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[glibc.git] / nptl / tst-exec3.c
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1 /* Thread calls exec.
2 Copyright (C) 2002 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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.
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.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 02111-1307 USA. */
21 #include <errno.h>
22 #include <paths.h>
23 #include <pthread.h>
24 #include <signal.h>
25 #include <spawn.h>
26 #include <stdbool.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <unistd.h>
30 #include <sys/wait.h>
33 static void *
34 tf (void *arg)
36 execl (_PATH_BSHELL, _PATH_BSHELL, "-c", "echo $$", NULL);
38 puts ("execl failed");
39 exit (1);
43 static int
44 do_test (void)
46 int fd[2];
47 if (pipe (fd) != 0)
49 puts ("pipe failed");
50 exit (1);
53 /* Not interested in knowing when the pipe is closed. */
54 if (sigignore (SIGPIPE) != 0)
56 puts ("sigignore failed");
57 exit (1);
60 pid_t pid = fork ();
61 if (pid == -1)
63 puts ("fork failed");
64 exit (1);
67 if (pid == 0)
69 /* Use the fd for stdout. This is kind of ugly because it
70 substitutes the fd of stdout but we know what we are doing
71 here... */
72 if (dup2 (fd[1], STDOUT_FILENO) != STDOUT_FILENO)
74 puts ("dup2 failed");
75 exit (1);
78 close (fd[0]);
80 pthread_t th;
81 if (pthread_create (&th, NULL, tf, NULL) != 0)
83 puts ("create failed");
84 exit (1);
87 if (pthread_join (th, NULL) == 0)
89 puts ("join succeeded!?");
90 exit (1);
93 puts ("join returned!?");
94 exit (1);
97 close (fd[1]);
99 char buf[200];
100 ssize_t n;
101 bool seen_pid = false;
102 while (TEMP_FAILURE_RETRY ((n = read (fd[0], buf, sizeof (buf)))) > 0)
104 /* We only expect to read the PID. */
105 char *endp;
106 long int rpid = strtol (buf, &endp, 10);
108 if (*endp != '\n')
110 printf ("didn't parse whole line: \"%s\"\n", buf);
111 exit (1);
113 if (endp == buf)
115 puts ("read empty line");
116 exit (1);
119 if (rpid != pid)
121 printf ("found \"%s\", expected PID %ld\n", buf, (long int) pid);
122 exit (1);
125 if (seen_pid)
127 puts ("found more than one PID line");
128 exit (1);
130 seen_pid = true;
133 close (fd[0]);
135 int status;
136 int err = waitpid (pid, &status, 0);
137 if (err != pid)
139 puts ("waitpid failed");
140 exit (1);
143 if (!seen_pid)
145 puts ("didn't get PID");
146 exit (1);
149 return 0;
152 #define TEST_FUNCTION do_test ()
153 #include "../test-skeleton.c"