From: Joel VanderWerf <vjoel@...>
Date: 2005-10-09T01:26:48+09:00
Subject: Re: Save the world from evil code crusade

Joel VanderWerf wrote:
> aurelianito wrote:
> 
>>I want to say things like evil.rb code can write to "evil.log" but to
>>nothing else.
>>How can use threads to say this kind of things with threads?
>>
> 
> 
> require 'thread'
> 
> write_queue = Queue.new
> 
> safe_thread = Thread.new do
>   $SAFE = 4
>   data = "some data"
>   write_queue << data
> end
> 
> 
> write_thread = Thread.new do
>   loop do
>     data = write_queue.pop

If you have no control over this data object, you probably want to check
that it really is a String (and not some spoofed string with a dangerous
#to_s method).

>     puts data # or write to "evil.log"
>   end
> end
> 
> sleep 0.1
> 


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      vjoel : Joel VanderWerf : path berkeley edu : 510 665 3407