promasterUltra

Yes, you are right, I am trying to create a smaller version of sysvinit compatible with busybox's init. There is still no shell scripting yet, but I do promise to make the shell fully compatible with other shells with shell scripting in a future version.

What happened to RustyBox? c2rust is way easier than doing it manually, then why is it abandoned?

It could with a few tweaks, but it lacks features when compared to bash and busybox ash. For example, it doesn't support shell scripting, configuration file initialization, etc. I wouldn't recommended it right now though since it doesn't have most features of a standard shell but if you want to test it out, give it a try.