1 files changed, 59 insertions, 0 deletions
diff --git a/inet/test_ifindex.c b/inet/test_ifindex.c
new file mode 100644
index 0000000000..f0a34cf0da
--- /dev/null
+++ b/inet/test_ifindex.c
@@ -0,0 +1,59 @@
+/* Test interface name <-> index conversions.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Philip Blundell <Philip.Blundell@pobox.com>.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <net/if.h>
+
+int
+main (void)
+{
+  int failures = 0;
+  struct if_nameindex *idx = if_nameindex (), *p;
+  if (idx == NULL)
+    {
+      if (errno != ENOSYS)
+	{
+	  printf ("Couldn't get any interfaces.\n");
+	  exit (1);
+	}
+      /* The function is simply not implemented.  */
+      exit (0);
+    }
+
+  printf ("Idx            Name | Idx           Name\n");
+
+  for (p = idx; p->if_index || p->if_name; ++p)
+    {
+      char buf[IFNAMSIZ];
+      int ni, result;
+      printf ("%3d %15s | ", p->if_index, p->if_name);
+      printf ("%3d", ni = if_nametoindex (p->if_name));
+      printf ("%15s", if_indextoname (p->if_index, buf));
+      result = (ni != p->if_index || (strcmp (buf, p->if_name)));
+      printf ("%10s", result ? "fail" : "okay");
+      printf ("\n");
+      failures += result;
+    }
+  if_freenameindex (idx);
+  exit (failures ? 1 : 0);
+}