1/*
2 * This file is part of attach-p-cmd strace test.
3 *
4 * Copyright (c) 2016-2017 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 <stdio.h>
33#include <sys/stat.h>
34#include <unistd.h>
35#include "attach-p-cmd.h"
36
37static void
38write_pidfile(const pid_t pid)
39{
40	FILE *fp = fopen(pidfile, "w");
41	if (!fp)
42		perror_msg_and_fail("fopen: %s", pidfile);
43
44	if (fprintf(fp, "%d", pid) < 0)
45		perror_msg_and_fail("fprintf: %s", pidfile);
46
47	if (fclose(fp))
48		perror_msg_and_fail("fclose: %s", pidfile);
49}
50
51static void
52wait_for_peer_invocation(void)
53{
54	/* wait for the lock directory to be created by peer */
55	while (rmdir(lockdir)) {
56		if (ENOENT != errno)
57			perror_msg_and_fail("rmdir: %s", lockdir);
58	}
59}
60
61int
62main(void)
63{
64	const pid_t pid = getpid();
65	write_pidfile(pid);
66
67	wait_for_peer_invocation();
68
69	static const char dir[] = "attach-p-cmd.test cmd";
70	int rc = chdir(dir);
71
72	printf("%-5d chdir(\"%s\") = %s\n"
73	       "%-5d +++ exited with 0 +++\n",
74	       pid, dir, sprintrc(rc), pid);
75
76	return 0;
77}
78