auto interactive jobs

[Bitfox <hi@bitfox.ddns.net>]

Hi

I have a interactive command like the following,

$ ./filen
/ > upload upt-snappy /
Uploading upt-snappy [========================================] 100% | 
ETA: 0s | 1.4 KiB / 1.32 KiB
/ >


the command "filen" will open a interactive shell, and in this shell to 
upload/download files.

How can I write a script for this case to upload file automatically?

Thanks.