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 <signal.h>
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include <sys/stat.h>
36 #include <time.h>
37 #include <unistd.h>
38 #include "attach-p-cmd.h"
39
40 static void
wait_for_peer_invocation(void)41 wait_for_peer_invocation(void)
42 {
43 /* create the lock directory */
44 if (mkdir(lockdir, 0700))
45 perror_msg_and_fail("mkdir: %s", lockdir);
46
47 /* wait for the lock directory to be removed by peer */
48 while (mkdir(lockdir, 0700)) {
49 if (EEXIST != errno)
50 perror_msg_and_fail("mkdir: %s", lockdir);
51 }
52
53 /* cleanup the lock directory */
54 if (rmdir(lockdir))
55 perror_msg_and_fail("rmdir: %s", lockdir);
56 }
57
58 static void
wait_for_peer_termination(void)59 wait_for_peer_termination(void)
60 {
61 FILE *fp = fopen(pidfile, "r");
62 if (!fp)
63 perror_msg_and_fail("fopen: %s", pidfile);
64
65 pid_t pid;
66 if (fscanf(fp, "%d", &pid) < 0)
67 perror_msg_and_fail("fscanf: %s", pidfile);
68 if (pid < 0)
69 error_msg_and_fail("pid = %d", pid);
70
71 if (fclose(fp))
72 perror_msg_and_fail("fclose: %s", pidfile);
73
74 if (unlink(pidfile))
75 perror_msg_and_fail("unlink: %s", pidfile);
76
77 while (kill(pid, 0) == 0)
78 ;
79 }
80
81 int
main(void)82 main(void)
83 {
84 wait_for_peer_invocation();
85 wait_for_peer_termination();
86
87 static const struct timespec ts = { .tv_nsec = 123456789 };
88 if (nanosleep(&ts, NULL))
89 perror_msg_and_fail("nanosleep");
90
91 static const char dir[] = "attach-p-cmd.test -p";
92 pid_t pid = getpid();
93 int rc = chdir(dir);
94
95 printf("%-5d chdir(\"%s\") = %s\n"
96 "%-5d +++ exited with 0 +++\n",
97 pid, dir, sprintrc(rc), pid);
98
99 return 0;
100 }
101