1 /* $OpenBSD: ipc.h,v 1.13 2014/11/15 21:42:50 guenther Exp $ */ 2 /* $NetBSD: ipc.h,v 1.15 1996/02/09 18:25:12 christos Exp $ */ 3 4 /* 5 * Copyright (c) 1988 University of Utah. 6 * Copyright (c) 1990, 1993 7 * The Regents of the University of California. All rights reserved. 8 * (c) UNIX System Laboratories, Inc. 9 * All or some portions of this file are derived from material licensed 10 * to the University of California by American Telephone and Telegraph 11 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 12 * the permission of UNIX System Laboratories, Inc. 13 * 14 * This code is derived from software contributed to Berkeley by 15 * the Systems Programming Group of the University of Utah Computer 16 * Science Department. 17 * 18 * Redistribution and use in source and binary forms, with or without 19 * modification, are permitted provided that the following conditions 20 * are met: 21 * 1. Redistributions of source code must retain the above copyright 22 * notice, this list of conditions and the following disclaimer. 23 * 2. Redistributions in binary form must reproduce the above copyright 24 * notice, this list of conditions and the following disclaimer in the 25 * documentation and/or other materials provided with the distribution. 26 * 3. Neither the name of the University nor the names of its contributors 27 * may be used to endorse or promote products derived from this software 28 * without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 40 * SUCH DAMAGE. 41 * 42 * @(#)ipc.h 8.3 (Berkeley) 1/21/94 43 */ 44 45 /* 46 * SVID compatible ipc.h file 47 */ 48 #ifndef _SYS_IPC_H_ 49 #define _SYS_IPC_H_ 50 51 #include <sys/types.h> 52 53 struct ipc_perm { 54 uid_t cuid; /* creator user id */ 55 gid_t cgid; /* creator group id */ 56 uid_t uid; /* user id */ 57 gid_t gid; /* group id */ 58 mode_t mode; /* r/w permission */ 59 unsigned short seq; /* sequence # (to generate unique msg/sem/shm id) */ 60 key_t key; /* user specified msg/sem/shm key */ 61 }; 62 63 /* common mode bits */ 64 #define IPC_R 000400 /* read permission */ 65 #define IPC_W 000200 /* write/alter permission */ 66 #define IPC_M 010000 /* permission to change control info */ 67 68 /* SVID required constants (same values as system 5) */ 69 #define IPC_CREAT 001000 /* create entry if key does not exist */ 70 #define IPC_EXCL 002000 /* fail if key exists */ 71 #define IPC_NOWAIT 004000 /* error if request must wait */ 72 73 #define IPC_PRIVATE (key_t)0 /* private key */ 74 75 #define IPC_RMID 0 /* remove identifier */ 76 #define IPC_SET 1 /* set options */ 77 #define IPC_STAT 2 /* get options */ 78 79 #ifdef _KERNEL 80 /* Macros to convert between ipc ids and array indices or sequence ids */ 81 #define IPCID_TO_IX(id) ((id) & 0xffff) 82 #define IPCID_TO_SEQ(id) (((id) >> 16) & 0xffff) 83 #define IXSEQ_TO_IPCID(ix,perm) (((perm.seq) << 16) | (ix & 0xffff)) 84 85 struct ucred; 86 87 int ipcperm(struct ucred *, struct ipc_perm *, int); 88 89 #else /* !_KERNEL */ 90 91 __BEGIN_DECLS 92 key_t ftok(const char *, int); 93 __END_DECLS 94 #endif 95 #endif /* !_SYS_IPC_H_ */ 96