From: Ken Bloom <kbloom@...>
Date: 2007-12-06T09:40:00+09:00
Subject: Re: How to redirect a "system" standard output and standard error to a	variable (Linux)

On Tue, 27 Nov 2007 16:17:30 -0500, Venks wrote:

> Note:  parts of this message were removed by the gateway to make it a
> legal Usenet post.
> 
> To clarify further I want to capture any standard output or standard
> error.
> 
> Thanks,
> 
> ---------- Forwarded message ---------- From: Venks
> <venkatesh.mantha@gmail.com> Date: Nov 27, 2007 3:58 PM
> Subject: How to redirect a "system" standard output to a variable To:
> ruby-talk@ruby-lang.org
> 
> 
> Hi,
> 
> I need to redirect any standard output thrown when using a system call
> into a Ruby variable. I tried to search for a solution but couldn't find
> anything that worked. May be I am not using the right search terms.
> 
> Here is what I am trying to do.
> 
> begin
> 
>   `rm somefile`
> 
> end
> 
> If "somefile" doesn't exist the OS throws the message "rm: cannot remove
> `somefile': No such file or directory" which I want to capture into a
> variable.
> 
> Thanks,

You need to use popen3, because the message is printed on standard error, 
not standard out.

--Ken

-- 
Ken (Chanoch) Bloom. PhD candidate. Linguistic Cognition Laboratory.
Department of Computer Science. Illinois Institute of Technology.
http://www.iit.edu/~kbloom1/