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perlman:IPC::Msg

by root (Scribe)
on Dec 23, 1999 at 00:52 UTC ( #1226=perlfunc: print w/ replies, xml ) Need Help??

IPC::Msg

See the current Perl documentation for IPC::Msg.

Here is our local, out-dated (pre-5.6) version:


IPC::Msg - SysV Msg IPC object class



    use IPC::SysV qw(IPC_PRIVATE S_IRWXU S_IRWXG S_IRWXO);
    use IPC::Msg;
    
    $msg = new IPC::Msg(IPC_PRIVATE, S_IRWXU | S_IRWXG | S_IRWXO);
    
    $msg->snd(pack("L a*",$msgtype,$msg));
    
    $msg->rcv($buf,256);

    


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 <EM>FLAGS</EM> & 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

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

SysV 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.


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