summaryrefslogtreecommitdiffstats
path: root/src/VBox/Runtime/r3/nt/dirrel-r3-nt.cpp
blob: a4130725c1082aae4ec174a70c8eb52eedbbda7d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
/* $Id: dirrel-r3-nt.cpp $ */
/** @file
 * IPRT - Directory relative base APIs, NT implementation
 */

/*
 * Copyright (C) 2006-2023 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                                                                                                                 *
*********************************************************************************************************************************/
#define LOG_GROUP RTLOGGROUP_DIR
#include <iprt/dir.h>
#include "internal-r3-nt.h"

#include <iprt/assert.h>
#include <iprt/file.h>
#include <iprt/err.h>
#include <iprt/path.h>
#include <iprt/string.h>
#include <iprt/symlink.h>
#include <iprt/utf16.h>
#include "internal/dir.h"
#include "internal/file.h"
#include "internal/fs.h"
#include "internal/path.h"


/*********************************************************************************************************************************
*   Defined Constants And Macros                                                                                                 *
*********************************************************************************************************************************/
/** Getst the RTNTPATHRELATIVEASCENT value for RTNtPathRelativeFromUtf8. */
#define RTDIRREL_NT_GET_ASCENT(a_pThis) \
    ( !(pThis->fFlags & RTDIR_F_DENY_ASCENT) ? kRTNtPathRelativeAscent_Allow : kRTNtPathRelativeAscent_Fail )



/**
 * Helper that builds a full path for a directory relative path.
 *
 * @returns IPRT status code.
 * @param   pThis               The directory.
 * @param   pszPathDst          The destination buffer.
 * @param   cbPathDst           The size of the destination buffer.
 * @param   pszRelPath          The relative path.
 */
static int rtDirRelBuildFullPath(PRTDIRINTERNAL pThis, char *pszPathDst, size_t cbPathDst, const char *pszRelPath)
{
    AssertMsgReturn(!RTPathStartsWithRoot(pszRelPath), ("pszRelPath='%s'\n", pszRelPath), VERR_PATH_IS_NOT_RELATIVE);

    /*
     * Let's hope we can avoid checking for ascension.
     *
     * Note! We don't take symbolic links into account here.  That can be
     *       done later if desired.
     */
    if (   !(pThis->fFlags & RTDIR_F_DENY_ASCENT)
        || strstr(pszRelPath, "..") == NULL)
    {
        size_t const cchRelPath = strlen(pszRelPath);
        size_t const cchDirPath = pThis->cchPath;
        if (cchDirPath + cchRelPath < cbPathDst)
        {
            memcpy(pszPathDst, pThis->pszPath, cchDirPath);
            memcpy(&pszPathDst[cchDirPath], pszRelPath, cchRelPath);
            pszPathDst[cchDirPath + cchRelPath] = '\0';
            return VINF_SUCCESS;
        }
        return VERR_FILENAME_TOO_LONG;
    }

    /*
     * Calc the absolute path using the directory as a base, then check if the result
     * still starts with the full directory path.
     *
     * This ASSUMES that pThis->pszPath is an absolute path.
     */
    int rc = RTPathAbsEx(pThis->pszPath, pszRelPath, RTPATH_STR_F_STYLE_HOST, pszPathDst, &cbPathDst);
    if (RT_SUCCESS(rc))
    {
        if (RTPathStartsWith(pszPathDst, pThis->pszPath))
            return VINF_SUCCESS;
        return VERR_PATH_NOT_FOUND;
    }
    return rc;
}


/*
 *
 *
 * RTFile stuff.
 * RTFile stuff.
 * RTFile stuff.
 *
 *
 */


RTDECL(int)  RTDirRelFileOpen(RTDIR hDir, const char *pszRelFilename, uint64_t fOpen, PRTFILE phFile)
{
    PRTDIRINTERNAL pThis = hDir;
    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
    AssertReturn(pThis->u32Magic == RTDIR_MAGIC, VERR_INVALID_HANDLE);

    /*
     * Validate and convert flags.
     */
    uint32_t    fDesiredAccess;
    uint32_t    fObjAttribs;
    uint32_t    fFileAttribs;
    uint32_t    fShareAccess;
    uint32_t    fCreateDisposition;
    uint32_t    fCreateOptions;
    int rc = rtFileNtValidateAndConvertFlags(fOpen, &fDesiredAccess, &fObjAttribs, &fFileAttribs,
                                             &fShareAccess, &fCreateDisposition, &fCreateOptions);
    if (RT_SUCCESS(rc))
    {
        /*
         * Convert and normalize the path.
         */
        UNICODE_STRING NtName;
        HANDLE hRoot = pThis->hDir;
        rc = RTNtPathRelativeFromUtf8(&NtName, &hRoot, pszRelFilename, RTDIRREL_NT_GET_ASCENT(pThis),
                                      pThis->enmInfoClass == FileMaximumInformation);
        if (RT_SUCCESS(rc))
        {
            HANDLE              hFile = RTNT_INVALID_HANDLE_VALUE;
            IO_STATUS_BLOCK     Ios   = RTNT_IO_STATUS_BLOCK_INITIALIZER;
            OBJECT_ATTRIBUTES   ObjAttr;
            InitializeObjectAttributes(&ObjAttr, &NtName, fObjAttribs, hRoot, NULL /*pSecDesc*/);

            NTSTATUS rcNt = NtCreateFile(&hFile,
                                         fDesiredAccess,
                                         &ObjAttr,
                                         &Ios,
                                         NULL /* AllocationSize*/,
                                         fFileAttribs,
                                         fShareAccess,
                                         fCreateDisposition,
                                         fCreateOptions,
                                         NULL /*EaBuffer*/,
                                         0 /*EaLength*/);
            if (NT_SUCCESS(rcNt))
            {
                rc = RTFileFromNative(phFile, (uintptr_t)hFile);
                if (RT_FAILURE(rc))
                    NtClose(hFile);
            }
            else
                rc = RTErrConvertFromNtStatus(rcNt);
            RTNtPathFree(&NtName, NULL);
        }
    }
    return rc;
}



/*
 *
 *
 * RTDir stuff.
 * RTDir stuff.
 * RTDir stuff.
 *
 *
 */


/**
 * Helper for cooking up a path string for rtDirOpenRelativeOrHandle.
 *
 * @returns IPRT status code.
 * @param   pszDst              The destination buffer.
 * @param   cbDst               The size of the destination buffer.
 * @param   pThis               The directory this is relative to.
 * @param   pNtPath             The NT path with a possibly relative path.
 * @param   fRelative           Whether @a pNtPath is relative or not.
 * @param   pszPath             The input path.
 */
static int rtDirRelJoinPathForDirOpen(char *pszDst, size_t cbDst, PRTDIRINTERNAL pThis,
                                      PUNICODE_STRING pNtPath, bool fRelative, const char *pszPath)
{
    int rc;
    if (fRelative)
    {
        size_t cchRel = 0;
        rc = RTUtf16CalcUtf8LenEx(pNtPath->Buffer, pNtPath->Length / sizeof(RTUTF16), &cchRel);
        AssertRC(rc);
        if (RT_SUCCESS(rc))
        {
            if (pThis->cchPath + cchRel < cbDst)
            {
                size_t cchBase = pThis->cchPath;
                memcpy(pszDst, pThis->pszPath, cchBase);
                pszDst += cchBase;
                cbDst  -= cchBase;
                rc = RTUtf16ToUtf8Ex(pNtPath->Buffer, pNtPath->Length / sizeof(RTUTF16), &pszDst, cbDst, NULL);
            }
            else
                rc = VERR_FILENAME_TOO_LONG;
        }
    }
    else
    {
        /** @todo would be better to convert pNtName to DOS/WIN path here,
         *        as it is absolute and doesn't need stuff resolved. */
        rc = RTPathJoin(pszDst, cbDst, pThis->pszPath, pszPath);
    }
    return rc;
}

RTDECL(int) RTDirRelDirOpen(RTDIR hDir, const char *pszDir, RTDIR *phDir)
{
    return RTDirRelDirOpenFiltered(hDir, pszDir, RTDIRFILTER_NONE, 0 /*fFlags*/, phDir);
}


RTDECL(int) RTDirRelDirOpenFiltered(RTDIR hDir, const char *pszDirAndFilter, RTDIRFILTER enmFilter,
                                    uint32_t fFlags, RTDIR *phDir)
{
    PRTDIRINTERNAL pThis = hDir;
    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
    AssertReturn(pThis->u32Magic == RTDIR_MAGIC, VERR_INVALID_HANDLE);

    /*
     * Convert and normalize the path.
     */
    UNICODE_STRING NtName;
    HANDLE hRoot = pThis->hDir;
    int rc = RTNtPathRelativeFromUtf8(&NtName, &hRoot, pszDirAndFilter, RTDIRREL_NT_GET_ASCENT(pThis),
                                      pThis->enmInfoClass == FileMaximumInformation);
    if (RT_SUCCESS(rc))
    {
        char szAbsDirAndFilter[RTPATH_MAX];
        rc = rtDirRelJoinPathForDirOpen(szAbsDirAndFilter, sizeof(szAbsDirAndFilter), pThis,
                                        &NtName, hRoot != NULL, pszDirAndFilter);
        if (RT_SUCCESS(rc))
        {
            /* Drop the filter from the NT name. */
            switch (enmFilter)
            {
                case RTDIRFILTER_NONE:
                    break;
                case RTDIRFILTER_WINNT:
                case RTDIRFILTER_UNIX:
                case RTDIRFILTER_UNIX_UPCASED:
                {
                    size_t cwc = NtName.Length / sizeof(RTUTF16);
                    while (   cwc > 0
                           && NtName.Buffer[cwc - 1] != '\\')
                        cwc--;
                    NtName.Buffer[cwc] = '\0';
                    NtName.Length = (uint16_t)(cwc * sizeof(RTUTF16));
                    break;
                }
                default:
                    AssertFailedBreak();
            }

            rc = rtDirOpenRelativeOrHandle(phDir, szAbsDirAndFilter, enmFilter, fFlags, (uintptr_t)hRoot, &NtName);
        }
        RTNtPathFree(&NtName, NULL);
    }
    return rc;
}


RTDECL(int) RTDirRelDirCreate(RTDIR hDir, const char *pszRelPath, RTFMODE fMode, uint32_t fCreate, RTDIR *phSubDir)
{
    PRTDIRINTERNAL pThis = hDir;
    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
    AssertReturn(pThis->u32Magic == RTDIR_MAGIC, VERR_INVALID_HANDLE);
    AssertReturn(!(fCreate & ~RTDIRCREATE_FLAGS_VALID_MASK), VERR_INVALID_FLAGS);
    fMode = rtFsModeNormalize(fMode, pszRelPath, 0, RTFS_TYPE_DIRECTORY);
    AssertReturn(rtFsModeIsValidPermissions(fMode), VERR_INVALID_FMODE);
    AssertPtrNullReturn(phSubDir, VERR_INVALID_POINTER);

    /*
     * Convert and normalize the path.
     */
    UNICODE_STRING NtName;
    HANDLE hRoot = pThis->hDir;
    int rc = RTNtPathRelativeFromUtf8(&NtName, &hRoot, pszRelPath, RTDIRREL_NT_GET_ASCENT(pThis),
                                      pThis->enmInfoClass == FileMaximumInformation);
    if (RT_SUCCESS(rc))
    {
        HANDLE              hNewDir = RTNT_INVALID_HANDLE_VALUE;
        IO_STATUS_BLOCK     Ios     = RTNT_IO_STATUS_BLOCK_INITIALIZER;
        OBJECT_ATTRIBUTES   ObjAttr;
        InitializeObjectAttributes(&ObjAttr, &NtName, 0 /*fAttrib*/, hRoot, NULL);

        ULONG fDirAttribs = (fCreate & RTFS_DOS_MASK_NT) >> RTFS_DOS_SHIFT;
        if (!(fCreate & RTDIRCREATE_FLAGS_NOT_CONTENT_INDEXED_DONT_SET))
            fDirAttribs |= FILE_ATTRIBUTE_NOT_CONTENT_INDEXED;
        if (!fDirAttribs)
            fDirAttribs = FILE_ATTRIBUTE_NORMAL;

        NTSTATUS rcNt = NtCreateFile(&hNewDir,
                                     phSubDir
                                     ? FILE_WRITE_ATTRIBUTES | FILE_READ_ATTRIBUTES | FILE_LIST_DIRECTORY | FILE_TRAVERSE | SYNCHRONIZE
                                     : SYNCHRONIZE,
                                     &ObjAttr,
                                     &Ios,
                                     NULL /*AllocationSize*/,
                                     fDirAttribs,
                                     FILE_SHARE_READ | FILE_SHARE_WRITE,
                                     FILE_CREATE,
                                     FILE_DIRECTORY_FILE | FILE_OPEN_FOR_BACKUP_INTENT | FILE_SYNCHRONOUS_IO_NONALERT,
                                     NULL /*EaBuffer*/,
                                     0 /*EaLength*/);

        /* Just in case someone takes offence at FILE_ATTRIBUTE_NOT_CONTENT_INDEXED. */
        if (   (   rcNt == STATUS_INVALID_PARAMETER
                || rcNt == STATUS_INVALID_PARAMETER_7)
            && (fDirAttribs & FILE_ATTRIBUTE_NOT_CONTENT_INDEXED)
            && (fCreate & RTDIRCREATE_FLAGS_NOT_CONTENT_INDEXED_NOT_CRITICAL) )
        {
            fDirAttribs &= ~FILE_ATTRIBUTE_NOT_CONTENT_INDEXED;
            if (!fDirAttribs)
                fDirAttribs = FILE_ATTRIBUTE_NORMAL;
            rcNt = NtCreateFile(&hNewDir,
                                phSubDir
                                ? FILE_WRITE_ATTRIBUTES | FILE_READ_ATTRIBUTES | FILE_LIST_DIRECTORY | FILE_TRAVERSE | SYNCHRONIZE
                                : SYNCHRONIZE,
                                &ObjAttr,
                                &Ios,
                                NULL /*AllocationSize*/,
                                fDirAttribs,
                                FILE_SHARE_READ | FILE_SHARE_WRITE,
                                FILE_CREATE,
                                FILE_DIRECTORY_FILE | FILE_OPEN_FOR_BACKUP_INTENT | FILE_SYNCHRONOUS_IO_NONALERT,
                                NULL /*EaBuffer*/,
                                0 /*EaLength*/);
        }

        if (NT_SUCCESS(rcNt))
        {
            if (!phSubDir)
            {
                NtClose(hNewDir);
                rc = VINF_SUCCESS;
            }
            else
            {
                char szAbsDirAndFilter[RTPATH_MAX];
                rc = rtDirRelJoinPathForDirOpen(szAbsDirAndFilter, sizeof(szAbsDirAndFilter), pThis,
                                                &NtName, hRoot != NULL, pszRelPath);
                if (RT_SUCCESS(rc))
                    rc = rtDirOpenRelativeOrHandle(phSubDir, pszRelPath, RTDIRFILTER_NONE, 0 /*fFlags*/,
                                                   (uintptr_t)hNewDir, NULL /*pvNativeRelative*/);
                if (RT_FAILURE(rc))
                    NtClose(hNewDir);
            }
        }
        else
            rc = RTErrConvertFromNtStatus(rcNt);
        RTNtPathFree(&NtName, NULL);
    }
    return rc;
}


RTDECL(int) RTDirRelDirRemove(RTDIR hDir, const char *pszRelPath)
{
    PRTDIRINTERNAL pThis = hDir;
    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
    AssertReturn(pThis->u32Magic == RTDIR_MAGIC, VERR_INVALID_HANDLE);

    /*
     * Convert and normalize the path.
     */
    UNICODE_STRING NtName;
    HANDLE hRoot = pThis->hDir;
    int rc = RTNtPathRelativeFromUtf8(&NtName, &hRoot, pszRelPath, RTDIRREL_NT_GET_ASCENT(pThis),
                                      pThis->enmInfoClass == FileMaximumInformation);
    if (RT_SUCCESS(rc))
    {
        HANDLE              hSubDir = RTNT_INVALID_HANDLE_VALUE;
        IO_STATUS_BLOCK     Ios     = RTNT_IO_STATUS_BLOCK_INITIALIZER;
        OBJECT_ATTRIBUTES   ObjAttr;
        InitializeObjectAttributes(&ObjAttr, &NtName, 0 /*fAttrib*/, hRoot, NULL);

        NTSTATUS rcNt = NtCreateFile(&hSubDir,
                                     DELETE | SYNCHRONIZE,
                                     &ObjAttr,
                                     &Ios,
                                     NULL /*AllocationSize*/,
                                     FILE_ATTRIBUTE_NORMAL,
                                     FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE,
                                     FILE_OPEN,
                                     FILE_DIRECTORY_FILE | FILE_OPEN_FOR_BACKUP_INTENT | FILE_SYNCHRONOUS_IO_NONALERT | FILE_OPEN_REPARSE_POINT,
                                     NULL /*EaBuffer*/,
                                     0 /*EaLength*/);
        if (NT_SUCCESS(rcNt))
        {
            FILE_DISPOSITION_INFORMATION DispInfo;
            DispInfo.DeleteFile = TRUE;
            RTNT_IO_STATUS_BLOCK_REINIT(&Ios);
            rcNt = NtSetInformationFile(hSubDir, &Ios, &DispInfo, sizeof(DispInfo), FileDispositionInformation);

            NTSTATUS rcNt2 = NtClose(hSubDir);
            if (!NT_SUCCESS(rcNt2) && NT_SUCCESS(rcNt))
                rcNt = rcNt2;
        }

        if (NT_SUCCESS(rcNt))
            rc = VINF_SUCCESS;
        else
            rc = RTErrConvertFromNtStatus(rcNt);

        RTNtPathFree(&NtName, NULL);
    }
    return rc;
}


/*
 *
 * RTPath stuff.
 * RTPath stuff.
 * RTPath stuff.
 *
 *
 */


RTDECL(int) RTDirRelPathQueryInfo(RTDIR hDir, const char *pszRelPath, PRTFSOBJINFO pObjInfo,
                                  RTFSOBJATTRADD enmAddAttr, uint32_t fFlags)
{
    PRTDIRINTERNAL pThis = hDir;
    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
    AssertReturn(pThis->u32Magic == RTDIR_MAGIC, VERR_INVALID_HANDLE);

    /*
     * Validate and convert flags.
     */
    UNICODE_STRING NtName;
    HANDLE hRoot = pThis->hDir;
    int rc = RTNtPathRelativeFromUtf8(&NtName, &hRoot, pszRelPath, RTDIRREL_NT_GET_ASCENT(pThis),
                                      pThis->enmInfoClass == FileMaximumInformation);
    if (RT_SUCCESS(rc))
    {
        if (NtName.Length != 0 || hRoot == NULL)
            rc = rtPathNtQueryInfoWorker(hRoot, &NtName, pObjInfo, enmAddAttr, fFlags, pszRelPath);
        else
            rc = RTDirQueryInfo(hDir, pObjInfo, enmAddAttr);
       RTNtPathFree(&NtName, NULL);
    }
    return rc;
}


RTDECL(int) RTDirRelPathSetMode(RTDIR hDir, const char *pszRelPath, RTFMODE fMode, uint32_t fFlags)
{
    PRTDIRINTERNAL pThis = hDir;
    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
    AssertReturn(pThis->u32Magic == RTDIR_MAGIC, VERR_INVALID_HANDLE);
    fMode = rtFsModeNormalize(fMode, pszRelPath, 0, 0);
    AssertReturn(rtFsModeIsValidPermissions(fMode), VERR_INVALID_FMODE);
    AssertMsgReturn(RTPATH_F_IS_VALID(fFlags, 0), ("%#x\n", fFlags), VERR_INVALID_FLAGS);

    /*
     * Convert and normalize the path.
     */
    UNICODE_STRING NtName;
    HANDLE hRoot = pThis->hDir;
    int rc = RTNtPathRelativeFromUtf8(&NtName, &hRoot, pszRelPath, RTDIRREL_NT_GET_ASCENT(pThis),
                                      pThis->enmInfoClass == FileMaximumInformation);
    if (RT_SUCCESS(rc))
    {
        HANDLE              hSubDir = RTNT_INVALID_HANDLE_VALUE;
        IO_STATUS_BLOCK     Ios     = RTNT_IO_STATUS_BLOCK_INITIALIZER;
        OBJECT_ATTRIBUTES   ObjAttr;
        InitializeObjectAttributes(&ObjAttr, &NtName, 0 /*fAttrib*/, hRoot, NULL);

        ULONG fOpenOptions = FILE_OPEN_FOR_BACKUP_INTENT | FILE_SYNCHRONOUS_IO_NONALERT | FILE_OPEN_REPARSE_POINT;
        if (fFlags & RTPATH_F_ON_LINK)
            fOpenOptions |= FILE_OPEN_REPARSE_POINT;
        NTSTATUS rcNt = NtCreateFile(&hSubDir,
                                     FILE_WRITE_ATTRIBUTES | SYNCHRONIZE,
                                     &ObjAttr,
                                     &Ios,
                                     NULL /*AllocationSize*/,
                                     FILE_ATTRIBUTE_NORMAL,
                                     FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE,
                                     FILE_OPEN,
                                     fOpenOptions,
                                     NULL /*EaBuffer*/,
                                     0 /*EaLength*/);
        if (NT_SUCCESS(rcNt))
        {
            rc = rtNtFileSetModeWorker(hSubDir, fMode);

            rcNt = NtClose(hSubDir);
            if (!NT_SUCCESS(rcNt) && RT_SUCCESS(rc))
                rc = RTErrConvertFromNtStatus(rcNt);
        }
        else
            rc = RTErrConvertFromNtStatus(rcNt);

        RTNtPathFree(&NtName, NULL);
    }
    return rc;
}


RTDECL(int) RTDirRelPathSetTimes(RTDIR hDir, const char *pszRelPath, PCRTTIMESPEC pAccessTime, PCRTTIMESPEC pModificationTime,
                                 PCRTTIMESPEC pChangeTime, PCRTTIMESPEC pBirthTime, uint32_t fFlags)
{
    PRTDIRINTERNAL pThis = hDir;
    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
    AssertReturn(pThis->u32Magic == RTDIR_MAGIC, VERR_INVALID_HANDLE);

    char szPath[RTPATH_MAX];
    int rc = rtDirRelBuildFullPath(pThis, szPath, sizeof(szPath), pszRelPath);
    if (RT_SUCCESS(rc))
        rc = RTPathSetTimesEx(szPath, pAccessTime, pModificationTime, pChangeTime, pBirthTime, fFlags);
    return rc;
}


RTDECL(int) RTDirRelPathSetOwner(RTDIR hDir, const char *pszRelPath, uint32_t uid, uint32_t gid, uint32_t fFlags)
{
    PRTDIRINTERNAL pThis = hDir;
    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
    AssertReturn(pThis->u32Magic == RTDIR_MAGIC, VERR_INVALID_HANDLE);

    char szPath[RTPATH_MAX];
    int rc = rtDirRelBuildFullPath(pThis, szPath, sizeof(szPath), pszRelPath);
    if (RT_SUCCESS(rc))
    {
#ifndef RT_OS_WINDOWS
        rc = RTPathSetOwnerEx(szPath, uid, gid, fFlags);
#else
        rc = VERR_NOT_IMPLEMENTED;
        RT_NOREF(uid, gid, fFlags);
#endif
    }
    return rc;
}


RTDECL(int) RTDirRelPathRename(RTDIR hDirSrc, const char *pszSrc, RTDIR hDirDst, const char *pszDst, unsigned fRename)
{
    PRTDIRINTERNAL pThis = hDirSrc;
    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
    AssertReturn(pThis->u32Magic == RTDIR_MAGIC, VERR_INVALID_HANDLE);

    PRTDIRINTERNAL pThat = hDirDst;
    if (pThat != pThis)
    {
        AssertPtrReturn(pThat, VERR_INVALID_HANDLE);
        AssertReturn(pThat->u32Magic != RTDIR_MAGIC, VERR_INVALID_HANDLE);
    }

    char szSrcPath[RTPATH_MAX];
    int rc = rtDirRelBuildFullPath(pThis, szSrcPath, sizeof(szSrcPath), pszSrc);
    if (RT_SUCCESS(rc))
    {
        char szDstPath[RTPATH_MAX];
        rc = rtDirRelBuildFullPath(pThis, szDstPath, sizeof(szDstPath), pszDst);
        if (RT_SUCCESS(rc))
            rc = RTPathRename(szSrcPath, szDstPath, fRename);
    }
    return rc;
}


RTDECL(int) RTDirRelPathUnlink(RTDIR hDir, const char *pszRelPath, uint32_t fUnlink)
{
    PRTDIRINTERNAL pThis = hDir;
    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
    AssertReturn(pThis->u32Magic == RTDIR_MAGIC, VERR_INVALID_HANDLE);

    char szPath[RTPATH_MAX];
    int rc = rtDirRelBuildFullPath(pThis, szPath, sizeof(szPath), pszRelPath);
    if (RT_SUCCESS(rc))
        rc = RTPathUnlink(szPath, fUnlink);
    return rc;
}


/*
 *
 * RTSymlink stuff.
 * RTSymlink stuff.
 * RTSymlink stuff.
 *
 *
 */


RTDECL(int) RTDirRelSymlinkCreate(RTDIR hDir, const char *pszSymlink, const char *pszTarget,
                                  RTSYMLINKTYPE enmType, uint32_t fCreate)
{
    PRTDIRINTERNAL pThis = hDir;
    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
    AssertReturn(pThis->u32Magic == RTDIR_MAGIC, VERR_INVALID_HANDLE);

    char szPath[RTPATH_MAX];
    int rc = rtDirRelBuildFullPath(pThis, szPath, sizeof(szPath), pszSymlink);
    if (RT_SUCCESS(rc))
        rc = RTSymlinkCreate(szPath, pszTarget, enmType, fCreate);
    return rc;
}


RTDECL(int) RTDirRelSymlinkRead(RTDIR hDir, const char *pszSymlink, char *pszTarget, size_t cbTarget, uint32_t fRead)
{
    PRTDIRINTERNAL pThis = hDir;
    AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
    AssertReturn(pThis->u32Magic == RTDIR_MAGIC, VERR_INVALID_HANDLE);

    char szPath[RTPATH_MAX];
    int rc = rtDirRelBuildFullPath(pThis, szPath, sizeof(szPath), pszSymlink);
    if (RT_SUCCESS(rc))
        rc = RTSymlinkRead(szPath, pszTarget, cbTarget, fRead);
    return rc;
}