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50dd7de226
If libvirt is not running virsh can't connect to it and will complain that the socket does not exist.
196 lines
4.0 KiB
Bash
Executable File
196 lines
4.0 KiB
Bash
Executable File
#!/bin/bash
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# provides some general-purpose script functions
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#
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# Copyright (C) 2004 Eric Marchionni, Patrik Rayo
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# Zuercher Hochschule Winterthur
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#
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# This program is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the
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# Free Software Foundation; either version 2 of the License, or (at your
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# option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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# for more details.
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export TERM=xterm
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RED=$(tput setaf 1)
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GREEN=$(tput setaf 2)
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NORMAL=$(tput op)
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# exit with given error message
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# $1 - error message
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die() {
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echo -e "${RED}$1${NORMAL}"
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exit 1
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}
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# execute command
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# $1 - command to execute
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# $2 - whether or not to log command exit status
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# (0 -> disable exit status logging)
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execute()
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{
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cmd=${1}
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echo $cmd >>$LOGFILE 2>&1
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$cmd >>$LOGFILE 2>&1
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status=$?
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[ "$2" != 0 ] && log_status $status
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if [ $status != 0 ]; then
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echo
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echo "! Command $cmd failed, exiting (status $status)"
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echo "! Check why here $LOGFILE"
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exit 1
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fi
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}
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# execute command in chroot
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# $1 - command to execute
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execute_chroot()
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{
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execute "chroot $LOOPDIR $@"
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}
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# write green status message to console
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# $1 - msg
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echo_ok()
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{
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echo -e "${GREEN}$1${NORMAL}"
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}
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# write red status message to console
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# $1 - msg
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echo_failed()
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{
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echo -e "${RED}$1${NORMAL}"
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}
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# log an action
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# $1 - current action description
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log_action()
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{
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/bin/echo -n "[....] $1 "
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}
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# log an action status
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# $1 - exit status of action
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log_status()
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{
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tput hpa 0
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if [ $1 -eq 0 ]; then
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/bin/echo -ne "[${GREEN} ok ${NORMAL}"
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else
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/bin/echo -ne "[${RED}FAIL${NORMAL}"
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fi
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echo
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}
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# the following two functions are stolen from [1]
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# [1] - http://www.linuxjournal.com/content/use-bash-trap-statement-cleanup-temporary-files
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declare -a on_exit_items
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# perform registered actions on exit
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on_exit()
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{
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for ((onex=${#on_exit_items[@]}-1; onex>=0; onex--))
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do
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echo "On_Exit: ${on_exit_items[$onex]}" >>$LOGFILE
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${on_exit_items[$onex]} >>$LOGFILE 2>&1
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done
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on_exit_items=""
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trap - EXIT
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}
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# register a command to execute when the calling script terminates. The
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# registered commands are called in FILO order.
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# $* - command to register
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do_on_exit()
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{
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local n=${#on_exit_items[*]}
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on_exit_items[$n]="$*"
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if [ $n -eq 0 ]; then
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trap on_exit EXIT
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fi
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}
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# wait for a mount to disappear
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# $1 - device/image to wait for
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# $2 - maximum time to wait in seconds, default is 5 seconds
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graceful_umount()
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{
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secs=$2
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[ ! $secs ] && secs=5
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let steps=$secs*100
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for st in `seq 1 $steps`
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do
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umount $1 >>$LOGFILE 2>&1
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mount | grep $1 >/dev/null 2>&1
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[ $? -eq 0 ] || return 0
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sleep 0.01
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done
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return 1
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}
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# load qemu NBD kernel module, if not already loaded
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load_qemu_nbd()
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{
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lsmod | grep ^nbd[[:space:]]* >/dev/null 2>&1
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if [ $? != 0 ]
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then
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log_action "Loading NBD kernel module"
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execute "modprobe nbd max_part=16"
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fi
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}
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# check if given commands exist in $PATH
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# $* - commands to check
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check_commands()
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{
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for i in $*
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do
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command -v $i >/dev/null || { die "Required command $i not found"; exit 1; }
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done
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}
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# check if any of the given virtual guests are running
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# $* - names of guests to check
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running_any()
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{
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command -v virsh >/dev/null || return 1
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for host in $*
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do
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virsh list --name 2>/dev/null | grep "^$host$" >/dev/null && return 0
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done
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return 1
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}
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#############################################
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# search and replace strings throughout a
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# whole directory
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#
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function searchandreplace {
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SEARCHSTRING="$1"
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REPLACESTRING="$2"
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DESTDIR="$3"
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[ -d "$DESTDIR" ] || die "$DESTDIR is not a directory!"
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###########################################
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# search and replace in each found file the
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# given string
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#
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for eachfoundfile in `find $DESTDIR -type f`
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do
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sed -i -e "s/$SEARCHSTRING/$REPLACESTRING/g" "$eachfoundfile"
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done
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}
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