Example of listening for interrupt signal and confirming exit in the shell

interrupt-confirm-exit.go

package main

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

func main() {

	c := make(chan os.Signal, 1)
	signal.Notify(c, os.Interrupt)

	for {

		<-c // await Ctrl+C
		fmt.Println("\nExiting...")

	ConfirmExit:
		for {

			fmt.Print("Save changes [y/n/Cancel]? ")
			var a string
			fmt.Scanln(&a)

			switch {

			case len(a) == 0, a[0] == 'c', a[0] == 'C':
				fmt.Println("Cancelled.")
				break ConfirmExit

			case a[0] == 'y', a[0] == 'Y':
				// TODO save stuff
				fmt.Println("Saved.")
				os.Exit(0)

			case a[0] == 'n', a[0] == 'N':
				fmt.Println("Not saved.")
				os.Exit(0)

			default:
				fmt.Println("Huh?")

			}
		}
	}

}