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/* $NetBSD: ipc.h,v 1.37 2018/06/23 07:23:06 gson Exp $ */
/*
* 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.
* 3. 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
*/
/*
* SVID compatible ipc.h file
*/
#ifndef _SYS_IPC_H_
#define _SYS_IPC_H_
#include <sys/featuretest.h>
#include <sys/types.h>
struct ipc_perm {
uid_t uid; /* user id */
gid_t gid; /* group id */
uid_t cuid; /* creator user id */
gid_t cgid; /* creator group id */
mode_t mode; /* r/w permission */
/*
* These members are private and used only in the internal
* implementation of this interface.
*/
unsigned short _seq; /* sequence # (to generate unique
msg/sem/shm id) */
key_t _key; /* user specified msg/sem/shm key */
};
#if defined(_NETBSD_SOURCE)
/* Warning: 64-bit structure padding is needed here */
struct ipc_perm_sysctl {
uint64_t _key;
uid_t uid;
gid_t gid;
uid_t cuid;
gid_t cgid;
mode_t mode;
int16_t _seq;
int16_t pad;
};
#endif /* _NETBSD_SOURCE */
/* Common access type bits, used with ipcperm(). */
#define IPC_R 000400 /* read permission */
#define IPC_W 000200 /* write/alter permission */
#define IPC_M 010000 /* permission to change control info */
/* X/Open 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 */
/*
* Macros to convert between ipc ids and array indices or sequence ids.
* The first of these is used by ipcs(1), and so is defined outside the
* kernel as well.
*/
#if defined(_NETBSD_SOURCE)
#define IXSEQ_TO_IPCID(ix,perm) (((perm._seq) << 16) | (ix & 0xffff))
#endif
#ifdef _KERNEL
#include <sys/sysctl.h>
#define IPCID_TO_IX(id) ((id) & 0xffff)
#define IPCID_TO_SEQ(id) (((id) >> 16) & 0xffff)
struct kauth_cred;
__BEGIN_DECLS
int ipcperm(struct kauth_cred *, struct ipc_perm *, int);
void sysvipcinit(void);
void sysvipcfini(void);
__END_DECLS
/*
* sysctl helper routine for kern.ipc.sysvipc_info subtree.
*/
#define SYSCTL_FILL_PERM(src, dst) do { \
(dst)._key = (src)._key; \
(dst).uid = (src).uid; \
(dst).gid = (src).gid; \
(dst).cuid = (src).cuid; \
(dst).cgid = (src).cgid; \
(dst).mode = (src).mode; \
(dst)._seq = (src)._seq; \
} while (/*CONSTCOND*/ 0)
/*
* Set-up the sysctl routine for COMPAT_50
*/
__BEGIN_DECLS
void sysvipc50_set_compat_sysctl(int (*)(SYSCTLFN_PROTO));
__END_DECLS
#else /* _KERNEL */
__BEGIN_DECLS
key_t ftok(const char *, int);
__END_DECLS
#endif
#endif /* !_SYS_IPC_H_ */
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