arch/common/boot/grub2/lib/efi/datetime.c

   1 /* kern/efi/datetime.c - efi datetime function.
   2  *
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2008  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/types.h>
  21 #include <grub/symbol.h>
  22 #include <grub/efi/api.h>
  23 #include <grub/efi/efi.h>
  24 #include <grub/lib/datetime.h>
  25
  26 grub_err_t
  27 grub_get_datetime (struct grub_datetime *datetime)
  28 {
  29   grub_efi_status_t status;
  30   struct grub_efi_time efi_time;
  31
  32   status = efi_call_2 (grub_efi_system_table->runtime_services->get_time,
  33                        &efi_time, 0);
  34
  35   if (status)
  36     return grub_error (GRUB_ERR_INVALID_COMMAND,
  37                        "can\'t get datetime using efi");
  38   else
  39     {
  40       datetime->year = efi_time.year;
  41       datetime->month = efi_time.month;
  42       datetime->day = efi_time.day;
  43       datetime->hour = efi_time.hour;
  44       datetime->minute = efi_time.minute;
  45       datetime->second = efi_time.second;
  46     }
  47
  48   return 0;
  49 }
  50
  51 grub_err_t
  52 grub_set_datetime (struct grub_datetime *datetime)
  53 {
  54   grub_efi_status_t status;
  55   struct grub_efi_time efi_time;
  56
  57   status = efi_call_2 (grub_efi_system_table->runtime_services->get_time,
  58                        &efi_time, 0);
  59
  60   if (status)
  61     return grub_error (GRUB_ERR_INVALID_COMMAND,
  62                        "can\'t get datetime using efi");
  63
  64   efi_time.year = datetime->year;
  65   efi_time.month = datetime->month;
  66   efi_time.day = datetime->day;
  67   efi_time.hour = datetime->hour;
  68   efi_time.minute = datetime->minute;
  69   efi_time.second = datetime->second;
  70
  71   status = efi_call_1 (grub_efi_system_table->runtime_services->set_time,
  72                        &efi_time);
  73
  74   if (status)
  75     return grub_error (GRUB_ERR_INVALID_COMMAND,
  76                        "can\'t set datetime using efi");
  77
  78   return 0;
  79 }