add GNU libc test for ifaddrs.c

test/inet/Makefile.in

@@ -3,7 +3,7 @@
 #
 ifeq ($(UCLIBC_HAS_IPV4)$(UCLIBC_HAS_IPV6),)
 TESTS_DISABLED := bug-if1 gethost_r-align gethostid if_nameindex tst-aton \
-	tst-network tst-ntoa
+	tst-network tst-ntoa test-ifaddrs
 endif
 
 ifeq ($(UCLIBC_HAS_SOCKET)$(UCLIBC_HAS_IPV4)$(UCLIBC_HAS_IPV6),)

test/inet/tst-ifaddrs.c

@@ -0,0 +1,99 @@
+/* Test listing of network interface addresses.
+   Copyright (C) 2002-2015 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ifaddrs.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+static int failures;
+
+static const char *
+addr_string (struct sockaddr *sa, char *buf, size_t size)
+{
+  if (sa == NULL)
+    return "<none>";
+
+  switch (sa->sa_family)
+    {
+    case AF_INET:
+      return inet_ntop (AF_INET, &((struct sockaddr_in *) sa)->sin_addr,
+			buf, size);
+    case AF_INET6:
+      return inet_ntop (AF_INET6, &((struct sockaddr_in6 *) sa)->sin6_addr,
+			buf, size);
+#ifdef AF_LINK
+    case AF_LINK:
+      return "<link>";
+#endif
+    case AF_UNSPEC:
+      return "---";
+
+#ifdef AF_PACKET
+    case AF_PACKET:
+      return "<packet>";
+#endif
+
+    default:
+      ++failures;
+      printf ("sa_family=%d %08x\n", sa->sa_family,
+	      *(int*)&((struct sockaddr_in *) sa)->sin_addr.s_addr);
+      return "<unexpected sockaddr family>";
+    }
+}
+
+
+static int
+do_test (void)
+{
+  struct ifaddrs *ifaces, *ifa;
+
+  if (getifaddrs (&ifaces) < 0)
+    {
+      if (errno != ENOSYS)
+	{
+	  printf ("Couldn't get any interfaces: %s.\n", strerror (errno));
+	  exit (1);
+	}
+      /* The function is simply not implemented.  */
+      exit (0);
+    }
+
+  puts ("\
+Name           Flags   Address         Netmask         Broadcast/Destination");
+
+  for (ifa = ifaces; ifa != NULL; ifa = ifa->ifa_next)
+    {
+      char abuf[64], mbuf[64], dbuf[64];
+      printf ("%-15s%#.4x  %-15s %-15s %-15s\n",
+	      ifa->ifa_name, ifa->ifa_flags,
+	      addr_string (ifa->ifa_addr, abuf, sizeof (abuf)),
+	      addr_string (ifa->ifa_netmask, mbuf, sizeof (mbuf)),
+	      addr_string (ifa->ifa_broadaddr, dbuf, sizeof (dbuf)));
+    }
+
+  freeifaddrs (ifaces);
+
+  return failures ? 1 : 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"