[RK3399] [Android 7.1] 添加系统root权限

1.添加开机启动服务

rk3399/device/rockchip/common$ git diff init.rockchip.rc
diff --git a/init.rockchip.rc b/init.rockchip.rc
index a0ade29..b202580 100755
--- a/init.rockchip.rc
+++ b/init.rockchip.rc

+#lance root
+service daemonsu /system/xbin/daemonsu --auto-daemon
+   class main
+   seclabel u:r:su:s0
+
+on property:sys.boot_completed=1
+       start daemonsu

rk3399/device/rockchip/common$ git diff sepolicy/file_contexts
diff --git a/sepolicy/file_contexts b/sepolicy/file_contexts
index 728d4bc..0f45c30 100755
--- a/sepolicy/file_contexts
+++ b/sepolicy/file_contexts

+#myshell
+/system/xbin/daemonsu u:object_r:shell_exec:s0

2.新建root目录，将压缩包中arm64里面相应文件拷贝过来
libsupol.so    su    supolicy

3.device.mk中添加拷贝工作

rk3399/device/rockchip/rk3399$ git diff device.mk
diff --git a/device.mk b/device.mk
--- a/device.mk
+++ b/device.mk
+#copy  root
+PRODUCT_COPY_FILES += \
+       $(LOCAL_PATH)/root/libsupol.so:system/lib64/libsupol.so \
+    $(LOCAL_PATH)/root/su:system/xbin/su \
+    $(LOCAL_PATH)/root/su:system/xbin/daemonsu \
+    $(LOCAL_PATH)/root/supolicy:system/xbin/supolicy 

4.编译烧录安装apk测试，

注：
如果不行先检查服务是否开启，    dmesg | grep daemonsu
打开su apk，会提示更新二进制文件，点击取消。
注意：supersu不要更新二进制，否则会造成无法开机。

文件及APK下载地址：

链接：https://pan.baidu.com/s/1mGzrOXUTi1gK58spuQyWHw 
提取码：uwnq