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Date: Wed, 21 Dec 1994 11:58:27 -0500
From: kelly@fsl.noaa.gov (Sean Kelly)
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To: herrmann@alliant.gsf.de
Cc: freebsd-questions@freefall.cdrom.com
In-Reply-To: <3d4gct$27r@cony.gsf.de> (herrmann@alliant.gsf.de)
Subject: Re: sio driver problem in FreeBSD-2.0R
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>>>>> "Guenter" == Guenter Herrmann <herrmann@alliant.gsf.de> writes:

    Guenter> - "stty -f /dev/tty00 <option>" comes back normally, but
    Guenter> subsequent "stty -a -f /dev/tty00" shows no changed
    Guenter> <option>.

Probably because the first stty opens the port, applies the option,
and then closes it.  And when it closes, its settings go back to
default.  The trick I've seen used is

	sleep 100000 </dev/tty00 & # keep port opened for a long time
        stty -f /dev/tty00 <blah>  # set option <blah>
        stty -a -f /dev/tty00      # shows changed <blah>

--k