How can I obtain the "Last updated" timestamp of a DDNS configuration programmatically?
After much research, I cannot find the timestamp via uci, and the /etc/init.d/ddns script does not seem to have a status subcommand.
So it's probably in /var/run/ddns, and any file ending in *.update
Thank you a lot! There is indeed one *.update file for each active configuration in the /var/run/ddns folder.
Maybe useful for anybody else trying to achieve the same result, the content of those UPDFILEs is a single timestamp in minutes. Since the absolute time on the device might not be correct (and might change), that number is instead relative to the device's uptime.
stop_section_processes "$SECTION_ID"
[ $? -gt 0 ] && write_log 7 "'SIGTERM' was send to old process" || write_log 7 "No old process"
echo $$ > $PIDFILE
# determine when the last update was
# the following lines should prevent multiple updates if hotplug fires multiple startups
# as described in Ticket #7820, but did not function if never an update take place
# i.e. after a reboot (/var is linked to /tmp)
# using uptime as reference because date might not be updated via NTP client
get_uptime CURR_TIME
[ -e "$UPDFILE" ] && {
LAST_TIME=$(cat $UPDFILE)
# check also LAST > CURR because link of /var/run to /tmp might be removed
# i.e. boxes with larger filesystems
[ -z "$LAST_TIME" ] && LAST_TIME=0
[ $LAST_TIME -gt $CURR_TIME ] && LAST_TIME=0
}
if [ $LAST_TIME -eq 0 ]; then
write_log 7 "last update: never"
else
EPOCH_TIME=$(( $(date +%s) - $CURR_TIME + $LAST_TIME ))