|  | /* Poll (or wait) for file descriptor I/O availability.  Stub version. | 
|  | Copyright (C) 1994-2016 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 <sys/poll.h> | 
|  | #include <errno.h> | 
|  |  | 
|  | /* Poll the file descriptors described by the NFDS structures starting at | 
|  | FDS.  If TIMEOUT is nonzero and not -1, allow TIMEOUT milliseconds for | 
|  | an event to occur; if TIMEOUT is -1, block until an event occurs. | 
|  | Returns the number of file descriptors with events, zero if timed out, | 
|  | or -1 for errors.  */ | 
|  |  | 
|  | int | 
|  | __poll (struct pollfd *fds, nfds_t nfds, int timeout) | 
|  | { | 
|  | __set_errno (ENOSYS); | 
|  | return -1; | 
|  | } | 
|  | libc_hidden_def (__poll) | 
|  | weak_alias (__poll, poll) | 
|  |  | 
|  | stub_warning (poll) |