IO::Pipe(3p) Perl Programmers Reference Guide IO::Pipe(3p) #

IO::Pipe(3p) Perl Programmers Reference Guide IO::Pipe(3p)

NNAAMMEE #

 IO::Pipe - supply object methods for pipes

SSYYNNOOPPSSIISS #

         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>) {
             ...
         }

DDEESSCCRRIIPPTTIIOONN #

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

CCOONNSSTTRRUUCCTTOORR #

 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.

MMEETTHHOODDSS #

 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.

SSEEEE AALLSSOO #

 IO::Handle

AAUUTTHHOORR #

 Graham Barr. Currently maintained by the Perl Porters.  Please report all
 bugs at <https://github.com/Perl/perl5/issues>.

CCOOPPYYRRIIGGHHTT #

 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.

perl v5.36.3 2023-02-15 IO::Pipe(3p)