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-rw-r--r--debian/extra/dhclient-exit-hooks.d/timesyncd42
1 files changed, 42 insertions, 0 deletions
diff --git a/debian/extra/dhclient-exit-hooks.d/timesyncd b/debian/extra/dhclient-exit-hooks.d/timesyncd
new file mode 100644
index 0000000..3cde992
--- /dev/null
+++ b/debian/extra/dhclient-exit-hooks.d/timesyncd
@@ -0,0 +1,42 @@
+TIMESYNCD_CONF=/run/systemd/timesyncd.conf.d/01-dhclient.conf
+
+timesyncd_servers_setup_remove() {
+ if [ -e $TIMESYNCD_CONF ]; then
+ rm -f $TIMESYNCD_CONF
+ systemctl try-restart systemd-timesyncd.service || true
+ fi
+}
+
+timesyncd_servers_setup_add() {
+ if [ ! -d /run/systemd/system ]; then
+ return
+ fi
+
+ if [ -e $TIMESYNCD_CONF ] && [ "$new_ntp_servers" = "$old_ntp_servers" ]; then
+ return
+ fi
+
+ if [ -z "$new_ntp_servers" ]; then
+ timesyncd_servers_setup_remove
+ return
+ fi
+
+ mkdir -p $(dirname $TIMESYNCD_CONF)
+ cat <<EOF > ${TIMESYNCD_CONF}.new
+# NTP server entries received from DHCP server
+[Time]
+NTP=$new_ntp_servers
+EOF
+ mv ${TIMESYNCD_CONF}.new ${TIMESYNCD_CONF}
+ systemctl try-restart systemd-timesyncd.service || true
+}
+
+
+case $reason in
+ BOUND|RENEW|REBIND|REBOOT)
+ timesyncd_servers_setup_add
+ ;;
+ EXPIRE|FAIL|RELEASE|STOP)
+ timesyncd_servers_setup_remove
+ ;;
+esac