From: Tony Targonski <Tony.Targonski@...>
Date: 2005-04-13T06:05:09+09:00
Subject: Re: Security within a ruby interpreter

-----Original Message-----
From: Dominik Werder [mailto:dwerder@gmx.net] 
Sent: Tuesday, April 12, 2005 4:50 PM
To: ruby-talk ML
Subject: Security within a ruby interpreter

But how can I be sure that nobody can alter the class at runtime?

Dominik
---------------------------

By using Ruby's safe levels.

$SAFE = 4

Will set the paranoia level to its highest ;) Ruby documentation says
the following:

">= 4 Ruby effectively partitions the running program in two. Nontainted
objects may not be modified. Typically, this will be used to create a
sandbox: the program sets up an environment using a lower $SAFE level,
then resets $SAFE to 4 to prevent subsequent changes to that
environment."

--Tony