VirtualBox

source: vbox/trunk/src/VBox/Runtime/r3/linux/RTSystemFirmware-linux.cpp@ 103795

Last change on this file since 103795 was 98103, checked in by vboxsync, 2 years ago

Copyright year updates by scm.

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1/* $Id: RTSystemFirmware-linux.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
2/** @file
3 * IPRT - System firmware information, linux.
4 */
5
6/*
7 * Copyright (C) 2019-2023 Oracle and/or its affiliates.
8 *
9 * This file is part of VirtualBox base platform packages, as
10 * available from https://www.virtualbox.org.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation, in version 3 of the
15 * License.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, see <https://www.gnu.org/licenses>.
24 *
25 * The contents of this file may alternatively be used under the terms
26 * of the Common Development and Distribution License Version 1.0
27 * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
28 * in the VirtualBox distribution, in which case the provisions of the
29 * CDDL are applicable instead of those of the GPL.
30 *
31 * You may elect to license modified versions of this file under the
32 * terms and conditions of either the GPL or the CDDL or both.
33 *
34 * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
35 */
36
37
38/*********************************************************************************************************************************
39* Header Files *
40*********************************************************************************************************************************/
41#include "internal/iprt.h"
42#include <iprt/system.h>
43
44#include <iprt/err.h>
45#include <iprt/file.h>
46#include <iprt/string.h>
47#include <iprt/linux/sysfs.h>
48
49
50/*********************************************************************************************************************************
51* Defined Constants And Macros *
52*********************************************************************************************************************************/
53/** Defines the UEFI Globals UUID that is used here as filename suffix (case sensitive). */
54#define VBOX_UEFI_UUID_GLOBALS "8be4df61-93ca-11d2-aa0d-00e098032b8c"
55
56
57RTDECL(int) RTSystemQueryFirmwareType(PRTSYSFWTYPE penmFirmwareType)
58{
59 if (RTLinuxSysFsExists("firmware/efi/"))
60 *penmFirmwareType = RTSYSFWTYPE_UEFI;
61 else if (RTLinuxSysFsExists(""))
62 *penmFirmwareType = RTSYSFWTYPE_BIOS;
63 else
64 {
65 *penmFirmwareType = RTSYSFWTYPE_INVALID;
66 return VERR_NOT_SUPPORTED;
67 }
68 return VINF_SUCCESS;
69}
70RT_EXPORT_SYMBOL(RTSystemQueryFirmwareType);
71
72
73RTDECL(int) RTSystemQueryFirmwareBoolean(RTSYSFWBOOL enmBoolean, bool *pfValue)
74{
75 *pfValue = false;
76
77 /*
78 * Translate the property to variable base filename.
79 */
80 const char *pszName;
81 switch (enmBoolean)
82 {
83 case RTSYSFWBOOL_SECURE_BOOT:
84 pszName = "firmware/efi/efivars/SecureBoot";
85 break;
86
87 default:
88 AssertReturn(enmBoolean > RTSYSFWBOOL_INVALID && enmBoolean < RTSYSFWBOOL_END, VERR_INVALID_PARAMETER);
89 return VERR_SYS_UNSUPPORTED_FIRMWARE_PROPERTY;
90
91 }
92
93 /*
94 * Try open and read the variable value.
95 */
96 RTFILE hFile;
97 int rc = RTLinuxSysFsOpen(&hFile, "%s-" VBOX_UEFI_UUID_GLOBALS, pszName);
98 /** @todo try other suffixes if file-not-found. */
99 if (RT_SUCCESS(rc))
100 {
101 uint8_t abBuf[16];
102 size_t cbRead = 0;
103 rc = RTLinuxSysFsReadFile(hFile, abBuf, sizeof(abBuf), &cbRead);
104 *pfValue = cbRead > 1 && abBuf[cbRead - 1] != 0;
105 RTFileClose(hFile);
106 }
107 else if (rc == VERR_FILE_NOT_FOUND || rc == VERR_PATH_NOT_FOUND)
108 rc = VINF_SUCCESS;
109 else if (rc == VERR_PERMISSION_DENIED)
110 rc = VERR_NOT_SUPPORTED;
111
112 return rc;
113}
114RT_EXPORT_SYMBOL(RTSystemQueryFirmwareBoolean);
115
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