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chown, lchown: Fix regression on Cygwin 2.9.0 (regression today).

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* m4/chown.m4 (AC_FUNC_CHOWN): Restore the previous configure-time test
on OpenBSD and Cygwin platforms.
* doc/posix-functions/chown.texi: Update platforms list.
This commit is contained in:
Bruno Haible
2025-09-21 20:59:20 +02:00
parent 7b85c2a8da
commit eb2c639c9c
3 changed files with 38 additions and 8 deletions
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ChangeLog
+7
View File
@@ -1,3 +1,10 @@
2025-09-21 Bruno Haible <bruno@clisp.org>
chown, lchown: Fix regression on Cygwin 2.9.0 (regression today).
* m4/chown.m4 (AC_FUNC_CHOWN): Restore the previous configure-time test
on OpenBSD and Cygwin platforms.
* doc/posix-functions/chown.texi: Update platforms list.
2025-09-21 Bruno Haible <bruno@clisp.org>
lchown: Fix compilation error on macOS (regression today).
doc/posix-functions/chown.texi
+1 -1
View File
@@ -16,7 +16,7 @@ macOS 14, FreeBSD 7.2, AIX 7.3.1, Solaris 9.
@item
Some platforms fail to update the change time when at least one
argument was not @minus{}1, but no ownership changes resulted:
OpenBSD 7.7.
OpenBSD 7.7, Cygwin 2.9.0.
@item
When passed an argument of @minus{}1, some implementations really set the owner
user/group id of the file to this value, rather than leaving that id of the
m4/chown.m4
+30 -7
View File
@@ -1,5 +1,5 @@
# chown.m4
# serial 38
# serial 39
dnl Copyright (C) 1997-2001, 2003-2005, 2007, 2009-2025 Free Software
dnl Foundation, Inc.
dnl This file is free software; the Free Software Foundation
@@ -133,13 +133,36 @@ AC_DEFUN_ONCE([gl_FUNC_CHOWN],
dnl OpenBSD fails to update ctime if ownership does not change.
AC_CACHE_CHECK([whether chown updates ctime per POSIX],
[gl_cv_func_chown_ctime_works],
[dnl Although this formerly used AC_RUN_IFELSE, that was tricky
dnl as it depended on timing and file timestamp resolution,
dnl and there were false positives when configuring with Linux fakeroot.
dnl Since the problem occurs only on OpenBSD, just test for that.
[dnl This test is tricky as it depends on timing and file timestamp
dnl resolution, and there were false positives when configuring with
dnl Linux fakeroot. Since the problem occurs only on OpenBSD and Cygwin,
dnl test only on these platforms.
AS_CASE([$host_os],
[openbsd*], [gl_cv_func_chown_ctime_works=no],
[gl_cv_func_chown_ctime_works=yes])])
[openbsd* | cygwin*],
[AC_RUN_IFELSE([AC_LANG_PROGRAM([[
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
]GL_MDA_DEFINES],
[[struct stat st1, st2;
if (close (creat ("conftest.file", 0600))) return 1;
if (stat ("conftest.file", &st1)) return 2;
sleep (1);
if (chown ("conftest.file", st1.st_uid, st1.st_gid)) return 3;
if (stat ("conftest.file", &st2)) return 4;
if (st2.st_ctime <= st1.st_ctime) return 5;
]])],
[gl_cv_func_chown_ctime_works=yes],
[gl_cv_func_chown_ctime_works=no],
[# Obey --enable-cross-guesses.
gl_cv_func_chown_ctime_works="$gl_cross_guess_normal"
])
rm -f conftest.file
],
[gl_cv_func_chown_ctime_works=yes])
])
case "$gl_cv_func_chown_ctime_works" in
*yes) ;;
*)