include/grub/menu.h

   1 /* menu.h - Menu model function prototypes and data structures. */
   2 /*
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2009  Free Software Foundation, Inc.
   5  *
   6  *  GRUB is free software: you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation, either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  GRUB is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #ifndef GRUB_MENU_HEADER
  21 #define GRUB_MENU_HEADER 1
  22
  23 struct grub_menu_entry_class
  24 {
  25   char *name;
  26   struct grub_menu_entry_class *next;
  27 };
  28
  29 /* The menu entry.  */
  30 struct grub_menu_entry
  31 {
  32   /* The title name.  */
  33   const char *title;
  34
  35   /* The classes associated with the menu entry:
  36      used to choose an icon or other style attributes.
  37      This is a dummy head node for the linked list, so for an entry E,
  38      E.classes->next is the first class if it is not NULL.  */
  39   struct grub_menu_entry_class *classes;
  40
  41   /* The sourcecode of the menu entry, used by the editor.  */
  42   const char *sourcecode;
  43
  44   /* The next element.  */
  45   struct grub_menu_entry *next;
  46 };
  47 typedef struct grub_menu_entry *grub_menu_entry_t;
  48
  49 /* The menu.  */
  50 struct grub_menu
  51 {
  52   /* The size of a menu.  */
  53   int size;
  54
  55   /* The list of menu entries.  */
  56   grub_menu_entry_t entry_list;
  57 };
  58 typedef struct grub_menu *grub_menu_t;
  59
  60 /* Callback structure menu viewers can use to provide user feedback when
  61    default entries are executed, possibly including fallback entries.  */
  62 typedef struct grub_menu_execute_callback
  63 {
  64   /* Called immediately before ENTRY is booted.  */
  65   void (*notify_booting) (grub_menu_entry_t entry, void *userdata);
  66
  67   /* Called when executing one entry has failed, and another entry, ENTRY, will
  68      be executed as a fallback.  The implementation of this function should
  69      delay for a period of at least 2 seconds before returning in order to
  70      allow the user time to read the information before it can be lost by
  71      executing ENTRY.  */
  72   void (*notify_fallback) (grub_menu_entry_t entry, void *userdata);
  73
  74   /* Called when an entry has failed to execute and there is no remaining
  75      fallback entry to attempt.  */
  76   void (*notify_failure) (void *userdata);
  77 }
  78 *grub_menu_execute_callback_t;
  79
  80
  81 grub_menu_entry_t grub_menu_get_entry (grub_menu_t menu, int no);
  82 int grub_menu_get_timeout (void);
  83 void grub_menu_set_timeout (int timeout);
  84 void grub_menu_execute_entry (grub_menu_entry_t entry);
  85 void grub_menu_execute_with_fallback (grub_menu_t menu,
  86                                       grub_menu_entry_t entry,
  87                                       grub_menu_execute_callback_t callback,
  88                                       void *callback_data);
  89 void grub_menu_entry_run (grub_menu_entry_t entry);
  90
  91 #endif /* GRUB_MENU_HEADER */