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/* $OpenBSD: semctl.c,v 1.9 2015/09/14 12:08:22 guenther Exp $ */ |
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/* |
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* Copyright (c) 1994, 1995 Christopher G. Demetriou |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. All advertising materials mentioning features or use of this software |
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* must display the following acknowledgement: |
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* This product includes software developed by Christopher G. Demetriou |
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* for the NetBSD Project. |
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* 4. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include <sys/sem.h> |
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#include <stdarg.h> |
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#include <stdlib.h> |
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int |
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semctl(int semid, int semnum, int cmd, ...) |
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{ |
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va_list ap; |
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union semun semun; |
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union semun *semun_ptr = NULL; |
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va_start(ap, cmd); |
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if (cmd == IPC_SET || cmd == IPC_STAT || cmd == GETALL || |
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cmd == SETVAL || cmd == SETALL) { |
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semun = va_arg(ap, union semun); |
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semun_ptr = &semun; |
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} |
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va_end(ap); |
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return (__semctl(semid, semnum, cmd, semun_ptr)); |
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} |