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tmate Documentation

repository·master·Indexed 27 days ago

https://github.com/tmate-io/tmate

tmate is a fork of tmux that provides instant terminal pairing capabilities for collaborative work. It includes a client-server architecture for sharing terminal sessions, featuring functions for server initialization, Unix domain socket management, and client connection handling.

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What's inside tmate

  2. Overview of tmux

    master
    tmux is a terminal multiplexer that allows multiple terminals (or windows) to be accessed and controlled from a single terminal. It serves as a modern, BSD-licensed alternative to programs like GNU screen. It is compatible with OpenBSD, FreeBSD, NetBSD, Linux, OS X, and Solaris.

  4. Build tmux from version control

    master

    To build the latest version of tmux from the Git repository, clone the source, run the autogen script, and then configure and make:

    git clone https://github.com/tmux/tmux.git
cd tmux
sh autogen.sh
./configure && make

  6. Connect a client to the tmate server

    master
    Use client_connect to establish a connection to a tmate server via a Unix domain socket. If start_server is set to non-zero, the client will attempt to acquire a lock and start the server if it is not already running.

  7. Create the server Unix domain socket

    master

    The server_create_socket function initializes a Unix domain socket (AF_UNIX) at the path defined by socket_path. It unlinks any existing socket at that path, binds the socket, listens for connections (up to 16), and sets the socket to non-blocking mode.

    int
server_create_socket(void);

  8. Handle server socket accept events

    master
    The server_accept function is a callback for the server's event loop. When a new connection is detected on the server socket, it accepts the connection and calls server_client_create to establish a new client session. It also handles backoff logic if the system runs out of file descriptors (ENFILE or EMFILE).

  10. Get a server creation lock

    master

    The client_get_lock function attempts to acquire an exclusive lock on a specified lockfile. This is used to coordinate server startup between multiple clients.

    Return values:

    • A valid file descriptor if the lock is successfully acquired.
    • -1 on failure to continue and start the server anyway.
    • -2 if the lock is already held by another process (indicating a retry is needed).

  11. Start the tmate server

    master
    Use server_start to initialize and run the tmate server process. This function sets up the event loop, initializes internal data structures (windows, panes, sessions, etc.), creates the Unix domain socket, and starts the server loop. If tmate_foreground is true, it runs the initial client command.

  12. Identify client environment to the server

    master
    The client_send_identify function transmits client metadata to the server, including terminal type (TERM), TTY name, current working directory, standard input file descriptor, process ID, and environment variables.