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 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * @(#)ipc.h 8.4 (Berkeley) 2/19/95 40 * $FreeBSD$ 41 */ 42 43 /* 44 * SVID compatible ipc.h file 45 */ 46 #ifndef _SYS_IPC_H_ 47 #define _SYS_IPC_H_ 48 49 #include <sys/cdefs.h> 50 #include <sys/_types.h> 51 52 #ifndef _GID_T_DECLARED 53 typedef __gid_t gid_t; 54 #define _GID_T_DECLARED 55 #endif 56 57 #ifndef _KEY_T_DECLARED 58 typedef __key_t key_t; 59 #define _KEY_T_DECLARED 60 #endif 61 62 #ifndef _MODE_T_DECLARED 63 typedef __mode_t mode_t; 64 #define _MODE_T_DECLARED 65 #endif 66 67 #ifndef _UID_T_DECLARED 68 typedef __uid_t uid_t; 69 #define _UID_T_DECLARED 70 #endif 71 72 /* 73 * XXX almost all members have wrong types. 74 */ 75 struct ipc_perm { 76 unsigned short cuid; /* creator user id */ 77 unsigned short cgid; /* creator group id */ 78 unsigned short uid; /* user id */ 79 unsigned short gid; /* group id */ 80 unsigned short mode; /* r/w permission */ 81 unsigned short seq; /* sequence # (to generate unique ipcid) */ 82 key_t key; /* user specified msg/sem/shm key */ 83 }; 84 85 #if __BSD_VISIBLE 86 /* common mode bits */ 87 #define IPC_R 000400 /* read permission */ 88 #define IPC_W 000200 /* write/alter permission */ 89 #define IPC_M 010000 /* permission to change control info */ 90 #endif 91 92 /* SVID required constants (same values as system 5) */ 93 #define IPC_CREAT 001000 /* create entry if key does not exist */ 94 #define IPC_EXCL 002000 /* fail if key exists */ 95 #define IPC_NOWAIT 004000 /* error if request must wait */ 96 97 #define IPC_PRIVATE (key_t)0 /* private key */ 98 99 #define IPC_RMID 0 /* remove identifier */ 100 #define IPC_SET 1 /* set options */ 101 #define IPC_STAT 2 /* get options */ 102 #if __BSD_VISIBLE 103 #define IPC_INFO 3 /* get info */ 104 #endif 105 106 #ifdef _KERNEL 107 /* Macros to convert between ipc ids and array indices or sequence ids */ 108 #define IPCID_TO_IX(id) ((id) & 0xffff) 109 #define IPCID_TO_SEQ(id) (((id) >> 16) & 0xffff) 110 #define IXSEQ_TO_IPCID(ix,perm) (((perm.seq) << 16) | (ix & 0xffff)) 111 112 struct thread; 113 struct proc; 114 struct vmspace; 115 116 int ipcperm(struct thread *, struct ipc_perm *, int); 117 extern void (*shmfork_hook)(struct proc *, struct proc *); 118 extern void (*shmexit_hook)(struct vmspace *); 119 120 #else /* ! _KERNEL */ 121 122 __BEGIN_DECLS 123 key_t ftok(const char *, int); 124 __END_DECLS 125 126 #endif /* _KERNEL */ 127 128 #endif /* !_SYS_IPC_H_ */ 129