1
/* Test of posix_spawn() function.
2
Copyright (C) 2008-2012 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;
36
#define CHILD_PROGRAM_FILENAME "test-posix_spawn2.sh"
41
if (0 <= fd && fd <= 2)
43
int f = fd_safer (dup (fd));
56
char *argv[3] = { (char *) "/bin/sh", (char *) CHILD_PROGRAM_FILENAME, NULL };
58
sigset_t blocked_signals;
59
sigset_t fatal_signal_set;
60
posix_spawn_file_actions_t actions;
61
bool actions_allocated;
62
posix_spawnattr_t attrs;
72
if (pipe (ofd) < 0 || (ofd[1] = fd_safer (ofd[1])) < 0)
74
perror ("cannot create pipe");
77
sigprocmask (SIG_SETMASK, NULL, &blocked_signals);
78
sigemptyset (&fatal_signal_set);
79
sigaddset (&fatal_signal_set, SIGINT);
80
sigaddset (&fatal_signal_set, SIGTERM);
81
sigaddset (&fatal_signal_set, SIGHUP);
82
sigaddset (&fatal_signal_set, SIGPIPE);
83
sigprocmask (SIG_BLOCK, &fatal_signal_set, NULL);
84
actions_allocated = false;
85
attrs_allocated = false;
86
if ((err = posix_spawn_file_actions_init (&actions)) != 0
87
|| (actions_allocated = true,
88
(err = posix_spawn_file_actions_adddup2 (&actions, ofd[0], STDIN_FILENO)) != 0
89
|| (err = posix_spawn_file_actions_addclose (&actions, ofd[0])) != 0
90
|| (err = posix_spawn_file_actions_addclose (&actions, ofd[1])) != 0
91
|| (err = posix_spawnattr_init (&attrs)) != 0
92
|| (attrs_allocated = true,
93
(err = posix_spawnattr_setsigmask (&attrs, &blocked_signals)) != 0
94
|| (err = posix_spawnattr_setflags (&attrs, POSIX_SPAWN_SETSIGMASK)) != 0)
95
|| (err = posix_spawnp (&child, "/bin/sh", &actions, &attrs, argv, environ)) != 0))
97
if (actions_allocated)
98
posix_spawn_file_actions_destroy (&actions);
100
posix_spawnattr_destroy (&attrs);
101
sigprocmask (SIG_UNBLOCK, &fatal_signal_set, NULL);
103
perror ("subprocess failed");
106
posix_spawn_file_actions_destroy (&actions);
107
posix_spawnattr_destroy (&attrs);
108
sigprocmask (SIG_UNBLOCK, &fatal_signal_set, NULL);
111
fp = fdopen (fd, "w");
114
fprintf (stderr, "fdopen() failed\n");
117
written = fwrite ("Halle Potta\n", 1, 12, fp);
120
fprintf (stderr, "could not write input\n");
125
while (waitpid (child, &status, 0) != child)
127
if (!WIFEXITED (status))
129
fprintf (stderr, "subprocess terminated with unexpected wait status %d\n", status);
132
exitstatus = WEXITSTATUS (status);
135
fprintf (stderr, "subprocess terminated with unexpected exit status %d\n", exitstatus);