eject usb setting

actions.py

@@ -973,6 +973,11 @@ class Actions(object):
         if os.path.exists(path):
             os.remove(path)
 
+    def eject_all_usb_drives(self):
+        for i in range(1, 4):
+            if os.path.exists('/dev/sda{}'.format(i)):
+                subprocess.call(['sudo', 'eject', '/dev/sda{}'.format(i)])                
+
     # TODO: make this interrogate the various components for available routes to parse
     # this would include eg a custom script module..
     @property

data_centre/data.py

@@ -82,8 +82,11 @@ class Data(object):
 
         
     def get_ip_address(self):
-        ip = subprocess.check_output(['hostname', '-I']).decode('utf-8').split()[0]
+        ip_list = subprocess.check_output(['hostname', '-I']).decode('utf-8').split()
-        return ip
+        if len(ip_list) > 0:
+            return ip_list[0]
+        else:
+            return 'none'
 
     def get_ip_for_osc_client(self):
         if self.settings['user_input']['REMOTE_SERVER']['value'] == 'enabled':

json_objects/settings_default.json

@@ -183,6 +183,11 @@
             "action": "shutdown_pi",
             "options": [],
             "value": null
+        },
+        "EJECT_USB_DRIVES": {
+            "action": "eject_all_usb_drives",
+            "options": [],
+            "value": null
         },   
         "RESTART_OPENFRAMEWORKS": {
             "action": "restart_openframeworks",