From: Tim Bates <tim@...>
Date: 2003-03-09T16:59:35+09:00
Subject: $0 == false ??

I'm running a script under mod_ruby, and for some reason $0 is set to false. 
Two questions, then:

Why would it be false, instead of 'myscript.rb'? Has mod_ruby clobbered it?

Without $0, how can I retrieve the name of the currently running script from 
within a require'd file? (ie, __FILE__ won't work...) Example:

tim@zaphod:~$ cat a.rb
require 'b.rb'

tim@zaphod:~$ cat b.rb
puts "$0 == #{$0}"
puts "__FILE__ == #{__FILE__}"

tim@zaphod:~$ ruby a.rb
$0 == a.rb
__FILE__ == ./b.rb
tim@zaphod:~$

In b.rb, I want to retrieve the value 'a.rb', so __FILE__ is no good, but if 
$0 has been clobbered, what can I do?

Tim Bates
-- 
tim@bates.id.au