Please bear with me on this slightly odd request!
I have a [debian linux] system with an internal [RTC] clock which the user can adjust or change. It may or may not be connected to external IP and therefore may or may not have access to NTP. I would like to provide an option in the clock setting UI to "set from NTP" if it is available, but I don't want the system clock to be constantly updated from NTP.
- How can I configure ntpd to be active, but not update the system clock?
- How can I read and display the 'ntp time' (which will be shown along with the system clock)?
system is debian jessie. reading and displaying the time in C or python.