"losetup -f" does nothing
"mknod /dev/block/loop100 -b 7 100" works but losetup won't use it
"losetup /dev/block/loop100 someImageFile" does nothing
"losetup" run after all that doesn't list /dev/block/loop100
su does work. It is my own build with KonstaT's patches but I did try using busybox from his 2012-11-16 build. Same results.
I guess I'll have to recompile busybox or something.