lftp error codes

[Sorin Sbarnea]

Where can I find a list of the error codes (return values) for lftp?
I checked the documentation but I wasn't able to find.

All I know is that 0 means success but I need to know the other codes
in order to be able to use lftp for automating transfers.

Thanks,
--
/sorin
http://nusunt.eu