37 lines
1.1 KiB
Bash
37 lines
1.1 KiB
Bash
#!/bin/bash
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function get_domain_entry {
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IFS='.' read -r -a domain <<< "$1"
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NS="8.8.8.8"
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count=0
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pendingdomain=""
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for i in `printf '%s\n' "${domain[@]}"|tac`; do
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count=$((count+1))
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pendingdomain="${i}.${pendingdomain}"
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for j in $NS; do
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NEXTNS=`dig @${j} +timeout=1 +time=1 +tries=2 +noall +authority +answer ${pendingdomain} NS | awk '{if($4 == "NS") {print $5}}' | tr '\n' ' ' | sed -e '/^;;/d'`
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if [ -n "$NEXTNS" ];then
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NS=$NEXTNS
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break
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fi
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done
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if [ "$count" == "${#domain[@]}" ]; then
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for j in $NS; do
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rawresult=`dig @${j} +timeout=1 +time=1 +tries=2 +noall +authority +answer ${pendingdomain} A ${pendingdomain} AAAA | sed -e '/^;;/d'`
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CNAME=`echo "$rawresult" | awk '{if($4 == "CNAME") {print $5}}' | head -n 1`
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ENTRY=`echo "$rawresult" | awk '{if($4 == "A" || $4 == "AAAA") {print $5}}'`
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if [ -n "$ENTRY" ]; then
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echo "$ENTRY"
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break
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elif [ -n "$CNAME" ]; then
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ENTRY=`get_domain_entry "$CNAME"`
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echo "$ENTRY"
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break
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fi
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done
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fi
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done
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}
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result=`get_domain_entry $1`
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echo $result | tr '\n' ' '
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