DNS拨测shell脚本

Version:20180419

#!/bin/bash
###############DNS拨测脚本      V1      20180419
###############By PlatoWG
##备份原resolv.conf文件
/bin/cp /etc/resolv.conf /etc/resolv.conf.back
##脚本主体
success=0
fail=0
read -p "请输入拨测次数:" num
echo "nameserver 114.114.114.114" > /etc/resolv.conf
for i in `seq 1 $num`
  do
        NO=`curl -I  http://www.caict.ac.cn/|grep -w HTTP|grep -w HTTP|awk '{print $2}'` &> /dev/null
        clear;echo "第${i}次拨测,HTTP返回状态$NO"
        if [ $NO -eq 200 ];then
                let success+=1 ;else
                let fail+=1
        fi
        sleep 0.1
  done
clear;echo "拨测完成，拨测结果如下:"
echo 共拨测${num}次
echo 拨测成功${success}次
echo 拨测失败${fail}次
rm -rf /etc/resolv.conf
mv /etc/resolv.conf.back /etc/resolv.conf

Version：20180421 增加回显拨测起止时间；增加自定义拨测DNSIP，拨测域名，拨测次数；增加回显拨测信息确认

#!/bin/bash
###############DNS拨测脚本      V2      20180421
###############By PlatoWG
##备份原resolv.conf文件
/bin/cp /etc/resolv.conf /etc/resolv.conf.back
##脚本主体
success=0
fail=0
read -p "请输入DNSIP:" dns
read -p "请输入拨测次数:" num
read -p "请输入拨测域名:" domain
echo "nameserver $dns" > /etc/resolv.conf

echo -e "请确认拨测信息:DNSIP:$dns \n拨测次数:$num \n拨测域名:$domain"
read -p "请输入y/n确认信息" confirm
if [ $confirm != "y" ];then
        exit 0
fi

begin_time=`date "+%F %T"`

for i in `seq 1 $num`
  do
        NO=`curl -I  $domain|grep -w HTTP|grep -w HTTP|awk '{print $2}'` &> /dev/null
        clear;echo "第${i}次拨测,HTTP返回状态$NO"
        if [ $NO -eq 200 ];then
                let success+=1 ;else
                let fail+=1
        fi
        sleep 0.1
  done

end_time=`date "+%F %T"`

clear;echo "拨测完成，拨测结果如下:"
echo "拨测时间:$begin_time--$end_time"
echo 共拨测${num}次
echo 拨测成功${success}次
echo 拨测失败${fail}次
rm -rf /etc/resolv.conf
mv /etc/resolv.conf.back /etc/resolv.conf

Version：20180425 增加并发拨测功能，且支持自定义并发次数；增加日志记录，位置./log/（拨测时间）.log

#!/bin/bash  
clear
###############DNS拨测脚本      V3      20180425
###############By PlatoWG  
##备份原resolv.conf文件  
/bin/cp /etc/resolv.conf /etc/resolv.conf.back
##脚本主体
if [ ! -e ./log ];then
        mkdir log
fi
touch ./log/`date +%F-%T`.log
logdir=./log/`date +%F-%T`.log
success=0
fail=0
read -p "请输入DNSIP:" dns
read -p "请输入拨测次数:" num
read -p "请输入拨测域名:" domain
read -p "请输入并发量:" concurrent
echo "nameserver $dns" > /etc/resolv.conf

echo -e "请确认拨测信息:DNSIP:$dns \n拨测次数:$num \n拨测域名:$domain"  
read -p "请输入y/n确认信息" confirm
if [ $confirm != "y" ];then
        exit 0
fi

####
trap "exec 1000>&-;exec 1000<&-;exit 0" 2
mkfifo tempfifo
exec 1000<>tempfifo
rm -rf tempfifo

for i in `seq 1 $concurrent`
do
        echo >&1000
done
####

begin_time=`date "+%F %T"`

for i in `seq 1 $num`
  do
        read -u1000
    {
        curl -si  $domain >> $logdir
        echo -n "#"
        echo >&1000
    } &
  done

wait
exec 1000>&-;exec 1000<&-

end_time=`date "+%F %T"`

####  
success=`sed -n '/HTTP\/1\.1 200 OK/p' $logdir |cut -d" " -f 2|wc -l`
fail=`expr $[num-success]`
####

clear;echo "拨测完成，拨测结果如下:"  
echo "拨测时间:$begin_time--$end_time"  
sed -i -e "1i拨测时间:$begin_time--$end_time\n"  $logdir
echo 共拨测成功${num}次  
echo 拨测成功${success}次  
echo 拨测失败${fail}次  
rm -rf /etc/resolv.conf
mv /etc/resolv.conf.back /etc/resolv.conf

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