This is derivative of daemontools from DJB, one of the more elegant pieces of unix'isms I've ever used and a key piece of many large infrastructures in many startups.

Anyways, it's a neat idea... Other derivative tools like runit and s6 are all slightly more modern pieces of software built on top of, or replacing parts of ucspi-tcp and daemontools. This is yet another... and assuming it's well written, probably pretty good.

Daemontools: http://cr.yp.to/daemontools.html

> This is derivative of daemontools from DJB

I am not sure I understand your statement. Anopa is built on top of S6.

S6 is derivative of daemontools. Without daemontools, S6 wouldn't exist. Daemontools created the svscan /service run/down log/run dichotomy.

That's all. These are all from a lineage, direct or indirect, of an incredible piece of software engineering (daemontools).

Does any distro use it?

you mean as its default init system? I don't think so (unless you consider LFS a distribution), but it's available for many distributions plus it seems like a good init system for containers, etc.