


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
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.

       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 the msgrcv manpage.  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




2000-04-06                 perl v5.6.0                          1





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 the msgsnd manpage.

       stat
           Returns an object of type `IPC::Msg::stat' which is a
           sub-class of `Class::Struct'. It provides the follow-
           ing 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
       the IPC::SysV manpage the Class::Struct manpage

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.




















2000-04-06                 perl v5.6.0                          2


