xref: /src/lib/libc/sys/semctl.c

/*	$NetBSD: semctl.c,v 1.18 2015/01/29 20:44:38 joerg Exp $	*/

/*-
 * Copyright (c) 2000 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Christos Zoulas.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: semctl.c,v 1.18 2015/01/29 20:44:38 joerg Exp $");
#endif /* LIBC_SCCS and not lint */

#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>
#include <stdarg.h>
#ifdef __lint__
#include <string.h>
#endif

/* The kernel version [... == union semun *] */
int ____semctl50(int, int, int, ...);

int
semctl(int semid, int semnum, int cmd, ...)
{
	va_list ap;
	union __semun semun;

	va_start(ap, cmd);
	switch (cmd) {
	case IPC_SET:
	case IPC_STAT:
	case GETALL:
	case SETVAL:
	case SETALL:
#ifdef __lint__
		memcpy(&semun, &ap, sizeof(semun));
#else
		semun = va_arg(ap, union __semun);
#endif
	}
	va_end(ap);
	return ____semctl50(semid, semnum, cmd, &semun);
}