D-Bus is a free software project which offers a simple way for applications to communicate with one another. It is developed by Red Hat as part of the freedesktop.org project. - Wikipedia
D-Bus官方网站 https://www.freedesktop.org/wiki/Software/dbus/
D-Bus tutorial https://dbus.freedesktop.org/doc/dbus-tutorial.html
D-Bus specification https://dbus.freedesktop.org/doc/dbus-specification.html
dbus 进程间通信 https://fengchao.github.io/2016/05/21/dbus/
D-Bus 使用 中文文档 https://thebigdoc.readthedocs.io/en/latest/dbus/index.html
Exposing a D-Bus Interface in Linux — Part 1 https://medium.com/cesar-update/exposing-a-d-bus-interface-in-linux-part-1-90e68e754c72
Exposing a D-Bus Interface in Linux — Part 2 https://medium.com/cesar-update/exposing-a-d-bus-interface-in-linux-part-2-90374a9e381b