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)

Writing a simple Makefile

In this recipe, we will learn how to write a Makefile for a specific project. The Makefile we wrote in the previous recipe was generic, but this will be for a single project only. Knowing how to write Makefiles for your projects will save you a lot of time and energy as you start making more complex programs.

Also, including a Makefile in a project is considered good manners. The person downloading your project usually has no idea how to build it. That person only wants to use your program, not be forced to understand how things fit together and how to compile it. After downloading, for example, an open source project, they would expect to be able just to type make and make install (or possibly also some form of configuration script, but we won't cover that here). The program should then be ready to run.

Getting ready

For this recipe, we will use the cube program we made in the Looking at the four stages of compilation recipe in this chapter...