77 lines
1.3 KiB
C
77 lines
1.3 KiB
C
/* $NetBSD: fork.c,v 1.3 2003/07/26 19:38:48 salo Exp $ */
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/*
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* Check that child process doesn't get threads, also make sure sleep
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* works in child.
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*
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* Written by Love Hörnquist Åstrand <lha@NetBSD.org>, March 2003.
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* Public domain.
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*/
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <signal.h>
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#include <pthread.h>
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#include <unistd.h>
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static pid_t parent;
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static int thread_survived = 0;
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static void *
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print_pid(void *arg)
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{
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sleep(3);
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thread_survived = 1;
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if (parent != getpid()) {
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kill(parent, SIGKILL);
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errx(1, "child thread running");
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}
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return NULL;
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}
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int
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main(int argc, char **argv)
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{
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pthread_t p;
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pid_t fork_pid;
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int ret;
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parent = getpid();
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pthread_create(&p, NULL, print_pid, NULL);
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fork_pid = fork();
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if (fork_pid == -1)
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err(1, "fork failed");
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if (fork_pid) {
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ret = pthread_join(p, NULL);
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if (ret && fork_pid != 0)
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errx(1, "join failed in parent");
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if (!thread_survived)
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errx(1, "child_thread did NOT survive");
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if (fork_pid != 0) {
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int status;
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waitpid(fork_pid, &status, 0);
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if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
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errx(1, "child died wrongly");
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}
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} else {
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sleep(5);
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if (thread_survived) {
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kill(parent, SIGKILL);
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errx(1, "child_thread survived");
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}
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}
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return 0;
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}
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