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NAMEIPC::Msg - SysV Msg IPC object class
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;
DESCRIPTIONA class providing an object based interface to SysV
- new ( KEY , FLAGS)
Creates a new message queue associated with "KEY". A new queue is
- "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 VIPCimplementation does not allow: in some systems setting execute bits makes the operations fail.
- 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 BUFbecomes tainted.
- 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).
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 ALSOIPC::SysV, Class::Struct
AUTHORSGraham Barr <firstname.lastname@example.org>, Marcus Holland-Moritz <email@example.com>
COPYRIGHTVersion 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.