MirOS Manual: IPC::Msg(3p)


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

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 mes-
     sage 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 asso-
             ciated 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" struc-
         ture associated with the message queue.

             uid
             gid
             mode (oly the permission bits)
             qbytes

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

         "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

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.

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