feat: updates, not works

encfs/file.go

@@ -21,7 +21,7 @@ import (
 const EncFileExt = ".__encfile"
 
 var (
-	ErrFileForbiddenFileExt = errors.New("File ext is forbidden")
+	ErrFileForbiddenFileExt = errors.New("file ext is forbidden")
 )
 
 type EncFileMeta struct {
@@ -177,7 +177,17 @@ func (f *EncFile) Seek(offset int64, whence int) (int64, error) {
 	if checkIsFileErr != nil {
 		return 0, checkIsFileErr
 	}
-	return f.file.Seek(offset, whence)
+
+	// I do not understand whence
+	if whence != 0 {
+		return 0, fmt.Errorf("not supported whence: %d", whence)
+	}
+
+	ret, err := f.file.Seek(offset, whence)
+	if err != nil {
+		f.filePos = offset
+	}
+	return ret, err
 }
 
 func (f *EncFile) Write(p []byte) (n int, err error) {