openbsd-tools/cron/unbound-dhcpd-updater

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Executable file

#!/usr/local/bin/bash
set -euo pipefail
readonly DHCPD_CONF_FILE='/etc/dhcpd.conf'
readonly DHCPD_LEASES_FILE='/var/db/dhcpd.leases'
readonly UNBOUND_LOCAL_DATA_FILE='/var/unbound/etc/local-data-dhcpd.conf'
UNBOUND_LOCAL_DATA_FILE_TMP="$(mktemp)"
readonly UNBOUND_LOCAL_DATA_FILE_TMP
get_file_modify_time() {
stat -f %m "$1"
}
if [ -e "$UNBOUND_LOCAL_DATA_FILE" ]; then
UNBOUND_LOCAL_DATA_FILE_MODIFY_TIME="$(get_file_modify_time "$UNBOUND_LOCAL_DATA_FILE")"
if [ "$UNBOUND_LOCAL_DATA_FILE_MODIFY_TIME" -gt "$(get_file_modify_time "$DHCPD_CONF_FILE")" ]; then
if [ "$UNBOUND_LOCAL_DATA_FILE_MODIFY_TIME" -gt "$(get_file_modify_time "$DHCPD_LEASES_FILE")" ]; then
exit 0
fi
fi
fi
../dhcpd/list_active_assignments | ../unbound/local-data-file-generator > "$UNBOUND_LOCAL_DATA_FILE_TMP"
mv "$UNBOUND_LOCAL_DATA_FILE_TMP" "$UNBOUND_LOCAL_DATA_FILE"
chmod 644 "$UNBOUND_LOCAL_DATA_FILE"
rcctl reload unbound