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Re: [Bug-apl] Problems with shared variables

From: Elias Mårtenson
Subject: Re: [Bug-apl] Problems with shared variables
Date: Thu, 20 Feb 2014 19:16:52 +0800

On 20 Feb 2014 18:57, "Kacper Gutowski" <address@hidden> wrote:
> On 2014-02-16 18:09:06, Juergen Sauermann wrote:
> > Ad 1) I changed the assertions Symbol.cc to short warnings visible in )MORE.
> I wouldn't guess to check )MORE upon getting VALUE ERROR on shared
> variable, but I guess it's better than failed assertion.

Hmm, this makes me think about a new feature for the Emacs mode: some kind of warning in the modeline when there is an unread )MORE message.

Would this be useful? Do you get these kinds of messages often? I rarely look for it.

> It appears to work correctly for cooperating users now.  Malicious user,
> however, can still easily destroy other users' coupling of shared variables.
> I'm not going to push for changing it right now because I don't see any way
> to exploit it beyond denial of service and I'm not using shared variables
> for anything serious, but I think that it should be done eventually.

I suppose some proper authentication and authorisation mechanism is needed too. Then comes the question of encryption. Things like Kerberos is easy to add and is powerful. However, it does require infrastructure a lot of people don't have.


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