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.
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.