On Tue, Jul 03, 2007 at 06:40:02PM +0000, Christos Zoulas wrote:
> David Laight  <david@l8s.co.uk> wrote:
> >There is code in compat/svr4/svr4_net.c that (I suspect) is implementing
> >the SVR3/4 'clone' device driver [1].
> >
> >For pseudo ttys it calls svr4_ptm_alloc() which loops through some
> >/dev/ptyXX names then returns EMOVEFD in order for TRT to happen back
> >in sys_open().
> >
> >I suspect that call to svr4_ptm_alloc() could be replaced by a call to
> >ptmopen() (in kern/tty_ptm.c) and it would all still work.
> >
> >Is that correct? and should it use minor 0 or 2 ?
> 
> Yes, it should be done this way.

Actually I've had a further thought...
Is there anything that helps you setup the /emul/xxx/dev for the svr4
emulations ?

It seems easiest to just point the /dev/ptmx entry at netbsd's ptmx
driver (but I do think you want minor 2).  You also need to setup
the /dev/pts/nnn (or /dev/ptsnnn for older svr4) entries.

In which case the code in compat/svr4/svr4_net.c (for ptmx) can just
be deleted.

	David

-- 
David Laight: david@l8s.co.uk