fix

cmd/zfs-server/main.go

@@ -31,16 +31,20 @@ func main() {
 
 	localBackend := server.NewLocalBackend(cfg.BaseDataset)
 
-	// Create metadata directory if needed
-	dir := cfg.MetadataFile
-	if idx := len(dir) - 1; idx > 0 {
+	// Create metadata directory if needed (only if path contains a directory)
+	if idx := len(cfg.MetadataFile) - 1; idx > 0 {
+		dir := cfg.MetadataFile
+		foundSlash := false
 		for i := len(dir) - 1; i >= 0; i-- {
 			if dir[i] == '/' {
 				dir = dir[:i]
+				foundSlash = true
 				break
 			}
 		}
-		os.MkdirAll(dir, 0755)
+		if foundSlash && dir != "" {
+			os.MkdirAll(dir, 0755)
+		}
 	}
 
 	srv := server.New(cfg.ConfigFile, cfg.MetadataFile, s3Backend, localBackend)