[comp.sys.sgi] question about major device ID

psomu@pilot.njin.net (Prabhakar Somu) (02/18/91)

Hi,
	In Irix 3.3.1 (on 4D70GT) the file "/usr/include/sys/major.h"
says that the Major device ID numbers 60 to 79 are reserved for customer
use. We have a driver which uses a Major device ID of 99 (this was 
written earlier). I noticed that major.h did not exist on 3.2 . Are the
restrictions on Major Device ID's new to 3.3.1 and, is there a problem with
using a non reserved major ID ? 

Thanks,
/somu	somu@mirage.umdnj.edu
		or
	psomu@pilot.njin.net
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olson@anchor.esd.sgi.com (Dave Olson) (02/19/91)

In <Feb.17.20.05.45.1991.19282@pilot.njin.net> psomu@pilot.njin.net (Prabhakar Somu) writes:

| Hi,
| 	In Irix 3.3.1 (on 4D70GT) the file "/usr/include/sys/major.h"
| says that the Major device ID numbers 60 to 79 are reserved for customer
| use. We have a driver which uses a Major device ID of 99 (this was 
| written earlier). I noticed that major.h did not exist on 3.2 . Are the
| restrictions on Major Device ID's new to 3.3.1 and, is there a problem with
| using a non reserved major ID ? 

The equivalent comment used to be directly in /usr/sysgen/system.
I would strongly suggest you change your major #, as 99 is used
(for an optional board) in the next release.
--

	Dave Olson

Life would be so much easier if we could just look at the source code.