t_mtime_otrunc.c revision 314817 
1/*-
2 * Copyright (c) 2017 The NetBSD Foundation, Inc.
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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
15 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
16 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
18 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
20 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
21 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
22 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
23 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24 * POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__COPYRIGHT("@(#) Copyright (c) 2013\
29 The NetBSD Foundation, inc. All rights reserved.");
30__RCSID("$NetBSD: t_mtime_otrunc.c,v 1.1 2017/02/02 22:07:05 martin Exp $");
31
32#include <errno.h>
33#include <unistd.h>
34#include <stdio.h>
35#include <stdlib.h>
36#include <sys/stat.h>
37#include <atf-c.h>
38
39#include <rump/rump_syscalls.h>
40#include <rump/rump.h>
41
42#include "../common/h_fsmacros.h"
43
44#define LOCKFILE	"lock"
45
46static time_t
47lock_it(void)
48{
49	struct stat st;
50
51	if (rump_sys_stat(LOCKFILE, &st) != 0)
52		st.st_mtime = 0;
53
54	int f = rump_sys_open(LOCKFILE, O_WRONLY|O_CREAT|O_TRUNC, 0666);
55	if (f == -1) return 0;
56	rump_sys_close(f);
57
58	return st.st_mtime;
59}
60
61static void
62otrunc_mtime_update(const atf_tc_t *tc, const char *path)
63{
64	time_t last_ts = 0;
65	int res;
66
67	/* atf_tc_expect_fail("PR kern/51762"); */
68
69	res = rump_sys_chdir(path);
70	if (res == -1)
71		atf_tc_fail("chdir failed");
72
73	for (int i = 0; i < 5; i++) {
74		time_t l = lock_it();
75		printf("last lock: %ld\n", (long)l);
76		ATF_REQUIRE_MSG(i == 0 || l > last_ts,
77		    "iteration %d: lock time did not increase, old time %lu, "
78		    "new time %lu", i,
79		    (unsigned long)last_ts, (unsigned long)l);
80		last_ts = l;
81		sleep(2);
82	}
83	rump_sys_chdir("/");
84}
85
86ATF_FSAPPLY(otrunc_mtime_update, "Checks for mtime updates by open(O_TRUNC) (PR kern/51762)");
87