Capture ^C and ^D to exit

[oubiwann]

Right now, a SIGINT or SIGTERM don't seem to executing the full termination sequence when run via rebar3 and the LFE REPL. Both OS processes for sendmidi and receivemidi remain running. Note that calling (exit) from the REPL does go through the proper termination sequence (but only sendmidi is killed; receivemidi remains running).

Areas to investigate:

• [ ] Erlang kernel config - http://erlang.org/doc/man/kernel_app.html#erl_signal_server
• [ ] Erlang set_signal - http://erlang.org/doc/man/os.html#set_signal-2
• [ ] rebar3 and signal handling / overrides (?)

Related to #88

Part of epic #80

[oubiwann]

Great write-up on signal handling in OTP:

• https://medium.com/@ellispritchard/graceful-shutdown-on-kubernetes-with-signals-erlang-otp-20-a22325e8ae98

[oubiwann]

That being said, maybe the issues with fully terminating OS processes ...

[a few hours later]

Yup!

Closing ...