Path of print job data through Samba?

[Steve Snyder]

Can someone please point me to an overview on how printing works with
Samba v2.0.5a?

As far as I can tell, there are 3 directories involved when printing
to a Samba-shared printer on a Linux system:

	/tmp/
	/var/spool/samba
	/var/spool/lpd/printername/
	
I was under the impression that incoming files were written to /tmp,
then copied to the printer-specific directory, then printed.
Obviously this understanding is wrong because I just found the
remnants of a couple old print jobs in /var/spool/samba.

So what's the story here?  Exactly what path does a file take from
client machine to shared printer?

Thank you.

*** Steve Snyder ***