I have a rooted custom device (Android 8.0), I can use adb
and run su
and do whatever I want in the shell. But SuperSU or any other app cannot find root. I have made a symlink from /system/xbin/su
to /system/bin/su
but it still does not work.
1 Answer
/system/xbin/su
is a normal su
binary that's shipped with userdebug
or eng
ineering builds of ROMs. It gets you root access by making syscall setuid
. On the other hand, with SuperSU or Magisk root, a special binary is placed at /system/bin/su
(or some other path) which works quite differently. For details see How Magisk works?.
So, with only a working /system/xbin/su
executable, your device isn't essentially "rooted". SuperSU or Magisk won't work with this binary. And so the apps cannot get root access.
RELATED: What special privileges “/system/xbin/su” does have w.r.t. root access?