IPC::Msg - SysV Msg IPC object class

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

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. perl v5.40.1 2025-07-03 IPC::Msg(3perl)

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

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. 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. See msgrcv(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 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(2). 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

IPC::Msg - SysV Msg IPC object class

IPC::SysV, Class::Struct

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;