1 files changed, 115 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r3/linux/RTSystemFirmware-linux.cpp b/src/VBox/Runtime/r3/linux/RTSystemFirmware-linux.cpp
new file mode 100644
index 00000000..2d7b8986
--- /dev/null
+++ b/src/VBox/Runtime/r3/linux/RTSystemFirmware-linux.cpp
@@ -0,0 +1,115 @@
+/* $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);
+