1 /* Test of posix_spawn() function.
2 Copyright (C) 2008 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
9 This program 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
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 /* Written by Bruno Haible <bruno@clisp.org>, 2008. */
31 #include <sys/types.h>
34 extern char **environ;
37 # define STDIN_FILENO 0
40 # define STDOUT_FILENO 1
43 # define STDERR_FILENO 2
46 #define CHILD_PROGRAM_FILENAME "test-posix_spawn1.sh"
51 if (0 <= fd && fd <= 2)
53 int f = fd_safer (dup (fd));
66 char *argv[3] = { "/bin/sh", CHILD_PROGRAM_FILENAME, NULL };
68 sigset_t blocked_signals;
69 sigset_t fatal_signal_set;
70 posix_spawn_file_actions_t actions;
71 bool actions_allocated;
72 posix_spawnattr_t attrs;
82 if (pipe (ifd) < 0 || (ifd[0] = fd_safer (ifd[0])) < 0)
84 perror ("cannot create pipe");
87 sigprocmask (SIG_SETMASK, NULL, &blocked_signals);
88 sigemptyset (&fatal_signal_set);
89 sigaddset (&fatal_signal_set, SIGINT);
90 sigaddset (&fatal_signal_set, SIGTERM);
91 sigaddset (&fatal_signal_set, SIGHUP);
92 sigaddset (&fatal_signal_set, SIGPIPE);
93 sigprocmask (SIG_BLOCK, &fatal_signal_set, NULL);
94 actions_allocated = false;
95 attrs_allocated = false;
96 if ((err = posix_spawn_file_actions_init (&actions)) != 0
97 || (actions_allocated = true,
98 (err = posix_spawn_file_actions_adddup2 (&actions, ifd[1], STDOUT_FILENO)) != 0
99 || (err = posix_spawn_file_actions_addclose (&actions, ifd[1])) != 0
100 || (err = posix_spawn_file_actions_addclose (&actions, ifd[0])) != 0
101 || (err = posix_spawn_file_actions_addopen (&actions, STDIN_FILENO, "/dev/null", O_RDONLY, 0)) != 0
102 || (err = posix_spawnattr_init (&attrs)) != 0
103 || (attrs_allocated = true,
104 (err = posix_spawnattr_setsigmask (&attrs, &blocked_signals)) != 0
105 || (err = posix_spawnattr_setflags (&attrs, POSIX_SPAWN_SETSIGMASK)) != 0)
106 || (err = posix_spawnp (&child, "/bin/sh", &actions, &attrs, argv, environ)) != 0))
108 if (actions_allocated)
109 posix_spawn_file_actions_destroy (&actions);
111 posix_spawnattr_destroy (&attrs);
112 sigprocmask (SIG_UNBLOCK, &fatal_signal_set, NULL);
114 perror ("subprocess failed");
117 posix_spawn_file_actions_destroy (&actions);
118 posix_spawnattr_destroy (&attrs);
119 sigprocmask (SIG_UNBLOCK, &fatal_signal_set, NULL);
122 fp = fdopen (fd, "r");
125 fprintf (stderr, "fdopen() failed\n");
128 if (fread (line, 1, 80, fp) < 12)
130 fprintf (stderr, "could not read expected output\n");
133 if (memcmp (line, "Halle Potta", 11) != 0)
135 fprintf (stderr, "read output is not the expected output");
140 while (waitpid (child, &status, 0) != child)
142 if (!WIFEXITED (status))
144 fprintf (stderr, "subprocess terminated with unexpected wait status %d\n", status);
147 exitstatus = WEXITSTATUS (status);
150 fprintf (stderr, "subprocess terminated with unexpected exit status %d\n", exitstatus);