/* Copyright (C) 2002 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Roland McGrath <roland@redhat.com>, 2002. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ #include <errno.h> #include <pthread.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <sys/wait.h> static pid_t initial_pid; static void * tf (void *arg) { if (getppid () != initial_pid) { printf ("getppid in thread returned %ld, expected %ld\n", (long int) getppid (), (long int) initial_pid); return (void *) -1; } return NULL; } int main (void) { initial_pid = getpid (); pid_t child = fork (); if (child == 0) { if (getppid () != initial_pid) { printf ("first getppid returned %ld, expected %ld\n", (long int) getppid (), (long int) initial_pid); exit (1); } pthread_t th; if (pthread_create (&th, NULL, tf, NULL) != 0) { puts ("pthread_create failed"); exit (1); } void *result; if (pthread_join (th, &result) != 0) { puts ("pthread_join failed"); exit (1); } exit (result == NULL ? 0 : 1); } else if (child == -1) { puts ("initial fork failed"); return 1; } int status; if (TEMP_FAILURE_RETRY (waitpid (child, &status, 0)) != child) { printf ("waitpid failed: %m\n"); return 1; } return status; }