Re: config(5) break down

[Matt Thomas <matt%3am-software.com@localhost>]

On Mar 20, 2010, at 9:06 AM, Masao Uebayashi wrote:

> On Sun, Mar 21, 2010 at 1:01 AM, Matt Thomas 
> <matt%3am-software.com@localhost> wrote:
>> I'm talking about <maj, min> to device.  How, as a user, do I know what 
>> actual tty does /dev/ttyXX open?
> 
> If we make tty(4) a device, we can lookup its parent by drvctl(8)
> (extend it to return dv_parent).

That is user unfriendly.  The name in /dev should tell me enough to know what 
it is.
I should not have to invoke another command to figure that out.

> 
> My question is - is this the only reason why each serial driver has
> its own device entry?

It is the primary reason.  And it's a good reason.