1 /* Copyright (C) 2004-2022 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
do_test(void)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"
53