1/*
2 * This file is part of attach-p-cmd strace test.
3 *
4 * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 *    derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#include "tests.h"
31#include <errno.h>
32#include <signal.h>
33#include <stdio.h>
34#include <stdlib.h>
35#include <sys/stat.h>
36#include <unistd.h>
37
38static void
39handler(int signo)
40{
41}
42
43int
44main(void)
45{
46	const struct sigaction act = { .sa_handler = handler };
47	if (sigaction(SIGALRM, &act, NULL))
48		perror_msg_and_fail("sigaction");
49
50	sigset_t mask = {};
51	sigaddset(&mask, SIGALRM);
52	if (sigprocmask(SIG_UNBLOCK, &mask, NULL))
53		perror_msg_and_fail("sigprocmask");
54
55	static const char lockdir[] = "attach-p-cmd.test-lock";
56	/* create a lock directory */
57	if (mkdir(lockdir, 0700))
58		perror_msg_and_fail("mkdir: %s", lockdir);
59
60	/* wait for the lock directory to be removed by peer */
61	while (mkdir(lockdir, 0700)) {
62		if (EEXIST != errno)
63			perror_msg_and_fail("mkdir: %s", lockdir);
64	}
65
66	/* remove the lock directory */
67	if (rmdir(lockdir))
68		perror_msg_and_fail("rmdir: %s", lockdir);
69
70	alarm(1);
71	pause();
72
73	static const char dir[] = "attach-p-cmd.test -p";
74	pid_t pid = getpid();
75	int rc = chdir(dir);
76
77	printf("%-5d --- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL} ---\n"
78	       "%-5d chdir(\"%s\") = %d %s (%m)\n"
79	       "%-5d +++ exited with 0 +++\n",
80	       pid, pid, dir, rc, errno2name(), pid);
81
82	return 0;
83}
84