Re: Shell pipeline in Ruby?

Path	csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!aioe.org!feeder.news-service.com!de-l.enfer-du-nord.net!feeder1.enfer-du-nord.net!talisker.lacave.net!lacave.net!not-for-mail
From	Roger Pack <rogerpack2005@gmail.com>
Newsgroups	comp.lang.ruby
Subject	Re: Shell pipeline in Ruby?
Date	Fri, 13 May 2011 08:48:27 -0500
Organization	Service de news de lacave.net
Lines	40
Message-ID	<51b4f0fd6ff287e356ae26e5b951f3ae@ruby-forum.com> (permalink)
References	<BANLkTik15O2NLu4grCfhbtF3Ws6N_c4Qtg@mail.gmail.com> <00489613d64495c765cada2702102dd7@ruby-forum.com>
NNTP-Posting-Host	bristol.highgroove.com
Content-Type	text/plain; charset=UTF-8
Content-Transfer-Encoding	7bit
X-Trace	talisker.lacave.net 1305294698 27095 65.111.164.187 (13 May 2011 13:51:38 GMT)
X-Complaints-To	abuse@lacave.net
NNTP-Posting-Date	Fri, 13 May 2011 13:51:38 +0000 (UTC)
In-Reply-To	<00489613d64495c765cada2702102dd7@ruby-forum.com>
X-Received-From	This message has been automatically forwarded from the ruby-talk mailing list by a gateway at comp.lang.ruby. If it is SPAM, it did not originate at comp.lang.ruby. Please report the original sender, and not us. Thanks! For more details about this gateway, please visit: http://blog.grayproductions.net/categories/the_gateway
X-Mail-Count	383206
X-Ml-Name	ruby-talk
X-Rubymirror	Yes
X-Ruby-Talk	<51b4f0fd6ff287e356ae26e5b951f3ae@ruby-forum.com>
Xref	x330-a1.tempe.blueboxinc.net comp.lang.ruby:4489

Show key headers only | View raw

Roger Pack wrote in post #998434:
> In the spirit of the recent call for better ruby documentation, I wrote
> a
> writeup:
>
> 
http://en.wikibooks.org/w/index.php?title=Ruby_Programming/Running_Multiple_Processes&stable=0#Chaining_processes


Unfortunately it appears the wiki formatting is mangled in firefox, but 
works well in chrome :)

Here's the complete code snippet:


pipe_me_in, pipe_peer_out = IO.pipe
pipe_peer_in, pipe_me_out = IO.pipe

fork do
  STDIN.reopen(pipe_peer_in)
  STDOUT.reopen(pipe_peer_out)
  Kernel.exec("echo 33")
  # this line is never executed because exec moves the process
end
pipe_peer_out.close # file handles have to all be closed in order for 
the "read" method, below, to be able to know
# that it's done reading data, so it can return.  See also 
http://devver.wordpress.com/2009/10/22/beware-of-pipe-duplication-in-subprocesses/
pipe_me_in.read



There is a link in there to a blog describing ruby's shell class, 
perhaps you did not see it?

-r

-- 
Posted via http://www.ruby-forum.com/.

Thread

Shell pipeline in Ruby? Michal Suchanek <hramrach@centrum.cz> - 2011-05-12 11:05 -0500
  Re: Shell pipeline in Ruby? Jos Backus <jos@catnook.com> - 2011-05-12 12:22 -0500
    Re: Shell pipeline in Ruby? Michal Suchanek <hramrach@centrum.cz> - 2011-05-12 14:41 -0500
      Re: Shell pipeline in Ruby? Stu <stu@rubyprogrammer.net> - 2011-05-12 14:54 -0500
        Re: Shell pipeline in Ruby? Michal Suchanek <hramrach@centrum.cz> - 2011-05-12 15:15 -0500
  Re: Shell pipeline in Ruby? 7stud -- <bbxx789_05ss@yahoo.com> - 2011-05-12 13:06 -0500
  Re: Shell pipeline in Ruby? Roger Pack <rogerpack2005@gmail.com> - 2011-05-12 22:13 -0500
    Re: Shell pipeline in Ruby? Michal Suchanek <hramrach@centrum.cz> - 2011-05-13 03:33 -0500
      Re: Shell pipeline in Ruby? Roger Pack <rogerpack2005@gmail.com> - 2011-05-13 08:44 -0500
    Re: Shell pipeline in Ruby? Roger Pack <rogerpack2005@gmail.com> - 2011-05-13 08:48 -0500
      Re: Shell pipeline in Ruby? Michal Suchanek <hramrach@centrum.cz> - 2011-05-13 13:14 -0500
  Re: Shell pipeline in Ruby? Robert Klemme <shortcutter@googlemail.com> - 2011-05-13 03:44 -0500
    Re: Shell pipeline in Ruby? Michal Suchanek <hramrach@centrum.cz> - 2011-05-13 08:27 -0500
      Re: Shell pipeline in Ruby? Robert Klemme <shortcutter@googlemail.com> - 2011-05-13 09:23 -0500
        Re: Shell pipeline in Ruby? Michal Suchanek <hramrach@centrum.cz> - 2011-05-13 12:44 -0500
  Re: Shell pipeline in Ruby? Michal Suchanek <hramrach@centrum.cz> - 2011-05-13 10:32 -0500
    Re: Shell pipeline in Ruby? Brian Candler <b.candler@pobox.com> - 2011-05-14 10:05 -0500
      Re: Shell pipeline in Ruby? Michal Suchanek <hramrach@centrum.cz> - 2011-05-16 06:05 -0500
  Re: Shell pipeline in Ruby? Brian Candler <b.candler@pobox.com> - 2011-05-14 10:14 -0500
  Re: Shell pipeline in Ruby? Michal Suchanek <hramrach@centrum.cz> - 2011-05-16 10:29 -0500

csiph-web