Imported from /home/lorry/working-area/delta_VirtualBox/VirtualBox-4.3.10.tar.bz2.HEADVirtualBox-4.3.10master

1 files changed, 697 insertions, 0 deletions

diff --git a/src/VBox/Runtime/r3/nt/direnum-r3-nt.cpp b/src/VBox/Runtime/r3/nt/direnum-r3-nt.cpp
new file mode 100644
index 00000000..f93f6e4e
--- /dev/null
+++ b/src/VBox/Runtime/r3/nt/direnum-r3-nt.cpp
@@ -0,0 +1,697 @@
+/* $Id: direnum-r3-nt.cpp $ */
+/** @file
+ * IPRT - Directory Enumeration, Native NT.
+ */
+
+/*
+ * Copyright (C) 2006-2013 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_DIR
+#include "internal-r3-nt.h"
+
+#include <iprt/dir.h>
+#include <iprt/path.h>
+#include <iprt/mem.h>
+#include <iprt/string.h>
+#include <iprt/assert.h>
+#include <iprt/err.h>
+#include <iprt/file.h>
+#include <iprt/log.h>
+#include "internal/fs.h"
+#include "internal/dir.h"
+
+
+/*******************************************************************************
+*   Defined Constants And Macros                                               *
+*******************************************************************************/
+/** Whether to return a single record (TRUE) or multiple (FALSE)o. */
+#define RTDIR_NT_SINGLE_RECORD  FALSE
+
+/** Go hard on record chaining (has slight performance impact). */
+#ifdef RT_STRICT
+# define RTDIR_NT_STRICT
+#endif
+
+
+/* ASSUMES FileID comes after ShortName and the structus are identical up to that point. */
+AssertCompileMembersSameSizeAndOffset(FILE_BOTH_DIR_INFORMATION, NextEntryOffset, FILE_ID_BOTH_DIR_INFORMATION, NextEntryOffset);
+AssertCompileMembersSameSizeAndOffset(FILE_BOTH_DIR_INFORMATION, FileIndex      , FILE_ID_BOTH_DIR_INFORMATION, FileIndex      );
+AssertCompileMembersSameSizeAndOffset(FILE_BOTH_DIR_INFORMATION, CreationTime   , FILE_ID_BOTH_DIR_INFORMATION, CreationTime   );
+AssertCompileMembersSameSizeAndOffset(FILE_BOTH_DIR_INFORMATION, LastAccessTime , FILE_ID_BOTH_DIR_INFORMATION, LastAccessTime );
+AssertCompileMembersSameSizeAndOffset(FILE_BOTH_DIR_INFORMATION, LastWriteTime  , FILE_ID_BOTH_DIR_INFORMATION, LastWriteTime  );
+AssertCompileMembersSameSizeAndOffset(FILE_BOTH_DIR_INFORMATION, ChangeTime     , FILE_ID_BOTH_DIR_INFORMATION, ChangeTime     );
+AssertCompileMembersSameSizeAndOffset(FILE_BOTH_DIR_INFORMATION, EndOfFile      , FILE_ID_BOTH_DIR_INFORMATION, EndOfFile      );
+AssertCompileMembersSameSizeAndOffset(FILE_BOTH_DIR_INFORMATION, AllocationSize , FILE_ID_BOTH_DIR_INFORMATION, AllocationSize );
+AssertCompileMembersSameSizeAndOffset(FILE_BOTH_DIR_INFORMATION, FileAttributes , FILE_ID_BOTH_DIR_INFORMATION, FileAttributes );
+AssertCompileMembersSameSizeAndOffset(FILE_BOTH_DIR_INFORMATION, FileNameLength , FILE_ID_BOTH_DIR_INFORMATION, FileNameLength );
+AssertCompileMembersSameSizeAndOffset(FILE_BOTH_DIR_INFORMATION, EaSize         , FILE_ID_BOTH_DIR_INFORMATION, EaSize         );
+AssertCompileMembersSameSizeAndOffset(FILE_BOTH_DIR_INFORMATION, ShortNameLength, FILE_ID_BOTH_DIR_INFORMATION, ShortNameLength);
+AssertCompileMembersSameSizeAndOffset(FILE_BOTH_DIR_INFORMATION, ShortName      , FILE_ID_BOTH_DIR_INFORMATION, ShortName      );
+
+
+
+size_t rtDirNativeGetStructSize(const char *pszPath)
+{
+    NOREF(pszPath);
+    return sizeof(RTDIR);
+}
+
+
+int rtDirNativeOpen(PRTDIR pDir, char *pszPathBuf)
+{
+    /*
+     * Convert the filter to UTF-16.
+     */
+    int rc;
+    pDir->pNtFilterStr = NULL;
+    if (   pDir->cchFilter > 0
+        && pDir->enmFilter == RTDIRFILTER_WINNT)
+    {
+        PRTUTF16 pwszTmp;
+        rc = RTStrToUtf16(pDir->pszFilter, &pwszTmp);
+        if (RT_FAILURE(rc))
+            return rc;
+        pDir->NtFilterStr.Buffer = pwszTmp;
+        pDir->NtFilterStr.Length = pDir->NtFilterStr.MaximumLength = (uint16_t)(RTUtf16Len(pwszTmp) * sizeof(RTUTF16));
+        pDir->pNtFilterStr = &pDir->NtFilterStr;
+    }
+
+    /*
+     * Try open the directory
+     */
+#ifdef IPRT_WITH_NT_PATH_PASSTHRU
+    bool fObjDir;
+#endif
+    rc = rtNtPathOpenDir(pszPathBuf,
+                         FILE_READ_DATA | SYNCHRONIZE,
+                         FILE_SHARE_READ | FILE_SHARE_WRITE,
+                         FILE_DIRECTORY_FILE | FILE_OPEN_FOR_BACKUP_INTENT | FILE_SYNCHRONOUS_IO_NONALERT,
+                         OBJ_CASE_INSENSITIVE,
+                         &pDir->hDir,
+#ifdef IPRT_WITH_NT_PATH_PASSTHRU
+                         &fObjDir
+#else
+                         NULL
+#endif
+                         );
+    if (RT_SUCCESS(rc))
+    {
+        /*
+         * Init data.
+         */
+        pDir->fDataUnread = false; /* spelling it out */
+#ifdef IPRT_WITH_NT_PATH_PASSTHRU
+        if (fObjDir)
+            pDir->enmInfoClass = FileMaximumInformation; /* object directory. */
+#endif
+    }
+    return rc;
+}
+
+
+RTDECL(int) RTDirClose(PRTDIR pDir)
+{
+    /*
+     * Validate input.
+     */
+    if (!pDir)
+        return VERR_INVALID_PARAMETER;
+    if (pDir->u32Magic != RTDIR_MAGIC)
+    {
+        AssertMsgFailed(("Invalid pDir=%p\n", pDir));
+        return VERR_INVALID_PARAMETER;
+    }
+
+    /*
+     * Close the handle.
+     */
+    pDir->u32Magic = ~RTDIR_MAGIC;
+    if (pDir->hDir != MY_INVALID_HANDLE_VALUE)
+    {
+        int rc = rtNtPathClose(pDir->hDir);
+        AssertRC(rc);
+        pDir->hDir = MY_INVALID_HANDLE_VALUE;
+    }
+    RTStrFree(pDir->pszName);
+    pDir->pszName = NULL;
+    RTUtf16Free(pDir->NtFilterStr.Buffer);
+    pDir->NtFilterStr.Buffer = NULL;
+    RTMemFree(pDir->pabBuffer);
+    pDir->pabBuffer = NULL;
+    RTMemFree(pDir);
+
+    return VINF_SUCCESS;
+}
+
+
+/**
+ * Checks the validity of the current record.
+ *
+ * @returns IPRT status code
+ * @param   pThis       The directory instance data.
+ */
+static int rtDirNtCheckRecord(PRTDIR pThis)
+{
+#ifdef RTDIR_NT_STRICT
+# ifdef IPRT_WITH_NT_PATH_PASSTHRU
+    if (pThis->enmInfoClass != FileMaximumInformation)
+# endif
+    {
+        uintptr_t uEndAddr;
+        if (pThis->enmInfoClass == FileIdBothDirectoryInformation)
+            uEndAddr = (uintptr_t)&pThis->uCurData.pBothId->FileName[0];
+        else
+            uEndAddr = (uintptr_t)&pThis->uCurData.pBoth->FileName[0];
+        AssertReturn(uEndAddr < (uintptr_t)&pThis->pabBuffer[pThis->cbBuffer], VERR_IO_GEN_FAILURE);
+
+        AssertReturn(pThis->uCurData.pBoth->FileNameLength < _64K, VERR_FILENAME_TOO_LONG);
+        AssertReturn((pThis->uCurData.pBoth->FileNameLength & 1) == 0, VERR_IO_GEN_FAILURE);
+
+        uEndAddr += pThis->uCurData.pBoth->FileNameLength;
+        AssertReturn(uEndAddr <= (uintptr_t)&pThis->pabBuffer[pThis->cbBuffer], VERR_IO_GEN_FAILURE);
+
+        AssertReturn((unsigned)pThis->uCurData.pBoth->ShortNameLength <= sizeof(pThis->uCurData.pBoth->ShortName),
+                     VERR_IO_GEN_FAILURE);
+    }
+#endif
+
+    return VINF_SUCCESS;
+}
+
+
+/**
+ * Advances the buffer pointer.
+ *
+ * @param   pThis       The directory instance data.
+ */
+static int rtDirNtAdvanceBuffer(PRTDIR pThis)
+{
+    int rc;
+
+#ifdef IPRT_WITH_NT_PATH_PASSTHRU
+    if (pThis->enmInfoClass == FileMaximumInformation)
+    {
+        pThis->uCurData.pObjDir++;
+        pThis->fDataUnread = pThis->uCurData.pObjDir->Name.Length != 0;
+        return VINF_SUCCESS;
+    }
+#endif
+
+    pThis->fDataUnread = false;
+
+    uint32_t const offNext = pThis->uCurData.pBoth->NextEntryOffset;
+    if (offNext == 0)
+        return VINF_SUCCESS;
+
+#ifdef RTDIR_NT_STRICT
+    /* Make sure the next-record offset is beyond the current record. */
+    size_t cbRec;
+    if (pThis->enmInfoClass == FileIdBothDirectoryInformation)
+        cbRec = RT_UOFFSETOF(FILE_ID_BOTH_DIR_INFORMATION, FileName);
+    else
+        cbRec = RT_UOFFSETOF(FILE_BOTH_DIR_INFORMATION, FileName);
+    cbRec += pThis->uCurData.pBoth->FileNameLength;
+    AssertReturn(offNext >= cbRec, VERR_IO_GEN_FAILURE);
+#endif
+    pThis->uCurData.u += offNext;
+
+    rc = rtDirNtCheckRecord(pThis);
+    pThis->fDataUnread = RT_SUCCESS(rc);
+    return rc;
+}
+
+
+/**
+ * Fetches more data from the file system.
+ *
+ * @returns IPRT status code
+ * @param   pThis       The directory instance data.
+ */
+static int rtDirNtFetchMore(PRTDIR pThis)
+{
+    Assert(!pThis->fDataUnread);
+
+    /*
+     * Allocate the buffer the first time around.
+     * We do this in lazy fashion as some users of RTDirOpen will not actually
+     * list any files, just open it for various reasons.
+     */
+    bool fFirst = false;
+    if (!pThis->pabBuffer)
+    {
+        fFirst = false;
+        pThis->cbBufferAlloc = _256K;
+        pThis->pabBuffer = (uint8_t *)RTMemAlloc(pThis->cbBufferAlloc);
+        if (!pThis->pabBuffer)
+        {
+            do
+            {
+                pThis->cbBufferAlloc /= 4;
+                pThis->pabBuffer = (uint8_t *)RTMemAlloc(pThis->cbBufferAlloc);
+            } while (pThis->pabBuffer == NULL && pThis->cbBufferAlloc > _4K);
+            if (!pThis->pabBuffer)
+                return VERR_NO_MEMORY;
+        }
+    }
+
+    /*
+     * Read more.
+     */
+    NTSTATUS rcNt;
+    IO_STATUS_BLOCK Ios = MY_IO_STATUS_BLOCK_INITIALIZER;
+    if (pThis->enmInfoClass != (FILE_INFORMATION_CLASS)0)
+    {
+#ifdef IPRT_WITH_NT_PATH_PASSTHRU
+        if (pThis->enmInfoClass == FileMaximumInformation)
+        {
+            Ios.Information = 0;
+            Ios.Status = rcNt = NtQueryDirectoryObject(pThis->hDir,
+                                                       pThis->pabBuffer,
+                                                       pThis->cbBufferAlloc,
+                                                       RTDIR_NT_SINGLE_RECORD /*ReturnSingleEntry */,
+                                                       FALSE /*RestartScan*/,
+                                                       &pThis->uObjDirCtx,
+                                                       (PULONG)&Ios.Information);
+        }
+        else
+#endif
+            rcNt = NtQueryDirectoryFile(pThis->hDir,
+                                        NULL /* Event */,
+                                        NULL /* ApcRoutine */,
+                                        NULL /* ApcContext */,
+                                        &Ios,
+                                        pThis->pabBuffer,
+                                        pThis->cbBufferAlloc,
+                                        pThis->enmInfoClass,
+                                        RTDIR_NT_SINGLE_RECORD /*ReturnSingleEntry */,
+                                        pThis->pNtFilterStr,
+                                        FALSE /*RestartScan */);
+    }
+    else
+    {
+        /*
+         * The first time around we have figure which info class we can use.
+         * We prefer one which gives us file IDs, but we'll settle for less.
+         */
+        pThis->enmInfoClass = FileIdBothDirectoryInformation;
+        rcNt = NtQueryDirectoryFile(pThis->hDir,
+                                    NULL /* Event */,
+                                    NULL /* ApcRoutine */,
+                                    NULL /* ApcContext */,
+                                    &Ios,
+                                    pThis->pabBuffer,
+                                    pThis->cbBufferAlloc,
+                                    pThis->enmInfoClass,
+                                    RTDIR_NT_SINGLE_RECORD /*ReturnSingleEntry */,
+                                    pThis->pNtFilterStr,
+                                    FALSE /*RestartScan */);
+        if (!NT_SUCCESS(rcNt))
+        {
+            pThis->enmInfoClass = FileBothDirectoryInformation;
+            rcNt = NtQueryDirectoryFile(pThis->hDir,
+                                        NULL /* Event */,
+                                        NULL /* ApcRoutine */,
+                                        NULL /* ApcContext */,
+                                        &Ios,
+                                        pThis->pabBuffer,
+                                        pThis->cbBufferAlloc,
+                                        pThis->enmInfoClass,
+                                        RTDIR_NT_SINGLE_RECORD /*ReturnSingleEntry */,
+                                        pThis->pNtFilterStr,
+                                        FALSE /*RestartScan */);
+        }
+    }
+    if (!NT_SUCCESS(rcNt))
+    {
+        if (rcNt == STATUS_NO_MORE_FILES || rcNt == STATUS_NO_MORE_ENTRIES)
+            return VERR_NO_MORE_FILES;
+        return RTErrConvertFromNtStatus(rcNt);
+    }
+    Assert(Ios.Information > sizeof(*pThis->uCurData.pBoth));
+
+    /*
+     * Set up the data members.
+     */
+    pThis->uCurData.u  = (uintptr_t)pThis->pabBuffer;
+    pThis->cbBuffer    = Ios.Information;
+
+    int rc = rtDirNtCheckRecord(pThis);
+    pThis->fDataUnread = RT_SUCCESS(rc);
+
+    return rc;
+}
+
+
+/**
+ * Converts the name from UTF-16 to UTF-8.
+ *
+ * Fortunately, the names are relative to the directory, so we won't have to do
+ * any sweaty path style coversion. :-)
+ *
+ * @returns IPRT status code
+ * @param   pThis       The directory instance data.
+ * @param   cbName      The file name length in bytes.
+ * @param   pwsName     The file name, not terminated.
+ */
+static int rtDirNtConvertName(PRTDIR pThis, uint32_t cbName, PCRTUTF16 pwsName)
+{
+    int rc = RTUtf16ToUtf8Ex(pwsName, cbName / 2, &pThis->pszName, pThis->cbNameAlloc, &pThis->cchName);
+    if (RT_SUCCESS(rc))
+    {
+        if (!pThis->cbNameAlloc)
+            pThis->cbNameAlloc = pThis->cchName + 1;
+    }
+    else if (rc == VERR_BUFFER_OVERFLOW)
+    {
+        RTStrFree(pThis->pszName);
+        pThis->pszName = NULL;
+        pThis->cbNameAlloc = 0;
+
+        rc = RTUtf16ToUtf8Ex(pwsName, cbName / 2, &pThis->pszName, pThis->cbNameAlloc, &pThis->cchName);
+        if (RT_SUCCESS(rc))
+            pThis->cbNameAlloc = pThis->cchName + 1;
+    }
+    Assert(RT_SUCCESS(rc) ? pThis->pszName != NULL : pThis->pszName == NULL);
+    return rc;
+}
+
+
+/**
+ * Converts the name of the current record.
+ *
+ * @returns IPRT status code.
+ * @param   pThis       The directory instance data.
+ */
+static int rtDirNtConvertCurName(PRTDIR pThis)
+{
+    switch (pThis->enmInfoClass)
+    {
+        case FileIdBothDirectoryInformation:
+            return rtDirNtConvertName(pThis, pThis->uCurData.pBothId->FileNameLength, pThis->uCurData.pBothId->FileName);
+        case FileBothDirectoryInformation:
+            return rtDirNtConvertName(pThis, pThis->uCurData.pBoth->FileNameLength, pThis->uCurData.pBoth->FileName);
+#ifdef IPRT_WITH_NT_PATH_PASSTHRU
+        case FileMaximumInformation:
+            return rtDirNtConvertName(pThis, pThis->uCurData.pObjDir->Name.Length, pThis->uCurData.pObjDir->Name.Buffer);
+#endif
+
+        default:
+            AssertFailedReturn(VERR_INTERNAL_ERROR_3);
+    }
+}
+
+
+RTDECL(int) RTDirRead(PRTDIR pDir, PRTDIRENTRY pDirEntry, size_t *pcbDirEntry)
+{
+    int rc;
+
+    /*
+     * Validate input.
+     */
+    AssertPtrReturn(pDir, VERR_INVALID_POINTER);
+    AssertReturn(pDir->u32Magic == RTDIR_MAGIC, VERR_INVALID_HANDLE);
+    AssertPtrReturn(pDirEntry, VERR_INVALID_POINTER);
+    size_t cbDirEntry = sizeof(*pDirEntry);
+    if (pcbDirEntry)
+    {
+        cbDirEntry = *pcbDirEntry;
+        AssertMsgReturn(cbDirEntry >= RT_UOFFSETOF(RTDIRENTRY, szName[2]),
+                        ("Invalid *pcbDirEntry=%d (min %d)\n", *pcbDirEntry, RT_OFFSETOF(RTDIRENTRY, szName[2])),
+                        VERR_INVALID_PARAMETER);
+    }
+
+    /*
+     * Fetch data?
+     */
+    if (!pDir->fDataUnread)
+    {
+        rc = rtDirNtFetchMore(pDir);
+        if (RT_FAILURE(rc))
+            return rc;
+    }
+
+    /*
+     * Convert the filename to UTF-8.
+     */
+    rc = rtDirNtConvertCurName(pDir);
+    if (RT_FAILURE(rc))
+        return rc;
+
+    /*
+     * Check if we've got enough space to return the data.
+     */
+    const char  *pszName    = pDir->pszName;
+    const size_t cchName    = pDir->cchName;
+    const size_t cbRequired = RT_OFFSETOF(RTDIRENTRY, szName[1]) + cchName;
+    if (pcbDirEntry)
+        *pcbDirEntry = cbRequired;
+    if (cbRequired > cbDirEntry)
+        return VERR_BUFFER_OVERFLOW;
+
+    /*
+     * Setup the returned data.
+     */
+    pDirEntry->cbName = (uint16_t)cchName; Assert(pDirEntry->cbName == cchName);
+    memcpy(pDirEntry->szName, pszName, cchName + 1);
+
+    pDirEntry->INodeId = pDir->enmInfoClass == FileIdBothDirectoryInformation
+                       ? pDir->uCurData.pBothId->FileId.QuadPart : 0;
+
+#ifdef IPRT_WITH_NT_PATH_PASSTHRU
+    if (pDir->enmInfoClass != FileMaximumInformation)
+#endif
+    {
+        switch (   pDir->uCurData.pBoth->FileAttributes
+                & (FILE_ATTRIBUTE_REPARSE_POINT | FILE_ATTRIBUTE_REPARSE_POINT | FILE_ATTRIBUTE_DIRECTORY))
+        {
+            default:
+                AssertFailed();
+            case 0:
+                pDirEntry->enmType = RTDIRENTRYTYPE_FILE;
+                break;
+
+            case FILE_ATTRIBUTE_DIRECTORY:
+                pDirEntry->enmType = RTDIRENTRYTYPE_DIRECTORY;
+                break;
+
+            case FILE_ATTRIBUTE_REPARSE_POINT:
+            case FILE_ATTRIBUTE_REPARSE_POINT | FILE_ATTRIBUTE_DIRECTORY:
+                pDirEntry->enmType = RTDIRENTRYTYPE_SYMLINK;
+                break;
+        }
+    }
+#ifdef IPRT_WITH_NT_PATH_PASSTHRU
+    else
+    {
+        pDirEntry->enmType = RTDIRENTRYTYPE_UNKNOWN;
+        if (rtNtCompWideStrAndAscii(pDir->uCurData.pObjDir->TypeName.Buffer, pDir->uCurData.pObjDir->TypeName.Length,
+                                    RT_STR_TUPLE("Directory")))
+            pDirEntry->enmType = RTDIRENTRYTYPE_DIRECTORY;
+        else if (rtNtCompWideStrAndAscii(pDir->uCurData.pObjDir->TypeName.Buffer, pDir->uCurData.pObjDir->TypeName.Length,
+                                         RT_STR_TUPLE("SymbolicLink")))
+            pDirEntry->enmType = RTDIRENTRYTYPE_SYMLINK;
+    }
+#endif
+
+    return rtDirNtAdvanceBuffer(pDir);
+}
+
+
+RTDECL(int) RTDirReadEx(PRTDIR pDir, PRTDIRENTRYEX pDirEntry, size_t *pcbDirEntry,
+                        RTFSOBJATTRADD enmAdditionalAttribs, uint32_t fFlags)
+{
+    int rc;
+
+    /*
+     * Validate input.
+     */
+    AssertPtrReturn(pDir, VERR_INVALID_POINTER);
+    AssertReturn(pDir->u32Magic == RTDIR_MAGIC, VERR_INVALID_HANDLE);
+    AssertPtrReturn(pDirEntry, VERR_INVALID_POINTER);
+
+    AssertReturn(enmAdditionalAttribs >= RTFSOBJATTRADD_NOTHING && enmAdditionalAttribs <= RTFSOBJATTRADD_LAST,
+                 VERR_INVALID_PARAMETER);
+    AssertMsgReturn(RTPATH_F_IS_VALID(fFlags, 0), ("%#x\n", fFlags), VERR_INVALID_PARAMETER);
+
+    size_t cbDirEntry = sizeof(*pDirEntry);
+    if (pcbDirEntry)
+    {
+        cbDirEntry = *pcbDirEntry;
+        AssertMsgReturn(cbDirEntry >= RT_UOFFSETOF(RTDIRENTRYEX, szName[2]),
+                        ("Invalid *pcbDirEntry=%d (min %d)\n", *pcbDirEntry, RT_OFFSETOF(RTDIRENTRYEX, szName[2])),
+                        VERR_INVALID_PARAMETER);
+    }
+
+    /*
+     * Fetch data?
+     */
+    if (!pDir->fDataUnread)
+    {
+        rc = rtDirNtFetchMore(pDir);
+        if (RT_FAILURE(rc))
+            return rc;
+    }
+
+    /*
+     * Convert the filename to UTF-8.
+     */
+    rc = rtDirNtConvertCurName(pDir);
+    if (RT_FAILURE(rc))
+        return rc;
+
+    /*
+     * Check if we've got enough space to return the data.
+     */
+    const char  *pszName    = pDir->pszName;
+    const size_t cchName    = pDir->cchName;
+    const size_t cbRequired = RT_OFFSETOF(RTDIRENTRYEX, szName[1]) + cchName;
+    if (pcbDirEntry)
+        *pcbDirEntry = cbRequired;
+    if (cbRequired > cbDirEntry)
+        return VERR_BUFFER_OVERFLOW;
+
+    /*
+     * Setup the returned data.
+     */
+    PFILE_BOTH_DIR_INFORMATION pBoth = pDir->uCurData.pBoth;
+
+    pDirEntry->cbName  = (uint16_t)cchName;  Assert(pDirEntry->cbName == cchName);
+    memcpy(pDirEntry->szName, pszName, cchName + 1);
+    memset(pDirEntry->wszShortName, 0, sizeof(pDirEntry->wszShortName));
+#ifdef IPRT_WITH_NT_PATH_PASSTHRU
+    if (pDir->enmInfoClass != FileMaximumInformation)
+#endif
+    {
+        uint8_t cbShort = pBoth->ShortNameLength;
+        if (cbShort > 0)
+        {
+            AssertStmt(cbShort < sizeof(pDirEntry->wszShortName), cbShort = sizeof(pDirEntry->wszShortName) - 2);
+            memcpy(pDirEntry->wszShortName, pBoth->ShortName, cbShort);
+            pDirEntry->cwcShortName = cbShort / 2;
+        }
+        else
+            pDirEntry->cwcShortName = 0;
+
+        pDirEntry->Info.cbObject    = pBoth->EndOfFile.QuadPart;
+        pDirEntry->Info.cbAllocated = pBoth->AllocationSize.QuadPart;
+
+        Assert(sizeof(uint64_t) == sizeof(pBoth->CreationTime));
+        RTTimeSpecSetNtTime(&pDirEntry->Info.BirthTime,         pBoth->CreationTime.QuadPart);
+        RTTimeSpecSetNtTime(&pDirEntry->Info.AccessTime,        pBoth->LastAccessTime.QuadPart);
+        RTTimeSpecSetNtTime(&pDirEntry->Info.ModificationTime,  pBoth->LastWriteTime.QuadPart);
+        RTTimeSpecSetNtTime(&pDirEntry->Info.ChangeTime,        pBoth->ChangeTime.QuadPart);
+
+        pDirEntry->Info.Attr.fMode  = rtFsModeFromDos((pBoth->FileAttributes << RTFS_DOS_SHIFT) & RTFS_DOS_MASK_NT,
+                                                       pszName, cchName);
+    }
+#ifdef IPRT_WITH_NT_PATH_PASSTHRU
+    else
+    {
+        pDirEntry->cwcShortName = 0;
+        pDirEntry->Info.cbObject    = 0;
+        pDirEntry->Info.cbAllocated = 0;
+        RTTimeSpecSetNtTime(&pDirEntry->Info.BirthTime,         0);
+        RTTimeSpecSetNtTime(&pDirEntry->Info.AccessTime,        0);
+        RTTimeSpecSetNtTime(&pDirEntry->Info.ModificationTime,  0);
+        RTTimeSpecSetNtTime(&pDirEntry->Info.ChangeTime,        0);
+
+        if (rtNtCompWideStrAndAscii(pDir->uCurData.pObjDir->TypeName.Buffer, pDir->uCurData.pObjDir->TypeName.Length,
+                                    RT_STR_TUPLE("Directory")))
+            pDirEntry->Info.Attr.fMode = RTFS_DOS_DIRECTORY | RTFS_TYPE_DIRECTORY | 0777;
+        else if (rtNtCompWideStrAndAscii(pDir->uCurData.pObjDir->TypeName.Buffer, pDir->uCurData.pObjDir->TypeName.Length,
+                                         RT_STR_TUPLE("SymbolicLink")))
+            pDirEntry->Info.Attr.fMode = RTFS_DOS_NT_REPARSE_POINT | RTFS_TYPE_SYMLINK | 0777;
+        else if (rtNtCompWideStrAndAscii(pDir->uCurData.pObjDir->TypeName.Buffer, pDir->uCurData.pObjDir->TypeName.Length,
+                                         RT_STR_TUPLE("Device")))
+            pDirEntry->Info.Attr.fMode = RTFS_DOS_NT_DEVICE | RTFS_TYPE_DEV_CHAR | 0666;
+        else
+            pDirEntry->Info.Attr.fMode = RTFS_DOS_NT_NORMAL | RTFS_TYPE_FILE | 0666;
+    }
+#endif
+
+    /*
+     * Requested attributes (we cannot provide anything actually).
+     */
+    switch (enmAdditionalAttribs)
+    {
+        case RTFSOBJATTRADD_EASIZE:
+            pDirEntry->Info.Attr.enmAdditional          = RTFSOBJATTRADD_EASIZE;
+#ifdef IPRT_WITH_NT_PATH_PASSTHRU
+            if (pDir->enmInfoClass == FileMaximumInformation)
+                pDirEntry->Info.Attr.u.EASize.cb        = 0;
+            else
+#endif
+                pDirEntry->Info.Attr.u.EASize.cb        = pBoth->EaSize;
+            break;
+
+        case RTFSOBJATTRADD_UNIX:
+            pDirEntry->Info.Attr.enmAdditional          = RTFSOBJATTRADD_UNIX;
+            pDirEntry->Info.Attr.u.Unix.uid             = ~0U;
+            pDirEntry->Info.Attr.u.Unix.gid             = ~0U;
+            pDirEntry->Info.Attr.u.Unix.cHardlinks      = 1;
+            pDirEntry->Info.Attr.u.Unix.INodeIdDevice   = 0; /** @todo Use the volume serial number (see GetFileInformationByHandle). */
+            pDirEntry->Info.Attr.u.Unix.INodeId         = 0; /** @todo Use the fileid (see GetFileInformationByHandle). */
+            pDirEntry->Info.Attr.u.Unix.fFlags          = 0;
+            pDirEntry->Info.Attr.u.Unix.GenerationId    = 0;
+            pDirEntry->Info.Attr.u.Unix.Device          = 0;
+            break;
+
+        case RTFSOBJATTRADD_NOTHING:
+            pDirEntry->Info.Attr.enmAdditional          = RTFSOBJATTRADD_NOTHING;
+            break;
+
+        case RTFSOBJATTRADD_UNIX_OWNER:
+            pDirEntry->Info.Attr.enmAdditional          = RTFSOBJATTRADD_UNIX_OWNER;
+            pDirEntry->Info.Attr.u.UnixOwner.uid        = ~0U;
+            pDirEntry->Info.Attr.u.UnixOwner.szName[0]  = '\0'; /** @todo return something sensible here. */
+            break;
+
+        case RTFSOBJATTRADD_UNIX_GROUP:
+            pDirEntry->Info.Attr.enmAdditional          = RTFSOBJATTRADD_UNIX_GROUP;
+            pDirEntry->Info.Attr.u.UnixGroup.gid        = ~0U;
+            pDirEntry->Info.Attr.u.UnixGroup.szName[0]  = '\0';
+            break;
+
+        default:
+            AssertMsgFailed(("Impossible!\n"));
+            return VERR_INTERNAL_ERROR;
+    }
+
+    /*
+     * Follow links if requested.
+     */
+    if (   (fFlags & RTPATH_F_FOLLOW_LINK)
+        && RTFS_IS_SYMLINK(fFlags))
+    {
+        /** @todo Symlinks: Find[First|Next]FileW will return info about
+            the link, so RTPATH_F_FOLLOW_LINK is not handled correctly. */
+    }
+
+    /*
+     * Finally advance the buffer.
+     */
+    return rtDirNtAdvanceBuffer(pDir);
+}
+