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!feeder2.enfer-du-nord.net!talisker.lacave.net!lacave.net!not-for-mail
From	Michal Suchanek <hramrach@centrum.cz>
Newsgroups	comp.lang.ruby
Subject	Shell pipeline in Ruby?
Date	Thu, 12 May 2011 11:05:59 -0500
Organization	Service de news de lacave.net
Lines	20
Message-ID	<BANLkTik15O2NLu4grCfhbtF3Ws6N_c4Qtg@mail.gmail.com> (permalink)
NNTP-Posting-Host	bristol.highgroove.com
Content-Type	text/plain; charset=UTF-8
X-Trace	talisker.lacave.net 1305216377 78248 65.111.164.187 (12 May 2011 16:06:17 GMT)
X-Complaints-To	abuse@lacave.net
NNTP-Posting-Date	Thu, 12 May 2011 16:06:17 +0000 (UTC)
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	383093
X-Ml-Name	ruby-talk
X-Rubymirror	Yes
X-Ruby-Talk	<BANLkTik15O2NLu4grCfhbtF3Ws6N_c4Qtg@mail.gmail.com>
Xref	x330-a1.tempe.blueboxinc.net comp.lang.ruby:4387

Show key headers only | View raw

Hello,

how do you write an equivalent of

$ cmdA | cmdB | cmdC

in Ruby?

Specifically, I would like to see the PID, return value and stderr of
each of these commands but I would like cmdB to read the stdout of
cmdA directly, on its stdin, and similarily for cmdC and cmdB.

Here I am not interested in feeding cmdA some particular input (eg. it
can read /dev/null for all I care) but in general gluing arbitrary fd
to its stdin might be desirable in other cases.

Thanks

Michal

Back to comp.lang.ruby | Previous | Next — Next in thread | Find similar | Unroll thread

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