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
37 static void
write_pidfile(const pid_t pid)38 write_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
51 static void
wait_for_peer_invocation(void)52 wait_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
61 int
main(void)62 main(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