1 /* $NetBSD: semctl.c,v 1.18 2015/01/29 20:44:38 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 1.18 2015/01/29 20:44:38 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 *] */ 45 int ____semctl50(int, int, int, ...); 46 47 int 48 semctl(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