IPC::Msg

• NAME
• SYNOPSIS
• DESCRIPTION
• METHODS
• SEE ALSO
• AUTHORS
• COPYRIGHT

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);

$msg->snd($msgtype, $msgdata);

$msg->rcv($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. 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

IPC::SysV, Class::Struct

AUTHORS

Graham Barr <[email protected]>, Marcus Holland-Moritz <[email protected]>

COPYRIGHT

Version 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.