kern/command.c

   1 /* command.c - support basic command */
   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 #include <grub/mm.h>
  21 #include <grub/command.h>
  22
  23 grub_command_t grub_command_list;
  24
  25 grub_command_t
  26 grub_register_command_prio (const char *name,
  27                             grub_command_func_t func,
  28                             const char *summary,
  29                             const char *description,
  30                             int prio)
  31 {
  32   grub_command_t cmd;
  33
  34   cmd = (grub_command_t) grub_malloc (sizeof (*cmd));
  35   if (! cmd)
  36     return 0;
  37
  38   cmd->name = name;
  39   cmd->func = func;
  40   cmd->summary = (summary) ? summary : name;
  41   cmd->description = description;
  42
  43   cmd->flags = GRUB_COMMAND_FLAG_BOTH;
  44   cmd->prio = prio;
  45   cmd->data = 0;
  46
  47   grub_prio_list_insert (GRUB_AS_PRIO_LIST_P (&grub_command_list),
  48                          GRUB_AS_PRIO_LIST (cmd));
  49
  50   return cmd;
  51 }
  52
  53 void
  54 grub_unregister_command (grub_command_t cmd)
  55 {
  56   grub_prio_list_remove (GRUB_AS_PRIO_LIST_P (&grub_command_list),
  57                          GRUB_AS_PRIO_LIST (cmd));
  58   grub_free (cmd);
  59 }