1/*
2 * Copyright (c) 2019 Darren Tucker
3 *
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17#include "includes.h"
18
19#include <sys/types.h>
20#include <sys/stat.h>
21
22#include <errno.h>
23#include <fcntl.h>
24#include <stdio.h>
25#include <stdlib.h>
26#include <string.h>
27#include <unistd.h>
28
29#define TMPFILE "utimensat.tmp"
30#define TMPFILE2 "utimensat.tmp2"
31
32#ifndef AT_SYMLINK_NOFOLLOW
33# define AT_SYMLINK_NOFOLLOW 0x80000000
34#endif
35
36int utimensat(int, const char *, const struct timespec[2], int);
37
38static void
39cleanup(void)
40{
41	(void)unlink(TMPFILE);
42	(void)unlink(TMPFILE2);
43}
44
45static void
46fail(char *msg, long expect, long got)
47{
48	int saved_errno = errno;
49
50	if (expect == got && got == 0)
51		fprintf(stderr, "utimensat: %s: %s\n", msg,
52		     strerror(saved_errno));
53	else
54		fprintf(stderr, "utimensat: %s: expected %ld got %ld\n",
55		     msg, expect, got);
56	cleanup();
57	exit(1);
58}
59
60int
61main(void)
62{
63	int fd;
64	struct stat sb;
65	struct timespec ts[2];
66
67	cleanup();
68	if ((fd = open(TMPFILE, O_CREAT, 0600)) == -1)
69		fail("open", 0, 0);
70	close(fd);
71
72	ts[0].tv_sec = 12345678;
73	ts[0].tv_nsec = 23456789;
74	ts[1].tv_sec = 34567890;
75	ts[1].tv_nsec = 45678901;
76	if (utimensat(AT_FDCWD, TMPFILE, ts, AT_SYMLINK_NOFOLLOW) == -1)
77		fail("utimensat", 0, 0);
78
79	if (stat(TMPFILE, &sb) == -1)
80		fail("stat", 0, 0 );
81	if (sb.st_atime != 12345678)
82		fail("st_atime", 0, 0 );
83	if (sb.st_mtime != 34567890)
84		fail("st_mtime", 0, 0 );
85#if 0
86	/*
87	 * Results expected to be rounded to the nearest microsecond.
88	 * Depends on timestamp precision in kernel and filesystem so
89	 * disabled by default.
90	 */
91	if (sb.st_atim.tv_nsec != 23456000)
92		fail("atim.tv_nsec", 23456000, sb.st_atim.tv_nsec);
93	if (sb.st_mtim.tv_nsec != 45678000)
94		fail("mtim.tv_nsec", 45678000, sb.st_mtim.tv_nsec);
95#endif
96
97	/*
98	 * POSIX specifies that when given a symlink, AT_SYMLINK_NOFOLLOW
99	 * should update the symlink and not the destination.  The compat
100	 * code doesn't have a way to do this, so where possible it fails
101	 * with instead of following a symlink when explicitly asked not to.
102	 * Here we just test that it does not update the destination.
103	 */
104	if (rename(TMPFILE, TMPFILE2) == -1)
105		fail("rename", 0, 0);
106	if (symlink(TMPFILE2, TMPFILE) == -1)
107		fail("symlink", 0, 0);
108	ts[0].tv_sec = 11223344;
109	ts[1].tv_sec = 55667788;
110	(void)utimensat(AT_FDCWD, TMPFILE, ts, AT_SYMLINK_NOFOLLOW);
111	if (stat(TMPFILE2, &sb) == -1)
112		fail("stat", 0, 0 );
113	if (sb.st_atime == 11223344)
114		fail("utimensat symlink st_atime", 0, 0 );
115	if (sb.st_mtime == 55667788)
116		fail("utimensat symlink st_mtime", 0, 0 );
117
118	cleanup();
119	exit(0);
120}
121