What is the approach to writing your own alternative to ethtool?

Question

linux

Information on driver settings options (with no way to access them) is here: https://www.kernel.org/doc/html/latest/networking/... . How to approach writing a program that will manage these driver settings (I did not find an API on the Internet)?

ethtool is a good option for administration. And I need opportunities for programming.

Answer 1

What is the approach to writing your own alternative to ethtool?

I see the main approach here as follows: do not create a bicycle in vain.