Index: xmlrpc.php
===================================================================
RCS file: /cvs/drupal/drupal/xmlrpc.php,v
retrieving revision 1.18
diff -r1.18 xmlrpc.php
20c20
< drupal_alter('xmlrpc_alter', $services);
---
> drupal_alter('xmlrpc', $services);
Index: modules/system/system.api.php
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.api.php,v
retrieving revision 1.108
diff -r1.108 system.api.php
1131a1132,1169
>  * Alter the definition of XML-RPC methods before they are called.
>  *
>  * This hook lets at module modify the callback definition for already
>  * declared XML-RPC methods, when they are being invoked by a client.
>  *
>  * This hook is invoked by xmlrpc.php. The method definitions are
>  * passed in by reference. Each element of the $methods array is one
>  * callback definition returned by a module from hook_xmlrpc. Additional
>  * methods may be added, or existing items altered.
>  *
>  * Modules implementing this hook must take care of the fact that
>  * hook_xmlrpc allows two distinct and incompatible formats for callback
>  * definition, so module must be prepared to handle either format for
>  * each callback being altered.
>  *
>  * @see hook_xmlrpc()
>  *
>  * @param $methods
>  *   Associative array of method callback definitions returned from
>  *   hook_xmlrpc.
>  */
> function hook_xmlrpc_alter(&$methods) {
> 
>   // Direct update for methods defined the simple way
>   $methods['drupal.login'] = 'mymodule_login';
> 
>   // Lookup update for methods defined the complex way
>   foreach ($methods as $key => &$method) {
>     if (!is_int($key)) {
>       continue;
>     }
>     if ($method[0] == 'drupal.site.ping') {
>       $method[1] = 'mymodule_directory_ping';
>     }
>   }
> }
> 
> /**