temp="$(mktemp)"
trap "rm -f '$temp'" EXIT
-LC_ALL=C timedatectl > "$temp"
-ut=$(sed '/Universal time:/ { s/^[^:]*: *//; p}; d' "$temp")
-rtc=$(sed '/RTC time:/ { s/^[^:]*: *//; p}; d' "$temp")
-ntpenabled=$(sed '/\(NTP enabled\|Network time on\|NTP service\):/ { s/^[^:]*: *//; p}; d' "$temp")
-ntpsynced=$(sed '/\(NTP synchronized\|System clock synchronized\):/ { s/^[^:]*: *//; p}; d' "$temp")
+systemdversion="$(timedatectl --version | head -n1 | awk '{print $2}')"
+if [ -z "$systemdversion" ]; then
+ echo "Unknown: Cannot get systemd version"
+ exit 3
+fi
+if [ "$systemdversion" -lt 241 ] ; then # before buster (Debian 10)
+ LC_ALL=C timedatectl > "$temp"
+ ut=$(sed '/Universal time:/ { s/^[^:]*: *//; p}; d' "$temp")
+ rtc=$(sed '/RTC time:/ { s/^[^:]*: *//; p}; d' "$temp")
+ ntpenabled=$(sed '/\(NTP enabled\|Network time on\|NTP service\):/ { s/^[^:]*: *//; p}; d' "$temp")
+ ntpsynced=$(sed '/\(NTP synchronized\|System clock synchronized\):/ { s/^[^:]*: *//; p}; d' "$temp")
+else
+ LC_ALL=C timedatectl show > "$temp"
+ ut=$(sed '/^TimeUSec=/ { s/^[^=]*=//; p}; d' "$temp")
+ rtc=$(sed '/^RTCTimeUSec=/ { s/^[^=]*=//; p}; d' "$temp")
+ ntpenabled=$(sed '/^NTP=/ { s/^[^=]*=//; p}; d' "$temp")
+ ntpsynced=$(sed '/^NTPSynchronized=/ { s/^[^=]*=//; p}; d' "$temp")
+ if [ "$ntpenabled" = "no" ]; then # in buster (Debian 10) ntpenabled no longer also considers the ntp service
+ ntp_status=$(systemctl is-enabled 'ntp.service' 2>/dev/null) && rc=$? || rc=$?
+ if [ "$rc" = 0 ] && [ "$ntp_status" = "enabled" ] ; then
+ if systemctl --quiet is-active ntp.service; then
+ ntpenabled=yes
+ fi
+ fi
+ fi
+fi
uts=$(TZ=UTC date -d "$ut" +%s)
rtcs=$(TZ=UTC date -d "$rtc" +%s 2>/dev/null || echo "N/A")