Shell script to obtain pictures

#!/usr/bin/bash
. /etc/init.d/functions
function check(){
	time=`date "+%F %X"`
	echo "当前时间：$time"
	ip=$(ip a |grep inet |grep "scope global dynamic"|awk -F"/" '{print $1}' |awk '{print $2}')
	ping -w1 -c1 www.baidu.com &>/dev/null
	if [[ $? -ne 0 ]];then
		echo_failure || echo "网络异常，请检查"
	else
		echo_success && echo "网络正常 当前IP:$ip"
	fi
	yum repolist &>/dev/null
	if [[ $? -ne 0 ]];then
		echo_failure || echo "yum异常，请检查"
	fi
}

function down(){
	yum install -y wget &>/dev/null
	w=`echo "$1" |tr -d '\n' |od -An -tx1|tr ' ' %`
	data=$(curl -s "https://image.baidu.com/search/index?tn=baiduimage&word=$w")
	echo $data | grep -P -o "https://ss.*?.jpg" | sort -n -r |uniq >> $2/url2.txt
	a=0
	while read line
	do
	sleep 1
	code=$(curl -I "$line" 2>/dev/null)
	if [ ${code:9:3} -eq 200 ];then
		wget -O $2/$1${a}.jpg $line &>/dev/null
		echo "下载完成 $line"
	else
		echo "无效资源 $line"
	fi
	let a++
	done <$2/url2.txt
	echo "全部下载完成，下载资源$a个"
	return 200
}

function clea(){
	echo "正在打包，请稍后"
	sleep 2
	tar cvzf image.tar.gz $1
	rm -rf $1/url2.txt
}

function main(){
	check
	down $1 $2
	if [[ $? -eq 200 ]];then
		clea $2
		return 100
	else
		echo "下载异常，正在清理环境"
		rm -rf $2
		return 101
	fi
}
clear
echo -e "本程序功能为获取图片: 图片\n礼貌爬取，快乐你我他\n程序设计目的：shel脚本#!/usr/bin/bash
. /etc/init.d/functions
function check(){
	time=`date "+%F %X"`
	echo "当前时间：$time"
	ip=$(ip a |grep inet |grep "scope global dynamic"|awk -F"/" '{print $1}' |awk '{print $2}')
	ping -w1 -c1 www.baidu.com &>/dev/null
	if [[ $? -ne 0 ]];then
		echo_failure || echo "网络异常，请检查"
	else
		echo_success && echo "网络正常 当前IP:$ip"
	fi
	yum repolist &>/dev/null
	if [[ $? -ne 0 ]];then
		echo_failure || echo "yum异常，请检查"
	fi
}

function down(){
	yum install -y wget &>/dev/null
	w=`echo "$1" |tr -d '\n' |od -An -tx1|tr ' ' %`
	data=$(curl -s "https://image.baidu.com/search/index?tn=baiduimage&word=$w")
	echo $data | grep -P -o "https://ss.*?.jpg" | sort -n -r |uniq >> $2/url2.txt
	a=0
	while read line
	do
	sleep 1
	code=$(curl -I "$line" 2>/dev/null)
	if [ ${code:9:3} -eq 200 ];then
		wget -O $2/$1${a}.jpg $line &>/dev/null
		echo "下载完成 $line"
	else
		echo "无效资源 $line"
	fi
	let a++
	done <$2/url2.txt
	echo "全部下载完成，下载资源$a个"
	return 200
}

function clea(){
	echo "正在打包，请稍后"
	sleep 2
	tar cvzf image.tar.gz $1
	rm -rf $1/url2.txt
}

function main(){
	check
	down $1 $2
	if [[ $? -eq 200 ]];then
		clea $2
		return 100
	else
		echo "下载异常，正在清理环境"
		rm -rf $2
		return 101
	fi
}
clear
echo -e "本程序功能为获取图片: 快乐你我他\n程序设计脚本测
sleep 1
read -p "请输入要爬取的图片关键字，默认为中国):  " words
read -p "请输入资源存放路径，默认为  /tmp/image   :  " path
if [ -z $words ];then
	words="中国"
fi
if [ -z $path ];then
	path='/tmp/image'
	mkdir /tmp/image
fi
main $words $path
if [ $? -eq 100 ];then
	echo "程序退出"
else
	echo "程序异常退出"
fi