Sending and Receiving Messages in a Networked Environment

You can use the ToolTalk service in a networked environment; for example, you can start a tool on a different machine or join a session that is running on a different machine. To do so, invoke a ttsession with either the -c or -p option.

• The -c option will invoke the named program and place the right session id in its TT_SESSION environment variable. For example, the command

  ttsession -c dtterm

defines TT_SESSION in that cmdtool and any ToolTalk client you run with the environment variable $TT_SESSION set to its value will join the session owned by this ttsession.

• The -p option prints the session id to standard output. ttsession then forks into the background to run that session.

To join the session, an application must either pass the session id to tt_default_session_set or place the session id in the environment variable TT_SESSION before it calls the tt_open function. tt_open will check the environment variable TT_SESSION and join the indicated session (if it has a value).