Mainloop for Go apps that catch OS signals

signals.go

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

var (
	SystemSignals = make(chan os.Signal)
)

func StartSignalListener() {
	signal.Notify(SystemSignals, syscall.SIGINT, syscall.SIGKILL, syscall.SIGHUP)
	for {
		sig := <-SystemSignals
		if sig == syscall.SIGINT {
			log.Println("caught SIGINT; exiting")
			os.Exit(0)
		} else if sig == syscall.SIGKILL {
			log.Println("received SIGKILL; exiting")
			os.Exit(0)
		} else if sig == syscall.SIGHUP {
			log.Println("received SIGHUP; reloading...")
		}
	}
}