1/* Simple exec test, only a thread in the parent.
2 Copyright (C) 2002-2024 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <paths.h>
21#include <pthread.h>
22#include <signal.h>
23#include <spawn.h>
24#include <stdbool.h>
25#include <stdio.h>
26#include <stdlib.h>
27#include <unistd.h>
28#include <sys/wait.h>
29#include <support/xsignal.h>
30
31
32static void *
33tf (void *arg)
34{
35 pthread_t th = (pthread_t) arg;
36
37 if (pthread_join (th: th, NULL) == 0)
38 {
39 puts (s: "thread in parent joined!?");
40 exit (1);
41 }
42
43 puts (s: "join in thread in parent returned!?");
44 exit (1);
45}
46
47
48static int
49do_test (void)
50{
51 int fd[2];
52 if (pipe (pipedes: fd) != 0)
53 {
54 puts (s: "pipe failed");
55 exit (1);
56 }
57
58 /* Not interested in knowing when the pipe is closed. */
59 xsignal (SIGPIPE, SIG_IGN);
60
61 posix_spawn_file_actions_t a;
62 if (posix_spawn_file_actions_init (file_actions: &a) != 0)
63 {
64 puts (s: "spawn_file_actions_init failed");
65 exit (1);
66 }
67
68 if (posix_spawn_file_actions_adddup2 (file_actions: &a, fd: fd[1], STDOUT_FILENO) != 0)
69 {
70 puts (s: "spawn_file_actions_adddup2 failed");
71 exit (1);
72 }
73
74 if (posix_spawn_file_actions_addclose (file_actions: &a, fd: fd[0]) != 0)
75 {
76 puts (s: "spawn_file_actions_addclose");
77 exit (1);
78 }
79
80 pthread_t th;
81 if (pthread_create (newthread: &th, NULL, start_routine: tf, arg: (void *) pthread_self ()) != 0)
82 {
83 puts (s: "create failed");
84 exit (1);
85 }
86
87 pid_t pid;
88 char *argv[] = { (char *) _PATH_BSHELL, (char *) "-c", (char *) "echo $$",
89 NULL };
90 if (posix_spawn (pid: &pid, _PATH_BSHELL, file_actions: &a, NULL, argv: argv, NULL) != 0)
91 {
92 puts (s: "spawn failed");
93 exit (1);
94 }
95
96 close (fd: fd[1]);
97
98 char buf[200];
99 ssize_t n;
100 bool seen_pid = false;
101 while (TEMP_FAILURE_RETRY ((n = read (fd[0], buf, sizeof (buf)))) > 0)
102 {
103 /* We only expect to read the PID. */
104 char *endp;
105 long int rpid = strtol (buf, &endp, 10);
106
107 if (*endp != '\n')
108 {
109 printf (format: "didn't parse whole line: \"%s\"\n", buf);
110 exit (1);
111 }
112 if (endp == buf)
113 {
114 puts (s: "read empty line");
115 exit (1);
116 }
117
118 if (rpid != pid)
119 {
120 printf (format: "found \"%s\", expected PID %ld\n", buf, (long int) pid);
121 exit (1);
122 }
123
124 if (seen_pid)
125 {
126 puts (s: "found more than one PID line");
127 exit (1);
128 }
129
130 seen_pid = true;
131 }
132
133 close (fd: fd[0]);
134
135 int status;
136 int err = waitpid (pid: pid, stat_loc: &status, options: 0);
137 if (err != pid)
138 {
139 puts (s: "waitpid failed");
140 exit (1);
141 }
142
143 if (!seen_pid)
144 {
145 puts (s: "didn't get PID");
146 exit (1);
147 }
148
149 puts (s: "read correct PID");
150
151 return 0;
152}
153
154#define TEST_FUNCTION do_test ()
155#include "../test-skeleton.c"
156

source code of glibc/sysdeps/pthread/tst-exec1.c