Secure scripts variables

[Florian Lindner]

Paul Rubin wrote:

> Florian Lindner <Florian.Lindner at xgm.de> writes:
>> I have a script which is readable and executable by a user, but not
>> writable.
>> The users executes the scripts, it reads in a value and based on this
>> value it computes a result and stores it in a variable.
>> Can the user read out the value of this variable? If yes, can he be
>> prevented to do so?
> 
> I don't really understand the question.  The user could, for example,
> run the Python interpreter under a debugger, and examine its internal
> state step by step during execution.
> 
> What you really want is a setuid script.  That can do what you want,
> but you have to write them very carefully.

AFAIK scripts can't be setuid? Can you tell me what you mean and how to do
it?

Florian