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.\" ========================================================================
.\"
.IX Title "IPC::SysV 3"
.TH IPC::SysV 3 "2012-11-03" "perl v5.12.5" "Perl Programmers Reference Guide"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
IPC::SysV \- System V IPC constants and system calls
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  use IPC::SysV qw(IPC_STAT IPC_PRIVATE);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\f(CW\*(C`IPC::SysV\*(C'\fR defines and conditionally exports all the constants
defined in your system include files which are needed by the SysV
\&\s-1IPC\s0 calls.  Common ones include
.PP
.Vb 4
\&  IPC_CREATE IPC_EXCL IPC_NOWAIT IPC_PRIVATE IPC_RMID IPC_SET IPC_STAT
\&  GETVAL SETVAL GETPID GETNCNT GETZCNT GETALL SETALL
\&  SEM_A SEM_R SEM_UNDO
\&  SHM_RDONLY SHM_RND SHMLBA
.Ve
.PP
and auxiliary ones
.PP
.Vb 3
\&  S_IRUSR S_IWUSR S_IRWXU
\&  S_IRGRP S_IWGRP S_IRWXG
\&  S_IROTH S_IWOTH S_IRWXO
.Ve
.PP
but your system might have more.
.IP "ftok( \s-1PATH\s0 )" 4
.IX Item "ftok( PATH )"
.PD 0
.IP "ftok( \s-1PATH\s0, \s-1ID\s0 )" 4
.IX Item "ftok( PATH, ID )"
.PD
Return a key based on \s-1PATH\s0 and \s-1ID\s0, which can be used as a key for
\&\f(CW\*(C`msgget\*(C'\fR, \f(CW\*(C`semget\*(C'\fR and \f(CW\*(C`shmget\*(C'\fR. See ftok.
.Sp
If \s-1ID\s0 is omitted, it defaults to \f(CW1\fR. If a single character is
given for \s-1ID\s0, the numeric value of that character is used.
.IP "shmat( \s-1ID\s0, \s-1ADDR\s0, \s-1FLAG\s0 )" 4
.IX Item "shmat( ID, ADDR, FLAG )"
Attach the shared memory segment identified by \s-1ID\s0 to the address
space of the calling process. See shmat.
.Sp
\&\s-1ADDR\s0 should be \f(CW\*(C`undef\*(C'\fR unless you really know what you're doing.
.IP "shmdt( \s-1ADDR\s0 )" 4
.IX Item "shmdt( ADDR )"
Detach the shared memory segment located at the address specified
by \s-1ADDR\s0 from the address space of the calling process. See shmdt.
.IP "memread( \s-1ADDR\s0, \s-1VAR\s0, \s-1POS\s0, \s-1SIZE\s0 )" 4
.IX Item "memread( ADDR, VAR, POS, SIZE )"
Reads \s-1SIZE\s0 bytes from a memory segment at \s-1ADDR\s0 starting at position \s-1POS\s0.
\&\s-1VAR\s0 must be a variable that will hold the data read. Returns true if
successful, or false if there is an error. \fImemread()\fR taints the variable.
.IP "memwrite( \s-1ADDR\s0, \s-1STRING\s0, \s-1POS\s0, \s-1SIZE\s0 )" 4
.IX Item "memwrite( ADDR, STRING, POS, SIZE )"
Writes \s-1SIZE\s0 bytes from \s-1STRING\s0 to a memory segment at \s-1ADDR\s0 starting at
position \s-1POS\s0. If \s-1STRING\s0 is too long, only \s-1SIZE\s0 bytes are used; if \s-1STRING\s0
is too short, nulls are written to fill out \s-1SIZE\s0 bytes. Returns true if
successful, or false if there is an error.

.\" Oracle has added the ARC stability level to this manual page
.SH ATTRIBUTES
See
.BR attributes (5)
for descriptions of the following attributes:
.sp
.TS
box;
cbp-1 | cbp-1
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE 
=
Availability	runtime/perl-512
=
Stability	Uncommitted
.TE 
.PP
.SH "SEE ALSO"
.IX Header "SEE ALSO"
IPC::Msg, IPC::Semaphore, IPC::SharedMem, ftok, shmat, shmdt
.SH "AUTHORS"
.IX Header "AUTHORS"
Graham Barr <gbarr@pobox.com>,
Jarkko Hietaniemi <jhi@iki.fi>,
Marcus Holland-Moritz <mhx@cpan.org>
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Version 2.x, Copyright (C) 2007, Marcus Holland-Moritz.
.PP
Version 1.x, Copyright (c) 1997, Graham Barr.
.PP
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.


.SH NOTES

.\" Oracle has added source availability information to this manual page
This software was built from source available at https://java.net/projects/solaris-userland.  The original community source was downloaded from  http://www.cpan.org/src/5.0/perl-5.12.5.tar.bz2

Further information about this software can be found on the open source community website at http://www.perl.org/.