- loops would fail only in LOS Recovery from direct mount .img and losetup .img+loop mount with, e.g. "mount: mounting /dev/block/loop0 on /apex/com.android.adbd failed: Invalid argument"
- this started ~LOS19, I believe, though I haven't tracked down the specific change yet
- confusing to diagnose, since it always works in recovery adb shell, until I realized there was a context difference: "su" for adb shell and "recovery" for zip flashes
- switch shell context temporarily to "su" to do apex mounts, then return to original context (currently only necessary for mounting loops)
osm0sis
c878b3e62b