su(1) bug

[Eric C. Pearce]

A similar su bug exists if you su from inside a Gnu emacs subshell, the su
attempt is then from "(null)".

     - Ecp

       Eric C. Pearce, Yerkes Observatory, University of Chicago.
       pearce at tycho.yerkes.uchicago.edu  or  pearce at oddjob.uchicago.edu