phpMan > man > IO::Pipe(3pm)

NAME
    IO::Pipe - supply object methods for pipes

SYNOPSIS
            use IO::Pipe;

            $pipe = IO::Pipe->new();

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

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

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

                print $pipe ...
            }

            or

            $pipe = IO::Pipe->new();

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

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

DESCRIPTION
    "IO::Pipe" provides an interface to creating pipes between processes.

CONSTRUCTOR
    new ( [READER, WRITER] )
        Creates an "IO::Pipe", which is a reference to a newly created symbol (see the "Symbol"
        package). "IO::Pipe::new" optionally takes two arguments, which should be objects blessed
        into "IO::Handle", or a subclass thereof. These two objects will be used for the system call
        to "pipe". If no arguments are given then method "handles" is called on the new "IO::Pipe"
        object.

        These two handles are held in the array part of the GLOB until either "reader" or "writer"
        is called.

METHODS
    reader ([ARGS])
        The object is re-blessed into a sub-class of "IO::Handle", and becomes a handle at the
        reading end of the pipe. If "ARGS" are given then "fork" is called and "ARGS" are passed to
        exec.

    writer ([ARGS])
        The object is re-blessed into a sub-class of "IO::Handle", and becomes a handle at the
        writing end of the pipe. If "ARGS" are given then "fork" is called and "ARGS" are passed to
        exec.

    handles ()
        This method is called during construction by "IO::Pipe::new" on the newly created "IO::Pipe"
        object. It returns an array of two objects blessed into "IO::Pipe::End", or a subclass
        thereof.

SEE ALSO
    IO::Handle

AUTHOR
    Graham Barr. Currently maintained by the Perl Porters. Please report all bugs to
    <perlbug AT perl.org>.

COPYRIGHT
    Copyright (c) 1996-8 Graham Barr <gbarr AT pobox.com>. All rights reserved. This program is free
    software; you can redistribute it and/or modify it under the same terms as Perl itself.