[code]
func Filemtime(filename string) (int64, error) {
	fd, err := os.Open(filename)
	if err != nil {
		return 0, err
	}
	defer fd.Close()
	fileinfo, err := fd.Stat()
	if err != nil {
		return 0, err
	}
	return fileinfo.ModTime().Unix(), nil
}
[/code]