inet/ifaddrs.c

   1 /* getifaddrs -- get names and addresses of all network interfaces
   2    Copyright (C) 2002-2016 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <ifaddrs.h>
  20 #include <errno.h>
  21 #include <stdlib.h>
  22
  23 /* Create a linked list of `struct ifaddrs' structures, one for each
  24    network interface on the host machine.  If successful, store the
  25    list in *IFAP and return 0.  On errors, return -1 and set `errno'.  */
  26 int
  27 __getifaddrs (struct ifaddrs **ifap)
  28 {
  29   __set_errno (ENOSYS);
  30   return -1;
  31 }
  32 weak_alias (__getifaddrs, getifaddrs)
  33 libc_hidden_weak (getifaddrs)
  34 stub_warning (getifaddrs)
  35
  36 void
  37 __freeifaddrs (struct ifaddrs *ifa)
  38 {
  39   if (ifa == NULL)
  40     return;                     /* a la free, why not? */
  41
  42   /* Can't be called properly if getifaddrs never succeeded.  */
  43   abort ();
  44 }
  45 weak_alias (__freeifaddrs, freeifaddrs)
  46 libc_hidden_weak (freeifaddrs)
  47 stub_warning (freeifaddrs)