使用dig检查bash中的域可用性

时间:2014-10-31 23:37:57

标签: bash dig

我目前正在尝试编写一个脚本,用于写出它检测到的域名。第一个想法是写出任何包含" NXDOMAIN",但最终包括我发现我无法注册的域名。所以我添加了对#34; a.gtld的要求-servers.net"也。问题是,这两个条件都在域名上得到满足。关于我可以使用什么来过滤我的结果,我完全没有想法。

有没有人有任何想法?这是我的代码:

function getResponse () {
   output=$(dig $1.com +nostats +noanswer +noquestion)
     if [[ $output == *NXDOMAIN* ]] && [[ $output == *a.gtld-servers.net.* ]];  then
   echo "$1.com"
     fi
 }

for v in {a..z}; do
  for w in {a..z}; do
    for x in {a..z}; do
      getResponse $v$w$x &
      sleep 0.01s
    done
  done
done

for v in {a..z}; do
  for w in {a..z}; do
    for x in {a..z}; do
      for y in {a..z}; do
        getResponse $v$w$x$y &
        sleep 0.01s
      done
    done
  done
done

1 个答案:

答案 0 :(得分:4)

这是一个似乎有效的脚本:

#! /bin/bash

do_query () # name
{
    dig "$1" +noquestion +nostat +noanswer +noauthority 2> /dev/null
}

get_answers_number () # name
{
    local res=$(do_query "$1")
    res=${res##*ANSWER: }
    echo "${res%%,*}"
}

# Unregistered domains saved in file
file="unregistered.txt"
echo "Results will be saved in $file"

for adr in {a..z}{a..z}{a..z} {a..z}{a..z}{a..z}{a..z}
do
    name="$adr.com"
    printf "Checking %s ...\r" "$name"
    r=$(get_answers_number "$name")
    if ((r==0)); then
        echo "Found $name            "
        echo "$name" >&3
    fi
done 3>| "$file"