libSM

X Session Management library

The X Session Management Protocol provides a uniform mechanism for users to save and restore their sessions. A session is a group of X clients (programs), each of which has a particular state. The session is controlled by a network service called the session manager, which issues commands to its clients on behalf of the user. These commands may cause clients to save their state or to terminate. It is expected that the client will save its state in such a way that the client can be restarted at a later time and resume its operation as if it had never been terminated.