Server.connected(attachingTo:_:)

The server handed to body is this server: the same calls, the same return types, the same errors. Only how the work reaches tmux changes.

A connection is a client, and tmux has no client that is attached to nothing — a control client with no target runs tmux's default command and creates a session. So the connection attaches to session, and that is visible in what the server reports about itself: that session reads as attached, and Server/clients() includes the connection. Nothing else differs.

The connection is handed over too, because it can do one thing a process cannot: report what changed without being asked. That capability exists only here, and so does the value carrying it — there is no way to write a %output reader against a server that has no connection.

The handed-out values do not keep the connection alive. Do not return or store them; calls made after body ends fail because the process has already been reaped.

• Parameters:
  • session: the session to attach to, which must already exist.
  • body: the work to run, given this server and the connection carrying it.
• Throws: TmuxError/connectionClosed if the connection ends before body, including when body detaches its own client.