语法错误：尝试运行shell脚本时出现“ done”意外

Question

代码

#!/bin/sh
while true
do
  mpc current > current_song.txt
  mpc idle player
done

导致

Syntax error: "done" unexpected

为什么它会显示为意外完成？

Answer 1

您缺少条件中的括号。

#!/bin/sh
while [ true ]
do
  mpc current > current_song.txt
  mpc idle player
done