IO::Pipe - supply object methods for pipes
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>) {
...
}
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.
the IO::Handle manpage
Graham Barr. Currently maintained by the Perl Porters. Please report all
bugs to <perlbug@perl.org>.
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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