Posts

Intro 🚌 D-Bus is a message bus system and standard for inter-process communication, mostly used in Linux desktop applications. Both Qt and GLib have high-level abstractions for D-Bus communication, and many of the desktop services we rely on export D-Bus protocols. Also the omnipresent systemd can be only interfaced via D-Bus API. However, D-Bus has its shortcomings — namely a lack of documentation. In this article we’ll explore how to write our own D-Bus Service in Rust and connect it to our D-Bus client. ...

Intro The Thinkpad P15 laptop is a nice linux machine, but there is an annoying detail, as Arch wiki writes: “The default operation of fans is noisy, as they are basically at medium power all the time. The thinkfan program can be used to create a quieter operation, while retaining reasonable temperatures.” . Let’s make it quieter. Prerequisite Install thinkfan rpm package and enable the daemon: # zypper in thinkfan && systemctl enable --now thinkfan Make sure modules are loaded at startup with the options to override fan control and enable experimental features: ...

Intro Unit testing of Bash functions involves the process of systematically verifying the correctness and reliability of individual functions within a Bash script. While Bash is primarily used for scripting and automation, it’s important to ensure that the functions within your scripts work as expected, especially as scripts become more complex. Unit testing in Bash can help catch bugs and prevent unexpected behavior. Fixing bugs Working on a bugfix for an internal shell script, I wanted to add some unit tests to ensure correctness. After a quick search, I found this single-file “framework” (thanks, Ryan) that provides xUnit-style assertions. So we can use it as a starting point. ...

The problem When we write our programs or libraries, usually we ship to the end user a packaged binary. If a user wants to report a bug or ask for a feature, one of the most important information to have is “which version of the software are you using ?” Since as any good programmer you likely use a source code control system, you should not rely only on the numeric version, but it’s practical to include also the git commit hash of the software you are actually shipping. ...