Question

Bash 脚本 switch case 时出错

2016-12-06

571

bash

我想创建一个简单的巫术案例，在其中我可以根据用户提示执行函数：

echo Would you like us to perform the option: "(Y|N)"

read inPut

case $inPut in
# echoing a command encapsulated by
# backticks (``) executes the command
"Y") echo 'Starting.....'
donwload_source_code


# depending on the scenario, execute the other option
# or leave as default
"N") echo 'Stopping execution'
exit
esac

但是当我执行脚本时出现错误：

Would you like us to perform the option: (Y|N)
n
run.sh: line 27: syntax error near unexpected token `)'
run.sh: line 27: `"N") echo 'Stopping execution''
EMP-SOF-LT099:Genesis Plamen$

您知道如何解决这个问题吗？

Answer 1

多个问题。

在每个 case 构造末尾添加 ;;
exit 命令在 switch-case 构造中放置错误，没有 ;; 。它应该在 case 末尾或上方。
read 有自己的选项来打印用户提示消息，可以避免不必要的 echo 。

无错误脚本

#!/bin/bash

read -p "Would you like us to perform the option: \"(Y|N)\" " inPut

case $inPut in
# echoing a command encapsulated by
# backticks (``) executes the command
"Y") echo 'Starting.....'
donwload_source_code
;;


# depending on the scenario, execute the other option
# or leave as default
"N") echo 'Stopping execution'
exit
;;

esac

Answer 2

添加 ;;

#!/bin/bash
echo Would you like us to perform the option: "(Y|N)"

read inPut

case $inPut in
# echoing a command encapsulated by
# backticks (``) executes the command
"Y") echo 'Starting.....'
donwload_source_code


# depending on the scenario, execute the other option
# or leave as default
;;
"N") echo 'Stopping execution'
exit
;;
esac