1/* futimes -- change access and modification times of open file. Linux version.
2 Copyright (C) 2002-2017 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 <http://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <sysdep.h>
21#include <string.h>
22#include <time.h>
23#include <utime.h>
24#include <sys/time.h>
25#include <_itoa.h>
26#include <fcntl.h>
27
28
29/* Change the access time of the file associated with FD to TVP[0] and
30 the modification time of FILE to TVP[1].
31
32 Starting with 2.6.22 the Linux kernel has the utimensat syscall which
33 can be used to implement futimes. */
34int
35__futimes (int fd, const struct timeval tvp[2])
36{
37 /* The utimensat system call expects timespec not timeval. */
38 struct timespec ts[2];
39 if (tvp != NULL)
40 {
41 if (tvp[0].tv_usec < 0 || tvp[0].tv_usec >= 1000000
42 || tvp[1].tv_usec < 0 || tvp[1].tv_usec >= 1000000)
43 return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
44
45 TIMEVAL_TO_TIMESPEC (&tvp[0], &ts[0]);
46 TIMEVAL_TO_TIMESPEC (&tvp[1], &ts[1]);
47 }
48
49 return INLINE_SYSCALL (utimensat, 4, fd, NULL, tvp ? &ts : NULL, 0);
50}
51weak_alias (__futimes, futimes)
52