[plt-scheme] Finding out the script name

Hi,

Is there a function/variable in PLT scheme that gives you the filename of
the script that is being executed?
I mean if I have an (executable) file "script.ss" and call it:
./script.ss
and I would want this script to, say, print its name.
In bash/perl this would be in the $0 variable, what about PLT scheme?
Thanks.

Grzegorz