True stub __ifreq.

ChangeLog

@@ -1,5 +1,9 @@
 2013-08-27  Roland McGrath  <roland@hack.frob.com>
 
+	* inet/ifreq.c: Moved to ...
+	* sysdeps/unix/ifreq.c: ... here.
+	* inet/ifreq.c: New file, true stub version.
+
 	* socket/sa_len.c: New file.
 	* socket/Makefile (aux): Add it.
 	* sysdeps/unix/sysv/linux/Makefile

inet/ifreq.c

@@ -1,6 +1,6 @@
-/* Copyright (C) 1999-2013 Free Software Foundation, Inc.
+/* Collect network interface list.  Stub version.
+   Copyright (C) 2013 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Andreas Jaeger <aj@suse.de>.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
@@ -18,62 +18,9 @@
 
 #include "ifreq.h"
 
-
 void
 __ifreq (struct ifreq **ifreqs, int *num_ifs, int sockfd)
 {
-  int fd = sockfd;
+  *num_ifs = 0;
-  struct ifconf ifc;
+  *ifreqs = NULL;
-  int rq_len;
-  int nifs;
-# define RQ_IFS	4
-
-  if (fd < 0)
-    fd = __opensock ();
-  if (fd < 0)
-    {
-      *num_ifs = 0;
-      *ifreqs = NULL;
-      return;
-    }
-
-  ifc.ifc_buf = NULL;
-  rq_len = RQ_IFS * sizeof (struct ifreq) / 2; /* Doubled in the loop.  */
-  do
-    {
-      ifc.ifc_len = rq_len *= 2;
-      void *newp = realloc (ifc.ifc_buf, ifc.ifc_len);
-      if (newp == NULL || __ioctl (fd, SIOCGIFCONF, &ifc) < 0)
-	{
-	  free (ifc.ifc_buf);
-
-	  if (fd != sockfd)
-	    __close (fd);
-	  *num_ifs = 0;
-	  *ifreqs = NULL;
-	  return;
-	}
-      ifc.ifc_buf = newp;
-    }
-  while (rq_len < sizeof (struct ifreq) + ifc.ifc_len);
-
-  if (fd != sockfd)
-    __close (fd);
-
-#ifdef _HAVE_SA_LEN
-  struct ifreq *ifr = *ifreqs;
-  nifs = 0;
-  while ((char *) ifr < ifc.ifc_buf + ifc.ifc_len)
-    {
-      ++nifs;
-      ifr = __if_nextreq (ifr);
-      if (ifr == NULL)
-	break;
-    }
-#else
-  nifs = ifc.ifc_len / sizeof (struct ifreq);
-#endif
-
-  *num_ifs = nifs;
-  *ifreqs = realloc (ifc.ifc_buf, nifs * sizeof (struct ifreq));
 }

sysdeps/unix/ifreq.c

@@ -0,0 +1,79 @@
+/* Copyright (C) 1999-2013 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Andreas Jaeger <aj@suse.de>.
+
+   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 "ifreq.h"
+
+
+void
+__ifreq (struct ifreq **ifreqs, int *num_ifs, int sockfd)
+{
+  int fd = sockfd;
+  struct ifconf ifc;
+  int rq_len;
+  int nifs;
+# define RQ_IFS	4
+
+  if (fd < 0)
+    fd = __opensock ();
+  if (fd < 0)
+    {
+      *num_ifs = 0;
+      *ifreqs = NULL;
+      return;
+    }
+
+  ifc.ifc_buf = NULL;
+  rq_len = RQ_IFS * sizeof (struct ifreq) / 2; /* Doubled in the loop.  */
+  do
+    {
+      ifc.ifc_len = rq_len *= 2;
+      void *newp = realloc (ifc.ifc_buf, ifc.ifc_len);
+      if (newp == NULL || __ioctl (fd, SIOCGIFCONF, &ifc) < 0)
+	{
+	  free (ifc.ifc_buf);
+
+	  if (fd != sockfd)
+	    __close (fd);
+	  *num_ifs = 0;
+	  *ifreqs = NULL;
+	  return;
+	}
+      ifc.ifc_buf = newp;
+    }
+  while (rq_len < sizeof (struct ifreq) + ifc.ifc_len);
+
+  if (fd != sockfd)
+    __close (fd);
+
+#ifdef _HAVE_SA_LEN
+  struct ifreq *ifr = *ifreqs;
+  nifs = 0;
+  while ((char *) ifr < ifc.ifc_buf + ifc.ifc_len)
+    {
+      ++nifs;
+      ifr = __if_nextreq (ifr);
+      if (ifr == NULL)
+	break;
+    }
+#else
+  nifs = ifc.ifc_len / sizeof (struct ifreq);
+#endif
+
+  *num_ifs = nifs;
+  *ifreqs = realloc (ifc.ifc_buf, nifs * sizeof (struct ifreq));
+}