-- Perl 5.8.6 documentation --
IPC::Msg

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.