IPC::Msg - SysV Msg IPC object class
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;
A class providing an object based interface to SysV IPC message queues.
- 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(2). The BUF becomes tainted.
- remove
-
Remove and destroy the message queue from the system.
- set ( STAT )
-
- set ( NAME => VALUE [, NAME => VALUE ...] )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(2).
- 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
the IPC::SysV manpage, the Class::Struct manpage
Graham Barr <gbarr@pobox.com>,
Marcus Holland-Moritz <mhx@cpan.org>
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.
|