226 lines
8.7 KiB
C
226 lines
8.7 KiB
C
/*
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* Copyright (c) 2000-2007 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/* $NetBSD: msg.h,v 1.4 1994/06/29 06:44:43 cgd Exp $ */
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/*
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* SVID compatible msg.h file
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*
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* Author: Daniel Boulet
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*
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* Copyright 1993 Daniel Boulet and RTMX Inc.
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*
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* This system call was implemented by Daniel Boulet under contract from RTMX.
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*
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* Redistribution and use in source forms, with and without modification,
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* are permitted provided that this entire comment appears intact.
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*
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* Redistribution in binary form may occur without any restrictions.
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* Obviously, it would be nice if you gave credit where credit is due
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* but requiring it would be too onerous.
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*
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* This software is provided ``AS IS'' without any warranties of any kind.
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*/
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/*
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* NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
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* support for mandatory and extensible security protections. This notice
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* is included in support of clause 2.2 (b) of the Apple Public License,
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* Version 2.0.
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*/
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#ifndef _SYS_MSG_H_
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#define _SYS_MSG_H_
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#include <sys/appleapiopts.h>
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#include <sys/_types.h>
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#include <sys/cdefs.h>
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/*
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* [XSI] All of the symbols from <sys/ipc.h> SHALL be defined when this
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* header is included
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*/
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#include <sys/ipc.h>
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/*
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* [XSI] The pid_t, time_t, key_t, size_t, and ssize_t types shall be
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* defined as described in <sys/types.h>.
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*
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* NOTE: The definition of the key_t type is implicit from the
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* inclusion of <sys/ipc.h>
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*/
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#include <sys/_types/_pid_t.h>
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#include <sys/_types/_time_t.h>
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#include <sys/_types/_size_t.h>
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#include <sys/_types/_ssize_t.h>
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/* [XSI] Used for the number of messages in the message queue */
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typedef unsigned long msgqnum_t;
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/* [XSI] Used for the number of bytes allowed in a message queue */
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typedef unsigned long msglen_t;
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/*
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* Possible values for the fifth parameter to msgrcv(), in addition to the
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* IPC_NOWAIT flag, which is permitted.
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*/
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#define MSG_NOERROR 010000 /* [XSI] No error if big message */
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/*
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* Technically, we should force all code references to the new structure
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* definition, not in just the standards conformance case, and leave the
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* legacy interface there for binary compatibility only. Currently, we
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* are only forcing this for programs requesting standards conformance.
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*/
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#if __DARWIN_UNIX03 || defined(KERNEL)
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#pragma pack(4)
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/*
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* Structure used internally.
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*
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* Structure whose address is passed as the third parameter to msgctl()
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* when the second parameter is IPC_SET or IPC_STAT. In the case of the
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* IPC_SET command, only the msg_perm.{uid|gid|perm} and msg_qbytes are
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* honored. In the case of IPC_STAT, only the fields indicated as [XSI]
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* mandated fields are guaranteed to meaningful: DO NOT depend on the
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* contents of the other fields.
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*
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* NOTES: Reserved fields are not preserved across IPC_SET/IPC_STAT.
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*/
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#if (defined(_POSIX_C_SOURCE) && !defined(_DARWIN_C_SOURCE))
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struct msqid_ds
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#else
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#define msqid_ds __msqid_ds_new
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struct __msqid_ds_new
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#endif
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{
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struct __ipc_perm_new msg_perm; /* [XSI] msg queue permissions */
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__int32_t msg_first; /* RESERVED: kernel use only */
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__int32_t msg_last; /* RESERVED: kernel use only */
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msglen_t msg_cbytes; /* # of bytes on the queue */
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msgqnum_t msg_qnum; /* [XSI] number of msgs on the queue */
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msglen_t msg_qbytes; /* [XSI] max bytes on the queue */
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pid_t msg_lspid; /* [XSI] pid of last msgsnd() */
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pid_t msg_lrpid; /* [XSI] pid of last msgrcv() */
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time_t msg_stime; /* [XSI] time of last msgsnd() */
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__int32_t msg_pad1; /* RESERVED: DO NOT USE */
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time_t msg_rtime; /* [XSI] time of last msgrcv() */
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__int32_t msg_pad2; /* RESERVED: DO NOT USE */
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time_t msg_ctime; /* [XSI] time of last msgctl() */
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__int32_t msg_pad3; /* RESERVED: DO NOT USE */
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__int32_t msg_pad4[4]; /* RESERVED: DO NOT USE */
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};
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#pragma pack()
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#else /* !__DARWIN_UNIX03 */
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#define msqid_ds __msqid_ds_old
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#endif /* !__DARWIN_UNIX03 */
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#if !__DARWIN_UNIX03
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struct __msqid_ds_old {
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struct __ipc_perm_old msg_perm; /* [XSI] msg queue permissions */
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__int32_t msg_first; /* RESERVED: kernel use only */
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__int32_t msg_last; /* RESERVED: kernel use only */
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msglen_t msg_cbytes; /* # of bytes on the queue */
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msgqnum_t msg_qnum; /* [XSI] number of msgs on the queue */
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msglen_t msg_qbytes; /* [XSI] max bytes on the queue */
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pid_t msg_lspid; /* [XSI] pid of last msgsnd() */
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pid_t msg_lrpid; /* [XSI] pid of last msgrcv() */
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time_t msg_stime; /* [XSI] time of last msgsnd() */
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__int32_t msg_pad1; /* RESERVED: DO NOT USE */
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time_t msg_rtime; /* [XSI] time of last msgrcv() */
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__int32_t msg_pad2; /* RESERVED: DO NOT USE */
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time_t msg_ctime; /* [XSI] time of last msgctl() */
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__int32_t msg_pad3; /* RESERVED: DO NOT USE */
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__int32_t msg_pad4[4]; /* RESERVED: DO NOT USE */
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};
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#endif /* !__DARWIN_UNIX03 */
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#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
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#ifdef __APPLE_API_UNSTABLE
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/* XXX kernel only; protect with macro later */
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struct msg {
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struct msg *msg_next; /* next msg in the chain */
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long msg_type; /* type of this message */
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/* >0 -> type of this message */
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/* 0 -> free header */
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unsigned short msg_ts; /* size of this message */
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short msg_spot; /* location of msg start in buffer */
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struct label *label; /* MAC label */
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};
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/*
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* Example structure describing a message whose address is to be passed as
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* the second argument to the functions msgrcv() and msgsnd(). The only
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* actual hard requirement is that the first field be of type long, and
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* contain the message type. The user is encouraged to define their own
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* application specific structure; this definition is included solely for
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* backward compatability with existing source code.
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*/
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struct mymsg {
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long mtype; /* message type (+ve integer) */
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char mtext[1]; /* message body */
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};
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/*
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* Based on the configuration parameters described in an SVR2 (yes, two)
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* config(1m) man page.
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*
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* Each message is broken up and stored in segments that are msgssz bytes
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* long. For efficiency reasons, this should be a power of two. Also,
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* it doesn't make sense if it is less than 8 or greater than about 256.
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* Consequently, msginit in kern/sysv_msg.c checks that msgssz is a power of
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* two between 8 and 1024 inclusive (and panic's if it isn't).
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*/
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struct msginfo {
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int msgmax, /* max chars in a message */
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msgmni, /* max message queue identifiers */
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msgmnb, /* max chars in a queue */
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msgtql, /* max messages in system */
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msgssz, /* size of a message segment (see notes above) */
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msgseg; /* number of message segments */
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};
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#endif /* __APPLE_API_UNSTABLE */
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#endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
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__BEGIN_DECLS
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#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
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int msgsys(int, ...);
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#endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
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int msgctl(int, int, struct msqid_ds *) __DARWIN_ALIAS(msgctl);
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int msgget(key_t, int);
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ssize_t msgrcv(int, void *, size_t, long, int) __DARWIN_ALIAS_C(msgrcv);
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int msgsnd(int, const void *, size_t, int) __DARWIN_ALIAS_C(msgsnd);
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__END_DECLS
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#endif /* !_SYS_MSG_H_ */
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