Subject: Re: How to support clone devices (i.e. /dev/tcp)
To: None <>
From: None <>
List: tech-kern
Date: 11/15/1994 12:04:08
   The key to it is that the first arg is a pointer to a dev_t
   that the driver may modify during open.

That only works if you're cloning actual devices.  The SVR4 code is
cloning devices into sockets, which would at best require a special
case given the interface you proposed.