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77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
/* Test of opening a subcommand stream.
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Copyright (C) 2009-2017 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 Eric Blake <ebb9@byu.net>, 2009. */
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#include <config.h>
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/* Specification. */
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#include "stdio--.h"
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/* Helpers. */
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#include <sys/wait.h>
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#include <unistd.h>
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/* This test intentionally closes stderr. So, we arrange to have fd 10
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(outside the range of interesting fd's during the test) set up to
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duplicate the original stderr. */
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#define BACKUP_STDERR_FILENO 10
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#define ASSERT_STREAM myerr
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#include "macros.h"
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static FILE *myerr;
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int
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main (int argc, char **argv)
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{
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FILE *fp;
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int status;
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/* We close fd 2 later, so save it in fd 10. */
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if (dup2 (STDERR_FILENO, BACKUP_STDERR_FILENO) != BACKUP_STDERR_FILENO
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|| (myerr = fdopen (BACKUP_STDERR_FILENO, "w")) == NULL)
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return 2;
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ASSERT (fp = popen ("exit 0", "r"));
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ASSERT (STDERR_FILENO < fileno (fp));
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status = pclose (fp);
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ASSERT (WIFEXITED (status));
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ASSERT (!WEXITSTATUS (status));
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ASSERT (fclose (stdin) == 0);
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ASSERT (fp = popen ("exit 0", "r"));
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ASSERT (STDERR_FILENO < fileno (fp));
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status = pclose (fp);
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ASSERT (WIFEXITED (status));
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ASSERT (!WEXITSTATUS (status));
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ASSERT (fclose (stdout) == 0);
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ASSERT (fp = popen ("exit 0", "r"));
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ASSERT (STDERR_FILENO < fileno (fp));
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status = pclose (fp);
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ASSERT (WIFEXITED (status));
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ASSERT (!WEXITSTATUS (status));
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ASSERT (fclose (stderr) == 0);
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ASSERT (fp = popen ("exit 0", "r"));
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ASSERT (STDERR_FILENO < fileno (fp));
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status = pclose (fp);
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ASSERT (WIFEXITED (status));
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ASSERT (!WEXITSTATUS (status));
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return 0;
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}
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