(Semi) permanently disable touch input

Question

I own a Samsung Galaxy S4 (GT-I9515L "jfvelte") running Lineage OS 16. It has a broken touchscreen which register random "ghost" touches.

I'm able to use it with the help of a USB mouse. To disable the touchscreen I use adb to open a shell on /dev/input and remove event3, which disables the touchscreen (renaming or moving the file doesn't work, only removing it) - until reboot.

How do I keep it disabled even after reboot? Preferably, I'd like a way that I can enable it later if I ever want to.

Answer 1

Turn's out there's init.sh support on Lineage (content of /etc/init.d/90userinit):

#!/system/bin/sh
# call userinit.sh if present in /data/local

if [ -e /data/local/userinit.sh ];
then
   log -p i -t userinit "Executing /data/local/userinit.sh";
   /system/bin/sh /data/local/userinit.sh;
   setprop lineage.userinit.active 1;
fi;

So I wrote a bash script that removes the /dev/input/event3 on boot, thus It disabling touch input on boot time:

/data/local/userinit.sh:

#!/system/bin/sh
rm /dev/input/event3

If I ever need to re-enable touch input, I can simply remove the bash script.