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#!/bin/bash
# This script is a legacy. The same functionality can be implemented by setting
# up a back up task. See [conf/py-sample/sample.jsonc]
do_query () {
# dig returns 0 upon successful reception and parse of the response message.
# All the other exit codes other than 0 will cause the script to terminate
# as a result of set -e. +short option makes dig return the values of RR.
# We assume that a status code has returned when dig produces no output with
# the option. Caution must be taken in this approach as zones with no
# record will also return nothing with the status code zero.
dig +short +dnssec +notcp ANY "$TARGET" > "$tmpf"
if [ ! -s "$tmpf" ]; then
echo "The nameserver returned no RR!
DNSSEC verification probably failed." >&2
exit 1
fi
}
if [ "$#" -lt 1 ]; then
cat >&2 << EOF
The Periodic Automatic Linux Host Maintenance (PALHM) DNSSEC check
Usage: $0 <record name>
The zone must contain at least one resource record set. The nameservers
configured for the host must support DNSSEC validation.
To test your host configuration, running
\$ $0 dnssec-failed.org
should produce error messages.
EOF
exit 2
fi
declare TARGET="$1"
declare tmpf="$(mktemp --tmpdir "palhm-dnssec.XXXXXXXXXX")"
do_query & set +e
wait
ec="$?"
rm "$tmpf"
exit "$ec"
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