49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
/* 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 <errno.h>
|
|
#include <sys/msg.h>
|
|
#include <ipc_priv.h>
|
|
|
|
#include <sysdep-cancel.h>
|
|
#include <sys/syscall.h>
|
|
|
|
/* Kludge to work around Linux' restriction of only up to five
|
|
arguments to a system call. */
|
|
struct ipc_kludge
|
|
{
|
|
void *msgp;
|
|
long int msgtyp;
|
|
};
|
|
|
|
|
|
ssize_t
|
|
__libc_msgrcv (int msqid, void *msgp, size_t msgsz, long int msgtyp,
|
|
int msgflg)
|
|
{
|
|
/* The problem here is that Linux' calling convention only allows up to
|
|
fives parameters to a system call. */
|
|
struct ipc_kludge tmp;
|
|
|
|
tmp.msgp = msgp;
|
|
tmp.msgtyp = msgtyp;
|
|
|
|
return SYSCALL_CANCEL (ipc, IPCOP_msgrcv, msqid, msgsz, msgflg, &tmp);
|
|
}
|
|
weak_alias (__libc_msgrcv, msgrcv)
|