Getting the most out of this device means we're going to have to get down and dirty. Last time we were in the land of the RG35XX H we were able to get root on the device and enable SSH. This time we want to start figuring out some of the stock menu features and implementing them ourselves, ideally in Go. Nothing against C, but Go is a higher-level language with many modern features and modern libraries that will be much nicer to work with when building software to replace the stock menu. I'm not an expert in Go so this will be a great learning opportunity as well.
So that's what it looks like, but what exactly is it? What binary is running? Figuring this out seems like it will be the key to understanding the device. We only have so many vendor-supplied binaries that take advantage of the hardware so we have will have dissect them carefully. Luckily we have root and SSH, so let's see what we can see.
My favorite process monitoring utility has got to be htop (of course I'm happy to receive new suggestions!). Let's see what it shows: