cmd/revid-cli: handle failure to start netsender

cmd/revid-cli/main.go

@@ -31,6 +31,7 @@ import (
 	"errors"
 	"flag"
 	"fmt"
+	"os"
 	"os/exec"
 	"strconv"
 	"strings"
@@ -130,7 +131,7 @@ func main() {
 	}
 
 	// Do we want a netsender session
-	netSenderFlagPtr := flag.Bool("NetSender", false, "Are we checking vars through netsender?")
+	useNetsender := flag.Bool("NetSender", false, "Are we checking vars through netsender?")
 	// User might also want to define how long revid runs for
 	runDurationPtr := flag.Duration("runDuration", defaultRunDuration, "How long do you want revid to run for?")
 
@@ -249,12 +250,17 @@ func main() {
 
 	var ns netsender.Netsender
 	var vs int
-	if *netSenderFlagPtr {
+	if *useNetsender {
 		// initialize NetSender and use NetSender's logger
 		config.Logger = netsender.GetLogger()
 
-		// FIXME(kortschak): Handle this error appropriately.
-		ns, _ = netsender.NewNetsender(false, revidReportActions)
+		var err error
+		ns, err = netsender.NewNetsender(false, revidReportActions)
+		if err != nil {
+			l := smartlogger.New(loggerVerbosity, smartlogger.File, "/var/log/netsender/")
+			l.Log(progName, "Error", err.Error()) // TODO(kortschak): Make this "Fatal" when that exists.
+			os.Exit(1)
+		}
 
 		vs = ns.GetVarSum()
 	} else {
@@ -267,7 +273,7 @@ func main() {
 	paused := false
 
 	// loop in NetSender mode
-	for *netSenderFlagPtr {
+	for *useNetsender {
 		if err := sendTo(ns); err != nil {
 			config.Logger.Log(progName, "Error", err.Error())
 			time.Sleep(netSendRetryTime)