From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: gnu-system-demo feedback
Date: Wed, 16 Oct 2013 15:12:08 +0200
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In-Reply-To: <87k3hfipf8.fsf@gnu.org> ("Ludovic
	\=\?utf-8\?Q\?Court\=C3\=A8s\=22'\?\=
	\=\?utf-8\?Q\?s\?\= message of "Mon, 14 Oct 2013 22:10:51 +0200")
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To: Walter Franzini <walter.franzini@gmail.com>
Cc: guix-devel@gnu.org

ludo@gnu.org (Ludovic Court=C3=A8s) skribis:

> Walter Franzini <walter.franzini@gmail.com> skribis:
>
>> On Mon, Oct 14 2013, Ludovic Court=C3=A8s 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=E2=80=99t =
know
> about it.

I probably wasn=E2=80=99t 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=E2=80=99s =
those
files that were removed.  The symlinks were still there, just dangling.

Ludo=E2=80=99.