megacheck and staticcheck fixes

cmd/torrentfs/main.go

@@ -48,7 +48,7 @@ var (
 )
 
 func exitSignalHandlers(fs *torrentfs.TorrentFS) {
-	c := make(chan os.Signal)
+	c := make(chan os.Signal, 1)
 	signal.Notify(c, syscall.SIGINT, syscall.SIGTERM)
 	for {
 		<-c

tracker/udp_test.go

@@ -48,10 +48,8 @@ func TestMarshalAnnounceResponse(t *testing.T) {
 func TestLongWriteUDP(t *testing.T) {
 	t.Parallel()
 	l, err := net.ListenUDP("udp4", nil)
+	require.NoError(t, err)
 	defer l.Close()
-	if err != nil {
-		t.Fatal(err)
-	}
 	c, err := net.DialUDP("udp", nil, l.LocalAddr().(*net.UDPAddr))
 	if err != nil {
 		t.Fatal(err)

util/dirwatch/dirwatch_test.go

@@ -4,6 +4,8 @@ import (
 	"io/ioutil"
 	"os"
 	"testing"
+
+	"github.com/stretchr/testify/require"
 )
 
 func TestDirwatch(t *testing.T) {
@@ -14,8 +16,6 @@ func TestDirwatch(t *testing.T) {
 	defer os.RemoveAll(tempDirName)
 	t.Logf("tempdir: %q", tempDirName)
 	dw, err := New(tempDirName)
+	require.NoError(t, err)
 	defer dw.Close()
-	if err != nil {
-		t.Fatal(err)
-	}
 }