Filemode of a closed file

[GZ at MIT-MC (Gail Zacharias)]

There doesn't seem to be a way to get the open-specs (i.e. stuff like 
IN/OUT/APPEND, ASCII/FIXNUM, SINGLE/BLOCK) of a closed file.  The stuff is
obviously there since defaulting for re-opening uses it.  As it is, I need
to re-open the file to get this info, and this doesn't work right for a
">" type file opened in OUT mode (since the version number gets bumped by
one upon re-opening)