IO::Pipe

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 creating pipes between processes.

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.

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.

Graham Barr. Currently maintained by the Perl Porters. Please report all bugs to <perl5-porters@perl.org>.