| /* 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; |
| |
| old_os_indications = grub_efi_get_variable ("OsIndications", &global, |
| &oi_size); |
| |
| 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; |
| |
| os_indications_supported = grub_efi_get_variable ("OsIndicationsSupported", |
| &global, &oi_size); |
| |
| 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); |
| } |