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 <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. */
27 int
__utimensat64_helper(int fd,const char * file,const struct __timespec64 tsp64[2],int flags)28 __utimensat64_helper (int fd, const char *file,
29 const struct __timespec64 tsp64[2], int flags)
30 {
31 #ifndef __NR_utimensat_time64
32 # define __NR_utimensat_time64 __NR_utimensat
33 #endif
34
35 #ifdef __ASSUME_TIME64_SYSCALLS
36 return INLINE_SYSCALL_CALL (utimensat_time64, fd, file, &tsp64[0], flags);
37 #else
38 /* For UTIME_NOW and UTIME_OMIT the value of tv_sec field is ignored. */
39 # define TS_SPECIAL(ts) \
40 ((ts).tv_nsec == UTIME_NOW || (ts).tv_nsec == UTIME_OMIT)
41
42 bool need_time64 = tsp64 != NULL
43 && ((!TS_SPECIAL (tsp64[0])
44 && !in_time_t_range (tsp64[0].tv_sec))
45 || (!TS_SPECIAL (tsp64[1])
46 && !in_time_t_range (tsp64[1].tv_sec)));
47 if (need_time64)
48 {
49 int r = INLINE_SYSCALL_CALL (utimensat_time64, fd, file, &tsp64[0],
50 flags);
51 if (r == 0 || errno != ENOSYS)
52 return r;
53 __set_errno (EOVERFLOW);
54 return -1;
55 }
56
57 struct timespec tsp32[2], *ptsp32 = NULL;
58 if (tsp64)
59 {
60 tsp32[0] = valid_timespec64_to_timespec (tsp64[0]);
61 tsp32[1] = valid_timespec64_to_timespec (tsp64[1]);
62 ptsp32 = tsp32;
63 }
64
65 return INLINE_SYSCALL_CALL (utimensat, fd, file, ptsp32, flags);
66 #endif
67 }
libc_hidden_def(__utimensat64_helper)68 libc_hidden_def (__utimensat64_helper)
69
70 /* Change the access time of FILE to TSP[0] and
71 the modification time of FILE to TSP[1].
72
73 Starting with 2.6.22 the Linux kernel has the utimensat syscall. */
74 int
75 __utimensat64 (int fd, const char *file, const struct __timespec64 tsp64[2],
76 int flags)
77 {
78 if (file == NULL)
79 return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
80
81 return __utimensat64_helper (fd, file, &tsp64[0], flags);
82 }
83
84 #if __TIMESIZE != 64
libc_hidden_def(__utimensat64)85 libc_hidden_def (__utimensat64)
86
87 int
88 __utimensat (int fd, const char *file, const struct timespec tsp[2],
89 int flags)
90 {
91 struct __timespec64 tsp64[2];
92 if (tsp)
93 {
94 tsp64[0] = valid_timespec_to_timespec64 (tsp[0]);
95 tsp64[1] = valid_timespec_to_timespec64 (tsp[1]);
96 }
97
98 return __utimensat64 (fd, file, tsp ? &tsp64[0] : NULL, flags);
99 }
100 #endif
101 weak_alias (__utimensat, utimensat)
102