How to mail the name of the user that logged off?

[Bruno Wolff III]

On Tue, Sep 25, 2007 at 23:05:54 -0600,
  Frank Cox <theatre at sasktel.net> wrote:
> On Tue, 25 Sep 2007 23:11:40 -0500
> Bruno Wolff III <bruno at wolff.to> wrote:
> 
> > It won't work against hostile users unless you also change ownership of
> > their home directory. Otherwise they will be able to delete the file.
> 
> A little further down in the thread, I think we got 'er beat with chattr.
> 
> At least, I haven't seen anyone come up with a good counter for that one so
> far....

I think kill -9 will work around it. The shell runs as the user, so it shouldn't
be able to trap that signal.