


lib::IO::Pipe(3p)Perl Programmers Reference Guidlib::IO::Pipe(3p)


NAME
       IO::pipe - supply object methods for pipes

SYNOPSIS
               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>) {
                   ....
               }


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

CONSTRUCTOR
       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 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



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lib::IO::Pipe(3p)Perl Programmers Reference Guidlib::IO::Pipe(3p)


           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
       the IO::Handle manpage

AUTHOR
       Graham Barr <bodg@tiuk.ti.com>

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
































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