Book Image

Embedded Linux Development Using Yocto Project Cookbook - Second Edition

By : Alex Gonzalez
Book Image

Embedded Linux Development Using Yocto Project Cookbook - Second Edition

By: Alex Gonzalez

Overview of this book

The Yocto Project has become the de facto distribution build framework for reliable and robust embedded systems with a reduced time to market.You'll get started by working on a build system where you set up Yocto, create a build directory, and learn how to debug it. Then, you'll explore everything about the BSP layer, from creating a custom layer to debugging device tree issues. In addition to this, you’ll learn how to add a new software layer, packages, data, scripts, and configuration files to your system. You will then cover topics based on application development, such as using the Software Development Kit and how to use the Yocto project in various development environments. Toward the end, you will learn how to debug, trace, and profile a running system. This second edition has been updated to include new content based on the latest Yocto release.
Table of Contents (13 chapters)
Title Page
Packt Upsell

Using the sysvinit initialization manager

The initialization manager is an important part of the root filesystem. It is the first thing the kernel executes, and it has the responsibility to start the rest of the system, and manages system shutdown too.

The initialization manager is usually fixed by the Linux distribution. The Poky distribution allows you to select between initialization managers, the most used being System V init (sysvinit) and systemd. The poky-tiny distribution has no initialization manager and uses BusyBox init to directly read the inittab file and launch programs.

The UNIX System V operating system introduced an initialization system that was the basis for Linux's initialization. Several recent attempts have been made to replace it, and systemd has finally managed to get enough traction in between Linux distributions to be considered the successor to sysvinit.

This recipe will introduce the sysvinit initialization manager.

Getting ready

sysvinit is the default initialization...