Go Systems Programming

A simple signal handler in Go

This subsection will present a naive Go program that handles only the SIGTERM and SIGINT signals. The Go code of h1s.go will be presented in three parts; the first part is the following:

package main 
 
import ( 
   "fmt" 
   "os" 
   "os/signal" 
   "syscall" 
   "time" 
) 
 
func handleSignal(signal os.Signal) { 
   fmt.Println("Got", signal) 
} 

Apart from the preamble of the program, there is also a function named handleSignal() that will be called when the program receives any of the two supported signals.

The second part of h1s.go contains the following Go code:

func main() { 
   sigs := make(chan os.Signal, 1) 
   signal.Notify(sigs, os.Interrupt, syscall.SIGTERM) 
   go func() { 
         for { 
               sig := <-sigs 
               fmt.Println(sig) 
               handleSignal(sig) 
         } 
   }() 

The ...