Linux shell select implements menu selection

Linux shell select implements menu selection

How to use the select statement (produce menu selection)

grammar:

select variable name in seq variable

do

action

done

Example:

#!/bin/sh

select ch in "begin" "end" "exit"
do
    case $ch in
    "begin")
        echo "start something"
        ;;
    "end")
        echo "stop something"
        ;;
    "exit")
        echo "exit"
        break;
        ;;
    *)
        echo "ignorant"
        ;;
    esac
done;

running result:

yuxuecheng@linux:~/shellSource> ./select_test.sh
1) begin
2) end
3) exit
#? 1
start something
#? 2
stop something
#? 4
ignorant
#? begin
ignorant
#? 3
exit

 

Description: select is a circular selection, generally used with case statements.