Index: /trunk/source/pyhesiodfs/pyHesiodFS.py
===================================================================
--- /trunk/source/pyhesiodfs/pyHesiodFS.py (revision 160)
+++ /trunk/source/pyhesiodfs/pyHesiodFS.py (revision 161)
@@ -10,5 +10,5 @@
 #
 
-import sys, os, stat, errno
+import sys, os, stat, errno, time
 from syslog import *
 import fuse
@@ -40,5 +40,30 @@
             print 'defaultdict(%s, %s)' % (self.default_factory, 
                                            super(defaultdict, self).__str__())
-        
+
+class negcache(dict):
+    """
+    A set-like object that automatically expunges entries after
+    they're been there for a certain amount of time.
+    
+    This only supports add, remove, and __contains__
+    """
+    
+    def __init__(self, cache_time):
+        self.cache_time = cache_time
+    
+    def add(self, obj):
+        self[obj] = time.time()
+    
+    def remove(self, obj):
+        del self[obj]
+    
+    def __contains__(self, k):
+        if super(negcache, self).__contains__(k):
+            if self[k] + self.cache_time > time.time():
+                return True
+            else:
+                del self[k]
+        return False
+
 new_fuse = hasattr(fuse, '__version__')
 
@@ -91,4 +116,8 @@
             self.fuse_args.add("fsname", "pyHesiodFS")
         self.mounts = defaultdict(dict)
+        
+        # Cache deletions for 10 seconds - should give people time to
+        # make a new symlink
+        self.negcache = negcache(10)
     
     def _user(self):
@@ -105,5 +134,5 @@
             st.st_size = len(hello_str)
         elif '/' not in path[1:]:
-            if self.findLocker(path[1:]):
+            if path[1:] not in self.negcache and self.findLocker(path[1:]):
                 st.st_mode = stat.S_IFLNK | 0777
                 st.st_uid = self._user()
@@ -183,4 +212,5 @@
         elif '/' not in path[1:]:
             del self.mounts[self._user()][path[1:]]
+            self.negcache.add(path[1:])
         else:
             return -errno.EPERM