IO::Pipe(3pm) Perl Programmers Reference Guide IO::Pipe(3pm)
NAME
IO::Pipe - supply object methods for pipes
SYNOPSIS
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>) {
...
}
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 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 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(3)
AUTHOR
Graham Barr. Currently maintained by the Perl Porters. Please report
all bugs to <perlbug@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.
perl v5.24.0 2016-02-05 IO::Pipe(3pm)
perl 5.24 - Generated Sun Nov 13 19:43:00 CST 2016