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Shell script realizes multi-select DNS simultaneous batch resolution of domain name IP addresses (new update)

2022-08-02 09:57:00 【isk--cosann】

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The script was in the original《shellThe script implements batch resolution of domain namesIP地址（支持多DNS）》On the basis of the code logic optimization and small details code update,Important changes are listed below：

Add any multiple choiceDNS逻辑,That is, the target may not be selected during executionDNS,只需指定DNS_File文件（默认DNS为114.114.114.114,There are custom requirements can be modified by themselves）

实现代码

#!/bin/bash
#Author:cosann
#Function:批量解析域名A记录和CNAME记录脚本
#version:2.0
#Create Time:20220714
#Update Time: 20220801
#Description:
#1.支持DNSIPArgument judgment
#2.支持DNSParse the domain name file to determine
#3.自定义多选DNS(默认DNS:114.114.114.114,Up to three are supportedDNS解析)

clear   #Clear the screen while the script is running
#Prompt for script information
cat <<EOF ============================================= == Welcome to the DNS resolution script ===== --------------------------------------------- #1.Author:Cosann #2.Function:批量解析域名A记录和CNAME记录脚本 #3.version:2.0 #4.Description: - 支持DNSIPArgument judgment - 支持DNSParse the domain name file to determine - 自定义多选DNS(默认DNS:114.114.114.114 Up to three are supportedDNS解析) ============================================= EOF

echo    #换行

#初始化默认DNS服务器
dns=114.114.114.114   


#定义DNSText detection function
function dns_file_cleck () {
    
    if ! [ -f "$dns_file" ]
    then
        echo "$4文件错误,Please check the text file"
        exit 
    fi
}

#定义DNSNetwork detection function
function Ping_Stat_1 (){
    
    ping -w 1 $dns1 &> /dev/null    #ping测试
    if [ "`echo $?`" == 0 ]
    then
        return 100  #返回DNSThe target network reachability value
    else
        return 200  #返回DNSTarget network unreachable value
    fi
}
function Ping_Stat_2 (){
    
    ping -w 1 $dns2 &> /dev/null
    if [ "`echo $?`" == 0 ]
    then
        return 100
    else
        return 200
    fi
}
function Ping_Stat_3 (){
    
    ping -w 1 $dns3 &> /dev/null
    if [ "`echo $?`" == 0 ]
    then
        return 100
    else
        return 200
    fi
}

#Parameter transmission detection and execution control
if [ $# -eq "1" ]
then 
    dns1=$dns;dns_file=$1;
    echo -e "DNS:$dns1\tDNS_File:$PWD/$dns_file\n"
    dns_file_cleck   #调用DNSText detection function
    Ping_Stat_1     #DNS检测函数调用
    code1=`echo $?`
elif [ $# -eq "2" ]
then
    dns1=$1;dns_file=$2
    echo -e "DNS:$dns1\tDNS_File:$PWD/$dns_file\n"
    dns_file_cleck    
    Ping_Stat_1 
    code1=`echo $?` 
    echo $code1
elif [ $# -eq "3" ]
then
    dns1=$1;dns2=$2;dns_file=$3
    echo -e "DNS:$dns1 $dns2\tDNS_File:$PWD/$dns_file\n"
    dns_file_cleck  
    Ping_Stat_1 
    code1=`echo $?`
    Ping_Stat_2 
    code2=`echo $?`

elif [ $# -eq "4" ]
then
    dns1=$1;dns2=$2;dns3=$3;dns_file=$4
    echo -e "DNS:$dns1 $dns2 $dns3\tDNS_File:$PWD/$dns_file\n"
    dns_file_cleck 
    Ping_Stat_1 
    code1=`echo $?`
    Ping_Stat_2 
    code2=`echo $?`
    Ping_Stat_3 
    code3=`echo $?`

else
    echo -e "Usage: $0 dns1 dns2 dns3 dns_file"
    exit
fi

echo -e "》》》DNS连通性检测中,请稍等》》》"

#DNS解析控制及解析功能实现
if [ "$code1" == 100 ];then
    echo -e "-------------------------------------------\n"
    echo -e "DNS:$dns1 OK\n"
    echo -e "DNS1(IP:$dns1)"
    echo -e "域名\t\t\tA记录/CNAME 记录"
    cat $dns_file | while read line
    do
        dig @$dns1  $line A +short | sed "s/^/$line\t\t/g" 
    done
    echo -e "\n"
elif [ "$code1" == 200 ];then
    echo -e "DNS:$dns1 NG" && echo -e "目标DNS网络不可达!\n"
fi

if [ "$code2" == 100 ];then
    echo -e "-------------------------------------------\n"
    echo -e "DNS:$dns2 OK\n"
    echo -e "DNS2(IP:$dns2)"
    echo -e "域名\t\t\tA记录/CNAME记录"
    cat $dns_file | while read line
    do
        dig @$dns2  $line A +short | sed "s/^/$line\t\t/g" 
    done
    echo -e "\n"
elif [ "$code2" == 200 ];then
    echo -e "DNS:$dns2 NG" && echo -e "目标DNS网络不可达!\n"
fi 

if [ "$code3" == 100 ];then
    echo -e "-------------------------------------------\n"
    echo -e "DNS:$dns3 OK\n"
    echo -e "DNS3(IP:$dns3)"
    echo -e "域名\t\t\tA记录/CNAME记录"
    cat $dns_file | while read line
    do
        dig @$dns3  $line A +short  | sed "s/^/$line\t\t/g" 
    done
elif [ "$code3" == 200 ];then
    echo -e "DNS:$dns3 NG" && echo -e "目标DNS网络不可达!\n"
fi

exit 0