How to write to a file in the Directory "/sys/....."

Question

How can i edit the file in the sys directory using JNI and NDk in android. Actually i Need to edit these file "/sys/class/gpio/gpio41/value".

Answer 1

By changing the mode you can now edit the file using: chmod 777 /sys/class/gpio/gpio41/value

Answer 2

just a little hint: use chmod 666 ... You will get read/write permission but you don't need execute permission on HW-pins.

Regards Martin