C++ RTFileClose函数代码示例

int main()
{
    int rc = RTTestInitAndCreate("tstRTFileAio", &g_hTest);
    if (rc)
        return rc;

    /* Check if the API is available. */
    RTTestSub(g_hTest, "RTFileAioGetLimits");
    RTFILEAIOLIMITS AioLimits;
    RT_ZERO(AioLimits);
    RTTESTI_CHECK_RC(rc = RTFileAioGetLimits(&AioLimits), VINF_SUCCESS);
    if (RT_SUCCESS(rc))
    {
        RTTestSub(g_hTest, "Write");
        RTFILE hFile;
        RTTESTI_CHECK_RC(rc = RTFileOpen(&hFile, "tstFileAio#1.tst",
                                         RTFILE_O_READWRITE | RTFILE_O_CREATE_REPLACE | RTFILE_O_DENY_NONE | RTFILE_O_ASYNC_IO),
                         VINF_SUCCESS);
        if (RT_SUCCESS(rc))
        {
            uint8_t *pbTestBuf = (uint8_t *)RTTestGuardedAllocTail(g_hTest, TSTFILEAIO_BUFFER_SIZE);
            for (unsigned i = 0; i < TSTFILEAIO_BUFFER_SIZE; i++)
                pbTestBuf[i] = i % 256;

            uint32_t cReqsMax = AioLimits.cReqsOutstandingMax < TSTFILEAIO_MAX_REQS_IN_FLIGHT
                              ? AioLimits.cReqsOutstandingMax
                              : TSTFILEAIO_MAX_REQS_IN_FLIGHT;

            /* Basic write test. */
            RTTestIPrintf(RTTESTLVL_ALWAYS, "Preparing test file, this can take some time and needs quite a bit of harddisk space...\n");
            tstFileAioTestReadWriteBasic(hFile, true /*fWrite*/, pbTestBuf, TSTFILEAIO_BUFFER_SIZE, 100*_1M, cReqsMax);

            /* Reopen the file before doing the next test. */
            RTTESTI_CHECK_RC(RTFileClose(hFile), VINF_SUCCESS);
            if (RTTestErrorCount(g_hTest) == 0)
            {
                RTTestSub(g_hTest, "Read/Write");
                RTTESTI_CHECK_RC(rc = RTFileOpen(&hFile, "tstFileAio#1.tst",
                                                 RTFILE_O_READWRITE | RTFILE_O_OPEN | RTFILE_O_DENY_NONE | RTFILE_O_ASYNC_IO),
                                 VINF_SUCCESS);
                if (RT_SUCCESS(rc))
                {
                    tstFileAioTestReadWriteBasic(hFile, false /*fWrite*/, pbTestBuf, TSTFILEAIO_BUFFER_SIZE, 100*_1M, cReqsMax);
                    RTFileClose(hFile);
                }
            }

            /* Cleanup */
            RTFileDelete("tstFileAio#1.tst");
        }
    }

    /*
     * Summary
     */
    return RTTestSummaryAndDestroy(g_hTest);
}

USBLIB_DECL(int) USBLibInit(void)
{
    LogFlow((USBLIBR3 ":USBLibInit\n"));

    /*
     * Already open?
     * This isn't properly serialized, but we'll be fine with the current usage.
     */
    if (g_cUsers)
    {
        ASMAtomicIncU32(&g_cUsers);
        return VINF_SUCCESS;
    }

    RTFILE File;
    int rc = RTFileOpen(&File, VBOXUSB_DEVICE_NAME, RTFILE_O_READWRITE | RTFILE_O_OPEN | RTFILE_O_DENY_NONE);
    if (RT_FAILURE(rc))
    {
        LogRel((USBLIBR3 ":RTFileOpen failed to open VBoxUSB device.rc=%d\n", rc));
        return rc;
    }
    g_File = File;

    ASMAtomicIncU32(&g_cUsers);
    /*
     * Check the USBMonitor version.
     */
    VBOXUSBREQ_GET_VERSION Req;
    bzero(&Req, sizeof(Req));
    rc = usblibDoIOCtl(VBOXUSBMON_IOCTL_GET_VERSION, &Req, sizeof(Req));
    if (RT_SUCCESS(rc))
    {
        if (   Req.u32Major != VBOXUSBMON_VERSION_MAJOR
            || Req.u32Minor < VBOXUSBMON_VERSION_MINOR)
        {
            rc = VERR_VERSION_MISMATCH;
            LogRel((USBLIBR3 ":USBMonitor version mismatch! driver v%d.%d, expecting ~v%d.%d\n",
                        Req.u32Major, Req.u32Minor, VBOXUSBMON_VERSION_MAJOR, VBOXUSBMON_VERSION_MINOR));

            RTFileClose(File);
            g_File = NIL_RTFILE;
            ASMAtomicDecU32(&g_cUsers);
            return rc;
        }
    }
    else
    {
        LogRel((USBLIBR3 ":USBMonitor driver version query failed. rc=%Rrc\n", rc));
        RTFileClose(File);
        g_File = NIL_RTFILE;
        ASMAtomicDecU32(&g_cUsers);
        return rc;
    }

    return VINF_SUCCESS;
}

RTR3DECL(int) RTProcDaemonize(const char * const *papszArgs, const char *pszDaemonizedOpt)
{
    /*
     * Get the executable name.
     * If this asserts, it's probably because rtR3Init hasn't been called.
     */
    char szExecPath[RTPATH_MAX];
    AssertReturn(RTProcGetExecutablePath(szExecPath, sizeof(szExecPath)) == szExecPath, VERR_WRONG_ORDER);

    /*
     * Create a copy of the argument list with the daemonized option appended.
     */
    unsigned cArgs = 0;
    while (papszArgs[cArgs])
        cArgs++;

    char const **papszNewArgs = (char const **)RTMemAlloc(sizeof(const char *) * (cArgs + 2));
    if (!papszNewArgs)
        return VERR_NO_MEMORY;
    for (unsigned i = 0; i < cArgs; i++)
        papszNewArgs[i] = papszArgs[i];
    papszNewArgs[cArgs] = pszDaemonizedOpt;
    papszNewArgs[cArgs + 1] = NULL;

    /*
     * Open the bitbucket handles and create the detached process.
     */
    RTHANDLE hStdIn;
    int rc = RTFileOpenBitBucket(&hStdIn.u.hFile, RTFILE_O_READ);
    if (RT_SUCCESS(rc))
    {
        hStdIn.enmType = RTHANDLETYPE_FILE;

        RTHANDLE hStdOutAndErr;
        rc = RTFileOpenBitBucket(&hStdOutAndErr.u.hFile, RTFILE_O_WRITE);
        if (RT_SUCCESS(rc))
        {
            hStdOutAndErr.enmType = RTHANDLETYPE_FILE;

            rc = RTProcCreateEx(szExecPath, papszNewArgs, RTENV_DEFAULT,
                                RTPROC_FLAGS_DETACHED | RTPROC_FLAGS_SAME_CONTRACT,
                                &hStdIn, &hStdOutAndErr, &hStdOutAndErr,
                                NULL /*pszAsUser*/,  NULL /*pszPassword*/, NULL /*phProcess*/);

            RTFileClose(hStdOutAndErr.u.hFile);
        }

        RTFileClose(hStdOutAndErr.u.hFile);
    }
    RTMemFree(papszNewArgs);
    return rc;
}

DECLINLINE(int) tftpReadDataBlock(PNATState pData,
                                  PTFTPSESSION pcTftpSession,
                                  uint8_t *pu8Data,
                                  int *pcbReadData)
{
    RTFILE  hSessionFile;
    int rc = VINF_SUCCESS;
    uint16_t u16BlkSize = 0;
    AssertPtrReturn(pData, VERR_INVALID_PARAMETER);
    AssertPtrReturn(pcTftpSession, VERR_INVALID_PARAMETER);
    AssertPtrReturn(pu8Data, VERR_INVALID_PARAMETER);
    AssertPtrReturn(pcbReadData, VERR_INVALID_PARAMETER);
    AssertReturn(pcTftpSession->OptionBlkSize.u64Value < UINT16_MAX, VERR_INVALID_PARAMETER);
    LogFlowFunc(("pcTftpSession:%p, pu8Data:%p, pcbReadData:%p\n",
                    pcTftpSession,
                    pu8Data,
                    pcbReadData));

    u16BlkSize = (uint16_t)pcTftpSession->OptionBlkSize.u64Value;
    rc = pftpSessionOpenFile(pData, pcTftpSession, &hSessionFile);
    if (RT_FAILURE(rc))
    {
        LogFlowFuncLeaveRC(rc);
        return rc;
    }

    if (pcbReadData)
    {
        rc = RTFileSeek(hSessionFile,
                        pcTftpSession->cbTransfered,
                        RTFILE_SEEK_BEGIN,
                        NULL);
        if (RT_FAILURE(rc))
        {
            RTFileClose(hSessionFile);
            LogFlowFuncLeaveRC(rc);
            return rc;
        }
        rc = RTFileRead(hSessionFile, pu8Data, u16BlkSize, (size_t *)pcbReadData);
        if (RT_FAILURE(rc))
        {
            RTFileClose(hSessionFile);
            LogFlowFuncLeaveRC(rc);
            return rc;
        }
    }

    rc = RTFileClose(hSessionFile);

    LogFlowFuncLeaveRC(rc);
    return rc;
}

VBGLR3DECL(void) VbglR3Term(void)
{
    /*
     * Decrement the reference count and see if we're the last one out.
     */
    uint32_t cInits = ASMAtomicDecU32(&g_cInits);
    if (cInits > 0)
        return;
#if !defined(VBOX_VBGLR3_XSERVER)
    AssertReturnVoid(!cInits);

# if defined(RT_OS_WINDOWS)
    HANDLE hFile = g_hFile;
    g_hFile = INVALID_HANDLE_VALUE;
    AssertReturnVoid(hFile != INVALID_HANDLE_VALUE);
    BOOL fRc = CloseHandle(hFile);
    Assert(fRc); NOREF(fRc);

# elif defined(RT_OS_OS2)
    RTFILE File = g_File;
    g_File = NIL_RTFILE;
    AssertReturnVoid(File != NIL_RTFILE);
    APIRET rc = DosClose((uintptr_t)File);
    AssertMsg(!rc, ("%ld\n", rc));

#elif defined(RT_OS_DARWIN)
    io_connect_t    uConnection = g_uConnection;
    RTFILE          hFile       = g_File;
    g_uConnection = 0;
    g_File        = NIL_RTFILE;
    kern_return_t kr = IOServiceClose(uConnection);
    AssertMsg(kr == kIOReturnSuccess, ("%#x (%d)\n", kr, kr));
    int rc = RTFileClose(hFile);
    AssertRC(rc);

# else /* The IPRT case. */
    RTFILE File = g_File;
    g_File = NIL_RTFILE;
    AssertReturnVoid(File != NIL_RTFILE);
    int rc = RTFileClose(File);
    AssertRC(rc);
# endif

#else  /* VBOX_VBGLR3_XSERVER */
    int File = g_File;
    g_File = -1;
    if (File == -1)
        return;
    xf86close(File);
#endif /* VBOX_VBGLR3_XSERVER */
}

int DnDHGSendFilePrivate::currentMessage(uint32_t uMsg, uint32_t cParms, VBOXHGCMSVCPARM paParms[])
{
    if (!m_pNextMsg)
        return VERR_NO_DATA;

    int rc = m_pNextMsg->getData(uMsg, cParms, paParms);
    clearNextMsg();
    if (RT_FAILURE(rc))
        return rc;

    if (!m_hCurFile)
    {
        rc = RTFileOpen(&m_hCurFile, m_strHostPath.c_str(), RTFILE_O_OPEN | RTFILE_O_READ | RTFILE_O_DENY_ALL);
        if (RT_FAILURE(rc))
            return rc;
    }

    /* How big is the pointer provided by the guest? */
    uint32_t cbToRead = paParms[2].u.pointer.size;
    size_t cbRead;
    rc = RTFileRead(m_hCurFile, paParms[2].u.pointer.addr, cbToRead, &cbRead);
    if (RT_FAILURE(rc))
    {
        /* On error, immediately close the file. */
        RTFileClose(m_hCurFile);
        m_hCurFile = 0;
        return rc;
    }
    m_cbDone += cbRead;
    /* Tell the guest the actual size. */
    paParms[3].setUInt32(cbRead);
    /* Check if we are done. */
    if (m_cbSize == m_cbDone)
    {
        RTFileClose(m_hCurFile);
        m_hCurFile = 0;
    }
    else
    {
        /* More data! Prepare the next message. */
        m_pNextMsg = new HGCM::Message(DragAndDropSvc::HOST_DND_HG_SND_FILE, 5, m_paSkelParms);
    }

    /* Advance progress info */
    if (   RT_SUCCESS(rc)
        && m_pfnProgressCallback)
        rc = m_pfnProgressCallback(cbRead, m_pvProgressUser);

    return rc;
}

RTDECL(int) RTFileCopyEx(const char *pszSrc, const char *pszDst, uint32_t fFlags, PFNRTPROGRESS pfnProgress, void *pvUser)
{
    /*
     * Validate input.
     */
    AssertMsgReturn(VALID_PTR(pszSrc), ("pszSrc=%p\n", pszSrc), VERR_INVALID_PARAMETER);
    AssertMsgReturn(*pszSrc, ("pszSrc=%p\n", pszSrc), VERR_INVALID_PARAMETER);
    AssertMsgReturn(VALID_PTR(pszDst), ("pszDst=%p\n", pszDst), VERR_INVALID_PARAMETER);
    AssertMsgReturn(*pszDst, ("pszDst=%p\n", pszDst), VERR_INVALID_PARAMETER);
    AssertMsgReturn(!pfnProgress || VALID_PTR(pfnProgress), ("pfnProgress=%p\n", pfnProgress), VERR_INVALID_PARAMETER);
    AssertMsgReturn(!(fFlags & ~RTFILECOPY_FLAGS_MASK), ("%#x\n", fFlags), VERR_INVALID_PARAMETER);

    /*
     * Open the files.
     */
    RTFILE FileSrc;
    int rc = RTFileOpen(&FileSrc, pszSrc,
                        RTFILE_O_READ | RTFILE_O_OPEN
                        | (fFlags & RTFILECOPY_FLAGS_NO_SRC_DENY_WRITE ? RTFILE_O_DENY_NONE : RTFILE_O_DENY_WRITE));
    if (RT_SUCCESS(rc))
    {
        RTFILE FileDst;
        rc = RTFileOpen(&FileDst, pszDst,
                        RTFILE_O_WRITE | RTFILE_O_CREATE
                        | (fFlags & RTFILECOPY_FLAGS_NO_DST_DENY_WRITE ? RTFILE_O_DENY_NONE : RTFILE_O_DENY_WRITE));
        if (RT_SUCCESS(rc))
        {
            /*
             * Call the ByHandles version and let it do the job.
             */
            rc = RTFileCopyByHandlesEx(FileSrc, FileDst, pfnProgress, pvUser);

            /*
             * Close the files regardless of the result.
             * Don't bother cleaning up or anything like that.
             */
            int rc2 = RTFileClose(FileDst);
            AssertRC(rc2);
            if (RT_FAILURE(rc2) && RT_SUCCESS(rc))
                rc = rc2;
        }

        int rc2 = RTFileClose(FileSrc);
        AssertRC(rc2);
        if (RT_FAILURE(rc2) && RT_SUCCESS(rc))
            rc = rc2;
    }
    return rc;
}

/**
 * Writes the stream to a file.
 *
 * @returns IPRT status code
 * @param   pStream             The stream.
 * @param   pszFilenameFmt      The filename format string.
 * @param   ...                 Format arguments.
 */
int ScmStreamWriteToFile(PSCMSTREAM pStream, const char *pszFilenameFmt, ...)
{
    int rc;

#ifdef RT_STRICT
    /*
     * Check that what we're going to write makes sense first.
     */
    rc = ScmStreamCheckItegrity(pStream);
    if (RT_FAILURE(rc))
        return rc;
#endif

    /*
     * Do the actual writing.
     */
    RTFILE hFile;
    va_list va;
    va_start(va, pszFilenameFmt);
    rc = RTFileOpenV(&hFile, RTFILE_O_WRITE | RTFILE_O_CREATE_REPLACE | RTFILE_O_DENY_WRITE, pszFilenameFmt, va);
    if (RT_SUCCESS(rc))
    {
        rc = RTFileWrite(hFile, pStream->pch, pStream->cb, NULL);
        RTFileClose(hFile);
    }
    va_end(va);
    return rc;
}

void DnDURIObject::closeInternal(void)
{
    switch (m_Type)
    {
        case File:
        {
            if (u.m_hFile)
            {
                int rc2 = RTFileClose(u.m_hFile);
                AssertRC(rc2);

                u.m_hFile = NULL;
            }
            break;
        }

        case Directory:
            break;

        default:
            break;
    }

    LogFlowThisFuncLeave();
}

/**
 * Closes the object's internal handles (to files / ...).
 *
 */
void DnDURIObject::closeInternal(void)
{
    LogFlowThisFuncEnter();

    switch (m_enmType)
    {
        case Type_File:
        {
            RTFileClose(u.File.hFile);
            u.File.hFile = NIL_RTFILE;
            RT_ZERO(u.File.objInfo);
            break;
        }

        case Type_Directory:
        {
            RTDirClose(u.Dir.hDir);
            u.Dir.hDir = NIL_RTDIR;
            RT_ZERO(u.Dir.objInfo);
            break;
        }

        default:
            break;
    }
}

/**
 * EMT Rendezvous worker function for DBGFR3CoreWrite().
 *
 * @param   pVM              Pointer to the VM.
 * @param   pVCpu            The handle of the calling VCPU.
 * @param   pvData           Opaque data.
 *
 * @return VBox status code.
 */
static DECLCALLBACK(VBOXSTRICTRC) dbgfR3CoreWriteRendezvous(PVM pVM, PVMCPU pVCpu, void *pvData)
{
    /*
     * Validate input.
     */
    AssertReturn(pVM, VERR_INVALID_VM_HANDLE);
    AssertReturn(pVCpu, VERR_INVALID_VMCPU_HANDLE);
    AssertReturn(pvData, VERR_INVALID_POINTER);

    PDBGFCOREDATA pDbgfData = (PDBGFCOREDATA)pvData;

    /*
     * Create the core file.
     */
    uint32_t fFlags = (pDbgfData->fReplaceFile ? RTFILE_O_CREATE_REPLACE : RTFILE_O_CREATE)
                    | RTFILE_O_WRITE
                    | RTFILE_O_DENY_ALL
                    | (0600 << RTFILE_O_CREATE_MODE_SHIFT);
    RTFILE   hFile;
    int rc = RTFileOpen(&hFile, pDbgfData->pszFilename, fFlags);
    if (RT_SUCCESS(rc))
    {
        rc = dbgfR3CoreWriteWorker(pVM, hFile);
        RTFileClose(hFile);
    }
    else
        LogRel((DBGFLOG_NAME ": RTFileOpen failed for '%s' rc=%Rrc\n", pDbgfData->pszFilename, rc));
    return rc;
}

/**
 * Handles VMMDevCpuEventType_Unplug.
 *
 * @param   idCpuCore       The CPU core ID.
 * @param   idCpuPackage    The CPU package ID.
 */
static void VBoxServiceCpuHotPlugHandleUnplugEvent(uint32_t idCpuCore, uint32_t idCpuPackage)
{
#ifdef RT_OS_LINUX
    char *pszCpuDevicePath = NULL;
    int rc = VBoxServiceCpuHotPlugGetACPIDevicePath(&pszCpuDevicePath, idCpuCore, idCpuPackage);
    if (RT_SUCCESS(rc))
    {
        RTFILE hFileCpuEject;
        rc = RTFileOpenF(&hFileCpuEject, RTFILE_O_WRITE | RTFILE_O_OPEN | RTFILE_O_DENY_NONE,
                         "%s/eject", pszCpuDevicePath);
        if (RT_SUCCESS(rc))
        {
            /* Write a 1 to eject the CPU */
            rc = RTFileWrite(hFileCpuEject, "1", 1, NULL);
            if (RT_SUCCESS(rc))
                VBoxServiceVerbose(1, "CpuHotPlug: CPU %u/%u was ejected\n", idCpuPackage, idCpuCore);
            else
                VBoxServiceError("CpuHotPlug: Failed to eject CPU %u/%u rc=%Rrc\n", idCpuPackage, idCpuCore, rc);

            RTFileClose(hFileCpuEject);
        }
        else
            VBoxServiceError("CpuHotPlug: Failed to open \"%s/eject\" rc=%Rrc\n", pszCpuDevicePath, rc);
        RTStrFree(pszCpuDevicePath);
    }
    else
        VBoxServiceError("CpuHotPlug: Failed to get CPU device path rc=%Rrc\n", rc);
#else
# error "Port me"
#endif
}

/**
 * Creates a PID File and returns the open file descriptor.
 *
 * On DOS based system, file sharing (deny write) is used for locking the PID
 * file.
 *
 * On Unix-y systems, an exclusive advisory lock is used for locking the PID
 * file since the file sharing support is usually missing there.
 *
 * This API will overwrite any existing PID Files without a lock on them, on the
 * assumption that they are stale files which an old process did not properly
 * clean up.
 *
 * @returns IPRT status code.
 * @param   pszPath  The path and filename to create the PID File under
 * @param   phFile   Where to store the file descriptor of the open (and locked
 *                   on Unix-y systems) PID File. On failure, or if another
 *                   process owns the PID File, this will be set to NIL_RTFILE.
 */
VBGLR3DECL(int) VbglR3PidFile(const char *pszPath, PRTFILE phFile)
{
    AssertPtrReturn(pszPath, VERR_INVALID_PARAMETER);
    AssertPtrReturn(phFile, VERR_INVALID_PARAMETER);
    *phFile = NIL_RTFILE;

    RTFILE hPidFile;
    int rc = RTFileOpen(&hPidFile, pszPath,
                        RTFILE_O_READWRITE | RTFILE_O_OPEN_CREATE | RTFILE_O_DENY_WRITE
                        | (0644 << RTFILE_O_CREATE_MODE_SHIFT));
    if (RT_SUCCESS(rc))
    {
#if !defined(RT_OS_WINDOWS) && !defined(RT_OS_OS2)
        /** @todo using size 0 for locking means lock all on Posix.
         * We should adopt this as our convention too, or something
         * similar. */
        rc = RTFileLock(hPidFile, RTFILE_LOCK_WRITE, 0, 0);
        if (RT_FAILURE(rc))
            RTFileClose(hPidFile);
        else
#endif
        {
            char szBuf[256];
            size_t cbPid = RTStrPrintf(szBuf, sizeof(szBuf), "%d\n",
                                       RTProcSelf());
            RTFileWrite(hPidFile, szBuf, cbPid, NULL);
            *phFile = hPidFile;
        }
    }
    return rc;
}

DECLHIDDEN(int) drvHostBaseMediaRefreshOs(PDRVHOSTBASE pThis)
{
    /*
     * Need to re-open the device because it will kill off any cached data
     * that Linux for some peculiar reason thinks should survive a media change.
     */
    if (pThis->Os.hFileDevice != NIL_RTFILE)
    {
        RTFileClose(pThis->Os.hFileDevice);
        pThis->Os.hFileDevice = NIL_RTFILE;
    }
    int rc = drvHostBaseOpenOs(pThis, pThis->fReadOnlyConfig);
    if (RT_FAILURE(rc))
    {
        if (!pThis->fReadOnlyConfig)
        {
            LogFlow(("%s-%d: drvHostBaseMediaRefreshOs: '%s' - retry readonly (%Rrc)\n",
                     pThis->pDrvIns->pReg->szName, pThis->pDrvIns->iInstance, pThis->pszDevice, rc));
            rc = drvHostBaseOpenOs(pThis, true);
        }
        if (RT_FAILURE(rc))
        {
            LogFlow(("%s-%d: failed to open device '%s', rc=%Rrc\n",
                     pThis->pDrvIns->pReg->szName, pThis->pDrvIns->iInstance, pThis->pszDevice, rc));
            return rc;
        }
        pThis->fReadOnly = true;
    }
    else
        pThis->fReadOnly = pThis->fReadOnlyConfig;

    return rc;
}

static void test1(const char *pszSubTest, const char *pszFilename)
{
    int rc;
    RTTestISub(pszSubTest);

    RTFILE hFile;
    rc = RTFileOpen(&hFile, pszFilename, RTFILE_O_READ | RTFILE_O_DENY_NONE | RTFILE_O_OPEN);
    if (RT_FAILURE(rc))
    {
        if (   rc == VERR_ACCESS_DENIED
            || rc == VERR_PERMISSION_DENIED
            || rc == VERR_FILE_NOT_FOUND)
        {
            RTTestIPrintf(RTTESTLVL_ALWAYS, "Cannot access '%s', skipping.", pszFilename);
            return;
        }
        RTTESTI_CHECK_RC_RETV(RTFileOpen(&hFile, pszFilename, RTFILE_O_READ | RTFILE_O_DENY_NONE | RTFILE_O_OPEN), VINF_SUCCESS);
    }

    uint64_t    cbFile = UINT64_MAX - 42;
    RTTESTI_CHECK_RC(rc = RTFileGetSize(hFile, &cbFile), VINF_SUCCESS);
    if (RT_SUCCESS(rc))
    {
        RTTESTI_CHECK(cbFile != UINT64_MAX - 42);
        RTTestIValue(pszSubTest, cbFile, RTTESTUNIT_BYTES);
    }

    RTFileClose(hFile);
    RTTestISubDone();
}