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[thirdparty/glibc.git] / inet / ifreq.c

diff --git a/inet/ifreq.c b/inet/ifreq.c
index f2f90662be1ee65b204d9ccfef542ccba39bd752..fcbbbdd986f0a0aea9dd34c00ab9f315ecbbf374 100644 (file)
--- a/inet/ifreq.c
+++ b/inet/ifreq.c
@@ -1,6 +1,6 @@
-/* Copyright (C) 1999, 2002, 2003, 2004 Free Software Foundation, Inc.
+/* Collect network interface list.  Stub version.
+   Copyright (C) 2013-2019 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
@@ -14,66 +14,13 @@
 
    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/>.  */
+   <https://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));
+  *num_ifs = 0;
+  *ifreqs = NULL;
 }