blob: 273a5fb31f39f33c8ed989f759bc5c0ccb158148 [file] [log] [blame]
/* Copyright (C) 1998, 2001, 2002, 2003, 2004, 2006 Free Software
Foundation, Inc.
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
later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
/* derived from a function in touch.c */
#include <config.h>
#undef utime
#include <sys/types.h>
# include <utime.h>
# include <sys/stat.h>
# include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include "full-write.h"
#include "safe-read.h"
/* Some systems (even some that do have <utime.h>) don't declare this
structure anywhere. */
struct utimbuf
long actime;
long modtime;
/* 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. */
static int
utime_null (const char *file)
return utimes (file, 0);
int fd;
char c;
int status = 0;
struct stat st;
int saved_errno = 0;
fd = open (file, O_RDWR);
if (fd < 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 SunOS 4.1.3 with some combination
of patches, but that system doesn't use this code: it has utimes.
|| fsync (fd) < 0
|| (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;
rpl_utime (const char *file, const struct utimbuf *times)
if (times)
return utime (file, times);
return utime_null (file);