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pg_upgrade: Report full disk better

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Previously, pg_upgrade would abort copy_file() on a short write without
setting errno, which the caller would report as an error with the
message "Success".  We assume ENOSPC in that case, as we do elsewhere in
the code.  Also set errno in some other error cases in copy_file() to
avoid bogus "Success" error messages.

This was broken in 6b711cf37c228749b6a8cef50e16e3c587d18dd4, so 9.2 and
before are OK.
This commit is contained in:
Peter Eisentraut 2013-11-18 21:49:40 -05:00
parent 0dbf9a6a91
commit bd5a9a50e4
1 changed files with 9 additions and 0 deletions
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9
contrib/pg_upgrade/file.c
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@ -136,16 +136,22 @@ copy_file(const char *srcfile, const char *dstfile, bool force)
int save_errno = 0;
if ((srcfile == NULL) || (dstfile == NULL))
{
errno = EINVAL;
return -1;
}
if ((src_fd = open(srcfile, O_RDONLY, 0)) < 0)
return -1;
if ((dest_fd = open(dstfile, O_RDWR | O_CREAT | (force ? 0 : O_EXCL), S_IRUSR | S_IWUSR)) < 0)
{
save_errno = errno;
if (src_fd != 0)
close(src_fd);
errno = save_errno;
return -1;
}
@ -170,6 +176,9 @@ copy_file(const char *srcfile, const char *dstfile, bool force)
if (write(dest_fd, buffer, nbytes) != nbytes)
{
/* if write didn't set errno, assume problem is no disk space */
if (errno == 0)
errno = ENOSPC;
save_errno = errno;
ret = -1;
break;