makeconnection := true
if makeconnection {
	db, err := sql.Open("mysql", "user:pwd@tcp(127.0.0.1:3306)/db?charset=utf8")
	if err == nil {
	        fmt.Println("connect ok")
	} else {
	        fmt.Println("connect err")
	}
	rows, _ := db.Query("select UTC_TIMESTAMP() as c")

	for rows.Next() {
	        var (
	                name string
	        )
	        if err := rows.Scan(&name); err != nil {
	                fmt.Println(err)
	        }
	        fmt.Println("result %s\n", name)
	}

	db.Close()
	db.SetMaxIdleConns(0)
	db.SetMaxOpenConns(0)
	db = nil
}

syscall.Setsid()
    os.Chdir("/")
    syscall.Umask(0002)
    
    gid := 992
    err = syscall.Setresgid(gid, gid, gid)
    log.Info("Setresgid " + strconv.Itoa(gid) + ", real : " + strconv.Itoa(syscall.Getgid()))

uid := 994
err = syscall.Setresuid(uid, uid, uid)
    log.Info("Setresuid " + strconv.Itoa(uid) + ", real : " + strconv.Itoa(syscall.Geteuid()))

//run "ps aux" and cat /proc/<pid>/status here and check user real effective user id

time.Sleep(100 * time.Minute)