/* 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);
}
/* 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. */
}
/* 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;
}
}
}