Shell+Curl网站健康状态检查脚本，抓出中国博客联盟失联站点

#!/bin/bash
#Author:ZhangGe
#Date：2014-08-21
#Desc：Check the site of ZGboke Alliance.
#取出网站数据
data=`/usr/bin/mysql  -uroot -p123456 -e "use zgboke;select web_url from dir_websites where web_status='3';" -N -B | awk '{print $1}'`
if [ -z "$data" ];then
        echo "Faild to connect database!"
        exit 1
fi
test -f result.log && rm -f result.log
function delay {
        sleep 3
}
tmp_fifofile=/tmp/$$.fifo
mkfifo  $tmp_fifofile
exec 6<>$tmp_fifofile
rm  $tmp_fifofile
#定义并发线程数，需根据vps配置进行调整。
thread=100
for  ((i=0 ;i<$thread;i++ ))
do
        echo
done>&6
#开始多线程循环检测
for url in $data
do
        read -u6
        {
        #curl抓取网站http状态码
        code=`curl -o /dev/null --retry 3 --retry-max-time 8 -s -w %{http_code} $url`
        echo "$code ---> $url">>result.log
        #判断子线程是否执行成功，并输出结果
        delay &&  {
                echo  "$code ---> $url"
        }  ||  {
                echo  "Check thread error!"
        }
        echo  >& 6
}&
done
#等待所有线程执行完毕
wait
exec 6>&-
#找出非200返回码的站点
echo List of exception website:
cat result.log | grep -v 200
exit 0