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

In this chapter, you'll need the GCC compiler and Make tool. We installed these tools in Chapter 1, Getting the Necessary Tools and Writing Our First Linux Programs.

You will also need a new program called pstree for this chapter. You can install it with your package manager. If you are using Debian or Ubuntu, you can install it with sudo apt install psmisc. If, on the other hand, you are using Fedora or CentOS, you can install it with sudo dnf install psmisc.

You will also need the generic Makefile we wrote in Chapter 3, Diving Deep into C in Linux. The Makefile is also available on GitHub, together with all the code samples for this chapter, at https://github.com/PacktPublishing/Linux-System-Programming-Techniques/tree/master/ch6.

Check out the following link to see the Code in Action video: https://bit.ly/3cxY0eQ