2 * Copyright (c) 2008 Ganbold Tsagaankhuu
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer
10 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
40 #define NUM_THREADS 100
43 vfork_test(void *threadid)
52 err(1, "Failed to vfork");
58 * This program invokes multiple threads and each thread calls
59 * vfork() system call.
64 pthread_t threads[NUM_THREADS];
65 struct sigaction reapchildren;
68 memset(&reapchildren, 0, sizeof(reapchildren));
69 reapchildren.sa_handler = SIG_IGN;
71 /* Automatically reap zombies. */
72 if (sigaction(SIGCHLD, &reapchildren, NULL) == -1)
73 err(1, "Could not sigaction(SIGCHLD)");
75 for (t = 0; t < NUM_THREADS; t++) {
76 rc = pthread_create(&threads[t], NULL, vfork_test, (void *)t);
78 errc(1, rc, "pthread_create");