146 lines
5.0 KiB
C
146 lines
5.0 KiB
C
/* $NetBSD: ipc.h,v 1.23 2000/06/02 15:53:05 simonb Exp $ */
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/*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)ipc.h 8.4 (Berkeley) 2/19/95
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*/
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/*
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* SVID compatible ipc.h file
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*/
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#ifndef _SYS_IPC_H_
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#define _SYS_IPC_H_
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#include <sys/types.h>
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struct ipc_perm {
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uid_t uid; /* user id */
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gid_t gid; /* group id */
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uid_t cuid; /* creator user id */
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gid_t cgid; /* creator group id */
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mode_t mode; /* r/w permission */
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/*
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* These members are private and used only in the internal
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* implementation of this interface.
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*/
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unsigned short _seq; /* sequence # (to generate unique
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msg/sem/shm id) */
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key_t _key; /* user specified msg/sem/shm key */
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};
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#if !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE)
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/* Warning: 64-bit structure padding is needed here */
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struct ipc_perm_sysctl {
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u_int64_t _key;
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uid_t uid;
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gid_t gid;
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uid_t cuid;
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gid_t cgid;
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mode_t mode;
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int16_t _seq;
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int16_t pad;
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};
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#endif /* !_POSIX_C_SOURCE && !_XOPEN_SOURCE */
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#ifdef _KERNEL
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/*
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* Old IPC permission structure used before NetBSD 1.5.
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*/
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struct ipc_perm14 {
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unsigned short cuid; /* creator user id */
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unsigned short cgid; /* creator group id */
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unsigned short uid; /* user id */
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unsigned short gid; /* group id */
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unsigned short mode; /* r/w permission */
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unsigned short seq; /* sequence # (to generate unique
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msg/sem/shm id) */
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key_t key; /* user specified msg/sem/shm key */
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};
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#endif /* _KERNEL */
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/* X/Open required constants (same values as system 5) */
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#define IPC_CREAT 001000 /* create entry if key does not exist */
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#define IPC_EXCL 002000 /* fail if key exists */
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#define IPC_NOWAIT 004000 /* error if request must wait */
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#define IPC_PRIVATE (key_t)0 /* private key */
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#define IPC_RMID 0 /* remove identifier */
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#define IPC_SET 1 /* set options */
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#define IPC_STAT 2 /* get options */
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/*
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* Macros to convert between ipc ids and array indices or sequence ids.
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* The first of these is used by ipcs(1), and so is defined outside the
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* kernel as well.
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*/
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#if !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE)
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#define IXSEQ_TO_IPCID(ix,perm) (((perm._seq) << 16) | (ix & 0xffff))
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#endif
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#ifdef _KERNEL
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#define IPCID_TO_IX(id) ((id) & 0xffff)
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#define IPCID_TO_SEQ(id) (((id) >> 16) & 0xffff)
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/* Common access type bits, used with ipcperm(). */
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#define IPC_R 000400 /* read permission */
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#define IPC_W 000200 /* write/alter permission */
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#define IPC_M 010000 /* permission to change control info */
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int ipcperm __P((struct ucred *, struct ipc_perm *, int));
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void ipc_perm14_to_native __P((struct ipc_perm14 *, struct ipc_perm *));
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void native_to_ipc_perm14 __P((struct ipc_perm *, struct ipc_perm14 *));
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#endif /* _KERNEL */
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#ifndef _KERNEL
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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key_t ftok __P((const char *, int));
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__END_DECLS
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#endif
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#endif /* !_SYS_IPC_H_ */
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