从Go中的stdin扫描空间

I'm trying to scan some commands from stdin using the standard "fmt" package

However it seems that scanf stops after the first space. Any idea how I can fix it?

   var in string
   for err != nil {
        _, err = fmt.Scanf("%s", &in)
    }
   fmt.Println(in)

I found that what I needed was in the bufio.Scan package

scanner := bufio.NewScanner(os.Stdin)
    for scanner.Scan() {
        return scanner.Text()
    }
    if err := scanner.Err(); err != nil {
        fmt.Fprintln(os.Stderr, "reading standard input:", err)
    }