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Re: gnu-system-demo feedback

From: Ludovic Courtès
Subject: Re: gnu-system-demo feedback
Date: Wed, 16 Oct 2013 15:12:08 +0200
User-agent: Gnus/5.130007 (Ma Gnus v0.7) Emacs/24.3 (gnu/linux)

address@hidden (Ludovic Courtès) skribis:

> Walter Franzini <address@hidden> skribis:
>> On Mon, Oct 14 2013, Ludovic Courtès wrote:
>> [...]
>>>> 3. running guix gc as root empties /etc (broken symlinks)
>>>> 4. running guix gc as guest (!) empties /etc (broken symlinks)
>>> A bug: I forgot to register them as GC roots (see gnu/system/vm.scm.)
>> Ok for the bug about GC roots, but I expected a 'guest' not to be able
>> to alter the system state (/etc).
> Unprivileged users can access the store via the daemon.  Notably, they
> can run the GC.
> The GC only ever deletes files that are no longer referenced.  These
> /etc files were clearly still referenced, but the GC just didn’t know
> about it.

I probably wasn’t clear.  The GC only takes care of files under
/nix/store, and it cannot remove anything outside of that directory.

The files in /etc are symlinks to files under /nix/store, and it’s those
files that were removed.  The symlinks were still there, just dangling.


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