/* Copyright (C) 2004-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Ulrich Drepper <drepper@redhat.com>, 2004.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

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

#include <errno.h>

#include <limits.h>

#include <stdio.h>

#include <string.h>

#include <net/if.h>

static int

do_test (void)

{

  char buf[IF_NAMESIZE];

  /* Index 0 is always invalid (see RFC 3493).  */

  char *cp = if_indextoname (0, buf);

  if (cp != NULL)

    {

      printf ("invalid index returned result \"%s\"\n", cp);

      return 1;

    }

  else if (errno != ENXIO)

    {

      int err = errno;

      char errbuf1[256];

      char errbuf2[256];

      printf ("errno = %d (%s), expected %d (%s)\n",

	      err, strerror_r (err, errbuf1, sizeof (errbuf1)),

	      ENXIO, strerror_r (ENXIO, errbuf2, sizeof (errbuf2)));

      return 1;

    }

  return 0;

}

#define TEST_FUNCTION do_test ()

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