ipc::msg(3pm)
NAME
IPC::Msg - SysV Msg IPC object class
SYNOPSIS
use IPC::SysV qw(IPC_PRIVATE S_IRWXU);
use IPC::Msg;
$msg = new IPC::Msg(IPC_PRIVATE, S_IRWXU);
$msg->snd(pack("l! a*",$msgtype,$msg));
$msg->rcv($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 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. 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 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.