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Annotation of sys/sys/ipc.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: ipc.h,v 1.10 2004/07/15 11:24:46 millert 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: struct ipc_perm {
        !            52:        uid_t           cuid;   /* creator user id */
        !            53:        gid_t           cgid;   /* creator group id */
        !            54:        uid_t           uid;    /* user id */
        !            55:        gid_t           gid;    /* group id */
        !            56:        mode_t          mode;   /* r/w permission */
        !            57:        unsigned short  seq;    /* sequence # (to generate unique msg/sem/shm id) */
        !            58:        key_t           key;    /* user specified msg/sem/shm key */
        !            59: };
        !            60:
        !            61: #ifdef _KERNEL
        !            62: struct ipc_perm23 {
        !            63:        unsigned short  cuid;   /* creator user id */
        !            64:        unsigned short  cgid;   /* creator group id */
        !            65:        unsigned short  uid;    /* user id */
        !            66:        unsigned short  gid;    /* group id */
        !            67:        unsigned short  mode;   /* r/w permission */
        !            68:        unsigned short  seq;    /* sequence # (to generate unique msg/sem/shm id) */
        !            69:        key_t           key;    /* user specified msg/sem/shm key */
        !            70: };
        !            71:
        !            72: struct ipc_perm35 {
        !            73:        uid_t           cuid;   /* creator user id */
        !            74:        gid_t           cgid;   /* creator group id */
        !            75:        uid_t           uid;    /* user id */
        !            76:        gid_t           gid;    /* group id */
        !            77:        u_int16_t       mode;   /* r/w permission */
        !            78:        unsigned short  seq;    /* sequence # (to generate unique msg/sem/shm id) */
        !            79:        key_t           key;    /* user specified msg/sem/shm key */
        !            80: };
        !            81: #endif
        !            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: int ipcperm(struct ucred *, struct ipc_perm *, int);
        !           106:
        !           107: #else /* !_KERNEL */
        !           108:
        !           109: #include <sys/cdefs.h>
        !           110:
        !           111: __BEGIN_DECLS
        !           112: key_t  ftok(const char *, int);
        !           113: __END_DECLS
        !           114: #endif
        !           115: #endif /* !_SYS_IPC_H_ */