wimlib.net Git - wimlib/blob - src/win32_apply.c

   1 /*
   2  * win32_apply.c - Windows-specific code for applying files from a WIM image.
   3  */
   4
   5 /*
   6  * Copyright (C) 2013 Eric Biggers
   7  *
   8  * This file is part of wimlib, a library for working with WIM files.
   9  *
  10  * wimlib is free software; you can redistribute it and/or modify it under the
  11  * terms of the GNU General Public License as published by the Free
  12  * Software Foundation; either version 3 of the License, or (at your option)
  13  * any later version.
  14  *
  15  * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
  16  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  17  * A PARTICULAR PURPOSE. See the GNU General Public License for more
  18  * details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with wimlib; if not, see http://www.gnu.org/licenses/.
  22  */
  23
  24 #ifdef __WIN32__
  25
  26 #ifdef HAVE_CONFIG_H
  27 #  include "config.h"
  28 #endif
  29
  30 #include "wimlib/win32_common.h"
  31
  32 #include "wimlib/apply.h"
  33 #include "wimlib/error.h"
  34 #include "wimlib/lookup_table.h"
  35
  36 static int
  37 win32_start_extract(const wchar_t *path, struct apply_ctx *ctx)
  38 {
  39         int ret;
  40         unsigned vol_flags;
  41         bool supports_SetFileShortName;
  42
  43         ret = win32_get_vol_flags(path, &vol_flags, &supports_SetFileShortName);
  44         if (ret)
  45                 return ret;
  46
  47         ctx->supported_features.archive_files = 1;
  48         ctx->supported_features.hidden_files = 1;
  49         ctx->supported_features.system_files = 1;
  50
  51         if (vol_flags & FILE_FILE_COMPRESSION)
  52                 ctx->supported_features.compressed_files = 1;
  53
  54         if (vol_flags & FILE_SUPPORTS_ENCRYPTION) {
  55                 ctx->supported_features.encrypted_files = 1;
  56                 ctx->supported_features.encrypted_directories = 1;
  57         }
  58
  59         ctx->supported_features.not_context_indexed_files = 1;
  60
  61         if (vol_flags & FILE_SUPPORTS_SPARSE_FILES)
  62                 ctx->supported_features.sparse_files = 1;
  63
  64         if (vol_flags & FILE_NAMED_STREAMS)
  65                 ctx->supported_features.named_data_streams = 1;
  66
  67         if (vol_flags & FILE_SUPPORTS_HARD_LINKS)
  68                 ctx->supported_features.hard_links = 1;
  69
  70         if (vol_flags & FILE_SUPPORTS_REPARSE_POINTS) {
  71                 ctx->supported_features.reparse_points = 1;
  72                 if (win32func_CreateSymbolicLinkW)
  73                         ctx->supported_features.symlink_reparse_points = 1;
  74         }
  75
  76         if (vol_flags & FILE_PERSISTENT_ACLS)
  77                 ctx->supported_features.security_descriptors = 1;
  78
  79         if (supports_SetFileShortName)
  80                 ctx->supported_features.short_names = 1;
  81         return 0;
  82 }
  83
  84 /* Create a normal file, overwriting one already present.  */
  85 static int
  86 win32_create_file(const wchar_t *path, struct apply_ctx *ctx, u64 *cookie_ret)
  87 {
  88         HANDLE h;
  89         unsigned retry_count = 0;
  90         DWORD dwFlagsAndAttributes = FILE_FLAG_BACKUP_SEMANTICS;
  91
  92 retry:
  93         /* WRITE_OWNER and WRITE_DAC privileges are required for some reason,
  94          * even through we're creating a new file.  */
  95         h = CreateFile(path, WRITE_OWNER | WRITE_DAC, 0, NULL,
  96                        CREATE_ALWAYS, dwFlagsAndAttributes, NULL);
  97         if (h == INVALID_HANDLE_VALUE) {
  98                 /* File couldn't be created.  */
  99                 DWORD err = GetLastError();
 100                 if (err == ERROR_ACCESS_DENIED && retry_count == 0) {
 101
 102                         /* Access denied error for the first time.  Try
 103                          * adjusting file attributes.  */
 104
 105                         /* Get attributes of the existing file.  */
 106                         DWORD attribs = GetFileAttributes(path);
 107                         if (attribs != INVALID_FILE_ATTRIBUTES &&
 108                             (attribs & (FILE_ATTRIBUTE_HIDDEN |
 109                                         FILE_ATTRIBUTE_SYSTEM |
 110                                         FILE_ATTRIBUTE_READONLY)))
 111                         {
 112                                 /* If the existing file has
 113                                  * FILE_ATTRIBUTE_HIDDEN and/or
 114                                  * FILE_ATTRIBUTE_SYSTEM, they must be set in
 115                                  * the call to CreateFile().  This is true even
 116                                  * when FILE_ATTRIBUTE_NORMAL was not specified,
 117                                  * contrary to the MS "documentation".  */
 118                                 dwFlagsAndAttributes |= (attribs &
 119                                                          (FILE_ATTRIBUTE_HIDDEN |
 120                                                           FILE_ATTRIBUTE_SYSTEM));
 121                                 /* If the existing file has
 122                                  * FILE_ATTRIBUTE_READONLY, it must be cleared
 123                                  * before attempting to create a new file over
 124                                  * it.  This is true even when the process has
 125                                  * the SE_RESTORE_NAME privilege and requested
 126                                  * the FILE_FLAG_BACKUP_SEMANTICS flag to
 127                                  * CreateFile().  */
 128                                 if (attribs & FILE_ATTRIBUTE_READONLY) {
 129                                         SetFileAttributes(path,
 130                                                           attribs & ~FILE_ATTRIBUTE_READONLY);
 131                                 }
 132                                 retry_count++;
 133                                 goto retry;
 134                         }
 135                 }
 136                 set_errno_from_win32_error(err);
 137                 return WIMLIB_ERR_OPEN;
 138         }
 139         CloseHandle(h);
 140         return 0;
 141 }
 142
 143 static int
 144 win32_create_directory(const wchar_t *path, struct apply_ctx *ctx,
 145                        u64 *cookie_ret)
 146 {
 147         if (!CreateDirectory(path, NULL))
 148                 if (GetLastError() != ERROR_ALREADY_EXISTS)
 149                         goto error;
 150         return 0;
 151
 152 error:
 153         set_errno_from_GetLastError();
 154         return WIMLIB_ERR_MKDIR;
 155 }
 156
 157 static int
 158 win32_create_hardlink(const wchar_t *oldpath, const wchar_t *newpath,
 159                       struct apply_ctx *ctx)
 160 {
 161         if (!CreateHardLink(newpath, oldpath, NULL)) {
 162                 if (GetLastError() != ERROR_ALREADY_EXISTS)
 163                         goto error;
 164                 if (!DeleteFile(newpath))
 165                         goto error;
 166                 if (!CreateHardLink(newpath, oldpath, NULL))
 167                         goto error;
 168         }
 169         return 0;
 170
 171 error:
 172         set_errno_from_GetLastError();
 173         return WIMLIB_ERR_LINK;
 174 }
 175
 176 static int
 177 win32_create_symlink(const wchar_t *oldpath, const wchar_t *newpath,
 178                      struct apply_ctx *ctx)
 179 {
 180         if (!(*win32func_CreateSymbolicLinkW)(newpath, oldpath, 0)) {
 181                 if (GetLastError() != ERROR_ALREADY_EXISTS)
 182                         goto error;
 183                 if (!DeleteFile(newpath))
 184                         goto error;
 185                 if (!(*win32func_CreateSymbolicLinkW)(newpath, oldpath, 0))
 186                         goto error;
 187         }
 188         return 0;
 189
 190 error:
 191         set_errno_from_GetLastError();
 192         return WIMLIB_ERR_LINK;
 193 }
 194
 195 static int
 196 win32_extract_wim_chunk(const void *buf, size_t len, void *arg)
 197 {
 198         HANDLE h = (HANDLE)arg;
 199         DWORD nbytes_written;
 200
 201         if (unlikely(!WriteFile(h, buf, len, &nbytes_written, NULL)))
 202                 goto error;
 203         if (unlikely(nbytes_written != len))
 204                 goto error;
 205         return 0;
 206
 207 error:
 208         set_errno_from_GetLastError();
 209         return WIMLIB_ERR_WRITE;
 210 }
 211
 212 static int
 213 win32_extract_stream(const wchar_t *path, const wchar_t *stream_name,
 214                      size_t stream_name_nchars,
 215                      struct wim_lookup_table_entry *lte, struct apply_ctx *ctx)
 216 {
 217         DWORD creationDisposition = OPEN_EXISTING;
 218         wchar_t *stream_path = (wchar_t*)path;
 219         HANDLE h;
 220         int ret;
 221
 222         if (stream_name_nchars) {
 223                 creationDisposition = CREATE_ALWAYS;
 224                 stream_path = alloca(sizeof(wchar_t) *
 225                                      (wcslen(path) + 1 +
 226                                       wcslen(stream_name) + 1));
 227                 tsprintf(stream_path, L"%ls:%ls", path, stream_name);
 228         }
 229
 230         h = CreateFile(stream_path, FILE_WRITE_DATA, 0, NULL,
 231                        creationDisposition, FILE_FLAG_BACKUP_SEMANTICS |
 232                                             FILE_FLAG_OPEN_REPARSE_POINT,
 233                        NULL);
 234         if (h == INVALID_HANDLE_VALUE)
 235                 goto error;
 236
 237         ret = 0;
 238         if (!lte)
 239                 goto out_close_handle;
 240         ret = extract_stream(lte, lte->size, win32_extract_wim_chunk, h);
 241 out_close_handle:
 242         if (!CloseHandle(h))
 243                 goto error;
 244         if (ret && !errno)
 245                 errno = -1;
 246         return ret;
 247
 248 error:
 249         set_errno_from_GetLastError();
 250         return WIMLIB_ERR_WRITE;
 251 }
 252
 253 static int
 254 win32_extract_unnamed_stream(file_spec_t file,
 255                              struct wim_lookup_table_entry *lte,
 256                              struct apply_ctx *ctx)
 257 {
 258         return win32_extract_stream(file.path, NULL, 0, lte, ctx);
 259 }
 260
 261 static int
 262 win32_extract_named_stream(file_spec_t file, const wchar_t *stream_name,
 263                            size_t stream_name_nchars,
 264                            struct wim_lookup_table_entry *lte, struct apply_ctx *ctx)
 265 {
 266         return win32_extract_stream(file.path, stream_name,
 267                                     stream_name_nchars, lte, ctx);
 268 }
 269
 270 struct win32_encrypted_extract_ctx {
 271         const struct wim_lookup_table_entry *lte;
 272         u64 offset;
 273 };
 274
 275 static DWORD WINAPI
 276 win32_encrypted_import_cb(unsigned char *data, void *_import_ctx,
 277                           unsigned long *len_p)
 278 {
 279         struct win32_encrypted_extract_ctx *import_ctx = _import_ctx;
 280         unsigned long len = *len_p;
 281         const struct wim_lookup_table_entry *lte = import_ctx->lte;
 282
 283         len = min(len, lte->size - import_ctx->offset);
 284
 285         if (read_partial_wim_stream_into_buf(lte, len, import_ctx->offset, data))
 286                 return ERROR_READ_FAULT;
 287
 288         import_ctx->offset += len;
 289         *len_p = len;
 290         return ERROR_SUCCESS;
 291 }
 292
 293 static int
 294 win32_extract_encrypted_stream(const wchar_t *path,
 295                                struct wim_lookup_table_entry *lte,
 296                                struct apply_ctx *ctx)
 297 {
 298         void *file_ctx;
 299         DWORD err;
 300         int ret;
 301         struct win32_encrypted_extract_ctx extract_ctx;
 302
 303         err = OpenEncryptedFileRaw(path, CREATE_FOR_IMPORT, &file_ctx);
 304         if (err != ERROR_SUCCESS) {
 305                 set_errno_from_win32_error(err);
 306                 ret = WIMLIB_ERR_OPEN;
 307                 goto out;
 308         }
 309
 310         extract_ctx.lte = lte;
 311         extract_ctx.offset = 0;
 312         err = WriteEncryptedFileRaw(win32_encrypted_import_cb, &extract_ctx,
 313                                     file_ctx);
 314         if (err != ERROR_SUCCESS) {
 315                 set_errno_from_win32_error(err);
 316                 ret = WIMLIB_ERR_WRITE;
 317                 goto out_close;
 318         }
 319
 320         ret = 0;
 321 out_close:
 322         CloseEncryptedFileRaw(file_ctx);
 323 out:
 324         return ret;
 325 }
 326
 327 static BOOL
 328 win32_set_special_file_attributes(const wchar_t *path, u32 attributes)
 329 {
 330         HANDLE h;
 331         DWORD err;
 332         USHORT compression_format = COMPRESSION_FORMAT_DEFAULT;
 333         DWORD bytes_returned;
 334
 335         h = win32_open_existing_file(path, GENERIC_READ | GENERIC_WRITE);
 336         if (h == INVALID_HANDLE_VALUE)
 337                 goto error;
 338
 339         if (attributes & FILE_ATTRIBUTE_SPARSE_FILE)
 340                 if (!DeviceIoControl(h, FSCTL_SET_SPARSE,
 341                                      NULL, 0,
 342                                      NULL, 0,
 343                                      &bytes_returned, NULL))
 344                         goto error_close_handle;
 345
 346         if (attributes & FILE_ATTRIBUTE_COMPRESSED)
 347                 if (!DeviceIoControl(h, FSCTL_SET_COMPRESSION,
 348                                      &compression_format, sizeof(USHORT),
 349                                      NULL, 0,
 350                                      &bytes_returned, NULL))
 351                         goto error_close_handle;
 352
 353         if (!CloseHandle(h))
 354                 goto error;
 355
 356         if (attributes & FILE_ATTRIBUTE_ENCRYPTED)
 357                 if (!EncryptFile(path))
 358                         goto error;
 359
 360         return TRUE;
 361
 362 error_close_handle:
 363         err = GetLastError();
 364         CloseHandle(h);
 365         SetLastError(err);
 366 error:
 367         return FALSE;
 368 }
 369
 370 static int
 371 win32_set_file_attributes(const wchar_t *path, u32 attributes,
 372                           struct apply_ctx *ctx, unsigned pass)
 373 {
 374         u32 special_attributes =
 375                 FILE_ATTRIBUTE_REPARSE_POINT |
 376                 FILE_ATTRIBUTE_DIRECTORY |
 377                 FILE_ATTRIBUTE_SPARSE_FILE |
 378                 FILE_ATTRIBUTE_COMPRESSED |
 379                 FILE_ATTRIBUTE_ENCRYPTED;
 380         u32 actual_attributes;
 381
 382         /* Delay setting FILE_ATTRIBUTE_READONLY on the initial pass (when files
 383          * are created, but data not extracted); otherwise the system will
 384          * refuse access to the file even if the process has SeRestorePrivilege.
 385          */
 386         if (pass == 0)
 387                 attributes &= ~FILE_ATTRIBUTE_READONLY;
 388
 389         if (!SetFileAttributes(path, attributes & ~special_attributes))
 390                 goto error;
 391
 392         if (pass != 0)
 393                 return 0;
 394
 395         if (attributes & (FILE_ATTRIBUTE_SPARSE_FILE |
 396                           FILE_ATTRIBUTE_ENCRYPTED |
 397                           FILE_ATTRIBUTE_COMPRESSED))
 398                 if (!win32_set_special_file_attributes(path, attributes))
 399                         goto error;
 400
 401         /* If file is not supposed to be encrypted or compressed, remove
 402          * defaulted encrypted or compressed attributes (from creating file in
 403          * encrypted or compressed directory).  */
 404         actual_attributes = GetFileAttributes(path);
 405         if (actual_attributes == INVALID_FILE_ATTRIBUTES)
 406                 goto error;
 407
 408         if ((actual_attributes & FILE_ATTRIBUTE_ENCRYPTED) &&
 409             !(attributes & FILE_ATTRIBUTE_ENCRYPTED))
 410                 if (!DecryptFile(path, 0))
 411                         goto error;
 412         if ((actual_attributes & FILE_ATTRIBUTE_COMPRESSED) &&
 413             !(attributes & FILE_ATTRIBUTE_COMPRESSED))
 414         {
 415                 HANDLE h;
 416                 DWORD bytes_returned;
 417                 USHORT compression_format = COMPRESSION_FORMAT_NONE;
 418
 419                 h = win32_open_existing_file(path, GENERIC_READ | GENERIC_WRITE);
 420                 if (h == INVALID_HANDLE_VALUE)
 421                         goto error;
 422
 423                 if (!DeviceIoControl(h, FSCTL_SET_COMPRESSION,
 424                                      &compression_format, sizeof(USHORT),
 425                                      NULL, 0,
 426                                      &bytes_returned, NULL))
 427                 {
 428                         DWORD err = GetLastError();
 429                         CloseHandle(h);
 430                         SetLastError(err);
 431                         goto error;
 432                 }
 433
 434                 if (!CloseHandle(h))
 435                         goto error;
 436         }
 437
 438         return 0;
 439
 440 error:
 441         set_errno_from_GetLastError();
 442         return WIMLIB_ERR_SET_ATTRIBUTES;
 443 }
 444
 445 static int
 446 win32_set_reparse_data(const wchar_t *path, const u8 *rpbuf, u16 rpbuflen,
 447                        struct apply_ctx *ctx)
 448 {
 449         HANDLE h;
 450         DWORD err;
 451         DWORD bytes_returned;
 452
 453         h = win32_open_existing_file(path, GENERIC_WRITE);
 454         if (h == INVALID_HANDLE_VALUE)
 455                 goto error;
 456
 457         if (!DeviceIoControl(h, FSCTL_SET_REPARSE_POINT,
 458                              (void*)rpbuf, rpbuflen,
 459                              NULL, 0, &bytes_returned, NULL))
 460                 goto error_close_handle;
 461
 462         if (!CloseHandle(h))
 463                 goto error;
 464
 465         return 0;
 466
 467 error_close_handle:
 468         err = GetLastError();
 469         CloseHandle(h);
 470         SetLastError(err);
 471 error:
 472         set_errno_from_GetLastError();
 473         return WIMLIB_ERR_WRITE; /* XXX: need better error code */
 474 }
 475
 476 static int
 477 win32_set_short_name(const wchar_t *path, const wchar_t *short_name,
 478                      size_t short_name_nchars, struct apply_ctx *ctx)
 479 {
 480         HANDLE h;
 481         DWORD err;
 482
 483         h = win32_open_existing_file(path, GENERIC_WRITE | DELETE);
 484         if (h == INVALID_HANDLE_VALUE)
 485                 goto error;
 486
 487         if (short_name_nchars) {
 488                 if (!SetFileShortName(h, short_name))
 489                         goto error_close_handle;
 490         } else if (running_on_windows_7_or_later()) {
 491                 if (!SetFileShortName(h, L""))
 492                         goto error_close_handle;
 493         }
 494
 495         if (!CloseHandle(h))
 496                 goto error;
 497
 498         return 0;
 499
 500 error_close_handle:
 501         err = GetLastError();
 502         CloseHandle(h);
 503         SetLastError(err);
 504 error:
 505         set_errno_from_GetLastError();
 506         return WIMLIB_ERR_WRITE; /* XXX: need better error code */
 507 }
 508
 509 static DWORD
 510 do_win32_set_security_descriptor(HANDLE h, const wchar_t *path,
 511                                  SECURITY_INFORMATION info,
 512                                  PSECURITY_DESCRIPTOR desc)
 513 {
 514 #ifdef WITH_NTDLL
 515         if (func_NtSetSecurityObject) {
 516                 return (*func_RtlNtStatusToDosError)(
 517                                 (*func_NtSetSecurityObject)(h, info, desc));
 518         }
 519 #endif
 520         if (SetFileSecurity(path, info, desc))
 521                 return ERROR_SUCCESS;
 522         else
 523                 return GetLastError();
 524 }
 525
 526 static int
 527 win32_set_security_descriptor(const wchar_t *path, const u8 *desc,
 528                               size_t desc_size, struct apply_ctx *ctx)
 529 {
 530         SECURITY_INFORMATION info;
 531         HANDLE h;
 532         DWORD err;
 533         int ret;
 534
 535         info = OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION |
 536                DACL_SECURITY_INFORMATION  | SACL_SECURITY_INFORMATION;
 537         h = INVALID_HANDLE_VALUE;
 538
 539 #ifdef WITH_NTDLL
 540         if (func_NtSetSecurityObject) {
 541                 h = win32_open_existing_file(path, MAXIMUM_ALLOWED);
 542                 if (h == INVALID_HANDLE_VALUE) {
 543                         set_errno_from_GetLastError();
 544                         ERROR_WITH_ERRNO("Can't open %ls", path);
 545                         return WIMLIB_ERR_SET_SECURITY;
 546                 }
 547         }
 548 #endif
 549
 550         for (;;) {
 551                 err = do_win32_set_security_descriptor(h, path, info,
 552                                                        (PSECURITY_DESCRIPTOR)desc);
 553                 if (err == ERROR_SUCCESS) {
 554                         ret = 0;
 555                         break;
 556                 }
 557                 if ((err == ERROR_PRIVILEGE_NOT_HELD ||
 558                      err == ERROR_ACCESS_DENIED) &&
 559                     !(ctx->extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_ACLS))
 560                 {
 561                         if (info & SACL_SECURITY_INFORMATION) {
 562                                 info &= ~SACL_SECURITY_INFORMATION;
 563                                 ctx->partial_security_descriptors++;
 564                                 continue;
 565                         }
 566                         if (info & DACL_SECURITY_INFORMATION) {
 567                                 info &= ~DACL_SECURITY_INFORMATION;
 568                                 continue;
 569                         }
 570                         if (info & OWNER_SECURITY_INFORMATION) {
 571                                 info &= ~OWNER_SECURITY_INFORMATION;
 572                                 continue;
 573                         }
 574                         ctx->partial_security_descriptors--;
 575                         ctx->no_security_descriptors++;
 576                         ret = 0;
 577                         break;
 578                 }
 579                 set_errno_from_win32_error(err);
 580                 ret = WIMLIB_ERR_SET_SECURITY;
 581                 break;
 582         }
 583 #ifdef WITH_NTDLL
 584         if (func_NtSetSecurityObject)
 585                 CloseHandle(h);
 586 #endif
 587         return ret;
 588 }
 589
 590 static int
 591 win32_set_timestamps(const wchar_t *path, u64 creation_time,
 592                      u64 last_write_time, u64 last_access_time,
 593                      struct apply_ctx *ctx)
 594 {
 595         HANDLE h;
 596         DWORD err;
 597         FILETIME creationTime = {.dwLowDateTime = creation_time & 0xffffffff,
 598                                  .dwHighDateTime = creation_time >> 32};
 599         FILETIME lastAccessTime = {.dwLowDateTime = last_access_time & 0xffffffff,
 600                                   .dwHighDateTime = last_access_time >> 32};
 601         FILETIME lastWriteTime = {.dwLowDateTime = last_write_time & 0xffffffff,
 602                                   .dwHighDateTime = last_write_time >> 32};
 603
 604         h = win32_open_existing_file(path, FILE_WRITE_ATTRIBUTES);
 605         if (h == INVALID_HANDLE_VALUE)
 606                 goto error;
 607
 608         if (!SetFileTime(h, &creationTime, &lastAccessTime, &lastWriteTime))
 609                 goto error_close_handle;
 610
 611         if (!CloseHandle(h))
 612                 goto error;
 613
 614         return 0;
 615
 616 error_close_handle:
 617         err = GetLastError();
 618         CloseHandle(h);
 619         SetLastError(err);
 620 error:
 621         set_errno_from_GetLastError();
 622         return WIMLIB_ERR_SET_TIMESTAMPS;
 623 }
 624
 625 const struct apply_operations win32_apply_ops = {
 626         .name = L"Win32",
 627
 628         .target_is_root           = win32_path_is_root_of_drive,
 629         .start_extract            = win32_start_extract,
 630         .create_file              = win32_create_file,
 631         .create_directory         = win32_create_directory,
 632         .create_hardlink          = win32_create_hardlink,
 633         .create_symlink           = win32_create_symlink,
 634         .extract_unnamed_stream   = win32_extract_unnamed_stream,
 635         .extract_named_stream     = win32_extract_named_stream,
 636         .extract_encrypted_stream = win32_extract_encrypted_stream,
 637         .set_file_attributes      = win32_set_file_attributes,
 638         .set_reparse_data         = win32_set_reparse_data,
 639         .set_short_name           = win32_set_short_name,
 640         .set_security_descriptor  = win32_set_security_descriptor,
 641         .set_timestamps           = win32_set_timestamps,
 642
 643         .path_prefix = L"\\\\?\\",
 644         .path_prefix_nchars = 4,
 645         .path_separator = L'\\',
 646         .path_max = 32768,
 647
 648         .requires_realtarget_in_paths = 1,
 649         .realpath_works_on_nonexisting_files = 1,
 650         .root_directory_is_special = 1,
 651         .requires_final_set_attributes_pass = 1,
 652         .extract_encrypted_stream_creates_file = 1,
 653         .requires_short_name_reordering = 1, /* TODO: check if this is really needed  */
 654 };
 655
 656 #endif /* __WIN32__ */