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 int val;
27
28
29static void
30prepare1 (void)
31{
32 val *= 2;
33}
34
35static void
36prepare2 (void)
37{
38 ++val;
39}
40
41static void
42parent1 (void)
43{
44 val += 4;
45}
46
47static void
48parent2 (void)
49{
50 val *= 4;
51}
52
53static void
54child1 (void)
55{
56 val += 8;
57}
58
59static void
60child2 (void)
61{
62 val *= 8;
63}
64
65
66static int
67do_test (void)
68{
69 pid_t pid;
70 int status = 0;
71
72 if (pthread_atfork (prepare: prepare1, parent: parent1, child: child1) != 0)
73 {
74 puts (s: "1st atfork failed");
75 exit (1);
76 }
77 if (pthread_atfork (prepare: prepare2, parent: parent2, child: child2) != 0)
78 {
79 puts (s: "2nd atfork failed");
80 exit (1);
81 }
82
83 pid = fork ();
84 if (pid == -1)
85 {
86 puts (s: "fork failed");
87 exit (1);
88 }
89
90 if (pid != 0)
91 {
92 /* Parent. */
93 if (val != 24)
94 {
95 printf (format: "expected val=%d, got %d\n", 24, val);
96 exit (1);
97 }
98
99 if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
100 {
101 puts (s: "waitpid failed");
102 exit (1);
103 }
104 }
105 else
106 {
107 /* Child. */
108 if (val != 80)
109 {
110 printf (format: "expected val=%d, got %d\n", 80, val);
111 exit (2);
112 }
113 }
114
115 return status;
116}
117
118#define TEST_FUNCTION do_test ()
119#include "../test-skeleton.c"
120

source code of glibc/sysdeps/pthread/tst-atfork1.c