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glibc/nptl/tst-fork3.c
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/* Copyright (C) 2002-2016 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 * | |
tf2 (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; | |
} | |
static void * | |
tf1 (void *arg) | |
{ | |
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 th2; | |
if (pthread_create (&th2, NULL, tf2, NULL) != 0) | |
{ | |
puts ("child: pthread_create failed"); | |
exit (1); | |
} | |
void *result; | |
if (pthread_join (th2, &result) != 0) | |
{ | |
puts ("pthread_join failed"); | |
exit (1); | |
} | |
exit (result == NULL ? 0 : 1); | |
} | |
else if (child == -1) | |
{ | |
puts ("initial fork failed"); | |
exit (1); | |
} | |
int status; | |
if (TEMP_FAILURE_RETRY (waitpid (child, &status, 0)) != child) | |
{ | |
printf ("waitpid failed: %m\n"); | |
exit (1); | |
} | |
exit (status); | |
} | |
int | |
main (void) | |
{ | |
initial_pid = getpid (); | |
pthread_t th1; | |
if (pthread_create (&th1, NULL, tf1, NULL) != 0) | |
{ | |
puts ("parent: pthread_create failed"); | |
exit (1); | |
} | |
/* This call should never return. */ | |
pthread_join (th1, NULL); | |
return 1; | |
} |