digraph Network {
#    size="20,20";
    fontname=arial;
    fontsize=12; 
    rankdir=TB;

    node [fontname=arial, fontsize=12, style=filled, color=orange ];
    edge [fontname=arial, weight=10, color=blue, fontsize=12, decorate=0 ];


    node [ shape=ellipse ];

    daemon_parent   [ label="signal: daemon_parent" ];
    daemon_child    [ label="signal: daemon_child" ];
    daemon_accept   [ label="signal: daemon_accept" ];
    daemon_shutdown [ label="signal: daemon_shutdown" ];
    shutdown        [ label="event: shutdown" ];

    node [ shape=polygon, sides=4, skew=.4  ];

    prefork      [ label="Preforking Daemon" ];
    grand_parent [ label="Grand-parent process" ];
    parent       [ label="Parent process" ];
    child        [ label="Child process" ];


    node [ shape=circle ];
    
    w [ label="w"];
    f [ label="f"];
    F [ label="F"];
    r [ label="r"];
    e [ label="e"];
    l [ label="l"];

    node [ shape=box ];

    

    prefork -> startup;

    startup -> grand_parent [ label="detach" ];
    grand_parent -> parent;

    parent -> F [ label="startup" ];

    startup [ label="Startup\n(->pause_accept)" ];

    parent -> daemon_parent ;

    parent -> check_scoreboard -> parent ;
    check_scoreboard -> F [ label="Need more children" ];


    F -> fork -> f -> child -> daemon_child -> get_ready;
    get_ready -> w [ label="update_status: wait"];

    w -> daemon_accept -> ready -> request; 
    ready [ label="ready\n(->resume_accept)" ];
    request -> r [ label="update_status: req"];
    r -> do_req;
    do_req -> done; // [ label="update_status: done"];

    r -> l [ label="update_status: long"];

    request -> l [ label="update_status: long"]; 
    l -> long_req -> done;
    done -> w [ label="update_status: done"];

    w -> requests -> shutdown -> e;
                     shutdown -> daemon_shutdown;

    requests [ label="> N requests" ];

    long_req [ label="Handle long request" ];
    do_req   [ label="Handle request" ];

}