Hi,

we are using a (commercial, but custom made) program on our Sun Ultra-5
(sol-v9), which is
not supported anymore ...
This program is communicating with a PC over a serial line (no comments
about this, please !).
Since we've run into problems recently, I'd like to debug this
communication.

Do I have a possibility to monitor, what is sent/received over the
serial line. I'm thinking of a program
that works analogue to the ones which can monitor network traffic.
Obviously that program need not
change or influence the serial port settings.

Roger

--
Dr. Roger Zimmermann *** Institute of Physiology, Hamburg
Martinistra/3e 52 D-20246 Hamburg Tel.: /40 42803 5351
-------------------------------- Fax.: /40 42803 4920
R.Zimmermann=at=Uke.Uni-Hamburg.de // roz=at=snafu.de
PGP-ID: Roger Zimmermann
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Dr. Zimmermann wrote:
> This program is communicating with a PC over a serial line (no comments
> about this, please !).
> Since we've run into problems recently, I'd like to debug this
> communication.
>
> Do I have a possibility to monitor, what is sent/received over the
> serial line.

You can always try truss. Here is an invocation that might
be suitable for your purposes:

truss -p pid -D -t read,write -r all -w all

If it does I/O on other files at the same time, you may want
to do a regular truss first to determine the file numbers
so you can use "-r" and "-w" to limit the display to just
what's going on the serial port.

Hope that helps.

- Logan