1 /*-
2 * Copyright (c) 2015 Jilles Tjoelker
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 #include <sys/stat.h>
29
30 #include <errno.h>
31 #include <fcntl.h>
32 #include <time.h>
33
34 #ifndef UTIME_NOW
35 #define UTIME_NOW -1
36 #define UTIME_OMIT -2
37 #endif
38
39 int
utimensat(int fd,const char * path,const struct timespec times[2],int flag)40 utimensat(int fd, const char *path, const struct timespec times[2], int flag)
41 {
42 struct timeval now, tv[2], *tvp;
43 struct stat sb;
44 int osreldate;
45
46 if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0) {
47 errno = EINVAL;
48 return (-1);
49 }
50 if (times == NULL || (times[0].tv_nsec == UTIME_NOW &&
51 times[1].tv_nsec == UTIME_NOW))
52 tvp = NULL;
53 else if (times[0].tv_nsec == UTIME_OMIT &&
54 times[1].tv_nsec == UTIME_OMIT)
55 return (0);
56 else {
57 if ((times[0].tv_nsec < 0 || times[0].tv_nsec > 999999999) &&
58 times[0].tv_nsec != UTIME_NOW &&
59 times[0].tv_nsec != UTIME_OMIT) {
60 errno = EINVAL;
61 return (-1);
62 }
63 if ((times[1].tv_nsec < 0 || times[1].tv_nsec > 999999999) &&
64 times[1].tv_nsec != UTIME_NOW &&
65 times[1].tv_nsec != UTIME_OMIT) {
66 errno = EINVAL;
67 return (-1);
68 }
69 tv[0].tv_sec = times[0].tv_sec;
70 tv[0].tv_usec = times[0].tv_nsec / 1000;
71 tv[1].tv_sec = times[1].tv_sec;
72 tv[1].tv_usec = times[1].tv_nsec / 1000;
73 tvp = tv;
74 if (times[0].tv_nsec == UTIME_OMIT ||
75 times[1].tv_nsec == UTIME_OMIT) {
76 if (fstatat(fd, path, &sb, flag) == -1)
77 return (-1);
78 if (times[0].tv_nsec == UTIME_OMIT) {
79 tv[0].tv_sec = sb.st_atim.tv_sec;
80 tv[0].tv_usec = sb.st_atim.tv_nsec / 1000;
81 }
82 if (times[1].tv_nsec == UTIME_OMIT) {
83 tv[1].tv_sec = sb.st_mtim.tv_sec;
84 tv[1].tv_usec = sb.st_mtim.tv_nsec / 1000;
85 }
86 }
87 if (times[0].tv_nsec == UTIME_NOW ||
88 times[1].tv_nsec == UTIME_NOW) {
89 if (gettimeofday(&now, NULL) == -1)
90 return (-1);
91 if (times[0].tv_nsec == UTIME_NOW)
92 tv[0] = now;
93 if (times[1].tv_nsec == UTIME_NOW)
94 tv[1] = now;
95 }
96 }
97 if ((flag & AT_SYMLINK_NOFOLLOW) == 0)
98 return (futimesat(fd, path, tvp));
99 else if ((flag & AT_SYMLINK_NOFOLLOW) != 0 &&
100 (fd == AT_FDCWD || path[0] == '/'))
101 return (lutimes(path, tvp));
102 else {
103 errno = ENOTSUP;
104 return (-1);
105 }
106 }
107