? .cvsignore
? 721400-delete-if-stale-137-D6.patch
? foo.sq3
? log.txt
? modules.1
? sdo-1035-locale_xss-23-D6.patch.txt
? sdo-1035-locale_xss-26-D6.patch.txt
? x.php
? sites/8888.127.0.0.1
? sites/all/modules
? sites/all/themes
? sites/default/files
? sites/default/files2
? sites/default/settings.php
Index: includes/common.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/common.inc,v
retrieving revision 1.756.2.82
diff -u -p -r1.756.2.82 common.inc
--- includes/common.inc	9 May 2010 14:13:31 -0000	1.756.2.82
+++ includes/common.inc	10 May 2010 18:52:13 -0000
@@ -2048,7 +2048,7 @@ function _drupal_load_stylesheet($matche
  * Delete all cached CSS files.
  */
 function drupal_clear_css_cache() {
-  file_scan_directory(file_create_path('css'), '.*', array('.', '..', 'CVS'), 'file_delete', TRUE);
+  file_scan_directory(file_create_path('css'), '.*', array('.', '..', 'CVS'), '_drupal_delete_file_if_stale', TRUE);
 }
 
 /**
@@ -2424,10 +2424,21 @@ function drupal_build_js_cache($files, $
  * Delete all cached JS files.
  */
 function drupal_clear_js_cache() {
-  file_scan_directory(file_create_path('js'), '.*', array('.', '..', 'CVS'), 'file_delete', TRUE);
+  file_scan_directory(file_create_path('js'), '.*', array('.', '..', 'CVS'), '_drupal_delete_file_if_stale', TRUE);
   variable_set('javascript_parsed', array());
 }
 
+
+/**
+ * Callback to delete files modified more than a set time ago.
+ */
+function _drupal_delete_file_if_stale($filepath) {
+  // Default stale file threshold is 30 days.
+  if (time() - filemtime($filepath) > variable_get('drupal_stale_file_threshold', 2592000)) {
+    file_delete($filepath);
+  }
+}
+
 /**
  * Converts a PHP variable into its Javascript equivalent.
  *