1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984 AT&T */ 28 /* All Rights Reserved */ 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #include <sys/syscall.h> 33 #include <stdarg.h> 34 #include <sys/types.h> 35 #include <sys/ipc.h> 36 #include <sys/sem.h> 37 38 /* semsys dispatch argument */ 39 #define SEMCTL 0 40 #define SEMGET 1 41 #define SEMOP 2 42 43 int 44 semctl(int semid, int semnum, int cmd, union semun *arg) 45 { 46 switch (cmd) { 47 48 case IPC_STAT: 49 case IPC_SET: 50 cmd += 10; 51 /* fall-through */ 52 case SETVAL: 53 case GETALL: 54 case SETALL: 55 return (_syscall(SYS_semsys, SEMCTL, 56 semid, semnum, cmd, arg->val)); 57 58 case IPC_RMID: 59 cmd += 10; 60 /* fall-through */ 61 default: 62 return (_syscall(SYS_semsys, SEMCTL, 63 semid, semnum, cmd, 0)); 64 } 65 } 66 67 int 68 semget(key_t key, int nsems, int semflg) 69 { 70 return (_syscall(SYS_semsys, SEMGET, key, nsems, semflg)); 71 } 72 73 int 74 semop(int semid, struct sembuf *sops, int nsops) 75 { 76 return (_syscall(SYS_semsys, SEMOP, semid, sops, nsops)); 77 } 78 79 int 80 semsys(int sysnum, ...) 81 { 82 va_list ap; 83 int semid, cmd; 84 int semnum, val; 85 union semun arg; 86 key_t key; 87 int nsems, semflg; 88 struct sembuf *sops; 89 int nsops; 90 91 va_start(ap, sysnum); 92 switch (sysnum) { 93 case SEMCTL: 94 semid = va_arg(ap, int); 95 semnum = va_arg(ap, int); 96 cmd = va_arg(ap, int); 97 val = va_arg(ap, int); 98 if ((cmd == IPC_STAT) || (cmd == IPC_SET) || (cmd == IPC_RMID)) 99 cmd += 10; 100 va_end(ap); 101 return (_syscall(SYS_semsys, SEMCTL, semid, semnum, cmd, val)); 102 case SEMGET: 103 key = va_arg(ap, key_t); 104 nsems = va_arg(ap, int); 105 semflg = va_arg(ap, int); 106 va_end(ap); 107 return (semget(key, nsems, semflg)); 108 case SEMOP: 109 semid = va_arg(ap, int); 110 sops = va_arg(ap, struct sembuf *); 111 nsops = va_arg(ap, int); 112 va_end(ap); 113 return (semop(semid, sops, nsops)); 114 } 115 va_end(ap); 116 return (-1); 117 } 118