DESCRIPTION
  smproxy allows X applications that do not support X11R6 session management to participate in an X11R6 session.
 
 
In order for 
smproxy to act as a proxy for an X application, one of the following must be true:
 
 
- The application maps a top level window containing the  
WM_CLIENT_LEADER property.  This property provides a pointer to the client leader window which contains the  
WM_CLASS, 
WM_NAME,  
WM_COMMAND, and 
WM_CLIENT_MACHINE properties.
 
 
or ...
 
 
- The application maps a top level window which does not contain the  
WM_CLIENT_LEADER property.  However, this top level window contains the  
WM_CLASS, 
WM_NAME, 
WM_COMMAND, and  
WM_CLIENT_MACHINE properties.
An application that support the WM_SAVE_YOURSELF protocol will receive a  WM_SAVE_YOURSELF client message each time the session manager issues a checkpoint or shutdown.  This allows the application to save state.  If an application does not support the  WM_SAVE_YOURSELF protocol, then the proxy will provide enough information to the session manager to restart the application (using  WM_COMMAND), but no state will be restored.