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   1 /*
   2  * ntfs-apply.c
   3  *
   4  * Apply a WIM image to a NTFS volume.  We restore everything we can, including
   5  * security data and alternate data streams.
   6  */
   7
   8 /*
   9  * Copyright (C) 2012 Eric Biggers
  10  *
  11  * This file is part of wimlib, a library for working with WIM files.
  12  *
  13  * wimlib is free software; you can redistribute it and/or modify it under the
  14  * terms of the GNU General Public License as published by the Free
  15  * Software Foundation; either version 3 of the License, or (at your option)
  16  * any later version.
  17  *
  18  * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
  19  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  20  * A PARTICULAR PURPOSE. See the GNU General Public License for more
  21  * details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with wimlib; if not, see http://www.gnu.org/licenses/.
  25  */
  26
  27 #include "config.h"
  28 #include "wimlib_internal.h"
  29
  30
  31 #ifdef WITH_NTFS_3G
  32 #include "dentry.h"
  33 #include "lookup_table.h"
  34 #include "io.h"
  35 #include <ntfs-3g/layout.h>
  36 #include <ntfs-3g/acls.h>
  37 #include <ntfs-3g/attrib.h>
  38 #include <ntfs-3g/misc.h>
  39 #include <ntfs-3g/reparse.h>
  40 #include <ntfs-3g/security.h>
  41 #include <ntfs-3g/volume.h>
  42 #include <stdlib.h>
  43 #include <unistd.h>
  44
  45 struct ntfs_apply_args {
  46         ntfs_volume *vol;
  47         int extract_flags;
  48         WIMStruct *w;
  49 };
  50
  51
  52 #ifndef WITH_NEW_NTFS_3G
  53 extern int ntfs_set_inode_security(ntfs_inode *ni, u32 selection,
  54                                    const char *attr);
  55 extern int ntfs_set_inode_attributes(ntfs_inode *ni, u32 attrib);
  56 #endif
  57
  58 /*
  59  * Extracts a WIM resource to a NTFS attribute.
  60  */
  61 static int
  62 extract_wim_resource_to_ntfs_attr(const struct lookup_table_entry *lte,
  63                                   ntfs_attr *na)
  64 {
  65         u64 bytes_remaining = wim_resource_size(lte);
  66         u8 buf[min(WIM_CHUNK_SIZE, bytes_remaining)];
  67         u64 offset = 0;
  68         int ret = 0;
  69         u8 hash[SHA1_HASH_SIZE];
  70
  71         SHA_CTX ctx;
  72         sha1_init(&ctx);
  73
  74         while (bytes_remaining) {
  75                 u64 to_read = min(bytes_remaining, WIM_CHUNK_SIZE);
  76                 ret = read_wim_resource(lte, buf, to_read, offset, false);
  77                 if (ret != 0)
  78                         break;
  79                 sha1_update(&ctx, buf, to_read);
  80                 if (ntfs_attr_pwrite(na, offset, to_read, buf) != to_read) {
  81                         ERROR_WITH_ERRNO("Error extracting WIM resource");
  82                         return WIMLIB_ERR_WRITE;
  83                 }
  84                 bytes_remaining -= to_read;
  85                 offset += to_read;
  86         }
  87         sha1_final(hash, &ctx);
  88         if (!hashes_equal(hash, lte->hash)) {
  89                 ERROR("Invalid checksum on a WIM resource "
  90                       "(detected when extracting to NTFS stream)");
  91                 ERROR("The following WIM resource is invalid:");
  92                 print_lookup_table_entry(lte);
  93                 return WIMLIB_ERR_INVALID_RESOURCE_HASH;
  94         }
  95         return 0;
  96 }
  97
  98 /* Writes the data streams to a NTFS file
  99  *
 100  * @ni:      The NTFS inode for the file.
 101  * @dentry:  The directory entry in the WIM file.
 102  * @w:       The WIMStruct for the WIM containing the image we are applying.
 103  *
 104  * Returns 0 on success, nonzero on failure.
 105  */
 106 static int write_ntfs_data_streams(ntfs_inode *ni, const struct dentry *dentry,
 107                                    WIMStruct *w)
 108 {
 109         int ret = 0;
 110         unsigned stream_idx = 0;
 111         ntfschar *stream_name = AT_UNNAMED;
 112         u32 stream_name_len = 0;
 113
 114         DEBUG("Writing %u NTFS data stream%s for `%s'",
 115               dentry->num_ads + 1,
 116               (dentry->num_ads == 0 ? "" : "s"),
 117               dentry->full_path_utf8);
 118
 119         while (1) {
 120                 struct lookup_table_entry *lte;
 121                 ntfs_attr *na;
 122
 123                 lte = dentry_stream_lte(dentry, stream_idx, w->lookup_table);
 124
 125                 if (stream_name_len) {
 126                         /* Create an empty named stream. */
 127                         ret = ntfs_attr_add(ni, AT_DATA, stream_name,
 128                                             stream_name_len, NULL, 0);
 129                         if (ret != 0) {
 130                                 ERROR_WITH_ERRNO("Failed to create name data "
 131                                                  "stream for extracted file "
 132                                                  "`%s'",
 133                                                  dentry->full_path_utf8);
 134                                 ret = WIMLIB_ERR_NTFS_3G;
 135                                 break;
 136
 137                         }
 138                 }
 139                 /* If there's no lookup table entry, it's an empty stream.
 140                  * Otherwise, we must open the attribute and extract the data.
 141                  * */
 142                 if (lte) {
 143                         na = ntfs_attr_open(ni, AT_DATA, stream_name, stream_name_len);
 144                         if (!na) {
 145                                 ERROR_WITH_ERRNO("Failed to open a data stream of "
 146                                                  "extracted file `%s'",
 147                                                  dentry->full_path_utf8);
 148                                 ret = WIMLIB_ERR_NTFS_3G;
 149                                 break;
 150                         }
 151                         ret = extract_wim_resource_to_ntfs_attr(lte, na);
 152                         if (ret != 0)
 153                                 break;
 154                         ntfs_attr_close(na);
 155                 }
 156                 if (stream_idx == dentry->num_ads)
 157                         break;
 158                 stream_name = (ntfschar*)dentry->ads_entries[stream_idx].stream_name;
 159                 stream_name_len = dentry->ads_entries[stream_idx].stream_name_len / 2;
 160                 stream_idx++;
 161         }
 162         return ret;
 163 }
 164
 165 /*
 166  * Makes a NTFS hard link
 167  *
 168  * It is named @from_dentry->file_name and is located under the directory
 169  * specified by @dir_ni, and it is made to point to the previously extracted
 170  * file located at @to_dentry->extracted_file.
 171  *
 172  * Return 0 on success, nonzero on failure.
 173  */
 174 static int wim_apply_hardlink_ntfs(const struct dentry *from_dentry,
 175                                    const struct dentry *to_dentry,
 176                                    ntfs_inode *dir_ni,
 177                                    ntfs_inode **to_ni_ret)
 178 {
 179         int ret;
 180         char *p;
 181         char orig;
 182         const char *dir_name;
 183
 184         ntfs_inode *to_ni;
 185         ntfs_volume *vol;
 186
 187         wimlib_assert(dentry_is_regular_file(from_dentry)
 188                         && dentry_is_regular_file(to_dentry));
 189
 190         if (ntfs_inode_close(dir_ni) != 0) {
 191                 ERROR_WITH_ERRNO("Error closing directory");
 192                 return WIMLIB_ERR_NTFS_3G;
 193         }
 194
 195         vol = dir_ni->vol;
 196
 197         DEBUG("Extracting NTFS hard link `%s' => `%s'",
 198               from_dentry->full_path_utf8, to_dentry->extracted_file);
 199
 200         to_ni = ntfs_pathname_to_inode(vol, NULL,
 201                                        to_dentry->extracted_file);
 202         if (!to_ni) {
 203                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 204                                  to_dentry->extracted_file);
 205                 return WIMLIB_ERR_NTFS_3G;
 206         }
 207         p = from_dentry->full_path_utf8 + from_dentry->full_path_utf8_len;
 208         do {
 209                 p--;
 210         } while (*p != '/');
 211
 212         orig = *p;
 213         *p = '\0';
 214         dir_name = from_dentry->full_path_utf8;
 215
 216         dir_ni = ntfs_pathname_to_inode(vol, NULL, dir_name);
 217         if (!dir_ni) {
 218                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 219                                  from_dentry->full_path_utf8);
 220                 *p = orig;
 221                 return WIMLIB_ERR_NTFS_3G;
 222         }
 223         *p = orig;
 224
 225         ret = ntfs_link(to_ni, dir_ni,
 226                         (ntfschar*)from_dentry->file_name,
 227                         from_dentry->file_name_len / 2);
 228         if (ret != 0) {
 229                 ERROR_WITH_ERRNO("Could not create hard link `%s' => `%s'",
 230                                  from_dentry->full_path_utf8,
 231                                  to_dentry->extracted_file);
 232                 ret = WIMLIB_ERR_NTFS_3G;
 233         }
 234         *to_ni_ret = to_ni;
 235         return ret;
 236 }
 237
 238 static int
 239 apply_file_attributes_and_security_data(ntfs_inode *ni,
 240                                         const struct dentry *dentry,
 241                                         const WIMStruct *w)
 242 {
 243         DEBUG("Setting NTFS file attributes on `%s' to %#"PRIx32,
 244               dentry->full_path_utf8, dentry->attributes);
 245         if (ntfs_set_inode_attributes(ni, dentry->attributes)) {
 246                 ERROR("Failed to set NTFS file attributes on `%s'",
 247                        dentry->full_path_utf8);
 248                 return WIMLIB_ERR_NTFS_3G;
 249         }
 250
 251         if (dentry->security_id != -1) {
 252                 const struct wim_security_data *sd;
 253
 254                 sd = wim_const_security_data(w);
 255                 wimlib_assert(dentry->security_id < sd->num_entries);
 256                 DEBUG("Applying security descriptor %d to `%s'",
 257                       dentry->security_id, dentry->full_path_utf8);
 258                 u32 selection = OWNER_SECURITY_INFORMATION |
 259                                 GROUP_SECURITY_INFORMATION |
 260                                 DACL_SECURITY_INFORMATION  |
 261                                 SACL_SECURITY_INFORMATION;
 262
 263                 if (ntfs_set_inode_security(ni, selection,
 264                                             (const char*)sd->descriptors[dentry->security_id]))
 265                 {
 266                         ERROR_WITH_ERRNO("Failed to set security data on `%s'",
 267                                         dentry->full_path_utf8);
 268                         return WIMLIB_ERR_NTFS_3G;
 269                 }
 270         }
 271         return 0;
 272 }
 273
 274 static int apply_reparse_data(ntfs_inode *ni, const struct dentry *dentry,
 275                               const WIMStruct *w)
 276 {
 277         struct lookup_table_entry *lte;
 278         int ret = 0;
 279
 280         wimlib_assert(dentry->attributes & FILE_ATTRIBUTE_REPARSE_POINT);
 281
 282         lte = dentry_unnamed_lte(dentry, w->lookup_table);
 283
 284         DEBUG("Applying reparse data to `%s'", dentry->full_path_utf8);
 285
 286         if (!lte) {
 287                 ERROR("Could not find reparse data for `%s'",
 288                       dentry->full_path_utf8);
 289                 return WIMLIB_ERR_INVALID_DENTRY;
 290         }
 291
 292         if (wim_resource_size(lte) >= 0xffff) {
 293                 ERROR("Reparse data of `%s' is too long (%lu bytes)",
 294                       dentry->full_path_utf8, wim_resource_size(lte));
 295                 return WIMLIB_ERR_INVALID_DENTRY;
 296         }
 297
 298         u8 reparse_data_buf[8 + wim_resource_size(lte)];
 299         u8 *p = reparse_data_buf;
 300         p = put_u32(p, dentry->reparse_tag); /* ReparseTag */
 301         p = put_u16(p, wim_resource_size(lte)); /* ReparseDataLength */
 302         p = put_u16(p, 0); /* Reserved */
 303
 304         ret = read_full_wim_resource(lte, p);
 305         if (ret != 0)
 306                 return ret;
 307
 308         ret = ntfs_set_ntfs_reparse_data(ni, (char*)reparse_data_buf,
 309                                          wim_resource_size(lte) + 8, 0);
 310         if (ret != 0) {
 311                 ERROR_WITH_ERRNO("Failed to set NTFS reparse data on `%s'",
 312                                  dentry->full_path_utf8);
 313                 return WIMLIB_ERR_NTFS_3G;
 314         }
 315         return 0;
 316 }
 317
 318 static int do_wim_apply_dentry_ntfs(struct dentry *dentry, ntfs_inode *dir_ni,
 319                                     WIMStruct *w);
 320
 321 /*
 322  * If @dentry is part of a hard link group, search for hard-linked dentries in
 323  * the same directory that have a nonempty DOS (short) filename.  There should
 324  * be exactly 0 or 1 such dentries.  If there is 1, extract that dentry first,
 325  * so that the DOS name is correctly associated with the corresponding long name
 326  * in the Win32 namespace, and not any of the additional names in the POSIX
 327  * namespace created from hard links.
 328  */
 329 static int preapply_dentry_with_dos_name(struct dentry *dentry,
 330                                          ntfs_inode **dir_ni_p,
 331                                          WIMStruct *w)
 332 {
 333         int ret;
 334         struct dentry *other;
 335         struct dentry *dentry_with_dos_name;
 336
 337         if (dentry->link_group_list.next == &dentry->link_group_list)
 338                 return 0;
 339
 340         dentry_with_dos_name = NULL;
 341         list_for_each_entry(other, &dentry->link_group_list,
 342                             link_group_list)
 343         {
 344                 if (dentry->parent == other->parent && other->short_name_len) {
 345                         if (dentry_with_dos_name) {
 346                                 ERROR("Found multiple DOS names for file `%s' "
 347                                       "in the same directory",
 348                                       dentry_with_dos_name->full_path_utf8);
 349                                 return WIMLIB_ERR_INVALID_DENTRY;
 350                         }
 351                         dentry_with_dos_name = other;
 352                 }
 353         }
 354         /* If there's a dentry with a DOS name, extract it first */
 355         if (dentry_with_dos_name
 356             && !dentry_with_dos_name->extracted_file)
 357         {
 358                 char *p;
 359                 const char *dir_name;
 360                 char orig;
 361                 ntfs_volume *vol = (*dir_ni_p)->vol;
 362
 363                 DEBUG("pre-applying DOS name `%s'",
 364                       dentry_with_dos_name->full_path_utf8);
 365                 ret = do_wim_apply_dentry_ntfs(dentry_with_dos_name,
 366                                                *dir_ni_p, w);
 367                 if (ret != 0)
 368                         return ret;
 369                 p = dentry->full_path_utf8 + dentry->full_path_utf8_len;
 370                 do {
 371                         p--;
 372                 } while (*p != '/');
 373
 374                 orig = *p;
 375                 *p = '\0';
 376                 dir_name = dentry->full_path_utf8;
 377
 378                 *dir_ni_p = ntfs_pathname_to_inode(vol, NULL, dir_name);
 379                 *p = orig;
 380                 if (!*dir_ni_p) {
 381                         ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 382                                          dir_name);
 383                         return WIMLIB_ERR_NTFS_3G;
 384                 }
 385         }
 386         return 0;
 387 }
 388
 389 /*
 390  * Applies a WIM dentry to a NTFS filesystem.
 391  *
 392  * @dentry:  The WIM dentry to apply
 393  * @dir_ni:  The NTFS inode for the parent directory
 394  * @w:       The WIMStruct for the WIM containing the image we are applying.
 395  *
 396  * @return:  0 on success; nonzero on failure.
 397  */
 398 static int do_wim_apply_dentry_ntfs(struct dentry *dentry, ntfs_inode *dir_ni,
 399                                     WIMStruct *w)
 400 {
 401         int ret = 0;
 402         mode_t type;
 403         ntfs_inode *ni = NULL;
 404         bool is_hardlink = false;
 405         ntfs_volume *vol = dir_ni->vol;
 406
 407         if (dentry->attributes & FILE_ATTRIBUTE_DIRECTORY) {
 408                 type = S_IFDIR;
 409         } else {
 410                 struct dentry *other;
 411
 412                 /* Apply hard-linked directory in same directory with DOS name
 413                  * (if there is one) before this dentry */
 414                 ret = preapply_dentry_with_dos_name(dentry, &dir_ni, w);
 415                 if (ret != 0)
 416                         return ret;
 417
 418                 type = S_IFREG;
 419                 /* See if we can make a hard link */
 420                 list_for_each_entry(other, &dentry->link_group_list,
 421                                     link_group_list) {
 422                         if (other->extracted_file) {
 423                                 /* Already extracted another dentry in the hard
 424                                  * link group.  We can make a hard link instead
 425                                  * of extracting the file data. */
 426                                 ret = wim_apply_hardlink_ntfs(dentry, other,
 427                                                               dir_ni, &ni);
 428                                 is_hardlink = true;
 429                                 if (ret != 0)
 430                                         goto out_close_dir_ni;
 431                                 else
 432                                         goto out_set_dos_name;
 433                         }
 434                 }
 435                 /* Can't make a hard link; extract the file itself */
 436                 FREE(dentry->extracted_file);
 437                 dentry->extracted_file = STRDUP(dentry->full_path_utf8);
 438                 if (!dentry->extracted_file) {
 439                         ERROR("Failed to allocate memory for filename");
 440                         return WIMLIB_ERR_NOMEM;
 441                 }
 442         }
 443
 444         /*
 445          * Create a directory or file.
 446          *
 447          * Note: For symbolic links that are not directory junctions, pass
 448          * S_IFREG here, since we manually set the reparse data later.
 449          */
 450         ni = ntfs_create(dir_ni, 0, (ntfschar*)dentry->file_name,
 451                          dentry->file_name_len / 2, type);
 452
 453         if (!ni) {
 454                 ERROR_WITH_ERRNO("Could not create NTFS object for `%s'",
 455                                  dentry->full_path_utf8);
 456                 ret = WIMLIB_ERR_NTFS_3G;
 457                 goto out_close_dir_ni;
 458         }
 459
 460         /* Write the data streams, unless this is a directory or reparse point
 461          * */
 462         if (!dentry_is_directory(dentry) &&
 463              !(dentry->attributes & FILE_ATTRIBUTE_REPARSE_POINT)) {
 464                 ret = write_ntfs_data_streams(ni, dentry, w);
 465                 if (ret != 0)
 466                         goto out_close_dir_ni;
 467         }
 468
 469
 470         ret = apply_file_attributes_and_security_data(ni, dentry, w);
 471         if (ret != 0)
 472                 goto out_close_dir_ni;
 473
 474         if (dentry->attributes & FILE_ATTR_REPARSE_POINT) {
 475                 ret = apply_reparse_data(ni, dentry, w);
 476                 if (ret != 0)
 477                         goto out_close_dir_ni;
 478         }
 479
 480 out_set_dos_name:
 481         /* Set DOS (short) name if given */
 482         if (dentry->short_name_len != 0) {
 483
 484                 char *short_name_utf8;
 485                 size_t short_name_utf8_len;
 486                 short_name_utf8 = utf16_to_utf8(dentry->short_name,
 487                                                 dentry->short_name_len,
 488                                                 &short_name_utf8_len);
 489                 if (!short_name_utf8) {
 490                         ERROR("Out of memory");
 491                         ret = WIMLIB_ERR_NOMEM;
 492                         goto out_close_dir_ni;
 493                 }
 494
 495                 if (is_hardlink) {
 496                         char *p;
 497                         char orig;
 498                         const char *dir_name;
 499
 500                         /* ntfs_set_ntfs_dos_name() closes the inodes in the
 501                          * wrong order if we have applied a hard link.   Close
 502                          * them ourselves, then re-open then. */
 503                         if (ntfs_inode_close(dir_ni) != 0) {
 504                                 if (ret == 0)
 505                                         ret = WIMLIB_ERR_NTFS_3G;
 506                                 ERROR_WITH_ERRNO("Failed to close directory inode");
 507                         }
 508                         if (ntfs_inode_close(ni) != 0) {
 509                                 if (ret == 0)
 510                                         ret = WIMLIB_ERR_NTFS_3G;
 511                                 ERROR_WITH_ERRNO("Failed to close hard link target inode");
 512                         }
 513                         p = dentry->full_path_utf8 + dentry->full_path_utf8_len;
 514                         do {
 515                                 p--;
 516                         } while (*p != '/');
 517
 518                         orig = *p;
 519                         *p = '\0';
 520                         dir_name = dentry->full_path_utf8;
 521
 522                         dir_ni = ntfs_pathname_to_inode(vol, NULL, dir_name);
 523                         *p = orig;
 524                         if (!dir_ni) {
 525                                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 526                                                  dir_name);
 527                                 return WIMLIB_ERR_NTFS_3G;
 528                         }
 529                         ni = ntfs_pathname_to_inode(vol, dir_ni,
 530                                                     dentry->file_name_utf8);
 531                         if (!ni) {
 532                                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 533                                                  dir_name);
 534                                 return WIMLIB_ERR_NTFS_3G;
 535                         }
 536                 }
 537
 538                 DEBUG("Setting short (DOS) name of `%s' to %s",
 539                       dentry->full_path_utf8, short_name_utf8);
 540
 541                 ret = ntfs_set_ntfs_dos_name(ni, dir_ni, short_name_utf8,
 542                                              short_name_utf8_len, 0);
 543                 FREE(short_name_utf8);
 544                 if (ret != 0) {
 545                         ERROR_WITH_ERRNO("Could not set DOS (short) name for `%s'",
 546                                          dentry->full_path_utf8);
 547                         ret = WIMLIB_ERR_NTFS_3G;
 548                 }
 549                 /* inodes have been closed by ntfs_set_ntfs_dos_name(). */
 550                 return ret;
 551         }
 552
 553 out_close_dir_ni:
 554         if (ntfs_inode_close(dir_ni) != 0) {
 555                 if (ret == 0)
 556                         ret = WIMLIB_ERR_NTFS_3G;
 557                 ERROR_WITH_ERRNO("Failed to close directory inode");
 558         }
 559         if (ni && ntfs_inode_close(ni) != 0) {
 560                 if (ret == 0)
 561                         ret = WIMLIB_ERR_NTFS_3G;
 562                 ERROR_WITH_ERRNO("Failed to close inode");
 563         }
 564         return ret;
 565 }
 566
 567 static int wim_apply_root_dentry_ntfs(const struct dentry *dentry,
 568                                       ntfs_volume *vol,
 569                                       const WIMStruct *w)
 570 {
 571         ntfs_inode *ni;
 572         int ret = 0;
 573
 574         wimlib_assert(dentry_is_directory(dentry));
 575         ni = ntfs_pathname_to_inode(vol, NULL, "/");
 576         if (!ni) {
 577                 ERROR_WITH_ERRNO("Could not find root NTFS inode");
 578                 return WIMLIB_ERR_NTFS_3G;
 579         }
 580         ret = apply_file_attributes_and_security_data(ni, dentry, w);
 581         if (ntfs_inode_close(ni) != 0) {
 582                 ERROR_WITH_ERRNO("Failed to close NTFS inode for root "
 583                                  "directory");
 584                 ret = WIMLIB_ERR_NTFS_3G;
 585         }
 586         return ret;
 587 }
 588
 589 /* Applies a WIM dentry to the NTFS volume */
 590 static int wim_apply_dentry_ntfs(struct dentry *dentry, void *arg)
 591 {
 592         struct ntfs_apply_args *args = arg;
 593         ntfs_volume *vol             = args->vol;
 594         int extract_flags            = args->extract_flags;
 595         WIMStruct *w                 = args->w;
 596         ntfs_inode *dir_ni;
 597         char *p;
 598         char orig;
 599         const char *dir_name;
 600
 601         if (dentry->extracted_file)
 602                 return 0;
 603
 604         wimlib_assert(dentry->full_path_utf8);
 605
 606         DEBUG("Applying dentry `%s' to NTFS", dentry->full_path_utf8);
 607
 608         if (extract_flags & WIMLIB_EXTRACT_FLAG_VERBOSE)
 609                 puts(dentry->full_path_utf8);
 610
 611         if (dentry_is_root(dentry))
 612                 return wim_apply_root_dentry_ntfs(dentry, vol, w);
 613
 614         p = dentry->full_path_utf8 + dentry->full_path_utf8_len;
 615         do {
 616                 p--;
 617         } while (*p != '/');
 618
 619         orig = *p;
 620         *p = '\0';
 621         dir_name = dentry->full_path_utf8;
 622
 623         dir_ni = ntfs_pathname_to_inode(vol, NULL, dir_name);
 624         if (dir_ni)
 625                 DEBUG("Found NTFS inode for `%s'", dir_name);
 626         *p = orig;
 627         if (!dir_ni) {
 628                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 629                                  dir_name);
 630                 return WIMLIB_ERR_NTFS_3G;
 631         }
 632         return do_wim_apply_dentry_ntfs(dentry, dir_ni, w);
 633 }
 634
 635 static int wim_apply_dentry_timestamps(struct dentry *dentry, void *arg)
 636 {
 637         struct ntfs_apply_args *args = arg;
 638         ntfs_volume *vol             = args->vol;
 639         u8 *p;
 640         u8 buf[24];
 641         ntfs_inode *ni;
 642         int ret = 0;
 643
 644
 645         DEBUG("Setting timestamps on `%s'", dentry->full_path_utf8);
 646
 647         ni = ntfs_pathname_to_inode(vol, NULL, dentry->full_path_utf8);
 648         if (!ni) {
 649                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 650                                  dentry->full_path_utf8);
 651                 return WIMLIB_ERR_NTFS_3G;
 652         }
 653
 654         p = buf;
 655         p = put_u64(p, dentry->creation_time);
 656         p = put_u64(p, dentry->last_write_time);
 657         p = put_u64(p, dentry->last_access_time);
 658         ret = ntfs_inode_set_times(ni, (const char*)buf, 3 * sizeof(u64), 0);
 659         if (ret != 0) {
 660                 ERROR_WITH_ERRNO("Failed to set NTFS timestamps on `%s'",
 661                                  dentry->full_path_utf8);
 662                 ret = WIMLIB_ERR_NTFS_3G;
 663         }
 664
 665         if (ntfs_inode_close(ni) != 0) {
 666                 if (ret == 0)
 667                         ret = WIMLIB_ERR_NTFS_3G;
 668                 ERROR_WITH_ERRNO("Failed to close NTFS inode for `%s'",
 669                                  dentry->full_path_utf8);
 670         }
 671         return ret;
 672 }
 673
 674 static int do_wim_apply_image_ntfs(WIMStruct *w, const char *device, int extract_flags)
 675 {
 676         ntfs_volume *vol;
 677         int ret;
 678
 679         DEBUG("Mounting NTFS volume `%s'", device);
 680         vol = ntfs_mount(device, 0);
 681         if (!vol) {
 682                 ERROR_WITH_ERRNO("Failed to mount NTFS volume `%s'", device);
 683                 return WIMLIB_ERR_NTFS_3G;
 684         }
 685         struct ntfs_apply_args args = {
 686                 .vol           = vol,
 687                 .extract_flags = extract_flags,
 688                 .w             = w,
 689         };
 690         ret = for_dentry_in_tree(wim_root_dentry(w), wim_apply_dentry_ntfs,
 691                                  &args);
 692
 693         if (ret != 0)
 694                 goto out;
 695         if (extract_flags & WIMLIB_EXTRACT_FLAG_VERBOSE)
 696                 printf("Setting timestamps of extracted files on NTFS "
 697                        "volume `%s'\n", device);
 698         ret = for_dentry_in_tree_depth(wim_root_dentry(w),
 699                                        wim_apply_dentry_timestamps,
 700                                        &args);
 701         if (ret == 0 && (extract_flags & WIMLIB_EXTRACT_FLAG_VERBOSE))
 702                 printf("Finished applying image %d of %s to NTFS "
 703                        "volume `%s'\n",
 704                        w->current_image,
 705                        w->filename ? w->filename : "WIM",
 706                        device);
 707 out:
 708         DEBUG("Unmounting NTFS volume `%s'", device);
 709         if (ntfs_umount(vol, FALSE) != 0) {
 710                 ERROR_WITH_ERRNO("Failed to unmount NTFS volume `%s'", device);
 711                 if (ret == 0)
 712                         ret = WIMLIB_ERR_NTFS_3G;
 713         }
 714         return ret;
 715 }
 716
 717
 718 /*
 719  * API entry point for applying a WIM image to a NTFS volume.
 720  *
 721  * Please note that this is a NTFS *volume* and not a directory.  The intention
 722  * is that the volume contain an empty filesystem, and the WIM image contain a
 723  * full filesystem to be applied to the volume.
 724  */
 725 WIMLIBAPI int wimlib_apply_image_to_ntfs_volume(WIMStruct *w, int image,
 726                                                 const char *device, int flags)
 727 {
 728         int ret;
 729
 730         if (!device)
 731                 return WIMLIB_ERR_INVALID_PARAM;
 732         if (image == WIM_ALL_IMAGES) {
 733                 ERROR("Can only apply a single image when applying "
 734                       "directly to a NTFS volume");
 735                 return WIMLIB_ERR_INVALID_PARAM;
 736         }
 737         if (flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK)) {
 738                 ERROR("Cannot specify symlink or hardlink flags when applying ");
 739                 ERROR("directly to a NTFS volume");
 740                 return WIMLIB_ERR_INVALID_PARAM;
 741         }
 742         ret = wimlib_select_image(w, image);
 743         if (ret != 0)
 744                 return ret;
 745
 746         return do_wim_apply_image_ntfs(w, device, flags);
 747 }
 748
 749 #else /* WITH_NTFS_3G */
 750 WIMLIBAPI int wimlib_apply_image_to_ntfs_volume(WIMStruct *w, int image,
 751                                                 const char *device, int flags)
 752 {
 753         ERROR("wimlib was compiled without support for NTFS-3g, so");
 754         ERROR("we cannot apply a WIM image directly to a NTFS volume");
 755         return WIMLIB_ERR_UNSUPPORTED;
 756 }
 757 #endif /* WITH_NTFS_3G */