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Re: Challenge: Find potential use cases for non-trivial confinement
From: |
Bas Wijnen |
Subject: |
Re: Challenge: Find potential use cases for non-trivial confinement |
Date: |
Wed, 17 May 2006 15:14:04 +0200 |
User-agent: |
Mutt/1.5.11+cvs20060403 |
On Wed, May 17, 2006 at 01:56:48PM +0100, Sam Mason wrote:
> On Sun, Apr 30, 2006 at 11:17:53PM +0200, Marcus Brinkmann wrote:
> > Propose a use case for non-trivial confinement.
>
> How about the little (image) preview window that appears in some
> graphical open file dialogs?
>
> To me this seems as though the application would pass a capability to
> the open dialog naming a preview constructor in the calling application.
That is one way to implement it. Another is to pass the preview code itself
(by reference, it shouldn't be copied if it isn't used).
> Non-trivial confinement is needed because the open dialog doesn't trust
> the calling program to not grant itself permission to the previewers
> address space and to pull information out of it after the user has
> selected a file.
If you remove the "non-trivial", I agree. :-) I think this can easily be
implemented using trivial confinement as well, though. Or am I missing
something?
Thanks,
Bas
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- Re: Challenge: Find potential use cases for non-trivial confinement, (continued)
Re: Challenge: Find potential use cases for non-trivial confinement, Sam Mason, 2006/05/17
- Re: Challenge: Find potential use cases for non-trivial confinement,
Bas Wijnen <=
- Re: Challenge: Find potential use cases for non-trivial confinement, Sam Mason, 2006/05/18
- Re: Challenge: Find potential use cases for non-trivial confinement, Pierre THIERRY, 2006/05/18
- Re: Challenge: Find potential use cases for non-trivial confinement, Bas Wijnen, 2006/05/18
- Re: Challenge: Find potential use cases for non-trivial confinement, Pierre THIERRY, 2006/05/18
- Re: Challenge: Find potential use cases for non-trivial confinement, Bas Wijnen, 2006/05/18
- Re: Challenge: Find potential use cases for non-trivial confinement, Sam Mason, 2006/05/18
- Re: Challenge: Find potential use cases for non-trivial confinement, Pierre THIERRY, 2006/05/18
- Re: Challenge: Find potential use cases for non-trivial confinement, Jonathan S. Shapiro, 2006/05/18
Re: Challenge: Find potential use cases for non-trivial confinement, Michal Suchanek, 2006/05/19