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 | |
26 | static pid_t initial_pid; |
27 | |
28 | |
29 | static void * |
30 | tf (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 | |
43 | int |
44 | main (void) |
45 | { |
46 | initial_pid = getpid (); |
47 | |
48 | pid_t child = fork (); |
49 | if (child == 0) |
50 | { |
51 | if (getppid () != initial_pid) |
52 | { |
53 | printf (format: "first getppid returned %ld, expected %ld\n" , |
54 | (long int) getppid (), (long int) initial_pid); |
55 | exit (1); |
56 | } |
57 | |
58 | pthread_t th; |
59 | if (pthread_create (newthread: &th, NULL, start_routine: tf, NULL) != 0) |
60 | { |
61 | puts (s: "pthread_create failed" ); |
62 | exit (1); |
63 | } |
64 | |
65 | void *result; |
66 | if (pthread_join (th: th, thread_return: &result) != 0) |
67 | { |
68 | puts (s: "pthread_join failed" ); |
69 | exit (1); |
70 | } |
71 | |
72 | exit (result == NULL ? 0 : 1); |
73 | } |
74 | else if (child == -1) |
75 | { |
76 | puts (s: "initial fork failed" ); |
77 | return 1; |
78 | } |
79 | |
80 | int status; |
81 | if (TEMP_FAILURE_RETRY (waitpid (child, &status, 0)) != child) |
82 | { |
83 | printf (format: "waitpid failed: %m\n" ); |
84 | return 1; |
85 | } |
86 | |
87 | return status; |
88 | } |
89 | |