It is not much of a useful security measure, since root can su - user
and take a look see anyway.

On Wed, Jun 3, 2020 at 10:13 AM Jonathan Billings <billi...@negate.org> wrote:
>
> On Tue, Jun 02, 2020 at 04:38:17PM +0100, Patrick O'Callaghan wrote:
> > $ sudo lsof /raid
> > lsof: WARNING: can't stat() fuse.gvfsd-fuse file system /run/user/1000/gvfs
> >       Output information may be incomplete.
> > lsof: WARNING: can't stat() fuse.portal file system /run/user/1000/doc
> >       Output information may be incomplete.
> >
> > Not sure why I'm getting gvfs errors. I do seem to be running some GVFS
> > stuff for some reason (my desktop is KDE though I do have some GTK
> > programs such as Firefox):
>
> This is just a red herring.  lsof, running as root, can't poke around
> in the gvfs mounts for a user.  The FUSE mounts for gvfs is locked
> down so only users can get at them, as a security measure.  lsof looks
> at all processes, including the gvfs ones.
>
> --
> Jonathan Billings <billi...@negate.org>
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