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Annotation of Net2/sys/ipc.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1988 University of Utah.
        !             3:  * Copyright (c) 1990 The Regents of the University of California.
        !             4:  * All rights reserved.
        !             5:  *
        !             6:  * This code is derived from software contributed to Berkeley by
        !             7:  * the Systems Programming Group of the University of Utah Computer
        !             8:  * Science Department.
        !             9:  *
        !            10:  * Redistribution and use in source and binary forms, with or without
        !            11:  * modification, are permitted provided that the following conditions
        !            12:  * are met:
        !            13:  * 1. Redistributions of source code must retain the above copyright
        !            14:  *    notice, this list of conditions and the following disclaimer.
        !            15:  * 2. Redistributions in binary form must reproduce the above copyright
        !            16:  *    notice, this list of conditions and the following disclaimer in the
        !            17:  *    documentation and/or other materials provided with the distribution.
        !            18:  * 3. All advertising materials mentioning features or use of this software
        !            19:  *    must display the following acknowledgement:
        !            20:  *     This product includes software developed by the University of
        !            21:  *     California, Berkeley and its contributors.
        !            22:  * 4. Neither the name of the University nor the names of its contributors
        !            23:  *    may be used to endorse or promote products derived from this software
        !            24:  *    without specific prior written permission.
        !            25:  *
        !            26:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            27:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            28:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            29:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            30:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            31:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            32:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            33:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            34:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            35:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            36:  * SUCH DAMAGE.
        !            37:  *
        !            38:  *     @(#)ipc.h       7.2 (Berkeley) 2/5/91
        !            39:  */
        !            40: 
        !            41: /*
        !            42:  * SVID compatible ipc.h file
        !            43:  */
        !            44: #ifndef _IPC_H_
        !            45: #define _IPC_H_
        !            46: 
        !            47: typedef        long    key_t;  /* XXX should be in types.h */
        !            48: 
        !            49: struct ipc_perm {
        !            50:        ushort  cuid;   /* creator user id */
        !            51:        ushort  cgid;   /* creator group id */
        !            52:        ushort  uid;    /* user id */
        !            53:        ushort  gid;    /* group id */
        !            54:        ushort  mode;   /* r/w permission */
        !            55:        ushort  seq;    /* sequence # (to generate unique msg/sem/shm id) */
        !            56:        key_t   key;    /* user specified msg/sem/shm key */
        !            57: };
        !            58: 
        !            59: /* common mode bits */
        !            60: #define        IPC_R           00400   /* read permission */
        !            61: #define        IPC_W           00200   /* write/alter permission */
        !            62: 
        !            63: /* SVID required constants (same values as system 5) */
        !            64: #define        IPC_CREAT       01000   /* create entry if key does not exist */
        !            65: #define        IPC_EXCL        02000   /* fail if key exists */
        !            66: #define        IPC_NOWAIT      04000   /* error if request must wait */
        !            67: 
        !            68: #define        IPC_PRIVATE     (key_t)0 /* private key */
        !            69: 
        !            70: #define        IPC_RMID        0       /* remove identifier */
        !            71: #define        IPC_SET         1       /* set options */
        !            72: #define        IPC_STAT        2       /* get options */
        !            73: 
        !            74: #endif /* !_IPC_H_ */

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