How do I capture ^C to do cleanup?

[feihong]

When I'm running my program and press ctrl+c to stop it, is there some way to capture that so my program can do a little cleanup? I tried using defer for this but that doesn't work if the whole program is terminated.

[andrewchambers]

I have a package that helps with this: https://github.com/andrewchambers/janet-ctrl-c - it requires the janet event loop to work and is currently linux only.