Added event listener code.

Author: cpliakas

cliutil/worker.go

@@ -0,0 +1,30 @@
+package cliutil
+
+import (
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+)
+
+// EventListener listens for SIGINT and SIGTERM signals and notifies the
+// shutdown channel if it detects that either one was sent.
+func EventListener() <-chan bool {
+	shutdown := make(chan bool)
+
+	go func() {
+		ch := make(chan os.Signal)
+		signal.Notify(ch, syscall.SIGINT, syscall.SIGTERM)
+
+		for {
+			select {
+			case <-ch:
+				log.Println("[NOTICE] shutdown signal received")
+				shutdown <- true
+				break
+			}
+		}
+	}()
+
+	return shutdown
+}