The thing is, the web stack is not how to do it (for a prototype, maybe).

As they say above, this thing would halt when you cat a 50MB file.

It takes someone who's familiar with terminals, and can use a language fit for the task (and without too many depenedencies -- so if you built it in Haskell and I need the Platform and half of Cabal to build it, it will never fly -- and it being in Haskell it will not attrack many UNIX hands, who are the people familiar with Terminals most).

So something like C, C++, Rust or Go.