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b2970919 | 1 | /* Check if path supports 64-bit time interfaces. |
581c785b | 2 | Copyright (C) 2021-2022 Free Software Foundation, Inc. |
b2970919 AZ |
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 <fcntl.h> | |
5d98a7da | 20 | #include <unistd.h> |
b2970919 AZ |
21 | #include <support/check.h> |
22 | #include <support/support.h> | |
23 | #include <sys/stat.h> | |
24 | #ifdef __linux__ | |
25 | #include <sysdep.h> | |
26 | #endif | |
27 | ||
28 | #ifdef __linux__ | |
29 | static int | |
30 | utimesat_call (const char *path, const struct __timespec64 tsp[2]) | |
31 | { | |
32 | # ifndef __NR_utimensat_time64 | |
33 | # define __NR_utimensat_time64 __NR_utimensat | |
34 | # endif | |
48593b50 | 35 | return syscall (__NR_utimensat_time64, AT_FDCWD, path, &tsp[0], 0); |
b2970919 AZ |
36 | } |
37 | #endif | |
38 | ||
39 | bool | |
6fbc0540 | 40 | support_path_support_time64_value (const char *path, int64_t at, int64_t mt) |
b2970919 AZ |
41 | { |
42 | #ifdef __linux__ | |
43 | /* Obtain the original timestamps to restore at the end. */ | |
44 | struct statx ostx; | |
45 | TEST_VERIFY_EXIT (statx (AT_FDCWD, path, 0, STATX_BASIC_STATS, &ostx) == 0); | |
46 | ||
6fbc0540 AZ |
47 | const struct __timespec64 tsp[] = { { at, 0 }, { mt, 0 } }; |
48 | ||
b2970919 AZ |
49 | /* Return is kernel does not support __NR_utimensat_time64. */ |
50 | if (utimesat_call (path, tsp) == -1) | |
51 | return false; | |
52 | ||
53 | /* Verify if the last access and last modification time match the ones | |
54 | obtained with statx. */ | |
55 | struct statx stx; | |
56 | TEST_VERIFY_EXIT (statx (AT_FDCWD, path, 0, STATX_BASIC_STATS, &stx) == 0); | |
57 | ||
58 | bool support = stx.stx_atime.tv_sec == tsp[0].tv_sec | |
59 | && stx.stx_mtime.tv_sec == tsp[1].tv_sec; | |
60 | ||
61 | /* Reset to original timestamps. */ | |
62 | const struct __timespec64 otsp[] = | |
63 | { | |
64 | { ostx.stx_atime.tv_sec, ostx.stx_atime.tv_nsec }, | |
65 | { ostx.stx_mtime.tv_sec, ostx.stx_mtime.tv_nsec }, | |
66 | }; | |
67 | TEST_VERIFY_EXIT (utimesat_call (path, otsp) == 0); | |
68 | ||
69 | return support; | |
70 | #else | |
71 | return true; | |
72 | #endif | |
73 | } |