Re: TTY changes to 2.1.65

Rik van Riel (
Thu, 27 Nov 1997 14:19:30 +0100 (MET)

On Wed, 26 Nov 1997, Richard Masoner wrote:

> > The implementation should be fairly simple... all syscalls to devices
> > with the "generic" major would get multiplexed (based upon their
> > minor) to the "real" major handler,
> Nice idea; unforunately the number of bits in the minor number is
> already a limiting factor in Linux.

We could implement /dev in the same way we implement /proc...
Device drivers can register/unregister their device files in
/dev and they get assigned a 'device number' for each device
they allocate (no need for major/minor numbers)

For devices that are compiled-in some script in /etc/rc.d
could change the permissions to the wanted ones.
Loadable modules could get the dev_perm=0600 or whatever
as a command-line option (from /etc/conf.modules).

This would probably cost us 10 to 20 k of kernel-mem, but
that's a small price to pay (even on a 4M machine) for
making things _work_ in all circumstances...

No need to ever assign major/minor numbers again would
also help people who built a custom device driver or
made a kernel-patch for some driver (without registering
a major with Linus).

comments wanted,


Send Linux memory-management wishes to me: I'm currently looking
for something to hack...