get self md5 in Golang

md5.go

// GetSelfMD5 get md5 of current program
func GetSelfMD5() string {
	path, e := exec.LookPath(os.Args[0])
	if e != nil {
		log.Println(`Self md5sum error: look path fail:`, e)
		return ""
	}
	bs, e := ioutil.ReadFile(path)
	if e != nil {
		log.Println(`SelfMd5sum error: read file fail:`, e)
		return ""
	}
	sum := md5.Sum(bs)
	return hex.EncodeToString(sum[:])
}