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/* Test of create_pipe_bidi/wait_subprocess.
Copyright (C) 2009 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#include <config.h>
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <error.h>
#include <pipe.h>
#include <wait-process.h>
const char* program_name = NULL;
static void
xfclose (FILE *ptr)
{
if (!ptr)
return;
if (ferror (ptr))
error (EXIT_FAILURE, 0, "I/O error");
if (fclose (ptr))
error (EXIT_FAILURE, errno, "fclose");
}
static void
test_pipe (void)
{
int fd[2];
char const *argv[9];
pid_t pid;
char buf[BUFSIZ];
/* Set up child. */
{
int i = 0;
char const *p = getenv ("M4");
char const *m4 = p ? p : "m4";
argv[i++] = m4;
argv[i++] = NULL;
assert (i <= sizeof argv / sizeof *argv);
}
pid = create_pipe_bidi(argv[0], argv[0], (char **) argv,
false, true, true, fd);
if (pid < 0)
error (EXIT_FAILURE, errno, "create_pipe_bidi");
/* Push child's input. */
{
FILE *out = fdopen (fd[1], "w");
if (! out)
error (EXIT_FAILURE, errno, "fdopen");
fprintf (out, "define(`a', `b')dnl\n");
fprintf (out, "define(`b', `c')dnl\n");
fprintf (out, "a\n");
xfclose (out);
}
/* Get child's output. */
{
FILE* in = fdopen (fd[0], "r");
if (! in)
error (EXIT_FAILURE, errno, "fdopen");
if (!fgets (buf, sizeof buf, in))
error (EXIT_FAILURE, 0, "fgets");
xfclose (in);
}
/* Wait for child. */
wait_subprocess (pid, argv[0], true, false, false, true, 0);
/* Check the result. */
assert (! strcmp (buf, "c\n"));
}
int
main (int argc, const char *argv[])
{
program_name = argv[0];
test_pipe ();
return 0;
}
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