https://github.com/bakkot/unix-socket-protobuf/tree/master/CPP/src
https://github.com/bakkot/unix-socket-protobuf/blob/master/CPP/src/server_sync.cc
https://github.com/bakkot/unix-socket-protobuf/tree/master/CPP/src
https://github.com/bakkot/unix-socket-protobuf/blob/master/CPP/src/server_sync.cc