remove(&src_w->last_panes, src_wp);
+		window_pane_stack_remove(&dst_w->last_panes, dst_wp);
+		colour_palette_from_option(&src_wp->palette, src_wp->options);
+		colour_palette_from_option(&dst_wp->palette, dst_wp->options);
+		layout_fix_panes(src_w, NULL);
+		server_redraw_window(src_w);
 	}
-	server_redraw_window(src_w);
+	layout_fix_panes(dst_w, NULL);
 	server_redraw_window(dst_w);
 
+	notify_window("window-layout-changed", src_w);
+	if (src_w != dst_w)
+		notify_window("window-layout-changed", dst_w);
+
 out:
 	if (window_pop_zoom(src_w))
 		server_redraw_window(src_w);

cmd-swap-window.c

@@ -32,7 +32,7 @@ const struct cmd_entry cmd_swap_window_entry = {
 	.name = "swap-window",
 	.alias = "swapw",
 
-	.args = { "ds:t:", 0, 0 },
+	.args = { "ds:t:", 0, 0, NULL },
 	.usage = "[-d] " CMD_SRCDST_WINDOW_USAGE,
 
 	.source = { 's', CMD_FIND_WINDOW, CMD_FIND_DEFAULT_MARKED },

cmd-switch-client.c

@@ -34,7 +34,7 @@ const struct cmd_entry cmd_switch_client_entry = {
 	.name = "switch-client",
 	.alias = "switchc",
 
-	.args = { "lc:EFnpt:rT:Z", 0, 0 },
+	.args = { "lc:EFnpt:rT:Z", 0, 0, NULL },
 	.usage = "[-ElnprZ] [-c target-client] [-t target-session] "
 		 "[-T key-table]",
 
@@ -134,23 +134,9 @@ cmd_switch_client_exec(struct cmd *self, struct cmdq_item *item)
 	if (!args_has(args, 'E'))
 		environ_update(s->options, tc->environ, s->environ);
 
-	if (tc->session != NULL && tc->session != s)
-		tc->last_session = tc->session;
-	tc->session = s;
+	server_client_set_session(tc, s);
 	if (~cmdq_get_flags(item) & CMDQ_STATE_REPEAT)
 		server_client_set_key_table(tc, NULL);
-	tty_update_client_offset(tc);
-	status_timer_start(tc);
-	notify_client("client-session-changed", tc);
-	session_update_activity(s, NULL);
-	gettimeofday(&s->last_attached_time, NULL);
-
-	server_check_unattached();
-	server_redraw_client(tc);
-	s->curw->flags &= ~WINLINK_ALERTFLAGS;
-	s->curw->window->latest = tc;
-	recalculate_sizes();
-	alerts_check_session(s);
 
 	return (CMD_RETURN_NORMAL);
 }

cmd-unbind-key.c

@@ -32,7 +32,7 @@ const struct cmd_entry cmd_unbind_key_entry = {
 	.name = "unbind-key",
 	.alias = "unbind",
 
-	.args = { "anqT:", 0, 1 },
+	.args = { "anqT:", 0, 1, NULL },
 	.usage = "[-anq] [-T key-table] key",
 
 	.flags = CMD_AFTERHOOK,
@@ -44,11 +44,11 @@ cmd_unbind_key_exec(struct cmd *self, struct cmdq_item *item)
 {
 	struct args	*args = cmd_get_args(self);
 	key_code	 key;
-	const char	*tablename;
+	const char	*tablename, *keystr = args_string(args, 0);
 	int		 quiet = args_has(args, 'q');
 
 	if (args_has(args, 'a')) {
-		if (args->argc != 0) {
+		if (keystr != NULL) {
 			if (!quiet)
 				cmdq_error(item, "key given with -a");
 			return (CMD_RETURN_ERROR);
@@ -73,16 +73,16 @@ cmd_unbind_key_exec(struct cmd *self, struct cmdq_item *item)
 		return (CMD_RETURN_NORMAL);
 	}
 
-	if (args->argc != 1) {
+	if (keystr == NULL) {
 		if (!quiet)
 			cmdq_error(item, "missing key");
 		return (CMD_RETURN_ERROR);
 	}
 
-	key = key_string_lookup_string(args->argv[0]);
+	key = key_string_lookup_string(keystr);
 	if (key == KEYC_NONE || key == KEYC_UNKNOWN) {
 		if (!quiet)
-			cmdq_error(item, "unknown key: %s", args->argv[0]);
+			cmdq_error(item, "unknown key: %s", keystr);
 		return (CMD_RETURN_ERROR);
 	}
 

cmd-wait-for.c

@@ -34,7 +34,7 @@ const struct cmd_entry cmd_wait_for_entry = {
 	.name = "wait-for",
 	.alias = "wait",
 
-	.args = { "LSU", 1, 1 },
+	.args = { "LSU", 1, 1, NULL },
 	.usage = "[-L|-S|-U] channel",
 
 	.flags = 0,
@@ -121,11 +121,11 @@ static enum cmd_retval
 cmd_wait_for_exec(struct cmd *self, struct cmdq_item *item)
 {
 	struct args     	*args = cmd_get_args(self);
-	const char		*name = args->argv[0];
-	struct wait_channel	*wc, wc0;
+	const char		*name = args_string(args, 0);
+	struct wait_channel	*wc, find;
 
-	wc0.name = name;
-	wc = RB_FIND(wait_channels, &wait_channels, &wc0);
+	find.name = name;
+	wc = RB_FIND(wait_channels, &wait_channels, &find);
 
 	if (args_has(args, 'S'))
 		return (cmd_wait_for_signal(item, name, wc));

cmd.c

@@ -35,6 +35,7 @@ extern const struct cmd_entry cmd_choose_buffer_entry;
 extern const struct cmd_entry cmd_choose_client_entry;
 extern const struct cmd_entry cmd_choose_tree_entry;
 extern const struct cmd_entry cmd_clear_history_entry;
+extern const struct cmd_entry cmd_clear_prompt_history_entry;
 extern const struct cmd_entry cmd_clock_mode_entry;
 extern const struct cmd_entry cmd_command_prompt_entry;
 extern const struct cmd_entry cmd_confirm_before_entry;
@@ -46,7 +47,6 @@ extern const struct cmd_entry cmd_display_menu_entry;
 extern const struct cmd_entry cmd_display_message_entry;
 extern const struct cmd_entry cmd_display_popup_entry;
 extern const struct cmd_entry cmd_display_panes_entry;
-extern const struct cmd_entry cmd_down_pane_entry;
 extern const struct cmd_entry cmd_find_window_entry;
 extern const struct cmd_entry cmd_has_session_entry;
 extern const struct cmd_entry cmd_if_shell_entry;
@@ -94,6 +94,7 @@ extern const struct cmd_entry cmd_select_pane_entry;
 extern const struct cmd_entry cmd_select_window_entry;
 extern const struct cmd_entry cmd_send_keys_entry;
 extern const struct cmd_entry cmd_send_prefix_entry;
+extern const struct cmd_entry cmd_server_access_entry;
 extern const struct cmd_entry cmd_set_buffer_entry;
 extern const struct cmd_entry cmd_set_environment_entry;
 extern const struct cmd_entry cmd_set_hook_entry;
@@ -104,6 +105,7 @@ extern const struct cmd_entry cmd_show_environment_entry;
 extern const struct cmd_entry cmd_show_hooks_entry;
 extern const struct cmd_entry cmd_show_messages_entry;
 extern const struct cmd_entry cmd_show_options_entry;
+extern const struct cmd_entry cmd_show_prompt_history_entry;
 extern const struct cmd_entry cmd_show_window_options_entry;
 extern const struct cmd_entry cmd_source_file_entry;
 extern const struct cmd_entry cmd_split_window_entry;
@@ -114,7 +116,6 @@ extern const struct cmd_entry cmd_swap_window_entry;
 extern const struct cmd_entry cmd_switch_client_entry;
 extern const struct cmd_entry cmd_unbind_key_entry;
 extern const struct cmd_entry cmd_unlink_window_entry;
-extern const struct cmd_entry cmd_up_pane_entry;
 extern const struct cmd_entry cmd_wait_for_entry;
 
 const struct cmd_entry *cmd_table[] = {
@@ -126,6 +127,7 @@ const struct cmd_entry *cmd_table[] = {
 	&cmd_choose_client_entry,
 	&cmd_choose_tree_entry,
 	&cmd_clear_history_entry,
+	&cmd_clear_prompt_history_entry,
 	&cmd_clock_mode_entry,
 	&cmd_command_prompt_entry,
 	&cmd_confirm_before_entry,
@@ -184,6 +186,7 @@ const struct cmd_entry *cmd_table[] = {
 	&cmd_select_window_entry,
 	&cmd_send_keys_entry,
 	&cmd_send_prefix_entry,
+	&cmd_server_access_entry,
 	&cmd_set_buffer_entry,
 	&cmd_set_environment_entry,
 	&cmd_set_hook_entry,
@@ -194,6 +197,7 @@ const struct cmd_entry *cmd_table[] = {
 	&cmd_show_hooks_entry,
 	&cmd_show_messages_entry,
 	&cmd_show_options_entry,
+	&cmd_show_prompt_history_entry,
 	&cmd_show_window_options_entry,
 	&cmd_source_file_entry,
 	&cmd_split_window_entry,
@@ -217,10 +221,6 @@ struct cmd {
 	char			 *file;
 	u_int			  line;
 
-	char			 *alias;
-	int			  argc;
-	char			**argv;
-
 	TAILQ_ENTRY(cmd)	  qentry;
 };
 TAILQ_HEAD(cmds, cmd);
@@ -247,7 +247,7 @@ cmd_log_argv(int argc, char **argv, const char *fmt, ...)
 
 /* Prepend to an argument vector. */
 void
-cmd_prepend_argv(int *argc, char ***argv, char *arg)
+cmd_prepend_argv(int *argc, char ***argv, const char *arg)
 {
 	char	**new_argv;
 	int	  i;
@@ -264,7 +264,7 @@ cmd_prepend_argv(int *argc, char ***argv, char *arg)
 
 /* Append to an argument vector. */
 void
-cmd_append_argv(int *argc, char ***argv, char *arg)
+cmd_append_argv(int *argc, char ***argv, const char *arg)
 {
 	*argv = xreallocarray(*argv, (*argc) + 1, sizeof **argv);
 	(*argv)[(*argc)++] = xstrdup(arg);
@@ -444,7 +444,7 @@ cmd_get_alias(const char *name)
 }
 
 /* Look up a command entry by name. */
-static const struct cmd_entry *
+const struct cmd_entry *
 cmd_find(const char *name, char **cause)
 {
 	const struct cmd_entry	**loop, *entry, *found = NULL;
@@ -495,31 +495,32 @@ ambiguous:
 
 /* Parse a single command from an argument vector. */
 struct cmd *
-cmd_parse(int argc, char **argv, const char *file, u_int line, char **cause)
+cmd_parse(struct args_value *values, u_int count, const char *file, u_int line,
+    char **cause)
 {
 	const struct cmd_entry	*entry;
-	const char		*name;
 	struct cmd		*cmd;
 	struct args		*args;
+	char			*error = NULL;
 
-	if (argc == 0) {
+	if (count == 0 || values[0].type != ARGS_STRING) {
 		xasprintf(cause, "no command");
 		return (NULL);
 	}
-	name = argv[0];
-
-	entry = cmd_find(name, cause);
+	entry = cmd_find(values[0].string, cause);
 	if (entry == NULL)
 		return (NULL);
-	cmd_log_argv(argc, argv, "%s: %s", __func__, entry->name);
 
-	args = args_parse(entry->args.template, argc, argv);
-	if (args == NULL)
-		goto usage;
-	if (entry->args.lower != -1 && args->argc < entry->args.lower)
-		goto usage;
-	if (entry->args.upper != -1 && args->argc > entry->args.upper)
-		goto usage;
+	args = args_parse(&entry->args, values, count, &error);
+	if (args == NULL && error == NULL) {
+		xasprintf(cause, "usage: %s %s", entry->name, entry->usage);
+		return (NULL);
+	}
+	if (args == NULL) {
+		xasprintf(cause, "command %s: %s", entry->name, error);
+		free(error);
+		return (NULL);
+	}
 
 	cmd = xcalloc(1, sizeof *cmd);
 	cmd->entry = entry;
@@ -529,32 +530,36 @@ cmd_parse(int argc, char **argv, const char *file, u_int line, char **cause)
 		cmd->file = xstrdup(file);
 	cmd->line = line;
 
-	cmd->alias = NULL;
-	cmd->argc = argc;
-	cmd->argv = cmd_copy_argv(argc, argv);
-
 	return (cmd);
-
-usage:
-	if (args != NULL)
-		args_free(args);
-	xasprintf(cause, "usage: %s %s", entry->name, entry->usage);
-	return (NULL);
 }
 
 /* Free a command. */
 void
 cmd_free(struct cmd *cmd)
 {
-	free(cmd->alias);
-	cmd_free_argv(cmd->argc, cmd->argv);
-
 	free(cmd->file);
 
 	args_free(cmd->args);
 	free(cmd);
 }
 
+/* Copy a command. */
+struct cmd *
+cmd_copy(struct cmd *cmd, int argc, char **argv)
+{
+	struct cmd	*new_cmd;
+
+	new_cmd = xcalloc(1, sizeof *new_cmd);
+	new_cmd->entry = cmd->entry;
+	new_cmd->args = args_copy(cmd->args, argc, argv);
+
+	if (cmd->file != NULL)
+		new_cmd->file = xstrdup(cmd->file);
+	new_cmd->line = cmd->line;
+
+	return (new_cmd);
+}
+
 /* Get a command as a string. */
 char *
 cmd_print(struct cmd *cmd)
@@ -593,7 +598,18 @@ cmd_list_append(struct cmd_list *cmdlist, struct cmd *cmd)
 	TAILQ_INSERT_TAIL(cmdlist->list, cmd, qentry);
 }
 
-/* Move all commands from one command list to another */
+/* Append all commands from one list to another.  */
+void
+cmd_list_append_all(struct cmd_list *cmdlist, struct cmd_list *from)
+{
+	struct cmd	*cmd;
+
+	TAILQ_FOREACH(cmd, from->list, qentry)
+		cmd->group = cmdlist->group;
+	TAILQ_CONCAT(cmdlist->list, from->list, qentry);
+}
+
+/* Move all commands from one command list to another. */
 void
 cmd_list_move(struct cmd_list *cmdlist, struct cmd_list *from)
 {
@@ -618,9 +634,40 @@ cmd_list_free(struct cmd_list *cmdlist)
 	free(cmdlist);
 }
 
+/* Copy a command list, expanding %s in arguments. */
+struct cmd_list *
+cmd_list_copy(const struct cmd_list *cmdlist, int argc, char **argv)
+{
+	struct cmd	*cmd;
+	struct cmd_list	*new_cmdlist;
+	struct cmd	*new_cmd;
+	u_int		 group = cmdlist->group;
+	char		*s;
+
+	s = cmd_list_print(cmdlist, 0);
+	log_debug("%s: %s", __func__, s);
+	free(s);
+
+	new_cmdlist = cmd_list_new();
+	TAILQ_FOREACH(cmd, cmdlist->list, qentry) {
+		if (cmd->group != group) {
+			new_cmdlist->group = cmd_list_next_group++;
+			group = cmd->group;
+		}
+		new_cmd = cmd_copy(cmd, argc, argv);
+		cmd_list_append(new_cmdlist, new_cmd);
+	}
+
+	s = cmd_list_print(new_cmdlist, 0);
+	log_debug("%s: %s", __func__, s);
+	free(s);
+
+	return (new_cmdlist);
+}
+
 /* Get a command list as a string. */
 char *
-cmd_list_print(struct cmd_list *cmdlist, int escaped)
+cmd_list_print(const struct cmd_list *cmdlist, int escaped)
 {
 	struct cmd	*cmd, *next;
 	char		*buf, *this;
@@ -763,10 +810,14 @@ cmd_mouse_pane(struct mouse_event *m, struct session **sp,
 
 	if ((wl = cmd_mouse_window(m, sp)) == NULL)
 		return (NULL);
-	if ((wp = window_pane_find_by_id(m->wp)) == NULL)
-		return (NULL);
-	if (!window_has_pane(wl->window, wp))
-		return (NULL);
+	if (m->wp == -1)
+		wp = wl->window->active;
+	else {
+		if ((wp = window_pane_find_by_id(m->wp)) == NULL)
+			return (NULL);
+		if (!window_has_pane(wl->window, wp))
+			return (NULL);
+	}
 
 	if (wlp != NULL)
 		*wlp = wl;

colour.c

@@ -105,6 +105,21 @@ colour_split_rgb(int c, u_char *r, u_char *g, u_char *b)
 	*b = c & 0xff;
 }
 
+/* Force colour to RGB if not already. */
+int
+colour_force_rgb(int c)
+{
+	if (c & COLOUR_FLAG_RGB)
+		return (c);
+	if (c & COLOUR_FLAG_256)
+		return (colour_256toRGB(c));
+	if (c >= 0 && c <= 7)
+		return (colour_256toRGB(c));
+	if (c >= 90 && c <= 97)
+		return (colour_256toRGB(8 + c - 90));
+	return (-1);
+}
+
 /* Convert colour to a string. */
 const char *
 colour_tostring(int c)
@@ -113,7 +128,7 @@ colour_tostring(int c)
 	u_char		r, g, b;
 
 	if (c == -1)
-		return ("invalid");
+		return ("none");
 
 	if (c & COLOUR_FLAG_RGB) {
 		colour_split_rgb(c, &r, &g, &b);
@@ -167,6 +182,46 @@ colour_tostring(int c)
 	return ("invalid");
 }
 
+/* Convert background colour to theme. */
+enum client_theme
+colour_totheme(int c)
+{
+	int	r, g, b, brightness;
+
+	if (c == -1)
+		return (THEME_UNKNOWN);
+
+	if (c & COLOUR_FLAG_RGB) {
+		r = (c >> 16) & 0xff;
+		g = (c >> 8) & 0xff;
+		b = (c >> 0) & 0xff;
+
+		brightness = r + g + b;
+		if (brightness > 382)
+			return (THEME_LIGHT);
+		return (THEME_DARK);
+	}
+
+	if (c & COLOUR_FLAG_256)
+		return (colour_totheme(colour_256toRGB(c)));
+
+	switch (c) {
+	case 0:
+	case 90:
+		return (THEME_DARK);
+	case 7:
+	case 97:
+		return (THEME_LIGHT);
+	default:
+		if (c >= 0 && c <= 7)
+			return (colour_totheme(colour_256toRGB(c)));
+		if (c >= 90 && c <= 97)
+			return (colour_totheme(colour_256toRGB(8 + c - 90)));
+		break;
+	}
+	return (THEME_UNKNOWN);
+}
+
 /* Convert colour from string. */
 int
 colour_fromstring(const char *s)
@@ -927,13 +982,17 @@ colour_byname(const char *name)
 		{ "yellow3", 0xcdcd00 },
 		{ "yellow4", 0x8b8b00 }
 	};
-	u_int	i;
-	int	c;
+	u_int		 i;
+	int		 c;
+	const char	*errstr;
 
 	if (strncmp(name, "grey", 4) == 0 || strncmp(name, "gray", 4) == 0) {
-		if (!isdigit((u_char)name[4]))
+		if (name[4] == '\0')
 			return (0xbebebe|COLOUR_FLAG_RGB);
-		c = round(2.55 * atoi(name + 4));
+		c = strtonum(name + 4, 0, 100, &errstr);
+		if (errstr != NULL)
+			return (-1);
+		c = round(2.55 * c);
 		if (c < 0 || c > 255)
 			return (-1);
 		return (colour_join_rgb(c, c, c));
@@ -944,3 +1003,155 @@ colour_byname(const char *name)
 	}
 	return (-1);
 }
+
+/* Parse colour from an X11 string. */
+int
+colour_parseX11(const char *p)
+{
+	double	 c, m, y, k = 0;
+	u_int	 r, g, b;
+	size_t	 len = strlen(p);
+	int	 colour = -1;
+	char	*copy;
+
+	if ((len == 12 && sscanf(p, "rgb:%02x/%02x/%02x", &r, &g, &b) == 3) ||
+	    (len == 7 && sscanf(p, "#%02x%02x%02x", &r, &g, &b) == 3) ||
+	    sscanf(p, "%d,%d,%d", &r, &g, &b) == 3)
+		colour = colour_join_rgb(r, g, b);
+	else if ((len == 18 &&
+	    sscanf(p, "rgb:%04x/%04x/%04x", &r, &g, &b) == 3) ||
+	    (len == 13 && sscanf(p, "#%04x%04x%04x", &r, &g, &b) == 3))
+		colour = colour_join_rgb(r >> 8, g >> 8, b >> 8);
+	else if ((sscanf(p, "cmyk:%lf/%lf/%lf/%lf", &c, &m, &y, &k) == 4 ||
+	    sscanf(p, "cmy:%lf/%lf/%lf", &c, &m, &y) == 3) &&
+	    c >= 0 && c <= 1 && m >= 0 && m <= 1 &&
+	    y >= 0 && y <= 1 && k >= 0 && k <= 1) {
+		colour = colour_join_rgb(
+		    (1 - c) * (1 - k) * 255,
+		    (1 - m) * (1 - k) * 255,
+		    (1 - y) * (1 - k) * 255);
+	} else {
+		while (len != 0 && *p == ' ') {
+			p++;
+			len--;
+		}
+		while (len != 0 && p[len - 1] == ' ')
+			len--;
+		copy = xstrndup(p, len);
+		colour = colour_byname(copy);
+		free(copy);
+	}
+	log_debug("%s: %s = %s", __func__, p, colour_tostring(colour));
+	return (colour);
+}
+
+/* Initialize palette. */
+void
+colour_palette_init(struct colour_palette *p)
+{
+	p->fg = 8;
+	p->bg = 8;
+	p->palette = NULL;
+	p->default_palette = NULL;
+}
+
+/* Clear palette. */
+void
+colour_palette_clear(struct colour_palette *p)
+{
+	if (p != NULL) {
+		p->fg = 8;
+		p->bg = 8;
+ 		free(p->palette);
+		p->palette = NULL;
+	}
+}
+
+/* Free a palette. */
+void
+colour_palette_free(struct colour_palette *p)
+{
+	if (p != NULL) {
+		free(p->palette);
+		p->palette = NULL;
+		free(p->default_palette);
+		p->default_palette = NULL;
+	}
+}
+
+/* Get a colour from a palette. */
+int
+colour_palette_get(struct colour_palette *p, int c)
+{
+	if (p == NULL)
+		return (-1);
+
+	if (c >= 90 && c <= 97)
+		c = 8 + c - 90;
+	else if (c & COLOUR_FLAG_256)
+		c &= ~COLOUR_FLAG_256;
+	else if (c >= 8)
+		return (-1);
+
+	if (p->palette != NULL && p->palette[c] != -1)
+		return (p->palette[c]);
+	if (p->default_palette != NULL && p->default_palette[c] != -1)
+		return (p->default_palette[c]);
+	return (-1);
+}
+
+/* Set a colour in a palette. */
+int
+colour_palette_set(struct colour_palette *p, int n, int c)
+{
+	u_int	i;
+
+	if (p == NULL || n > 255)
+		return (0);
+
+	if (c == -1 && p->palette == NULL)
+		return (0);
+
+	if (c != -1 && p->palette == NULL) {
+		if (p->palette == NULL)
+			p->palette = xcalloc(256, sizeof *p->palette);
+		for (i = 0; i < 256; i++)
+			p->palette[i] = -1;
+	}
+	p->palette[n] = c;
+	return (1);
+}
+
+/* Build palette defaults from an option. */
+void
+colour_palette_from_option(struct colour_palette *p, struct options *oo)
+{
+	struct options_entry		*o;
+	struct options_array_item	*a;
+	u_int				 i, n;
+	int				 c;
+
+	if (p == NULL)
+		return;
+
+	o = options_get(oo, "pane-colours");
+	if ((a = options_array_first(o)) == NULL) {
+		if (p->default_palette != NULL) {
+			free(p->default_palette);
+			p->default_palette = NULL;
+		}
+		return;
+	}
+	if (p->default_palette == NULL)
+		p->default_palette = xcalloc(256, sizeof *p->default_palette);
+	for (i = 0; i < 256; i++)
+		p->default_palette[i] = -1;
+	while (a != NULL) {
+		n = options_array_item_index(a);
+		if (n < 256) {
+			c = options_array_item_value(a)->number;
+			p->default_palette[n] = c;
+		}
+		a = options_array_next(a);
+	}
+}

compat.h

@@ -38,6 +38,14 @@
 #include <event2/bufferevent_compat.h>
 #else
 #include <event.h>
+#ifndef EVBUFFER_EOL_LF
+/*
+ * This doesn't really work because evbuffer_readline is broken, but gets us to
+ * build with very old (older than 1.4.14) libevent.
+ */
+#define EVBUFFER_EOL_LF
+#define evbuffer_readln(a, b, c) evbuffer_readline(a)
+#endif
 #endif
 
 #ifdef HAVE_MALLOC_TRIM
@@ -289,6 +297,11 @@ void		 explicit_bzero(void *, size_t);
 int		 getdtablecount(void);
 #endif
 
+#ifndef HAVE_GETDTABLESIZE
+/* getdtablesize.c */
+int		 getdtablesize(void);
+#endif
+
 #ifndef HAVE_CLOSEFROM
 /* closefrom.c */
 void		 closefrom(int);
@@ -334,6 +347,23 @@ char		*strndup(const char *, size_t);
 void		*memmem(const void *, size_t, const void *, size_t);
 #endif
 
+#ifndef HAVE_HTONLL
+/* htonll.c */
+#undef htonll
+uint64_t	 htonll(uint64_t);
+#endif
+
+#ifndef HAVE_NTOHLL
+/* ntohll.c */
+#undef ntohll
+uint64_t	 ntohll(uint64_t);
+#endif
+
+#ifndef HAVE_GETPEEREID
+/* getpeereid.c */
+int		getpeereid(int, uid_t *, gid_t *);
+#endif
+
 #ifndef HAVE_DAEMON
 /* daemon.c */
 int	 	 daemon(int, int);
@@ -416,6 +446,13 @@ void		*reallocarray(void *, size_t, size_t);
 void		*recallocarray(void *, size_t, size_t, size_t);
 #endif
 
+#ifdef HAVE_SYSTEMD
+/* systemd.c */
+int		 systemd_activated(void);
+int		 systemd_create_socket(int, char **);
+int		 systemd_move_to_new_cgroup(char **);
+#endif
+
 #ifdef HAVE_UTF8PROC
 /* utf8proc.c */
 int		 utf8proc_wcwidth(wchar_t);
@@ -429,11 +466,11 @@ int		 utf8proc_wctomb(char *, wchar_t);
 #endif
 
 /* getopt.c */
-extern int	BSDopterr;
-extern int	BSDoptind;
-extern int	BSDoptopt;
-extern int	BSDoptreset;
-extern char    *BSDoptarg;
+extern int	 BSDopterr;
+extern int	 BSDoptind;
+extern int	 BSDoptopt;
+extern int	 BSDoptreset;
+extern char	*BSDoptarg;
 int	BSDgetopt(int, char *const *, const char *);
 #define getopt(ac, av, o)  BSDgetopt(ac, av, o)
 #define opterr             BSDopterr

compat/clock_gettime.c

@@ -27,7 +27,7 @@
 #endif
 
 int
-clock_gettime(int clock, struct timespec *ts)
+clock_gettime(__unused int clock, struct timespec *ts)
 {
 	struct timeval	tv;
 

compat/getopt.c

@@ -1,115 +0,0 @@
-/*
- * Copyright (c) 1987, 1993, 1994
- *	The Regents of the University of California.  All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-/* OPENBSD ORIGINAL: lib/libc/stdlib/getopt.c */
-
-#include "compat.h"
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-int	BSDopterr = 1,		/* if error message should be printed */
-	BSDoptind = 1,		/* index into parent argv vector */
-	BSDoptopt,		/* character checked for validity */
-	BSDoptreset;		/* reset getopt */
-char	*BSDoptarg;		/* argument associated with option */
-
-#define	BADCH	(int)'?'
-#define	BADARG	(int)':'
-#define	EMSG	""
-
-/*
- * getopt --
- *	Parse argc/argv argument vector.
- */
-int
-BSDgetopt(int nargc, char *const *nargv, const char *ostr)
-{
-	static const char *place = EMSG;	/* option letter processing */
-	char *oli;				/* option letter list index */
-
-	if (ostr == NULL)
-		return (-1);
-
-	if (BSDoptreset || !*place) {		/* update scanning pointer */
-		BSDoptreset = 0;
-		if (BSDoptind >= nargc || *(place = nargv[BSDoptind]) != '-') {
-			place = EMSG;
-			return (-1);
-		}
-		if (place[1] && *++place == '-') {	/* found "--" */
-			if (place[1])
-				return (BADCH);
-			++BSDoptind;
-			place = EMSG;
-			return (-1);
-		}
-	}					/* option letter okay? */
-	if ((BSDoptopt = (int)*place++) == (int)':' ||
-	    !(oli = strchr(ostr, BSDoptopt))) {
-		/*
-		 * if the user didn't specify '-' as an option,
-		 * assume it means -1.
-		 */
-		if (BSDoptopt == (int)'-')
-			return (-1);
-		if (!*place)
-			++BSDoptind;
-		if (BSDopterr && *ostr != ':')
-			(void)fprintf(stderr,
-			    "%s: unknown option -- %c\n", getprogname(),
-			    BSDoptopt);
-		return (BADCH);
-	}
-	if (*++oli != ':') {			/* don't need argument */
-		BSDoptarg = NULL;
-		if (!*place)
-			++BSDoptind;
-	}
-	else {					/* need an argument */
-		if (*place)			/* no white space */
-			BSDoptarg = (char *)place;
-		else if (nargc <= ++BSDoptind) {	/* no arg */
-			place = EMSG;
-			if (*ostr == ':')
-				return (BADARG);
-			if (BSDopterr)
-				(void)fprintf(stderr,
-				    "%s: option requires an argument -- %c\n",
-				    getprogname(), BSDoptopt);
-			return (BADCH);
-		}
-		else				/* white space */
-			BSDoptarg = nargv[BSDoptind];
-		place = EMSG;
-		++BSDoptind;
-	}
-	return (BSDoptopt);			/* dump back option letter */
-}

compat/getopt_long.c

@@ -0,0 +1,577 @@
+/* This file is obtained from OpenSSH:
+ *   Repository: https://github.com/openssh/openssh-portable
+ *   Commit: b5b405fee7f3e79d44e2d2971a4b6b4cc53f112e
+ *   File: /openbsd-compat/getopt_long.c */
+
+/*
+ * Copyright (c) 2002 Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Sponsored in part by the Defense Advanced Research Projects
+ * Agency (DARPA) and Air Force Research Laboratory, Air Force
+ * Materiel Command, USAF, under agreement number F39502-99-1-0512.
+ */
+/*-
+ * Copyright (c) 2000 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Dieter Baron and Thomas Klausner.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/* OPENBSD ORIGINAL: lib/libc/stdlib/getopt_long.c */
+#include "compat.h"
+
+/* The following macro constants are taken from getopt.h of OpenSSH:
+ *   Repository: https://github.com/openssh/openssh-portable
+ *   Commit: b5b405fee7f3e79d44e2d2971a4b6b4cc53f112e
+ *   File: /openbsd-compat/getopt.h
+ *
+ * ---- BEGIN - Copyright notice and license of getopt.h ----
+ * Copyright (c) 2000 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Dieter Baron and Thomas Klausner.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ * ---- END ----
+ */
+#define no_argument        0
+#define required_argument  1
+#define optional_argument  2
+
+#if !defined(HAVE_GETOPT) || !defined(HAVE_GETOPT_OPTRESET)
+
+#if 0
+#include <err.h>
+#include <getopt.h>
+#endif
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+
+struct option {
+	/* name of long option */
+	const char *name;
+	/*
+	 * one of no_argument, required_argument, and optional_argument:
+	 * whether option takes an argument
+	 */
+	int has_arg;
+	/* if not NULL, set *flag to val when option found */
+	int *flag;
+	/* if flag not NULL, value to set *flag to; else return value */
+	int val;
+};
+
+int	opterr = 1;		/* if error message should be printed */
+int	optind = 1;		/* index into parent argv vector */
+int	optopt = '?';		/* character checked for validity */
+int	optreset;		/* reset getopt */
+char    *optarg;		/* argument associated with option */
+
+#define PRINT_ERROR	((opterr) && (*options != ':'))
+
+#define FLAG_PERMUTE	0x01	/* permute non-options to the end of argv */
+#define FLAG_ALLARGS	0x02	/* treat non-options as args to option "-1" */
+#define FLAG_LONGONLY	0x04	/* operate as getopt_long_only */
+
+/* return values */
+#define	BADCH		(int)'?'
+#define	BADARG		((*options == ':') ? (int)':' : (int)'?')
+#define	INORDER		(int)1
+
+#define	EMSG		(char *)""
+
+static int getopt_internal(int, char * const *, const char *,
+			   const struct option *, int *, int);
+static int parse_long_options(char * const *, const char *,
+			      const struct option *, int *, int);
+static int gcd(int, int);
+static void permute_args(int, int, int, char * const *);
+
+static char *place = EMSG; /* option letter processing */
+
+/* XXX: set optreset to 1 rather than these two */
+static int nonopt_start = -1; /* first non option argument (for permute) */
+static int nonopt_end = -1;   /* first option after non options (for permute) */
+
+/* Error messages */
+static const char recargchar[] = "option requires an argument -- %c";
+static const char recargstring[] = "option requires an argument -- %s";
+static const char ambig[] = "ambiguous option -- %.*s";
+static const char noarg[] = "option doesn't take an argument -- %.*s";
+static const char illoptchar[] = "unknown option -- %c";
+static const char illoptstring[] = "unknown option -- %s";
+
+/*
+ * Compute the greatest common divisor of a and b.
+ */
+static int
+gcd(int a, int b)
+{
+	int c;
+
+	c = a % b;
+	while (c != 0) {
+		a = b;
+		b = c;
+		c = a % b;
+	}
+
+	return (b);
+}
+
+/*
+ * Exchange the block from nonopt_start to nonopt_end with the block
+ * from nonopt_end to opt_end (keeping the same order of arguments
+ * in each block).
+ */
+static void
+permute_args(int panonopt_start, int panonopt_end, int opt_end,
+	char * const *nargv)
+{
+	int cstart, cyclelen, i, j, ncycle, nnonopts, nopts, pos;
+	char *swap;
+
+	/*
+	 * compute lengths of blocks and number and size of cycles
+	 */
+	nnonopts = panonopt_end - panonopt_start;
+	nopts = opt_end - panonopt_end;
+	ncycle = gcd(nnonopts, nopts);
+	cyclelen = (opt_end - panonopt_start) / ncycle;
+
+	for (i = 0; i < ncycle; i++) {
+		cstart = panonopt_end+i;
+		pos = cstart;
+		for (j = 0; j < cyclelen; j++) {
+			if (pos >= panonopt_end)
+				pos -= nnonopts;
+			else
+				pos += nopts;
+			swap = nargv[pos];
+			/* LINTED const cast */
+			((char **) nargv)[pos] = nargv[cstart];
+			/* LINTED const cast */
+			((char **)nargv)[cstart] = swap;
+		}
+	}
+}
+
+/*
+ * parse_long_options --
+ *	Parse long options in argc/argv argument vector.
+ * Returns -1 if short_too is set and the option does not match long_options.
+ */
+static int
+parse_long_options(char * const *nargv, const char *options,
+	const struct option *long_options, int *idx, int short_too)
+{
+	char *current_argv, *has_equal;
+	size_t current_argv_len;
+	int i, match;
+
+	current_argv = place;
+	match = -1;
+
+	optind++;
+
+	if ((has_equal = strchr(current_argv, '=')) != NULL) {
+		/* argument found (--option=arg) */
+		current_argv_len = has_equal - current_argv;
+		has_equal++;
+	} else
+		current_argv_len = strlen(current_argv);
+
+	for (i = 0; long_options[i].name; i++) {
+		/* find matching long option */
+		if (strncmp(current_argv, long_options[i].name,
+		    current_argv_len))
+			continue;
+
+		if (strlen(long_options[i].name) == current_argv_len) {
+			/* exact match */
+			match = i;
+			break;
+		}
+		/*
+		 * If this is a known short option, don't allow
+		 * a partial match of a single character.
+		 */
+		if (short_too && current_argv_len == 1)
+			continue;
+
+		if (match == -1)	/* partial match */
+			match = i;
+		else {
+			/* ambiguous abbreviation */
+			if (PRINT_ERROR)
+				warnx(ambig, (int)current_argv_len,
+				     current_argv);
+			optopt = 0;
+			return (BADCH);
+		}
+	}
+	if (match != -1) {		/* option found */
+		if (long_options[match].has_arg == no_argument
+		    && has_equal) {
+			if (PRINT_ERROR)
+				warnx(noarg, (int)current_argv_len,
+				     current_argv);
+			/*
+			 * XXX: GNU sets optopt to val regardless of flag
+			 */
+			if (long_options[match].flag == NULL)
+				optopt = long_options[match].val;
+			else
+				optopt = 0;
+			return (BADARG);
+		}
+		if (long_options[match].has_arg == required_argument ||
+		    long_options[match].has_arg == optional_argument) {
+			if (has_equal)
+				optarg = has_equal;
+			else if (long_options[match].has_arg ==
+			    required_argument) {
+				/*
+				 * optional argument doesn't use next nargv
+				 */
+				optarg = nargv[optind++];
+			}
+		}
+		if ((long_options[match].has_arg == required_argument)
+		    && (optarg == NULL)) {
+			/*
+			 * Missing argument; leading ':' indicates no error
+			 * should be generated.
+			 */
+			if (PRINT_ERROR)
+				warnx(recargstring,
+				    current_argv);
+			/*
+			 * XXX: GNU sets optopt to val regardless of flag
+			 */
+			if (long_options[match].flag == NULL)
+				optopt = long_options[match].val;
+			else
+				optopt = 0;
+			--optind;
+			return (BADARG);
+		}
+	} else {			/* unknown option */
+		if (short_too) {
+			--optind;
+			return (-1);
+		}
+		if (PRINT_ERROR)
+			warnx(illoptstring, current_argv);
+		optopt = 0;
+		return (BADCH);
+	}
+	if (idx)
+		*idx = match;
+	if (long_options[match].flag) {
+		*long_options[match].flag = long_options[match].val;
+		return (0);
+	} else
+		return (long_options[match].val);
+}
+
+/*
+ * getopt_internal --
+ *	Parse argc/argv argument vector.  Called by user level routines.
+ */
+static int
+getopt_internal(int nargc, char * const *nargv, const char *options,
+	const struct option *long_options, int *idx, int flags)
+{
+	char *oli;				/* option letter list index */
+	int optchar, short_too;
+	static int posixly_correct = -1;
+
+	if (options == NULL)
+		return (-1);
+
+	/*
+	 * XXX Some GNU programs (like cvs) set optind to 0 instead of
+	 * XXX using optreset.  Work around this braindamage.
+	 */
+	if (optind == 0)
+		optind = optreset = 1;
+
+	/*
+	 * Disable GNU extensions if POSIXLY_CORRECT is set or options
+	 * string begins with a '+'.
+	 */
+	if (posixly_correct == -1 || optreset)
+		posixly_correct = (getenv("POSIXLY_CORRECT") != NULL);
+	if (*options == '-')
+		flags |= FLAG_ALLARGS;
+	else if (posixly_correct || *options == '+')
+		flags &= ~FLAG_PERMUTE;
+	if (*options == '+' || *options == '-')
+		options++;
+
+	optarg = NULL;
+	if (optreset)
+		nonopt_start = nonopt_end = -1;
+start:
+	if (optreset || !*place) {		/* update scanning pointer */
+		optreset = 0;
+		if (optind >= nargc) {          /* end of argument vector */
+			place = EMSG;
+			if (nonopt_end != -1) {
+				/* do permutation, if we have to */
+				permute_args(nonopt_start, nonopt_end,
+				    optind, nargv);
+				optind -= nonopt_end - nonopt_start;
+			}
+			else if (nonopt_start != -1) {
+				/*
+				 * If we skipped non-options, set optind
+				 * to the first of them.
+				 */
+				optind = nonopt_start;
+			}
+			nonopt_start = nonopt_end = -1;
+			return (-1);
+		}
+		if (*(place = nargv[optind]) != '-' ||
+		    (place[1] == '\0' && strchr(options, '-') == NULL)) {
+			place = EMSG;		/* found non-option */
+			if (flags & FLAG_ALLARGS) {
+				/*
+				 * GNU extension:
+				 * return non-option as argument to option 1
+				 */
+				optarg = nargv[optind++];
+				return (INORDER);
+			}
+			if (!(flags & FLAG_PERMUTE)) {
+				/*
+				 * If no permutation wanted, stop parsing
+				 * at first non-option.
+				 */
+				return (-1);
+			}
+			/* do permutation */
+			if (nonopt_start == -1)
+				nonopt_start = optind;
+			else if (nonopt_end != -1) {
+				permute_args(nonopt_start, nonopt_end,
+				    optind, nargv);
+				nonopt_start = optind -
+				    (nonopt_end - nonopt_start);
+				nonopt_end = -1;
+			}
+			optind++;
+			/* process next argument */
+			goto start;
+		}
+		if (nonopt_start != -1 && nonopt_end == -1)
+			nonopt_end = optind;
+
+		/*
+		 * If we have "-" do nothing, if "--" we are done.
+		 */
+		if (place[1] != '\0' && *++place == '-' && place[1] == '\0') {
+			optind++;
+			place = EMSG;
+			/*
+			 * We found an option (--), so if we skipped
+			 * non-options, we have to permute.
+			 */
+			if (nonopt_end != -1) {
+				permute_args(nonopt_start, nonopt_end,
+				    optind, nargv);
+				optind -= nonopt_end - nonopt_start;
+			}
+			nonopt_start = nonopt_end = -1;
+			return (-1);
+		}
+	}
+
+	/*
+	 * Check long options if:
+	 *  1) we were passed some
+	 *  2) the arg is not just "-"
+	 *  3) either the arg starts with -- we are getopt_long_only()
+	 */
+	if (long_options != NULL && place != nargv[optind] &&
+	    (*place == '-' || (flags & FLAG_LONGONLY))) {
+		short_too = 0;
+		if (*place == '-')
+			place++;		/* --foo long option */
+		else if (*place != ':' && strchr(options, *place) != NULL)
+			short_too = 1;		/* could be short option too */
+
+		optchar = parse_long_options(nargv, options, long_options,
+		    idx, short_too);
+		if (optchar != -1) {
+			place = EMSG;
+			return (optchar);
+		}
+	}
+
+	if ((optchar = (int)*place++) == (int)':' ||
+	    (optchar == (int)'-' && *place != '\0') ||
+	    (oli = strchr(options, optchar)) == NULL) {
+		/*
+		 * If the user specified "-" and  '-' isn't listed in
+		 * options, return -1 (non-option) as per POSIX.
+		 * Otherwise, it is an unknown option character (or ':').
+		 */
+		if (optchar == (int)'-' && *place == '\0')
+			return (-1);
+		if (!*place)
+			++optind;
+		if (PRINT_ERROR)
+			warnx(illoptchar, optchar);
+		optopt = optchar;
+		return (BADCH);
+	}
+	if (long_options != NULL && optchar == 'W' && oli[1] == ';') {
+		/* -W long-option */
+		if (*place)			/* no space */
+			/* NOTHING */;
+		else if (++optind >= nargc) {	/* no arg */
+			place = EMSG;
+			if (PRINT_ERROR)
+				warnx(recargchar, optchar);
+			optopt = optchar;
+			return (BADARG);
+		} else				/* white space */
+			place = nargv[optind];
+		optchar = parse_long_options(nargv, options, long_options,
+		    idx, 0);
+		place = EMSG;
+		return (optchar);
+	}
+	if (*++oli != ':') {			/* doesn't take argument */
+		if (!*place)
+			++optind;
+	} else {				/* takes (optional) argument */
+		optarg = NULL;
+		if (*place)			/* no white space */
+			optarg = place;
+		else if (oli[1] != ':') {	/* arg not optional */
+			if (++optind >= nargc) {	/* no arg */
+				place = EMSG;
+				if (PRINT_ERROR)
+					warnx(recargchar, optchar);
+				optopt = optchar;
+				return (BADARG);
+			} else
+				optarg = nargv[optind];
+		}
+		place = EMSG;
+		++optind;
+	}
+	/* dump back option letter */
+	return (optchar);
+}
+
+/*
+ * getopt --
+ *	Parse argc/argv argument vector.
+ *
+ * [eventually this will replace the BSD getopt]
+ */
+int
+getopt(int nargc, char * const *nargv, const char *options)
+{
+
+	/*
+	 * We don't pass FLAG_PERMUTE to getopt_internal() since
+	 * the BSD getopt(3) (unlike GNU) has never done this.
+	 *
+	 * Furthermore, since many privileged programs call getopt()
+	 * before dropping privileges it makes sense to keep things
+	 * as simple (and bug-free) as possible.
+	 */
+	return (getopt_internal(nargc, nargv, options, NULL, NULL, 0));
+}
+
+#if 0
+/*
+ * getopt_long --
+ *	Parse argc/argv argument vector.
+ */
+int
+getopt_long(int nargc, char * const *nargv, const char *options,
+    const struct option *long_options, int *idx)
+{
+
+	return (getopt_internal(nargc, nargv, options, long_options, idx,
+	    FLAG_PERMUTE));
+}
+
+/*
+ * getopt_long_only --
+ *	Parse argc/argv argument vector.
+ */
+int
+getopt_long_only(int nargc, char * const *nargv, const char *options,
+    const struct option *long_options, int *idx)
+{
+
+	return (getopt_internal(nargc, nargv, options, long_options, idx,
+	    FLAG_PERMUTE|FLAG_LONGONLY));
+}
+#endif
+
+#endif /* !defined(HAVE_GETOPT) || !defined(HAVE_OPTRESET) */

compat/getpeereid.c

@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2022 Nicholas Marriott <nicholas.marriott@gmail.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
+ * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <stdio.h>
+#include <unistd.h>
+
+#ifdef HAVE_UCRED_H
+#include <ucred.h>
+#endif
+
+#include "compat.h"
+
+int
+getpeereid(int s, uid_t *uid, gid_t *gid)
+{
+#ifdef HAVE_SO_PEERCRED
+	struct ucred	uc;
+	int		len = sizeof uc;
+
+	if (getsockopt(s, SOL_SOCKET, SO_PEERCRED, &uc, &len) == -1)
+		return (-1);
+	*uid = uc.uid;
+	*gid = uc.gid;
+	return (0);
+#elif defined(HAVE_GETPEERUCRED)
+        ucred_t *ucred = NULL;
+
+        if (getpeerucred(s, &ucred) == -1)
+                return (-1);
+        if ((*uid = ucred_geteuid(ucred)) == -1)
+                return (-1);
+        if ((*gid = ucred_getrgid(ucred)) == -1)
+                return (-1);
+        ucred_free(ucred);
+        return (0);
+#else
+	*uid = geteuid();
+	*gid = getegid();
+	return (0);
+#endif
+}

compat/htonll.c

@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2024 Nicholas Marriott <nicholas.marriott@gmail.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
+ * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <arpa/inet.h>
+#include <sys/types.h>
+
+#include "compat.h"
+
+uint64_t
+htonll(uint64_t v)
+{
+    uint32_t b;
+    uint32_t t;
+
+    b = htonl (v & 0xffffffff);
+    t = htonl (v >> 32);
+    return ((uint64_t)b << 32 | t);
+}

compat/imsg.c

@@ -1,6 +1,7 @@
-/*	$OpenBSD: imsg.c,v 1.16 2017/12/14 09:27:44 kettenis Exp $	*/
+/*	$OpenBSD: imsg.c,v 1.37 2024/11/26 13:57:31 claudio Exp $	*/
 
 /*
+ * Copyright (c) 2023 Claudio Jeker <claudio@openbsd.org>
  * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
  *
  * Permission to use, copy, modify, and distribute this software for any
@@ -21,6 +22,7 @@
 #include <sys/uio.h>
 
 #include <errno.h>
+#include <stddef.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
@@ -28,203 +30,288 @@
 #include "compat.h"
 #include "imsg.h"
 
-int	 imsg_fd_overhead = 0;
+#define IMSG_ALLOW_FDPASS	0x01
+#define IMSG_FD_MARK		0x80000000U
 
-static int	 imsg_get_fd(struct imsgbuf *);
+static struct ibuf	*imsg_parse_hdr(struct ibuf *, void *, int *);
+
+int
+imsgbuf_init(struct imsgbuf *imsgbuf, int fd)
+{
+	imsgbuf->w = msgbuf_new_reader(IMSG_HEADER_SIZE, imsg_parse_hdr,
+	    imsgbuf);
+	if (imsgbuf->w == NULL)
+		return (-1);
+	imsgbuf->pid = getpid();
+	imsgbuf->maxsize = MAX_IMSGSIZE;
+	imsgbuf->fd = fd;
+	imsgbuf->flags = 0;
+	return (0);
+}
 
 void
-imsg_init(struct imsgbuf *ibuf, int fd)
+imsgbuf_allow_fdpass(struct imsgbuf *imsgbuf)
 {
-	msgbuf_init(&ibuf->w);
-	memset(&ibuf->r, 0, sizeof(ibuf->r));
-	ibuf->fd = fd;
-	ibuf->w.fd = fd;
-	ibuf->pid = getpid();
-	TAILQ_INIT(&ibuf->fds);
-}
-
-ssize_t
-imsg_read(struct imsgbuf *ibuf)
-{
-	struct msghdr		 msg;
-	struct cmsghdr		*cmsg;
-	union {
-		struct cmsghdr hdr;
-		char	buf[CMSG_SPACE(sizeof(int) * 1)];
-	} cmsgbuf;
-	struct iovec		 iov;
-	ssize_t			 n = -1;
-	int			 fd;
-	struct imsg_fd		*ifd;
-
-	memset(&msg, 0, sizeof(msg));
-	memset(&cmsgbuf, 0, sizeof(cmsgbuf));
-
-	iov.iov_base = ibuf->r.buf + ibuf->r.wpos;
-	iov.iov_len = sizeof(ibuf->r.buf) - ibuf->r.wpos;
-	msg.msg_iov = &iov;
-	msg.msg_iovlen = 1;
-	msg.msg_control = &cmsgbuf.buf;
-	msg.msg_controllen = sizeof(cmsgbuf.buf);
-
-	if ((ifd = calloc(1, sizeof(struct imsg_fd))) == NULL)
-		return (-1);
-
-again:
-	if (getdtablecount() + imsg_fd_overhead +
-	    (int)((CMSG_SPACE(sizeof(int))-CMSG_SPACE(0))/sizeof(int))
-	    >= getdtablesize()) {
-		errno = EAGAIN;
-		free(ifd);
-		return (-1);
-	}
-
-	if ((n = recvmsg(ibuf->fd, &msg, 0)) == -1) {
-		if (errno == EINTR)
-			goto again;
-		goto fail;
-	}
-
-	ibuf->r.wpos += n;
-
-	for (cmsg = CMSG_FIRSTHDR(&msg); cmsg != NULL;
-	    cmsg = CMSG_NXTHDR(&msg, cmsg)) {
-		if (cmsg->cmsg_level == SOL_SOCKET &&
-		    cmsg->cmsg_type == SCM_RIGHTS) {
-			int i;
-			int j;
-
-			/*
-			 * We only accept one file descriptor.  Due to C
-			 * padding rules, our control buffer might contain
-			 * more than one fd, and we must close them.
-			 */
-			j = ((char *)cmsg + cmsg->cmsg_len -
-			    (char *)CMSG_DATA(cmsg)) / sizeof(int);
-			for (i = 0; i < j; i++) {
-				fd = ((int *)CMSG_DATA(cmsg))[i];
-				if (ifd != NULL) {
-					ifd->fd = fd;
-					TAILQ_INSERT_TAIL(&ibuf->fds, ifd,
-					    entry);
-					ifd = NULL;
-				} else
-					close(fd);
-			}
-		}
-		/* we do not handle other ctl data level */
-	}
-
-fail:
-	free(ifd);
-	return (n);
-}
-
-ssize_t
-imsg_get(struct imsgbuf *ibuf, struct imsg *imsg)
-{
-	size_t			 av, left, datalen;
-
-	av = ibuf->r.wpos;
-
-	if (IMSG_HEADER_SIZE > av)
-		return (0);
-
-	memcpy(&imsg->hdr, ibuf->r.buf, sizeof(imsg->hdr));
-	if (imsg->hdr.len < IMSG_HEADER_SIZE ||
-	    imsg->hdr.len > MAX_IMSGSIZE) {
-		errno = ERANGE;
-		return (-1);
-	}
-	if (imsg->hdr.len > av)
-		return (0);
-	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
-	ibuf->r.rptr = ibuf->r.buf + IMSG_HEADER_SIZE;
-	if (datalen == 0)
-		imsg->data = NULL;
-	else if ((imsg->data = malloc(datalen)) == NULL)
-		return (-1);
-
-	if (imsg->hdr.flags & IMSGF_HASFD)
-		imsg->fd = imsg_get_fd(ibuf);
-	else
-		imsg->fd = -1;
-
-	memcpy(imsg->data, ibuf->r.rptr, datalen);
-
-	if (imsg->hdr.len < av) {
-		left = av - imsg->hdr.len;
-		memmove(&ibuf->r.buf, ibuf->r.buf + imsg->hdr.len, left);
-		ibuf->r.wpos = left;
-	} else
-		ibuf->r.wpos = 0;
-
-	return (datalen + IMSG_HEADER_SIZE);
+	imsgbuf->flags |= IMSG_ALLOW_FDPASS;
 }
 
 int
-imsg_compose(struct imsgbuf *ibuf, uint32_t type, uint32_t peerid, pid_t pid,
-    int fd, const void *data, uint16_t datalen)
+imsgbuf_set_maxsize(struct imsgbuf *imsgbuf, uint32_t maxsize)
+{
+	if (maxsize < IMSG_HEADER_SIZE || maxsize & IMSG_FD_MARK) {
+		errno = EINVAL;
+		return (-1);
+	}
+	imsgbuf->maxsize = maxsize;
+	return (0);
+}
+
+int
+imsgbuf_read(struct imsgbuf *imsgbuf)
+{
+	if (imsgbuf->flags & IMSG_ALLOW_FDPASS)
+		return msgbuf_read(imsgbuf->fd, imsgbuf->w);
+	else
+		return ibuf_read(imsgbuf->fd, imsgbuf->w);
+}
+
+int
+imsgbuf_write(struct imsgbuf *imsgbuf)
+{
+	if (imsgbuf->flags & IMSG_ALLOW_FDPASS)
+		return msgbuf_write(imsgbuf->fd, imsgbuf->w);
+	else
+		return ibuf_write(imsgbuf->fd, imsgbuf->w);
+}
+
+int
+imsgbuf_flush(struct imsgbuf *imsgbuf)
+{
+	while (imsgbuf_queuelen(imsgbuf) > 0) {
+		if (imsgbuf_write(imsgbuf) == -1)
+			return (-1);
+	}
+	return (0);
+}
+
+void
+imsgbuf_clear(struct imsgbuf *imsgbuf)
+{
+	msgbuf_free(imsgbuf->w);
+	imsgbuf->w = NULL;
+}
+
+uint32_t
+imsgbuf_queuelen(struct imsgbuf *imsgbuf)
+{
+	return msgbuf_queuelen(imsgbuf->w);
+}
+
+ssize_t
+imsg_get(struct imsgbuf *imsgbuf, struct imsg *imsg)
+{
+	struct imsg		 m;
+	struct ibuf		*buf;
+
+	if ((buf = msgbuf_get(imsgbuf->w)) == NULL)
+		return (0);
+
+	if (ibuf_get(buf, &m.hdr, sizeof(m.hdr)) == -1)
+		return (-1);
+
+	if (ibuf_size(buf))
+		m.data = ibuf_data(buf);
+	else
+		m.data = NULL;
+	m.buf = buf;
+	m.hdr.len &= ~IMSG_FD_MARK;
+
+	*imsg = m;
+	return (ibuf_size(buf) + IMSG_HEADER_SIZE);
+}
+
+int
+imsg_get_ibuf(struct imsg *imsg, struct ibuf *ibuf)
+{
+	if (ibuf_size(imsg->buf) == 0) {
+		errno = EBADMSG;
+		return (-1);
+	}
+	return ibuf_get_ibuf(imsg->buf, ibuf_size(imsg->buf), ibuf);
+}
+
+int
+imsg_get_data(struct imsg *imsg, void *data, size_t len)
+{
+	if (len == 0) {
+		errno = EINVAL;
+		return (-1);
+	}
+	if (ibuf_size(imsg->buf) != len) {
+		errno = EBADMSG;
+		return (-1);
+	}
+	return ibuf_get(imsg->buf, data, len);
+}
+
+int
+imsg_get_fd(struct imsg *imsg)
+{
+	return ibuf_fd_get(imsg->buf);
+}
+
+uint32_t
+imsg_get_id(struct imsg *imsg)
+{
+	return (imsg->hdr.peerid);
+}
+
+size_t
+imsg_get_len(struct imsg *imsg)
+{
+	return ibuf_size(imsg->buf);
+}
+
+pid_t
+imsg_get_pid(struct imsg *imsg)
+{
+	return (imsg->hdr.pid);
+}
+
+uint32_t
+imsg_get_type(struct imsg *imsg)
+{
+	return (imsg->hdr.type);
+}
+
+int
+imsg_compose(struct imsgbuf *imsgbuf, uint32_t type, uint32_t id, pid_t pid,
+    int fd, const void *data, size_t datalen)
 {
 	struct ibuf	*wbuf;
 
-	if ((wbuf = imsg_create(ibuf, type, peerid, pid, datalen)) == NULL)
+	if ((wbuf = imsg_create(imsgbuf, type, id, pid, datalen)) == NULL)
 		return (-1);
 
 	if (imsg_add(wbuf, data, datalen) == -1)
 		return (-1);
 
-	wbuf->fd = fd;
-
-	imsg_close(ibuf, wbuf);
+	ibuf_fd_set(wbuf, fd);
+	imsg_close(imsgbuf, wbuf);
 
 	return (1);
 }
 
 int
-imsg_composev(struct imsgbuf *ibuf, uint32_t type, uint32_t peerid, pid_t pid,
+imsg_composev(struct imsgbuf *imsgbuf, uint32_t type, uint32_t id, pid_t pid,
     int fd, const struct iovec *iov, int iovcnt)
 {
 	struct ibuf	*wbuf;
-	int		 i, datalen = 0;
+	int		 i;
+	size_t		 datalen = 0;
 
 	for (i = 0; i < iovcnt; i++)
 		datalen += iov[i].iov_len;
 
-	if ((wbuf = imsg_create(ibuf, type, peerid, pid, datalen)) == NULL)
+	if ((wbuf = imsg_create(imsgbuf, type, id, pid, datalen)) == NULL)
 		return (-1);
 
 	for (i = 0; i < iovcnt; i++)
 		if (imsg_add(wbuf, iov[i].iov_base, iov[i].iov_len) == -1)
 			return (-1);
 
-	wbuf->fd = fd;
-
-	imsg_close(ibuf, wbuf);
+	ibuf_fd_set(wbuf, fd);
+	imsg_close(imsgbuf, wbuf);
 
 	return (1);
 }
 
-/* ARGSUSED */
+/*
+ * Enqueue imsg with payload from ibuf buf. fd passing is not possible 
+ * with this function.
+ */
+int
+imsg_compose_ibuf(struct imsgbuf *imsgbuf, uint32_t type, uint32_t id,
+    pid_t pid, struct ibuf *buf)
+{
+	struct ibuf	*hdrbuf = NULL;
+	struct imsg_hdr	 hdr;
+	int save_errno;
+
+	if (ibuf_size(buf) + IMSG_HEADER_SIZE > imsgbuf->maxsize) {
+		errno = ERANGE;
+		goto fail;
+	}
+
+	hdr.type = type;
+	hdr.len = ibuf_size(buf) + IMSG_HEADER_SIZE;
+	hdr.peerid = id;
+	if ((hdr.pid = pid) == 0)
+		hdr.pid = imsgbuf->pid;
+
+	if ((hdrbuf = ibuf_open(IMSG_HEADER_SIZE)) == NULL)
+		goto fail;
+	if (imsg_add(hdrbuf, &hdr, sizeof(hdr)) == -1)
+		goto fail;
+
+	ibuf_close(imsgbuf->w, hdrbuf);
+	ibuf_close(imsgbuf->w, buf);
+	return (1);
+
+ fail:
+	save_errno = errno;
+	ibuf_free(buf);
+	ibuf_free(hdrbuf);
+	errno = save_errno;
+	return (-1);
+}
+
+/*
+ * Forward imsg to another channel. Any attached fd is closed.
+ */
+int
+imsg_forward(struct imsgbuf *imsgbuf, struct imsg *msg)
+{
+	struct ibuf	*wbuf;
+	size_t		 len;
+
+	ibuf_rewind(msg->buf);
+	ibuf_skip(msg->buf, sizeof(msg->hdr));
+	len = ibuf_size(msg->buf);
+
+	if ((wbuf = imsg_create(imsgbuf, msg->hdr.type, msg->hdr.peerid,
+	    msg->hdr.pid, len)) == NULL)
+		return (-1);
+
+	if (len != 0) {
+		if (ibuf_add_ibuf(wbuf, msg->buf) == -1) {
+			ibuf_free(wbuf);
+			return (-1);
+		}
+	}
+
+	imsg_close(imsgbuf, wbuf);
+	return (1);
+}
+
 struct ibuf *
-imsg_create(struct imsgbuf *ibuf, uint32_t type, uint32_t peerid, pid_t pid,
-    uint16_t datalen)
+imsg_create(struct imsgbuf *imsgbuf, uint32_t type, uint32_t id, pid_t pid,
+    size_t datalen)
 {
 	struct ibuf	*wbuf;
 	struct imsg_hdr	 hdr;
 
 	datalen += IMSG_HEADER_SIZE;
-	if (datalen > MAX_IMSGSIZE) {
+	if (datalen > imsgbuf->maxsize) {
 		errno = ERANGE;
 		return (NULL);
 	}
 
 	hdr.type = type;
-	hdr.flags = 0;
-	hdr.peerid = peerid;
+	hdr.peerid = id;
 	if ((hdr.pid = pid) == 0)
-		hdr.pid = ibuf->pid;
-	if ((wbuf = ibuf_dynamic(datalen, MAX_IMSGSIZE)) == NULL) {
+		hdr.pid = imsgbuf->pid;
+	if ((wbuf = ibuf_dynamic(datalen, imsgbuf->maxsize)) == NULL) {
 		return (NULL);
 	}
 	if (imsg_add(wbuf, &hdr, sizeof(hdr)) == -1)
@@ -234,7 +321,7 @@ imsg_create(struct imsgbuf *ibuf, uint32_t type, uint32_t peerid, pid_t pid,
 }
 
 int
-imsg_add(struct ibuf *msg, const void *data, uint16_t datalen)
+imsg_add(struct ibuf *msg, const void *data, size_t datalen)
 {
 	if (datalen)
 		if (ibuf_add(msg, data, datalen) == -1) {
@@ -245,58 +332,47 @@ imsg_add(struct ibuf *msg, const void *data, uint16_t datalen)
 }
 
 void
-imsg_close(struct imsgbuf *ibuf, struct ibuf *msg)
+imsg_close(struct imsgbuf *imsgbuf, struct ibuf *msg)
 {
 	struct imsg_hdr	*hdr;
+	uint32_t len;
 
-	hdr = (struct imsg_hdr *)msg->buf;
-
-	hdr->flags &= ~IMSGF_HASFD;
-	if (msg->fd != -1)
-		hdr->flags |= IMSGF_HASFD;
-
-	hdr->len = (uint16_t)msg->wpos;
-
-	ibuf_close(&ibuf->w, msg);
+	len = ibuf_size(msg);
+	if (ibuf_fd_avail(msg))
+		len |= IMSG_FD_MARK;
+	(void)ibuf_set_h32(msg, offsetof(struct imsg_hdr, len), len);
+	ibuf_close(imsgbuf->w, msg);
 }
 
 void
 imsg_free(struct imsg *imsg)
 {
-	freezero(imsg->data, imsg->hdr.len - IMSG_HEADER_SIZE);
+	ibuf_free(imsg->buf);
 }
 
-static int
-imsg_get_fd(struct imsgbuf *ibuf)
+static struct ibuf *
+imsg_parse_hdr(struct ibuf *buf, void *arg, int *fd)
 {
-	int		 fd;
-	struct imsg_fd	*ifd;
+	struct imsgbuf *imsgbuf = arg;
+	struct imsg_hdr hdr;
+	struct ibuf *b;
+	uint32_t len;
 
-	if ((ifd = TAILQ_FIRST(&ibuf->fds)) == NULL)
-		return (-1);
+	if (ibuf_get(buf, &hdr, sizeof(hdr)) == -1)
+		return (NULL);
 
-	fd = ifd->fd;
-	TAILQ_REMOVE(&ibuf->fds, ifd, entry);
-	free(ifd);
+	len = hdr.len & ~IMSG_FD_MARK;
 
-	return (fd);
-}
-
-int
-imsg_flush(struct imsgbuf *ibuf)
-{
-	while (ibuf->w.queued)
-		if (msgbuf_write(&ibuf->w) <= 0)
-			return (-1);
-	return (0);
-}
-
-void
-imsg_clear(struct imsgbuf *ibuf)
-{
-	int	fd;
-
-	msgbuf_clear(&ibuf->w);
-	while ((fd = imsg_get_fd(ibuf)) != -1)
-		close(fd);
+	if (len < IMSG_HEADER_SIZE || len > imsgbuf->maxsize) {
+		errno = ERANGE;
+		return (NULL);
+	}
+	if ((b = ibuf_open(len)) == NULL)
+		return (NULL);
+	if (hdr.len & IMSG_FD_MARK) {
+		ibuf_fd_set(b, *fd);
+		*fd = -1;
+	}
+
+	return b;
 }

compat/imsg.h

@@ -1,6 +1,7 @@
-/*	$OpenBSD: imsg.h,v 1.5 2019/01/20 02:50:03 bcook Exp $	*/
+/*	$OpenBSD: imsg.h,v 1.19 2024/11/26 13:57:31 claudio Exp $	*/
 
 /*
+ * Copyright (c) 2023 Claudio Jeker <claudio@openbsd.org>
  * Copyright (c) 2006, 2007 Pierre-Yves Ritschard <pyr@openbsd.org>
  * Copyright (c) 2006, 2007, 2008 Reyk Floeter <reyk@openbsd.org>
  * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
@@ -21,7 +22,7 @@
 #ifndef _IMSG_H_
 #define _IMSG_H_
 
-#include <stdint.h>
+#include <sys/types.h>
 
 #define IBUF_READ_SIZE		65535
 #define IMSG_HEADER_SIZE	sizeof(struct imsg_hdr)
@@ -37,77 +38,116 @@ struct ibuf {
 	int			 fd;
 };
 
-struct msgbuf {
-	TAILQ_HEAD(, ibuf)	 bufs;
-	uint32_t		 queued;
-	int			 fd;
-};
-
-struct ibuf_read {
-	unsigned char		 buf[IBUF_READ_SIZE];
-	unsigned char		*rptr;
-	size_t			 wpos;
-};
-
-struct imsg_fd {
-	TAILQ_ENTRY(imsg_fd)	entry;
-	int			fd;
-};
+struct msgbuf;
 
 struct imsgbuf {
-	TAILQ_HEAD(, imsg_fd)	 fds;
-	struct ibuf_read	 r;
-	struct msgbuf		 w;
-	int			 fd;
+	struct msgbuf		*w;
 	pid_t			 pid;
+	uint32_t		 maxsize;
+	int			 fd;
+	int			 flags;
 };
 
-#define IMSGF_HASFD	1
-
 struct imsg_hdr {
 	uint32_t	 type;
-	uint16_t	 len;
-	uint16_t	 flags;
+	uint32_t	 len;
 	uint32_t	 peerid;
 	uint32_t	 pid;
 };
 
 struct imsg {
 	struct imsg_hdr	 hdr;
-	int		 fd;
 	void		*data;
+	struct ibuf	*buf;
 };
 
+struct iovec;
 
-/* buffer.c */
+/* imsg-buffer.c */
 struct ibuf	*ibuf_open(size_t);
 struct ibuf	*ibuf_dynamic(size_t, size_t);
 int		 ibuf_add(struct ibuf *, const void *, size_t);
+int		 ibuf_add_ibuf(struct ibuf *, const struct ibuf *);
+int		 ibuf_add_zero(struct ibuf *, size_t);
+int		 ibuf_add_n8(struct ibuf *, uint64_t);
+int		 ibuf_add_n16(struct ibuf *, uint64_t);
+int		 ibuf_add_n32(struct ibuf *, uint64_t);
+int		 ibuf_add_n64(struct ibuf *, uint64_t);
+int		 ibuf_add_h16(struct ibuf *, uint64_t);
+int		 ibuf_add_h32(struct ibuf *, uint64_t);
+int		 ibuf_add_h64(struct ibuf *, uint64_t);
 void		*ibuf_reserve(struct ibuf *, size_t);
 void		*ibuf_seek(struct ibuf *, size_t, size_t);
-size_t		 ibuf_size(struct ibuf *);
-size_t		 ibuf_left(struct ibuf *);
+int		 ibuf_set(struct ibuf *, size_t, const void *, size_t);
+int		 ibuf_set_n8(struct ibuf *, size_t, uint64_t);
+int		 ibuf_set_n16(struct ibuf *, size_t, uint64_t);
+int		 ibuf_set_n32(struct ibuf *, size_t, uint64_t);
+int		 ibuf_set_n64(struct ibuf *, size_t, uint64_t);
+int		 ibuf_set_h16(struct ibuf *, size_t, uint64_t);
+int		 ibuf_set_h32(struct ibuf *, size_t, uint64_t);
+int		 ibuf_set_h64(struct ibuf *, size_t, uint64_t);
+void		*ibuf_data(const struct ibuf *);
+size_t		 ibuf_size(const struct ibuf *);
+size_t		 ibuf_left(const struct ibuf *);
+int		 ibuf_truncate(struct ibuf *, size_t);
+void		 ibuf_rewind(struct ibuf *);
 void		 ibuf_close(struct msgbuf *, struct ibuf *);
-int		 ibuf_write(struct msgbuf *);
+void		 ibuf_from_buffer(struct ibuf *, void *, size_t);
+void		 ibuf_from_ibuf(struct ibuf *, const struct ibuf *);
+int		 ibuf_get(struct ibuf *, void *, size_t);
+int		 ibuf_get_ibuf(struct ibuf *, size_t, struct ibuf *);
+int		 ibuf_get_n8(struct ibuf *, uint8_t *);
+int		 ibuf_get_n16(struct ibuf *, uint16_t *);
+int		 ibuf_get_n32(struct ibuf *, uint32_t *);
+int		 ibuf_get_n64(struct ibuf *, uint64_t *);
+int		 ibuf_get_h16(struct ibuf *, uint16_t *);
+int		 ibuf_get_h32(struct ibuf *, uint32_t *);
+int		 ibuf_get_h64(struct ibuf *, uint64_t *);
+char		*ibuf_get_string(struct ibuf *, size_t);
+int		 ibuf_skip(struct ibuf *, size_t);
 void		 ibuf_free(struct ibuf *);
-void		 msgbuf_init(struct msgbuf *);
+int		 ibuf_fd_avail(struct ibuf *);
+int		 ibuf_fd_get(struct ibuf *);
+void		 ibuf_fd_set(struct ibuf *, int);
+struct msgbuf	*msgbuf_new(void);
+struct msgbuf	*msgbuf_new_reader(size_t,
+		    struct ibuf *(*)(struct ibuf *, void *, int *), void *);
+void		 msgbuf_free(struct msgbuf *);
 void		 msgbuf_clear(struct msgbuf *);
-int		 msgbuf_write(struct msgbuf *);
-void		 msgbuf_drain(struct msgbuf *, size_t);
+uint32_t	 msgbuf_queuelen(struct msgbuf *);
+int		 ibuf_write(int, struct msgbuf *);
+int		 msgbuf_write(int, struct msgbuf *);
+int		 ibuf_read(int, struct msgbuf *);
+int		 msgbuf_read(int, struct msgbuf *);
+struct ibuf	*msgbuf_get(struct msgbuf *);
 
 /* imsg.c */
-void	 imsg_init(struct imsgbuf *, int);
-ssize_t	 imsg_read(struct imsgbuf *);
+int	 imsgbuf_init(struct imsgbuf *, int);
+void	 imsgbuf_allow_fdpass(struct imsgbuf *imsgbuf);
+int	 imsgbuf_set_maxsize(struct imsgbuf *, uint32_t);
+int	 imsgbuf_read(struct imsgbuf *);
+int	 imsgbuf_write(struct imsgbuf *);
+int	 imsgbuf_flush(struct imsgbuf *);
+void	 imsgbuf_clear(struct imsgbuf *);
+uint32_t imsgbuf_queuelen(struct imsgbuf *);
 ssize_t	 imsg_get(struct imsgbuf *, struct imsg *);
+int	 imsg_get_ibuf(struct imsg *, struct ibuf *);
+int	 imsg_get_data(struct imsg *, void *, size_t);
+int	 imsg_get_fd(struct imsg *);
+uint32_t imsg_get_id(struct imsg *);
+size_t	 imsg_get_len(struct imsg *);
+pid_t	 imsg_get_pid(struct imsg *);
+uint32_t imsg_get_type(struct imsg *);
+int	 imsg_forward(struct imsgbuf *, struct imsg *);
 int	 imsg_compose(struct imsgbuf *, uint32_t, uint32_t, pid_t, int,
-	    const void *, uint16_t);
+	    const void *, size_t);
 int	 imsg_composev(struct imsgbuf *, uint32_t, uint32_t,  pid_t, int,
 	    const struct iovec *, int);
-struct ibuf *imsg_create(struct imsgbuf *, uint32_t, uint32_t, pid_t, uint16_t);
-int	 imsg_add(struct ibuf *, const void *, uint16_t);
+int	 imsg_compose_ibuf(struct imsgbuf *, uint32_t, uint32_t, pid_t,
+	    struct ibuf *);
+struct ibuf *imsg_create(struct imsgbuf *, uint32_t, uint32_t, pid_t, size_t);
+int	 imsg_add(struct ibuf *, const void *, size_t);
 void	 imsg_close(struct imsgbuf *, struct ibuf *);
 void	 imsg_free(struct imsg *);
-int	 imsg_flush(struct imsgbuf *);
-void	 imsg_clear(struct imsgbuf *);
 
 #endif

compat/ntohll.c

@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2024 Nicholas Marriott <nicholas.marriott@gmail.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
+ * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <arpa/inet.h>
+#include <sys/types.h>
+
+#include "compat.h"
+
+uint64_t
+ntohll(uint64_t v)
+{
+    uint32_t b;
+    uint32_t t;
+
+    b = ntohl (v & 0xffffffff);
+    t = ntohl (v >> 32);
+    return ((uint64_t)b << 32 | t);
+}

compat/queue.h

@@ -32,8 +32,8 @@
  *	@(#)queue.h	8.5 (Berkeley) 8/20/94
  */
 
-#ifndef	_SYS_QUEUE_H_
-#define	_SYS_QUEUE_H_
+#ifndef	_COMPAT_QUEUE_H_
+#define	_COMPAT_QUEUE_H_
 
 /*
  * This file defines five types of data structures: singly-linked lists,
@@ -530,4 +530,4 @@ struct {								\
 	}								\
 } while (0)
 
-#endif	/* !_SYS_QUEUE_H_ */
+#endif	/* !_COMPAT_QUEUE_H_ */

compat/setproctitle.c

@@ -17,6 +17,7 @@
 #include <sys/types.h>
 
 #include <stdarg.h>
+#include <stdlib.h>
 #include <string.h>
 
 #include "compat.h"

compat/systemd.c

@@ -0,0 +1,326 @@
+/* $OpenBSD$ */
+
+/*
+ * Copyright (c) 2022 Nicholas Marriott <nicholas.marriott@gmail.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
+ * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/types.h>
+#include <sys/un.h>
+
+#include <systemd/sd-bus.h>
+#include <systemd/sd-daemon.h>
+#include <systemd/sd-login.h>
+#include <systemd/sd-id128.h>
+
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "tmux.h"
+
+#ifndef SD_ID128_UUID_FORMAT_STR
+#define SD_ID128_UUID_FORMAT_STR \
+	"%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x"
+#endif
+
+int
+systemd_activated(void)
+{
+	return (sd_listen_fds(0) >= 1);
+}
+
+int
+systemd_create_socket(int flags, char **cause)
+{
+	int			fds;
+	int			fd;
+	struct sockaddr_un	sa;
+	socklen_t		addrlen = sizeof sa;
+
+	fds = sd_listen_fds(0);
+	if (fds > 1) { /* too many file descriptors */
+		errno = E2BIG;
+		goto fail;
+	}
+
+	if (fds == 1) { /* socket-activated */
+		fd = SD_LISTEN_FDS_START;
+		if (!sd_is_socket_unix(fd, SOCK_STREAM, 1, NULL, 0)) {
+			errno = EPFNOSUPPORT;
+			goto fail;
+		}
+		if (getsockname(fd, (struct sockaddr *)&sa, &addrlen) == -1)
+			goto fail;
+		socket_path = xstrdup(sa.sun_path);
+		return (fd);
+	}
+
+	return (server_create_socket(flags, cause));
+
+fail:
+	if (cause != NULL)
+		xasprintf(cause, "systemd socket error (%s)", strerror(errno));
+	return (-1);
+}
+
+struct systemd_job_watch {
+	const char	*path;
+	int		 done;
+};
+
+static int
+job_removed_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error)
+{
+	struct systemd_job_watch *watch = userdata;
+	const char		 *path = NULL;
+	uint32_t		 id;
+	int			 r;
+
+	/* This handler could be called during the sd_bus_call. */
+	if (watch->path == NULL)
+		return 0;
+
+	r = sd_bus_message_read(m, "uo", &id, &path);
+	if (r < 0)
+		return (r);
+
+	if (strcmp(path, watch->path) == 0)
+		watch->done = 1;
+
+	return (0);
+}
+
+int
+systemd_move_to_new_cgroup(char **cause)
+{
+	sd_bus_error		 error = SD_BUS_ERROR_NULL;
+	sd_bus_message		*m = NULL, *reply = NULL;
+	sd_bus 			*bus = NULL;
+	sd_bus_slot		*slot = NULL;
+	char			*name, *desc, *slice;
+	sd_id128_t		 uuid;
+	int			 r;
+	uint64_t		 elapsed_usec;
+	pid_t			 pid, parent_pid;
+	struct timeval		 start, now;
+	struct systemd_job_watch watch = {};
+
+	gettimeofday(&start, NULL);
+
+	/* Connect to the session bus. */
+	r = sd_bus_default_user(&bus);
+	if (r < 0) {
+		xasprintf(cause, "failed to connect to session bus: %s",
+		    strerror(-r));
+		goto finish;
+	}
+
+	/* Start watching for JobRemoved events */
+	r = sd_bus_match_signal(bus, &slot,
+	    "org.freedesktop.systemd1",
+	    "/org/freedesktop/systemd1",
+	    "org.freedesktop.systemd1.Manager",
+	    "JobRemoved",
+	    job_removed_handler,
+	    &watch);
+	if (r < 0) {
+		xasprintf(cause, "failed to create match signal: %s",
+		    strerror(-r));
+		goto finish;
+	}
+
+	/* Start building the method call. */
+	r = sd_bus_message_new_method_call(bus, &m,
+	    "org.freedesktop.systemd1",
+	    "/org/freedesktop/systemd1",
+	    "org.freedesktop.systemd1.Manager",
+	    "StartTransientUnit");
+	if (r < 0) {
+		xasprintf(cause, "failed to create bus message: %s",
+		    strerror(-r));
+		goto finish;
+	}
+
+	/* Generate a unique name for the new scope, to avoid collisions. */
+	r = sd_id128_randomize(&uuid);
+	if (r < 0) {
+		xasprintf(cause, "failed to generate uuid: %s", strerror(-r));
+		goto finish;
+	}
+	xasprintf(&name, "tmux-spawn-" SD_ID128_UUID_FORMAT_STR ".scope",
+	    SD_ID128_FORMAT_VAL(uuid));
+	r = sd_bus_message_append(m, "s", name);
+	free(name);
+	if (r < 0) {
+		xasprintf(cause, "failed to append to bus message: %s",
+		    strerror(-r));
+		goto finish;
+	}
+
+	/* Mode: fail if there's a queued unit with the same name. */
+	r = sd_bus_message_append(m, "s", "fail");
+	if (r < 0) {
+		xasprintf(cause, "failed to append to bus message: %s",
+		    strerror(-r));
+		goto finish;
+	}
+
+	/* Start properties array. */
+	r = sd_bus_message_open_container(m, 'a', "(sv)");
+	if (r < 0) {
+		xasprintf(cause, "failed to start properties array: %s",
+		    strerror(-r));
+		goto finish;
+	}
+
+	pid = getpid();
+	parent_pid = getppid();
+	xasprintf(&desc, "tmux child pane %ld launched by process %ld",
+	    (long)pid, (long)parent_pid);
+	r = sd_bus_message_append(m, "(sv)", "Description", "s", desc);
+	free(desc);
+	if (r < 0) {
+		xasprintf(cause, "failed to append to properties: %s",
+		    strerror(-r));
+		goto finish;
+	}
+
+	/*
+	 * Make sure that the session shells are terminated with SIGHUP since
+	 * bash and friends tend to ignore SIGTERM.
+	 */
+	r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", 1);
+	if (r < 0) {
+		xasprintf(cause, "failed to append to properties: %s",
+		    strerror(-r));
+		goto finish;
+	}
+
+	/*
+	 * Inherit the slice from the parent process, or default to
+	 * "app-tmux.slice" if that fails.
+	 */
+	r = sd_pid_get_user_slice(parent_pid, &slice);
+	if (r < 0) {
+		slice = xstrdup("app-tmux.slice");
+	}
+	r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
+	free(slice);
+	if (r < 0) {
+		xasprintf(cause, "failed to append to properties: %s",
+		    strerror(-r));
+		goto finish;
+	}
+
+	/* PIDs to add to the scope: length - 1 array of uint32_t. */
+	r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, pid);
+	if (r < 0) {
+		xasprintf(cause, "failed to append to properties: %s",
+		    strerror(-r));
+		goto finish;
+	}
+
+	/* Clean up the scope even if it fails. */
+	r = sd_bus_message_append(m, "(sv)", "CollectMode", "s",
+	    "inactive-or-failed");
+	if (r < 0) {
+		xasprintf(cause, "failed to append to properties: %s",
+		    strerror(-r));
+		goto finish;
+	}
+
+	/* End properties array. */
+	r = sd_bus_message_close_container(m);
+	if (r < 0) {
+		xasprintf(cause, "failed to end properties array: %s",
+		    strerror(-r));
+		goto finish;
+	}
+
+	/* aux is currently unused and should be passed an empty array. */
+	r = sd_bus_message_append(m, "a(sa(sv))", 0);
+	if (r < 0) {
+		xasprintf(cause, "failed to append to bus message: %s",
+		    strerror(-r));
+		goto finish;
+	}
+
+	/* Call the method with a timeout of 1 second = 1e6 us. */
+	r = sd_bus_call(bus, m, 1000000, &error, &reply);
+	if (r < 0) {
+		if (error.message != NULL) {
+			/* We have a specific error message from sd-bus. */
+			xasprintf(cause, "StartTransientUnit call failed: %s",
+			    error.message);
+		} else {
+			xasprintf(cause, "StartTransientUnit call failed: %s",
+			    strerror(-r));
+		}
+		goto finish;
+	}
+
+	/* Get the job (object path) from the reply */
+	r = sd_bus_message_read(reply, "o", &watch.path);
+	if (r < 0) {
+		xasprintf(cause, "failed to parse method reply: %s",
+		    strerror(-r));
+		goto finish;
+	}
+
+	while (!watch.done) {
+		/* Process events including callbacks. */
+		r = sd_bus_process(bus, NULL);
+		if (r < 0) {
+			xasprintf(cause,
+			    "failed waiting for cgroup allocation: %s",
+			    strerror(-r));
+			goto finish;
+		}
+
+		/*
+		 * A positive return means we handled an event and should keep
+		 * processing; zero indicates no events available, so wait.
+		 */
+		if (r > 0)
+			continue;
+
+		gettimeofday(&now, NULL);
+		elapsed_usec = (now.tv_sec - start.tv_sec) * 1000000 +
+		    now.tv_usec - start.tv_usec;
+
+		if (elapsed_usec >= 1000000) {
+			xasprintf(cause,
+			    "timeout waiting for cgroup allocation");
+			goto finish;
+		}
+
+		r = sd_bus_wait(bus, 1000000 - elapsed_usec);
+		if (r < 0) {
+			xasprintf(cause,
+			    "failed waiting for cgroup allocation: %s",
+			    strerror(-r));
+			goto finish;
+		}
+	}
+
+finish:
+	sd_bus_error_free(&error);
+	sd_bus_message_unref(m);
+	sd_bus_message_unref(reply);
+	sd_bus_slot_unref(slot);
+	sd_bus_unref(bus);
+
+	return (r);
+}

configure.ac

@@ -1,6 +1,6 @@
 # configure.ac
 
-AC_INIT([tmux], 3.2)
+AC_INIT([tmux], next-3.6)
 AC_PREREQ([2.60])
 
 AC_CONFIG_AUX_DIR(etc)
@@ -24,27 +24,27 @@ SAVED_LDFLAGS="$LDFLAGS"
 # Is this oss-fuzz build?
 AC_ARG_ENABLE(
 	fuzzing,
-	AC_HELP_STRING(--enable-fuzzing, build fuzzers)
+	AS_HELP_STRING(--enable-fuzzing, build fuzzers)
 )
 AC_ARG_VAR(
 	FUZZING_LIBS,
-	AC_HELP_STRING(libraries to link fuzzing targets with)
+	AS_HELP_STRING(libraries to link fuzzing targets with)
 )
 
 # Set up convenient fuzzing defaults before initializing compiler.
 if test "x$enable_fuzzing" = xyes; then
 	AC_DEFINE(NEED_FUZZING)
-	test "x$CC" == x && CC=clang
-	test "x$FUZZING_LIBS" == x && \
+	test "x$CC" = x && CC=clang
+	test "x$FUZZING_LIBS" = x && \
 		FUZZING_LIBS="-fsanitize=fuzzer"
-	test "x$SAVED_CFLAGS" == x && \
+	test "x$SAVED_CFLAGS" = x && \
 		AM_CFLAGS="-g -fsanitize=fuzzer-no-link,address"
 fi
 
 # Set up the compiler in two different ways and say yes we may want to install.
 AC_PROG_CC
 AM_PROG_CC_C_O
-AC_PROG_CC_C99
+m4_version_prereq(2.70, [AC_PROG_CC], [AC_PROG_CC_C99])
 AC_PROG_CPP
 AC_PROG_EGREP
 AC_PROG_INSTALL
@@ -56,24 +56,45 @@ AC_USE_SYSTEM_EXTENSIONS
 test "$sysconfdir" = '${prefix}/etc' && sysconfdir=/etc
 
 # Is this --enable-debug?
-case "x$VERSION" in xnext*) enable_debug=yes;; esac
 AC_ARG_ENABLE(
 	debug,
-	AC_HELP_STRING(--enable-debug, enable debug build flags),
+	AS_HELP_STRING(--enable-debug, enable debug build flags),
+	,
+	[case "x$VERSION" in xnext*) enable_debug=yes;; esac]
 )
 AM_CONDITIONAL(IS_DEBUG, test "x$enable_debug" = xyes)
 
 # Is this a static build?
 AC_ARG_ENABLE(
 	static,
-	AC_HELP_STRING(--enable-static, create a static build)
+	AS_HELP_STRING(--enable-static, create a static build)
 )
 if test "x$enable_static" = xyes; then
+	case "$host_os" in
+		*darwin*)
+			AC_MSG_ERROR([static linking is not supported on macOS])
+			;;
+	esac
 	test "x$PKG_CONFIG" != x && PKG_CONFIG="$PKG_CONFIG --static"
 	AM_LDFLAGS="-static $AM_LDFLAGS"
 	LDFLAGS="$AM_LDFLAGS $SAVED_LDFLAGS"
 fi
 
+# Allow default TERM to be set.
+AC_ARG_WITH(
+	TERM,
+	AS_HELP_STRING(--with-TERM, set default TERM),
+	[DEFAULT_TERM=$withval],
+	[DEFAULT_TERM=]
+)
+case "x$DEFAULT_TERM" in
+	xscreen*|xtmux*|x)
+	;;
+	*)
+		AC_MSG_ERROR("unsuitable TERM (must be screen* or tmux*)")
+	;;
+esac
+
 # Do we need fuzzers?
 AM_CONDITIONAL(NEED_FUZZING, test "x$enable_fuzzing" = xyes)
 
@@ -108,6 +129,7 @@ AC_CHECK_HEADERS([ \
 	sys/dir.h \
 	sys/ndir.h \
 	sys/tree.h \
+	ucred.h \
 	util.h \
 ])
 
@@ -126,6 +148,7 @@ AC_CHECK_FUNCS([ \
 	flock \
 	prctl \
 	proc_pidinfo \
+	getpeerucred \
 	sysconf
 ])
 
@@ -140,9 +163,12 @@ AC_REPLACE_FUNCS([ \
 	freezero \
 	getdtablecount \
 	getdtablesize \
+	getpeereid \
 	getline \
 	getprogname \
+	htonll \
 	memmem \
+	ntohll \
 	setenv \
 	setproctitle \
 	strcasestr \
@@ -150,10 +176,20 @@ AC_REPLACE_FUNCS([ \
 	strlcpy \
 	strndup \
 	strsep \
-	strtonum \
 ])
 AC_FUNC_STRNLEN
 
+# Check if strtonum works.
+AC_MSG_CHECKING([for working strtonum])
+AC_RUN_IFELSE([AC_LANG_PROGRAM(
+		[#include <stdlib.h>],
+		[return (strtonum("0", 0, 1, NULL) == 0 ? 0 : 1);]
+	)],
+	[AC_DEFINE(HAVE_STRTONUM) AC_MSG_RESULT(yes)],
+	[AC_LIBOBJ(strtonum) AC_MSG_RESULT(no)],
+	[AC_LIBOBJ(strtonum) AC_MSG_RESULT(no)]
+)
+
 # Clang sanitizers wrap reallocarray even if it isn't available on the target
 # system. When compiled it always returns NULL and crashes the program. To
 # detect this we need a more complicated test.
@@ -163,6 +199,7 @@ AC_RUN_IFELSE([AC_LANG_PROGRAM(
 		[return (reallocarray(NULL, 1, 1) == NULL);]
 	)],
 	AC_MSG_RESULT(yes),
+	[AC_LIBOBJ(reallocarray) AC_MSG_RESULT([no])],
 	[AC_LIBOBJ(reallocarray) AC_MSG_RESULT([no])]
 )
 AC_MSG_CHECKING([for working recallocarray])
@@ -171,6 +208,7 @@ AC_RUN_IFELSE([AC_LANG_PROGRAM(
 		[return (recallocarray(NULL, 1, 1, 1) == NULL);]
 	)],
 	AC_MSG_RESULT(yes),
+	[AC_LIBOBJ(recallocarray) AC_MSG_RESULT([no])],
 	[AC_LIBOBJ(recallocarray) AC_MSG_RESULT([no])]
 )
 
@@ -181,7 +219,7 @@ AC_SEARCH_LIBS(clock_gettime, rt)
 # musl does not set optarg to NULL for flags without arguments (although it is
 # not required to, but it is helpful) 3) there are probably other weird
 # implementations.
-AC_LIBOBJ(getopt)
+AC_LIBOBJ(getopt_long)
 
 # Look for libevent. Try libevent_core or libevent with pkg-config first then
 # look for the library.
@@ -232,6 +270,12 @@ if test "x$found_libevent" = xno; then
 	AC_MSG_ERROR("libevent not found")
 fi
 
+# Look for yacc.
+AC_CHECK_PROG(found_yacc, $YACC, yes, no)
+if test "x$found_yacc" = xno; then
+	AC_MSG_ERROR("yacc not found")
+fi
+
 # Look for ncurses or curses. Try pkg-config first then directly for the
 # library.
 PKG_CHECK_MODULES(
@@ -274,7 +318,7 @@ fi
 if test "x$found_ncurses" = xno; then
 	AC_SEARCH_LIBS(
 		setupterm,
-		[tinfo ncurses ncursesw],
+		[tinfo terminfo ncurses ncursesw],
 		found_ncurses=yes,
 		found_ncurses=no
 	)
@@ -287,6 +331,7 @@ if test "x$found_ncurses" = xno; then
 	fi
 fi
 if test "x$found_ncurses" = xyes; then
+	CPPFLAGS="$CPPFLAGS -DHAVE_NCURSES_H"
 	AC_DEFINE(HAVE_NCURSES_H)
 else
 	AC_CHECK_LIB(
@@ -302,16 +347,21 @@ else
 	)
 	if test "x$found_curses" = xyes; then
 		LIBS="$LIBS -lcurses"
+		CPPFLAGS="$CPPFLAGS -DHAVE_CURSES_H"
 		AC_DEFINE(HAVE_CURSES_H)
 	else
 		AC_MSG_ERROR("curses not found")
 	fi
 fi
+AC_CHECK_FUNCS([ \
+	tiparm \
+	tiparm_s \
+])
 
 # Look for utempter.
 AC_ARG_ENABLE(
 	utempter,
-	AC_HELP_STRING(--enable-utempter, use utempter if it is installed)
+	AS_HELP_STRING(--enable-utempter, use utempter if it is installed)
 )
 if test "x$enable_utempter" = xyes; then
 	AC_CHECK_HEADER(utempter.h, enable_utempter=yes, enable_utempter=no)
@@ -333,9 +383,18 @@ fi
 # Look for utf8proc.
 AC_ARG_ENABLE(
 	utf8proc,
-	AC_HELP_STRING(--enable-utf8proc, use utf8proc if it is installed)
+	AS_HELP_STRING(--enable-utf8proc, use utf8proc if it is installed)
 )
 if test "x$enable_utf8proc" = xyes; then
+	PKG_CHECK_MODULES(
+		LIBUTF8PROC,
+		libutf8proc,
+		[
+			AM_CPPFLAGS="$LIBUTF8PROC_CFLAGS $AM_CPPFLAGS"
+			CPPFLAGS="$LIBUTF8PROC_CFLAGS $SAVED_CPPFLAGS"
+			LIBS="$LIBUTF8PROC_LIBS $LIBS"
+		]
+	)
 	AC_CHECK_HEADER(utf8proc.h, enable_utf8proc=yes, enable_utf8proc=no)
 	if test "x$enable_utf8proc" = xyes; then
 		AC_SEARCH_LIBS(
@@ -353,15 +412,67 @@ if test "x$enable_utf8proc" = xyes; then
 fi
 AM_CONDITIONAL(HAVE_UTF8PROC, [test "x$enable_utf8proc" = xyes])
 
+# Check for systemd support.
+AC_ARG_ENABLE(
+	systemd,
+	AS_HELP_STRING(--enable-systemd, enable systemd integration)
+)
+if test x"$enable_systemd" = xyes; then
+	PKG_CHECK_MODULES(
+		SYSTEMD,
+		libsystemd,
+		[
+			AM_CPPFLAGS="$SYSTEMD_CFLAGS $AM_CPPFLAGS"
+			CPPFLAGS="$AM_CPPFLAGS $SAVED_CPPFLAGS"
+			LIBS="$SYSTEMD_LIBS $LIBS"
+			found_systemd=yes
+		],
+		found_systemd=no
+	)
+	if test "x$found_systemd" = xyes; then
+		AC_DEFINE(HAVE_SYSTEMD)
+	else
+		AC_MSG_ERROR("systemd not found")
+	fi
+fi
+AM_CONDITIONAL(HAVE_SYSTEMD, [test "x$found_systemd" = xyes])
+AC_ARG_ENABLE(
+	cgroups,
+	AS_HELP_STRING(--disable-cgroups, disable adding panes to new cgroups with systemd)
+)
+if test "x$enable_cgroups" = x; then
+	# Default to the same as $enable_systemd.
+	enable_cgroups=$enable_systemd
+fi
+if test "x$enable_cgroups" = xyes; then
+	if test "x$found_systemd" = xyes; then
+		AC_DEFINE(ENABLE_CGROUPS)
+	else
+		AC_MSG_ERROR("cgroups requires systemd to be enabled")
+	fi
+fi
+
+# Enable sixel support.
+AC_ARG_ENABLE(
+	sixel,
+	AS_HELP_STRING(--enable-sixel, enable sixel images)
+)
+if test "x$enable_sixel" = xyes; then
+	AC_DEFINE(ENABLE_SIXEL)
+fi
+AM_CONDITIONAL(ENABLE_SIXEL, [test "x$enable_sixel" = xyes])
+
 # Check for b64_ntop. If we have b64_ntop, we assume b64_pton as well.
 AC_MSG_CHECKING(for b64_ntop)
-AC_TRY_LINK(
+AC_LINK_IFELSE([AC_LANG_PROGRAM(
 	[
 		#include <sys/types.h>
 		#include <netinet/in.h>
 		#include <resolv.h>
 	],
-	[b64_ntop(NULL, 0, NULL, 0);],
+	[
+		b64_ntop(NULL, 0, NULL, 0);
+	])],
 	found_b64_ntop=yes,
 	found_b64_ntop=no
 )
@@ -370,13 +481,15 @@ OLD_LIBS="$LIBS"
 if test "x$found_b64_ntop" = xno; then
 	AC_MSG_CHECKING(for b64_ntop with -lresolv)
 	LIBS="$OLD_LIBS -lresolv"
-	AC_TRY_LINK(
+	AC_LINK_IFELSE([AC_LANG_PROGRAM(
 		[
 			#include <sys/types.h>
 			#include <netinet/in.h>
 			#include <resolv.h>
 		],
-		[b64_ntop(NULL, 0, NULL, 0);],
+		[
+			b64_ntop(NULL, 0, NULL, 0);
+		])],
 		found_b64_ntop=yes,
 		found_b64_ntop=no
 	)
@@ -385,13 +498,15 @@ fi
 if test "x$found_b64_ntop" = xno; then
 	AC_MSG_CHECKING(for b64_ntop with -lnetwork)
 	LIBS="$OLD_LIBS -lnetwork"
-	AC_TRY_LINK(
+	AC_LINK_IFELSE([AC_LANG_PROGRAM(
 		[
 			#include <sys/types.h>
 			#include <netinet/in.h>
 			#include <resolv.h>
 		],
-		[b64_ntop(NULL, 0, NULL, 0);],
+		[
+			b64_ntop(NULL, 0, NULL, 0);
+		])],
 		found_b64_ntop=yes,
 		found_b64_ntop=no
 	)
@@ -434,6 +549,24 @@ if test "x$found_malloc_trim" = xyes; then
 	AC_DEFINE(HAVE_MALLOC_TRIM)
 fi
 
+# Build against jemalloc if requested.
+AC_ARG_ENABLE(
+	jemalloc,
+	AS_HELP_STRING(--enable-jemalloc, use jemalloc if it is installed)
+)
+if test "x$enable_jemalloc" = xyes; then
+	PKG_CHECK_MODULES(
+		JEMALLOC,
+		jemalloc,
+		[
+			AM_CPPFLAGS="$JEMALLOC_CFLAGS $AM_CPPFLAGS"
+			CPPFLAGS="$AM_CPPFLAGS $SAVED_CPPFLAGS"
+			LIBS="$LIBS $JEMALLOC_LIBS"
+		],
+		AC_MSG_ERROR("jemalloc not found")
+	)
+fi
+
 # Check for CMSG_DATA. On some platforms like HP-UX this requires UNIX 95
 # (_XOPEN_SOURCE and _XOPEN_SOURCE_EXTENDED) (see xopen_networking(7)). On
 # others, UNIX 03 (_XOPEN_SOURCE 600, see standards(7) on Solaris).
@@ -505,9 +638,9 @@ else
 	AC_LIBOBJ(err)
 fi
 
-# Look for imsg_init in libutil.
-AC_SEARCH_LIBS(imsg_init, util, found_imsg_init=yes, found_imsg_init=no)
-if test "x$found_imsg_init" = xyes; then
+# Look for imsg_add in libutil.
+AC_SEARCH_LIBS(imsg_add, util, found_imsg_add=yes, found_imsg_add=no)
+if test "x$found_imsg_add" = xyes; then
 	AC_DEFINE(HAVE_IMSG)
 else
 	AC_LIBOBJ(imsg)
@@ -588,7 +721,7 @@ AC_CHECK_DECL(
 )
 AC_CHECK_DECL(
 	TAILQ_PREV,
-	found_queue_h=yes,
+	,
 	found_queue_h=no,
 	[#include <sys/queue.h>]
 )
@@ -644,6 +777,14 @@ AC_CHECK_DECL(
 	[#include <sys/prctl.h>]
 )
 
+# Look for setsockopt(SO_PEERCRED).
+AC_CHECK_DECL(
+	SO_PEERCRED,
+	AC_DEFINE(HAVE_SO_PEERCRED),
+	,
+	[#include <sys/socket.h>]
+)
+
 # Look for fcntl(F_CLOSEM).
 AC_CHECK_DECL(
 	F_CLOSEM,
@@ -661,6 +802,74 @@ else
 	AC_MSG_RESULT(no)
 fi
 
+# Try to figure out what the best value for TERM might be.
+if test "x$DEFAULT_TERM" = x; then
+	DEFAULT_TERM=screen
+	AC_MSG_CHECKING(TERM)
+	AC_RUN_IFELSE([AC_LANG_SOURCE(
+		[
+			#include <stdio.h>
+			#include <stdlib.h>
+			#if defined(HAVE_CURSES_H)
+			#include <curses.h>
+			#elif defined(HAVE_NCURSES_H)
+			#include <ncurses.h>
+			#endif
+			#include <term.h>
+			int main(void) {
+				if (setupterm("screen-256color", -1, NULL) != OK)
+					exit(1);
+				exit(0);
+			}
+		 ])],
+		 [DEFAULT_TERM=screen-256color],
+		 ,
+		 [DEFAULT_TERM=screen]
+	)
+	AC_RUN_IFELSE([AC_LANG_SOURCE(
+		[
+			#include <stdio.h>
+			#include <stdlib.h>
+			#if defined(HAVE_CURSES_H)
+			#include <curses.h>
+			#elif defined(HAVE_NCURSES_H)
+			#include <ncurses.h>
+			#endif
+			#include <term.h>
+			int main(void) {
+				if (setupterm("tmux", -1, NULL) != OK)
+					exit(1);
+				exit(0);
+			}
+		 ])],
+		 [DEFAULT_TERM=tmux],
+		 ,
+		 [DEFAULT_TERM=screen]
+	)
+	AC_RUN_IFELSE([AC_LANG_SOURCE(
+		[
+			#include <stdio.h>
+			#include <stdlib.h>
+			#if defined(HAVE_CURSES_H)
+			#include <curses.h>
+			#elif defined(HAVE_NCURSES_H)
+			#include <ncurses.h>
+			#endif
+			#include <term.h>
+			int main(void) {
+				if (setupterm("tmux-256color", -1, NULL) != OK)
+					exit(1);
+				exit(0);
+			}
+		 ])],
+		 [DEFAULT_TERM=tmux-256color],
+		 ,
+		 [DEFAULT_TERM=screen]
+	)
+	AC_MSG_RESULT($DEFAULT_TERM)
+fi
+AC_SUBST(DEFAULT_TERM)
+
 # Man page defaults to mdoc.
 MANFORMAT=mdoc
 AC_SUBST(MANFORMAT)
@@ -676,19 +885,32 @@ case "$host_os" in
 		AC_MSG_RESULT(darwin)
 		PLATFORM=darwin
 		#
-		# OS X uses __dead2 instead of __dead, like FreeBSD. But it
-		# defines __dead away so it needs to be removed before we can
-		# replace it.
+		# macOS uses __dead2 instead of __dead, like FreeBSD. But it defines
+		# __dead away so it needs to be removed before we can replace it.
 		#
 		AC_DEFINE(BROKEN___DEAD)
 		#
-		# OS X CMSG_FIRSTHDR is broken, so redefine it with a working
-		# one. daemon works but has some stupid side effects, so use
-		# our internal version which has a workaround.
+		# macOS CMSG_FIRSTHDR is broken, so redefine it with a working one.
+		# daemon works but has some stupid side effects, so use our internal
+		# version which has a workaround.
 		#
 		AC_DEFINE(BROKEN_CMSG_FIRSTHDR)
 		AC_LIBOBJ(daemon)
 		AC_LIBOBJ(daemon-darwin)
+		#
+		# macOS wcwidth(3) is bad, so complain and suggest using utf8proc
+		# instead.
+		#
+		if test "x$enable_utf8proc" = x; then
+			AC_MSG_NOTICE([])
+			AC_MSG_NOTICE([	   macOS library support for Unicode is very poor,])
+			AC_MSG_NOTICE([	   particularly for complex codepoints like emojis;])
+			AC_MSG_NOTICE([	   to use these correctly, configuring with])
+			AC_MSG_NOTICE([	   --enable-utf8proc is recommended. To build])
+			AC_MSG_NOTICE([	   without anyway, use --disable-utf8proc])
+			AC_MSG_NOTICE([])
+			AC_MSG_ERROR([must give --enable-utf8proc or --disable-utf8proc])
+		fi
 		;;
 	*dragonfly*)
 		AC_MSG_RESULT(dragonfly)
@@ -723,8 +945,13 @@ case "$host_os" in
 				MANFORMAT=mdoc
 				;;
 			*)
-				# Solaris 2.0 to 11.3 use AT&T nroff.
-				MANFORMAT=man
+				if test `uname -o 2>/dev/null` = illumos; then
+					# Illumos uses mandoc.
+					MANFORMAT=mdoc
+				else
+					# Solaris 2.0 to 11.3 use AT&T nroff.
+					MANFORMAT=man
+				fi
 				;;
 		esac
 		;;
@@ -755,9 +982,23 @@ AM_CONDITIONAL(IS_NETBSD, test "x$PLATFORM" = xnetbsd)
 AM_CONDITIONAL(IS_OPENBSD, test "x$PLATFORM" = xopenbsd)
 AM_CONDITIONAL(IS_SUNOS, test "x$PLATFORM" = xsunos)
 AM_CONDITIONAL(IS_HPUX, test "x$PLATFORM" = xhpux)
+AM_CONDITIONAL(IS_CYGWIN, test "x$PLATFORM" = xcygwin)
 AM_CONDITIONAL(IS_HAIKU, test "x$PLATFORM" = xhaiku)
 AM_CONDITIONAL(IS_UNKNOWN, test "x$PLATFORM" = xunknown)
 
+# Set the default lock command
+DEFAULT_LOCK_CMD="lock -np"
+AC_MSG_CHECKING(lock-command)
+if test "x$PLATFORM" = xlinux; then
+	AC_CHECK_PROG(found_vlock, vlock, yes, no)
+	if test "x$found_vlock" = xyes; then
+		DEFAULT_LOCK_CMD="vlock"
+	fi
+fi
+AC_MSG_RESULT($DEFAULT_LOCK_CMD)
+AC_SUBST(DEFAULT_LOCK_CMD)
+
+
 # Save our CFLAGS/CPPFLAGS/LDFLAGS for the Makefile and restore the old user
 # variables.
 AC_SUBST(AM_CPPFLAGS)
@@ -768,4 +1009,5 @@ AC_SUBST(AM_LDFLAGS)
 LDFLAGS="$SAVED_LDFLAGS"
 
 # autoconf should create a Makefile.
-AC_OUTPUT(Makefile)
+AC_CONFIG_FILES(Makefile)
+AC_OUTPUT

control-notify.c

@@ -234,3 +234,29 @@ control_notify_session_window_changed(struct session *s)
 		    s->curw->window->id);
 	}
 }
+
+void
+control_notify_paste_buffer_changed(const char *name)
+{
+	struct client	*c;
+
+	TAILQ_FOREACH(c, &clients, entry) {
+		if (!CONTROL_SHOULD_NOTIFY_CLIENT(c))
+			continue;
+
+		control_write(c, "%%paste-buffer-changed %s", name);
+	}
+}
+
+void
+control_notify_paste_buffer_deleted(const char *name)
+{
+	struct client	*c;
+
+	TAILQ_FOREACH(c, &clients, entry) {
+		if (!CONTROL_SHOULD_NOTIFY_CLIENT(c))
+			continue;
+
+		control_write(c, "%%paste-buffer-deleted %s", name);
+	}
+}

control.c

@@ -385,7 +385,7 @@ control_pause_pane(struct client *c, struct window_pane *wp)
 }
 
 /* Write a line. */
-static void
+static void printflike(2, 0)
 control_vwrite(struct client *c, const char *fmt, va_list ap)
 {
 	struct control_state	*cs = c->control_state;
@@ -664,7 +664,7 @@ control_write_pending(struct client *c, struct control_pane *cp, size_t limit)
 	uint64_t		 age, t = get_timer();
 
 	wp = control_window_pane(c, cp->pane);
-	if (wp == NULL) {
+	if (wp == NULL || wp->fd == -1) {
 		TAILQ_FOREACH_SAFE(cb, &cp->blocks, entry, cb1) {
 			TAILQ_REMOVE(&cp->blocks, cb, entry);
 			control_free_block(cs, cb);
@@ -775,13 +775,16 @@ control_start(struct client *c)
 
 	cs->read_event = bufferevent_new(c->fd, control_read_callback,
 	    control_write_callback, control_error_callback, c);
-	bufferevent_enable(cs->read_event, EV_READ);
+	if (cs->read_event == NULL)
+		fatalx("out of memory");
 
 	if (c->flags & CLIENT_CONTROLCONTROL)
 		cs->write_event = cs->read_event;
 	else {
 		cs->write_event = bufferevent_new(c->out_fd, NULL,
 		    control_write_callback, control_error_callback, c);
+		if (cs->write_event == NULL)
+			fatalx("out of memory");
 	}
 	bufferevent_setwatermark(cs->write_event, EV_WRITE, CONTROL_BUFFER_LOW,
 	    0);
@@ -792,6 +795,13 @@ control_start(struct client *c)
 	}
 }
 
+/* Control client ready. */
+void
+control_ready(struct client *c)
+{
+	bufferevent_enable(c->control_state->read_event, EV_READ);
+}
+
 /* Discard all output for a client. */
 void
 control_discard(struct client *c)
@@ -864,7 +874,7 @@ control_check_subs_pane(struct client *c, struct control_sub *csub)
 	struct control_sub_pane	*csp, find;
 
 	wp = window_pane_find_by_id(csub->id);
-	if (wp == NULL)
+	if (wp == NULL || wp->fd == -1)
 		return;
 	w = wp->window;
 

environ.c

@@ -182,9 +182,11 @@ void
 environ_update(struct options *oo, struct environ *src, struct environ *dst)
 {
 	struct environ_entry		*envent;
+	struct environ_entry		*envent1;
 	struct options_entry		*o;
 	struct options_array_item	*a;
 	union options_value		*ov;
+	int				 found;
 
 	o = options_get(oo, "update-environment");
 	if (o == NULL)
@@ -192,14 +194,15 @@ environ_update(struct options *oo, struct environ *src, struct environ *dst)
 	a = options_array_first(o);
 	while (a != NULL) {
 		ov = options_array_item_value(a);
-		RB_FOREACH(envent, environ, src) {
-			if (fnmatch(ov->string, envent->name, 0) == 0)
-				break;
+		found = 0;
+		RB_FOREACH_SAFE(envent, environ, src, envent1) {
+			if (fnmatch(ov->string, envent->name, 0) == 0) {
+				environ_set(dst, envent->name, 0, "%s", envent->value);
+				found = 1;
+			}
 		}
-		if (envent == NULL)
+		if (!found)
 			environ_clear(dst, ov->string);
-		else
-			environ_set(dst, envent->name, 0, "%s", envent->value);
 		a = options_array_next(a);
 	}
 }
@@ -261,6 +264,12 @@ environ_for_session(struct session *s, int no_TERM)
 		environ_set(env, "TERM_PROGRAM_VERSION", 0, "%s", getversion());
 	}
 
+#ifdef HAVE_SYSTEMD
+	environ_clear(env, "LISTEN_PID");
+	environ_clear(env, "LISTEN_FDS");
+	environ_clear(env, "LISTEN_FDNAMES");
+#endif
+
 	if (s != NULL)
 		idx = s->id;
 	else

example_tmux.conf

@@ -14,7 +14,7 @@ set -g status-bg red
 %endif
 
 # Enable RGB colour if running in xterm(1)
-set-option -sa terminal-overrides ",xterm*:Tc"
+set-option -sa terminal-features ",xterm*:RGB"
 
 # Change the default $TERM to tmux-256color
 set -g default-terminal "tmux-256color"
@@ -61,7 +61,7 @@ bind y set synchronize-panes\; display 'synchronize-panes #{?synchronize-panes,o
 # should be started with "tmux attach" rather than "tmux new"
 new -d -s0 -nirssi 'exec irssi'
 set -t0:0 monitor-activity on
-set  -t0:0 aggressive-resize on
+set -t0:0 aggressive-resize on
 neww -d -ntodo 'exec emacs ~/TODO'
 setw -t0:1 aggressive-resize on
 neww -d -nmutt 'exec mutt'