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  • Book Overview & Buying Mastering Embedded Linux Programming
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Mastering Embedded Linux Programming

Mastering Embedded Linux Programming

By : Frank Vasquez, Chris Simmonds
4.6 (24)
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Mastering Embedded Linux Programming

Mastering Embedded Linux Programming

4.6 (24)
By: Frank Vasquez, Chris Simmonds

Overview of this book

If you’re looking for a book that will demystify embedded Linux, then you’ve come to the right place. Mastering Embedded Linux Programming is a fully comprehensive guide that can serve both as means to learn new things or as a handy reference. The first few chapters of this book will break down the fundamental elements that underpin all embedded Linux projects: the toolchain, the bootloader, the kernel, and the root filesystem. After that, you will learn how to create each of these elements from scratch and automate the process using Buildroot and the Yocto Project. As you progress, the book will show you how to implement an effective storage strategy for flash memory chips and install updates to a device remotely once it’s deployed. You’ll also learn about the key aspects of writing code for embedded Linux, such as how to access hardware from apps, the implications of writing multi-threaded code, and techniques to manage memory in an efficient way. The final chapters demonstrate how to debug your code, whether it resides in apps or in the Linux kernel itself. You’ll also cover the different tracers and profilers that are available for Linux so that you can quickly pinpoint any performance bottlenecks in your system. By the end of this Linux book, you’ll be able to create efficient and secure embedded devices using Linux.
Table of Contents (27 chapters)
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1
Section 1: Elements of Embedded Linux
10
Section 2: System Architecture and Design Decisions
18
Section 3: Writing Embedded Applications
22
Section 4: Debugging and Optimizing Performance

Summary

This chapter was a deep dive into a lesser-known init system that I feel is largely underappreciated. Like systemd, BusyBox runit can enforce complex dependencies between services both during boot and at runtime. It just does it in a much simpler and I would argue more Unix-like way than systemd does. Plus, nothing beats BusyBox runit when it comes to boot times. If you are already using Buildroot as your build system, then I strongly encourage you to consider BusyBox runit for your device's init system.

We covered a lot of ground in our exploration. First, you learned how to get BusyBox runit onto your device and start it using Buildroot. Then I showed you how you can assemble and configure services together in different ways using out-of-tree umbrella packages. Next, we experimented with a live process supervision tree before delving into service dependencies and ways to express them. After that, I showed you how to add a dedicated logger and configure log rotation...

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