svn commit: r198768 - head/sbin/mknod

[Dag-Erling Smørgrav]

Ed Schouten <ed at 80386.nl> writes:
> > Dag-Erling Smørgrav <des at des.no> writes:
> >   identified an individual device handled by that driver.  FreeBSD no
> >   longer makes that distinction; each device has a unique system-wide
> >   minor number, and the major number is always zero.  However, the
>                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> As pointed out earlier, this is not true. Major numbers can be non-zero.
>
> | #define major(x) ((int)(((u_int)(x) >> 8)&0xff))
>
> Devices 256-511 will have a major number of 1, etc.

So:

  Each device has a unique system-wide device number; the minor number
  contains the eight least-significant bits, and the major number
  contains the rest.

(device numbers are currently unsigned int; is there a reason not to
make them explicitly 32 bits wide, i.e. uint32_t?)

> Apart from that, I think there is also a fair amount of overlap with the
> COMPATIBILITY section of the same manpage.

Yeah, but who reads those?  :)

DES
-- 
Dag-Erling Smørgrav - des at des.no