sysdeps/unix/sysv/linux/generic/futimesat.c

   1 /* Copyright (C) 2005, 2006, 2009 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <errno.h>
  21 #include <fcntl.h>
  22 #include <stddef.h>
  23 #include <stdio.h>
  24 #include <string.h>
  25 #include <utime.h>
  26 #include <sys/time.h>
  27 #include <sysdep.h>
  28 #include <kernel-features.h>
  29
  30
  31 /* Change the access time of FILE relative to FD to TVP[0] and
  32    the modification time of FILE to TVP[1].  */
  33 int
  34 futimesat (int fd, const char *file, const struct timeval tvp[2])
  35 {
  36   struct timespec tsp[2];
  37   int result;
  38
  39   if (tvp)
  40     {
  41       if (tvp[0].tv_usec >= 1000000 || tvp[0].tv_usec < 0 ||
  42           tvp[1].tv_usec >= 1000000 || tvp[1].tv_usec < 0)
  43         {
  44           __set_errno (EINVAL);
  45           return -1;
  46         }
  47       TIMEVAL_TO_TIMESPEC (&tvp[0], &tsp[0]);
  48       TIMEVAL_TO_TIMESPEC (&tvp[1], &tsp[1]);
  49     }
  50
  51   result = INLINE_SYSCALL (utimensat, 4, fd, file, tvp ? tsp : NULL, 0);
  52   return result;
  53 }