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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 Lesser General Public License as published by the Free
  15  * Software Foundation; either version 2.1 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 Lesser General Public License for more
  21  * details.
  22  *
  23  * You should have received a copy of the GNU Lesser 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 extern int ntfs_inode_set_security(ntfs_inode *ni, u32 selection,
  52                                    const char *attr);
  53 extern int ntfs_inode_set_attributes(ntfs_inode *ni, s32 attrib);
  54
  55 /*
  56  * Extracts a WIM resource to a NTFS attribute.
  57  */
  58 static int
  59 extract_wim_resource_to_ntfs_attr(const struct lookup_table_entry *lte,
  60                                   ntfs_attr *na)
  61 {
  62         u64 bytes_remaining = wim_resource_size(lte);
  63         u8 buf[min(WIM_CHUNK_SIZE, bytes_remaining)];
  64         u64 offset = 0;
  65         int ret = 0;
  66         u8 hash[SHA1_HASH_SIZE];
  67
  68         SHA_CTX ctx;
  69         sha1_init(&ctx);
  70
  71         while (bytes_remaining) {
  72                 u64 to_read = min(bytes_remaining, WIM_CHUNK_SIZE);
  73                 ret = read_wim_resource(lte, buf, to_read, offset, false);
  74                 if (ret != 0)
  75                         break;
  76                 sha1_update(&ctx, buf, to_read);
  77                 if (ntfs_attr_pwrite(na, offset, to_read, buf) != to_read) {
  78                         ERROR_WITH_ERRNO("Error extracting WIM resource");
  79                         return WIMLIB_ERR_WRITE;
  80                 }
  81                 bytes_remaining -= to_read;
  82                 offset += to_read;
  83         }
  84         sha1_final(hash, &ctx);
  85         if (!hashes_equal(hash, lte->hash)) {
  86                 ERROR("Invalid checksum on a WIM resource "
  87                       "(detected when extracting to NTFS stream)");
  88                 ERROR("The following WIM resource is invalid:");
  89                 print_lookup_table_entry(lte);
  90                 return WIMLIB_ERR_INVALID_RESOURCE_HASH;
  91         }
  92         return 0;
  93 }
  94
  95 /* Writes the data streams to a NTFS file
  96  *
  97  * @ni:      The NTFS inode for the file.
  98  * @dentry:  The directory entry in the WIM file.
  99  * @w:       The WIMStruct for the WIM containing the image we are applying.
 100  *
 101  * Returns 0 on success, nonzero on failure.
 102  */
 103 static int write_ntfs_data_streams(ntfs_inode *ni, const struct dentry *dentry,
 104                                    WIMStruct *w)
 105 {
 106         int ret = 0;
 107         unsigned stream_idx = 0;
 108         ntfschar *stream_name = AT_UNNAMED;
 109         u32 stream_name_len = 0;
 110
 111         DEBUG("Writing %u NTFS data stream%s for `%s'",
 112               dentry->num_ads + 1,
 113               (dentry->num_ads == 0 ? "" : "s"),
 114               dentry->full_path_utf8);
 115
 116         while (1) {
 117                 struct lookup_table_entry *lte;
 118                 ntfs_attr *na;
 119
 120                 lte = dentry_stream_lte(dentry, stream_idx, w->lookup_table);
 121
 122                 if (stream_name_len) {
 123                         /* Create an empty named stream. */
 124                         ret = ntfs_attr_add(ni, AT_DATA, stream_name,
 125                                             stream_name_len, NULL, 0);
 126                         if (ret != 0) {
 127                                 ERROR_WITH_ERRNO("Failed to create name data "
 128                                                  "stream for extracted file "
 129                                                  "`%s'",
 130                                                  dentry->full_path_utf8);
 131                                 ret = WIMLIB_ERR_NTFS_3G;
 132                                 break;
 133
 134                         }
 135                 }
 136                 /* If there's no lookup table entry, it's an empty stream.
 137                  * Otherwise, we must open the attribute and extract the data.
 138                  * */
 139                 if (lte) {
 140                         na = ntfs_attr_open(ni, AT_DATA, stream_name, stream_name_len);
 141                         if (!na) {
 142                                 ERROR_WITH_ERRNO("Failed to open a data stream of "
 143                                                  "extracted file `%s'",
 144                                                  dentry->full_path_utf8);
 145                                 ret = WIMLIB_ERR_NTFS_3G;
 146                                 break;
 147                         }
 148                         ret = extract_wim_resource_to_ntfs_attr(lte, na);
 149                         if (ret != 0)
 150                                 break;
 151                         ntfs_attr_close(na);
 152                 }
 153                 if (stream_idx == dentry->num_ads)
 154                         break;
 155                 stream_name = (ntfschar*)dentry->ads_entries[stream_idx].stream_name;
 156                 stream_name_len = dentry->ads_entries[stream_idx].stream_name_len / 2;
 157                 stream_idx++;
 158         }
 159         return ret;
 160 }
 161
 162 /*
 163  * Makes a NTFS hard link
 164  *
 165  * It is named @from_dentry->file_name and is located under the directory
 166  * specified by @dir_ni, and it is made to point to the previously extracted
 167  * file located at @to_dentry->extracted_file.
 168  *
 169  * Return 0 on success, nonzero on failure.
 170  */
 171 static int wim_apply_hardlink_ntfs(const struct dentry *from_dentry,
 172                                    const struct dentry *to_dentry,
 173                                    ntfs_inode *dir_ni,
 174                                    ntfs_inode **to_ni_ret)
 175 {
 176         int ret;
 177         char *p;
 178         char orig;
 179         const char *dir_name;
 180
 181         ntfs_inode *to_ni;
 182         ntfs_volume *vol;
 183
 184         wimlib_assert(dentry_is_regular_file(from_dentry)
 185                         && dentry_is_regular_file(to_dentry));
 186
 187         if (ntfs_inode_close(dir_ni) != 0) {
 188                 ERROR_WITH_ERRNO("Error closing directory");
 189                 return WIMLIB_ERR_NTFS_3G;
 190         }
 191
 192         vol = dir_ni->vol;
 193
 194         DEBUG("Extracting NTFS hard link `%s' => `%s'",
 195               from_dentry->full_path_utf8, to_dentry->extracted_file);
 196
 197         to_ni = ntfs_pathname_to_inode(vol, NULL,
 198                                        to_dentry->extracted_file);
 199         if (!to_ni) {
 200                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 201                                  to_dentry->extracted_file);
 202                 return WIMLIB_ERR_NTFS_3G;
 203         }
 204         p = from_dentry->full_path_utf8 + from_dentry->full_path_utf8_len;
 205         do {
 206                 p--;
 207         } while (*p != '/');
 208
 209         orig = *p;
 210         *p = '\0';
 211         dir_name = from_dentry->full_path_utf8;
 212
 213         dir_ni = ntfs_pathname_to_inode(vol, NULL, dir_name);
 214         if (!dir_ni) {
 215                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 216                                  from_dentry->full_path_utf8);
 217                 *p = orig;
 218                 return WIMLIB_ERR_NTFS_3G;
 219         }
 220         *p = orig;
 221
 222         ret = ntfs_link(to_ni, dir_ni,
 223                         (ntfschar*)from_dentry->file_name,
 224                         from_dentry->file_name_len / 2);
 225         if (ret != 0) {
 226                 ERROR_WITH_ERRNO("Could not create hard link `%s' => `%s'",
 227                                  from_dentry->full_path_utf8,
 228                                  to_dentry->extracted_file);
 229                 ret = WIMLIB_ERR_NTFS_3G;
 230         }
 231         *to_ni_ret = to_ni;
 232         return ret;
 233 }
 234
 235 static int
 236 apply_file_attributes_and_security_data(ntfs_inode *ni,
 237                                         const struct dentry *dentry,
 238                                         const WIMStruct *w)
 239 {
 240         DEBUG("Setting NTFS file attributes on `%s' to %#"PRIx32,
 241               dentry->full_path_utf8, dentry->attributes);
 242         if (!ntfs_inode_set_attributes(ni, dentry->attributes)) {
 243                 ERROR("Failed to set NTFS file attributes on `%s'",
 244                        dentry->full_path_utf8);
 245                 return WIMLIB_ERR_NTFS_3G;
 246         }
 247
 248         if (dentry->security_id != -1) {
 249                 const struct wim_security_data *sd;
 250
 251                 sd = wim_const_security_data(w);
 252                 wimlib_assert(dentry->security_id < sd->num_entries);
 253                 DEBUG("Applying security descriptor %d to `%s'",
 254                       dentry->security_id, dentry->full_path_utf8);
 255                 u32 selection = OWNER_SECURITY_INFORMATION |
 256                                 GROUP_SECURITY_INFORMATION |
 257                                 DACL_SECURITY_INFORMATION  |
 258                                 SACL_SECURITY_INFORMATION;
 259
 260                 if (!ntfs_inode_set_security(ni, selection,
 261                                              (const char*)sd->descriptors[dentry->security_id]))
 262                 {
 263                         ERROR_WITH_ERRNO("Failed to set security data on `%s'",
 264                                         dentry->full_path_utf8);
 265                         return WIMLIB_ERR_NTFS_3G;
 266                 }
 267         }
 268         return 0;
 269 }
 270
 271 static int apply_reparse_data(ntfs_inode *ni, const struct dentry *dentry,
 272                               const WIMStruct *w)
 273 {
 274         struct lookup_table_entry *lte;
 275         int ret = 0;
 276
 277         wimlib_assert(dentry->attributes & FILE_ATTRIBUTE_REPARSE_POINT);
 278
 279         lte = dentry_unnamed_lte(dentry, w->lookup_table);
 280
 281         DEBUG("Applying reparse data to `%s'", dentry->full_path_utf8);
 282
 283         if (!lte) {
 284                 ERROR("Could not find reparse data for `%s'",
 285                       dentry->full_path_utf8);
 286                 return WIMLIB_ERR_INVALID_DENTRY;
 287         }
 288
 289         if (wim_resource_size(lte) >= 0xffff) {
 290                 ERROR("Reparse data of `%s' is too long (%lu bytes)",
 291                       dentry->full_path_utf8, wim_resource_size(lte));
 292                 return WIMLIB_ERR_INVALID_DENTRY;
 293         }
 294
 295         u8 reparse_data_buf[8 + wim_resource_size(lte)];
 296         u8 *p = reparse_data_buf;
 297         p = put_u32(p, dentry->reparse_tag); /* ReparseTag */
 298         p = put_u16(p, wim_resource_size(lte)); /* ReparseDataLength */
 299         p = put_u16(p, 0); /* Reserved */
 300
 301         ret = read_full_wim_resource(lte, p);
 302         if (ret != 0)
 303                 return ret;
 304
 305         ret = ntfs_set_ntfs_reparse_data(ni, (char*)reparse_data_buf,
 306                                          wim_resource_size(lte) + 8, 0);
 307         if (ret != 0) {
 308                 ERROR_WITH_ERRNO("Failed to set NTFS reparse data on `%s'",
 309                                  dentry->full_path_utf8);
 310                 return WIMLIB_ERR_NTFS_3G;
 311         }
 312         return 0;
 313 }
 314
 315 static int do_wim_apply_dentry_ntfs(struct dentry *dentry, ntfs_inode *dir_ni,
 316                                     WIMStruct *w);
 317
 318 /*
 319  * If @dentry is part of a hard link group, search for hard-linked dentries in
 320  * the same directory that have a nonempty DOS (short) filename.  There should
 321  * be exactly 0 or 1 such dentries.  If there is 1, extract that dentry first,
 322  * so that the DOS name is correctly associated with the corresponding long name
 323  * in the Win32 namespace, and not any of the additional names in the POSIX
 324  * namespace created from hard links.
 325  */
 326 static int preapply_dentry_with_dos_name(struct dentry *dentry,
 327                                          ntfs_inode **dir_ni_p,
 328                                          WIMStruct *w)
 329 {
 330         int ret;
 331         struct dentry *other;
 332         struct dentry *dentry_with_dos_name;
 333
 334         if (dentry->link_group_list.next == &dentry->link_group_list)
 335                 return 0;
 336
 337         dentry_with_dos_name = NULL;
 338         list_for_each_entry(other, &dentry->link_group_list,
 339                             link_group_list)
 340         {
 341                 if (dentry->parent == other->parent && other->short_name_len) {
 342                         if (dentry_with_dos_name) {
 343                                 ERROR("Found multiple DOS names for file `%s' "
 344                                       "in the same directory",
 345                                       dentry_with_dos_name->full_path_utf8);
 346                                 return WIMLIB_ERR_INVALID_DENTRY;
 347                         }
 348                         dentry_with_dos_name = other;
 349                 }
 350         }
 351         /* If there's a dentry with a DOS name, extract it first */
 352         if (dentry_with_dos_name && !dentry_with_dos_name->extracted_file) {
 353                 char *p;
 354                 const char *dir_name;
 355                 char orig;
 356                 ntfs_volume *vol = (*dir_ni_p)->vol;
 357
 358                 DEBUG("pre-applying DOS name `%s'",
 359                       dentry_with_dos_name->full_path_utf8);
 360                 ret = do_wim_apply_dentry_ntfs(dentry_with_dos_name,
 361                                                *dir_ni_p, w);
 362                 if (ret != 0)
 363                         return ret;
 364                 p = dentry->full_path_utf8 + dentry->full_path_utf8_len;
 365                 do {
 366                         p--;
 367                 } while (*p != '/');
 368
 369                 orig = *p;
 370                 *p = '\0';
 371                 dir_name = dentry->full_path_utf8;
 372
 373                 *dir_ni_p = ntfs_pathname_to_inode(vol, NULL, dir_name);
 374                 *p = orig;
 375                 if (!*dir_ni_p) {
 376                         ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 377                                          dir_name);
 378                         return WIMLIB_ERR_NTFS_3G;
 379                 }
 380         }
 381         return 0;
 382 }
 383
 384 /*
 385  * Applies a WIM dentry to a NTFS filesystem.
 386  *
 387  * @dentry:  The WIM dentry to apply
 388  * @dir_ni:  The NTFS inode for the parent directory
 389  * @w:       The WIMStruct for the WIM containing the image we are applying.
 390  *
 391  * @return:  0 on success; nonzero on failure.
 392  */
 393 static int do_wim_apply_dentry_ntfs(struct dentry *dentry, ntfs_inode *dir_ni,
 394                                     WIMStruct *w)
 395 {
 396         int ret = 0;
 397         mode_t type;
 398         ntfs_inode *ni = NULL;
 399         bool is_hardlink = false;
 400         ntfs_volume *vol = dir_ni->vol;
 401
 402         if (dentry->attributes & FILE_ATTRIBUTE_DIRECTORY) {
 403                 type = S_IFDIR;
 404         } else {
 405                 struct dentry *other;
 406
 407                 /* Apply hard-linked directory in same directory with DOS name
 408                  * (if there is one) before this dentry */
 409                 ret = preapply_dentry_with_dos_name(dentry, &dir_ni, w);
 410                 if (ret != 0)
 411                         return ret;
 412
 413                 type = S_IFREG;
 414                 /* See if we can make a hard link */
 415                 list_for_each_entry(other, &dentry->link_group_list,
 416                                     link_group_list) {
 417                         if (other->extracted_file) {
 418                                 /* Already extracted another dentry in the hard
 419                                  * link group.  We can make a hard link instead
 420                                  * of extracting the file data. */
 421                                 ret = wim_apply_hardlink_ntfs(dentry, other,
 422                                                               dir_ni, &ni);
 423                                 is_hardlink = true;
 424                                 if (ret != 0)
 425                                         goto out_close_dir_ni;
 426                                 else
 427                                         goto out_set_dos_name;
 428                         }
 429                 }
 430                 /* Can't make a hard link; extract the file itself */
 431                 FREE(dentry->extracted_file);
 432                 dentry->extracted_file = STRDUP(dentry->full_path_utf8);
 433                 if (!dentry->extracted_file) {
 434                         ERROR("Failed to allocate memory for filename");
 435                         return WIMLIB_ERR_NOMEM;
 436                 }
 437         }
 438
 439         /*
 440          * Create a directory or file.
 441          *
 442          * Note: For symbolic links that are not directory junctions, pass
 443          * S_IFREG here, since we manually set the reparse data later.
 444          */
 445         ni = ntfs_create(dir_ni, 0, (ntfschar*)dentry->file_name,
 446                          dentry->file_name_len / 2, type);
 447
 448         if (!ni) {
 449                 ERROR_WITH_ERRNO("Could not create NTFS object for `%s'",
 450                                  dentry->full_path_utf8);
 451                 ret = WIMLIB_ERR_NTFS_3G;
 452                 goto out_close_dir_ni;
 453         }
 454
 455         /* Write the data streams, unless this is a directory or reparse point
 456          * */
 457         if (!dentry_is_directory(dentry) &&
 458              !(dentry->attributes & FILE_ATTRIBUTE_REPARSE_POINT)) {
 459                 ret = write_ntfs_data_streams(ni, dentry, w);
 460                 if (ret != 0)
 461                         goto out_close_dir_ni;
 462         }
 463
 464
 465         ret = apply_file_attributes_and_security_data(ni, dentry, w);
 466         if (ret != 0)
 467                 goto out_close_dir_ni;
 468
 469         if (dentry->attributes & FILE_ATTR_REPARSE_POINT) {
 470                 ret = apply_reparse_data(ni, dentry, w);
 471                 if (ret != 0)
 472                         goto out_close_dir_ni;
 473         }
 474
 475 out_set_dos_name:
 476         /* Set DOS (short) name if given */
 477         if (dentry->short_name_len != 0) {
 478
 479                 char *short_name_utf8;
 480                 size_t short_name_utf8_len;
 481                 short_name_utf8 = utf16_to_utf8(dentry->short_name,
 482                                                 dentry->short_name_len,
 483                                                 &short_name_utf8_len);
 484                 if (!short_name_utf8) {
 485                         ERROR("Out of memory");
 486                         ret = WIMLIB_ERR_NOMEM;
 487                         goto out_close_dir_ni;
 488                 }
 489
 490                 if (is_hardlink) {
 491                         char *p;
 492                         char orig;
 493                         const char *dir_name;
 494
 495                         /* ntfs_set_ntfs_dos_name() closes the inodes in the
 496                          * wrong order if we have applied a hard link.   Close
 497                          * them ourselves, then re-open then. */
 498                         if (ntfs_inode_close(dir_ni) != 0) {
 499                                 if (ret == 0)
 500                                         ret = WIMLIB_ERR_NTFS_3G;
 501                                 ERROR_WITH_ERRNO("Failed to close directory inode");
 502                         }
 503                         if (ntfs_inode_close(ni) != 0) {
 504                                 if (ret == 0)
 505                                         ret = WIMLIB_ERR_NTFS_3G;
 506                                 ERROR_WITH_ERRNO("Failed to close hard link target inode");
 507                         }
 508                         p = dentry->full_path_utf8 + dentry->full_path_utf8_len;
 509                         do {
 510                                 p--;
 511                         } while (*p != '/');
 512
 513                         orig = *p;
 514                         *p = '\0';
 515                         dir_name = dentry->full_path_utf8;
 516
 517                         dir_ni = ntfs_pathname_to_inode(vol, NULL, dir_name);
 518                         *p = orig;
 519                         if (!dir_ni) {
 520                                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 521                                                  dir_name);
 522                                 return WIMLIB_ERR_NTFS_3G;
 523                         }
 524                         ni = ntfs_pathname_to_inode(vol, dir_ni,
 525                                                     dentry->file_name_utf8);
 526                         if (!ni) {
 527                                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 528                                                  dir_name);
 529                                 return WIMLIB_ERR_NTFS_3G;
 530                         }
 531                 }
 532
 533                 DEBUG("Setting short (DOS) name of `%s' to %s",
 534                       dentry->full_path_utf8, short_name_utf8);
 535
 536                 ret = ntfs_set_ntfs_dos_name(ni, dir_ni, short_name_utf8,
 537                                              short_name_utf8_len, 0);
 538                 FREE(short_name_utf8);
 539                 if (ret != 0) {
 540                         ERROR_WITH_ERRNO("Could not set DOS (short) name for `%s'",
 541                                          dentry->full_path_utf8);
 542                         ret = WIMLIB_ERR_NTFS_3G;
 543                 }
 544                 /* inodes have been closed by ntfs_set_ntfs_dos_name(). */
 545                 return ret;
 546         }
 547
 548 out_close_dir_ni:
 549         if (ntfs_inode_close(dir_ni) != 0) {
 550                 if (ret == 0)
 551                         ret = WIMLIB_ERR_NTFS_3G;
 552                 ERROR_WITH_ERRNO("Failed to close directory inode");
 553         }
 554         if (ni && ntfs_inode_close(ni) != 0) {
 555                 if (ret == 0)
 556                         ret = WIMLIB_ERR_NTFS_3G;
 557                 ERROR_WITH_ERRNO("Failed to close inode");
 558         }
 559         return ret;
 560 }
 561
 562 static int wim_apply_root_dentry_ntfs(const struct dentry *dentry,
 563                                       ntfs_volume *vol,
 564                                       const WIMStruct *w)
 565 {
 566         ntfs_inode *ni;
 567         int ret = 0;
 568
 569         wimlib_assert(dentry_is_directory(dentry));
 570         ni = ntfs_pathname_to_inode(vol, NULL, "/");
 571         if (!ni) {
 572                 ERROR_WITH_ERRNO("Could not find root NTFS inode");
 573                 return WIMLIB_ERR_NTFS_3G;
 574         }
 575         ret = apply_file_attributes_and_security_data(ni, dentry, w);
 576         if (ntfs_inode_close(ni) != 0) {
 577                 ERROR_WITH_ERRNO("Failed to close NTFS inode for root "
 578                                  "directory");
 579                 ret = WIMLIB_ERR_NTFS_3G;
 580         }
 581         return ret;
 582 }
 583
 584 /* Applies a WIM dentry to the NTFS volume */
 585 static int wim_apply_dentry_ntfs(struct dentry *dentry, void *arg)
 586 {
 587         struct ntfs_apply_args *args = arg;
 588         ntfs_volume *vol             = args->vol;
 589         int extract_flags            = args->extract_flags;
 590         WIMStruct *w                 = args->w;
 591         ntfs_inode *dir_ni;
 592         char *p;
 593         char orig;
 594         const char *dir_name;
 595
 596         if (dentry->extracted_file)
 597                 return 0;
 598
 599         wimlib_assert(dentry->full_path_utf8);
 600
 601         DEBUG("Applying dentry `%s' to NTFS", dentry->full_path_utf8);
 602
 603         if (extract_flags & WIMLIB_EXTRACT_FLAG_VERBOSE)
 604                 puts(dentry->full_path_utf8);
 605
 606         if (dentry_is_root(dentry))
 607                 return wim_apply_root_dentry_ntfs(dentry, vol, w);
 608
 609         p = dentry->full_path_utf8 + dentry->full_path_utf8_len;
 610         do {
 611                 p--;
 612         } while (*p != '/');
 613
 614         orig = *p;
 615         *p = '\0';
 616         dir_name = dentry->full_path_utf8;
 617
 618         dir_ni = ntfs_pathname_to_inode(vol, NULL, dir_name);
 619         if (dir_ni)
 620                 DEBUG("Found NTFS inode for `%s'", dir_name);
 621         *p = orig;
 622         if (!dir_ni) {
 623                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 624                                  dir_name);
 625                 return WIMLIB_ERR_NTFS_3G;
 626         }
 627         return do_wim_apply_dentry_ntfs(dentry, dir_ni, w);
 628 }
 629
 630 static int wim_apply_dentry_timestamps(struct dentry *dentry, void *arg)
 631 {
 632         struct ntfs_apply_args *args = arg;
 633         ntfs_volume *vol             = args->vol;
 634         u8 *p;
 635         u8 buf[24];
 636         ntfs_inode *ni;
 637         int ret = 0;
 638
 639
 640         DEBUG("Setting timestamps on `%s'", dentry->full_path_utf8);
 641
 642         ni = ntfs_pathname_to_inode(vol, NULL, dentry->full_path_utf8);
 643         if (!ni) {
 644                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 645                                  dentry->full_path_utf8);
 646                 return WIMLIB_ERR_NTFS_3G;
 647         }
 648
 649         p = buf;
 650         p = put_u64(p, dentry->creation_time);
 651         p = put_u64(p, dentry->last_write_time);
 652         p = put_u64(p, dentry->last_access_time);
 653         ret = ntfs_inode_set_times(ni, (const char*)buf, 3 * sizeof(u64), 0);
 654         if (ret != 0) {
 655                 ERROR_WITH_ERRNO("Failed to set NTFS timestamps on `%s'",
 656                                  dentry->full_path_utf8);
 657                 ret = WIMLIB_ERR_NTFS_3G;
 658         }
 659
 660         if (ntfs_inode_close(ni) != 0) {
 661                 if (ret == 0)
 662                         ret = WIMLIB_ERR_NTFS_3G;
 663                 ERROR_WITH_ERRNO("Failed to close NTFS inode for `%s'",
 664                                  dentry->full_path_utf8);
 665         }
 666         return ret;
 667 }
 668
 669 static int do_wim_apply_image_ntfs(WIMStruct *w, const char *device, int extract_flags)
 670 {
 671         ntfs_volume *vol;
 672         int ret;
 673
 674         DEBUG("Mounting NTFS volume `%s'", device);
 675         vol = ntfs_mount(device, 0);
 676         if (!vol) {
 677                 ERROR_WITH_ERRNO("Failed to mount NTFS volume `%s'", device);
 678                 return WIMLIB_ERR_NTFS_3G;
 679         }
 680         struct ntfs_apply_args args = {
 681                 .vol           = vol,
 682                 .extract_flags = extract_flags,
 683                 .w             = w,
 684         };
 685         ret = for_dentry_in_tree(wim_root_dentry(w), wim_apply_dentry_ntfs,
 686                                  &args);
 687
 688         if (ret != 0)
 689                 goto out;
 690         if (extract_flags & WIMLIB_EXTRACT_FLAG_VERBOSE)
 691                 printf("Setting timestamps of extracted files on NTFS "
 692                        "volume `%s'\n", device);
 693         ret = for_dentry_in_tree_depth(wim_root_dentry(w),
 694                                        wim_apply_dentry_timestamps,
 695                                        &args);
 696         if (ret == 0 && (extract_flags & WIMLIB_EXTRACT_FLAG_VERBOSE))
 697                 printf("Finished applying image %d of %s to NTFS "
 698                        "volume `%s'\n",
 699                        w->current_image,
 700                        w->filename ? w->filename : "WIM",
 701                        device);
 702 out:
 703         DEBUG("Unmounting NTFS volume `%s'", device);
 704         if (ntfs_umount(vol, FALSE) != 0) {
 705                 ERROR_WITH_ERRNO("Failed to unmount NTFS volume `%s'", device);
 706                 if (ret == 0)
 707                         ret = WIMLIB_ERR_NTFS_3G;
 708         }
 709         return ret;
 710 }
 711
 712
 713 /*
 714  * API entry point for applying a WIM image to a NTFS volume.
 715  *
 716  * Please note that this is a NTFS *volume* and not a directory.  The intention
 717  * is that the volume contain an empty filesystem, and the WIM image contain a
 718  * full filesystem to be applied to the volume.
 719  */
 720 WIMLIBAPI int wimlib_apply_image_to_ntfs_volume(WIMStruct *w, int image,
 721                                                 const char *device, int flags)
 722 {
 723         int ret;
 724
 725         if (!device)
 726                 return WIMLIB_ERR_INVALID_PARAM;
 727         if (image == WIM_ALL_IMAGES) {
 728                 ERROR("Can only apply a single image when applying "
 729                       "directly to a NTFS volume");
 730                 return WIMLIB_ERR_INVALID_PARAM;
 731         }
 732         if (flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK)) {
 733                 ERROR("Cannot specify symlink or hardlink flags when applying ");
 734                 ERROR("directly to a NTFS volume");
 735                 return WIMLIB_ERR_INVALID_PARAM;
 736         }
 737         ret = wimlib_select_image(w, image);
 738         if (ret != 0)
 739                 return ret;
 740
 741         return do_wim_apply_image_ntfs(w, device, flags);
 742 }
 743
 744 #else /* WITH_NTFS_3G */
 745 WIMLIBAPI int wimlib_apply_image_to_ntfs_volume(WIMStruct *w, int image,
 746                                                 const char *device, int flags)
 747 {
 748         ERROR("wimlib was compiled without support for NTFS-3g, so");
 749         ERROR("we cannot apply a WIM image directly to a NTFS volume");
 750         return WIMLIB_ERR_UNSUPPORTED;
 751 }
 752 #endif /* WITH_NTFS_3G */