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   1 /*
   2  * win32_capture.c - Windows-specific code for capturing files into a WIM image.
   3  */
   4
   5 /*
   6  * Copyright (C) 2013, 2014 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/capture.h"
  33 #include "wimlib/dentry.h"
  34 #include "wimlib/encoding.h"
  35 #include "wimlib/endianness.h"
  36 #include "wimlib/error.h"
  37 #include "wimlib/lookup_table.h"
  38 #include "wimlib/paths.h"
  39 #include "wimlib/reparse.h"
  40
  41 #include <errno.h>
  42
  43 struct win32_capture_state {
  44         unsigned long num_get_sd_access_denied;
  45         unsigned long num_get_sacl_priv_notheld;
  46         unsigned long num_long_path_warnings;
  47 };
  48
  49 static NTSTATUS
  50 winnt_openat(HANDLE cur_dir, const wchar_t *path, size_t path_nchars,
  51              ACCESS_MASK perms, HANDLE *h_ret)
  52 {
  53         UNICODE_STRING name;
  54         OBJECT_ATTRIBUTES attr;
  55         IO_STATUS_BLOCK iosb;
  56         NTSTATUS status;
  57
  58         name.Length = path_nchars * sizeof(wchar_t);
  59         name.MaximumLength = name.Length + sizeof(wchar_t);
  60         name.Buffer = (wchar_t *)path;
  61
  62         attr.Length = sizeof(attr);
  63         attr.RootDirectory = cur_dir;
  64         attr.ObjectName = &name;
  65         attr.Attributes = 0;
  66         attr.SecurityDescriptor = NULL;
  67         attr.SecurityQualityOfService = NULL;
  68
  69 retry:
  70         status = (*func_NtOpenFile)(h_ret, perms, &attr, &iosb,
  71                                     FILE_SHARE_READ |
  72                                             FILE_SHARE_WRITE |
  73                                             FILE_SHARE_DELETE,
  74                                     FILE_OPEN_REPARSE_POINT |
  75                                             FILE_OPEN_FOR_BACKUP_INTENT |
  76                                             FILE_SYNCHRONOUS_IO_NONALERT);
  77         if (!NT_SUCCESS(status)) {
  78                 if (status == STATUS_ACCESS_DENIED ||
  79                     status == STATUS_PRIVILEGE_NOT_HELD) {
  80                         if (perms & ACCESS_SYSTEM_SECURITY) {
  81                                 perms &= ~ACCESS_SYSTEM_SECURITY;
  82                                 goto retry;
  83                         }
  84                         if (perms & READ_CONTROL) {
  85                                 perms &= ~READ_CONTROL;
  86                                 goto retry;
  87                         }
  88                 }
  89         }
  90         return status;
  91 }
  92
  93 int
  94 read_win32_file_prefix(const struct wim_lookup_table_entry *lte,
  95                        u64 size,
  96                        consume_data_callback_t cb,
  97                        void *cb_ctx)
  98 {
  99         const wchar_t *path;
 100         HANDLE h;
 101         NTSTATUS status;
 102         u8 buf[BUFFER_SIZE];
 103         u64 bytes_remaining;
 104         int ret;
 105
 106         path = lte->file_on_disk;
 107         status = winnt_openat(NULL, path, wcslen(path),
 108                               FILE_READ_DATA | SYNCHRONIZE, &h);
 109         if (!NT_SUCCESS(status)) {
 110                 set_errno_from_nt_status(status);
 111                 ERROR_WITH_ERRNO("\"%ls\": Can't open for reading", path);
 112                 return WIMLIB_ERR_OPEN;
 113         }
 114
 115         ret = 0;
 116         bytes_remaining = size;
 117         while (bytes_remaining) {
 118                 IO_STATUS_BLOCK iosb;
 119                 ULONG count;
 120
 121                 count = min(sizeof(buf), bytes_remaining);
 122
 123                 status = (*func_NtReadFile)(h, NULL, NULL, NULL,
 124                                             &iosb, buf, count, NULL, NULL);
 125                 if (!NT_SUCCESS(status) || iosb.Information != count) {
 126                         set_errno_from_nt_status(status);
 127                         ERROR_WITH_ERRNO("\"%ls\": Error reading data", path);
 128                         ret = WIMLIB_ERR_READ;
 129                         break;
 130                 }
 131
 132                 bytes_remaining -= count;
 133                 ret = (*cb)(buf, count, cb_ctx);
 134                 if (ret)
 135                         break;
 136         }
 137         (*func_NtClose)(h);
 138         return ret;
 139 }
 140
 141 struct win32_encrypted_read_ctx {
 142         consume_data_callback_t read_prefix_cb;
 143         void *read_prefix_ctx;
 144         int wimlib_err_code;
 145         u64 bytes_remaining;
 146 };
 147
 148 static DWORD WINAPI
 149 win32_encrypted_export_cb(unsigned char *data, void *_ctx, unsigned long len)
 150 {
 151         struct win32_encrypted_read_ctx *ctx = _ctx;
 152         int ret;
 153         size_t bytes_to_consume = min(len, ctx->bytes_remaining);
 154
 155         if (bytes_to_consume == 0)
 156                 return ERROR_SUCCESS;
 157
 158         ret = (*ctx->read_prefix_cb)(data, bytes_to_consume, ctx->read_prefix_ctx);
 159         if (ret) {
 160                 ctx->wimlib_err_code = ret;
 161                 /* Shouldn't matter what error code is returned here, as long as
 162                  * it isn't ERROR_SUCCESS.  */
 163                 return ERROR_READ_FAULT;
 164         }
 165         ctx->bytes_remaining -= bytes_to_consume;
 166         return ERROR_SUCCESS;
 167 }
 168
 169 int
 170 read_win32_encrypted_file_prefix(const struct wim_lookup_table_entry *lte,
 171                                  u64 size,
 172                                  consume_data_callback_t cb,
 173                                  void *cb_ctx)
 174 {
 175         struct win32_encrypted_read_ctx export_ctx;
 176         DWORD err;
 177         void *file_ctx;
 178         int ret;
 179
 180         DEBUG("Reading %"PRIu64" bytes from encrypted file \"%ls\"",
 181               size, lte->file_on_disk);
 182
 183         export_ctx.read_prefix_cb = cb;
 184         export_ctx.read_prefix_ctx = cb_ctx;
 185         export_ctx.wimlib_err_code = 0;
 186         export_ctx.bytes_remaining = size;
 187
 188         err = OpenEncryptedFileRaw(lte->file_on_disk, 0, &file_ctx);
 189         if (err != ERROR_SUCCESS) {
 190                 set_errno_from_win32_error(err);
 191                 ERROR_WITH_ERRNO("Failed to open encrypted file \"%ls\" "
 192                                  "for raw read", lte->file_on_disk);
 193                 return WIMLIB_ERR_OPEN;
 194         }
 195         err = ReadEncryptedFileRaw(win32_encrypted_export_cb,
 196                                    &export_ctx, file_ctx);
 197         if (err != ERROR_SUCCESS) {
 198                 set_errno_from_win32_error(err);
 199                 ERROR_WITH_ERRNO("Failed to read encrypted file \"%ls\"",
 200                                  lte->file_on_disk);
 201                 ret = export_ctx.wimlib_err_code;
 202                 if (ret == 0)
 203                         ret = WIMLIB_ERR_READ;
 204         } else if (export_ctx.bytes_remaining != 0) {
 205                 ERROR("Only could read %"PRIu64" of %"PRIu64" bytes from "
 206                       "encryted file \"%ls\"",
 207                       size - export_ctx.bytes_remaining, size,
 208                       lte->file_on_disk);
 209                 ret = WIMLIB_ERR_READ;
 210         } else {
 211                 ret = 0;
 212         }
 213         CloseEncryptedFileRaw(file_ctx);
 214         return ret;
 215 }
 216
 217
 218 static u64
 219 FILETIME_to_u64(const FILETIME *ft)
 220 {
 221         return ((u64)ft->dwHighDateTime << 32) | (u64)ft->dwLowDateTime;
 222 }
 223
 224 /* Load the short name of a file into a WIM dentry.
 225  *
 226  * If we can't read the short filename for some reason, we just ignore the error
 227  * and assume the file has no short name.  This shouldn't be an issue, since the
 228  * short names are essentially obsolete anyway.
 229  */
 230 static int
 231 win32_get_short_name(HANDLE hFile, struct wim_dentry *dentry)
 232 {
 233
 234         /* It's not any harder to just make the NtQueryInformationFile() system
 235          * call ourselves, and it saves a dumb call to FindFirstFile() which of
 236          * course has to create its own handle.  */
 237         NTSTATUS status;
 238         IO_STATUS_BLOCK io_status;
 239         u8 buf[128] _aligned_attribute(8);
 240         const FILE_NAME_INFORMATION *info;
 241
 242         status = (*func_NtQueryInformationFile)(hFile, &io_status, buf, sizeof(buf),
 243                                                 FileAlternateNameInformation);
 244         info = (const FILE_NAME_INFORMATION*)buf;
 245         if (NT_SUCCESS(status) && info->FileNameLength != 0) {
 246                 dentry->short_name = utf16le_dupz(info->FileName,
 247                                                   info->FileNameLength);
 248                 if (!dentry->short_name)
 249                         return WIMLIB_ERR_NOMEM;
 250                 dentry->short_name_nbytes = info->FileNameLength;
 251         }
 252         return 0;
 253 }
 254
 255 static int
 256 win32_get_security_descriptor(HANDLE h,
 257                               struct wim_inode *inode,
 258                               struct wim_sd_set *sd_set,
 259                               struct win32_capture_state *state,
 260                               int add_flags)
 261 {
 262         SECURITY_INFORMATION requestedInformation;
 263         u8 _buf[4096];
 264         u8 *buf;
 265         size_t bufsize;
 266         DWORD lenNeeded;
 267         NTSTATUS status;
 268         int ret;
 269
 270         requestedInformation = DACL_SECURITY_INFORMATION |
 271                                SACL_SECURITY_INFORMATION |
 272                                OWNER_SECURITY_INFORMATION |
 273                                GROUP_SECURITY_INFORMATION;
 274         buf = _buf;
 275         bufsize = sizeof(_buf);
 276
 277         /*
 278          * We need the file's security descriptor in SECURITY_DESCRIPTOR_RELATIVE
 279          * format, and we currently have a handle opened with as many relevant
 280          * permissions as possible.  At this point, on Windows there are a number of
 281          * options for reading a file's security descriptor:
 282          *
 283          * GetFileSecurity():  This takes in a path and returns the
 284          * SECURITY_DESCRIPTOR_RELATIVE.  Problem: this uses an internal handle, not
 285          * ours, and the handle created internally doesn't specify
 286          * FILE_FLAG_BACKUP_SEMANTICS.  Therefore there can be access denied errors on
 287          * some files and directories, even when running as the Administrator.
 288          *
 289          * GetSecurityInfo():  This takes in a handle and returns the security
 290          * descriptor split into a bunch of different parts.  This should work, but it's
 291          * dumb because we have to put the security descriptor back together again.
 292          *
 293          * BackupRead():  This can read the security descriptor, but this is a
 294          * difficult-to-use API, probably only works as the Administrator, and the
 295          * format of the returned data is not well documented.
 296          *
 297          * NtQuerySecurityObject():  This is exactly what we need, as it takes in a
 298          * handle and returns the security descriptor in SECURITY_DESCRIPTOR_RELATIVE
 299          * format.  Only problem is that it's a ntdll function and therefore not
 300          * officially part of the Win32 API.  Oh well.
 301          */
 302         while (!(NT_SUCCESS(status = (*func_NtQuerySecurityObject)(h,
 303                                                                    requestedInformation,
 304                                                                    (PSECURITY_DESCRIPTOR)buf,
 305                                                                    bufsize,
 306                                                                    &lenNeeded))))
 307         {
 308                 switch (status) {
 309                 case STATUS_BUFFER_OVERFLOW:
 310                         wimlib_assert(buf == _buf);
 311                         buf = MALLOC(lenNeeded);
 312                         if (!buf)
 313                                 return WIMLIB_ERR_NOMEM;
 314                         bufsize = lenNeeded;
 315                         break;
 316                 case STATUS_PRIVILEGE_NOT_HELD:
 317                 case STATUS_ACCESS_DENIED:
 318                         if (add_flags & WIMLIB_ADD_FLAG_STRICT_ACLS) {
 319                 default:
 320                                 set_errno_from_nt_status(status);
 321                                 ret = WIMLIB_ERR_READ;
 322                                 goto out_free_buf;
 323                         }
 324                         if (requestedInformation & SACL_SECURITY_INFORMATION) {
 325                                 state->num_get_sacl_priv_notheld++;
 326                                 requestedInformation &= ~SACL_SECURITY_INFORMATION;
 327                                 break;
 328                         }
 329                         state->num_get_sd_access_denied++;
 330                         ret = 0;
 331                         goto out_free_buf;
 332                 }
 333         }
 334
 335         inode->i_security_id = sd_set_add_sd(sd_set, buf, lenNeeded);
 336         if (inode->i_security_id < 0)
 337                 ret = WIMLIB_ERR_NOMEM;
 338         else
 339                 ret = 0;
 340 out_free_buf:
 341         if (buf != _buf)
 342                 FREE(buf);
 343         return ret;
 344 }
 345
 346 static int
 347 win32_build_dentry_tree_recursive(struct wim_dentry **root_ret,
 348                                   HANDLE cur_dir,
 349                                   wchar_t *full_path,
 350                                   size_t full_path_nchars,
 351                                   const wchar_t *filename,
 352                                   size_t filename_nchars,
 353                                   struct add_image_params *params,
 354                                   struct win32_capture_state *state,
 355                                   unsigned vol_flags);
 356
 357 /* Reads the directory entries of directory and recursively calls
 358  * win32_build_dentry_tree() on them.  */
 359 static int
 360 win32_recurse_directory(HANDLE h,
 361                         wchar_t *full_path,
 362                         size_t full_path_nchars,
 363                         struct wim_dentry *root,
 364                         struct add_image_params *params,
 365                         struct win32_capture_state *state,
 366                         unsigned vol_flags)
 367 {
 368         int ret;
 369
 370         /* Using NtQueryDirectoryFile() we can re-use the same open handle,
 371          * which we opened with FILE_FLAG_BACKUP_SEMANTICS.  */
 372
 373         NTSTATUS status;
 374         IO_STATUS_BLOCK io_status;
 375         const size_t bufsize = 8192;
 376         void *buf;
 377
 378         buf = MALLOC(bufsize);
 379         if (!buf)
 380                 return WIMLIB_ERR_NOMEM;
 381
 382         while (NT_SUCCESS(status = (*func_NtQueryDirectoryFile)(h, NULL, NULL, NULL,
 383                                                                 &io_status, buf, bufsize,
 384                                                                 FileNamesInformation,
 385                                                                 FALSE, NULL, FALSE)))
 386         {
 387                 const FILE_NAMES_INFORMATION *info = buf;
 388                 for (;;) {
 389                         if (!(info->FileNameLength == 2 && info->FileName[0] == L'.') &&
 390                             !(info->FileNameLength == 4 && info->FileName[0] == L'.' &&
 391                                                            info->FileName[1] == L'.'))
 392                         {
 393                                 wchar_t *p;
 394                                 struct wim_dentry *child;
 395
 396                                 p = full_path + full_path_nchars;
 397                                 *p++ = L'\\';
 398                                 p = wmempcpy(p, info->FileName,
 399                                              info->FileNameLength / 2);
 400                                 *p = '\0';
 401
 402                                 ret = win32_build_dentry_tree_recursive(
 403                                                                 &child,
 404                                                                 h,
 405                                                                 full_path,
 406                                                                 p - full_path,
 407                                                                 full_path + full_path_nchars + 1,
 408                                                                 info->FileNameLength / 2,
 409                                                                 params,
 410                                                                 state,
 411                                                                 vol_flags);
 412
 413                                 full_path[full_path_nchars] = L'\0';
 414
 415                                 if (ret)
 416                                         goto out_free_buf;
 417                                 if (child)
 418                                         dentry_add_child(root, child);
 419                         }
 420                         if (info->NextEntryOffset == 0)
 421                                 break;
 422                         info = (const FILE_NAMES_INFORMATION *)
 423                                         ((const u8 *)info + info->NextEntryOffset);
 424                 }
 425         }
 426
 427         if (status != STATUS_NO_MORE_FILES) {
 428                 set_errno_from_nt_status(status);
 429                 ERROR_WITH_ERRNO("\"%ls\": Can't read directory", full_path);
 430                 ret = WIMLIB_ERR_READ;
 431         }
 432 out_free_buf:
 433         FREE(buf);
 434         return ret;
 435 }
 436
 437 /* Reparse point fixup status code */
 438 enum rp_status {
 439         /* Reparse point corresponded to an absolute symbolic link or junction
 440          * point that pointed outside the directory tree being captured, and
 441          * therefore was excluded. */
 442         RP_EXCLUDED       = 0x0,
 443
 444         /* Reparse point was not fixed as it was either a relative symbolic
 445          * link, a mount point, or something else we could not understand. */
 446         RP_NOT_FIXED      = 0x1,
 447
 448         /* Reparse point corresponded to an absolute symbolic link or junction
 449          * point that pointed inside the directory tree being captured, where
 450          * the target was specified by a "full" \??\ prefixed path, and
 451          * therefore was fixed to be relative to the root of the directory tree
 452          * being captured. */
 453         RP_FIXED_FULLPATH = 0x2,
 454
 455         /* Same as RP_FIXED_FULLPATH, except the absolute link target did not
 456          * have the \??\ prefix.  It may have begun with a drive letter though.
 457          * */
 458         RP_FIXED_ABSPATH  = 0x4,
 459
 460         /* Either RP_FIXED_FULLPATH or RP_FIXED_ABSPATH. */
 461         RP_FIXED          = RP_FIXED_FULLPATH | RP_FIXED_ABSPATH,
 462 };
 463
 464 /* Given the "substitute name" target of a Windows reparse point, try doing a
 465  * fixup where we change it to be absolute relative to the root of the directory
 466  * tree being captured.
 467  *
 468  * Note that this is only executed when WIMLIB_ADD_FLAG_RPFIX has been
 469  * set.
 470  *
 471  * @capture_root_ino and @capture_root_dev indicate the inode number and device
 472  * of the root of the directory tree being captured.  They are meant to identify
 473  * this directory (as an alternative to its actual path, which could potentially
 474  * be reached via multiple destinations due to other symbolic links).  This may
 475  * not work properly on FAT, which doesn't seem to supply proper inode numbers
 476  * or file IDs.  However, FAT doesn't support reparse points so this function
 477  * wouldn't even be called anyway.
 478  */
 479 static enum rp_status
 480 win32_capture_maybe_rpfix_target(wchar_t *target, u16 *target_nbytes_p,
 481                                  u64 capture_root_ino, u64 capture_root_dev,
 482                                  u32 rptag)
 483 {
 484         u16 target_nchars = *target_nbytes_p / 2;
 485         size_t stripped_chars;
 486         wchar_t *orig_target;
 487         int ret;
 488
 489         ret = parse_substitute_name(target, *target_nbytes_p, rptag);
 490         if (ret < 0)
 491                 return RP_NOT_FIXED;
 492         stripped_chars = ret;
 493         if (stripped_chars)
 494                 stripped_chars -= 2;
 495         target[target_nchars] = L'\0';
 496         orig_target = target;
 497         target = capture_fixup_absolute_symlink(target + stripped_chars,
 498                                                 capture_root_ino, capture_root_dev);
 499         if (!target)
 500                 return RP_EXCLUDED;
 501         target_nchars = wcslen(target);
 502         wmemmove(orig_target + stripped_chars, target, target_nchars + 1);
 503         *target_nbytes_p = (target_nchars + stripped_chars) * sizeof(wchar_t);
 504         DEBUG("Fixed reparse point (new target: \"%ls\")", orig_target);
 505         if (stripped_chars)
 506                 return RP_FIXED_FULLPATH;
 507         else
 508                 return RP_FIXED_ABSPATH;
 509 }
 510
 511 /* Returns: `enum rp_status' value on success; negative WIMLIB_ERR_* value on
 512  * failure. */
 513 static int
 514 win32_capture_try_rpfix(u8 *rpbuf, u16 *rpbuflen_p,
 515                         u64 capture_root_ino, u64 capture_root_dev,
 516                         const wchar_t *path, struct add_image_params *params)
 517 {
 518         struct reparse_data rpdata;
 519         int ret;
 520         enum rp_status rp_status;
 521
 522         ret = parse_reparse_data(rpbuf, *rpbuflen_p, &rpdata);
 523         if (ret)
 524                 return -ret;
 525
 526         rp_status = win32_capture_maybe_rpfix_target(rpdata.substitute_name,
 527                                                      &rpdata.substitute_name_nbytes,
 528                                                      capture_root_ino,
 529                                                      capture_root_dev,
 530                                                      le32_to_cpu(*(le32*)rpbuf));
 531         if (rp_status & RP_FIXED) {
 532                 wimlib_assert(rpdata.substitute_name_nbytes % 2 == 0);
 533                 utf16lechar substitute_name_copy[rpdata.substitute_name_nbytes / 2];
 534                 wmemcpy(substitute_name_copy, rpdata.substitute_name,
 535                         rpdata.substitute_name_nbytes / 2);
 536                 rpdata.substitute_name = substitute_name_copy;
 537                 rpdata.print_name = substitute_name_copy;
 538                 rpdata.print_name_nbytes = rpdata.substitute_name_nbytes;
 539                 if (rp_status == RP_FIXED_FULLPATH) {
 540                         /* "full path", meaning \??\ prefixed.  We should not
 541                          * include this prefix in the print name, as it is
 542                          * apparently meant for the filesystem driver only. */
 543                         rpdata.print_name += 4;
 544                         rpdata.print_name_nbytes -= 8;
 545                 }
 546                 ret = make_reparse_buffer(&rpdata, rpbuf, rpbuflen_p);
 547                 if (ret == 0)
 548                         ret = rp_status;
 549                 else
 550                         ret = -ret;
 551         } else {
 552                 if (rp_status == RP_EXCLUDED) {
 553                         /* Ignoring absolute symbolic link or junction point
 554                          * that points out of the tree to be captured.  */
 555                         size_t print_name_nchars = rpdata.print_name_nbytes / 2;
 556                         wchar_t print_name0[print_name_nchars + 1];
 557                         print_name0[print_name_nchars] = L'\0';
 558                         wmemcpy(print_name0, rpdata.print_name, print_name_nchars);
 559
 560                         params->progress.scan.cur_path = path;
 561                         params->progress.scan.symlink_target = print_name0;
 562                         do_capture_progress(params,
 563                                             WIMLIB_SCAN_DENTRY_EXCLUDED_SYMLINK,
 564                                             NULL);
 565                 }
 566                 ret = rp_status;
 567         }
 568         return ret;
 569 }
 570
 571 /*
 572  * Loads the reparse point data from a reparse point into memory, optionally
 573  * fixing the targets of absolute symbolic links and junction points to be
 574  * relative to the root of capture.
 575  *
 576  * @h:      Open handle to the reparse point.
 577  * @path:   Path to the reparse point file.
 578  * @params: Additional parameters, including whether to do reparse point fixups
 579  *          or not.
 580  * @rpbuf:  Buffer of length at least REPARSE_POINT_MAX_SIZE bytes into which
 581  *          the reparse point buffer will be loaded.
 582  * @rpbuflen_ret:  On success, the length of the reparse point buffer in bytes
 583  *                 is written to this location.
 584  *
 585  * Returns:
 586  *      On success, returns an `enum rp_status' value that indicates if and/or
 587  *      how the reparse point fixup was done.
 588  *
 589  *      On failure, returns a negative value that is a negated WIMLIB_ERR_*
 590  *      code.
 591  */
 592 static int
 593 win32_get_reparse_data(HANDLE h, const wchar_t *path,
 594                        struct add_image_params *params,
 595                        u8 *rpbuf, u16 *rpbuflen_ret)
 596 {
 597         DWORD bytesReturned;
 598         u32 reparse_tag;
 599         int ret;
 600         u16 rpbuflen;
 601
 602         if (!DeviceIoControl(h, FSCTL_GET_REPARSE_POINT,
 603                              NULL, /* "Not used with this operation; set to NULL" */
 604                              0, /* "Not used with this operation; set to 0" */
 605                              rpbuf, /* "A pointer to a buffer that
 606                                                    receives the reparse point data */
 607                              REPARSE_POINT_MAX_SIZE, /* "The size of the output
 608                                                         buffer, in bytes */
 609                              &bytesReturned,
 610                              NULL))
 611         {
 612                 set_errno_from_GetLastError();
 613                 return -WIMLIB_ERR_READ;
 614         }
 615
 616         if (bytesReturned < 8 || bytesReturned > REPARSE_POINT_MAX_SIZE) {
 617                 errno = EINVAL;
 618                 return -WIMLIB_ERR_INVALID_REPARSE_DATA;
 619         }
 620
 621         rpbuflen = bytesReturned;
 622         reparse_tag = le32_to_cpu(*(le32*)rpbuf);
 623         if (params->add_flags & WIMLIB_ADD_FLAG_RPFIX &&
 624             (reparse_tag == WIM_IO_REPARSE_TAG_SYMLINK ||
 625              reparse_tag == WIM_IO_REPARSE_TAG_MOUNT_POINT))
 626         {
 627                 /* Try doing reparse point fixup */
 628                 ret = win32_capture_try_rpfix(rpbuf,
 629                                               &rpbuflen,
 630                                               params->capture_root_ino,
 631                                               params->capture_root_dev,
 632                                               path,
 633                                               params);
 634         } else {
 635                 ret = RP_NOT_FIXED;
 636         }
 637         *rpbuflen_ret = rpbuflen;
 638         return ret;
 639 }
 640
 641 static DWORD WINAPI
 642 win32_tally_encrypted_size_cb(unsigned char *_data, void *_size_ret,
 643                               unsigned long len)
 644 {
 645         *(u64*)_size_ret += len;
 646         return ERROR_SUCCESS;
 647 }
 648
 649 static int
 650 win32_get_encrypted_file_size(const wchar_t *path, u64 *size_ret)
 651 {
 652         DWORD err;
 653         void *file_ctx;
 654         int ret;
 655
 656         err = OpenEncryptedFileRaw(path, 0, &file_ctx);
 657         if (err != ERROR_SUCCESS) {
 658                 set_errno_from_win32_error(err);
 659                 ERROR_WITH_ERRNO("Failed to open encrypted file \"%ls\" "
 660                                  "for raw read", path);
 661                 return WIMLIB_ERR_OPEN;
 662         }
 663         *size_ret = 0;
 664         err = ReadEncryptedFileRaw(win32_tally_encrypted_size_cb,
 665                                    size_ret, file_ctx);
 666         if (err != ERROR_SUCCESS) {
 667                 set_errno_from_win32_error(err);
 668                 ERROR_WITH_ERRNO("Failed to read raw encrypted data from "
 669                                  "\"%ls\"", path);
 670                 ret = WIMLIB_ERR_READ;
 671         } else {
 672                 ret = 0;
 673         }
 674         CloseEncryptedFileRaw(file_ctx);
 675         return ret;
 676 }
 677
 678 static bool
 679 get_data_stream_name(const wchar_t *raw_stream_name, size_t raw_stream_name_nchars,
 680                      const wchar_t **stream_name_ret, size_t *stream_name_nchars_ret)
 681 {
 682         const wchar_t *sep, *type, *end;
 683
 684         /* The stream name should be returned as :NAME:TYPE  */
 685         if (raw_stream_name_nchars < 1)
 686                 return false;
 687         if (raw_stream_name[0] != L':')
 688                 return false;
 689
 690         raw_stream_name++;
 691         raw_stream_name_nchars--;
 692
 693         end = raw_stream_name + raw_stream_name_nchars;
 694
 695         sep = wmemchr(raw_stream_name, L':', raw_stream_name_nchars);
 696         if (!sep)
 697                 return false;
 698
 699         type = sep + 1;
 700         if (end - type != 5)
 701                 return false;
 702
 703         if (wmemcmp(type, L"$DATA", 5))
 704                 return false;
 705
 706         *stream_name_ret = raw_stream_name;
 707         *stream_name_nchars_ret = sep - raw_stream_name;
 708         return true;
 709 }
 710
 711 static wchar_t *
 712 build_stream_path(const wchar_t *path, size_t path_nchars,
 713                   const wchar_t *stream_name, size_t stream_name_nchars)
 714 {
 715         size_t stream_path_nchars;
 716         wchar_t *stream_path;
 717         wchar_t *p;
 718
 719         stream_path_nchars = path_nchars;
 720         if (stream_name_nchars)
 721                 stream_path_nchars += 1 + stream_name_nchars;
 722
 723         stream_path = MALLOC((stream_path_nchars + 1) * sizeof(wchar_t));
 724         if (stream_path) {
 725                 p = wmempcpy(stream_path, path, path_nchars);
 726                 if (stream_name_nchars) {
 727                         *p++ = L':';
 728                         p = wmempcpy(p, stream_name, stream_name_nchars);
 729                 }
 730                 *p++ = L'\0';
 731         }
 732         return stream_path;
 733 }
 734
 735 static int
 736 win32_capture_stream(const wchar_t *path, size_t path_nchars,
 737                      const wchar_t *raw_stream_name, size_t raw_stream_name_nchars,
 738                      u64 stream_size,
 739                      struct wim_inode *inode,
 740                      struct list_head *unhashed_streams)
 741 {
 742         const wchar_t *stream_name;
 743         size_t stream_name_nchars;
 744         struct wim_ads_entry *ads_entry;
 745         wchar_t *stream_path;
 746         struct wim_lookup_table_entry *lte;
 747         u32 stream_id;
 748
 749         /* Given the raw stream name (which is something like
 750          * L":streamname:$DATA", extract just the stream name part.  */
 751         if (!get_data_stream_name(raw_stream_name, raw_stream_name_nchars,
 752                                   &stream_name, &stream_name_nchars))
 753                 return 0;
 754
 755         /* If this is a named stream, allocate an ADS entry.  */
 756         if (stream_name_nchars) {
 757                 ads_entry = inode_add_ads_utf16le(inode, stream_name,
 758                                                   stream_name_nchars * sizeof(wchar_t));
 759                 if (!ads_entry)
 760                         return WIMLIB_ERR_NOMEM;
 761         } else {
 762                 ads_entry = NULL;
 763         }
 764
 765         /* If the stream is empty, no lookup table entry is needed. */
 766         if (stream_size == 0)
 767                 return 0;
 768
 769         /* Build the path to the stream.  For unnamed streams, this is simply
 770          * the path to the file.  For named streams, this is the path to the
 771          * file, followed by a colon, followed by the stream name.  */
 772         stream_path = build_stream_path(path, path_nchars,
 773                                         stream_name, stream_name_nchars);
 774         if (!stream_path)
 775                 return WIMLIB_ERR_NOMEM;
 776
 777         /* Set up the lookup table entry for the stream.  */
 778         lte = new_lookup_table_entry();
 779         if (!lte) {
 780                 FREE(stream_path);
 781                 return WIMLIB_ERR_NOMEM;
 782         }
 783         lte->file_on_disk = stream_path;
 784         lte->resource_location = RESOURCE_IN_FILE_ON_DISK;
 785         lte->size = stream_size;
 786         if ((inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED) && !ads_entry) {
 787                 /* Special case for encrypted file.  */
 788
 789                 /* OpenEncryptedFileRaw() expects Win32 name, not NT name.  */
 790                 lte->file_on_disk[1] = L'\\';
 791                 wimlib_assert(!wmemcmp(lte->file_on_disk, L"\\\\?\\", 4));
 792
 793                 u64 encrypted_size;
 794                 int ret;
 795
 796                 ret = win32_get_encrypted_file_size(lte->file_on_disk,
 797                                                     &encrypted_size);
 798                 if (ret) {
 799                         free_lookup_table_entry(lte);
 800                         return ret;
 801                 }
 802                 lte->size = encrypted_size;
 803                 lte->resource_location = RESOURCE_WIN32_ENCRYPTED;
 804         }
 805
 806         if (ads_entry) {
 807                 stream_id = ads_entry->stream_id;
 808                 ads_entry->lte = lte;
 809         } else {
 810                 stream_id = 0;
 811                 inode->i_lte = lte;
 812         }
 813         add_unhashed_stream(lte, inode, stream_id, unhashed_streams);
 814         return 0;
 815 }
 816
 817 /* Load information about the streams of an open file into a WIM inode.
 818  *
 819  * We use the NtQueryInformationFile() system call instead of FindFirstStream()
 820  * and FindNextStream().  This is done for two reasons:
 821  *
 822  * - FindFirstStream() opens its own handle to the file or directory and
 823  *   apparently does so without specifying FILE_FLAG_BACKUP_SEMANTICS, thereby
 824  *   causing access denied errors on certain files (even when running as the
 825  *   Administrator).
 826  * - FindFirstStream() and FindNextStream() is only available on Windows Vista
 827  *   and later, whereas the stream support in NtQueryInformationFile() was
 828  *   already present in Windows XP.
 829  */
 830 static int
 831 win32_capture_streams(HANDLE *hFile_p,
 832                       const wchar_t *path,
 833                       size_t path_nchars,
 834                       struct wim_inode *inode,
 835                       struct list_head *unhashed_streams,
 836                       u64 file_size,
 837                       unsigned vol_flags)
 838 {
 839         int ret;
 840         u8 _buf[8192] _aligned_attribute(8);
 841         u8 *buf;
 842         size_t bufsize;
 843         IO_STATUS_BLOCK io_status;
 844         NTSTATUS status;
 845         const FILE_STREAM_INFORMATION *info;
 846
 847         DEBUG("Capturing streams from \"%ls\"", path);
 848
 849         buf = _buf;
 850         bufsize = sizeof(_buf);
 851
 852         if (!(vol_flags & FILE_NAMED_STREAMS))
 853                 goto unnamed_only;
 854
 855         /* Get a buffer containing the stream information.  */
 856         while (!NT_SUCCESS(status = (*func_NtQueryInformationFile)(*hFile_p,
 857                                                                    &io_status,
 858                                                                    buf,
 859                                                                    bufsize,
 860                                                                    FileStreamInformation)))
 861         {
 862
 863                 switch (status) {
 864                 case STATUS_BUFFER_OVERFLOW:
 865                         {
 866                                 u8 *newbuf;
 867
 868                                 bufsize *= 2;
 869                                 if (buf == _buf)
 870                                         newbuf = MALLOC(bufsize);
 871                                 else
 872                                         newbuf = REALLOC(buf, bufsize);
 873                                 if (!newbuf) {
 874                                         ret = WIMLIB_ERR_NOMEM;
 875                                         goto out_free_buf;
 876                                 }
 877                                 buf = newbuf;
 878                         }
 879                         break;
 880                 case STATUS_NOT_IMPLEMENTED:
 881                 case STATUS_NOT_SUPPORTED:
 882                 case STATUS_INVALID_INFO_CLASS:
 883                         goto unnamed_only;
 884                 default:
 885                         set_errno_from_nt_status(status);
 886                         ERROR_WITH_ERRNO("\"%ls\": Failed to query "
 887                                          "stream information", path);
 888                         ret = WIMLIB_ERR_READ;
 889                         goto out_free_buf;
 890                 }
 891         }
 892
 893         if (io_status.Information == 0) {
 894                 /* No stream information.  */
 895                 ret = 0;
 896                 goto out_free_buf;
 897         }
 898
 899         if (inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED) {
 900                 /* OpenEncryptedFileRaw() seems to fail with
 901                  * ERROR_SHARING_VIOLATION if there are any handles opened to
 902                  * the file.  */
 903                 (*func_NtClose)(*hFile_p);
 904                 *hFile_p = INVALID_HANDLE_VALUE;
 905         }
 906
 907         /* Parse one or more stream information structures.  */
 908         info = (const FILE_STREAM_INFORMATION *)buf;
 909         for (;;) {
 910                 /* Capture the stream.  */
 911                 ret = win32_capture_stream(path, path_nchars,
 912                                            info->StreamName,
 913                                            info->StreamNameLength / 2,
 914                                            info->StreamSize.QuadPart,
 915                                            inode, unhashed_streams);
 916                 if (ret)
 917                         goto out_free_buf;
 918
 919                 if (info->NextEntryOffset == 0) {
 920                         /* No more stream information.  */
 921                         break;
 922                 }
 923                 /* Advance to next stream information.  */
 924                 info = (const FILE_STREAM_INFORMATION *)
 925                                 ((const u8 *)info + info->NextEntryOffset);
 926         }
 927         ret = 0;
 928         goto out_free_buf;
 929
 930 unnamed_only:
 931         /* The volume does not support named streams.  Only capture the unnamed
 932          * data stream. */
 933         DEBUG("Only capturing unnamed data stream");
 934         if (inode->i_attributes & (FILE_ATTRIBUTE_DIRECTORY |
 935                                    FILE_ATTRIBUTE_REPARSE_POINT))
 936         {
 937                 ret = 0;
 938                 goto out_free_buf;
 939         }
 940
 941         ret = win32_capture_stream(path, path_nchars,
 942                                    L"::$DATA", 7, file_size,
 943                                    inode, unhashed_streams);
 944 out_free_buf:
 945         /* Free buffer if allocated on heap.  */
 946         if (buf != _buf)
 947                 FREE(buf);
 948         return ret;
 949 }
 950
 951 static int
 952 win32_build_dentry_tree_recursive(struct wim_dentry **root_ret,
 953                                   HANDLE cur_dir,
 954                                   wchar_t *full_path,
 955                                   size_t full_path_nchars,
 956                                   const wchar_t *filename,
 957                                   size_t filename_nchars,
 958                                   struct add_image_params *params,
 959                                   struct win32_capture_state *state,
 960                                   unsigned vol_flags)
 961 {
 962         struct wim_dentry *root = NULL;
 963         struct wim_inode *inode = NULL;
 964         HANDLE h = INVALID_HANDLE_VALUE;
 965         int ret;
 966         NTSTATUS status;
 967         BY_HANDLE_FILE_INFORMATION file_info;
 968         u8 *rpbuf;
 969         u16 rpbuflen;
 970         u16 not_rpfixed;
 971
 972         if (should_exclude_path(full_path + params->capture_root_nchars,
 973                                 full_path_nchars - params->capture_root_nchars,
 974                                 params->config))
 975         {
 976                 ret = 0;
 977                 goto out_progress;
 978         }
 979
 980         status = winnt_openat(cur_dir,
 981                               (cur_dir ? filename : full_path),
 982                               (cur_dir ? filename_nchars : full_path_nchars),
 983                               FILE_READ_DATA |
 984                                         FILE_READ_ATTRIBUTES |
 985                                         READ_CONTROL |
 986                                         ACCESS_SYSTEM_SECURITY |
 987                                         SYNCHRONIZE,
 988                               &h);
 989         if (!NT_SUCCESS(status)) {
 990                 set_errno_from_nt_status(status);
 991                 ERROR_WITH_ERRNO("\"%ls\": Can't open file", full_path);
 992                 ret = WIMLIB_ERR_OPEN;
 993                 goto out;
 994         }
 995
 996         if (!GetFileInformationByHandle(h, &file_info)) {
 997                 set_errno_from_GetLastError();
 998                 ERROR_WITH_ERRNO("\"%ls\": Can't get file information", full_path);
 999                 ret = WIMLIB_ERR_STAT;
1000                 goto out;
1001         }
1002
1003         if (file_info.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
1004                 rpbuf = alloca(REPARSE_POINT_MAX_SIZE);
1005                 ret = win32_get_reparse_data(h, full_path,
1006                                              params, rpbuf, &rpbuflen);
1007                 if (ret < 0) {
1008                         /* WIMLIB_ERR_* (inverted) */
1009                         ret = -ret;
1010                         ERROR_WITH_ERRNO("\"%ls\": Can't get reparse data",
1011                                          full_path);
1012                         goto out;
1013                 } else if (ret & RP_FIXED) {
1014                         not_rpfixed = 0;
1015                 } else if (ret == RP_EXCLUDED) {
1016                         ret = 0;
1017                         goto out;
1018                 } else {
1019                         not_rpfixed = 1;
1020                 }
1021         }
1022
1023         /* Create a WIM dentry with an associated inode, which may be shared.
1024          *
1025          * However, we need to explicitly check for directories and files with
1026          * only 1 link and refuse to hard link them.  This is because Windows
1027          * has a bug where it can return duplicate File IDs for files and
1028          * directories on the FAT filesystem. */
1029         ret = inode_table_new_dentry(params->inode_table,
1030                                      filename,
1031                                      ((u64)file_info.nFileIndexHigh << 32) |
1032                                          (u64)file_info.nFileIndexLow,
1033                                      file_info.dwVolumeSerialNumber,
1034                                      (file_info.nNumberOfLinks <= 1 ||
1035                                         (file_info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)),
1036                                      &root);
1037         if (ret)
1038                 goto out;
1039
1040         ret = win32_get_short_name(h, root);
1041         if (ret) {
1042                 ERROR_WITH_ERRNO("\"%ls\": Can't get short name", full_path);
1043                 goto out;
1044         }
1045
1046         inode = root->d_inode;
1047
1048         if (inode->i_nlink > 1) {
1049                 /* Shared inode; nothing more to do */
1050                 ret = 0;
1051                 goto out_progress;
1052         }
1053
1054         inode->i_attributes = file_info.dwFileAttributes;
1055         inode->i_creation_time = FILETIME_to_u64(&file_info.ftCreationTime);
1056         inode->i_last_write_time = FILETIME_to_u64(&file_info.ftLastWriteTime);
1057         inode->i_last_access_time = FILETIME_to_u64(&file_info.ftLastAccessTime);
1058         inode->i_resolved = 1;
1059
1060         params->add_flags &= ~WIMLIB_ADD_FLAG_ROOT;
1061
1062         if (!(params->add_flags & WIMLIB_ADD_FLAG_NO_ACLS)
1063             && (vol_flags & FILE_PERSISTENT_ACLS))
1064         {
1065                 ret = win32_get_security_descriptor(h, inode,
1066                                                     params->sd_set, state,
1067                                                     params->add_flags);
1068                 if (ret) {
1069                         ERROR_WITH_ERRNO("\"%ls\": Can't "
1070                                          "read security descriptor", full_path);
1071                         goto out;
1072                 }
1073         }
1074
1075         /* Capture the unnamed data stream (only should be present for regular
1076          * files) and any alternate data streams. */
1077         ret = win32_capture_streams(&h,
1078                                     full_path,
1079                                     full_path_nchars,
1080                                     inode,
1081                                     params->unhashed_streams,
1082                                     ((u64)file_info.nFileSizeHigh << 32) |
1083                                         file_info.nFileSizeLow,
1084                                     vol_flags);
1085         if (ret)
1086                 goto out;
1087
1088         if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT) {
1089                 /* Reparse point: set the reparse data (which we read already)
1090                  * */
1091                 inode->i_not_rpfixed = not_rpfixed;
1092                 inode->i_reparse_tag = le32_to_cpu(*(le32*)rpbuf);
1093                 ret = inode_set_unnamed_stream(inode, rpbuf + 8, rpbuflen - 8,
1094                                                params->lookup_table);
1095         } else if (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY) {
1096                 /* Directory (not a reparse point) --- recurse to children */
1097
1098                 if (h == INVALID_HANDLE_VALUE) {
1099                         /* Re-open handle that was closed to read raw encrypted
1100                          * data.  */
1101                         status = winnt_openat(cur_dir,
1102                                               (cur_dir ?
1103                                                filename : full_path),
1104                                               (cur_dir ?
1105                                                filename_nchars : full_path_nchars),
1106                                               FILE_LIST_DIRECTORY | SYNCHRONIZE,
1107                                               &h);
1108                         if (!NT_SUCCESS(status)) {
1109                                 set_errno_from_nt_status(status);
1110                                 ERROR_WITH_ERRNO("\"%ls\": Can't open file",
1111                                                  full_path);
1112                                 ret = WIMLIB_ERR_OPEN;
1113                                 goto out;
1114                         }
1115                 }
1116                 ret = win32_recurse_directory(h,
1117                                               full_path,
1118                                               full_path_nchars,
1119                                               root,
1120                                               params,
1121                                               state,
1122                                               vol_flags);
1123         }
1124         if (ret)
1125                 goto out;
1126
1127 out_progress:
1128         params->progress.scan.cur_path = full_path;
1129         if (root)
1130                 do_capture_progress(params, WIMLIB_SCAN_DENTRY_OK, inode);
1131         else
1132                 do_capture_progress(params, WIMLIB_SCAN_DENTRY_EXCLUDED, NULL);
1133 out:
1134         if (h != INVALID_HANDLE_VALUE)
1135                 (*func_NtClose)(h);
1136         if (ret == 0)
1137                 *root_ret = root;
1138         else
1139                 free_dentry_tree(root, params->lookup_table);
1140         return ret;
1141 }
1142
1143 static void
1144 win32_do_capture_warnings(const wchar_t *path,
1145                           const struct win32_capture_state *state,
1146                           int add_flags)
1147 {
1148         if (state->num_get_sacl_priv_notheld == 0 &&
1149             state->num_get_sd_access_denied == 0)
1150                 return;
1151
1152         WARNING("Scan of \"%ls\" complete, but with one or more warnings:", path);
1153         if (state->num_get_sacl_priv_notheld != 0) {
1154                 WARNING("- Could not capture SACL (System Access Control List)\n"
1155                         "            on %lu files or directories.",
1156                         state->num_get_sacl_priv_notheld);
1157         }
1158         if (state->num_get_sd_access_denied != 0) {
1159                 WARNING("- Could not capture security descriptor at all\n"
1160                         "            on %lu files or directories.",
1161                         state->num_get_sd_access_denied);
1162         }
1163         WARNING("To fully capture all security descriptors, run the program\n"
1164                 "          with Administrator rights.");
1165 }
1166
1167 #define WINDOWS_NT_MAX_PATH 32768
1168
1169 /* Win32 version of capturing a directory tree */
1170 int
1171 win32_build_dentry_tree(struct wim_dentry **root_ret,
1172                         const wchar_t *root_disk_path,
1173                         struct add_image_params *params)
1174 {
1175         size_t path_nchars;
1176         wchar_t *path;
1177         int ret;
1178         struct win32_capture_state state;
1179         unsigned vol_flags;
1180         DWORD dret;
1181
1182         path_nchars = wcslen(root_disk_path);
1183         if (path_nchars > WINDOWS_NT_MAX_PATH)
1184                 return WIMLIB_ERR_INVALID_PARAM;
1185
1186         ret = win32_get_file_and_vol_ids(root_disk_path,
1187                                          &params->capture_root_ino,
1188                                          &params->capture_root_dev);
1189         if (ret) {
1190                 ERROR_WITH_ERRNO("Can't open %ls", root_disk_path);
1191                 return ret;
1192         }
1193
1194         win32_get_vol_flags(root_disk_path, &vol_flags, NULL);
1195
1196         /* WARNING: There is no check for overflow later when this buffer is
1197          * being used!  But it's as long as the maximum path length understood
1198          * by Windows NT (which is NOT the same as MAX_PATH). */
1199         path = MALLOC((WINDOWS_NT_MAX_PATH + 1) * sizeof(wchar_t));
1200         if (!path)
1201                 return WIMLIB_ERR_NOMEM;
1202
1203         /* Translate into full path  */
1204         dret = GetFullPathName(root_disk_path, WINDOWS_NT_MAX_PATH - 3,
1205                                &path[4], NULL);
1206
1207         if (dret == 0 || dret >= WINDOWS_NT_MAX_PATH - 3) {
1208                 ERROR("Can't get full path name for \"%ls\"", root_disk_path);
1209                 return WIMLIB_ERR_UNSUPPORTED;
1210         }
1211
1212         /* Add \??\ prefix  */
1213         wmemcpy(path, L"\\??\\", 4);
1214         path_nchars = dret + 4;
1215
1216        /* Strip trailing slashes.  If we don't do this, we may create a path
1217         * with multiple consecutive backslashes, which for some reason causes
1218         * Windows to report that the file cannot be found.  */
1219         while (path_nchars >= 2 &&
1220                path[path_nchars - 1] == L'\\' &&
1221                path[path_nchars - 2] != L':')
1222         {
1223                 path[--path_nchars] = L'\0';
1224         }
1225
1226         params->capture_root_nchars = path_nchars;
1227
1228         memset(&state, 0, sizeof(state));
1229         ret = win32_build_dentry_tree_recursive(root_ret, NULL,
1230                                                 path, path_nchars, L"", 0,
1231                                                 params, &state, vol_flags);
1232         FREE(path);
1233         if (ret == 0)
1234                 win32_do_capture_warnings(root_disk_path, &state, params->add_flags);
1235         return ret;
1236 }
1237
1238 #endif /* __WIN32__ */