inet/bug-if1.c

   1 /* Copyright (C) 2004-2024 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <limits.h>
  20 #include <stdio.h>
  21 #include <string.h>
  22 #include <net/if.h>
  23
  24
  25 static int
  26 do_test (void)
  27 {
  28   char buf[IF_NAMESIZE];
  29   /* Index 0 is always invalid (see RFC 3493).  */
  30   char *cp = if_indextoname (0, buf);
  31   if (cp != NULL)
  32     {
  33       printf ("invalid index returned result \"%s\"\n", cp);
  34       return 1;
  35     }
  36   else if (errno != ENXIO)
  37     {
  38       int err = errno;
  39       char errbuf1[256];
  40       char errbuf2[256];
  41
  42       printf ("errno = %d (%s), expected %d (%s)\n",
  43               err, strerror_r (err, errbuf1, sizeof (errbuf1)),
  44               ENXIO, strerror_r (ENXIO, errbuf2, sizeof (errbuf2)));
  45       return 1;
  46     }
  47
  48   return 0;
  49 }
  50
  51 #define TEST_FUNCTION do_test ()
  52 #include "../test-skeleton.c"