Catching and handling signals

Signals are a useful way for the user or the OS to kill your running application. Sometimes, it makes sense to handle these signals in a more graceful way than the default behavior. Go provides a mechanism to catch and handle signals. In this recipe, we'll explore the handling of signals through the use of a signal handling the Go routine.

Getting ready

Refer to the Getting ready section's steps in the Using command-line flags recipe.

How to do it...

These steps cover writing and running your application:

1. From your terminal/console application, create a new directory called chapter2/signals, and navigate to that directory.
2. Copy tests from https://github.com/agtorre/go-cookbook/tree/master/chapter2/signals, or use this as an exercise to write some of your own code!
3. Create a file called signals.go with the following contents:

        package main

        import (
            "fmt"
            "os"
            "os/signal"
            "syscall"
        )

        // CatchSig...