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From: mah@dec1.wu-wien.ac.at (Michael Haberler)
Newsgroups: comp.sources.wanted,comp.periphs.scsi
Subject: Re: Source code to manipulate SCSI command descriptor block
Message-ID: <1991Feb12.150751.29404@nestroy.wu-wien.ac.at>
Date: 12 Feb 91 15:07:51 GMT
References: <1991Jan23.174708@kboeng.enet.dec.com>
Sender: usenet@nestroy.wu-wien.ac.at (The Usenet User)
Reply-To: mah@nestroy.wu-wien.ac.at
Organization: Wirtschaftsuniversitaet Wien
Lines: 30

In article <1991Jan23.174708@kboeng.enet.dec.com>, heiden@kboeng.enet.dec.com (Matthias Heiden) writes:
|> 
|>    I need to write software (pref. C) to exercise basic and advanced SCSI
|>    functionality. I need higher level routines which would interactively
|>    enable me to talk to the SCSI device by setting up the command descriptor
|>    block.

That depends on the OS and SCSI driver you're using. If you have a HP9000/300
with a SCSI board around, its fairly easy; there's a special ioctl(2) 
call which allows you to send an arbitrary SCSI command to a device, and
get it's reply.

I found this idea much more useful than having a bunch of special ioctl's 
for formatting, reading capacity and the like. I hope more manufacturers
adopt this idea; it makes it very easy to write userland programs to talk
to weird devices or cause special functions in a device the original 
author of the driver did'nt think of. 

I dont know of any other brands of SCSI drivers which support something along
these lines (btw: couldnt you talk your DECstation folks to implement such an
animal?). 

- michael

|>    I guess (or my hope is that) similar tasks have already been done and
|>    that I could build upon this experience before reinventing such an
|>    application. Any hint or pointer to existing software is greatly
|>    appreciated.
|>    Thanks in advance,		Matthias Heiden
|>