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CONTENTS

NAME

IPC::Msg - SysV Msg IPC object class

SYNOPSIS

 use IPC::SysV qw(IPC_PRIVATE S_IRWXU S_IRWXG S_IRWXO);
 use IPC::Msg;
 
 $msg = new IPC::Msg(IPC_PRIVATE, S_IRWXU | S_IRWXG | S_IRWXO);
 
 $msg->snd(pack("L a*",$msgtype,$msg));
 
 $msg->rcv($buf,256);
 
 $ds = $msg->stat;
 
 $msg->remove;

DESCRIPTION

METHODS

new ( KEY , FLAGS )

Creates a new message queue associated with KEY. A new queue is created if

  • KEY is equal to IPC_PRIVATE

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

On creation of a new message queue FLAGS is used to set the permissions.

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. See msgrcv

remove

Remove and destroy the message queue from the system.

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

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

uid
gid
mode (oly the permission bits)
qbytes

set accepts either a stat object, as returned by the stat method, or a list of name-value pairs.

snd ( TYPE, MSG [, FLAGS ] )

Place a message on the queue with the data from MSG and with type TYPE. See msgsnd.

stat

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

uid
gid
cuid
cgid
mode
qnum
qbytes
lspid
lrpid
stime
rtime
ctime

SEE ALSO

IPC::SysV Class::Struct

AUTHOR

Graham Barr <gbarr@pobox.com>

COPYRIGHT

Copyright (c) 1997 Graham Barr. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.