From: nobu.nokada@...
Date: 2002-06-12T10:31:46+09:00
Subject: Re: catching error message

Hi,

At Wed, 12 Jun 2002 07:19:49 +0900,
Tobias Reif wrote:
> open('error_log.txt','w') do |file|
>    file.write `domcount foo.xhtml`
> end
> 
> ; error_log.txt is then
> 
> "Errors occured, no output available".
> 
> , and all the errors are printed to the console. How to write the
> errors to the file?

  def redirect2(output, error, *commands)
    if output
      saved_out = STDOUT.dup
      STDOUT.reopen(output)
    end
    if error
      saved_err = STDOUT.dup
      STDERR.reopen(error)
    end
    system *commands
  ensure
    STDERR.reopen(saved_err) if error
    STDOUT.reopen(saved_out) if output
  end

  open('error_log.txt','w') do |file|
    redirect2(file, file, "domcount", "foo.xhtml")
  end

-- 
Nobu Nakada