I just started reading up on screen is a awesome solution. I am very surprised that I haven't heard of it before. The only thing don't like about this is that I can't then start the server with a arc equivalent of mysqld_safe which will restart it if it crashes. I would want to be able to have this for a production server. Wonder if it would be possible to scrape a script together that can do that while still dropping you into the repl, and still create a pid file. Any ideas because I usually just launch things like this in the background, which is easy to do.
I wasn't quite able to tell from your description what is the missing piece for you: is it starting Arc inside of screen at server boot time, or restarting Racket/Mzscheme if it crashes?
I think what you want is for server boot to run screen, which runs a shell script that starts/restarts Arc, which writes its pid out to a pidfile. Does that sound about right? Each step in that process is pretty easy.
