diff --git a/os/gcmd/gcmd_parser.go b/os/gcmd/gcmd_parser.go
index 33c249749..0ceba41c2 100644
--- a/os/gcmd/gcmd_parser.go
+++ b/os/gcmd/gcmd_parser.go
@@ -49,7 +49,7 @@ func Parse(supportedOptions map[string]bool, strict ...bool) (*Parser, error) {
 //
 // The optional parameter <strict> specifies whether stops parsing and returns error if invalid option passed.
 func ParseWithArgs(args []string, supportedOptions map[string]bool, strict ...bool) (*Parser, error) {
-	strictParsing := true
+	strictParsing := false
 	if len(strict) > 0 {
 		strictParsing = strict[0]
 	}
@@ -95,7 +95,7 @@ func ParseWithArgs(args []string, supportedOptions map[string]bool, strict ...bo
 						}
 						i++
 						continue
-					} else {
+					} else if parser.strict {
 						return nil, errors.New(fmt.Sprintf(`invalid option '%s'`, args[i]))
 					}
 				}
diff --git a/os/gfile/gfile_scan.go b/os/gfile/gfile_scan.go
index adf247f96..3ab9879c2 100644
--- a/os/gfile/gfile_scan.go
+++ b/os/gfile/gfile_scan.go
@@ -15,6 +15,9 @@ import (
 
 // ScanDir returns all sub-files with absolute paths of given <path>,
 // It scans directory recursively if given parameter <recursive> is true.
+//
+// The pattern parameter <pattern> supports multiple file name patterns,
+// using the ',' symbol to separate multiple patterns.
 func ScanDir(path string, pattern string, recursive ...bool) ([]string, error) {
 	isRecursive := false
 	if len(recursive) > 0 {
@@ -33,6 +36,9 @@ func ScanDir(path string, pattern string, recursive ...bool) ([]string, error) {
 // ScanDirFile returns all sub-files with absolute paths of given <path>,
 // It scans directory recursively if given parameter <recursive> is true.
 //
+// The pattern parameter <pattern> supports multiple file name patterns,
+// using the ',' symbol to separate multiple patterns.
+//
 // Note that it returns only files, exclusive of directories.
 func ScanDirFile(path string, pattern string, recursive ...bool) ([]string, error) {
 	isRecursive := false