| /* |
| * GRUB -- GRand Unified Bootloader |
| * Copyright (C) 2009 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/mm.h> |
| #include <grub/misc.h> |
| #include <grub/env.h> |
| #include <grub/menu_viewer.h> |
| #include <grub/menu.h> |
| #include <grub/auth.h> |
| |
| /* The list of menu viewers. */ |
| static grub_menu_viewer_t menu_viewer_list; |
| |
| void |
| grub_menu_viewer_register (grub_menu_viewer_t viewer) |
| { |
| viewer->next = menu_viewer_list; |
| menu_viewer_list = viewer; |
| } |
| |
| static grub_menu_viewer_t get_current_menu_viewer (void) |
| { |
| const char *selected_name = grub_env_get ("menuviewer"); |
| |
| /* If none selected, pick the last registered one. */ |
| if (selected_name == 0) |
| return menu_viewer_list; |
| |
| grub_menu_viewer_t cur; |
| for (cur = menu_viewer_list; cur; cur = cur->next) |
| { |
| if (grub_strcmp (cur->name, selected_name) == 0) |
| return cur; |
| } |
| |
| /* Fall back to the first entry (or null). */ |
| return menu_viewer_list; |
| } |
| |
| grub_err_t |
| grub_menu_viewer_show_menu (grub_menu_t menu, int nested) |
| { |
| grub_menu_viewer_t cur = get_current_menu_viewer (); |
| grub_err_t err1, err2; |
| if (!cur) |
| return grub_error (GRUB_ERR_BAD_ARGUMENT, "No menu viewer available."); |
| |
| while (1) |
| { |
| err1 = cur->show_menu (menu, nested); |
| grub_print_error (); |
| |
| err2 = grub_auth_check_authentication (NULL); |
| if (err2) |
| { |
| grub_print_error (); |
| grub_errno = GRUB_ERR_NONE; |
| continue; |
| } |
| |
| break; |
| } |
| |
| return err1; |
| } |
| |