Conforming to the cross-platform UX

The implementation now terminates when the unix socket is deleted.
Currently we are unable to use fsnotify (on linux),
since it does not notify on the deletion of open files.

The implementation can now daemonize (on linux)
or be kept in the foreground by providing the necessary flag.

src/main.go

@@ -1,23 +1,45 @@
 package main
 
 import (
-	"fmt"
 	"log"
-	"net"
 	"os"
 	"runtime"
 )
 
-/* TODO: Fix logging
- * TODO: Fix daemon
- */
-
 func main() {
 
-	if len(os.Args) != 2 {
+	// parse arguments
+
+	var foreground bool
+	var interfaceName string
+	if len(os.Args) < 2 || len(os.Args) > 3 {
+		return
+	}
+
+	switch os.Args[1] {
+	case "-f", "--foreground":
+		foreground = true
+		if len(os.Args) != 3 {
+			return
+		}
+		interfaceName = os.Args[2]
+	default:
+		foreground = false
+		if len(os.Args) != 2 {
+			return
+		}
+		interfaceName = os.Args[1]
+	}
+
+	// daemonize the process
+
+	if !foreground {
+		err := Daemonize()
+		if err != nil {
+			log.Println("Failed to daemonize:", err)
+		}
 		return
 	}
-	deviceName := os.Args[1]
 
 	// increase number of go workers (for Go <1.5)
 
@@ -25,32 +47,33 @@ func main() {
 
 	// open TUN device
 
-	tun, err := CreateTUN(deviceName)
+	tun, err := CreateTUN(interfaceName)
 	log.Println(tun, err)
 	if err != nil {
 		return
 	}
 
+	// create wireguard device
+
 	device := NewDevice(tun, LogLevelDebug)
-	device.log.Info.Println("Starting device")
+
+	logInfo := device.log.Info
+	logError := device.log.Error
+	logInfo.Println("Starting device")
 
 	// start configuration lister
 
-	go func() {
-		socketPath := fmt.Sprintf("/var/run/wireguard/%s.sock", deviceName)
-		l, err := net.Listen("unix", socketPath)
+	uapi, err := NewUAPIListener(interfaceName)
+	if err != nil {
+		logError.Fatal("UAPI listen error:", err)
+	}
+	defer uapi.Close()
+
+	for {
+		conn, err := uapi.Accept()
 		if err != nil {
-			log.Fatal("listen error:", err)
+			logError.Fatal("accept error:", err)
 		}
-
-		for {
-			conn, err := l.Accept()
-			if err != nil {
-				log.Fatal("accept error:", err)
-			}
-			go ipcHandle(device, conn)
-		}
-	}()
-
-	device.Wait()
+		go ipcHandle(device, conn)
+	}
 }