device_phh_treble/phh-securize.sh

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#!/system/bin/sh
if [ -e /system/bin/magisk ]
then
# remove bind-mount of phh-su overriding /system/bin/su -> ./magisk
umount -l /system/bin/magisk
# we need to modify the real system partition
MAGISK_MIRROR="$(magisk --path)/.magisk/mirror"
SYSTEM=$MAGISK_MIRROR/system
MOUNTPOINT_LIST="$MAGISK_MIRROR/system_root $MAGISK_MIRROR/system"
else
SYSTEM=/system
MOUNTPOINT_LIST="/system /"
fi
# remove bind-mount of phh-su (preventing $SYSTEM/xbin/su to be removed)
umount -l /system/xbin/su
for MOUNTPOINT in $MOUNTPOINT_LIST
do
[ -d $MOUNTPOINT ] && mountpoint -q $MOUNTPOINT && break
done
mount -o remount,rw $MOUNTPOINT
remount
touch $SYSTEM/phh/secure
rm $SYSTEM/xbin/su
rm $SYSTEM/bin/phh-su
rm $SYSTEM/etc/init/su.rc
rm $SYSTEM/bin/phh-securize.sh
rm -Rf $SYSTEM/{app,priv-app}/me.phh.superuser/
rm -Rf /data/su || true
mount -o remount,ro $MOUNTPOINT
sync
mkdir /metadata/phh
touch /metadata/phh/secure
reboot