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)

Installing GCC and GNU Make

In this section, we will install the essential tools that we'll need throughout this book; namely, GCC, the compiler. It's the compiler that turns the C source code into a binary program that we can run on the system. All the C code that we write will need to be compiled.

We'll also install GNU Make, a tool that we'll be using later on to automate how projects containing more than one source file are compiled.

Getting ready

Since we are installing software on the system, we'll need to be using either the root user or a user with sudo privileges. I will be using sudo in this recipe, but if you are on a system without sudo, you can switch to the root user with su before entering the commands (and then leave out sudo).

How to do it…

We will be installing what is called a meta-package or a group, a package that contains a collection of other packages. This meta-package includes both GCC, GNU Make, several manual...