|  | /* Copyright (C) 1991-2016 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 <errno.h> | 
|  | #include <unistd.h> | 
|  | #include <stddef.h> | 
|  |  | 
|  | /* Create a one-way communication channel (__pipe). | 
|  | If successful, two file descriptors are stored in PIPEDES; | 
|  | bytes written on PIPEDES[1] can be read from PIPEDES[0]. | 
|  | Returns 0 if successful, -1 if not.  */ | 
|  | int | 
|  | __pipe (int __pipedes[2]) | 
|  | { | 
|  | if (__pipedes == NULL) | 
|  | { | 
|  | __set_errno (EINVAL); | 
|  | return -1; | 
|  | } | 
|  |  | 
|  | __set_errno (ENOSYS); | 
|  | return -1; | 
|  | } | 
|  | libc_hidden_def (__pipe) | 
|  | stub_warning (pipe) | 
|  |  | 
|  | weak_alias (__pipe, pipe) |