|  | /* getifaddrs -- get names and addresses of all network interfaces | 
|  | Copyright (C) 2002-2016 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 <ifaddrs.h> | 
|  | #include <errno.h> | 
|  | #include <stdlib.h> | 
|  |  | 
|  | /* Create a linked list of `struct ifaddrs' structures, one for each | 
|  | network interface on the host machine.  If successful, store the | 
|  | list in *IFAP and return 0.  On errors, return -1 and set `errno'.  */ | 
|  | int | 
|  | __getifaddrs (struct ifaddrs **ifap) | 
|  | { | 
|  | __set_errno (ENOSYS); | 
|  | return -1; | 
|  | } | 
|  | weak_alias (__getifaddrs, getifaddrs) | 
|  | libc_hidden_weak (getifaddrs) | 
|  | stub_warning (getifaddrs) | 
|  |  | 
|  | void | 
|  | __freeifaddrs (struct ifaddrs *ifa) | 
|  | { | 
|  | if (ifa == NULL) | 
|  | return;			/* a la free, why not? */ | 
|  |  | 
|  | /* Can't be called properly if getifaddrs never succeeded.  */ | 
|  | abort (); | 
|  | } | 
|  | weak_alias (__freeifaddrs, freeifaddrs) | 
|  | libc_hidden_weak (freeifaddrs) | 
|  | stub_warning (freeifaddrs) |