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/* $Id: RTSystemFirmware-linux.cpp $ */
/** @file
* IPRT - System firmware information, linux.
*/
/*
* Copyright (C) 2019-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program 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, in version 3 of the
* License.
*
* This program 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 this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include "internal/iprt.h"
#include <iprt/system.h>
#include <iprt/err.h>
#include <iprt/file.h>
#include <iprt/string.h>
#include <iprt/linux/sysfs.h>
/*********************************************************************************************************************************
* Defined Constants And Macros *
*********************************************************************************************************************************/
/** Defines the UEFI Globals UUID that is used here as filename suffix (case sensitive). */
#define VBOX_UEFI_UUID_GLOBALS "8be4df61-93ca-11d2-aa0d-00e098032b8c"
RTDECL(int) RTSystemQueryFirmwareType(PRTSYSFWTYPE penmFirmwareType)
{
if (RTLinuxSysFsExists("firmware/efi/"))
*penmFirmwareType = RTSYSFWTYPE_UEFI;
else if (RTLinuxSysFsExists(""))
*penmFirmwareType = RTSYSFWTYPE_BIOS;
else
{
*penmFirmwareType = RTSYSFWTYPE_INVALID;
return VERR_NOT_SUPPORTED;
}
return VINF_SUCCESS;
}
RT_EXPORT_SYMBOL(RTSystemQueryFirmwareType);
RTDECL(int) RTSystemQueryFirmwareBoolean(RTSYSFWBOOL enmBoolean, bool *pfValue)
{
*pfValue = false;
/*
* Translate the property to variable base filename.
*/
const char *pszName;
switch (enmBoolean)
{
case RTSYSFWBOOL_SECURE_BOOT:
pszName = "firmware/efi/efivars/SecureBoot";
break;
default:
AssertReturn(enmBoolean > RTSYSFWBOOL_INVALID && enmBoolean < RTSYSFWBOOL_END, VERR_INVALID_PARAMETER);
return VERR_SYS_UNSUPPORTED_FIRMWARE_PROPERTY;
}
/*
* Try open and read the variable value.
*/
RTFILE hFile;
int rc = RTLinuxSysFsOpen(&hFile, "%s-" VBOX_UEFI_UUID_GLOBALS, pszName);
/** @todo try other suffixes if file-not-found. */
if (RT_SUCCESS(rc))
{
uint8_t abBuf[16];
size_t cbRead = 0;
rc = RTLinuxSysFsReadFile(hFile, abBuf, sizeof(abBuf), &cbRead);
*pfValue = cbRead > 1 && abBuf[cbRead - 1] != 0;
RTFileClose(hFile);
}
else if (rc == VERR_FILE_NOT_FOUND || rc == VERR_PATH_NOT_FOUND)
rc = VINF_SUCCESS;
else if (rc == VERR_PERMISSION_DENIED)
rc = VERR_NOT_SUPPORTED;
return rc;
}
RT_EXPORT_SYMBOL(RTSystemQueryFirmwareBoolean);
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