Add support for ip --router.

cmd/ip/root.go

@@ -20,7 +20,8 @@ var services = []string{
 
 // Options - Parsed input flags schema
 var opts struct {
-	Local bool `short:"l" long:"local" description:"Return local IP of the specified interface (defaults to en0)"`
+	Local  bool `short:"l" long:"local" description:"Return local IP of the specified interface (defaults to en0)"`
+	Router bool `short:"r" long:"router" description:"Return IP of LAN router"`
 }
 
 func main() {
@@ -40,6 +41,8 @@ func main() {
 		} else {
 			local("en0")
 		}
+	} else if opts.Router {
+		router()
 	} else {
 		external()
 	}

cmd/ip/router.go

@@ -0,0 +1,18 @@
+package main
+
+import (
+	"os"
+	"strings"
+
+	"github.com/drn/dots/pkg/log"
+	"github.com/drn/dots/pkg/run"
+)
+
+func router() {
+	info := run.Capture("netstat -nr | grep -m 1 default")
+	fields := strings.Fields(info)
+	if len(fields) < 2 || !isValid(fields[1]) {
+		os.Exit(1)
+	}
+	log.Info(fields[1])
+}