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82bae9f9 UD |
1 | /* futimes -- change access and modification times of open file. Stub version. |
2 | Copyright (C) 2002, 2003 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, write to the Free | |
17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
18 | 02111-1307 USA. */ | |
19 | ||
20 | #include <errno.h> | |
21 | #include <sysdep.h> | |
22 | #include <utime.h> | |
23 | #include <sys/time.h> | |
24 | #include <stdio-common/_itoa.h> | |
25 | ||
f4e0175f UD |
26 | #include "kernel-features.h" |
27 | ||
82bae9f9 UD |
28 | /* Change the access time of FILE to TVP[0] and |
29 | the modification time of FILE to TVP[1], but do not follow symlinks. | |
30 | ||
31 | The Linux kernel has no futimes() syscall so we use the /proc | |
32 | filesystem. */ | |
33 | int | |
34 | __futimes (int fd, const struct timeval tvp[2]) | |
35 | { | |
36 | static const char selffd[] = "/proc/self/fd/"; | |
f4e0175f UD |
37 | char fname[sizeof (selffd) + 3 * sizeof (int)]; |
38 | fname[sizeof (fname) - 1] = '\0'; | |
b1b060c3 | 39 | char *cp = _itoa_word ((unsigned int) fd, fname + sizeof (fname) - 1, 10, 0); |
82bae9f9 UD |
40 | cp = memcpy (cp - sizeof (selffd) + 1, selffd, sizeof (selffd) - 1); |
41 | ||
42 | #ifdef __NR_utimes | |
43 | int result = INLINE_SYSCALL (utimes, 2, cp, tvp); | |
44 | # ifndef __ASSUME_UTIMES | |
45 | if (result != -1 || errno != ENOSYS) | |
46 | # endif | |
47 | return result; | |
48 | #endif | |
49 | ||
50 | /* The utimes() syscall does not exist or is not available in the | |
51 | used kernel. Use utime(). For this we have to convert to the | |
52 | data format utime() expects. */ | |
53 | #ifndef __ASSUME_UTIMES | |
f4e0175f UD |
54 | struct utimbuf buf; |
55 | struct utimbuf *times; | |
56 | ||
57 | if (tvp != NULL) | |
82bae9f9 | 58 | { |
f4e0175f UD |
59 | times = &buf; |
60 | buf.actime = tvp[0].tv_sec + tvp[0].tv_usec >= 500000; | |
61 | buf.modtime = tvp[1].tv_sec + tvp[1].tv_usec >= 500000; | |
62 | } | |
63 | else | |
64 | times = NULL; | |
65 | ||
66 | return INLINE_SYSCALL (utime, 2, cp, times); | |
82bae9f9 UD |
67 | #endif |
68 | } | |
69 | weak_alias (__futimes, futimes) |