From owner-freebsd-hackers  Fri Jul 28 16:13:55 1995
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Date: Fri, 28 Jul 1995 16:12:36 -0700
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From: "Bryan O'Sullivan" <bos@Eng.Sun.COM>
To: "Jordan K. Hubbard" <jkh@time.cdrom.com>
Cc: Peter da Silva <peter@bonkers.taronga.com>, hackers@freebsd.org
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j> So how do you do "out of band" operations, like telling a tape
j> drive to skip forward to the next mark?

You have a control file associated with it.  As a hypothetical
example, a terminal would have one file for doing character reads and
writes, and another for reading and writing control commands like
set/get baud rate, and so on.

The system works pretty well, though I have a notion that retrofitting
something similar onto <insert-Unix-of-your-choice> would be pointless.

	<b