IPC::Msg

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;

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 <i>FLAGS</i> & 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 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.
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
```

Graham Barr <gbarr@pobox.com>