need a netlink function to trigger on changes

Signed-off-by: Jeff Carr <jcarr@wit.com>

gui.go

@@ -49,7 +49,10 @@ func addDNSTab(window *gui.Node, title string) {
 	dd.OnChanged = func(*gui.Node) {
 		s := dd.GetText()
 		tb.SetText("hello world " + args.User + "\n" + s)
+		log.Println("text =", s)
 	}
+	g.NewLabel("UID =")
+
 
 	g2 = newNode.NewGroup("group 2")
 	tb = g2.NewTextbox("tb")

netlink.go

@@ -0,0 +1,48 @@
+package main
+
+/*
+import 	(
+//	"os"
+//	"os/exec"
+	// "log"
+	// "net"
+	// "unix"
+	"github.com/vishvananda/netlink"
+	"github.com/jsimonetti/rtnetlink"
+//	"git.wit.org/wit/gui"
+//	"github.com/davecgh/go-spew/spew"
+)
+
+// In golang, write a function     to register with netlink to detect changes to any network interface     Use tab indentation. Do not include example usage.
+
+func registerNetlink() error {
+	// Create netlink socket
+	sock, err := netlink.Socket(rtnetlink.NETLINK_ROUTE, 0)
+	if err != nil {
+		return err
+	}
+	// Register for interface change events
+	err = netlink.AddMembership(sock, netlink.RTNLGRP_LINK)
+	if err != nil {
+		return err
+	}
+	// Close the socket 
+	defer sock.Close()
+	// Handle incoming notifications
+	for {
+		msgs, _, err := sock.Receive()
+		if err != nil {
+			return err
+		}
+		for _, msg := range msgs {
+			switch msg.Header.Type {
+			case unix.RTM_NEWLINK:
+				// Do something with new link
+			case unix.RTM_DELLINK:
+				// Do something with deleted link
+			}
+		}
+	}
+	return nil
+}
+*/

unix.go

@@ -19,7 +19,7 @@ func CheckSuperuser() bool {
 
 func Escalate() {
 	if os.Getuid() != 0 {
-		cmd := exec.Command("sudo", "./control-panel-dns")
+		cmd := exec.Command("sudo", "./control-panel-dns") // TODO: get the actual path
 		cmd.Stdin = os.Stdin
 		cmd.Stdout = os.Stdout
 		cmd.Stderr = os.Stderr