sysdeps/unix/sysv/linux/futimens.c

   1 /* Change access and modification times of open file.  Linux version.
   2    Copyright (C) 2007-2021 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   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, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <fcntl.h>
  21 #include <string.h>
  22 #include <time.h>
  23 #include <sysdep.h>
  24
  25
  26 /* Change the access time of the file associated with FD to TSP[0] and
  27    the modification time of FILE to TSP[1].
  28
  29    Starting with 2.6.22 the Linux kernel has the utimensat syscall which
  30    can be used to implement futimens.  */
  31 int
  32 __futimens64 (int fd, const struct __timespec64 tsp64[2])
  33 {
  34   if (fd < 0)
  35     return INLINE_SYSCALL_ERROR_RETURN_VALUE (EBADF);
  36
  37   return __utimensat64_helper (fd, NULL, &tsp64[0], 0);
  38 }
  39
  40 #if __TIMESIZE != 64
  41 libc_hidden_def (__futimens64);
  42
  43 int
  44 __futimens (int fd, const struct timespec tsp[2])
  45 {
  46   struct __timespec64 tsp64[2];
  47   if (tsp)
  48     {
  49       tsp64[0] = valid_timespec_to_timespec64 (tsp[0]);
  50       tsp64[1] = valid_timespec_to_timespec64 (tsp[1]);
  51     }
  52
  53   return __futimens64 (fd, tsp ? &tsp64[0] : NULL);
  54 }
  55 #endif
  56 weak_alias (__futimens, futimens)