Index: docs/developer/hooks/core.php
===================================================================
RCS file: /cvs/drupal-contrib/contributions/docs/developer/hooks/core.php,v
retrieving revision 1.171
diff -u -p -r1.171 core.php
--- docs/developer/hooks/core.php	15 Apr 2008 14:58:32 -0000	1.171
+++ docs/developer/hooks/core.php	29 Apr 2008 21:23:30 -0000
@@ -464,20 +464,22 @@ function hook_exit($destination = NULL) 
 /**
  * Allow file downloads.
  *
- * @param $file
+ * @param $filepath
  *   String of the file's path.
  * @return
  *   If the user does not have permission to access the file, return -1. If the
- *   user has permission, return an array with the appropriate headers.
+ *   user has permission, return an array with the appropriate headers. If the file
+ *   is not controlled by the current module, the return value should be NULL.
  */
-function hook_file_download($file) {
-  if (user_access('access content')) {
-    if ($filemime = db_result(db_query("SELECT filemime FROM {fileupload} WHERE filepath = '%s'", file_create_path($file)))) {
+function hook_file_download($filepath) {
+  // Check if the file is controlled by the current module.
+  if ($filemime = db_result(db_query("SELECT filemime FROM {fileupload} WHERE filepath = '%s'", file_create_path($filepath)))) {
+    if (user_access('access content')) {
       return array('Content-type:' . $filemime);
     }
-  }
-  else {
-    return -1;
+    else {
+      return -1;
+    }
   }
 }