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 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 "IO::Han
dle", 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::Han
dle", 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. 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.
2001-03-18 perl v5.6.1 IO::Pipe(3)
