#!/bin/bash

#

#TEST SERVICE

# Version 0.01

declare -a dir="/tmp/test/"

echo "TEST SERVICE: 以空格分割"

echo "例如: start network"

echo "===quit 退出====="

echo "================="

while read -p 'Command # :' a;do

    flag=`echo $a | cut -d ' ' -f1` && name=`echo $a | cut -d' ' -f2` &> /dev/null

    if [ -e $flag -o $name ];then #如果两个字符串都存在

        if [ $flag == 'quit' ];then exit;fi

        if [ -f $dir$name ] ;then #如果$name文件已经存在, 即服务已经启动

            echo "$dir$name已存在";

            case $flag in

                start) echo "$name服务已启动";;

                stop) rm -f $dir$name; echo "$name服务已停止";;

                restart) rm -f $dir$name; touch $dir$name; echo "$name已经重新创建并启动";;

                status) echo "$name is runing...";;

                *) echo "Wrong using! input example : start network";;

            esac

        else #如果$name文件不存在

            echo "$name不存在";

            case $flag in

                start) touch $dir$name;echo "$name服务已创建成功";;

                stop) echo "停止失败,${name}服务已被其他用户或程序停止";;

                restart) touch $dir$name; echo "$name尚未启动,启动中";;

                status) echo "$name is stopped...";;

                *) echo "Wrong using! input example : start network";;

            esac

        fi

    else #如果$flag或者$name有一个不存在, 即输入参数错误

        echo "Wrong using! input example : start network" #输入错误, 提示语法

    fi

done

man file 返回值项如下:

RETURN CODE
file returns 0 on success, and non-zero on error.

If the file named by the file operand does not exist, cannot be read, or the type of the file named by the file operand cannot be determined, this
is not be considered an error that affects the exit status.   //如果文件不存在, 打不开, 文件格式不确定, 这些情况都不会返回error的状态码;