The link you provided clearly states that both back-device (the real device) and front-device (the pseudo-tty to which the application to be monitored will connect). You have specified only one.

Moving this topic to Social as it is not specific to any CentOS version, nor even to CentOS.

I am new to Linux so please bare with me.

I need to log all communications between an application and the serial port on the same system.

I did a little research and found an application called Interceptty that looks like it will do the trick. However, I'm having issues determining the proper sytax.

Here is a link to the Interceptty webpage...http://www.suspectclass.com/sgifford/interceptty/interceptty.html

Here is the command that I thought would work...
"Interceptty /dev/ttyS0 -o test.txt". It does execute, holds on the command line and creates the output file, but nothing gets logged to the file. I've tried several command line variations to no avail. I also sent an email to the author, but got a bounceback.

Like I said, I'm new to Linux so I'm sure this will probably be easy one for you guys.


Thanks!