Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!lll-winken!elroy.jpl.nasa.gov!ncar!gatech!kd4nc!km4ba!alan
From: alan@km4ba.UUCP (Alan Barrow)
Newsgroups: comp.sys.hp
Subject: Re: How do I shutdown an HP9000/332 on orders from a UPS.
Message-ID: <230@km4ba.UUCP>
Date: 15 Jan 91 07:12:27 GMT
References: <98@cscdec.cs.com> <63300022@hpl-opus.hpl.hp.com>
Organization: km4ba's packet radio gateway, Atlanta GA.
Lines: 28


In regard to various signals, I seem to remember that you
can specify which signal to use from killall. Since I
believe that shutdown uses killall, you could do a "lightweight"
kill, wait a while, then do a serious kill (-9, which is default
for killall, I think).

Again, you are dealing with the lesser of evils:
   (your program)-
   hostile termination
      VS
   (powerfail w/o shutdown)-
   multiple hostile termination
   unclean disks
   etc.

BTW, there is a signal associated with pwrfails. Your 
UPS watcher could send this signal to init. init then
takes action with a new state, and a script.

It is discussed in init(1m), I believe.

Good Luck!

Alan Barrow (km4ba)
..!gatech!kd4nc!km4ba!alan

These thoughts are mine, not my employer's!