IPC::Msg(3p) Perl Programmers Reference Guide IPC::Msg(3p)

IPC::Msg(3p) Perl Programmers Reference Guide IPC::Msg(3p) #

IPC::Msg(3p) Perl Programmers Reference Guide IPC::Msg(3p)

NNAAMMEE #

 IPC::Msg - SysV Msg IPC object class

SSYYNNOOPPSSIISS #

     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;

DDEESSCCRRIIPPTTIIOONN #

 A class providing an object based interface to SysV IPC message queues.

MMEETTHHOODDSS #

 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 "_F_L_A_G_S & 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 mmssggrrccvv(2).  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 _n_a_m_e-_v_a_l_u_e pairs.

 snd ( TYPE, MSG [, FLAGS ] )
     Place a message on the queue with the data from "MSG" and with type
     "TYPE".  See mmssggssnndd(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

SSEEEE AALLSSOO #

 IPC::SysV, Class::Struct

AAUUTTHHOORRSS #

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

CCOOPPYYRRIIGGHHTT #

 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 v5.36.3 2023-02-15 IPC::Msg(3p)