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1/* Thread calls exec.
2 Copyright (C) 2002-2019 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
19
20#include <errno.h>
21#include <paths.h>
22#include <pthread.h>
23#include <signal.h>
24#include <spawn.h>
25#include <stdbool.h>
26#include <stdio.h>
27#include <stdlib.h>
28#include <unistd.h>
29#include <sys/wait.h>
30
31
32static void *
33tf (void *arg)
34{
35 execl (_PATH_BSHELL, _PATH_BSHELL, "-c", "echo $$", NULL);
36
37 puts ("execl failed");
38 exit (1);
39}
40
41
42static int
43do_test (void)
44{
45 int fd[2];
46 if (pipe (fd) != 0)
47 {
48 puts ("pipe failed");
49 exit (1);
50 }
51
52 /* Not interested in knowing when the pipe is closed. */
53 if (sigignore (SIGPIPE) != 0)
54 {
55 puts ("sigignore failed");
56 exit (1);
57 }
58
59 pid_t pid = fork ();
60 if (pid == -1)
61 {
62 puts ("fork failed");
63 exit (1);
64 }
65
66 if (pid == 0)
67 {
68 /* Use the fd for stdout. This is kind of ugly because it
69 substitutes the fd of stdout but we know what we are doing
70 here... */
71 if (dup2 (fd[1], STDOUT_FILENO) != STDOUT_FILENO)
72 {
73 puts ("dup2 failed");
74 exit (1);
75 }
76
77 close (fd[0]);
78
79 pthread_t th;
80 if (pthread_create (&th, NULL, tf, NULL) != 0)
81 {
82 puts ("create failed");
83 exit (1);
84 }
85
86 if (pthread_join (th, NULL) == 0)
87 {
88 puts ("join succeeded!?");
89 exit (1);
90 }
91
92 puts ("join returned!?");
93 exit (1);
94 }
95
96 close (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 ("didn't parse whole line: \"%s\"\n", buf);
110 exit (1);
111 }
112 if (endp == buf)
113 {
114 puts ("read empty line");
115 exit (1);
116 }
117
118 if (rpid != pid)
119 {
120 printf ("found \"%s\", expected PID %ld\n", buf, (long int) pid);
121 exit (1);
122 }
123
124 if (seen_pid)
125 {
126 puts ("found more than one PID line");
127 exit (1);
128 }
129 seen_pid = true;
130 }
131
132 close (fd[0]);
133
134 int status;
135 int err = waitpid (pid, &status, 0);
136 if (err != pid)
137 {
138 puts ("waitpid failed");
139 exit (1);
140 }
141
142 if (!seen_pid)
143 {
144 puts ("didn't get PID");
145 exit (1);
146 }
147
148 return 0;
149}
150
151#define TEST_FUNCTION do_test ()
152#include "../test-skeleton.c"
153

Warning: That file was not part of the compilation database. It may have many parsing errors.