minix/lib/libc/compat/sys/compat_semctl.c

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/* $NetBSD: compat_semctl.c,v 1.3 2011/01/31 22:51:39 christos Exp $ */
/*
* Copyright (c) 1994, 1995 Christopher G. Demetriou
* All rights reserved.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the
* NetBSD Project. See http://www.NetBSD.org/ for
* information about NetBSD.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* <<Id: LICENSE,v 1.2 2000/06/14 15:57:33 cgd Exp>>
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: compat_semctl.c,v 1.3 2011/01/31 22:51:39 christos Exp $");
#endif /* LIBC_SCCS and not lint */
#define __LIBC12_SOURCE__
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>
#include <sys/null.h>
#include <compat/sys/sem.h>
#include <stdarg.h>
int
semctl(int semid, int semnum, int cmd, ...)
{
va_list ap;
union __semun semun;
struct semid_ds ds;
struct semid_ds14 *ds14;
int error;
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
break;
default:
break;
}
va_end(ap);
switch (cmd) {
case IPC_SET:
case IPC_STAT:
ds14 = (void *)semun.buf;
if (cmd == IPC_SET)
__semid_ds14_to_native(ds14, &ds);
semun.buf = &ds;
break;
default:
ds14 = NULL;
break;
}
error = __semctl50(semid, semnum, cmd, &semun);
if (error)
return error;
if (cmd == IPC_STAT)
__native_to_semid_ds14(&ds, ds14);
return 0;
}