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/* $OpenBSD: test_fork.c,v 1.7 2000/01/06 06:54:28 d Exp $ */
/*
* Copyright (c) 1994 by Chris Provenzano, proven@athena.mit.edu
*
* Test the fork system call.
*/
#include <pthread.h>
#include <pthread_np.h>
#include <stdio.h>
#include <fcntl.h>
#include <sys/types.h>
#include <unistd.h>
#include <signal.h>
#include <sys/wait.h>
#include "test.h"
void *
sleeper(void *arg)
{
pthread_set_name_np(pthread_self(), "slpr");
sleep(4);
PANIC("sleeper timed out");
}
int
main()
{
int flags;
pthread_t sleeper_thread;
void *result;
int status;
pid_t parent_pid;
pid_t child_pid;
parent_pid = getpid();
CHECKe(flags = fcntl(STDOUT_FILENO, F_GETFL));
if ((flags & (O_NONBLOCK | O_NDELAY))) {
CHECKe(fcntl(STDOUT_FILENO, F_SETFL,
flags & ~(O_NONBLOCK | O_NDELAY)));
}
CHECKr(pthread_create(&sleeper_thread, NULL, sleeper, NULL));
sleep(1);
printf("forking from pid %d\n", getpid());
CHECKe(child_pid = fork());
if (child_pid == 0) {
/* child: */
printf("child = pid %d\n", getpid());
/* Our pid should change */
ASSERT(getpid() != parent_pid);
/* Our sleeper thread should have disappeared */
ASSERT(ESRCH == pthread_join(sleeper_thread, &result));
printf("child ok\n");
_exit(0);
PANIC("child _exit");
}
/* parent: */
printf("parent = pid %d\n", getpid());
/* Our pid should stay the same */
ASSERT(getpid() == parent_pid);
/* wait for the child */
ASSERTe(wait(&status), == child_pid);
/* the child should have called exit(0) */
ASSERT(WIFEXITED(status));
ASSERT(WEXITSTATUS(status) == 0);
/* Our sleeper thread should still be around */
CHECKr(pthread_detach(sleeper_thread));
printf("parent ok\n");
SUCCEED;
}
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