Android TV autostart script I want to run a script after booting from a Android TV box (Xiaomi Mi Box)
I tried a lot but nothing works. Is there any option to 'activate' an init.d folder?
You could go with automation to accomplish this. 

There are several candidates for this e.g Macrodroid (free up to 5 macros) , Tasker (free 7 day trial) etc (but I am an intermediate user of the the latter hence prefer it)

Profile (or Trigger)

Create a Profile which allows triggering of the Task after boot:


Go to Profiles Tab and click the "+"
Event ➡  System ➡  Device Boot
Tap back to exit from this window


Task

You will notice as soon exit, you will be prompted to link this to a Task


Scroll all the way up the Task list select "New Task + "
You can name this Task anything (optional).
Click "+" to add new Action
Code ➡ Run Shell [ Command (enter script command) , Tick "Use Root" if it needs root]
Tap back to exit from this task


Explanation: Soon after boot, your predefined script will be executed by Tasker