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-rw-r--r--grub-core/normal/menu.c912
1 files changed, 912 insertions, 0 deletions
diff --git a/grub-core/normal/menu.c b/grub-core/normal/menu.c
new file mode 100644
index 0000000..8397886
--- /dev/null
+++ b/grub-core/normal/menu.c
@@ -0,0 +1,912 @@
+/* menu.c - General supporting functionality for menus. */
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2003,2004,2005,2006,2007,2008,2009,2010 Free Software Foundation, Inc.
+ *
+ * GRUB is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GRUB is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/normal.h>
+#include <grub/misc.h>
+#include <grub/loader.h>
+#include <grub/mm.h>
+#include <grub/time.h>
+#include <grub/env.h>
+#include <grub/menu_viewer.h>
+#include <grub/command.h>
+#include <grub/parser.h>
+#include <grub/auth.h>
+#include <grub/i18n.h>
+#include <grub/term.h>
+#include <grub/script_sh.h>
+#include <grub/gfxterm.h>
+#include <grub/dl.h>
+
+/* Time to delay after displaying an error message about a default/fallback
+ entry failing to boot. */
+#define DEFAULT_ENTRY_ERROR_DELAY_MS 2500
+
+grub_err_t (*grub_gfxmenu_try_hook) (int entry, grub_menu_t menu,
+ int nested) = NULL;
+
+enum timeout_style {
+ TIMEOUT_STYLE_MENU,
+ TIMEOUT_STYLE_COUNTDOWN,
+ TIMEOUT_STYLE_HIDDEN
+};
+
+struct timeout_style_name {
+ const char *name;
+ enum timeout_style style;
+} timeout_style_names[] = {
+ {"menu", TIMEOUT_STYLE_MENU},
+ {"countdown", TIMEOUT_STYLE_COUNTDOWN},
+ {"hidden", TIMEOUT_STYLE_HIDDEN},
+ {NULL, 0}
+};
+
+/* Wait until the user pushes any key so that the user
+ can see what happened. */
+void
+grub_wait_after_message (void)
+{
+ grub_uint64_t endtime;
+ grub_xputs ("\n");
+ grub_printf_ (N_("Press any key to continue..."));
+ grub_refresh ();
+
+ endtime = grub_get_time_ms () + 10000;
+
+ while (grub_get_time_ms () < endtime
+ && grub_getkey_noblock () == GRUB_TERM_NO_KEY);
+
+ grub_xputs ("\n");
+}
+
+/* Get a menu entry by its index in the entry list. */
+grub_menu_entry_t
+grub_menu_get_entry (grub_menu_t menu, int no)
+{
+ grub_menu_entry_t e;
+
+ for (e = menu->entry_list; e && no > 0; e = e->next, no--)
+ ;
+
+ return e;
+}
+
+/* Get the index of a menu entry associated with a given hotkey, or -1. */
+static int
+get_entry_index_by_hotkey (grub_menu_t menu, int hotkey)
+{
+ grub_menu_entry_t entry;
+ int i;
+
+ for (i = 0, entry = menu->entry_list; i < menu->size;
+ i++, entry = entry->next)
+ if (entry->hotkey == hotkey)
+ return i;
+
+ return -1;
+}
+
+/* Return the timeout style. If the variable "timeout_style" is not set or
+ invalid, default to TIMEOUT_STYLE_MENU. */
+static enum timeout_style
+get_timeout_style (void)
+{
+ const char *val;
+ struct timeout_style_name *style_name;
+
+ val = grub_env_get ("timeout_style");
+ if (!val)
+ return TIMEOUT_STYLE_MENU;
+
+ for (style_name = timeout_style_names; style_name->name; style_name++)
+ if (grub_strcmp (style_name->name, val) == 0)
+ return style_name->style;
+
+ return TIMEOUT_STYLE_MENU;
+}
+
+/* Return the current timeout. If the variable "timeout" is not set or
+ invalid, return -1. */
+int
+grub_menu_get_timeout (void)
+{
+ const char *val;
+ int timeout;
+
+ val = grub_env_get ("timeout");
+ if (! val)
+ return -1;
+
+ grub_error_push ();
+
+ timeout = (int) grub_strtoul (val, 0, 0);
+
+ /* If the value is invalid, unset the variable. */
+ if (grub_errno != GRUB_ERR_NONE)
+ {
+ grub_env_unset ("timeout");
+ grub_errno = GRUB_ERR_NONE;
+ timeout = -1;
+ }
+
+ grub_error_pop ();
+
+ return timeout;
+}
+
+/* Set current timeout in the variable "timeout". */
+void
+grub_menu_set_timeout (int timeout)
+{
+ /* Ignore TIMEOUT if it is zero, because it will be unset really soon. */
+ if (timeout > 0)
+ {
+ char buf[16];
+
+ grub_snprintf (buf, sizeof (buf), "%d", timeout);
+ grub_env_set ("timeout", buf);
+ }
+}
+
+/* Get the first entry number from the value of the environment variable NAME,
+ which is a space-separated list of non-negative integers. The entry number
+ which is returned is stripped from the value of NAME. If no entry number
+ can be found, -1 is returned. */
+static int
+get_and_remove_first_entry_number (const char *name)
+{
+ const char *val, *tail;
+ int entry;
+
+ val = grub_env_get (name);
+ if (! val)
+ return -1;
+
+ grub_error_push ();
+
+ entry = (int) grub_strtoul (val, &tail, 0);
+
+ if (grub_errno == GRUB_ERR_NONE)
+ {
+ /* Skip whitespace to find the next digit. */
+ while (*tail && grub_isspace (*tail))
+ tail++;
+ grub_env_set (name, tail);
+ }
+ else
+ {
+ grub_env_unset (name);
+ grub_errno = GRUB_ERR_NONE;
+ entry = -1;
+ }
+
+ grub_error_pop ();
+
+ return entry;
+}
+
+/* Run a menu entry. */
+static void
+grub_menu_execute_entry(grub_menu_entry_t entry, int auto_boot)
+{
+ grub_err_t err = GRUB_ERR_NONE;
+ int errs_before;
+ grub_menu_t menu = NULL;
+ char *optr, *buf, *oldchosen = NULL, *olddefault = NULL;
+ const char *ptr, *chosen, *def;
+ grub_size_t sz = 0;
+
+ if (entry->restricted)
+ err = grub_auth_check_authentication (entry->users);
+
+ if (err)
+ {
+ grub_print_error ();
+ grub_errno = GRUB_ERR_NONE;
+ return;
+ }
+
+ errs_before = grub_err_printed_errors;
+
+ chosen = grub_env_get ("chosen");
+ def = grub_env_get ("default");
+
+ if (entry->submenu)
+ {
+ grub_env_context_open ();
+ menu = grub_zalloc (sizeof (*menu));
+ if (! menu)
+ return;
+ grub_env_set_menu (menu);
+ if (auto_boot)
+ grub_env_set ("timeout", "0");
+ }
+
+ for (ptr = entry->id; *ptr; ptr++)
+ sz += (*ptr == '>') ? 2 : 1;
+ if (chosen)
+ {
+ oldchosen = grub_strdup (chosen);
+ if (!oldchosen)
+ grub_print_error ();
+ }
+ if (def)
+ {
+ olddefault = grub_strdup (def);
+ if (!olddefault)
+ grub_print_error ();
+ }
+ sz++;
+ if (chosen)
+ sz += grub_strlen (chosen);
+ sz++;
+ buf = grub_malloc (sz);
+ if (!buf)
+ grub_print_error ();
+ else
+ {
+ optr = buf;
+ if (chosen)
+ {
+ optr = grub_stpcpy (optr, chosen);
+ *optr++ = '>';
+ }
+ for (ptr = entry->id; *ptr; ptr++)
+ {
+ if (*ptr == '>')
+ *optr++ = '>';
+ *optr++ = *ptr;
+ }
+ *optr = 0;
+ grub_env_set ("chosen", buf);
+ grub_env_export ("chosen");
+ grub_free (buf);
+ }
+
+ for (ptr = def; ptr && *ptr; ptr++)
+ {
+ if (ptr[0] == '>' && ptr[1] == '>')
+ {
+ ptr++;
+ continue;
+ }
+ if (ptr[0] == '>')
+ break;
+ }
+
+ if (ptr && ptr[0] && ptr[1])
+ grub_env_set ("default", ptr + 1);
+ else
+ grub_env_unset ("default");
+
+ grub_script_execute_new_scope (entry->sourcecode, entry->argc, entry->args);
+
+ if (errs_before != grub_err_printed_errors)
+ grub_wait_after_message ();
+
+ errs_before = grub_err_printed_errors;
+
+ if (grub_errno == GRUB_ERR_NONE && grub_loader_is_loaded ())
+ /* Implicit execution of boot, only if something is loaded. */
+ grub_command_execute ("boot", 0, 0);
+
+ if (errs_before != grub_err_printed_errors)
+ grub_wait_after_message ();
+
+ if (entry->submenu)
+ {
+ if (menu && menu->size)
+ {
+ grub_show_menu (menu, 1, auto_boot);
+ grub_normal_free_menu (menu);
+ }
+ grub_env_context_close ();
+ }
+ if (oldchosen)
+ grub_env_set ("chosen", oldchosen);
+ else
+ grub_env_unset ("chosen");
+ if (olddefault)
+ grub_env_set ("default", olddefault);
+ else
+ grub_env_unset ("default");
+ grub_env_unset ("timeout");
+}
+
+/* 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);
+}
+
+static struct grub_menu_viewer *viewers;
+
+static void
+menu_set_chosen_entry (int entry)
+{
+ struct grub_menu_viewer *cur;
+ for (cur = viewers; cur; cur = cur->next)
+ cur->set_chosen_entry (entry, cur->data);
+}
+
+static void
+menu_print_timeout (int timeout)
+{
+ struct grub_menu_viewer *cur;
+ for (cur = viewers; cur; cur = cur->next)
+ cur->print_timeout (timeout, cur->data);
+}
+
+static void
+menu_fini (void)
+{
+ struct grub_menu_viewer *cur, *next;
+ for (cur = viewers; cur; cur = next)
+ {
+ next = cur->next;
+ cur->fini (cur->data);
+ grub_free (cur);
+ }
+ viewers = NULL;
+}
+
+static void
+menu_init (int entry, grub_menu_t menu, int nested)
+{
+ struct grub_term_output *term;
+ int gfxmenu = 0;
+
+ FOR_ACTIVE_TERM_OUTPUTS(term)
+ if (term->fullscreen)
+ {
+ if (grub_env_get ("theme"))
+ {
+ if (!grub_gfxmenu_try_hook)
+ {
+ grub_dl_load ("gfxmenu");
+ grub_print_error ();
+ }
+ if (grub_gfxmenu_try_hook)
+ {
+ grub_err_t err;
+ err = grub_gfxmenu_try_hook (entry, menu, nested);
+ if(!err)
+ {
+ gfxmenu = 1;
+ break;
+ }
+ }
+ else
+ grub_error (GRUB_ERR_BAD_MODULE,
+ N_("module `%s' isn't loaded"),
+ "gfxmenu");
+ grub_print_error ();
+ grub_wait_after_message ();
+ }
+ grub_errno = GRUB_ERR_NONE;
+ term->fullscreen ();
+ break;
+ }
+
+ FOR_ACTIVE_TERM_OUTPUTS(term)
+ {
+ grub_err_t err;
+
+ if (grub_strcmp (term->name, "gfxterm") == 0 && gfxmenu)
+ continue;
+
+ err = grub_menu_try_text (term, entry, menu, nested);
+ if(!err)
+ continue;
+ grub_print_error ();
+ grub_errno = GRUB_ERR_NONE;
+ }
+}
+
+static void
+clear_timeout (void)
+{
+ struct grub_menu_viewer *cur;
+ for (cur = viewers; cur; cur = cur->next)
+ cur->clear_timeout (cur->data);
+}
+
+void
+grub_menu_register_viewer (struct grub_menu_viewer *viewer)
+{
+ viewer->next = viewers;
+ viewers = viewer;
+}
+
+static int
+menuentry_eq (const char *id, const char *spec)
+{
+ const char *ptr1, *ptr2;
+ ptr1 = id;
+ ptr2 = spec;
+ while (1)
+ {
+ if (*ptr2 == '>' && ptr2[1] != '>' && *ptr1 == 0)
+ return 1;
+ if (*ptr2 == '>' && ptr2[1] != '>')
+ return 0;
+ if (*ptr2 == '>')
+ ptr2++;
+ if (*ptr1 != *ptr2)
+ return 0;
+ if (*ptr1 == 0)
+ return 1;
+ ptr1++;
+ ptr2++;
+ }
+}
+
+
+/* Get the entry number from the variable NAME. */
+static int
+get_entry_number (grub_menu_t menu, const char *name)
+{
+ const char *val;
+ int entry;
+
+ val = grub_env_get (name);
+ if (! val)
+ return -1;
+
+ grub_error_push ();
+
+ entry = (int) grub_strtoul (val, 0, 0);
+
+ if (grub_errno == GRUB_ERR_BAD_NUMBER)
+ {
+ /* See if the variable matches the title of a menu entry. */
+ grub_menu_entry_t e = menu->entry_list;
+ int i;
+
+ grub_errno = GRUB_ERR_NONE;
+
+ for (i = 0; e; i++)
+ {
+ if (menuentry_eq (e->title, val)
+ || menuentry_eq (e->id, val))
+ {
+ entry = i;
+ break;
+ }
+ e = e->next;
+ }
+
+ if (! e)
+ entry = -1;
+ }
+
+ if (grub_errno != GRUB_ERR_NONE)
+ {
+ grub_errno = GRUB_ERR_NONE;
+ entry = -1;
+ }
+
+ grub_error_pop ();
+
+ return entry;
+}
+
+/* Check whether a second has elapsed since the last tick. If so, adjust
+ the timer and return 1; otherwise, return 0. */
+static int
+has_second_elapsed (grub_uint64_t *saved_time)
+{
+ grub_uint64_t current_time;
+
+ current_time = grub_get_time_ms ();
+ if (current_time - *saved_time >= 1000)
+ {
+ *saved_time = current_time;
+ return 1;
+ }
+ else
+ return 0;
+}
+
+static void
+print_countdown (struct grub_term_coordinate *pos, int n)
+{
+ grub_term_restore_pos (pos);
+ /* NOTE: Do not remove the trailing space characters.
+ They are required to clear the line. */
+ grub_printf ("%d ", n);
+ grub_refresh ();
+}
+
+#define GRUB_MENU_PAGE_SIZE 10
+
+/* 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;
+ enum timeout_style timeout_style;
+
+ 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;
+
+ timeout = grub_menu_get_timeout ();
+ if (timeout < 0)
+ /* If there is no timeout, the "countdown" and "hidden" styles result in
+ the system doing nothing and providing no or very little indication
+ why. Technically this is what the user asked for, but it's not very
+ useful and likely to be a source of confusion, so we disallow this. */
+ grub_env_unset ("timeout_style");
+
+ timeout_style = get_timeout_style ();
+
+ if (timeout_style == TIMEOUT_STYLE_COUNTDOWN
+ || timeout_style == TIMEOUT_STYLE_HIDDEN)
+ {
+ static struct grub_term_coordinate *pos;
+ int entry = -1;
+
+ if (timeout_style == TIMEOUT_STYLE_COUNTDOWN && timeout)
+ {
+ pos = grub_term_save_pos ();
+ print_countdown (pos, timeout);
+ }
+
+ /* Enter interruptible sleep until Escape or a menu hotkey is pressed,
+ or the timeout expires. */
+ saved_time = grub_get_time_ms ();
+ while (1)
+ {
+ int key;
+
+ key = grub_getkey_noblock ();
+ if (key != GRUB_TERM_NO_KEY)
+ {
+ entry = get_entry_index_by_hotkey (menu, key);
+ if (entry >= 0)
+ break;
+ }
+ if (grub_key_is_interrupt (key))
+ {
+ timeout = -1;
+ break;
+ }
+
+ if (timeout > 0 && has_second_elapsed (&saved_time))
+ {
+ timeout--;
+ if (timeout_style == TIMEOUT_STYLE_COUNTDOWN)
+ print_countdown (pos, timeout);
+ }
+
+ if (timeout == 0)
+ /* We will fall through to auto-booting the default entry. */
+ break;
+ }
+
+ grub_env_unset ("timeout");
+ grub_env_unset ("timeout_style");
+ if (entry >= 0)
+ {
+ *auto_boot = 0;
+ return entry;
+ }
+ }
+
+ /* If timeout is 0, drawing is pointless (and ugly). */
+ if (timeout == 0)
+ {
+ *auto_boot = 1;
+ return default_entry;
+ }
+
+ current_entry = default_entry;
+
+ refresh:
+ menu_init (current_entry, menu, nested);
+
+ /* Initialize the time. */
+ saved_time = grub_get_time_ms ();
+
+ 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 && has_second_elapsed (&saved_time))
+ {
+ timeout--;
+ grub_menu_set_timeout (timeout);
+ menu_print_timeout (timeout);
+ }
+
+ if (timeout == 0)
+ {
+ grub_env_unset ("timeout");
+ *auto_boot = 1;
+ menu_fini ();
+ return default_entry;
+ }
+
+ c = grub_getkey_noblock ();
+
+ /* Negative values are returned on error. */
+ if ((c != GRUB_TERM_NO_KEY) && (c > 0))
+ {
+ 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 GRUB_TERM_ESC:
+ if (nested)
+ {
+ menu_fini ();
+ return -1;
+ }
+ break;
+
+ case 'c':
+ menu_fini ();
+ grub_cmdline_run (1, 0);
+ 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:
+ {
+ int entry;
+
+ entry = get_entry_index_by_hotkey (menu, c);
+ if (entry >= 0)
+ {
+ menu_fini ();
+ *auto_boot = 0;
+ return entry;
+ }
+ }
+ break;
+ }
+ }
+ }
+
+ /* Never reach here. */
+}
+
+/* Callback invoked immediately before a menu entry is executed. */
+static void
+notify_booting (grub_menu_entry_t entry,
+ void *userdata __attribute__((unused)))
+{
+ grub_printf (" ");
+ grub_printf_ (N_("Booting `%s'"), entry->title);
+ grub_printf ("\n\n");
+}
+
+/* Callback invoked when a default menu entry executed because of a timeout
+ has failed and an attempt will be made to execute the next fallback
+ entry, ENTRY. */
+static void
+notify_fallback (grub_menu_entry_t entry,
+ void *userdata __attribute__((unused)))
+{
+ grub_printf ("\n ");
+ grub_printf_ (N_("Falling back to `%s'"), entry->title);
+ grub_printf ("\n\n");
+ grub_millisleep (DEFAULT_ENTRY_ERROR_DELAY_MS);
+}
+
+/* Callback invoked when a menu entry has failed and there is no remaining
+ fallback entry to attempt. */
+static void
+notify_execution_failure (void *userdata __attribute__((unused)))
+{
+ if (grub_errno != GRUB_ERR_NONE)
+ {
+ grub_print_error ();
+ grub_errno = GRUB_ERR_NONE;
+ }
+ grub_printf ("\n ");
+ grub_printf_ (N_("Failed to boot both default and fallback entries.\n"));
+ grub_wait_after_message ();
+}
+
+/* Callbacks used by the text menu to provide user feedback when menu entries
+ are executed. */
+static struct grub_menu_execute_callback execution_callback =
+{
+ .notify_booting = notify_booting,
+ .notify_fallback = notify_fallback,
+ .notify_failure = notify_execution_failure
+};
+
+static grub_err_t
+show_menu (grub_menu_t menu, int nested, int autobooted)
+{
+ while (1)
+ {
+ int boot_entry;
+ grub_menu_entry_t e;
+ int auto_boot;
+
+ boot_entry = run_menu (menu, nested, &auto_boot);
+ if (boot_entry < 0)
+ break;
+
+ e = grub_menu_get_entry (menu, boot_entry);
+ if (! e)
+ continue; /* Menu is empty. */
+
+ grub_cls ();
+
+ if (auto_boot)
+ grub_menu_execute_with_fallback (menu, e, autobooted,
+ &execution_callback, 0);
+ else
+ grub_menu_execute_entry (e, 0);
+ if (autobooted)
+ break;
+ }
+
+ return GRUB_ERR_NONE;
+}
+
+grub_err_t
+grub_show_menu (grub_menu_t menu, int nested, int autoboot)
+{
+ grub_err_t err1, err2;
+
+ while (1)
+ {
+ err1 = show_menu (menu, nested, autoboot);
+ autoboot = 0;
+ grub_print_error ();
+
+ if (grub_normal_exit_level)
+ break;
+
+ err2 = grub_auth_check_authentication (NULL);
+ if (err2)
+ {
+ grub_print_error ();
+ grub_errno = GRUB_ERR_NONE;
+ continue;
+ }
+
+ break;
+ }
+
+ return err1;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-09 10:28:25 +0000