Even if you umount /proc, it will remain until active process references to
/proc nodes are closed. If one tries umount /proc outside of a shutdown
sequence, Emacs is the least of her worries. This is not a practical
deterrent.

On Wed, Sep 18, 2024 at 11:09 PM Po Lu <luangruo@yahoo.com> wrote:

> Eli Zaretskii <eliz@gnu.org> writes:
>
> > And I will see your humility and raise ya.  Please describe your ideas
> > for the patch before actually writing the code.  Because there's more
> > here than meets the eye.  Some issues the related code needs to
> > handle:
> >
> >   . what if /proc/self/exe is unreadable? AFAIK, on some systems you
> >     need special privileges to follow its symlink
>
> Above all, /proc is liable simply to be unmounted.
>