From owner-freebsd-questions  Mon Jul  7 15:18:00 1997
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	Mon, 7 Jul 1997 16:23:43 -0600 (MDT)
Date: Mon, 7 Jul 1997 16:23:43 -0600 (MDT)
From: John-David Childs <jdc@denver.net>
To: chaos@tgci.com
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On Mon, 7 Jul 1997, Riley J. McIntire wrote:


> Now I get this:
> 
> su-2.00# ls -l /dev/snp*
> crw-------  1 root  wheel   53,   0 Jul  7 13:14 /dev/snp0
> su-2.00# who
> rileyj   ttyp0   Jul  6 15:14  (my ip stuff)
> rileyj   ttyp1   Jul  7 12:50  (my ip stuff)
> su-2.00# watch ttyp0
> Fatal: Cannot open snoop device.
> su-2.00#

OOPS...I should have read more closely before writing...
You also need to run the watch program as root (in addition to making
sure that you use the path:   watch /dev/ttyp0)