Index: /trunk/source/pyhesiodfs/pyHesiodFS.py
===================================================================
--- /trunk/source/pyhesiodfs/pyHesiodFS.py (revision 163)
+++ /trunk/source/pyhesiodfs/pyHesiodFS.py (revision 165)
@@ -38,6 +38,6 @@
         
         def __str__(self):
-            print 'defaultdict(%s, %s)' % (self.default_factory, 
-                                           super(defaultdict, self).__str__())
+            return 'defaultdict(%s, %s)' % (self.default_factory, 
+                                            super(defaultdict, self).__str__())
 
 class negcache(dict):
@@ -49,5 +49,5 @@
     """
     
-    def __init__(self, cache_time):
+    def __init__(self, cache_time=0.5):
         self.cache_time = cache_time
     
@@ -56,5 +56,8 @@
     
     def remove(self, obj):
-        del self[obj]
+        try:
+            del self[obj]
+        except KeyError:
+            pass
     
     def __contains__(self, k):
@@ -119,13 +122,20 @@
         # Cache deletions for half a second - should give `ln -nsf`
         # enough time to make a new symlink
-        self.negcache = negcache(0.5)
-    
-    def _user(self):
+        self.negcache = defaultdict(negcache)
+    
+    def _uid(self):
         return fuse.FuseGetContext()['uid']
+    
+    def _gid(self):
+        return fuse.FuseGetContext()['gid']
+    
+    def _pid(self):
+        return fuse.FuseGetContext()['pid']
     
     def getattr(self, path):
         st = MyStat()
         if path == '/':
-            st.st_mode = stat.S_IFDIR | 0777
+            st.st_mode = stat.S_IFDIR | 0775
+            st.st_gid = self._gid()
             st.st_nlink = 2
         elif path == hello_path:
@@ -134,7 +144,7 @@
             st.st_size = len(hello_str)
         elif '/' not in path[1:]:
-            if path[1:] not in self.negcache and self.findLocker(path[1:]):
+            if path[1:] not in self.negcache[self._pid()] and self.findLocker(path[1:]):
                 st.st_mode = stat.S_IFLNK | 0777
-                st.st_uid = self._user()
+                st.st_uid = self._uid()
                 st.st_nlink = 1
                 st.st_size = len(self.findLocker(path[1:]))
@@ -149,10 +159,10 @@
 
     def getCachedLockers(self):
-        return self.mounts[self._user()].keys()
+        return self.mounts[self._uid()].keys()
 
     def findLocker(self, name):
         """Lookup a locker in hesiod and return its path"""
-        if name in self.mounts[self._user()]:
-            return self.mounts[self._user()][name]
+        if name in self.mounts[self._uid()]:
+            return self.mounts[self._uid()][name]
         else:
             try:
@@ -171,5 +181,5 @@
                     return None
                 else:
-                    self.mounts[self._user()][name] = pointer['location']
+                    self.mounts[self._uid()][name] = pointer['location']
                     syslog(LOG_INFO, "Mounting "+name+" on "+pointer['location'])
                     return pointer['location']
@@ -211,7 +221,6 @@
             return -errno.EPERM
         elif '/' not in path[1:]:
-            self.mounts[self._user()][path[1:]] = src
-            self.negcache.remove(path[1:])
-            print self.mounts[self._user()]
+            self.mounts[self._uid()][path[1:]] = src
+            self.negcache[self._pid()].remove(path[1:])
         else:
             return -errno.EPERM
@@ -221,6 +230,6 @@
             return -errno.EPERM
         elif '/' not in path[1:]:
-            del self.mounts[self._user()][path[1:]]
-            self.negcache.add(path[1:])
+            del self.mounts[self._uid()][path[1:]]
+            self.negcache[self._pid()].add(path[1:])
         else:
             return -errno.EPERM