bsd/sys/ipc.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * Copyright (c) 1988 University of Utah.
  24  * Copyright (c) 1990, 1993
  25  *      The Regents of the University of California.  All rights reserved.
  26  * (c) UNIX System Laboratories, Inc.
  27  * All or some portions of this file are derived from material licensed
  28  * to the University of California by American Telephone and Telegraph
  29  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  30  * the permission of UNIX System Laboratories, Inc.
  31  *
  32  * This code is derived from software contributed to Berkeley by
  33  * the Systems Programming Group of the University of Utah Computer
  34  * Science Department.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  * 1. Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  * 2. Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in the
  43  *    documentation and/or other materials provided with the distribution.
  44  * 3. All advertising materials mentioning features or use of this software
  45  *    must display the following acknowledgement:
  46  *      This product includes software developed by the University of
  47  *      California, Berkeley and its contributors.
  48  * 4. Neither the name of the University nor the names of its contributors
  49  *    may be used to endorse or promote products derived from this software
  50  *    without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  53  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  54  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  55  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  56  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  57  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  58  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  59  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  60  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  61  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  62  * SUCH DAMAGE.
  63  *
  64  *      @(#)ipc.h       8.4 (Berkeley) 2/19/95
  65  */
  66
  67 /*
  68  * SVID compatible ipc.h file
  69  */
  70 #ifndef _SYS_IPC_H_
  71 #define _SYS_IPC_H_
  72
  73 struct ipc_perm {
  74         ushort  cuid;   /* creator user id */
  75         ushort  cgid;   /* creator group id */
  76         ushort  uid;    /* user id */
  77         ushort  gid;    /* group id */
  78         ushort  mode;   /* r/w permission */
  79         ushort  seq;    /* sequence # (to generate unique msg/sem/shm id) */
  80         key_t   key;    /* user specified msg/sem/shm key */
  81 };
  82
  83 /* common mode bits */
  84 #define IPC_R           000400  /* read permission */
  85 #define IPC_W           000200  /* write/alter permission */
  86 #define IPC_M           010000  /* permission to change control info */
  87
  88 /* SVID required constants (same values as system 5) */
  89 #define IPC_CREAT       001000  /* create entry if key does not exist */
  90 #define IPC_EXCL        002000  /* fail if key exists */
  91 #define IPC_NOWAIT      004000  /* error if request must wait */
  92
  93 #define IPC_PRIVATE     (key_t)0 /* private key */
  94
  95 #define IPC_RMID        0       /* remove identifier */
  96 #define IPC_SET         1       /* set options */
  97 #define IPC_STAT        2       /* get options */
  98
  99 #ifdef KERNEL
 100 /* Macros to convert between ipc ids and array indices or sequence ids */
 101 #define IPCID_TO_IX(id)         ((id) & 0xffff)
 102 #define IPCID_TO_SEQ(id)        (((id) >> 16) & 0xffff)
 103 #define IXSEQ_TO_IPCID(ix,perm) (((perm.seq) << 16) | (ix & 0xffff))
 104
 105 struct ucred;
 106
 107 int     ipcperm __P((struct ucred *, struct ipc_perm *, int));
 108 #else /* ! KERNEL */
 109
 110 /* XXX doesn't really belong here, but has been historical practice in SysV. */
 111
 112 #include <sys/cdefs.h>
 113
 114 __BEGIN_DECLS
 115 key_t   ftok __P((const char *, int));
 116 __END_DECLS
 117
 118 #endif /* KERNEL */
 119
 120 #endif /* !_SYS_IPC_H_ */