Book Image

Hands-On System Programming with C++

By : Dr. Rian Quinn
Book Image

Hands-On System Programming with C++

By: Dr. Rian Quinn

Overview of this book

C++ is a general-purpose programming language with a bias toward system programming as it provides ready access to hardware-level resources, efficient compilation, and a versatile approach to higher-level abstractions. This book will help you understand the benefits of system programming with C++17. You will gain a firm understanding of various C, C++, and POSIX standards, as well as their respective system types for both C++ and POSIX. After a brief refresher on C++, Resource Acquisition Is Initialization (RAII), and the new C++ Guideline Support Library (GSL), you will learn to program Linux and Unix systems along with process management. As you progress through the chapters, you will become acquainted with C++'s support for IO. You will then study various memory management methods, including a chapter on allocators and how they benefit system programming. You will also explore how to program file input and output and learn about POSIX sockets. This book will help you get to grips with safely setting up a UDP and TCP server/client. Finally, you will be guided through Unix time interfaces, multithreading, and error handling with C++ exceptions. By the end of this book, you will be comfortable with using C++ to program high-quality systems.
Table of Contents (16 chapters)

Studying an example on the TCP echo server

In this example, we will walk the reader through creating an echo server, but using TCP instead of UDP. Just like with the previous example, an echo server echoes any input to its output. Unlike the UDP example, TCP is a connection-based protocol, and thus some of the specifics of how to establish a connection and send/receive data are different in this example.


To start, we must define the maximum buffer size we plan to send from the client to the server and back, and we must also define the port we wish to use:

#define PORT 22000
#define MAX_SIZE 0x10

For the server, we will need the following includes:

#include <array>
#include <iostream>

#include <unistd.h...