From: Dave Burt <dave@...>
Date: 2005-11-25T10:12:26+09:00
Subject: Re: [ANN] RRobots - ducks, armed and dangerous

(Sorry for the blank post)

Simon Kr�ger wrote:
> Robots are distributed as source code (i don't see another way anyway)
> so nobody would want to compete against such a bot.
> (You can search ObjectSpace and find the other robot, setting his energy
> to -1, easy victory but without honour)
> Maybe there is a way to protect against such strategies i didn't thought
> of, any ideas?

$SAFE can stop this kind of thing. Run a thread for each robot, taint stuff 
you don't want it to be able to mess with (e.g. the thread), untaint the 
robot's code, and eval and run it under $SAFE=4.

Cheers,
Dave