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.

Signals

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...