[time-nuts] Observations of NTP during the leap second

[Deirdre O'Byrne]

My setup is a raspberry pi running Linux 4.1.19 and ntpd version 4.2.6p5.
It's being fed a PPS signal from a GPS receiver, and also checks the time
against the ntp pool.

For the second starting at 23:59:58.0 UTC, NTP was reporting second number
0xdc12c4fe, and had its leap second flag set.

For the second starting at 23:59:59.0 UTC, NTP was reporting second number
0xdc12c4ff, and the leap second flag was *not* set!

For the second starting at 23:59:60.0 UTC, NTP was again reporting second
number 0xdc12c4ff, and the leap second flag was not set.

For the second starting at 00:00:00.0 UTC, NTP was reporting second number
0xdc12c500, and the leap second flag was not set.

I would have thought NTP would have the leap second flag set at least until
23:59:60.0.