First useful project in Rust: simple-osd-daemons

I've been interested in Rust for about two years now, and I have read the rust book and written some "hello worlds" with it to get a feel for the language. Recently I've had a thought: my desktop running Sway was missing a nice feature of full-blown desktop environments: on-screen display notifications for volume, brightness and battery. So, after a quick hoogle to make sure there isn't a Haskell binding for pulseaudio, I've decided that the time has finally come to use Rust for something useful. Here is the result:

https://code.balsoft.ru/balsoft/simple-osd-daemons

(A github mirror: https://github.com/balsoft/simple-osd-daemons)

Screenshot of pulseaudio daemon

It consists of four daemons at the moment: volume via pulseaudio, screen brightness, battery and bluetooth via bluez (however, the bluetooth daemon doesn't really work, see README). Each daemon can be started independently of others. There is also a library of sorts in common subfolder, it contains utilities for managing configuration files and sending/updating the notifications via libnotify.

There are some problems that I intend to fix during the next weekend, but it works and it fulfills my needs so thought I would share it with you in case somebody needs this too!

I know there are probably some programs that do the same thing, but better. However, this is more of a learning experience for me. If you have any suggestions on how to improve this, reply here, shoot an email at [email protected] or open a ticket on github. All feedback, whether positive or critical, is appreciated.

EDIT: Now that I re-read the title, it might come across as though my little thing is the first useful project in Rust ever; this was not the intended meaning, but it's impossible to change the title. It should read "My first useful project in Rust".