1 /* 2 * Copyright (c) 1988 University of Utah. 3 * Copyright (c) 1990, 1993 4 * The Regents of the University of California. All rights reserved. 5 * (c) UNIX System Laboratories, Inc. 6 * All or some portions of this file are derived from material licensed 7 * to the University of California by American Telephone and Telegraph 8 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 9 * the permission of UNIX System Laboratories, Inc. 10 * 11 * This code is derived from software contributed to Berkeley by 12 * the Systems Programming Group of the University of Utah Computer 13 * Science Department. 14 * 15 * Redistribution and use in source and binary forms, with or without 16 * modification, are permitted provided that the following conditions 17 * are met: 18 * 1. Redistributions of source code must retain the above copyright 19 * notice, this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in the 22 * documentation and/or other materials provided with the distribution. 23 * 3. All advertising materials mentioning features or use of this software 24 * must display the following acknowledgement: 25 * This product includes software developed by the University of 26 * California, Berkeley and its contributors. 27 * 4. Neither the name of the University nor the names of its contributors 28 * may be used to endorse or promote products derived from this software 29 * without specific prior written permission. 30 * 31 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 32 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 33 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 34 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 35 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 39 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 40 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 41 * SUCH DAMAGE. 42 * 43 * @(#)ipc.h 8.4 (Berkeley) 2/19/95 44 * $FreeBSD: src/sys/sys/ipc.h,v 1.15 1999/12/29 04:24:43 peter Exp $ 45 * $DragonFly: src/sys/sys/ipc.h,v 1.5 2006/05/20 02:42:13 dillon Exp $ 46 */ 47 48 /* 49 * SVID compatible ipc.h file 50 */ 51 #ifndef _SYS_IPC_H_ 52 #define _SYS_IPC_H_ 53 54 #ifndef _SYS_TYPES_H_ 55 #include <sys/types.h> 56 #endif 57 58 struct ipc_perm { 59 ushort cuid; /* creator user id */ 60 ushort cgid; /* creator group id */ 61 ushort uid; /* user id */ 62 ushort gid; /* group id */ 63 ushort mode; /* r/w permission */ 64 ushort seq; /* sequence # (to generate unique msg/sem/shm id) */ 65 key_t key; /* user specified msg/sem/shm key */ 66 }; 67 68 /* common mode bits */ 69 #define IPC_R 000400 /* read permission */ 70 #define IPC_W 000200 /* write/alter permission */ 71 #define IPC_M 010000 /* permission to change control info */ 72 73 /* SVID required constants (same values as system 5) */ 74 #define IPC_CREAT 001000 /* create entry if key does not exist */ 75 #define IPC_EXCL 002000 /* fail if key exists */ 76 #define IPC_NOWAIT 004000 /* error if request must wait */ 77 78 #define IPC_PRIVATE (key_t)0 /* private key */ 79 80 #define IPC_RMID 0 /* remove identifier */ 81 #define IPC_SET 1 /* set options */ 82 #define IPC_STAT 2 /* get options */ 83 84 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 85 86 /* Macros to convert between ipc ids and array indices or sequence ids */ 87 #define IPCID_TO_IX(id) ((id) & 0xffff) 88 #define IPCID_TO_SEQ(id) (((id) >> 16) & 0xffff) 89 #define IXSEQ_TO_IPCID(ix,perm) (((perm.seq) << 16) | (ix & 0xffff)) 90 91 struct proc; 92 93 #endif 94 95 #ifdef _KERNEL 96 97 int ipcperm (struct proc *, struct ipc_perm *, int); 98 99 #else /* ! _KERNEL */ 100 101 /* XXX doesn't really belong here, but has been historical practice in SysV. */ 102 103 #include <sys/cdefs.h> 104 105 __BEGIN_DECLS 106 key_t ftok (const char *, int); 107 __END_DECLS 108 109 #endif /* _KERNEL */ 110 111 #endif /* !_SYS_IPC_H_ */ 112