IO::Pipe(3) Perl Programmers Reference Guide IO::Pipe(3)NAMEIO::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
16/Sep/1999 perl 5.005, patch 03 1
IO::Pipe(3) Perl Programmers Reference Guide IO::Pipe(3)
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.
16/Sep/1999 perl 5.005, patch 03 2