Learning how to ignore a signal

There might be cases where we just need to ignore a specific signal. However, rest assured, there are few signals that cannot be ignored, for example, SIGKILL (uncatchable). This recipe will teach you how to ignore a catchable signal.

How to do it...

To ignore a catchable signal, follow these steps:

1. On a shell, open a new source file called signal_ignore.cpp and start by adding the following code:

#include<stdio.h>
#include<signal.h>
#include <iostream>

int main()
{
    std::cout << "Starting ..." << std::endl;
    signal(SIGTERM, SIG_IGN);
    while (true) ;
    std::cout << "Ending ..." << std::endl;
    return 0;
}

2. In this...