compat_semctl.c revision 1.2 
1/* $NetBSD: compat_semctl.c,v 1.2 2009/01/11 02:46:26 christos Exp $ */
2
3/*
4 * Copyright (c) 1994, 1995 Christopher G. Demetriou
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *          This product includes software developed for the
18 *          NetBSD Project.  See http://www.NetBSD.org/ for
19 *          information about NetBSD.
20 * 4. The name of the author may not be used to endorse or promote products
21 *    derived from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 *
34 * <<Id: LICENSE,v 1.2 2000/06/14 15:57:33 cgd Exp>>
35 */
36
37#include <sys/cdefs.h>
38#if defined(LIBC_SCCS) && !defined(lint)
39__RCSID("$NetBSD: compat_semctl.c,v 1.2 2009/01/11 02:46:26 christos Exp $");
40#endif /* LIBC_SCCS and not lint */
41
42#define __LIBC12_SOURCE__
43#include <sys/types.h>
44#include <sys/ipc.h>
45#include <sys/sem.h>
46#include <sys/null.h>
47#include <compat/sys/sem.h>
48#include <stdarg.h>
49
50int
51semctl(int semid, int semnum, int cmd, ...)
52{
53	va_list ap;
54	union __semun semun;
55	struct semid_ds ds;
56	struct semid_ds14 *ds14 = NULL;
57	int error;
58
59	va_start(ap, cmd);
60	switch (cmd) {
61	case IPC_SET:
62	case IPC_STAT:
63	case GETALL:
64	case SETVAL:
65	case SETALL:
66#ifdef __lint__
67		memcpy(&semun, &ap, sizeof(semun));
68#else
69		semun = va_arg(ap, union __semun);
70#endif
71	}
72	va_end(ap);
73
74	switch (cmd) {
75	case IPC_SET:
76	case IPC_STAT:
77		ds14 = (struct semid_ds14 *)(void *)semun.buf;
78		if (cmd == IPC_SET)
79			__semid_ds14_to_native(ds14, &ds);
80		semun.buf = &ds;
81		break;
82	}
83
84	error = __semctl50(semid, semnum, cmd, &semun);
85	switch (cmd) {
86	case IPC_SET:
87	case IPC_STAT:
88		semun.buf = (struct semid_ds *)(void *)ds14;
89		if (cmd == IPC_STAT && error == 0)
90			__native_to_semid_ds14(&ds, ds14);
91		break;
92	}
93	return error;
94}
95