C++ register_signal函数代码示例

void start_plugin()
{
    print_debug("%s : start_plugin\n", GGadu_PLUGIN_NAME);
    register_signal(update_handler, "update config");
    register_signal(update_handler, "get current version");

    print_debug("%s : create menu\n", GGadu_PLUGIN_NAME);
    menu_updatemenu = update_menu();
    signal_emit(GGadu_PLUGIN_NAME, "gui register menu", menu_updatemenu, "main-gui");

    if (timer != -1)
        g_source_remove(timer);

    /* initialize timers */
    if ((gint) ggadu_config_var_get(update_handler, "check_automatically"))
    {
        timer = g_timeout_add(update_get_interval(), update_check, NULL);
        print_debug("%s : Timer ID set to %d\n", GGadu_PLUGIN_NAME, timer);
    }
    else
    {
        print_debug("%s : Resetting timer!\n", GGadu_PLUGIN_NAME);
        timer = -1;
    }

    if ((gint) ggadu_config_var_get(update_handler, "check_on_startup"))
        /* wait a while before looking for updates */
        g_timeout_add(3000, update_check_on_startup, NULL);
}

void signals_init()
{
	register_signal(SIGUSR1, sigusr1);
	register_signal(SIGUSR2, sigusr2);
	register_signal(SIGALRM, sigalarm);
	register_signal(SIGHUP, sighup);
}

/* PLUGIN INITIALISATION */
GGaduPlugin *initialize_plugin(gpointer conf_ptr)
{
	gchar *this_configdir;

	print_debug("%s : initialize\n", GGadu_PLUGIN_NAME);

	GGadu_PLUGIN_ACTIVATE(conf_ptr); /* THIS IS IMPORTANT HERE */
	handler = (GGaduPlugin *) register_plugin(GGadu_PLUGIN_NAME, _("External player sound driver"));

	SOUND_PLAY_FILE_SIG = register_signal(handler, "sound play file");
	UPDATE_CONFIG_SIG = register_signal(handler, "update config");

	if (g_getenv("HOME_ETC"))
		this_configdir = g_build_filename(g_getenv("HOME_ETC"), "gg2", NULL);
	else
		this_configdir = g_build_filename(g_get_home_dir(), ".gg2", NULL);

	ggadu_config_set_filename((GGaduPlugin *) handler, g_build_filename(this_configdir, "my-plugin", NULL));
	ggadu_config_var_add(handler, "player", VAR_STR);

	if (!ggadu_config_read(handler))
		g_warning(_("Unable to read configuration file for plugin %s"), "");

	register_signal_receiver((GGaduPlugin *) handler, (signal_func_ptr) my_signal_receive);

	g_free(this_configdir);
	return handler;
}

void
read_incoming_tun (struct context *c)
{
  /*
   * Setup for read() call on TUN/TAP device.
   */
  /*ASSERT (!c->c2.to_link.len);*/

  perf_push (PERF_READ_IN_TUN);

  c->c2.buf = c->c2.buffers->read_tun_buf;
#ifdef TUN_PASS_BUFFER
  read_tun_buffered (c->c1.tuntap, &c->c2.buf, MAX_RW_SIZE_TUN (&c->c2.frame));
#else
  ASSERT (buf_init (&c->c2.buf, FRAME_HEADROOM (&c->c2.frame)));
  ASSERT (buf_safe (&c->c2.buf, MAX_RW_SIZE_TUN (&c->c2.frame)));
  c->c2.buf.len = read_tun (c->c1.tuntap, BPTR (&c->c2.buf), MAX_RW_SIZE_TUN (&c->c2.frame));
#endif

#ifdef PACKET_TRUNCATION_CHECK
  ipv4_packet_size_verify (BPTR (&c->c2.buf),
			   BLEN (&c->c2.buf),
			   TUNNEL_TYPE (c->c1.tuntap),
			   "READ_TUN",
			   &c->c2.n_trunc_tun_read);
#endif

  /* Was TUN/TAP interface stopped? */
  if (tuntap_stop (c->c2.buf.len))
    {
      register_signal (c, SIGTERM, "tun-stop");
      msg (M_INFO, "TUN/TAP interface has been stopped, exiting");
      perf_pop ();
      return;		  
    }

  /* Was TUN/TAP I/O operation aborted? */
  if (tuntap_abort(c->c2.buf.len))
  {
     register_signal(c, SIGHUP, "tun-abort");
     c->persist.restart_sleep_seconds = 10;
     msg(M_INFO, "TUN/TAP I/O operation aborted, restarting");
     perf_pop();
     return;
  }

  /* Check the status return from read() */
  check_status (c->c2.buf.len, "read from TUN/TAP", NULL, c->c1.tuntap);

  perf_pop ();
}

int main (int argc, char *argv)
{
	register_signal(SIGUSR1);
	register_signal(SIGUSR2);

	/* Busy wait for the child to send a signal. */
	while (!usr_interrupt){
		sleep(100000);
	}

	/* Now continue execution. */
	puts ("That's all, folks!");

	return 0;
}

void
check_add_routes_dowork (struct context *c)
{
  if (test_routes (c->c1.route_list, c->c1.tuntap))
    {
      check_add_routes_action (c, false);
    }
  else if (event_timeout_trigger (&c->c2.route_wakeup_expire, &c->c2.timeval, ETT_DEFAULT))
    {
      check_add_routes_action (c, true);
    }
  else
    {
      msg (D_ROUTE, "Route: Waiting for TUN/TAP interface to come up...");
      if (c->c1.tuntap)
	{
	  if (!tun_standby (c->c1.tuntap))
	    {
	      register_signal (c, SIGHUP, "ip-fail");
	      c->persist.restart_sleep_seconds = 10;
#ifdef WIN32
	      show_routes (M_INFO|M_NOPREFIX);
	      show_adapters (M_INFO|M_NOPREFIX);
#endif
	    }
	}
      update_time ();
      if (c->c2.route_wakeup.n != 1)
	event_timeout_init (&c->c2.route_wakeup, 1, now);
      event_timeout_reset (&c->c2.ping_rec_interval);
    }
}

void
check_tls_dowork (struct context *c)
{
  interval_t wakeup = BIG_TIMEOUT;

  if (interval_test (&c->c2.tmp_int))
    {
      const int tmp_status = tls_multi_process
	(c->c2.tls_multi, &c->c2.to_link, &c->c2.to_link_addr,
	 get_link_socket_info (c), &wakeup);
      if (tmp_status == TLSMP_ACTIVE)
	{
	  update_time ();
	  interval_action (&c->c2.tmp_int);
	}
      else if (tmp_status == TLSMP_KILL)
	{
	  register_signal (c, SIGTERM, "auth-control-exit");
	}

      interval_future_trigger (&c->c2.tmp_int, wakeup);
    }

  interval_schedule_wakeup (&c->c2.tmp_int, &wakeup);

  if (wakeup)
    context_reschedule_sec (c, wakeup);
}

int main(int argc, char *argv[])
{
    int fd = 0;
    struct aiocb aiocb = {0};

    if (argc != 2)
    {
        fprintf(stderr, "Usage: ./a.out filename1 filename2 ...\n");
        return EXIT_FAILURE;
    }

    register_signal(SIGIO);

    fd = open(argv[1], O_RDONLY);
    if (fd < 0)
    {
        fprintf(stderr, "open failure\n");
        return EXIT_FAILURE;
    }

    aiocb.aio_fildes = fd;
    aiocb.aio_buf = (volatile void *)malloc(BUFSIZ+1);
    aiocb.aio_nbytes = BUFSIZ;
    aiocb.aio_sigevent.sigev_notify = SIGEV_SIGNAL;
    aiocb.aio_sigevent.sigev_signo = SIGIO;
    aiocb.aio_sigevent.sigev_value.sival_ptr = &aiocb;

    memset((void *)aiocb.aio_buf, 0, BUFSIZ+1);
    aiocb.aio_offset = offset;

    aio_read(&aiocb);

    sleep(1);
    return EXIT_SUCCESS;
}

/**
 * If a restart signal is received during exit-notification, reset the
 * signal and return true. If its a soft restart signal from the event loop
 * which implies the loop cannot continue, remap to SIGTERM to exit promptly.
 */
static bool
ignore_restart_signals(struct context *c)
{
    bool ret = false;
#ifdef ENABLE_OCC
    if ( (c->sig->signal_received == SIGUSR1 || c->sig->signal_received == SIGHUP)
         && event_timeout_defined(&c->c2.explicit_exit_notification_interval) )
    {
        if (c->sig->source == SIG_SOURCE_HARD)
        {
            msg(M_INFO, "Ignoring %s received during exit notification",
                signal_name(c->sig->signal_received, true));
            signal_reset(c->sig);
            ret = true;
        }
        else
        {
            msg(M_INFO, "Converting soft %s received during exit notification to SIGTERM",
                signal_name(c->sig->signal_received, true));
            register_signal(c, SIGTERM, "exit-with-notification");
            ret = false;
        }
    }
#endif
    return ret;
}

void
incoming_push_message(struct context *c, const struct buffer *buffer)
{
    struct gc_arena gc = gc_new();
    unsigned int option_types_found = 0;
    int status;

    msg(D_PUSH, "PUSH: Received control message: '%s'", sanitize_control_message(BSTR(buffer), &gc));

    status = process_incoming_push_msg(c,
                                       buffer,
                                       c->options.pull,
                                       pull_permission_mask(c),
                                       &option_types_found);

    if (status == PUSH_MSG_ERROR)
    {
        msg(D_PUSH_ERRORS, "WARNING: Received bad push/pull message: %s", sanitize_control_message(BSTR(buffer), &gc));
    }
    else if (status == PUSH_MSG_REPLY || status == PUSH_MSG_CONTINUATION)
    {
        c->options.push_option_types_found |= option_types_found;

        /* delay bringing tun/tap up until --push parms received from remote */
        if (status == PUSH_MSG_REPLY)
        {
            if (!do_up(c, true, c->options.push_option_types_found))
            {
                msg(D_PUSH_ERRORS, "Failed to open tun/tap interface");
                goto error;
            }
        }
        event_timeout_clear(&c->c2.push_request_interval);
    }
    else if (status == PUSH_MSG_REQUEST)
    {
        if (c->options.mode == MODE_SERVER)
        {
            struct tls_session *session = &c->c2.tls_multi->session[TM_ACTIVE];
            /* Do not regenerate keys if client send a second push request */
            if (!session->key[KS_PRIMARY].crypto_options.key_ctx_bi.initialized
                && !tls_session_update_crypto_params(session, &c->options,
                                                     &c->c2.frame))
            {
                msg(D_TLS_ERRORS, "TLS Error: initializing data channel failed");
                goto error;
            }
        }
    }

    goto cleanup;
error:
    register_signal(c, SIGUSR1, "process-push-msg-failed");
cleanup:
    gc_free(&gc);
}

void
check_server_poll_timeout_dowork (struct context *c)
{
  event_timeout_reset (&c->c2.server_poll_interval);
  if (!tls_initial_packet_received (c->c2.tls_multi))
    {
      msg (M_INFO, "Server poll timeout, restarting");
      register_signal (c, SIGUSR1, "server_poll");
      c->persist.restart_sleep_seconds = -1;
    }
}

/* PLUGIN INITIALISATION */
GGaduPlugin *initialize_plugin(gpointer conf_ptr)
{
	GGadu_PLUGIN_ACTIVATE(conf_ptr);
	ignore_handler = (GGaduPlugin *) register_plugin(GGadu_PLUGIN_NAME, _("Ignore option support"));

	IGNORE_ADD_CONTACT_SIG = register_signal(ignore_handler, "ignore add contact");
	IGNORE_REMOVE_CONTACT_SIG = register_signal(ignore_handler, "ignore remove contact");
	IGNORE_CHECK_CONTACT_SIG = register_signal(ignore_handler, "ignore check contact");
	IGNORE_DIALOG_ADD_ID_SIG = register_signal(ignore_handler, "ignore dialog add id");
	IGNORE_DIALOG_REMOVE_ID_SIG = register_signal(ignore_handler, "ignore dialog remove id");

	ggadu_config_set_filename(ignore_handler, g_build_filename(config->configdir, "ignore-main", NULL));
	ggadu_config_var_add(ignore_handler, "list", VAR_STR);

	if (!ggadu_config_read(ignore_handler))
		g_warning(_("Unable to read configuration file for plugin %s"), "");

	register_signal_receiver(ignore_handler, (signal_func_ptr) my_signal_receive);

	return ignore_handler;
}

/* PLUGIN INITIALISATION */
GGaduPlugin *initialize_plugin(gpointer conf_ptr)
{
	print_debug("%s : initialize\n", GGadu_PLUGIN_NAME);

	GGadu_PLUGIN_ACTIVATE(conf_ptr);
	handler = (GGaduPlugin *) register_plugin(GGadu_PLUGIN_NAME, _("External history viewer"));

	HISTORY_SHOW_FILE_SIG = register_signal(handler, "history show file");
	UPDATE_CONFIG_SIG = register_signal(handler, "update config");

	ggadu_config_set_filename((GGaduPlugin *) handler, g_build_filename(config->configdir, "history-external", NULL));

	ggadu_config_var_add_with_default(handler, "viewer", VAR_STR, g_build_filename(BINDIR, "gghist %s", NULL));

	if (!ggadu_config_read(handler))
		g_warning(_("Unable to read configuration file for plugin %s"), "");

	register_signal_receiver((GGaduPlugin *) handler, (signal_func_ptr) my_signal_receive);

	return handler;
}

void start_plugin()
{
	int e;
	if ((e = regcomp(&regex, "^([^ ]+)( ([^ ]+)( (.*))?)?$", REG_EXTENDED)) != 0)
	{
		char *err = get_regerror(e, &regex);
		print_debug("%s: regcomp() failed: %s\n", GGadu_PLUGIN_NAME, err);
		print_debug("%s: plugin disabled\n", GGadu_PLUGIN_NAME);
		free(err);
		return;
	}

	if (remote_init() == -1)
		return;

	register_signal(handler, "update config");

	/* perfidnie podpinamy siê pod sygna³ dockleta */
	register_signal(handler, "docklet set icon");
	register_signal(handler, "docklet set default icon");
	menu_remotemenu = remote_menu();
	signal_emit(GGadu_PLUGIN_NAME, "gui register menu", menu_remotemenu, "main-gui");
}

GGaduPlugin *initialize_plugin(gpointer conf_ptr)
{
    print_debug("%s : initialize", GGadu_PLUGIN_NAME);

    GGadu_PLUGIN_ACTIVATE(conf_ptr);

    handler = (GGaduPlugin *) register_plugin(GGadu_PLUGIN_NAME, _("ESD sound driver"));

    SOUND_PLAY_FILE_SIG = register_signal(handler, "sound play file");

    register_signal_receiver((GGaduPlugin *) handler, (signal_func_ptr) my_signal_receive);

    return handler;
}