AC_DEFUN([gl_FUNC_UTIMES],
[
AC_CACHE_CHECK([determine whether the utimes function works],
gl_cv_func_working_utimes,
[
AC_RUN_IFELSE([AC_LANG_SOURCE([[
int
main ()
{
static struct timeval timeval[2] = {{9, 10}, {999999, 999999}};
struct stat sbuf;
char const *file = "conftest.utimes";
FILE *f;
time_t now;
int fd;
int ok = ((f = fopen (file, "w"))
&& fclose (f) == 0
&& utimes (file, timeval) == 0
&& lstat (file, &sbuf) == 0
&& sbuf.st_atime == timeval[0].tv_sec
&& sbuf.st_mtime == timeval[1].tv_sec);
unlink (file);
if (!ok)
exit (1);
ok =
((f = fopen (file, "w"))
&& fclose (f) == 0
&& time (&now) != (time_t)-1
&& utimes (file, NULL) == 0
&& lstat (file, &sbuf) == 0
&& now - sbuf.st_atime <= 2
&& now - sbuf.st_mtime <= 2);
unlink (file);
if (!ok)
exit (1);
ok = (0 <= (fd = open (file, O_WRONLY|O_CREAT, 0444))
&& close (fd) == 0
&& utimes (file, NULL) == 0);
unlink (file);
exit (!ok);
}
]])],
[gl_cv_func_working_utimes=yes],
[gl_cv_func_working_utimes=no],
[gl_cv_func_working_utimes=no])])
if test $gl_cv_func_working_utimes = yes; then
AC_DEFINE([HAVE_WORKING_UTIMES], 1, [Define if utimes works properly. ])
fi
])