| /* 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) |