Tor cleverness?

[Geoff Down]

Hi,
two questions:
I renamed (with 'mv') the file I was sending Tor logs to whilst Tor was 
running.
I actually moved it to a different directory.
The log data kept being written to that file. How?
Secondly, does sending a USR2 signal to Tor 0.2.0.31 (r16744) switch on 
debug level logging as stated in the manual? I've tried it and it seems 
not to work - except I got some debug-level entries after I sent a 
shutdown signal.

Thanks,
GD