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/* fwsetup.c - Reboot into firmware setup menu. */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2012 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/types.h>
#include <grub/mm.h>
#include <grub/misc.h>
#include <grub/efi/api.h>
#include <grub/efi/efi.h>
#include <grub/command.h>
#include <grub/i18n.h>
GRUB_MOD_LICENSE ("GPLv3+");
static grub_err_t
grub_cmd_fwsetup (grub_command_t cmd __attribute__ ((unused)),
int argc __attribute__ ((unused)),
char **args __attribute__ ((unused)))
{
grub_efi_uint64_t *old_os_indications;
grub_efi_uint64_t os_indications = GRUB_EFI_OS_INDICATIONS_BOOT_TO_FW_UI;
grub_err_t status;
grub_size_t oi_size;
grub_efi_guid_t global = GRUB_EFI_GLOBAL_VARIABLE_GUID;
grub_efi_get_variable ("OsIndications", &global, &oi_size,
(void **) &old_os_indications);
if (old_os_indications != NULL && oi_size == sizeof (os_indications))
os_indications |= *old_os_indications;
status = grub_efi_set_variable ("OsIndications", &global, &os_indications,
sizeof (os_indications));
if (status != GRUB_ERR_NONE)
return status;
grub_reboot ();
return GRUB_ERR_BUG;
}
static grub_command_t cmd = NULL;
static grub_efi_boolean_t
efifwsetup_is_supported (void)
{
grub_efi_uint64_t *os_indications_supported = NULL;
grub_size_t oi_size = 0;
grub_efi_guid_t global = GRUB_EFI_GLOBAL_VARIABLE_GUID;
grub_efi_get_variable ("OsIndicationsSupported", &global, &oi_size,
(void **) &os_indications_supported);
if (!os_indications_supported)
return 0;
if (*os_indications_supported & GRUB_EFI_OS_INDICATIONS_BOOT_TO_FW_UI)
return 1;
return 0;
}
GRUB_MOD_INIT (efifwsetup)
{
if (efifwsetup_is_supported ())
cmd = grub_register_command ("fwsetup", grub_cmd_fwsetup, NULL,
N_("Reboot into firmware setup menu."));
}
GRUB_MOD_FINI (efifwsetup)
{
if (cmd)
grub_unregister_command (cmd);
}
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