functional

main.go

@@ -76,7 +76,7 @@ Options:
   -f, --fahrenheit      Show temperatures in fahrenheit.
   -s, --statusbar       Show a statusbar with the time.
   -b, --battery         Show battery level widget ('minimal' turns off).
-  -i, --interface       Select network interface [default: all].
+  -i, --interface=NAME  Select network interface [default: all].
 
 Colorschemes:
   default
@@ -118,7 +118,7 @@ Colorschemes:
 	if fahrenheit {
 		tempScale = w.Fahrenheit
 	}
-	netInterface, _ := args["--interface"].(string)
+	netInterface, _ = args["--interface"].(string)
 
 	return nil
 }

src/widgets/net.go

@@ -38,7 +38,7 @@ func NewNetWidget(netInterface string) *NetWidget {
 	}
 	self.Title = " Network Usage "
 	if netInterface != "all" {
-	        self.Title = fmt.Sprintf(" %s Usage ", netInterface)
+		self.Title = fmt.Sprintf(" %s Usage ", netInterface)
 	}
 
 	self.update()
@@ -64,11 +64,8 @@ func (self *NetWidget) update() {
 	var totalBytesRecv uint64
 	var totalBytesSent uint64
 	for _, _interface := range interfaces {
-		// ignore VPN interface
-		if _interface.Name != "tun0" && self.NetInterface == "all" {
-			totalBytesRecv += _interface.BytesRecv
-			totalBytesSent += _interface.BytesSent
-		} else if _interface.Name == self.NetInterface {
+		// ignore VPN interface or filter interface by name
+		if (_interface.Name != "tun0" && self.NetInterface == "all") || (_interface.Name == self.NetInterface) {
 			totalBytesRecv += _interface.BytesRecv
 			totalBytesSent += _interface.BytesSent
 		}