36 lines
673 B
Bash
Executable File
36 lines
673 B
Bash
Executable File
#!/bin/sh
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cache=.update_ip.cache
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server=ns1.example.com
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zone=dyn.example.com
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host=desktop
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secret=""
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ip=$(wget -q -O - http://treehouse.org.za/ip)
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set_ip=$(dig +short ${host}.${zone})
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if [ -z ${ip} ] || [ -z ${cache} ]; then
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exit;
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fi
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if [ -f "${HOME}/${cache}" ]; then
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old_ip=$(cat "${HOME}/${cache}")
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fi
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if [ "${set_ip}" = "${ip}" ] && [ "${ip}" = "${old_ip}" ]; then
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exit;
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else
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rm -f "${HOME}/${cache}"
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echo "${ip}" > "${HOME}/${cache}"
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fi
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cat <<EOF | nsupdate
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server ${server}
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zone ${zone}.
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key ${host}.${zone} ${secret}
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update delete ${host}.${zone}.
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update add ${host}.${zone}. 60 A $ip
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update add ${host}.${zone}. 60 TXT "Updated on $(date)"
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send
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EOF
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