CONTENTS

• NAME
• SYNOPSIS
• DESCRIPTION
• METHODS
• SEE ALSO
• AUTHORS
• COPYRIGHT

#NAME

IPC::Msg - SysV Msg IPC object class

#SYNOPSIS

use IPC::SysV qw(IPC_PRIVATE S_IRUSR S_IWUSR);use IPC::Msg;$msg = IPC::Msg->new(IPC_PRIVATE, S_IRUSR | S_IWUSR);$msg->snd($msgtype, $msgdata);$msg->rcv($buf, 256);$ds = $msg->stat;$msg->remove;

#DESCRIPTION

A class providing an object based interface to SysV IPC message queues.

#METHODS

#new ( KEY , FLAGS )

Creates a new message queue associated withKEY. A new queue is created if

• KEY is equal toIPC_PRIVATE

• KEY does not already have a message queue associated with it, andFLAGS & IPC_CREAT is true.

On creation of a new message queueFLAGS is used to set the permissions. Be careful not to set any flags that the Sys V IPC implementation does not allow: in some systems setting execute bits makes the operations fail.

#id

Returns the system message queue identifier.

#rcv ( BUF, LEN [, TYPE [, FLAGS ]] )

Read a message from the queue. Returns the type of the message read. Seemsgrcv(2). The BUF becomes tainted.

#remove

Remove and destroy the message queue from the system.

#set ( STAT )

#set ( NAME => VALUE [, NAME => VALUE ...] )

set will set the following values of thestat structure associated with the message queue.

uidgidmode (oly the permission bits)qbytes

set accepts either a stat object, as returned by thestat method, or a list ofname-value pairs.

#snd ( TYPE, MSG [, FLAGS ] )

Place a message on the queue with the data fromMSG and with typeTYPE. Seemsgsnd(2).

#stat

Returns an object of typeIPC::Msg::stat which is a sub-class ofClass::Struct. It provides the following fields. For a description of these fields see you system documentation.

uidgidcuidcgidmodeqnumqbyteslspidlrpidstimertimectime

#SEE ALSO

IPC::SysV,Class::Struct

#AUTHORS

Graham Barr <gbarr@pobox.com>, Marcus Holland-Moritz <mhx@cpan.org>

#COPYRIGHT

Version 2.x, Copyright (C) 2007-2013, Marcus Holland-Moritz.

Version 1.x, Copyright (c) 1997, Graham Barr.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

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