|  | /* Copyright (C) 1995-2016 Free Software Foundation, Inc. | 
|  | This file is part of the GNU C Library. | 
|  | Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995. | 
|  |  | 
|  | 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/msg.h> | 
|  | #include <errno.h> | 
|  |  | 
|  | /* Read a message from the queue associated with the message queue | 
|  | descriptor MSQID.  At most MSGSZ bytes of the message are placed | 
|  | in the buffer specified by the MSGP parameter.  The MSGTYP parameter | 
|  | describes which message is returned in MSGFLG describes the behaviour | 
|  | in buffer overflow or queue underflow.  */ | 
|  |  | 
|  | ssize_t | 
|  | msgrcv (int msqid, void *msgp, size_t msgsz, long msgtyp, int msgflg) | 
|  | { | 
|  | __set_errno (ENOSYS); | 
|  | return -1; | 
|  | } | 
|  |  | 
|  | stub_warning (msgrcv) |