Index: cs.py
===================================================================
diff -u -r4ebf654ab1b0d436ce7d171bfe06c6bdc46aca47 -r029aec0d4746d8a2897e46516cf9d39629d684b5
--- cs.py	(.../cs.py)	(revision 4ebf654ab1b0d436ce7d171bfe06c6bdc46aca47)
+++ cs.py	(.../cs.py)	(revision 029aec0d4746d8a2897e46516cf9d39629d684b5)
@@ -8,13 +8,14 @@
 import time
 import logging
 from subprocess import Popen
+from cloudsync.utils.globals import EXEC_MODE_UPGRADE, EXEC_MODE_UPDATE, EXEC_MODE_NORMAL, EXEC_MODE
 
 DELAY = 0.5
+USAGE_FORMAT = "Usage: ./cs.py <start|stop|restart|status> [debug|info|warning|error] [upgrade|update|<normal>]"
 
 arguments = sys.argv
 logging_level = logging.INFO
 
-
 def get_pid():
     proc_list = list(os.popen("ps ax | grep cloud_sync.py | grep -v grep"))
     if len(proc_list) > 0:
@@ -29,9 +30,9 @@
     if cs_proc:
         print("CloudSync app already running")
     else:
-        print("Starting CloudSync app with logging level {0}".format(logging_level))
+        print("Starting CloudSync app with logging level {0} in {1} mode".format(logging_level,EXEC_MODE))
         time.sleep(DELAY)
-        Popen(['python3', 'cloud_sync.py', str(logging_level)])
+        Popen(['python3', 'cloud_sync.py', str(logging_level),EXEC_MODE])
 
 
 def stop():
@@ -44,34 +45,52 @@
         print("CloudSync app is not running.")
 
 
-if len(arguments) == 2 or len(arguments) == 3:
-    if len(arguments) == 3:
-        if arguments[2] == "debug":
-            logging_level = logging.DEBUG
-        elif arguments[2] == "info":
-            logging_level = logging.INFO
-        elif arguments[2] == "warning":
-            logging_level = logging.WARNING
-        elif arguments[2] == "error":
-            logging_level = logging.ERROR
-        else:
-            print("Usage: ./cs.py <start|stop|restart|status> [debug|info|warning|error]")
-    if arguments[1] == "start":
+if len(arguments) <= 1:
+    print(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)
+        sys.exit(104)
+
+if len(arguments) >= 3:
+    argument=arguments[2]
+    if argument == "debug":
+        logging_level = logging.DEBUG
+    elif argument == "info":
+        logging_level = logging.INFO
+    elif argument == "warning":
+        logging_level = logging.WARNING
+    elif argument== "error":
+        logging_level = logging.ERROR
+    else:
+        print("incorrect {0} argument".format(argument))
+        print(USAGE_FORMAT)
+        sys.exit(103)
+
+if len(arguments) >= 2:
+    argument=arguments[1]
+    if argument == "start":
         start()
-    elif str(arguments[1]) == "stop":
+    elif argument == "stop":
         stop()
-    elif arguments[1] == "restart":
+    elif argument == "restart":
         print("Restarting CloudSync app...")
         time.sleep(DELAY)
         stop()
         start()
-    elif arguments[1] == "status":
+    elif argument == "status":
         cs_proc = get_pid()
         if cs_proc:
             print("CloudSync app IS running")
         else:
             print("CloudSync app IS NOT running")
     else:
-        print("Usage: ./cs.py <start|stop|restart|status> [debug|info|warning|error]")
-else:
-    print("Usage: ./cs.py <start|stop|restart|status> [debug|info|warning|error]")
+        print("incorrect {0} argument".format(argument))
+        print(USAGE_FORMAT)
+        sys.exit(102)
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