From: John Carter <john.carter@...>
Date: 2009-04-20T08:45:14+09:00
Subject: Which ruby is running me?

So I have despaired of getting mutexes, threads and forks to coexist
peacably in Ruby. (As soon as the child process touches a mutex that
existed in the parent.... Bad Things can happen.)

So Plan B is to
  - spin a thread
  - to mind a fork
  - that just execs 
a new instance of Ruby.

Now I tend to have several versions of Ruby lying around on my Box.

What is the One True Way of finding the path to _the_ instance of ruby
that is currently executing this script?

GNU "Make" is pretty good about this, it has a $(MAKE) variable that
gives the exact path of make that is running.




John Carter                             Phone : (64)(3) 358 6639
Tait Electronics                        Fax   : (64)(3) 359 4632
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