ipc::msg(3)
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 follow
ing 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.