From: "Mauricio Fernández" <mfp@...>
Date: 2005-11-07T09:46:06+09:00
Subject: Re: Lazy fun: Make unary minus silence stderr for backticks

On Mon, Nov 07, 2005 at 08:33:35AM +0900, Sam Stephenson wrote:
> The way I'm silencing stderr is a bit, um, agile.  Can it be made to
> work in Ruby on Windows without loading an external library (since
> open3 doesn't work there)?

batsman@tux-chan:/tmp$ cat test.rb
require 'rbconfig'
def nostderr
  old = STDERR.dup
  # unsure about the next line
  file = (::Config::CONFIG["arch"] =~ /dos|win32|mingw/) ? "NUL" : "/dev/null"
  STDERR.reopen(file) 
  STDERR.sync = true  # you want this so `hello3` still outputs something below...
  yield
ensure
  STDERR.reopen(old)
end

`hello`
nostderr { `hello2`; $stderr.puts "foo"  }
`hello3`
batsman@tux-chan:/tmp$ ruby test.rb
test.rb:2: command not found: hello
test.rb:2: command not found: hello3


-- 
Mauricio Fernandez