source: branches/libc-0.6/src/emx/include/sys/ipc.h

/*
 * Copyright (c) 1988 University of Utah.
 * Copyright (c) 1990, 1993
 *      The Regents of the University of California.  All rights reserved.
 * (c) UNIX System Laboratories, Inc.
 * All or some portions of this file are derived from material licensed
 * to the University of California by American Telephone and Telegraph
 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
 * the permission of UNIX System Laboratories, Inc.
 *
 * 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.
 * 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       8.4 (Berkeley) 2/19/95
 * $FreeBSD: src/sys/sys/ipc.h,v 1.24 2004/04/07 04:19:49 imp Exp $
 */

/** @file
 * FreeBSD 5.3
 * @changed     bird: Since we don't have any legacy, use correct types.
 * @todo        emx: #define IPC_ALLOC 0x8000
 */

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

#include <sys/cdefs.h>
#include <sys/_types.h>

#ifndef _GID_T_DECLARED
typedef __gid_t         gid_t;
#define _GID_T_DECLARED
#endif

#ifndef _KEY_T_DECLARED
typedef __key_t         key_t;
#define _KEY_T_DECLARED
#endif

#ifndef _MODE_T_DECLARED
typedef __mode_t        mode_t;
#define _MODE_T_DECLARED
#endif

#ifndef _UID_T_DECLARED
typedef __uid_t         uid_t;
#define _UID_T_DECLARED
#endif

#ifndef __EMX__
/*
 * XXX almost all members have wrong types.
 */
#endif
struct ipc_perm {
#ifdef __EMX__
        uid_t   cuid;   /* creator user id */
        gid_t   cgid;   /* creator group id */
        uid_t   uid;    /* user id */
        gid_t   gid;    /* group id */
        mode_t  mode;   /* r/w permission */
#else
        unsigned short  cuid;   /* creator user id */
        unsigned short  cgid;   /* creator group id */
        unsigned short  uid;    /* user id */
        unsigned short  gid;    /* group id */
        unsigned short  mode;   /* r/w permission */
#endif
        unsigned short  seq;    /* sequence # (to generate unique ipcid) */
        key_t           key;    /* user specified msg/sem/shm key */
};

#if __BSD_VISIBLE
/* common mode bits */
#define IPC_R           000400  /* read permission */
#define IPC_W           000200  /* write/alter permission */
#define IPC_M           010000  /* permission to change control info */
#endif

/* SVID required constants (same values as system 5) */
#define IPC_CREAT       001000  /* create entry if key does not exist */
#define IPC_EXCL        002000  /* fail if key exists */
#define IPC_NOWAIT      004000  /* 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 */
#if __BSD_VISIBLE
#define IPC_INFO        3       /* get info */
#endif

#ifdef _KERNEL
/* Macros to convert between ipc ids and array indices or sequence ids */
#define IPCID_TO_IX(id)         ((id) & 0xffff)
#define IPCID_TO_SEQ(id)        (((id) >> 16) & 0xffff)
#define IXSEQ_TO_IPCID(ix,perm) (((perm.seq) << 16) | (ix & 0xffff))

#ifdef __EMX__
int     __libc_back_ipcperm(struct ipc_perm *, int);
#else /* !__EMX__ */
struct thread;
struct proc;
struct vmspace;

int     ipcperm(struct thread *, struct ipc_perm *, int);
extern void (*shmfork_hook)(struct proc *, struct proc *);
extern void (*shmexit_hook)(struct vmspace *);
#endif /* !__EMX__ */

#else /* ! _KERNEL */

__BEGIN_DECLS
key_t   ftok(const char *, int);
__END_DECLS

#endif /* _KERNEL */

#endif /* !_SYS_IPC_H_ */