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diff --git a/inet/bug-if1.c b/inet/bug-if1.c
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+/* Copyright (C) 2004 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <errno.h>
+#include <limits.h>
+#include <stdio.h>
+#include <net/if.h>
+
+
+static int
+do_test (void)
+{
+ /* Get list of all interfaces. */
+ struct if_nameindex *il = if_nameindex ();
+ if (il == NULL)
+ {
+ puts ("cannot get interface list, maybe the system does not support networking; bailing out");
+ return 0;
+ }
+
+ /* Determine the highest interface number. */
+ unsigned int max = 0;
+ for (int cnt = 0; il[cnt].if_name != NULL; ++cnt)
+ if (il[cnt].if_index > max)
+ max = il[cnt].if_index;
+
+ /* Use the next higher value (if possible). */
+ if (max == UINT_MAX)
+ {
+ puts ("highest index too high; need more clever way to determine test index");
+ return 0;
+ }
+
+ char buf[IF_NAMESIZE];
+ char *cp = if_indextoname (max + 1, 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"