semsys.c revision 5d54f3d8999eac1762fe0a8c7177d20f1f201fae
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
#include <syscall.h>
#include <stdarg.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>
/* semsys dispatch argument */
#define SEMCTL 0
#define SEMGET 1
#define SEMOP 2
int
semctl(int semid, int semnum, int cmd, union semun *arg)
{
switch (cmd) {
case IPC_STAT:
case IPC_SET:
cmd += 10;
/* fall-through */
case SETVAL:
case GETALL:
case SETALL:
return (_syscall(SYS_semsys,SEMCTL,semid,semnum,cmd,arg->val));
case IPC_RMID:
cmd += 10;
/* fall-through */
default:
return (_syscall(SYS_semsys,SEMCTL,semid,semnum,cmd,0));
}
}
int
semget(key_t key, int nsems, int semflg)
{
return (_syscall(SYS_semsys, SEMGET, key, nsems, semflg));
}
int
semop(int semid, struct sembuf *sops, int nsops)
{
return (_syscall(SYS_semsys, SEMOP, semid, sops, nsops));
}
int
semsys(int sysnum, ...)
{
va_list ap;
int semid, cmd;
int semnum, val;
union semun arg;
key_t key;
int nsems, semflg;
struct sembuf *sops;
int nsops;
va_start(ap, sysnum);
switch (sysnum) {
case SEMCTL:
semid=va_arg(ap, int);
semnum=va_arg(ap, int);
cmd=va_arg(ap, int);
val=va_arg(ap, int);
if ((cmd == IPC_STAT) || (cmd == IPC_SET) || (cmd == IPC_RMID))
cmd += 10;
va_end(ap);
return (_syscall(SYS_semsys, SEMCTL, semid, semnum, cmd, val));
case SEMGET:
key=va_arg(ap, key_t);
nsems=va_arg(ap, int);
semflg=va_arg(ap, int);
va_end(ap);
return (semget(key, nsems, semflg));
case SEMOP:
semid=va_arg(ap, int);
sops=va_arg(ap, struct sembuf *);
nsops=va_arg(ap, int);
va_end(ap);
return (semop(semid, sops, nsops));
}
va_end(ap);
return (-1);
}