1 files changed, 93 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r3/nt/RTProcQueryParent-r3-nt.cpp b/src/VBox/Runtime/r3/nt/RTProcQueryParent-r3-nt.cpp
new file mode 100644
index 00000000..f213c998
--- /dev/null
+++ b/src/VBox/Runtime/r3/nt/RTProcQueryParent-r3-nt.cpp
@@ -0,0 +1,93 @@
+/* $Id: RTProcQueryParent-r3-nt.cpp $ */
+/** @file
+ * IPRT - Process, Windows.
+ */
+
+/*
+ * Copyright (C) 2006-2020 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE 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.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define LOG_GROUP RTLOGGROUP_PROCESS
+#include <iprt/nt/nt.h>
+
+#include <iprt/process.h>
+#include "internal/iprt.h"
+
+#include <iprt/assert.h>
+#include <iprt/errcore.h>
+
+
+
+RTR3DECL(int) RTProcQueryParent(RTPROCESS hProcess, PRTPROCESS phParent)
+{
+    NTSTATUS    rcNt;
+    HANDLE      hClose = RTNT_INVALID_HANDLE_VALUE;
+    HANDLE      hNtProc;
+
+    /*
+     * Open the process.  We take a shortcut if it's the current process.
+     */
+    if (hProcess == RTProcSelf())
+        hNtProc = NtCurrentProcess();
+    else
+    {
+        CLIENT_ID ClientId;
+        ClientId.UniqueProcess = (HANDLE)(uintptr_t)hProcess;
+        ClientId.UniqueThread  = NULL;
+
+        OBJECT_ATTRIBUTES ObjAttrs;
+        InitializeObjectAttributes(&ObjAttrs, NULL, OBJ_CASE_INSENSITIVE, NULL, NULL);
+
+        rcNt = NtOpenProcess(&hClose, PROCESS_QUERY_LIMITED_INFORMATION, &ObjAttrs, &ClientId);
+        if (!NT_SUCCESS(rcNt))
+            rcNt = NtOpenProcess(&hClose, PROCESS_QUERY_INFORMATION, &ObjAttrs, &ClientId);
+        if (!NT_SUCCESS(rcNt))
+            return RTErrConvertFromNtStatus(rcNt);
+        hNtProc = hClose;
+    }
+
+    /*
+     * Query the information.
+     */
+    int rc;
+    PROCESS_BASIC_INFORMATION BasicInfo;
+    ULONG cbIgn;
+    rcNt = NtQueryInformationProcess(hNtProc, ProcessBasicInformation, &BasicInfo, sizeof(BasicInfo), &cbIgn);
+    if (NT_SUCCESS(rcNt))
+    {
+        *phParent = BasicInfo.InheritedFromUniqueProcessId;
+        rc = VINF_SUCCESS;
+    }
+    else
+        rc = RTErrConvertFromNtStatus(rcNt);
+
+    /*
+     * Clean up.
+     */
+    if (hClose != RTNT_INVALID_HANDLE_VALUE)
+        NtClose(hClose);
+
+    return rc;
+}
+