Safe Languages :-)

[Scott Penrose]

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Hi Dudes,

I am writing a module in our Portal which allows the execution of code 
from people we do not trust - students.

The idea is to provide a module that allows languages to be programmed 
with very simple inputs and outputs.

A simple example is - Enter some Logo Code and the output is a GIF.

I can use Safe (perldoc Safe) to do perl code with some level of 
safety, but what I am really looking for is better educational 
languages.

How would I go about providing a Safe environment for those languages. 
I do not have the luxury of a separate machine, but I can run separate 
processors.

Ideally I would have some of the following:

	* Perl - maybe just a tiny subset of perl
	* Logo - that would be ideal
	* C - Hmm... tricker, but don't need to support everything, just some 
syntax
	* Java - As for C
	* Lips/Scheme - There is a Perl module for this isn't there?
	* Miranda ?

Anyway - Obviously what ever I choose they are mostly limited in that 
they are restricted to general programming with only a very basic input 
and output (at this stage a single line of input and plain text output 
- - or generation of a graphic).

Ideas welcome :-)

Scott
- -- 
Scott Penrose
VP in charge of Pancakes
http://linux.dd.com.au/
scottp at dd.com.au

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