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Date:      Sun, 21 May 2000 13:03:06 -0400
From:      "Jeroen C. van Gelderen" <jeroen@vangelderen.org>
To:        Mark Murray <mark@grondar.za>
Cc:        Peter Wemm <peter@netplex.com.au>, Doug Rabson <dfr@nlsystems.com>, current@FreeBSD.ORG
Subject:   Re: Major device numbers and mem device redesign
Message-ID:  <392816CA.3A1E38E7@vangelderen.org>
References:  <20000521125308.3F48B1CE1@overcee.netplex.com.au> <200005211441.QAA16615@grimreaper.grondar.za>

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Mark Murray wrote:
> 
> > > > I want to commit a new /dev/random RSN, so I'll be needing a major
> > > > device; what is the procedure for getting one? I know how to steal one,
> > > > but ISTR that this is not how it is done.
> > >
> > > Just edit sys/conf/majors and claim the next available number.
> >
> > You don't need one. You can use the same major/minor numbers.  You can
> > register multiple cdevsw's per major number with make_dev();  (do NOT
> > use cdevsw_add() for this).
> 
> How does this work for all the routines? When you register the
> "new" minor number, can you be specifying new read/write/poll/ioctl/etc
> routines?
> 
> I ask, as my RNG is a kld, and I want it to be as separate as possible
> without getting ridiculous.

Have a look at http://jeroen.vangelderen.org/FreeBSD/misc_device .

Cheers,
Jeroen


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