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bug#32413: 25.2; When run as root, emacs writes dconf files in a non-roo

From: Eli Zaretskii
Subject: bug#32413: 25.2; When run as root, emacs writes dconf files in a non-root user's /run/user/XXX directory
Date: Fri, 10 Aug 2018 16:47:17 +0300

> Date: Fri, 10 Aug 2018 14:57:58 +0200
> From: Vincent Lefevre <address@hidden>
> Cc: address@hidden
> > > Emacs should never create files/directories if the user hasn't
> > > explicitly asked it to do that
> > 
> > I don't agree with this principle, not in this general form.  (The "in
> > a directory owned by another user" part, to which I think I agree, as
> > written, was not a qualification for this general statement, so it
> > doesn't count for the purposes of the principle itself.)
> > 
> > As just one random example of what Emacs "should never do", we write
> > the customizations to a file "without the user's explicit request".
> I don't understand why there is anything to write if the user
> hasn't customized anything.

That was just an example of something that doesn't explicitly ask for
writing a file.  Another example is Eshell: when it exits, it writes
files in the ~/.eshell directory.

More generally, certain Emacs features might write files "without user
explicitly asking" as part of providing some feature that needs to be
persistent between sessions.  I think that's quite allright, which is
why I disagree with the general principle you were trying to

> And if the user introduces some customization, then this can be
> regarded as an explicit write operation (due to the action of the
> user in this sense).

Well, in that case, let's regard user using dconf as an explicit write
permission ;-)

Seriously, though: if your principle can be subverted in some
situations, then we need to define what situations are those.  In
particular, how is what you report different from what Eshell does on

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