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* build-aux/gendocs.sh (version): * doc/gendocs_template: * doc/gendocs_template_min: * doc/gnulib.texi: * lib/version-etc.c (COPYRIGHT_YEAR): Update copyright dates by hand in templates and the like. * all files: Run 'make update-copyright'.
94 lines
2.6 KiB
C
94 lines
2.6 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> and a form of <stdio.h> first. */
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/* Helpers. */
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#include <stdlib.h>
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#include <string.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include "macros.h"
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int
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main (int argc, char **argv)
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{
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size_t len;
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char *cmd;
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int i;
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/* Children - use the pipe. */
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if (argc > 1)
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{
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if (*argv[1] == 'r') /* Parent is reading, so we write. */
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ASSERT (putchar ('c') == 'c');
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else /* Parent is writing, so we read. */
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ASSERT (getchar () == 'p');
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/* Test that parent can read non-zero status. */
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return 42;
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}
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/* Parent - create read and write child, once under normal
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circumstances and once with stdin and stdout closed. */
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len = strlen (argv[0]);
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cmd = malloc (len + 3); /* Adding " r" and NUL. */
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ASSERT (cmd);
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/* We count on argv[0] not containing any shell metacharacters. */
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strcpy (cmd, argv[0]);
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cmd[len] = ' ';
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cmd[len + 2] = '\0';
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for (i = 0; i < 2; i++)
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{
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FILE *child;
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int status;
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if (i)
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{
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ASSERT (fclose (stdin) == 0);
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ASSERT (fclose (stdout) == 0);
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}
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cmd[len + 1] = 'r';
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ASSERT (child = popen (cmd, "r"));
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ASSERT (fgetc (child) == 'c');
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status = pclose (child);
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ASSERT (WIFEXITED (status));
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ASSERT (WEXITSTATUS (status) == 42);
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if (i)
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{
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ASSERT (dup2 (STDIN_FILENO, STDIN_FILENO) == -1);
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ASSERT (dup2 (STDOUT_FILENO, STDOUT_FILENO) == -1);
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}
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cmd[len + 1] = 'w';
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ASSERT (child = popen (cmd, "w"));
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ASSERT (fputc ('p', child) == 'p');
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status = pclose (child);
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ASSERT (WIFEXITED (status));
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ASSERT (WEXITSTATUS (status) == 42);
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if (i)
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{
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ASSERT (dup2 (STDIN_FILENO, STDIN_FILENO) == -1);
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ASSERT (dup2 (STDOUT_FILENO, STDOUT_FILENO) == -1);
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}
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}
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free (cmd);
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return 0;
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}
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