/* Test of fwrite() function, adapted from gnulib-tests in grep.

   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, 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 <http://www.gnu.org/licenses/>.  */

#include <errno.h>

#include <fcntl.h>

#include <unistd.h>

#include <stdio.h>

#include <stdlib.h>

static int

do_test (void)

{

  char tmpl[] = "/tmp/tst-fwrite-error.XXXXXX";

  int fd = mkstemp (tmpl);

  if (fd == -1)

    {

      printf ("mkstemp failed with errno %d\n", errno);

      return 1;

    }

  FILE *fp = fdopen (fd, "w");

  if (fp == NULL)

    {

      printf ("fdopen failed with errno %d\n", errno);

      return 1;

    }

  char buf[] = "world";

  setvbuf (fp, NULL, _IONBF, 0);

  close (fd);

  unlink (tmpl);

  errno = 0;

  int ret = fwrite (buf, 1, sizeof (buf), fp);

  if (ret != 0)

    {

      printf ("fwrite returned %d\n", ret);

      return 1;

    }

  if (errno != EBADF)

    {

      printf ("Errno is not EBADF: %d\n", errno);

      return 1;

    }

  if (ferror (fp) == 0)

    {

      printf ("ferror not set\n");

      return 1;

    }

  return 0;

}

#define TEST_FUNCTION do_test ()

#include "../test-skeleton.c"