1 /*
2 * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
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 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "tests.h"
29 #include <assert.h>
30 #include <stdlib.h>
31 #include <unistd.h>
32 #include <pthread.h>
33 #include <sys/wait.h>
34
35 #define P 16
36 #define T 7
37
38 static void *
thread(void * arg)39 thread(void *arg)
40 {
41 assert(write(1, "", 1) == 1);
42 pause();
43 return arg;
44 }
45
46 static int
process(void)47 process(void)
48 {
49 int i;
50 int fds[2];
51 pthread_t t;
52 struct timespec ts = { .tv_nsec = 10000000 };
53
54 (void) close(0);
55 (void) close(1);
56 if (pipe(fds))
57 perror_msg_and_fail("pipe");
58
59 for (i = 0; i < T; ++i)
60 assert(pthread_create(&t, NULL, thread, NULL) == 0);
61 for (i = 0; i < T; ++i)
62 assert(read(0, fds, 1) == 1);
63
64 (void) nanosleep(&ts, 0);
65 return 0;
66 }
67
68 int
main(void)69 main(void)
70 {
71 int i, s;
72 pid_t p;
73
74 for (i = 0; i < P; ++i) {
75 p = fork();
76 if (p < 0)
77 perror_msg_and_fail("fork");
78 if (p == 0)
79 return process();
80 assert(waitpid(p, &s, 0) == p);
81 assert(WIFEXITED(s));
82 if (WEXITSTATUS(s))
83 return WEXITSTATUS(s);
84 }
85 return 0;
86 }
87