So it's busybox, rewritten or forked for some reason?

Edit: found it elsewhere in the thread. It's rewritten because they didn't like GPL for religious reasons. (Busybox is a completely separate binary from the rest of the system so there is no reason not to ship GPL-licensed software that I can see, but yeah if you've been bitten by making a closed source work derived from GPL once, I guess you don't want to try it again and Android has a lot of vendors with closed source components.)