/* $OpenBSD: test_fork.c,v 1.8 2000/10/04 05:50:58 d Exp $ */ /* * Copyright (c) 1994 by Chris Provenzano, proven@athena.mit.edu * * Test the fork system call. */ #include #include #include #include #include #include #include #include #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))) { /* 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 */ 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; }