started

main.go

@@ -47,6 +47,7 @@ var (
 	tempScale      = w.Celcius
 	battery        = false
 	statusbar      = false
+	netInterface   = "all"
 
 	cpu  *w.CpuWidget
 	batt *w.BatteryWidget
@@ -75,6 +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].
 
 Colorschemes:
   default
@@ -116,6 +118,7 @@ Colorschemes:
 	if fahrenheit {
 		tempScale = w.Fahrenheit
 	}
+	netInterface, _ := args["--interface"].(string)
 
 	return nil
 }
@@ -261,7 +264,7 @@ func initWidgets() {
 		if battery {
 			batt = w.NewBatteryWidget(graphHorizontalScale)
 		}
-		net = w.NewNetWidget()
+		net = w.NewNetWidget(netInterface)
 		disk = w.NewDiskWidget()
 		temp = w.NewTempWidget(tempScale)
 	}

src/widgets/net.go

@@ -11,6 +11,8 @@ import (
 	"github.com/cjbassi/gotop/src/utils"
 )
 
+type NetInterface string
+
 type NetWidget struct {
 	*ui.SparklineGroup
 	updateInterval time.Duration
@@ -18,9 +20,10 @@ type NetWidget struct {
 	// used to calculate recent network activity
 	totalBytesRecv uint64
 	totalBytesSent uint64
+	NetInterface   string
 }
 
-func NewNetWidget() *NetWidget {
+func NewNetWidget(netInterface string) *NetWidget {
 	recvSparkline := ui.NewSparkline()
 	recvSparkline.Data = []int{}
 
@@ -31,8 +34,12 @@ func NewNetWidget() *NetWidget {
 	self := &NetWidget{
 		SparklineGroup: spark,
 		updateInterval: time.Second,
+		NetInterface:   netInterface,
 	}
 	self.Title = " Network Usage "
+	if netInterface != "all" {
+	        self.Title = fmt.Sprintf(" %s Usage ", netInterface)
+	}
 
 	self.update()
 
@@ -58,7 +65,10 @@ func (self *NetWidget) update() {
 	var totalBytesSent uint64
 	for _, _interface := range interfaces {
 		// ignore VPN interface
-		if _interface.Name != "tun0" {
+		if _interface.Name != "tun0" && self.NetInterface == "all" {
+			totalBytesRecv += _interface.BytesRecv
+			totalBytesSent += _interface.BytesSent
+		} else if _interface.Name == self.NetInterface {
 			totalBytesRecv += _interface.BytesRecv
 			totalBytesSent += _interface.BytesSent
 		}