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/* $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;
}
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