Snooping Digiboard ttys

[Annihilannic]

Hi everyone,

I know a number of you use this Digiboards for multiple serial interfaces - does anyone know how you can snoop the data that is being transmitted and/or received through these interfaces?

We use them to connect to some manufacturing hardware and need to do a bit of troubleshooting.

Any help greatly appreciated. Annihilannic.

 

[edfair]

Have never snooped inside the OS. When I need to know what is transferring I use a laptop in parallel with the device and look at the data coming in or going out. I match the BR and connect incoming and signal ground to ground and whichever signal I need to see. Ed Fair
efair@atlnet.com

Any advice I give is my best judgement based on my interpretation of the facts you supply.

Help increase my knowledge by providing some feedback, good or bad, on any advice I have given.

 

[Annihilannic]

Thanks Ed.

I think they've isolated the problem now (cabling). I managed to compile the Linux tool ttysnoop-0.12c under OSR505, but it's designed to be a drop-in replacement for /bin/login.

It recommends modifying either the getty or telnetd configuration to execute ttysnoop instead, but neither I nor SCO tech support could figure out how to do this... any ideas (purely for curiosity's sake?). Annihilannic.

 

[Annihilannic]

SCO Tech Support came to the rescue. ftp://ftp.sco.com/TLS/tls604.tar.Z provides a utility called spyfs-1.1 that allows you to monitor tty IO. Annihilannic.