Bugfix: compatability for older systemd versions

- Older systemd versions do not support RestartPreventExitStatus
- Use exit code 0 to abort, but record code 2 in db as a workaround

scheduler/markattendance.py

@@ -23,6 +23,8 @@ fullurl = BASEURL + "/mod/attendance/view.php?id=" + cid
 def recordSchedule(db,tries,status):
     # TODO: validate response
     db.recordSchedule(day, username, cid, tries, status)
+    if status == 2:
+        exit(0)
     exit(status)
 
 

scheduler/scheduler.py

@@ -25,7 +25,7 @@ def Schedule(time, user, cid, day, capture_output=True):
                    '--unit', servicename,
                    '--on-calendar', time,
                    '--property', "Restart=on-failure",
-                   '--property', "RestartPreventExitStatus=2",
+                   # '--property', "RestartPreventExitStatus=2",
                    '--property', propResartSec,
                    # '--property', propStartLimitIntervalSec,
                    # '--property', propStartLimitBurst,