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89 lines
1.9 KiB
C
89 lines
1.9 KiB
C
/* Copyright (C) 2002-2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/wait.h>
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static pid_t initial_pid;
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static void *
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tf (void *arg)
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{
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if (getppid () != initial_pid)
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{
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printf ("getppid in thread returned %ld, expected %ld\n",
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(long int) getppid (), (long int) initial_pid);
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return (void *) -1;
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}
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return NULL;
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}
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int
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main (void)
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{
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initial_pid = getpid ();
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pid_t child = fork ();
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if (child == 0)
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{
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if (getppid () != initial_pid)
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{
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printf ("first getppid returned %ld, expected %ld\n",
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(long int) getppid (), (long int) initial_pid);
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exit (1);
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}
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pthread_t th;
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if (pthread_create (&th, NULL, tf, NULL) != 0)
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{
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puts ("pthread_create failed");
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exit (1);
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}
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void *result;
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if (pthread_join (th, &result) != 0)
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{
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puts ("pthread_join failed");
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exit (1);
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}
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exit (result == NULL ? 0 : 1);
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}
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else if (child == -1)
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{
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puts ("initial fork failed");
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return 1;
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}
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int status;
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if (TEMP_FAILURE_RETRY (waitpid (child, &status, 0)) != child)
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{
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printf ("waitpid failed: %m\n");
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return 1;
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}
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return status;
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}
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