some lint fixes

pkg/log/log.go

@@ -14,12 +14,12 @@ var (
 	debug = false
 )
 
-func InitLogger(cfg core.Config) {
+func InitLogger(cfg *core.Config) {
 	debug = cfg.Debug
 	if cfg.LogFile == "-" {
 		return
 	}
-	f, err := os.OpenFile(filepath.Join(cfg.DataDir, cfg.LogFile), os.O_RDWR|os.O_CREATE|os.O_APPEND, 0640)
+	f, err := os.OpenFile(filepath.Join(cfg.DataDir, cfg.LogFile), os.O_RDWR|os.O_CREATE|os.O_APPEND, 0o640)
 	if err != nil {
 		stdlog.Fatal(err)
 	}

pkg/log/scanlog.go

@@ -13,7 +13,7 @@ const defaultSize = 500
 
 type ScanLog struct {
 	// protects logs
-	sync.RWMutex
+	mu sync.RWMutex
 
 	size int
 	logs []string
@@ -30,20 +30,20 @@ func (l *ScanLog) Printf(f string, v ...interface{}) {
 	s := fmt.Sprintf(f, v...)
 	Println(s)
 	s = core.LogTime() + s
-	l.Lock()
+	l.mu.Lock()
 	llen := len(l.logs)
 	if llen < l.size {
 		l.logs = append(l.logs, s)
 	} else if llen == l.size {
 		l.logs = append(l.logs[1:], s)
 	}
-	l.Unlock()
+	l.mu.Unlock()
 }
 
 func (l *ScanLog) Logs() (logs string) {
-	l.RLock()
+	l.mu.RLock()
 	logs = reverseJoin(l.logs, "\n")
-	l.RUnlock()
+	l.mu.RUnlock()
 	return
 }