IPC::Msg - SysV Msg IPC object class

NAME

IPC::Msg - SysV Msg IPC object class

SYNOPSIS

    use IPC::SysV qw(IPC_PRIVATE S_IRUSR S_IWUSR);
    use IPC::Msg;
    $msg = IPC::Msg->new(IPC_PRIVATE, S_IRUSR | S_IWUSR);
    $msg->snd(pack("l! a*",$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

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. 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

the IPC::SysV manpage, the Class::Struct manpage

AUTHORS

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

COPYRIGHT

Version 2.x, Copyright (C) 2007, 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.

 IPC::Msg - SysV Msg IPC object class