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

For this chapter, you'll need the GCC compiler, the Make tool, and the generic Makefile we made in the Writing a generic Makefile with GCC options recipe in Chapter 3, Diving Deep into C in Linux. Chapter 1, Getting the Necessary Tools and Writing Our First Linux Programs, covers installing the compiler and the Make tool.

The generic Makefile, along with all the source code examples for this chapter, can be downloaded from GitHub at this URL: https://github.com/PacktPublishing/Linux-System-Programming-Techniques/tree/master/ch5.

We are going to look up functions and header files in the built-in manual in Linux. If you are using Debian or Ubuntu, the Linux Programmer's Manual is installed as part of the build-essentials meta-package, covered in Chapter 1, Getting the Necessary Tools and Writing Our First Linux Programs. You'll also need to install the POSIX Programmer's Manual, covered in the Getting information about Linux and Unix-specific...