zbus is a Rust crate for D-Bus. If you are not familiar with D-Bus, you should read what is D-Bus? first1. In short, zbus allows you to communicate from one program to another, using the D-Bus protocol. In other words, it’s an inter-process communication (IPC) solution. It is a very popular IPC solution on Linux and many Linux services (e.g systemd, NetworkManager) and desktop environments (e.g GNOME and KDE), rely on D-Bus for their IPC needs. There are many tools and implementations available, making it easy to interact with D-Bus programs from different languages and environments.
zbus is a 100% Rust-native implementation of the D-Bus protocol. It provides both an API to send and receive messages over a connection, as well as API to interact with peers through high-level concepts like method calls, signals and properties2. Thanks to the power of Rust macros, zbus is able to make interacting with D-Bus very easy.
zbus project provides two crates:
The zbus crate provides the main API you will use to interact with D-Bus from Rust. It takes care of the establishment of a connection, the creation, sending and receiving of different kind of D-Bus messages (method calls, signals etc) for you.
zbus crate is currently Linux-specific3.
D-Bus is ~15y old, unfortunately many documents out there are sometime aging or misleading.
These concepts are explained in the following chapter.