IO::Pipe

• NAME
• SYNOPSIS
• DESCRIPTION
• CONSTRUCTOR
• METHODS
• SEE ALSO
• AUTHOR
• COPYRIGHT

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

AUTHOR

Graham Barr. Currently maintained by the Perl Porters. Please report all bugs to <[email protected]>.

COPYRIGHT

Copyright (c) 1996-8 Graham Barr <[email protected]>. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.