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Windows: correct detection of EISDIR in mingw_open()

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According to the Linux open(2) man page, open() must return EISDIR
if a directory was attempted to be opened for writing. Our emulation
in mingw_open() does not get this right: it checks only for O_CREAT.

Fix it to check for a write request.

This fixes a failure in reflog handling, which opens files with
O_APPEND|O_WRONLY, but without O_CREAT, and expects EISDIR when the
named file happens to be a directory.

Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Johannes Sixt 2014-11-16 22:06:26 +01:00 committed by Junio C Hamano
parent 7fa1365c54
commit ba6fad02b6
1 changed files with 1 additions and 1 deletions
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compat/mingw.c
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@ -312,7 +312,7 @@ int mingw_open (const char *filename, int oflags, ...)
return -1;
fd = _wopen(wfilename, oflags, mode);
if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
if (fd < 0 && (oflags & O_ACCMODE) != O_RDONLY && errno == EACCES) {
DWORD attrs = GetFileAttributesW(wfilename);
if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
errno = EISDIR;