91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
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/* fwsetup.c - Reboot into firmware setup menu. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2012 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/types.h>
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#include <grub/mm.h>
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#include <grub/misc.h>
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#include <grub/efi/api.h>
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#include <grub/efi/efi.h>
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#include <grub/command.h>
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#include <grub/i18n.h>
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GRUB_MOD_LICENSE ("GPLv3+");
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static grub_err_t
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grub_cmd_fwsetup (grub_command_t cmd __attribute__ ((unused)),
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int argc __attribute__ ((unused)),
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char **args __attribute__ ((unused)))
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{
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grub_efi_uint64_t *old_os_indications;
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grub_efi_uint64_t os_indications = GRUB_EFI_OS_INDICATIONS_BOOT_TO_FW_UI;
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grub_err_t status;
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grub_size_t oi_size;
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grub_efi_guid_t global = GRUB_EFI_GLOBAL_VARIABLE_GUID;
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old_os_indications = grub_efi_get_variable ("OsIndications", &global,
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&oi_size);
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if (old_os_indications != NULL && oi_size == sizeof (os_indications))
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os_indications |= *old_os_indications;
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status = grub_efi_set_variable ("OsIndications", &global, &os_indications,
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sizeof (os_indications));
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if (status != GRUB_ERR_NONE)
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return status;
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grub_reboot ();
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return GRUB_ERR_BUG;
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}
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static grub_command_t cmd = NULL;
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static grub_efi_boolean_t
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efifwsetup_is_supported (void)
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{
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grub_efi_uint64_t *os_indications_supported = NULL;
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grub_size_t oi_size = 0;
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grub_efi_guid_t global = GRUB_EFI_GLOBAL_VARIABLE_GUID;
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os_indications_supported = grub_efi_get_variable ("OsIndicationsSupported",
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&global, &oi_size);
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if (!os_indications_supported)
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return 0;
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if (*os_indications_supported & GRUB_EFI_OS_INDICATIONS_BOOT_TO_FW_UI)
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return 1;
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return 0;
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}
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GRUB_MOD_INIT (efifwsetup)
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{
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if (efifwsetup_is_supported ())
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cmd = grub_register_command ("fwsetup", grub_cmd_fwsetup, NULL,
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N_("Reboot into firmware setup menu."));
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}
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GRUB_MOD_FINI (efifwsetup)
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{
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if (cmd)
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grub_unregister_command (cmd);
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}
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