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      1 /* $NetBSD: compat_semctl.c,v 1.6 2015/01/29 20:44:38 joerg 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 1.6 2015/01/29 20:44:38 joerg 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 #ifdef __lint__
     50 #include <string.h>
     51 #endif
     52 
     53 int
     54 semctl(int semid, int semnum, int cmd, ...)
     55 {
     56 	va_list ap;
     57 	union __semun semun;
     58 	struct semid_ds ds;
     59 	struct semid_ds14 *ds14;
     60 	int error;
     61 
     62 	va_start(ap, cmd);
     63 	switch (cmd) {
     64 	case IPC_SET:
     65 	case IPC_STAT:
     66 	case GETALL:
     67 	case SETVAL:
     68 	case SETALL:
     69 #ifdef __lint__
     70 		memcpy(&semun, &ap, sizeof(semun));
     71 #else
     72 		semun = va_arg(ap, union __semun);
     73 #endif
     74 		break;
     75 	default:
     76 		break;
     77 	}
     78 	va_end(ap);
     79 
     80 	switch (cmd) {
     81 	case IPC_SET:
     82 	case IPC_STAT:
     83 		ds14 = (void *)semun.buf;
     84 		if (cmd == IPC_SET)
     85 			__semid_ds14_to_native(ds14, &ds);
     86 		semun.buf = &ds;
     87 		break;
     88 	default:
     89 		ds14 = NULL;
     90 		break;
     91 	}
     92 
     93 	error = __semctl50(semid, semnum, cmd, &semun);
     94 	if (error)
     95 		return error;
     96 
     97 	if (cmd == IPC_STAT)
     98 		__native_to_semid_ds14(&ds, ds14);
     99 	return 0;
    100 }
    101