shell select用法示例

1.示例代码如下

#!/bin/bash

declare -a serial
serial=(1 2 3 4)
PS3="Enter a number: "

select var in "a" "b" "c" "d"
do
    if ! echo ${serial[@]} | grep -q $REPLY; then
        echo "please enter [1-4]."
        continue
    fi
    echo "your anwser is: $var"
    break
done

2.运行结果如下所示：

[root@localhost ~]# bash test.sh 
1) a
2) b
3) c
4) d
Enter a number: 5
please enter [1-4].
Enter a number: 3
your anwser is: c
[root@localhost ~]#