timesyncd: enable watchdog support

src/timesync/timesyncd.c

@@ -976,6 +976,8 @@ static int manager_new(Manager **ret) {
         if (r < 0)
                 return r;
 
+        sd_event_set_watchdog(m->event, true);
+
         sd_event_add_signal(m->event, &m->sigterm, SIGTERM, NULL,  NULL);
         sd_event_add_signal(m->event, &m->sigint, SIGINT, NULL, NULL);
 

units/systemd-timesyncd.service.in

@@ -19,6 +19,7 @@ ExecStart=@rootlibexecdir@/systemd-timesyncd
 CapabilityBoundingSet=CAP_SYS_TIME CAP_SETUID CAP_SETGID CAP_SETPCAP
 PrivateTmp=yes
 PrivateDevices=yes
+WatchdogSec=1min
 
 [Install]
 WantedBy=multi-user.target