89 lines
1.9 KiB
C
89 lines
1.9 KiB
C
|
/* Copyright (C) 2002-2022 Free Software Foundation, Inc.
|
||
|
|
This file is part of the GNU C Library.
|
||
|
|
|
||
|
|
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
|
||
|
|
<https://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;
|
||
|
|
}
|