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__FBSDID("$FreeBSD$");
29
30#include "namespace.h"
31#include <sys/stat.h>
32
33#include <errno.h>
34#include <fcntl.h>
35#include <time.h>
36#include "un-namespace.h"
37
38#include "libc_private.h"
39
40int
41utimensat(int fd, const char *path, const struct timespec times[2], int flag)
42{
43	struct timeval now, tv[2], *tvp;
44	struct stat sb;
45	int osreldate;
46
47	osreldate = __getosreldate();
48	if (osreldate >= 1100056 ||
49	    (osreldate >= 1002506 && osreldate < 1100000))
50		return (__sys_utimensat(fd, path, times, flag));
51
52	if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0) {
53		errno = EINVAL;
54		return (-1);
55	}
56	if (times == NULL || (times[0].tv_nsec == UTIME_NOW &&
57	    times[1].tv_nsec == UTIME_NOW))
58		tvp = NULL;
59	else if (times[0].tv_nsec == UTIME_OMIT &&
60	    times[1].tv_nsec == UTIME_OMIT)
61		return (0);
62	else {
63		if ((times[0].tv_nsec < 0 || times[0].tv_nsec > 999999999) &&
64		    times[0].tv_nsec != UTIME_NOW &&
65		    times[0].tv_nsec != UTIME_OMIT) {
66			errno = EINVAL;
67			return (-1);
68		}
69		if ((times[1].tv_nsec < 0 || times[1].tv_nsec > 999999999) &&
70		    times[1].tv_nsec != UTIME_NOW &&
71		    times[1].tv_nsec != UTIME_OMIT) {
72			errno = EINVAL;
73			return (-1);
74		}
75		tv[0].tv_sec = times[0].tv_sec;
76		tv[0].tv_usec = times[0].tv_nsec / 1000;
77		tv[1].tv_sec = times[1].tv_sec;
78		tv[1].tv_usec = times[1].tv_nsec / 1000;
79		tvp = tv;
80		if (times[0].tv_nsec == UTIME_OMIT ||
81		    times[1].tv_nsec == UTIME_OMIT) {
82			if (fstatat(fd, path, &sb, flag) == -1)
83				return (-1);
84			if (times[0].tv_nsec == UTIME_OMIT) {
85				tv[0].tv_sec = sb.st_atim.tv_sec;
86				tv[0].tv_usec = sb.st_atim.tv_nsec / 1000;
87			}
88			if (times[1].tv_nsec == UTIME_OMIT) {
89				tv[1].tv_sec = sb.st_mtim.tv_sec;
90				tv[1].tv_usec = sb.st_mtim.tv_nsec / 1000;
91			}
92		}
93		if (times[0].tv_nsec == UTIME_NOW ||
94		    times[1].tv_nsec == UTIME_NOW) {
95			if (gettimeofday(&now, NULL) == -1)
96				return (-1);
97			if (times[0].tv_nsec == UTIME_NOW)
98				tv[0] = now;
99			if (times[1].tv_nsec == UTIME_NOW)
100				tv[1] = now;
101		}
102	}
103	if ((flag & AT_SYMLINK_NOFOLLOW) == 0)
104		return (futimesat(fd, path, tvp));
105	else if ((flag & AT_SYMLINK_NOFOLLOW) != 0 &&
106	    (fd == AT_FDCWD || path[0] == '/'))
107		return (lutimes(path, tvp));
108	else {
109		errno = ENOTSUP;
110		return (-1);
111	}
112}
113