Fix a few gometalinter warnings

main.go

@@ -9,6 +9,7 @@ import (
 	"log"
 	"log/syslog"
 	"os"
+	"strings"
 	"time"
 
 	"github.com/elastic/go-libaudit"
@@ -19,7 +20,6 @@ import (
 var (
 	reasmBufferSize = flag.Int("reassembler-buffer", 8192, "reassembler buffer size")
 	reasmHorizon    = flag.Duration("reassembler-timeout", 10*time.Second, "reassembled EOE event timeout")
-	idLookup        = flag.Bool("id", true, "lookup uid and gid values in messages (requires -i)")
 )
 
 func main() {
@@ -36,26 +36,23 @@ func processLogs() error {
 	if err != nil {
 		return err
 	}
-	defer output.Close()
+	defer output.Close() // nolint
 
 	reassembler, err := libaudit.NewReassembler(*reasmBufferSize, *reasmHorizon, &streamHandler{output})
 	if err != nil {
 		return fmt.Errorf("failed to create reassembler: %v", err)
 	}
-	defer reassembler.Close()
+	defer reassembler.Close() // nolint
 
 	// Start goroutine to periodically purge timed-out events.
 	go func() {
 		t := time.NewTicker(500 * time.Millisecond)
 		defer t.Stop()
-		for {
-			select {
-			case <-t.C:
+		for range t.C {
 			if reassembler.Maintain() != nil {
 				return
 			}
 		}
-		}
 	}()
 
 	// Process lines from standard input.
@@ -63,6 +60,14 @@ func processLogs() error {
 	for s.Scan() {
 		line := s.Text()
 
+		// Remove anything before the log type.
+		p := strings.Index(line, "type=")
+		if p < 0 {
+			continue
+		} else if p > 0 {
+			line = line[p:]
+		}
+
 		auditMsg, err := auparse.ParseLogLine(line)
 		if err != nil {
 			log.Printf("failed to parse message header: %v", err)
@@ -97,9 +102,6 @@ func (s *streamHandler) EventsLost(count int) {
 	log.Printf("detected the loss of %v sequences", count)
 }
 
-func outputMultipleMessages(msgs []*auparse.AuditMessage) {
-}
-
 func printJSON(w io.Writer, v interface{}) error {
 	lbuf := []byte("@cee:")
 	jsonBytes, err := json.Marshal(v)