From: Sean O'Dell <sean@...>
Date: 2004-06-21T03:55:36+09:00
Subject: Re: StringIO class ?

On Sunday 20 June 2004 06:51, Michael Neumann wrote:
> On Sun, Jun 20, 2004 at 10:33:16PM +0900, Lothar Scholz wrote:
> > Hello, i must set the $stderr to an object that collects the data
> > inside a buffer. Is there something like pythons StringIO class ?
>
> Have you tried StingIO :-)
>
>   require 'stringio'
>
>   str = "hello world"
>   io = StringIO.new(str)

That works for the most part.  If you ever have trouble getting EVERYTHING 
captured that's going to $stderr, just pipe all fd[2] output to a file:

# redirect stderr
$new_stderr = File::open("capture_file");
$old_stderr = $stderr.clone
$stderr.reopen($new_stderr);

# ... STDERR is captured here ...

# restore stderr
$stderr.reopen($old_stderr);
$new_stderr.close

Now you have a file named "capture_file" which has everything that was sent to 
stderr, even from code that didn't use Ruby's $stderr object.

	Sean O'Dell