MirOS Manual: IO::Pipe(3p)


IO::Pipe(3p)    Perl Programmers Reference Guide     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 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 sub-
         class 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

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

         "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 <perl5-porters@perl.org>.

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.

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