Use godirwalk in globpath (#5145)

plugins/inputs/file/file.go

@@ -75,10 +75,7 @@ func (f *File) refreshFilePaths() error {
 		if len(files) <= 0 {
 			return fmt.Errorf("could not find file: %v", file)
 		}
-
-		for k := range files {
-			allFiles = append(allFiles, k)
-		}
+		allFiles = append(allFiles, files...)
 	}
 
 	f.filenames = allFiles

plugins/inputs/filestat/filestat.go

@@ -73,13 +73,17 @@ func (f *FileStat) Gather(acc telegraf.Accumulator) error {
 			continue
 		}
 
-		for fileName, fileInfo := range files {
+		for _, fileName := range files {
 			tags := map[string]string{
 				"file": fileName,
 			}
 			fields := map[string]interface{}{
 				"exists": int64(1),
 			}
+			fileInfo, err := os.Stat(fileName)
+			if os.IsNotExist(err) {
+				fields["exists"] = int64(0)
+			}
 
 			if fileInfo == nil {
 				log.Printf("E! Unable to get info for file [%s], possible permissions issue",

plugins/inputs/logparser/logparser.go

@@ -182,7 +182,7 @@ func (l *LogParserPlugin) tailNewfiles(fromBeginning bool) error {
 		}
 		files := g.Match()
 
-		for file := range files {
+		for _, file := range files {
 			if _, ok := l.tailers[file]; ok {
 				// we're already tailing this file
 				continue

plugins/inputs/tail/tail.go

@@ -111,7 +111,7 @@ func (t *Tail) tailNewFiles(fromBeginning bool) error {
 		if err != nil {
 			t.acc.AddError(fmt.Errorf("E! Error Glob %s failed to compile, %s", filepath, err))
 		}
-		for file := range g.Match() {
+		for _, file := range g.Match() {
 			if _, ok := t.tailers[file]; ok {
 				// we're already tailing this file
 				continue