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
semctl(int semid,int semnum,int cmd,union semun * arg)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
semget(key_t key,int nsems,int semflg)68 semget(key_t key, int nsems, int semflg)
69 {
70 return (_syscall(SYS_semsys, SEMGET, key, nsems, semflg));
71 }
72
73 int
semop(int semid,struct sembuf * sops,int nsops)74 semop(int semid, struct sembuf *sops, int nsops)
75 {
76 return (_syscall(SYS_semsys, SEMOP, semid, sops, nsops));
77 }
78
79 int
semsys(int sysnum,...)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