1/* Change access and modification times of open file. Linux version.
2 Copyright (C) 2007-2020 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 <sys/stat.h>
21#include <sysdep.h>
22#include <time.h>
23#include <kernel-features.h>
24
25/* Helper function defined for easy reusage of the code which calls utimensat
26 and utimensat_time64 syscall. */
27int
28__utimensat64_helper (int fd, const char *file,
29 const struct __timespec64 tsp64[2], int flags)
30{
31#ifdef __ASSUME_TIME64_SYSCALLS
32# ifndef __NR_utimensat_time64
33# define __NR_utimensat_time64 __NR_utimensat
34# endif
35 return INLINE_SYSCALL (utimensat_time64, 4, fd, file, &tsp64[0], flags);
36#else
37# ifdef __NR_utimensat_time64
38 int ret = INLINE_SYSCALL (utimensat_time64, 4, fd, file, &tsp64[0], flags);
39 if (ret == 0 || errno != ENOSYS)
40 return ret;
41# endif
42 if (tsp64
43 && (! in_time_t_range (tsp64[0].tv_sec)
44 || ! in_time_t_range (tsp64[1].tv_sec)))
45 {
46 __set_errno (EOVERFLOW);
47 return -1;
48 }
49
50 struct timespec tsp32[2];
51 if (tsp64)
52 {
53 tsp32[0] = valid_timespec64_to_timespec (tsp64[0]);
54 tsp32[1] = valid_timespec64_to_timespec (tsp64[1]);
55 }
56
57 return INLINE_SYSCALL (utimensat, 4, fd, file, tsp64 ? &tsp32[0] : NULL,
58 flags);
59#endif
60
61}
62libc_hidden_def (__utimensat64_helper)
63
64/* Change the access time of FILE to TSP[0] and
65 the modification time of FILE to TSP[1].
66
67 Starting with 2.6.22 the Linux kernel has the utimensat syscall. */
68int
69__utimensat64 (int fd, const char *file, const struct __timespec64 tsp64[2],
70 int flags)
71{
72 if (file == NULL)
73 return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
74
75 return __utimensat64_helper (fd, file, &tsp64[0], flags);
76}
77
78#if __TIMESIZE != 64
79libc_hidden_def (__utimensat64)
80
81int
82__utimensat (int fd, const char *file, const struct timespec tsp[2],
83 int flags)
84{
85 struct __timespec64 tsp64[2];
86 if (tsp)
87 {
88 tsp64[0] = valid_timespec_to_timespec64 (tsp[0]);
89 tsp64[1] = valid_timespec_to_timespec64 (tsp[1]);
90 }
91
92 return __utimensat64 (fd, file, tsp ? &tsp64[0] : NULL, flags);
93}
94#endif
95weak_alias (__utimensat, utimensat)
96