--- a/MoinMoin/config/multiconfig.py	Tue Jul 25 00:46:41 2006 +0200
+++ b/MoinMoin/config/multiconfig.py	Tue Jul 25 00:53:08 2006 +0200
@@ -7,8 +7,12 @@
     @license: GNU GPL, see COPYING for details.
 """
 
-import re, os, sys
-from MoinMoin import error
+import re
+import os
+import sys
+import time
+
+from MoinMoin import error, util
 import MoinMoin.auth as authmodule
 
 _url_re_cache = None
@@ -547,6 +551,37 @@
 
         # check if mail is possible and set flag:
         self.mail_enabled = (self.mail_smarthost is not None or self.mail_sendmail is not None) and self.mail_from
+        
+        # interwiki ID processing
+        self.load_IWID()
+
+    def load_IWID(self):
+        """ Loads the InterWikiID of this instance. It is used to identify the instance
+            globally.
+            The data file can be found in data/IWID
+            The IWID is available as cfg.iwid
+            The full IWID containing the interwiki name is available as cfg.iwid_full
+        """
+        iwid_path = os.path.join(self.data_dir, "IWID")
+
+        try:
+            iwid_file = file(iwid_path, "rb")
+            iwid = iwid_file.readline().strip()
+            iwid_file.close()
+        except IOError:
+            iwid = None
+
+        if iwid is None:
+            iwid = util.random_string(16).encode("hex") + "-" + str(int(time.time()))
+            iwid_file = file(iwid_path, "wb")
+            iwid_file.write(iwid)
+            iwid_file.close()
+
+        self.iwid = iwid
+        if self.interwikiname is not None:
+            self.iwid_full = iwid + ":" + self.interwikiname
+        else:
+            self.iwid_full = iwid
 
     def _config_check(self):
         """ Check namespace and warn about unknown names