Handle permission denied errors returned by firmware revision 1.0.02.01300. Version bump.

src/libprs500/__init__.py

@@ -37,7 +37,7 @@ You may have to adjust the GROUP and the location of the rules file to
 suit your distribution.
 """
 
-__version__   = "0.3.8"
+__version__   = "0.3.9"
 __docformat__ = "epytext"
 __author__    = "Kovid Goyal <kovid@kovidgoyal.net>"
 

src/libprs500/communicate.py

@@ -427,7 +427,7 @@ class PRS500Device(Device):
                                                     response_type=ListResponse)
         data = self._bulk_read(0x28, data_type=FileProperties, \
                                            command_number=PathQuery.NUMBER)[0]
-        if path.endswith("/"): 
+        if path.endswith('/') and path != '/': 
             path = path[:-1]
         if res.path_not_found : 
             raise PathError(path + " does not exist on device")
@@ -435,6 +435,8 @@ class PRS500Device(Device):
             raise PathError(path + " is not a valid path")
         if res.is_unmounted: 
             raise PathError(path + " is not mounted")
+        if res.permission_denied:
+            raise PathError('Permission denied for: ' + path)
         if res.code not in (0, PathResponseCodes.IS_FILE):
             raise PathError(path + " has an unknown error. Code: " + \
                                         hex(res.code))

src/libprs500/prstypes.py

@@ -57,6 +57,7 @@ class PathResponseCodes(object):
     INVALID      = 0xfffffff9
     IS_FILE      = 0xffffffd2
     HAS_CHILDREN = 0xffffffcc
+    PERMISSION_DENIED = 0xffffffd6
 
 
 class TransferBuffer(list):
@@ -675,6 +676,7 @@ class ListResponse(Response):
     IS_UNMOUNTED   = 0xffffffc8 
     IS_EOL         = 0xfffffffa #: There are no more entries in the list
     PATH_NOT_FOUND = 0xffffffd7 #: Queried path is not found 
+    PERMISSION_DENIED = 0xffffffd6 #: Permission denied
     
     @apply
     def is_file():
@@ -697,6 +699,13 @@ class ListResponse(Response):
             return self.code == ListResponse.PATH_NOT_FOUND
         return property(doc=doc, fget=fget)
     
+    @apply
+    def permission_denied():
+        doc = """ True iff permission is denied for path operations """
+        def fget(self):    
+            return self.code == ListResponse.PERMISSION_DENIED
+        return property(doc=doc, fget=fget)
+    
     @apply
     def is_unmounted():
         doc = """ True iff queried path is unmounted (i.e. removed storage card) """