sysdeps/unix/sysv/linux/lutimes.c

   1 /* Change access and/or modification date of file.  Do not follow symbolic
   2    links.
   3    Copyright (C) 2007-2015 Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <errno.h>
  21 #include <fcntl.h>
  22 #include <time.h>
  23 #include <sys/time.h>
  24 #include <sysdep.h>
  25
  26
  27 int
  28 lutimes (const char *file, const struct timeval tvp[2])
  29 {
  30 #ifdef __NR_utimensat
  31   /* The system call espects timespec, not timeval.  */
  32   struct timespec ts[2];
  33   if (tvp != NULL)
  34     {
  35       if (tvp[0].tv_usec < 0 || tvp[0].tv_usec >= 1000000
  36           || tvp[1].tv_usec < 0 || tvp[1].tv_usec >= 1000000)
  37         {
  38           __set_errno (EINVAL);
  39           return -1;
  40         }
  41
  42       TIMEVAL_TO_TIMESPEC (&tvp[0], &ts[0]);
  43       TIMEVAL_TO_TIMESPEC (&tvp[1], &ts[1]);
  44     }
  45
  46   return INLINE_SYSCALL (utimensat, 4, AT_FDCWD, file, tvp ? ts : NULL,
  47                          AT_SYMLINK_NOFOLLOW);
  48 #else
  49   __set_errno (ENOSYS);
  50   return -1;
  51 #endif
  52 }
  53
  54 #ifndef __NR_utimensat
  55 stub_warning (lutimes)
  56 #endif