/* Test opening a stream with a file descriptor.

   Copyright (C) 2011-2018 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 of the License, 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, see <https://www.gnu.org/licenses/>.  */

#include <config.h>

#include <stdio.h>

#include "signature.h"

SIGNATURE_CHECK (fdopen, FILE *, (int, const char *));

#include <errno.h>

#include <unistd.h>

#include "macros.h"

int

main (void)

{

  /* Test behavior on failure.  POSIX makes it hard to check for

     failure, since the behavior is not well-defined on invalid file

     descriptors, so try fdopen 1000 times and if that's not enough to

     fail due to EMFILE, so be it.  */

  int i;

  for (i = 0; i < 1000; i++)

    {

      errno = 0;

      if (! fdopen (STDOUT_FILENO, "w"))

        {

          ASSERT (errno != 0);

          break;

        }

    }

  return 0;

}