semctl.c revision 1.16 
1/*	$NetBSD: semctl.c,v 1.16 2014/08/10 17:55:09 joerg Exp $	*/
2
3/*-
4 * Copyright (c) 2000 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Christos Zoulas.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31#include <sys/cdefs.h>
32#if defined(LIBC_SCCS) && !defined(lint)
33__RCSID("$NetBSD: semctl.c,v 1.16 2014/08/10 17:55:09 joerg Exp $");
34#endif /* LIBC_SCCS and not lint */
35
36#include <sys/types.h>
37#include <sys/ipc.h>
38#include <sys/sem.h>
39#include <stdarg.h>
40#ifdef __lint__
41#include <string.h>
42#endif
43
44/* The kernel version [... == union semun *] */
45int ____semctl50(int, int, int, ...);
46
47int
48semctl(int semid, int semnum, int cmd, ...)
49{
50	va_list ap;
51	union __semun semun;
52
53	va_start(ap, cmd);
54	switch (cmd) {
55	case IPC_SET:
56	case IPC_STAT:
57	case GETALL:
58	case SETVAL:
59	case SETALL:
60#ifdef __lint__
61		memcpy(&semun, &ap, sizeof(semun));
62#else
63		semun = va_arg(ap, union __semun);
64#endif
65	}
66	va_end(ap);
67	return ____semctl50(semid, semnum, cmd, &semun);
68}
69