SPICE之spicy主函数源码分析

int main(int argc, char *argv[])
{
    GError *error = NULL;
    GOptionContext *context;
    spice_connection *conn;
    gchar *conf_file, *conf;
    char *host = NULL, *port = NULL, *tls_port = NULL;


#if !GLIB_CHECK_VERSION(2,31,18)
    g_thread_init(NULL);
#endif
/*国际化*/
    bindtextdomain(GETTEXT_PACKAGE, SPICE_GTK_LOCALEDIR);
    bind_textdomain_codeset(GETTEXT_PACKAGE, "UTF-8");
    textdomain(GETTEXT_PACKAGE);


/*信号处理函数*/
    signal(SIGINT, signal_handler);
    signal(SIGTERM, signal_handler);
    segv_handler = signal(SIGSEGV, signal_handler);
    abrt_handler = signal(SIGABRT, signal_handler);
    fpe_handler = signal(SIGFPE, signal_handler);
    ill_handler = signal(SIGILL, signal_handler);

#ifndef WIN32
    signal(SIGHUP, signal_handler);
    bus_handler = signal(SIGBUS, signal_handler);
#endif


/*读取配置文件*/
    keyfile = g_key_file_new();


    int mode = S_IRWXU;
    conf_file = g_build_filename(g_get_user_config_dir(), "spicy", NULL);
    if (g_mkdir_with_parents(conf_file, mode) == -1)
        SPICE_DEBUG("failed to create config directory");
    g_free(conf_file);


    conf_file = g_build_filename(g_get_user_config_dir(), "spicy", "settings", NULL);
    if (!g_key_file_load_from_file(keyfile, conf_file,
                                   G_KEY_FILE_KEEP_COMMENTS|G_KEY_FILE_KEEP_TRANSLATIONS, &error)) {
        SPICE_DEBUG("Couldn't load configuration: %s", error->message);
        g_clear_error(&error);
    }

/*解析命令行传入的参数*/
    /* parse opts */
    gtk_init(&argc, &argv);
    context = g_option_context_new(_("- spice client test application"));
    g_option_context_set_summary(context, _("Gtk+ test client to connect to Spice servers."));
    g_option_context_set_description(context, _("Report bugs to " PACKAGE_BUGREPORT "."));
    g_option_context_add_group(context, spice_get_option_group());
    g_option_context_set_main_group(context, spice_cmdline_get_option_group());
    g_option_context_add_main_entries(context, cmd_entries, NULL);
    g_option_context_add_group(context, gtk_get_option_group(TRUE));
    if (!g_option_context_parse (context, &argc, &argv, &error)) {
        g_print(_("option parsing failed: %s\n"), error->message);
        exit(1);
    }
    g_option_context_free(context);


    if (version) {
        g_print("spicy " PACKAGE_VERSION "\n");
        exit(0);
    }




    g_type_init();
    mainloop = g_main_loop_new(NULL, false);


/*设置conn的通道默认回调函数，设置内部默认参数，读取命令行参数*/
    conn = connection_new();
    spice_set_session_option(conn->session);
    spice_cmdline_session_setup(conn->session);


    g_object_get(conn->session,
                 "host", &host,
                 "port", &port,
                 "tls-port", &tls_port,
                 NULL);
    /* If user doesn't provide hostname and port, show the dialog window
       instead of connecting to server automatically */
    if (host == NULL || (port == NULL && tls_port == NULL)) {
        int ret = connect_dialog(conn->session);
        if (ret != 0) {
            exit(0);
        }
    }
    g_free(host);
    g_free(port);
    g_free(tls_port);


    watch_stdin();


/*创建主通道，激活channel_new（）*/
    connection_connect(conn);
    if (connections > 0)
        g_main_loop_run(mainloop);
    g_main_loop_unref(mainloop);


    if ((conf = g_key_file_to_data(keyfile, NULL, &error)) == NULL ||
        !g_file_set_contents(conf_file, conf, -1, &error)) {
        SPICE_DEBUG("Couldn't save configuration: %s", error->message);
        g_error_free(error);
        error = NULL;
    }


    g_free(conf_file);
    g_free(conf);
    g_key_file_free(keyfile);


    g_free(spicy_title);


    setup_terminal(true);
    return 0;
}