added dependency github.com/sevlyar/go-daemon

vendor/github.com/sevlyar/go-daemon/daemon_test.go

@@ -0,0 +1,68 @@
+package daemon
+
+import (
+	"flag"
+	"log"
+	"os"
+	"syscall"
+	"time"
+)
+
+func Example() {
+	signal := flag.String("s", "", "send signal to daemon")
+
+	handler := func(sig os.Signal) error {
+		log.Println("signal:", sig)
+		if sig == syscall.SIGTERM {
+			return ErrStop
+		}
+		return nil
+	}
+
+	// Define command: command-line arg, system signal and handler
+	AddCommand(StringFlag(signal, "term"), syscall.SIGTERM, handler)
+	AddCommand(StringFlag(signal, "reload"), syscall.SIGHUP, handler)
+	flag.Parse()
+
+	// Define daemon context
+	dmn := &Context{
+		PidFileName: "/var/run/daemon.pid",
+		PidFilePerm: 0644,
+		LogFileName: "/var/log/daemon.log",
+		LogFilePerm: 0640,
+		WorkDir:     "/",
+		Umask:       027,
+	}
+
+	// Send commands if needed
+	if len(ActiveFlags()) > 0 {
+		d, err := dmn.Search()
+		if err != nil {
+			log.Fatalln("Unable send signal to the daemon:", err)
+		}
+		SendCommands(d)
+		return
+	}
+
+	// Process daemon operations - send signal if present flag or daemonize
+	child, err := dmn.Reborn()
+	if err != nil {
+		log.Fatalln(err)
+	}
+	if child != nil {
+		return
+	}
+	defer dmn.Release()
+
+	// Run main operation
+	go func() {
+		for {
+			time.Sleep(0)
+		}
+	}()
+
+	err = ServeSignals()
+	if err != nil {
+		log.Println("Error:", err)
+	}
+}