Re: firmlink deleting files on boot / interpretation of find -xdev switch

[Richard Braun]

On Tue, Sep 20, 2016 at 01:33:44AM +0200, Samuel Thibault wrote:
> I don't think we want to make /tmp use trustiness to determine whether
> to follow a translator or not.  If as root I run
> 
> settrans -c /tmp/foo /hurd/firmlink /some/where
> 
> I'd expect only foo to be removed.

If we want to stick to the Unix interface, and I strongly think we do
want that, then we'd need to make any translator visible as a separate
file system indeed. On my Debian jessie, the clean_tmp() in
/lib/init/bootclean.sh does use find -xdev, so this would work as
intended.

I don't know if that's already the case or not since Justus' work on
/proc/mounts. The work required here is to rely on the parent to report
whether a node is a separate file system. This could also break programs
assuming a file system is a directory if the attached translator
presents itself as something else.

-- 
Richard Braun