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 at
       <https://github.com/Perl/perl5/issues>.

COPYRIGHT

       Copyright (c) 1996-8 Graham Barr <gbarr@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.