Ejemplo n.º 1
0
/* Execute ENTRY from the menu MENU, falling back to entries specified
   in the environment variable "fallback" if it fails.  CALLBACK is a
   pointer to a struct of function pointers which are used to allow the
   caller provide feedback to the user.  */
static void
grub_menu_execute_with_fallback (grub_menu_t menu,
				 grub_menu_entry_t entry,
				 int autobooted,
				 grub_menu_execute_callback_t callback,
				 void *callback_data)
{
  int fallback_entry;

  callback->notify_booting (entry, callback_data);

  grub_menu_execute_entry (entry, 1);

  /* Deal with fallback entries.  */
  while ((fallback_entry = get_and_remove_first_entry_number ("fallback"))
	 >= 0)
    {
      grub_print_error ();
      grub_errno = GRUB_ERR_NONE;

      entry = grub_menu_get_entry (menu, fallback_entry);
      callback->notify_fallback (entry, callback_data);
      grub_menu_execute_entry (entry, 1);
      /* If the function call to execute the entry returns at all, then this is
	 taken to indicate a boot failure.  For menu entries that do something
	 other than actually boot an operating system, this could assume
	 incorrectly that something failed.  */
    }

  if (!autobooted)
    callback->notify_failure (callback_data);
}
Ejemplo n.º 2
0
/* Show the menu and handle menu entry selection.  Returns the menu entry
   index that should be executed or -1 if no entry should be executed (e.g.,
   Esc pressed to exit a sub-menu or switching menu viewers).
   If the return value is not -1, then *AUTO_BOOT is nonzero iff the menu
   entry to be executed is a result of an automatic default selection because
   of the timeout.  */
static int
run_menu (grub_menu_t menu, int nested, int *auto_boot)
{
  grub_uint64_t saved_time;
  int default_entry, current_entry;
  int timeout;

  default_entry = get_entry_number (menu, "default");

  /* If DEFAULT_ENTRY is not within the menu entries, fall back to
     the first entry.  */
  if (default_entry < 0 || default_entry >= menu->size)
    default_entry = 0;

  /* If timeout is 0, drawing is pointless (and ugly).  */
  if (grub_menu_get_timeout () == 0)
    {
      *auto_boot = 1;
      return default_entry;
    }

  current_entry = default_entry;

  /* Initialize the time.  */
  saved_time = grub_get_time_ms ();

 refresh:
  menu_init (current_entry, menu, nested);

  timeout = grub_menu_get_timeout ();

  if (timeout > 0)
    menu_print_timeout (timeout);
  else
    clear_timeout ();

  while (1)
    {
      int c;
      timeout = grub_menu_get_timeout ();

      if (grub_normal_exit_level)
	return -1;

      if (timeout > 0)
	{
	  grub_uint64_t current_time;

	  current_time = grub_get_time_ms ();
	  if (current_time - saved_time >= 1000)
	    {
	      timeout--;
	      grub_menu_set_timeout (timeout);
	      saved_time = current_time;
	      menu_print_timeout (timeout);
	    }
	}

      if (timeout == 0)
	{
	  grub_env_unset ("timeout");
          *auto_boot = 1;
	  menu_fini ();
	  return default_entry;
	}

      c = grub_getkey_noblock ();

      if (c != GRUB_TERM_NO_KEY)
	{
	  if (timeout >= 0)
	    {
	      grub_env_unset ("timeout");
	      grub_env_unset ("fallback");
	      clear_timeout ();
	    }

	  switch (c)
	    {
	    case GRUB_TERM_KEY_HOME:
	    case GRUB_TERM_CTRL | 'a':
	      current_entry = 0;
	      menu_set_chosen_entry (current_entry);
	      break;

	    case GRUB_TERM_KEY_END:
	    case GRUB_TERM_CTRL | 'e':
	      current_entry = menu->size - 1;
	      menu_set_chosen_entry (current_entry);
	      break;

	    case GRUB_TERM_KEY_UP:
	    case GRUB_TERM_CTRL | 'p':
	    case '^':
	      if (current_entry > 0)
		current_entry--;
	      menu_set_chosen_entry (current_entry);
	      break;

	    case GRUB_TERM_CTRL | 'n':
	    case GRUB_TERM_KEY_DOWN:
	    case 'v':
	      if (current_entry < menu->size - 1)
		current_entry++;
	      menu_set_chosen_entry (current_entry);
	      break;

	    case GRUB_TERM_CTRL | 'g':
	    case GRUB_TERM_KEY_PPAGE:
	      if (current_entry < GRUB_MENU_PAGE_SIZE)
		current_entry = 0;
	      else
		current_entry -= GRUB_MENU_PAGE_SIZE;
	      menu_set_chosen_entry (current_entry);
	      break;

	    case GRUB_TERM_CTRL | 'c':
	    case GRUB_TERM_KEY_NPAGE:
	      if (current_entry + GRUB_MENU_PAGE_SIZE < menu->size)
		current_entry += GRUB_MENU_PAGE_SIZE;
	      else
		current_entry = menu->size - 1;
	      menu_set_chosen_entry (current_entry);
	      break;

	    case '\n':
	    case '\r':
	    case GRUB_TERM_KEY_RIGHT:
	    case GRUB_TERM_CTRL | 'f':
	      menu_fini ();
              *auto_boot = 0;
	      return current_entry;

	    case '\e':
	      if (nested)
		{
		  menu_fini ();
		  return -1;
		}
	      break;

	    case 'c':
	      menu_fini ();
	      grub_cmdline_run (1);
	      goto refresh;

	    case 'e':
	      menu_fini ();
		{
		  grub_menu_entry_t e = grub_menu_get_entry (menu, current_entry);
		  if (e)
		    grub_menu_entry_run (e);
		}
	      goto refresh;

	    default:
	      {
		grub_menu_entry_t entry;
		int i;
		for (i = 0, entry = menu->entry_list; i < menu->size;
		     i++, entry = entry->next)
		  if (entry->hotkey == c)
		    {
		      menu_fini ();
		      *auto_boot = 0;
		      return i;
		    }
	      }
	      break;
	    }
	}
    }

  /* Never reach here.  */
}
Ejemplo n.º 3
0
/* Show the menu and handle menu entry selection.  Returns the menu entry
   index that should be executed or -1 if no entry should be executed (e.g.,
   Esc pressed to exit a sub-menu or switching menu viewers).
   If the return value is not -1, then *AUTO_BOOT is nonzero iff the menu
   entry to be executed is a result of an automatic default selection because
   of the timeout.  */
static int
run_menu (grub_menu_t menu, int nested, int *auto_boot)
{
  grub_uint64_t saved_time;
  int default_entry, current_entry;
  int timeout;

  default_entry = get_entry_number (menu, "default");

  /* If DEFAULT_ENTRY is not within the menu entries, fall back to
     the first entry.  */
  if (default_entry < 0 || default_entry >= menu->size)
    default_entry = 0;

  /* If timeout is 0, drawing is pointless (and ugly).  */
  if (grub_menu_get_timeout () == 0)
    {
      *auto_boot = 1;
      return default_entry;
    }

  current_entry = default_entry;

  /* Initialize the time.  */
  saved_time = grub_get_time_ms ();

 refresh:
  menu_init (current_entry, menu, nested);

  timeout = grub_menu_get_timeout ();

  if (timeout > 0)
    menu_print_timeout (timeout);
  else
    clear_timeout ();

  while (1)
    {
      int c;
      timeout = grub_menu_get_timeout ();

      if (grub_normal_exit_level)
	return -1;

      if (timeout > 0)
	{
	  grub_uint64_t current_time;

	  current_time = grub_get_time_ms ();
	  if (current_time - saved_time >= 1000)
	    {
	      timeout--;
	      grub_menu_set_timeout (timeout);
	      saved_time = current_time;
	      menu_print_timeout (timeout);
	    }
	}

      if (timeout == 0)
	{
	  grub_env_unset ("timeout");
          *auto_boot = 1;
	  menu_fini ();
	  return default_entry;
	}

      if (grub_checkkey () >= 0 || timeout < 0)
	{
	  c = GRUB_TERM_ASCII_CHAR (grub_getkey ());

	  if (timeout >= 0)
	    {
	      grub_env_unset ("timeout");
	      grub_env_unset ("fallback");
	      clear_timeout ();
	    }

	  switch (c)
	    {
	    case GRUB_TERM_HOME:
	      current_entry = 0;
	      menu_set_chosen_entry (current_entry);
	      break;

	    case GRUB_TERM_END:
	      current_entry = menu->size - 1;
	      menu_set_chosen_entry (current_entry);
	      break;

	    case GRUB_TERM_UP:
	    case '^':
	      if (current_entry > 0)
		current_entry--;
	      menu_set_chosen_entry (current_entry);
	      break;

	    case GRUB_TERM_DOWN:
	    case 'v':
	      if (current_entry < menu->size - 1)
		current_entry++;
	      menu_set_chosen_entry (current_entry);
	      break;

	    case GRUB_TERM_PPAGE:
	      if (current_entry < GRUB_MENU_PAGE_SIZE)
		current_entry = 0;
	      else
		current_entry -= GRUB_MENU_PAGE_SIZE;
	      menu_set_chosen_entry (current_entry);
	      break;

	    case GRUB_TERM_NPAGE:
	      if (current_entry + GRUB_MENU_PAGE_SIZE < menu->size)
		current_entry += GRUB_MENU_PAGE_SIZE;
	      else
		current_entry = menu->size - 1;
	      menu_set_chosen_entry (current_entry);
	      break;

	    case '\n':
	    case '\r':
	    case 6:
	      menu_fini ();
              *auto_boot = 0;
	      return current_entry;

	    case '\e':
	      if (nested)
		{
		  menu_fini ();
		  return -1;
		}
	      break;

	    case 'c':
	      menu_fini ();
	      grub_cmdline_run (1);
	      goto refresh;

	    case 'e':
	      menu_fini ();
		{
		  grub_menu_entry_t e = grub_menu_get_entry (menu, current_entry);
		  if (e)
		    grub_menu_entry_run (e);
		}
	      goto refresh;

	    default:
	      break;
	    }
	}
    }