title: SignalHandling


Sometimes an application needs to save internal state or perform some cleanup activity before it exits, or needs to be able to reload a configuration file or write a memory/cpu profile on demand. In UNIX-like operating systems, signals can accomplish these tasks.


The following code demonstrates a program that waits for an interrupt signal and removes a temporary file when it occurs.

package main

import (

func main() {
	f, err := ioutil.TempFile("", "test")
	if err != nil {
	defer os.Remove(f.Name())
	defer f.Close()
	sig := make(chan os.Signal, 1)
	signal.Notify(sig, os.Interrupt)