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/* $OpenBSD: fork.c,v 1.2 2001/09/20 16:43:15 todd Exp $ */
/*
* Copyright (c) 1993, 1994, 1995, 1996 by Chris Provenzano and contributors,
* proven@mit.edu All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Chris Provenzano,
* the University of California, Berkeley, and contributors.
* 4. Neither the name of Chris Provenzano, the University, nor the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL CHRIS PROVENZANO, THE REGENTS OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* 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 <stdlib.h>
#include <signal.h>
#include <sys/wait.h>
#include "test.h"
void *
empty(void *arg)
{
return (void *)0x12345678;
}
void *
sleeper(void *arg)
{
pthread_set_name_np(pthread_self(), "slpr");
sleep(10);
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))) {
/* This fails when stdout is /dev/null!? */
/*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 */
printf("sleeper should have disappeared\n");
ASSERT(ESRCH == pthread_join(sleeper_thread, &result));
printf("sleeper disappeared correctly\n");
/* Test starting another thread */
CHECKr(pthread_create(&sleeper_thread, NULL, empty, NULL));
sleep(1);
CHECKr(pthread_join(sleeper_thread, &result));
ASSERT(result == (void *)0x12345678);
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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