xref: /onnv-gate/usr/src/lib/libbc/libc/sys/common/semsys.c (revision 3224:c0c9287a0eec)
10Sstevel@tonic-gate /*
20Sstevel@tonic-gate  * CDDL HEADER START
30Sstevel@tonic-gate  *
40Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*3224Sraf  * Common Development and Distribution License (the "License").
6*3224Sraf  * You may not use this file except in compliance with the License.
70Sstevel@tonic-gate  *
80Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
90Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
100Sstevel@tonic-gate  * See the License for the specific language governing permissions
110Sstevel@tonic-gate  * and limitations under the License.
120Sstevel@tonic-gate  *
130Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
140Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
150Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
160Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
170Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
180Sstevel@tonic-gate  *
190Sstevel@tonic-gate  * CDDL HEADER END
200Sstevel@tonic-gate  */
21*3224Sraf 
220Sstevel@tonic-gate /*
23*3224Sraf  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
240Sstevel@tonic-gate  * Use is subject to license terms.
250Sstevel@tonic-gate  */
260Sstevel@tonic-gate 
27*3224Sraf /*	Copyright (c) 1984 AT&T */
28*3224Sraf /*	  All Rights Reserved   */
290Sstevel@tonic-gate 
30722Smuffin #pragma ident	"%Z%%M%	%I%	%E% SMI"
310Sstevel@tonic-gate 
32*3224Sraf #include <sys/syscall.h>
33*3224Sraf #include <stdarg.h>
34*3224Sraf #include <sys/types.h>
35*3224Sraf #include <sys/ipc.h>
36*3224Sraf #include <sys/sem.h>
370Sstevel@tonic-gate 
380Sstevel@tonic-gate /* semsys dispatch argument */
39*3224Sraf #define	SEMCTL	0
40*3224Sraf #define	SEMGET	1
41*3224Sraf #define	SEMOP	2
420Sstevel@tonic-gate 
43722Smuffin int
semctl(int semid,int semnum,int cmd,union semun * arg)44722Smuffin semctl(int semid, int semnum, int cmd, union semun *arg)
450Sstevel@tonic-gate {
460Sstevel@tonic-gate 	switch (cmd) {
470Sstevel@tonic-gate 
480Sstevel@tonic-gate 	case IPC_STAT:
490Sstevel@tonic-gate 	case IPC_SET:
500Sstevel@tonic-gate 		cmd += 10;
510Sstevel@tonic-gate 		/* fall-through */
520Sstevel@tonic-gate 	case SETVAL:
530Sstevel@tonic-gate 	case GETALL:
540Sstevel@tonic-gate 	case SETALL:
55*3224Sraf 		return (_syscall(SYS_semsys, SEMCTL,
56*3224Sraf 		    semid, semnum, cmd, arg->val));
570Sstevel@tonic-gate 
580Sstevel@tonic-gate 	case IPC_RMID:
590Sstevel@tonic-gate 		cmd += 10;
600Sstevel@tonic-gate 		/* fall-through */
610Sstevel@tonic-gate 	default:
62*3224Sraf 		return (_syscall(SYS_semsys, SEMCTL,
63*3224Sraf 		    semid, semnum, cmd, 0));
640Sstevel@tonic-gate 	}
650Sstevel@tonic-gate }
660Sstevel@tonic-gate 
67722Smuffin int
semget(key_t key,int nsems,int semflg)68722Smuffin semget(key_t key, int nsems, int semflg)
690Sstevel@tonic-gate {
70722Smuffin 	return (_syscall(SYS_semsys, SEMGET, key, nsems, semflg));
710Sstevel@tonic-gate }
720Sstevel@tonic-gate 
73722Smuffin int
semop(int semid,struct sembuf * sops,int nsops)74722Smuffin semop(int semid, struct sembuf *sops, int nsops)
750Sstevel@tonic-gate {
76722Smuffin 	return (_syscall(SYS_semsys, SEMOP, semid, sops, nsops));
770Sstevel@tonic-gate }
780Sstevel@tonic-gate 
79722Smuffin int
semsys(int sysnum,...)80722Smuffin semsys(int sysnum, ...)
810Sstevel@tonic-gate {
820Sstevel@tonic-gate 	va_list ap;
830Sstevel@tonic-gate 	int semid, cmd;
840Sstevel@tonic-gate 	int semnum, val;
850Sstevel@tonic-gate 	union semun arg;
860Sstevel@tonic-gate 	key_t key;
870Sstevel@tonic-gate 	int nsems, semflg;
880Sstevel@tonic-gate 	struct sembuf *sops;
890Sstevel@tonic-gate 	int nsops;
900Sstevel@tonic-gate 
91722Smuffin 	va_start(ap, sysnum);
920Sstevel@tonic-gate 	switch (sysnum) {
930Sstevel@tonic-gate 	case SEMCTL:
94*3224Sraf 		semid = va_arg(ap, int);
95*3224Sraf 		semnum = va_arg(ap, int);
96*3224Sraf 		cmd = va_arg(ap, int);
97*3224Sraf 		val = va_arg(ap, int);
980Sstevel@tonic-gate 		if ((cmd == IPC_STAT) || (cmd == IPC_SET) || (cmd == IPC_RMID))
990Sstevel@tonic-gate 			cmd += 10;
100722Smuffin 		va_end(ap);
101722Smuffin 		return (_syscall(SYS_semsys, SEMCTL, semid, semnum, cmd, val));
1020Sstevel@tonic-gate 	case SEMGET:
103*3224Sraf 		key = va_arg(ap, key_t);
104*3224Sraf 		nsems = va_arg(ap, int);
105*3224Sraf 		semflg = va_arg(ap, int);
106722Smuffin 		va_end(ap);
107722Smuffin 		return (semget(key, nsems, semflg));
1080Sstevel@tonic-gate 	case SEMOP:
109*3224Sraf 		semid = va_arg(ap, int);
110*3224Sraf 		sops = va_arg(ap, struct sembuf *);
111*3224Sraf 		nsops = va_arg(ap, int);
112722Smuffin 		va_end(ap);
113722Smuffin 		return (semop(semid, sops, nsops));
1140Sstevel@tonic-gate 	}
115722Smuffin 	va_end(ap);
116722Smuffin 	return (-1);
1170Sstevel@tonic-gate }
118