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From: parker@mprgate.mpr.ca (Ross Parker)
Newsgroups: comp.unix.admin,comp.unix.questions
Subject: Re: Is there something like 'shutdownrc' at SunOS 4.1 ?
Message-ID: <1991May27.231843.17196@mprgate.mpr.ca>
Date: 27 May 91 23:18:43 GMT
References: <138@speedy.ada.cci.de> <1991May25.122537.19449@thunder.mcrcim.mcgill.edu>
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In article <1991May25.122537.19449@thunder.mcrcim.mcgill.edu>, mouse@thunder.mcrcim.mcgill.edu (der Mouse) writes:
|> In article <138@speedy.ada.cci.de>, smeets@speedy.ada.cci.de (Vincent Smeets) writes:
|> 
|> > I am using SunOS 4.1 and I want to execute some commands just before
|> > the system is going down (shuting down Oracle and Teamwork).
|> 
|> That's why shutting down sends a SIGTERM to everything.  Processes that
|> need to clean up after themselves should catch it and do whatever they
|> feel they must.

Definitely... unfortunately, init isn't as smart as we'd all like at times...
(see next comment...)

|> Not that I know of.  If the commands in question execute fairly
|> quickly, you could write a daemon which sleeps waiting for a SIGTERM
|> and then runs whatever needs to be run.

Unfortunately, init will not wait for all processes to die... only ones
that it deems worthy of it's attention. I went through this exact problem
a couple of months ago (trying to shut down Oracle), and eventually gave
up. I had tried what you suggest - init will blast a SIGTERM at the daemon,
but it will merrily continue on and take the system down. Databases take
toooooo long to shut down!


|> 					der Mouse
|> 
|> 			old: mcgill-vision!mouse
|> 			new: mouse@larry.mcrcim.mcgill.edu

-- 
Ross Parker			| Why do they put me down?
				| Make out that I'm a clown?
parker@mprgate.mpr.ca		| I drink scotch whisky all day long
uunet!ubc-cs!mprgate!parker	| Yeah I'm gonna save my money
				| (gonna put it all away...)
(604)293-5495			| 'Cause I'm a Scotsman