MAN page from Old RedHat 5.X perl-5.004-4.i386.rpm

IO::Pipe

Section: Perl Programmers Reference Guide (3)
Updated: perl 5.004, patch 04
Index

NAME

IO::pipe - supply object methods for pipes

        use IO::Pipe;

        $pipe = new IO::Pipe;

        if($pid = fork()) { # Parent            $pipe->reader();

            while(<$pipe> {                ....            }

        }        elsif(defined $pid) { # Child            $pipe->writer();

            print $pipe ....        }

or

        $pipe = new IO::Pipe;

        $pipe->reader(qw(ls -l));

        while(<$pipe>) {            ....        }

IO::Pipe provides an interface to createing pipes betweenprocesses.

new ( [READER, WRITER] ): Creates a IO::Pipe, which is a reference to a newly created symbol(see the Symbol package). IO::Pipe::new optionally takes twoarguments, which should be objects blessed into IO::Handle, or asubclass thereof. These two objects will be used for the system callto pipe. If no arguments are given then method handles is calledon the new IO::Pipe object.
These two handles are held in the array part of the GLOB until eitherreader or writer is called.

reader ([ARGS]): The object is re-blessed into a sub-class of IO::Handle, and becomes ahandle at the reading end of the pipe. If ARGS are given then forkis called and ARGS are passed to exec.
writer ([ARGS]): The object is re-blessed into a sub-class of IO::Handle, and becomes ahandle at the writing end of the pipe. If ARGS are given then forkis called and ARGS are passed to exec.
handles (): This method is called during construction by IO::Pipe::newon the newly created IO::Pipe object. It returns an array of two objectsblessed into IO::Pipe::End, or a subclass thereof.

Graham Barr <bodgAATTtiuk.ti.com>

This document was created byman2html,using the manual pages.