Fix some formatting.

lib/mdb/db.py

@@ -5,7 +5,7 @@
 # itself while defining objects that the database will return.
 #
 
-import rcs, re
+import rcs, os
 
 
 #
@@ -50,11 +50,19 @@ class PVVDB:
     def __init__(self, base):
         # Find the record definition file, read it, verify it and
         # set the legal set of fields.
-        pass
+        self.base  = base               # base database directory
+        self.locks = []                 # list of activated locks
+        self.rcs   = rcs.RCS()          # an RCS interface function
 
     def __del__(self):
         # clean up locks and such before being deleted.
-        pass
+        for username in self.locks:
+            self.rcs.unlock(username)
+
+    def __filename(self, username):
+        # transform the username into a tuple with the full name of
+        # the databasefile and the latest revision number.
+        return self.rcs.rcsname(os.path.join(self.base, username))
 
     def __format(self, file_path):
         # parses and verifies the .format files for a database.
@@ -70,11 +78,15 @@ class PVVDB:
             fmt[name] = value
         return fmt
 
-    def lock(self, username):
+    def lock(self, username, pedantic=False):
         # Lock the record.
-        pass
+        if username in self.locks and pedantic:
+            raise PVVDBError, "%s already locked." % `username`
+        self.rcs.lock(self.__filename(username))
+        self.locks.append(username)
         
-    def unlock(self, username):
+
+    def unlock(self, username, pedantic=False):
         # Unlock the record.
         pass