# phpman > info > IPC::Msg

IPC::[Msg(3perl)](https://www.chedong.com/phpMan.php/man/Msg/3perl/markdown)        Perl Programmers Reference Guide        IPC::[Msg(3perl)](https://www.chedong.com/phpMan.php/man/Msg/3perl/markdown)

NAME
       [IPC::Msg](https://www.chedong.com/phpMan.php/perldoc/IPC%3A%3AMsg/markdown) - SysV Msg IPC object class

SYNOPSIS
           use [IPC::SysV](https://www.chedong.com/phpMan.php/perldoc/IPC%3A%3ASysV/markdown) qw(IPC_PRIVATE S_IRUSR S_IWUSR);
           use [IPC::Msg](https://www.chedong.com/phpMan.php/perldoc/IPC%3A%3AMsg/markdown);

           $msg = [IPC::Msg](https://www.chedong.com/phpMan.php/perldoc/IPC%3A%3AMsg/markdown)->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

           o   "KEY" is equal to "IPC_PRIVATE"

           o   "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)](https://www.chedong.com/phpMan.php/man/msgrcv/2/markdown).  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(2)](https://www.chedong.com/phpMan.php/man/msgsnd/2/markdown).

       stat
           Returns an object of type "[IPC::Msg::stat](https://www.chedong.com/phpMan.php/perldoc/IPC%3A%3AMsg%3A%3Astat/markdown)" which is a sub-class of
           "[Class::Struct](https://www.chedong.com/phpMan.php/perldoc/Class%3A%3AStruct/markdown)". 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](https://www.chedong.com/phpMan.php/perldoc/IPC%3A%3ASysV/markdown), [Class::Struct](https://www.chedong.com/phpMan.php/perldoc/Class%3A%3AStruct/markdown)

AUTHORS
       Graham Barr <<gbarr@pobox.com>>, Marcus Holland-Moritz <<mhx@cpan.org>>

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.

perl v5.34.0                      2025-07-25                   IPC::[Msg(3perl)](https://www.chedong.com/phpMan.php/man/Msg/3perl/markdown)