25 lines
569 B
Bash
Executable File
25 lines
569 B
Bash
Executable File
#! /usr/bin/env bash
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set -e
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# Expect either a domain, or a domain and a record type
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if [ $# -lt 1 ] || [ $# -gt 2 ]; then
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echo "Usage: dig-authoritative <domain> [record type]"
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exit 1
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fi
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DOMAIN=$1
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RECORD_TYPE=${2:-A}
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# Look up the authoritative name servers for the domain
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AUTH_NS=$(dig +short NS $DOMAIN | head -n 1)
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# If there are no authoritative name servers, the domain doesn't exist
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if [ -z "$AUTH_NS" ]; then
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echo "Cannot find authoritative name servers for $DOMAIN" >&2
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exit 1
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fi
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# Now, do a proper query
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dig @$AUTH_NS $DOMAIN $RECORD_TYPE
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exit $?
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