usr/src/sys/sys/ipc.h

/*
 * Copyright (c) 1988 University of Utah.
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * the Systems Programming Group of the University of Utah Computer
 * Science Department.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      @(#)ipc.h       7.2 (Berkeley) 2/5/91
 */

/*
 * SVID compatible ipc.h file
 */
#ifndef _IPC_H_
#define _IPC_H_

typedef long    key_t;  /* XXX should be in types.h */

struct ipc_perm {
        ushort  cuid;   /* creator user id */
        ushort  cgid;   /* creator group id */
        ushort  uid;    /* user id */
        ushort  gid;    /* group id */
        ushort  mode;   /* r/w permission */
        ushort  seq;    /* sequence # (to generate unique msg/sem/shm id) */
        key_t   key;    /* user specified msg/sem/shm key */
};

/* common mode bits */
#define IPC_R           00400   /* read permission */
#define IPC_W           00200   /* write/alter permission */

/* SVID required constants (same values as system 5) */
#define IPC_CREAT       01000   /* create entry if key does not exist */
#define IPC_EXCL        02000   /* fail if key exists */
#define IPC_NOWAIT      04000   /* error if request must wait */

#define IPC_PRIVATE     (key_t)0 /* private key */

#define IPC_RMID        0       /* remove identifier */
#define IPC_SET         1       /* set options */
#define IPC_STAT        2       /* get options */

#endif /* !_IPC_H_ */