Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!rochester!kodak!ektools!jwr
From: jwr@ektools.UUCP (Jim Reid)
Newsgroups: comp.unix.wizards
Subject: What SHOULD go in the kernel
Keywords: device drivers
Message-ID: <2186@ektools.UUCP>
Date: 17 Oct 89 16:13:47 GMT
Sender: jwr@ektools (Jim Reid)
Reply-To: jwr@ektools.UUCP (Jim Reid)
Distribution: na
Organization: Eastman Kodak, Dept. 47, Rochester NY
Lines: 18
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Unix wizards,

I have some general questions concerning writing Unix device drivers:

Is there a rule of thumb of what should and should not be put in the
kernel?  To be more specific, is it better to make a device driver 
'lean-and-mean' or sophisticated, so that the user interface (the read(),
write(), ioctl()) is simpler?

What are the pros and cons of each?

Thanks for your time.

-- 

Jim Reid
Eastman Kodak Company
UUCP:   ...!rochester!kodak!ektools!jwr