Ticket #394: sugar-toolkit-gtk3-2-2-Signal-to-check-free-available-space.patch

src/sugar3/datastore/datastore.py

@@ -39 +39 @@
 DS_DBUS_INTERFACE = 'org.laptop.sugar.DataStore'
 DS_DBUS_PATH = '/org/laptop/sugar/DataStore'
 
+SPACE_THRESHOLD = 52428800  # 50Mb
+
+# Error codes
+LOW_SPACE = 1
+
 _data_store = None
 
 
@@ -57 +62 @@
     return _data_store
 
 
+def free_available_space(path='/'):
+    s = os.statvfs(path)
+    return s.f_bavail * s.f_frsize
+
+
 def __datastore_created_cb(object_id):
     metadata = _get_data_store().get_properties(object_id, byte_arrays=True)
     updated.send(None, object_id=object_id, metadata=metadata)
+    if free_available_space() < SPACE_THRESHOLD:
+        error.send(None, errno=LOW_SPACE)
 
 
 def __datastore_updated_cb(object_id):
     metadata = _get_data_store().get_properties(object_id, byte_arrays=True)
     updated.send(None, object_id=object_id, metadata=metadata)
+    if free_available_space() < SPACE_THRESHOLD:
+        logging.warning('Free space below SPACE_THRESHOLD: %s Kb',
+                        SPACE_THRESHOLD)
+        error.send(None, errno=LOW_SPACE)
 
 
 def __datastore_deleted_cb(object_id):
@@ -74 +90 @@
 deleted = dispatch.Signal()
 updated = dispatch.Signal()
 
+error = dispatch.Signal()
+
 _get_data_store()