/etc/NetworkManager/dispatcher.d/20-chrony is in chrony 3.2-4ubuntu4.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 | #!/bin/sh
# This is a NetworkManager dispatcher / networkd-dispatcher script for
# chronyd to set its NTP sources online or offline when a network interface
# is configured or removed
export LC_ALL=C
# For NetworkManager consider only up/down events
[ $# -ge 2 ] && [ "$2" != "up" ] && [ "$2" != "down" ] && exit 0
# Note: for networkd-dispatcher routable.d ~= on and off.d ~= off
# Check if there is a default route
if /sbin/ip route list 2> /dev/null | grep -q '^default'; then
chronyc online > /dev/null 2>&1
exit 0
fi
sources=$(chronyc -c -n sources 2> /dev/null)
[ $? -ne 0 ] && exit 0
# Check each configured source if it has a route
echo "$sources" | while IFS=, read mode state address rest; do
[ "$mode" != '^' ] && [ "$mode" != '=' ] && continue
/sbin/ip route get "$address" > /dev/null 2>&1 && command="online" || command="offline"
# Set priority of sources so that the selected source is set as
# last if offline to avoid unnecessary reselection
[ "$state" != '*' ] && priority=1 || priority=2
echo "$priority $command $address"
done | sort | while read priority command address; do
echo "$command $address"
done | chronyc > /dev/null 2>&1
exit 0
|