How to get directory of the file that's being run and asking for the directory.

So like I have a startup in a disk, how do I get the directory, like disk or disk2 or disk3 which the startup is in?
fs.getDir()? but I don't know how I can use it for this. Is it possible? if so, how? Thanks

Regards,
Augustas

For getting the running program you could just use

shell.getRunningProgram()

That should, for example, return "disk/startup".