tail a log file in Robot Framework

I want to open a file and tail -f the output. I'd like to be able to open the file at the beginning of my test in a subprocess, execute the test, then process the output starting from the beginning of the tail.

I've tried using Run Process, but that just spins, as the process never terminates. I tried using Start Process followed by Get Process Result, but I get an error saying Getting results of unfinished processes is not supported.

Is this possible?