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Windows: fix utime() for read-only files

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Starting with 5256b00 (Use git_mkstemp_mode instead of plain mkstemp to
create object files, 2010-02-22) utime() is invoked on read-only files.
This is not allowed on Windows and results in many warnings of the form

failed utime() on .git/objects/23/tmp_obj_VlgHlc: Permission denied

during a repack.  Fix it by making the file temporarily writable.

Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Johannes Sixt 2010-03-30 09:46:23 +02:00 committed by Junio C Hamano
parent da1fbed3ff
commit 852f098c06
1 changed files with 18 additions and 2 deletions
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20
compat/mingw.c
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@ -259,8 +259,17 @@ int mingw_utime (const char *file_name, const struct utimbuf *times)
int fh, rc;
/* must have write permission */
if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0)
return -1;
DWORD attrs = GetFileAttributes(file_name);
if (attrs != INVALID_FILE_ATTRIBUTES &&
(attrs & FILE_ATTRIBUTE_READONLY)) {
/* ignore errors here; open() will report them */
SetFileAttributes(file_name, attrs & ~FILE_ATTRIBUTE_READONLY);
}
if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) {
rc = -1;
goto revert_attrs;
}
time_t_to_filetime(times->modtime, &mft);
time_t_to_filetime(times->actime, &aft);
@ -270,6 +279,13 @@ int mingw_utime (const char *file_name, const struct utimbuf *times)
} else
rc = 0;
close(fh);
revert_attrs:
if (attrs != INVALID_FILE_ATTRIBUTES &&
(attrs & FILE_ATTRIBUTE_READONLY)) {
/* ignore errors again */
SetFileAttributes(file_name, attrs);
}
return rc;
}