Index: cs.py
===================================================================
diff -u -r029aec0d4746d8a2897e46516cf9d39629d684b5 -r99d35f3d5898d50372e1745b96b393db40cd8394
--- cs.py	(.../cs.py)	(revision 029aec0d4746d8a2897e46516cf9d39629d684b5)
+++ cs.py	(.../cs.py)	(revision 99d35f3d5898d50372e1745b96b393db40cd8394)
@@ -10,8 +10,13 @@
 from subprocess import Popen
 from cloudsync.utils.globals import EXEC_MODE_UPGRADE, EXEC_MODE_UPDATE, EXEC_MODE_NORMAL, EXEC_MODE
 
+logging.basicConfig(format='%(message)s', level=logging.INFO)
+logger = logging.getLogger(__name__)
+
 DELAY = 0.5
-USAGE_FORMAT = "Usage: ./cs.py <start|stop|restart|status> [debug|info|warning|error] [upgrade|update|<normal>]"
+SENTINEL_FILE = "/tmp/cloudsync_restart_sentinel"
+SENTINEL_CHECK_INTERVAL = 5
+USAGE_FORMAT = "Usage: ./cs.py <start|stop|restart|status|monitor> [debug|info|warning|error] [upgrade|update|<normal>]"
 
 arguments = sys.argv
 logging_level = logging.INFO
@@ -28,34 +33,51 @@
 def start():
     cs_proc = get_pid()
     if cs_proc:
-        print("CloudSync app already running")
+        logger.info("CloudSync app already running")
     else:
-        print("Starting CloudSync app with logging level {0} in {1} mode".format(logging_level,EXEC_MODE))
+        logger.info("Starting CloudSync app with logging level %s in %s mode", logging_level, EXEC_MODE)
         time.sleep(DELAY)
         Popen(['python3', 'cloud_sync.py', str(logging_level),EXEC_MODE])
 
 
 def stop():
     cs_proc_pid = get_pid()
     if cs_proc_pid:
-        print("Stopping CloudSync app...")
+        logger.info("Stopping CloudSync app...")
         time.sleep(DELAY)
-        os.kill(int(cs_proc_pid), signal.SIGKILL)
+        os.kill(int(cs_proc_pid), signal.SIGTERM)
     else:
-        print("CloudSync app is not running.")
+        logger.info("CloudSync app is not running.")
 
 
+def monitor():
+    """Monitor sentinel file and restart CloudSync when detected."""
+    logger.info("Monitoring sentinel file: %s (interval %ds)", SENTINEL_FILE, SENTINEL_CHECK_INTERVAL)
+    start()
+    while True:
+        if os.path.isfile(SENTINEL_FILE):
+            logger.info("Sentinel file detected — restarting CloudSync")
+            try:
+                os.remove(SENTINEL_FILE)
+            except OSError:
+                pass
+            stop()
+            time.sleep(1)
+            start()
+        time.sleep(SENTINEL_CHECK_INTERVAL)
+
+
 if len(arguments) <= 1:
-    print(USAGE_FORMAT)
+    logger.error(USAGE_FORMAT)
     sys.exit(101)
 
 if len(arguments) >= 4:
     argument=arguments[3]
     if argument in ( EXEC_MODE_UPGRADE, EXEC_MODE_UPDATE, EXEC_MODE_NORMAL ):
         EXEC_MODE=argument
     else:
-        print("incorrect {0} argument".format(argument))
-        print(USAGE_FORMAT)
+        logger.error("incorrect %s argument", argument)
+        logger.error(USAGE_FORMAT)
         sys.exit(104)
 
 if len(arguments) >= 3:
@@ -69,8 +91,8 @@
     elif argument== "error":
         logging_level = logging.ERROR
     else:
-        print("incorrect {0} argument".format(argument))
-        print(USAGE_FORMAT)
+        logger.error("incorrect %s argument", argument)
+        logger.error(USAGE_FORMAT)
         sys.exit(103)
 
 if len(arguments) >= 2:
@@ -80,17 +102,19 @@
     elif argument == "stop":
         stop()
     elif argument == "restart":
-        print("Restarting CloudSync app...")
+        logger.info("Restarting CloudSync app...")
         time.sleep(DELAY)
         stop()
         start()
     elif argument == "status":
         cs_proc = get_pid()
         if cs_proc:
-            print("CloudSync app IS running")
+            logger.info("CloudSync app IS running")
         else:
-            print("CloudSync app IS NOT running")
+            logger.info("CloudSync app IS NOT running")
+    elif argument == "monitor":
+        monitor()
     else:
-        print("incorrect {0} argument".format(argument))
-        print(USAGE_FORMAT)
+        logger.error("incorrect %s argument", argument)
+        logger.error(USAGE_FORMAT)
         sys.exit(102)
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