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.\"
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.\" documentation.
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.\" of the system documentation.
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.\" Portions of this text are reprinted and reproduced in electronic form
.\" in the SunOS Reference Manual, from IEEE Std 1003.1, 2004 Edition,
.\" Standard for Information Technology -- Portable Operating System
.\" Interface (POSIX), The Open Group Base Specifications Issue 6,
.\" Copyright (C) 2001-2004 by the Institute of Electrical and Electronics
.\" Engineers, Inc and The Open Group. In the event of any discrepancy
.\" between these versions and the original IEEE and The Open Group
.\" Standard, the original IEEE and The Open Group Standard is the referee
.\" document. The original Standard can be obtained online at
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.\" The contents of this file are subject to the terms of the
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.\" If applicable, add the following below this CDDL HEADER, with the
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.\" Copyright (c) 2001, The IEEE and The Open Group. All Rights Reserved.
.\" Portions Copyright (c) 2004, Sun Microsystems, Inc. All Rights Reserved.
.\"
.TH IPC.H 3HEAD "Sep 10, 2004"
.SH NAME
ipc.h, ipc \- XSI interprocess communication access structure
.SH SYNOPSIS
.LP
.nf
#include <\fBsys/ipc.h\fR>
.fi
.SH DESCRIPTION
.sp
.LP
The <\fBsys/ipc.h\fR> header is used by three mechanisms for interprocess
communication (IPC): messages, semaphores, and shared memory. All use a common
structure type, \fBipc_perm\fR, to pass information used in determining
permission to perform an IPC operation.
.sp
.LP
The \fBipc_perm\fR structure contains the following members:
.sp
.in +2
.nf
uid_t uid /* owner's user ID */
gid_t gid /* owner's group ID */
uid_t cuid /* creator's user ID */
gid_t cgid /* creator's group ID */
mode_t mode /* read/write permission
.fi
.in -2
.sp
.LP
The \fBuid_t\fR, \fBgid_t\fR, \fBmode_t\fR, and \fBkey_t\fR types are defined
as described in <\fBsys/types.h\fR>. See \fBtypes.h\fR(3HEAD).
.sp
.LP
Definitions are provided for the constants listed below.
.sp
.LP
Mode bits:
.sp
.ne 2
.na
\fB\fBIPC_CREAT\fR\fR
.ad
.RS 14n
Create entry if key does not exist.
.RE
.sp
.ne 2
.na
\fB\fBIPC_EXCL\fR\fR
.ad
.RS 14n
Fail if key exists.
.RE
.sp
.ne 2
.na
\fB\fBIPC_NOWAIT\fR\fR
.ad
.RS 14n
Error if request must wait.
.RE
.sp
.LP
Keys:
.sp
.ne 2
.na
\fB\fBIPC_PRIVATE\fR\fR
.ad
.RS 15n
Private key.
.RE
.sp
.LP
Control commands:
.sp
.ne 2
.na
\fB\fBIPC_RMID\fR\fR
.ad
.RS 12n
Remove identifier.
.RE
.sp
.ne 2
.na
\fB\fBIPC_SET\fR\fR
.ad
.RS 12n
Set options.
.RE
.sp
.ne 2
.na
\fB\fBIPC_STAT\fR\fR
.ad
.RS 12n
Get options.
.RE
.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp
.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE ATTRIBUTE VALUE
_
Interface Stability Standard
.TE
.SH SEE ALSO
.sp
.LP
\fBftok\fR(3C), \fBtypes.h\fR(3HEAD), \fBattributes\fR(5), \fBstandards\fR(5)
|
