Book Image

Practical C Programming

By : B. M. Harwani
Book Image

Practical C Programming

By: B. M. Harwani

Overview of this book

Used in everything from microcontrollers to operating systems, C is a popular programming language among developers because of its flexibility and versatility. This book helps you get hands-on with various tasks, covering the fundamental as well as complex C programming concepts that are essential for making real-life applications. You’ll start with recipes for arrays, strings, user-defined functions, and pre-processing directives. Once you’re familiar with the basic features, you’ll gradually move on to learning pointers, file handling, concurrency, networking, and inter-process communication (IPC). The book then illustrates how to carry out searching and arrange data using different sorting techniques, before demonstrating the implementation of data structures such as stacks and queues. Later, you’ll learn interesting programming features such as using graphics for drawing and animation, and the application of general-purpose utilities. Finally, the book will take you through advanced concepts such as low-level programming, embedded software, IoT, and security in coding, as well as techniques for improving code performance. By the end of this book, you'll have a clear understanding of C programming, and have the skills you need to develop robust apps.
Table of Contents (20 chapters)

Handling signals

In this recipe, we will learn signal handling. We will learn how to automatically raise a signal, how signals are raised by user actions, and how signals are directed to specific signal-handling functions. Signal handling is required to take necessary action when the signal occurs. The actions may include ignoring the signal, terminating the process, blocking or suspending a process, resuming a process, and many more.

Let's start with a quick overview of signals before we dive into the recipe.


A signal is an indicator that is generated through software and is used to stop the usual execution of the program, and through a branch of CPU to perform some specific tasks. The signal can be...