Add start to debug log (using tail)

[eluser]louis w[/eluser]
I am using tail so that I can watch the debug execute live in the terminal so I do not have to keep opening it.

Code:

tail -f 100 log-2008-04-22.php

I would like to add a debug message at the very beginning (or end) of the CI chain of log message so that I can easily see where the latest request started.

What would be the best way to do this without hacking the core.