Book Image

Linux System Programming Techniques

By : Jack-Benny Persson
Book Image

Linux System Programming Techniques

By: Jack-Benny Persson

Overview of this book

Linux is the world's most popular open source operating system (OS). Linux System Programming Techniques will enable you to extend the Linux OS with your own system programs and communicate with other programs on the system. The book begins by exploring the Linux filesystem, its basic commands, built-in manual pages, the GNU compiler collection (GCC), and Linux system calls. You'll then discover how to handle errors in your programs and will learn to catch errors and print relevant information about them. The book takes you through multiple recipes on how to read and write files on the system, using both streams and file descriptors. As you advance, you'll delve into forking, creating zombie processes, and daemons, along with recipes on how to handle daemons using systemd. After this, you'll find out how to create shared libraries and start exploring different types of interprocess communication (IPC). In the later chapters, recipes on how to write programs using POSIX threads and how to debug your programs using the GNU debugger (GDB) and Valgrind will also be covered. By the end of this Linux book, you will be able to develop your own system programs for Linux, including daemons, tools, clients, and filters.
Table of Contents (14 chapters)

Technical requirements

All you need for this chapter is a Linux computer with GCC and Make installed, preferably via one of the meta-packages or group installs mentioned in Chapter 1, Getting the Necessary Tools and Writing Our First Linux Programs. It's also preferable if you use the Bash shell for optimal compatibility. Most of the examples will work with other shells as well, but there's no guarantee that everything will work the same way on every possible shell out there. You can check which shell you are using by running echo $SHELL in your terminal. If you are using Bash, it will say /bin/bash.

You can download all the code for this chapter from https://github.com/PacktPublishing/Linux-System-Programming-Techniques/tree/master/ch2.

Check out the following link to see the Code in Action video: https://bit.ly/3u5VItw