I'm trying to add support for termux on some device provisioning scripts.

first thing is to properly detect termux. is looking for env var TERMUX_VERSION the right way? or some file/dir would be better?

secondly, how can i get a unique identifier for the device? else where (windows/linux/bsd/osx) i just use the hostname. I see some people using getprop net.hostname but that returns an empty string on all my devices.