From: nobu.nokada@...
Date: 2004-11-18T00:39:49+09:00
Subject: Re: Detecting rubyw

Hi,

At Wed, 17 Nov 2004 23:57:52 +0900,
Nathaniel Talbott wrote in [ruby-talk:120639]:
> >> Is there any way (on Windows) to detect if a script is running under
> >> rubyw.exe, i.e. headless?
> >
> > Can you open "CONIN$" and "CONOUT$" device files?
> 
> I don't know... how would I do that? I don't think I've ever opened a 
> device file on Windows.

Just open as well as ordinary files.

  begin
    open("CONIN$") {}
    open("CONOUT$", "w") {}
    have_console = true
  rescue SystemCallError
    have_console = false
  end

-- 
Nobu Nakada