-/* Copyright (C) 1998 Free Software Foundation, Inc.
+/* Copyright (C) 1998, 2001-2004, 2006, 2009-2010 Free Software Foundation,
+ * Inc.
- This program is free software; you can redistribute it and/or modify it
+ This program is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
- Free Software Foundation; either version 2, or (at your option) any
+ Free Software Foundation; either version 3 of the License, or any
later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software Foundation,
- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* derived from a function in touch.c */
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
+#include <config.h>
#undef utime
#include <sys/types.h>
# include <utime.h>
#endif
+#if !HAVE_UTIMES_NULL
+# include <sys/stat.h>
+# include <fcntl.h>
+#endif
+
+#include <unistd.h>
+#include <errno.h>
+
#include "full-write.h"
#include "safe-read.h"
};
#endif
+/* The results of open() in this file are not used with fchdir,
+ therefore save some unnecessary work in fchdir.c. */
+#undef open
+#undef close
+
/* Emulate utime (file, NULL) for systems (like 4.3BSD) that do not
interpret it to set the access and modification times of FILE to
the current time. Return 0 if successful, -1 if not. */
int fd;
char c;
int status = 0;
- struct stat sb;
+ struct stat st;
+ int saved_errno = 0;
fd = open (file, O_RDWR);
if (fd < 0
- || fstat (fd, &sb) < 0
- || safe_read (fd, &c, sizeof c) < 0
+ || fstat (fd, &st) < 0
+ || safe_read (fd, &c, sizeof c) == SAFE_READ_ERROR
|| lseek (fd, (off_t) 0, SEEK_SET) < 0
|| full_write (fd, &c, sizeof c) != sizeof c
- /* Maybe do this -- it's necessary on SunOS4.1.3 with some combination
- of patches, but that system doesn't use this code: it has utimes.
- || fsync (fd) < 0
+ /* Maybe do this -- it's necessary on SunOS 4.1.3 with some combination
+ of patches, but that system doesn't use this code: it has utimes.
+ || fsync (fd) < 0
*/
- || ftruncate (fd, st.st_size) < 0
- || close (fd) < 0)
- status = -1;
+ || (st.st_size == 0 && ftruncate (fd, st.st_size) < 0))
+ {
+ saved_errno = errno;
+ status = -1;
+ }
+
+ if (0 <= fd)
+ {
+ if (close (fd) < 0)
+ status = -1;
+
+ /* If there was a prior failure, use the saved errno value.
+ But if the only failure was in the close, don't change errno. */
+ if (saved_errno)
+ errno = saved_errno;
+ }
+
return status;
#endif
}