poe::pipe::oneway(3pm) [debian man page]

POE::Pipe::OneWay(3pm)					User Contributed Perl Documentation				    POE::Pipe::OneWay(3pm)

NAME

       POE::Pipe::OneWay - a portable API for one-way pipes

SYNOPSIS

	 my ($read, $write) = POE::Pipe::OneWay->new();
	 die "couldn't create a pipe: $!" unless defined $read;

DESCRIPTION

       The right way to create an anonymous pipe varies from one operating system to the next.	Some operating systems support "pipe()".  Others
       require "socketpair()".	And a few operating systems support neither, so a plain old socket must be created.

       POE::Pipe::OneWay will attempt to create a unidirectional pipe using "pipe()", "socketpair()", and IO::Socket::INET, in that order.
       Exceptions are hardcoded for operating systems with broken or nonstandard behaviors.

       The upshot of all this is that an application can portably create a one-way pipe by instantiating POE::Pipe::OneWay.  The work of deciding
       how to create the pipe and opening the handles will be taken care of internally.

       POE::Pipe::OneWay may be used outside of POE, as it doesn't use POE internally.

PUBLIC METHODS

   new [TYPE]
       Create a new one-way pipe, optionally constraining it to a particular TYPE of pipe.  One-way pipes have two ends: a "read" end and a
       "write" end.  On success, new() returns two handles: one for the "read" end and one for the "write" end.  Returns nothing on failure, and
       sets $!	to explain why the constructor failed.

	 my ($read, $write) = POE::Pipe::OneWay->new();
	 die $! unless defined $read;

       TYPE may be one of "pipe", "socketpair", or "inet".  When set, POE::Pipe::OneWay will constrain its search to either "pipe()", a UNIX-
       domain "socketpair()", or plain old sockets, respectively.  Otherwise new() will try each method in order, or a particular method
       predetermined to be the best one for the current operating environment.

BUGS

       POE::Pipe::OneWay may block up to one second on some systems if failure occurs while trying to create "inet" sockets.

SEE ALSO

       POE::Pipe, POE::Pipe::TwoWay.

AUTHOR &; COPYRIGHT
       POE::Pipe::OneWay is copyright 2000-2008 by Rocco Caputo.  All rights reserved.	POE::Pipe::OneWay is free software; you may redistribute
       it and/or modify it under the same terms as Perl itself.

perl v5.14.2							    2012-05-15						    POE::Pipe::OneWay(3pm)

Check Out this Related Man Page

IO::Pipe(3pm)						 Perl Programmers Reference Guide					     IO::Pipe(3pm)

NAME

       IO::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 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 <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.

perl v5.8.0							    2002-06-01							     IO::Pipe(3pm)

Linux and UNIX Man Pages

poe::pipe::oneway(3pm) [debian man page]

Check Out this Related Man Page