Help-Site Computer Manuals
Software
Hardware
Programming
Networking
  Algorithms & Data Structures   Programming Languages   Revision Control
  Protocols
  Cameras   Computers   Displays   Keyboards & Mice   Motherboards   Networking   Printers & Scanners   Storage
  Windows   Linux & Unix   Mac

IPC::Msg
SysV Msg IPC object class

IPC::Msg - SysV Msg IPC object class


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

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


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.

Programminig
Wy
Wy
yW
Wy
Programming
Wy
Wy
Wy
Wy