*Facepalm* I finally got to test it in my boot-shell /sbin/preinit mod, and... it segmentation faults. Works just fine outside of that shell. Just breaks in the utterly basic environment provided by my /sbin/preinit shell.

Anyone mind checking if this works in pali's recovery shell bootmenu item?

- Edit -
I would've tested earlier, even before posting, but the then-current busybox shell wasn't capable of running that early in the boot due to the interim file-in-tmp solution to the history bugs.