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)

Chapter 10: Using Different Kinds of IPC

In this chapter, we will learn about the various ways we can communicate between processes via so-called inter-process communication (IPC). We will write various programs that use different kinds of IPC, from signals and pipes to FIFOs, message queues, shared memory, and sockets.

Processes sometimes need to exchange information—for example, in the case of a client and a server program running on the same computer. It could also be a process that has forked into two processes, and they need to communicate somehow.

There are multiple ways in which this IPC can happen. In this chapter, we'll learn about some of the most common ones.

Knowing about IPC is essential if you want to write more than the most basic of programs. Sooner or later, you'll have a program consisting of multiple pieces or multiple programs that needs to share information.

In this chapter, we will cover the following recipes:

  • Using signals...