Looking for a good database shutdown script for Unix

At the present time, we run ~oracle/bin/dbshut before shutting down the underlying Unix system. This script does a sqldba "shutdown" command for each database listed in oratab.

But recently we've encountered some sort of hang problem where the database gets seriously confused, and a standard sqldba "shutdown" command hangs forever. We then have to kill off sqldba, and manually kill the associated oracle processes. Yuck. :-(

I'm wondering if anybody out there has implemented an Oracle shutdown script that is smarter about shutting down hung databases. I.e. one that tries
"shutdown normal", and if it is still hung after x seconds, kills that attempt,
and then escalates to "shutdown immediate" or even "shutdown abort".

Please post or e-mail; I'll summarize any e-mail replies. Thanks.

-- 
Mark Bixby                         Internet: markb_at_cccd.edu
Coast Community College District   1370 Adams Avenue
District Information Services      Costa Mesa, CA, USA  92626
Technical Support                  (714) 432-5064


"You can tune a file system, but you can't tune a fish." - tunefs(1M)