1/* Copyright (C) 2002-2024 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <errno.h>
19#include <pthread.h>
20#include <stdio.h>
21#include <stdlib.h>
22#include <unistd.h>
23#include <sys/wait.h>
24
25
26static pid_t initial_pid;
27
28
29static void *
30tf2 (void *arg)
31{
32 if (getppid () != initial_pid)
33 {
34 printf (format: "getppid in thread returned %ld, expected %ld\n",
35 (long int) getppid (), (long int) initial_pid);
36 return (void *) -1;
37 }
38
39 return NULL;
40}
41
42
43static void *
44tf1 (void *arg)
45{
46 pid_t child = fork ();
47 if (child == 0)
48 {
49 if (getppid () != initial_pid)
50 {
51 printf (format: "first getppid returned %ld, expected %ld\n",
52 (long int) getppid (), (long int) initial_pid);
53 exit (1);
54 }
55
56 pthread_t th2;
57 if (pthread_create (newthread: &th2, NULL, start_routine: tf2, NULL) != 0)
58 {
59 puts (s: "child: pthread_create failed");
60 exit (1);
61 }
62
63 void *result;
64 if (pthread_join (th: th2, thread_return: &result) != 0)
65 {
66 puts (s: "pthread_join failed");
67 exit (1);
68 }
69
70 exit (result == NULL ? 0 : 1);
71 }
72 else if (child == -1)
73 {
74 puts (s: "initial fork failed");
75 exit (1);
76 }
77
78 int status;
79 if (TEMP_FAILURE_RETRY (waitpid (child, &status, 0)) != child)
80 {
81 printf (format: "waitpid failed: %m\n");
82 exit (1);
83 }
84
85 exit (status);
86}
87
88
89static int
90do_test (void)
91{
92 initial_pid = getpid ();
93
94 pthread_t th1;
95 if (pthread_create (newthread: &th1, NULL, start_routine: tf1, NULL) != 0)
96 {
97 puts (s: "parent: pthread_create failed");
98 exit (1);
99 }
100
101 /* This call should never return. */
102 pthread_join (th: th1, NULL);
103
104 return 1;
105}
106
107#include <support/test-driver.c>
108

source code of glibc/sysdeps/pthread/tst-fork3.c