// the file it describes, it may be necessary to modify Header.Name
// to provide the full path name of the file.
//
// If fi implements [FileInfoNames]
// Header.Gname and Header.Uname
// are provided by the methods of the interface.
func FileInfoHeader(fi fs.FileInfo, link string) (*Header, error) {
	if fi == nil {
		return nil, errors.New("archive/tar: FileInfo is nil")
	}
	fm := fi.Mode()
	h := &Header{