Index: privatemsg.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/privatemsg/privatemsg.module,v
retrieving revision 1.70.2.30.2.91.2.44
diff -u -r1.70.2.30.2.91.2.44 privatemsg.module
--- privatemsg.module	26 Apr 2009 22:16:08 -0000	1.70.2.30.2.91.2.44
+++ privatemsg.module	21 May 2009 16:47:56 -0000
@@ -179,6 +179,15 @@
     'access arguments' => array('read privatemsg'),
     'type'             => MENU_CALLBACK,
   );
+  $items['user/%/messages'] = array(
+    'title' => 'Messages',
+    'page callback'    => 'drupal_get_form',
+    'page arguments'   => array('privatemsg_list', 'list', 1),
+    'access callback'  => 'privatemsg_user_tab_access',
+    'access arguments' => array(1),
+    'type' => MENU_LOCAL_TASK,
+  );
+
   return $items;
 }
 
@@ -209,6 +218,31 @@
   return TRUE;
 }
 
+/**
+ * Function to check if a user can access the messages tab on a user page.
+ *
+ * @param $uid
+ *   the user's id for whom the permission is being checked.
+ */
+function privatemsg_user_tab_access($uid) {
+  global $user;
+  $account = $user;
+  
+  // Disallow anonymous access, regardless of permissions.
+  if (!$account->uid) {
+    return FALSE;
+  }
+  // If a user is viewing own account, allow access.
+  if ($account->uid == $uid && privatemsg_user_access('read privatemsg', $account)) {
+    return TRUE;
+  }
+  // If a user has permission to view other user's messages, then allow access.
+  if (privatemsg_user_access('read all private messages', $account)) {
+    return TRUE;
+  }
+  return FALSE;
+}
+
 
 /**
  * Check access to the view messages page.