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/* Test of posix_spawn() function.
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Copyright (C) 2008-2012 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* Written by Bruno Haible <bruno@clisp.org>, 2008. */
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#include "signature.h"
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SIGNATURE_CHECK (posix_spawnp, int, (pid_t *, char const *,
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posix_spawn_file_actions_t const *,
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posix_spawnattr_t const *,
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char *const[], char *const[]));
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SIGNATURE_CHECK (posix_spawnattr_init, int, (posix_spawnattr_t *));
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SIGNATURE_CHECK (posix_spawnattr_destroy, int, (posix_spawnattr_t *));
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SIGNATURE_CHECK (posix_spawnattr_setsigmask, int, (posix_spawnattr_t *,
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SIGNATURE_CHECK (posix_spawnattr_setflags, int, (posix_spawnattr_t *, short));
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SIGNATURE_CHECK (posix_spawn_file_actions_init, int,
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(posix_spawn_file_actions_t *));
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SIGNATURE_CHECK (posix_spawn_file_actions_destroy, int,
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(posix_spawn_file_actions_t *));
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SIGNATURE_CHECK (posix_spawn_file_actions_addclose, int,
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(posix_spawn_file_actions_t *, int));
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SIGNATURE_CHECK (posix_spawn_file_actions_addopen, int,
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(posix_spawn_file_actions_t *, int, char const *, int,
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SIGNATURE_CHECK (posix_spawn_file_actions_adddup2, int,
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(posix_spawn_file_actions_t *, int, int));
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#include <sys/types.h>
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extern char **environ;
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#define CHILD_PROGRAM_FILENAME "test-posix_spawn1.sh"
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if (0 <= fd && fd <= 2)
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int f = fd_safer (dup (fd));
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char *argv[3] = { (char *) "/bin/sh", (char *) CHILD_PROGRAM_FILENAME, NULL };
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sigset_t blocked_signals;
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sigset_t fatal_signal_set;
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posix_spawn_file_actions_t actions;
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bool actions_allocated;
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posix_spawnattr_t attrs;
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if (pipe (ifd) < 0 || (ifd[0] = fd_safer (ifd[0])) < 0)
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perror ("cannot create pipe");
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sigprocmask (SIG_SETMASK, NULL, &blocked_signals);
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sigemptyset (&fatal_signal_set);
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sigaddset (&fatal_signal_set, SIGINT);
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sigaddset (&fatal_signal_set, SIGTERM);
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sigaddset (&fatal_signal_set, SIGHUP);
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sigaddset (&fatal_signal_set, SIGPIPE);
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sigprocmask (SIG_BLOCK, &fatal_signal_set, NULL);
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actions_allocated = false;
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attrs_allocated = false;
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if ((err = posix_spawn_file_actions_init (&actions)) != 0
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|| (actions_allocated = true,
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(err = posix_spawn_file_actions_adddup2 (&actions, ifd[1], STDOUT_FILENO)) != 0
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|| (err = posix_spawn_file_actions_addclose (&actions, ifd[1])) != 0
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|| (err = posix_spawn_file_actions_addclose (&actions, ifd[0])) != 0
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|| (err = posix_spawn_file_actions_addopen (&actions, STDIN_FILENO, "/dev/null", O_RDONLY, 0)) != 0
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|| (err = posix_spawnattr_init (&attrs)) != 0
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|| (attrs_allocated = true,
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(err = posix_spawnattr_setsigmask (&attrs, &blocked_signals)) != 0
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|| (err = posix_spawnattr_setflags (&attrs, POSIX_SPAWN_SETSIGMASK)) != 0)
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|| (err = posix_spawnp (&child, "/bin/sh", &actions, &attrs, argv, environ)) != 0))
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if (actions_allocated)
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posix_spawn_file_actions_destroy (&actions);
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posix_spawnattr_destroy (&attrs);
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sigprocmask (SIG_UNBLOCK, &fatal_signal_set, NULL);
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perror ("subprocess failed");
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posix_spawn_file_actions_destroy (&actions);
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posix_spawnattr_destroy (&attrs);
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sigprocmask (SIG_UNBLOCK, &fatal_signal_set, NULL);
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fp = fdopen (fd, "r");
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fprintf (stderr, "fdopen() failed\n");
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if (fread (line, 1, 80, fp) < 12)
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fprintf (stderr, "could not read expected output\n");
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if (memcmp (line, "Halle Potta", 11) != 0)
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fprintf (stderr, "read output is not the expected output");
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while (waitpid (child, &status, 0) != child)
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if (!WIFEXITED (status))
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fprintf (stderr, "subprocess terminated with unexpected wait status %d\n", status);
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exitstatus = WEXITSTATUS (status);
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fprintf (stderr, "subprocess terminated with unexpected exit status %d\n", exitstatus);