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   1 /*
   2  * ntfs-apply.c
   3  *
   4  * Apply a WIM image to a NTFS volume, restoring everything we can, including
   5  * security data and alternate data streams.  There should be no loss of
   6  * information.
   7  */
   8
   9 /*
  10  * Copyright (C) 2012 Eric Biggers
  11  *
  12  * This file is part of wimlib, a library for working with WIM files.
  13  *
  14  * wimlib is free software; you can redistribute it and/or modify it under the
  15  * terms of the GNU Lesser General Public License as published by the Free
  16  * Software Foundation; either version 2.1 of the License, or (at your option)
  17  * any later version.
  18  *
  19  * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
  20  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  21  * A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
  22  * details.
  23  *
  24  * You should have received a copy of the GNU Lesser General Public License
  25  * along with wimlib; if not, see http://www.gnu.org/licenses/.
  26  */
  27
  28 #include "config.h"
  29 #include "wimlib_internal.h"
  30
  31
  32 #ifdef WITH_NTFS_3G
  33 #include "dentry.h"
  34 #include "lookup_table.h"
  35 #include "io.h"
  36 #include <ntfs-3g/layout.h>
  37 #include <ntfs-3g/acls.h>
  38 #include <ntfs-3g/attrib.h>
  39 #include <ntfs-3g/misc.h>
  40 #include <ntfs-3g/reparse.h>
  41 #include <ntfs-3g/security.h>
  42 #include <ntfs-3g/volume.h>
  43 #include <stdlib.h>
  44 #include <unistd.h>
  45
  46 struct ntfs_apply_args {
  47         ntfs_volume *vol;
  48         int extract_flags;
  49         WIMStruct *w;
  50 };
  51
  52 extern int _ntfs_set_file_security(ntfs_inode *ni, u32 selection,
  53                                    const char *attr);
  54 extern int _ntfs_set_file_attributes(ntfs_inode *ni, s32 attrib);
  55
  56 /*
  57  * Extracts a WIM resource to a NTFS attribute.
  58  */
  59 static int
  60 extract_wim_resource_to_ntfs_attr(const struct lookup_table_entry *lte,
  61                                   ntfs_attr *na)
  62 {
  63         u64 bytes_remaining = wim_resource_size(lte);
  64         char buf[min(WIM_CHUNK_SIZE, bytes_remaining)];
  65         u64 offset = 0;
  66         int ret = 0;
  67         u8 hash[SHA1_HASH_SIZE];
  68
  69         SHA_CTX ctx;
  70         sha1_init(&ctx);
  71
  72         while (bytes_remaining) {
  73                 u64 to_read = min(bytes_remaining, WIM_CHUNK_SIZE);
  74                 ret = read_wim_resource(lte, buf, to_read, offset, false);
  75                 if (ret != 0)
  76                         break;
  77                 sha1_update(&ctx, buf, to_read);
  78                 if (ntfs_attr_pwrite(na, offset, to_read, buf) != to_read) {
  79                         ERROR_WITH_ERRNO("Error extracting WIM resource");
  80                         return WIMLIB_ERR_WRITE;
  81                 }
  82                 bytes_remaining -= to_read;
  83                 offset += to_read;
  84         }
  85         sha1_final(hash, &ctx);
  86         if (!hashes_equal(hash, lte->hash)) {
  87                 ERROR("Invalid checksum on a WIM resource "
  88                       "(detected when extracting to NTFS stream file)");
  89                 ERROR("The following WIM resource is invalid:");
  90                 print_lookup_table_entry(lte);
  91                 return WIMLIB_ERR_INVALID_RESOURCE_HASH;
  92         }
  93         return 0;
  94 }
  95
  96 /* Writes the data streams to a NTFS file
  97  *
  98  * @ni:      The NTFS inode for the file.
  99  * @dentry:  The directory entry in the WIM file.
 100  * @w:       The WIMStruct for the WIM containing the image we are applying.
 101  *
 102  * Returns 0 on success, nonzero on failure.
 103  */
 104 static int write_ntfs_data_streams(ntfs_inode *ni, const struct dentry *dentry,
 105                                    WIMStruct *w)
 106 {
 107         int ret = 0;
 108         unsigned stream_idx = 0;
 109         ntfschar *stream_name = AT_UNNAMED;
 110         u32 stream_name_len = 0;
 111
 112         DEBUG("Writing %u NTFS data stream%s for `%s'",
 113               dentry->num_ads + 1,
 114               (dentry->num_ads == 0 ? "" : "s"),
 115               dentry->full_path_utf8);
 116
 117         while (1) {
 118                 struct lookup_table_entry *lte;
 119                 ntfs_attr *na;
 120
 121                 lte = dentry_stream_lte(dentry, stream_idx, w->lookup_table);
 122                 na = ntfs_attr_open(ni, AT_DATA, stream_name, stream_name_len);
 123                 if (!na) {
 124                         ERROR_WITH_ERRNO("Failed to open a data stream of "
 125                                          "extracted file `%s'",
 126                                          dentry->full_path_utf8);
 127                         ret = WIMLIB_ERR_NTFS_3G;
 128                         break;
 129                 }
 130                 if (lte)
 131                         ret = extract_wim_resource_to_ntfs_attr(lte, na);
 132                 ntfs_attr_close(na);
 133                 if (ret != 0)
 134                         break;
 135                 if (stream_idx == dentry->num_ads)
 136                         break;
 137                 stream_name = (ntfschar*)dentry->ads_entries[stream_idx].stream_name;
 138                 stream_name_len = dentry->ads_entries[stream_idx].stream_name_len / 2;
 139                 stream_idx++;
 140         }
 141         return ret;
 142 }
 143
 144 /*
 145  * Makes a NTFS hard link
 146  *
 147  * It is named @from_dentry->file_name and is located under the directory
 148  * specified by @dir_ni, and it is made to point to the previously extracted
 149  * file located at @to_dentry->extracted_file.
 150  *
 151  * Return 0 on success, nonzero on failure.
 152  */
 153 static int wim_apply_hardlink_ntfs(const struct dentry *from_dentry,
 154                                    const struct dentry *to_dentry,
 155                                    ntfs_inode *dir_ni,
 156                                    ntfs_inode **to_ni_ret)
 157 {
 158         int ret;
 159         ntfs_inode *to_ni;
 160
 161         wimlib_assert(dentry_is_regular_file(from_dentry)
 162                         && dentry_is_regular_file(to_dentry));
 163
 164         DEBUG("Extracting NTFS hard link `%s' => `%s'",
 165               from_dentry->full_path_utf8, to_dentry->extracted_file);
 166
 167         to_ni = ntfs_pathname_to_inode(dir_ni->vol, NULL,
 168                                        to_dentry->extracted_file);
 169         if (!to_ni) {
 170                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 171                                  to_dentry->extracted_file);
 172                 return WIMLIB_ERR_NTFS_3G;
 173         }
 174         ret = ntfs_link(to_ni, dir_ni,
 175                         (ntfschar*)from_dentry->file_name,
 176                         from_dentry->file_name_len / 2);
 177         if (ret != 0) {
 178                 ERROR_WITH_ERRNO("Could not create hard link `%s' => `%s'",
 179                                  from_dentry->full_path_utf8,
 180                                  to_dentry->extracted_file);
 181                 ret = WIMLIB_ERR_NTFS_3G;
 182         }
 183         *to_ni_ret = to_ni;
 184         return ret;
 185 }
 186
 187 static int
 188 apply_file_attributes_and_security_data(ntfs_inode *ni,
 189                                         const struct dentry *dentry,
 190                                         const WIMStruct *w)
 191 {
 192         DEBUG("Setting NTFS file attributes on `%s' to %#"PRIx32,
 193               dentry->full_path_utf8, dentry->attributes);
 194         if (!_ntfs_set_file_attributes(ni, dentry->attributes)) {
 195                 ERROR("Failed to set NTFS file attributes on `%s'",
 196                        dentry->full_path_utf8);
 197                 return WIMLIB_ERR_NTFS_3G;
 198         }
 199
 200         if (dentry->security_id != -1) {
 201                 const struct wim_security_data *sd;
 202
 203                 sd = wim_const_security_data(w);
 204                 wimlib_assert(dentry->security_id < sd->num_entries);
 205                 DEBUG("Applying security descriptor %d to `%s'",
 206                       dentry->security_id, dentry->full_path_utf8);
 207                 u32 selection = OWNER_SECURITY_INFORMATION |
 208                                 GROUP_SECURITY_INFORMATION |
 209                                 DACL_SECURITY_INFORMATION  |
 210                                 SACL_SECURITY_INFORMATION;
 211
 212                 if (!_ntfs_set_file_security(ni, selection,
 213                                              sd->descriptors[dentry->security_id]))
 214                 {
 215                         ERROR_WITH_ERRNO("Failed to set security data on `%s'",
 216                                         dentry->full_path_utf8);
 217                         return WIMLIB_ERR_NTFS_3G;
 218                 }
 219         }
 220         return 0;
 221 }
 222
 223 static int apply_reparse_data(ntfs_inode *ni, const struct dentry *dentry,
 224                               const WIMStruct *w)
 225 {
 226         struct lookup_table_entry *lte;
 227         int ret = 0;
 228
 229         wimlib_assert(dentry->attributes & FILE_ATTRIBUTE_REPARSE_POINT);
 230
 231         lte = dentry_first_lte(dentry, w->lookup_table);
 232
 233         DEBUG("Applying reparse data to `%s'", dentry->full_path_utf8);
 234
 235         if (!lte) {
 236                 ERROR("Could not find reparse data for `%s'",
 237                       dentry->full_path_utf8);
 238                 return WIMLIB_ERR_INVALID_DENTRY;
 239         }
 240
 241         if (wim_resource_size(lte) >= 0xffff) {
 242                 ERROR("Reparse data of `%s' is too long (%lu bytes)",
 243                       dentry->full_path_utf8, wim_resource_size(lte));
 244                 return WIMLIB_ERR_INVALID_DENTRY;
 245         }
 246
 247         char reparse_data_buf[8 + wim_resource_size(lte)];
 248         char *p = reparse_data_buf;
 249         p = put_u32(p, dentry->reparse_tag); /* ReparseTag */
 250         p = put_u16(p, wim_resource_size(lte)); /* ReparseDataLength */
 251         p = put_u16(p, 0); /* Reserved */
 252
 253         ret = read_full_wim_resource(lte, p);
 254         if (ret != 0)
 255                 return ret;
 256
 257         ret = ntfs_set_ntfs_reparse_data(ni, reparse_data_buf,
 258                                          wim_resource_size(lte) + 8, 0);
 259         if (ret != 0) {
 260                 ERROR_WITH_ERRNO("Failed to set NTFS reparse data on `%s'",
 261                                  dentry->full_path_utf8);
 262                 return WIMLIB_ERR_NTFS_3G;
 263         }
 264         return 0;
 265 }
 266
 267 static int do_wim_apply_dentry_ntfs(struct dentry *dentry, ntfs_inode *dir_ni,
 268                                     WIMStruct *w);
 269
 270 /*
 271  * If @dentry is part of a hard link group, search for hard-linked dentries in
 272  * the same directory that have a nonempty DOS (short) filename.  There should
 273  * be exactly 0 or 1 such dentries.  If there is 1, extract that dentry first,
 274  * so that the DOS name is correctly associated with the corresponding long name
 275  * in the Win32 namespace, and not any of the additional names in the POSIX
 276  * namespace created from hard links.
 277  */
 278 static int preapply_dentry_with_dos_name(struct dentry *dentry,
 279                                          ntfs_inode **dir_ni_p,
 280                                          WIMStruct *w)
 281 {
 282         int ret;
 283         struct dentry *other;
 284         struct dentry *dentry_with_dos_name;
 285
 286         if (dentry->link_group_list.next == &dentry->link_group_list)
 287                 return 0;
 288
 289         dentry_with_dos_name = NULL;
 290         list_for_each_entry(other, &dentry->link_group_list,
 291                             link_group_list)
 292         {
 293                 if (dentry->parent == other->parent && other->short_name_len) {
 294                         if (dentry_with_dos_name) {
 295                                 ERROR("Found multiple DOS names for file `%s' "
 296                                       "in the same directory",
 297                                       dentry_with_dos_name->full_path_utf8);
 298                                 return WIMLIB_ERR_INVALID_DENTRY;
 299                         }
 300                         dentry_with_dos_name = other;
 301                 }
 302         }
 303         /* If there's a dentry with a DOS name, extract it first */
 304         if (dentry_with_dos_name && !dentry_with_dos_name->extracted_file) {
 305                 char *p;
 306                 const char *dir_name;
 307                 char orig;
 308                 ntfs_volume *vol = (*dir_ni_p)->vol;
 309
 310                 DEBUG("pre-applying DOS name `%s'",
 311                       dentry_with_dos_name->full_path_utf8);
 312                 ret = do_wim_apply_dentry_ntfs(dentry_with_dos_name,
 313                                                *dir_ni_p, w);
 314                 if (ret != 0)
 315                         return ret;
 316                 p = dentry->full_path_utf8 + dentry->full_path_utf8_len;
 317                 do {
 318                         p--;
 319                 } while (*p != '/');
 320
 321                 orig = *p;
 322                 *p = '\0';
 323                 dir_name = dentry->full_path_utf8;
 324
 325                 *dir_ni_p = ntfs_pathname_to_inode(vol, NULL, dir_name);
 326                 *p = orig;
 327                 if (!*dir_ni_p) {
 328                         ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 329                                          dir_name);
 330                         return WIMLIB_ERR_NTFS_3G;
 331                 }
 332         }
 333         return 0;
 334 }
 335
 336 /*
 337  * Applies a WIM dentry to a NTFS filesystem.
 338  *
 339  * @dentry:  The WIM dentry to apply
 340  * @dir_ni:  The NTFS inode for the parent directory
 341  * @w:       The WIMStruct for the WIM containing the image we are applying.
 342  *
 343  * @return:  0 on success; nonzero on failure.
 344  */
 345 static int do_wim_apply_dentry_ntfs(struct dentry *dentry, ntfs_inode *dir_ni,
 346                                     WIMStruct *w)
 347 {
 348         int ret = 0;
 349         mode_t type;
 350         ntfs_inode *ni = NULL;
 351         bool is_hardlink = false;
 352         ntfs_volume *vol = dir_ni->vol;
 353
 354         if (dentry->attributes & FILE_ATTRIBUTE_DIRECTORY) {
 355                 type = S_IFDIR;
 356         } else {
 357                 struct dentry *other;
 358
 359                 ret = preapply_dentry_with_dos_name(dentry, &dir_ni, w);
 360                 if (ret != 0)
 361                         return ret;
 362
 363                 type = S_IFREG;
 364                 /* See if we can make a hard link */
 365                 list_for_each_entry(other, &dentry->link_group_list,
 366                                     link_group_list) {
 367                         if (other->extracted_file) {
 368                                 ret = wim_apply_hardlink_ntfs(dentry, other,
 369                                                               dir_ni, &ni);
 370                                 is_hardlink = true;
 371                                 if (ret != 0)
 372                                         goto out_close_dir_ni;
 373                                 else
 374                                         goto out_set_dos_name;
 375                         }
 376                 }
 377                 /* Can't make a hard link */
 378                 FREE(dentry->extracted_file);
 379                 dentry->extracted_file = STRDUP(dentry->full_path_utf8);
 380                 if (!dentry->extracted_file) {
 381                         ERROR("Failed to allocate memory for filename");
 382                         return WIMLIB_ERR_NOMEM;
 383                 }
 384         }
 385
 386         /*
 387          * Create a directory or file.
 388          *
 389          * Note: For symbolic links that are not directory junctions, pass
 390          * S_IFREG here, since we manually set the reparse data later.
 391          */
 392         ni = ntfs_create(dir_ni, 0, (ntfschar*)dentry->file_name,
 393                          dentry->file_name_len / 2, type);
 394
 395         if (!ni) {
 396                 ERROR_WITH_ERRNO("Could not create NTFS object for `%s'",
 397                                  dentry->full_path_utf8);
 398                 ret = WIMLIB_ERR_NTFS_3G;
 399                 goto out_close_dir_ni;
 400         }
 401
 402         /* Write the data streams, unless this is a directory or reparse point
 403          * */
 404         if (!dentry_is_directory(dentry) &&
 405              !(dentry->attributes & FILE_ATTRIBUTE_REPARSE_POINT)) {
 406                 ret = write_ntfs_data_streams(ni, dentry, w);
 407                 if (ret != 0)
 408                         goto out_close_dir_ni;
 409         }
 410
 411
 412         ret = apply_file_attributes_and_security_data(ni, dentry, w);
 413         if (ret != 0)
 414                 goto out_close_dir_ni;
 415
 416         if (dentry->attributes & FILE_ATTR_REPARSE_POINT) {
 417                 ret = apply_reparse_data(ni, dentry, w);
 418                 if (ret != 0)
 419                         goto out_close_dir_ni;
 420         }
 421
 422 out_set_dos_name:
 423         /* Set DOS (short) name if given */
 424         if (dentry->short_name_len != 0) {
 425
 426                 char *short_name_utf8;
 427                 size_t short_name_utf8_len;
 428                 short_name_utf8 = utf16_to_utf8(dentry->short_name,
 429                                                 dentry->short_name_len,
 430                                                 &short_name_utf8_len);
 431                 if (!short_name_utf8) {
 432                         ERROR("Out of memory");
 433                         ret = WIMLIB_ERR_NOMEM;
 434                         goto out_close_dir_ni;
 435                 }
 436
 437                 if (is_hardlink) {
 438                         char *p;
 439                         char orig;
 440                         const char *dir_name;
 441
 442                         /* ntfs_set_ntfs_dos_name() closes the inodes in the
 443                          * wrong order if we have applied a hard link.   Close
 444                          * them ourselves, then re-open then. */
 445                         if (ntfs_inode_close(dir_ni) != 0) {
 446                                 if (ret == 0)
 447                                         ret = WIMLIB_ERR_NTFS_3G;
 448                                 ERROR_WITH_ERRNO("Failed to close directory inode");
 449                         }
 450                         if (ntfs_inode_close(ni) != 0) {
 451                                 if (ret == 0)
 452                                         ret = WIMLIB_ERR_NTFS_3G;
 453                                 ERROR_WITH_ERRNO("Failed to close hard link target inode");
 454                         }
 455                         p = dentry->full_path_utf8 + dentry->full_path_utf8_len;
 456                         do {
 457                                 p--;
 458                         } while (*p != '/');
 459
 460                         orig = *p;
 461                         *p = '\0';
 462                         dir_name = dentry->full_path_utf8;
 463
 464                         dir_ni = ntfs_pathname_to_inode(vol, NULL, dir_name);
 465                         *p = orig;
 466                         if (!dir_ni) {
 467                                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 468                                                  dir_name);
 469                                 return WIMLIB_ERR_NTFS_3G;
 470                         }
 471                         ni = ntfs_pathname_to_inode(vol, dir_ni,
 472                                                     dentry->file_name_utf8);
 473                         if (!ni) {
 474                                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 475                                                  dir_name);
 476                                 return WIMLIB_ERR_NTFS_3G;
 477                         }
 478                 }
 479
 480                 DEBUG("Setting short (DOS) name of `%s' to %s",
 481                       dentry->full_path_utf8, short_name_utf8);
 482
 483                 ret = ntfs_set_ntfs_dos_name(ni, dir_ni, short_name_utf8,
 484                                              short_name_utf8_len, 0);
 485                 FREE(short_name_utf8);
 486                 if (ret != 0) {
 487                         ERROR_WITH_ERRNO("Could not set DOS (short) name for `%s'",
 488                                          dentry->full_path_utf8);
 489                         ret = WIMLIB_ERR_NTFS_3G;
 490                 }
 491                 /* inodes have been closed by ntfs_set_ntfs_dos_name(). */
 492                 return ret;
 493         }
 494
 495 out_close_dir_ni:
 496         if (ntfs_inode_close(dir_ni) != 0) {
 497                 if (ret == 0)
 498                         ret = WIMLIB_ERR_NTFS_3G;
 499                 ERROR_WITH_ERRNO("Failed to close directory inode");
 500         }
 501 out_close_ni:
 502         if (ni && ntfs_inode_close(ni) != 0) {
 503                 if (ret == 0)
 504                         ret = WIMLIB_ERR_NTFS_3G;
 505                 ERROR_WITH_ERRNO("Failed to close inode");
 506         }
 507         return ret;
 508 }
 509
 510 static int wim_apply_root_dentry_ntfs(const struct dentry *dentry,
 511                                       ntfs_volume *vol,
 512                                       const WIMStruct *w)
 513 {
 514         ntfs_inode *ni;
 515         int ret = 0;
 516
 517         wimlib_assert(dentry_is_directory(dentry));
 518         ni = ntfs_pathname_to_inode(vol, NULL, "/");
 519         if (!ni) {
 520                 ERROR_WITH_ERRNO("Could not find root NTFS inode");
 521                 return WIMLIB_ERR_NTFS_3G;
 522         }
 523         ret = apply_file_attributes_and_security_data(ni, dentry, w);
 524         if (ntfs_inode_close(ni) != 0) {
 525                 ERROR_WITH_ERRNO("Failed to close NTFS inode for root "
 526                                  "directory");
 527                 ret = WIMLIB_ERR_NTFS_3G;
 528         }
 529         return ret;
 530 }
 531
 532 /* Applies a WIM dentry to the NTFS volume */
 533 static int wim_apply_dentry_ntfs(struct dentry *dentry, void *arg)
 534 {
 535         struct ntfs_apply_args *args = arg;
 536         ntfs_volume *vol             = args->vol;
 537         int extract_flags            = args->extract_flags;
 538         WIMStruct *w                 = args->w;
 539         ntfs_inode *dir_ni;
 540         int ret;
 541         char *p;
 542         char orig;
 543         ntfs_inode *close_after_dir;
 544         const char *dir_name;
 545
 546         if (dentry->extracted_file)
 547                 return 0;
 548
 549         wimlib_assert(dentry->full_path_utf8);
 550
 551         DEBUG("Applying dentry `%s' to NTFS", dentry->full_path_utf8);
 552
 553         if (extract_flags & WIMLIB_EXTRACT_FLAG_VERBOSE)
 554                 puts(dentry->full_path_utf8);
 555
 556         if (dentry_is_root(dentry))
 557                 return wim_apply_root_dentry_ntfs(dentry, vol, w);
 558
 559         p = dentry->full_path_utf8 + dentry->full_path_utf8_len;
 560         do {
 561                 p--;
 562         } while (*p != '/');
 563
 564         orig = *p;
 565         *p = '\0';
 566         dir_name = dentry->full_path_utf8;
 567
 568         dir_ni = ntfs_pathname_to_inode(vol, NULL, dir_name);
 569         if (dir_ni)
 570                 DEBUG("Found NTFS inode for `%s'", dir_name);
 571         *p = orig;
 572         if (!dir_ni) {
 573                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 574                                  dir_name);
 575                 return WIMLIB_ERR_NTFS_3G;
 576         }
 577         return do_wim_apply_dentry_ntfs(dentry, dir_ni, w);
 578 }
 579
 580 static int wim_apply_dentry_timestamps(struct dentry *dentry, void *arg)
 581 {
 582         struct ntfs_apply_args *args = arg;
 583         ntfs_volume *vol             = args->vol;
 584         int extract_flags            = args->extract_flags;
 585         WIMStruct *w                 = args->w;
 586         char *p;
 587         char buf[24];
 588         ntfs_inode *ni;
 589         int ret = 0;
 590
 591
 592         DEBUG("Setting timestamps on `%s'", dentry->full_path_utf8);
 593
 594         ni = ntfs_pathname_to_inode(vol, NULL, dentry->full_path_utf8);
 595         if (!ni) {
 596                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 597                                  dentry->full_path_utf8);
 598                 return WIMLIB_ERR_NTFS_3G;
 599         }
 600
 601         p = buf;
 602         p = put_u64(p, dentry->creation_time);
 603         p = put_u64(p, dentry->last_write_time);
 604         p = put_u64(p, dentry->last_access_time);
 605         ret = ntfs_inode_set_times(ni, buf, 3 * sizeof(u64), 0);
 606         if (ret != 0) {
 607                 ERROR_WITH_ERRNO("Failed to set NTFS timestamps on `%s'",
 608                                  dentry->full_path_utf8);
 609                 ret = WIMLIB_ERR_NTFS_3G;
 610         }
 611
 612         if (ntfs_inode_close(ni) != 0) {
 613                 if (ret == 0)
 614                         ret = WIMLIB_ERR_NTFS_3G;
 615                 ERROR_WITH_ERRNO("Failed to close NTFS inode for `%s'",
 616                                  dentry->full_path_utf8);
 617         }
 618         return ret;
 619 }
 620
 621 static int do_wim_apply_image_ntfs(WIMStruct *w, const char *device, int extract_flags)
 622 {
 623         ntfs_volume *vol;
 624         int ret;
 625
 626         DEBUG("Mounting NTFS volume `%s'", device);
 627         vol = ntfs_mount(device, 0);
 628         if (!vol) {
 629                 ERROR_WITH_ERRNO("Failed to mount NTFS volume `%s'", device);
 630                 return WIMLIB_ERR_NTFS_3G;
 631         }
 632         struct ntfs_apply_args args = {
 633                 .vol           = vol,
 634                 .extract_flags = extract_flags,
 635                 .w             = w,
 636         };
 637         ret = for_dentry_in_tree(wim_root_dentry(w), wim_apply_dentry_ntfs,
 638                                  &args);
 639
 640         if (ret != 0)
 641                 goto out;
 642         DEBUG("Setting NTFS timestamps");
 643         ret = for_dentry_in_tree_depth(wim_root_dentry(w),
 644                                        wim_apply_dentry_timestamps,
 645                                        &args);
 646 out:
 647         DEBUG("Unmounting NTFS volume `%s'", device);
 648         if (ntfs_umount(vol, FALSE) != 0) {
 649                 ERROR_WITH_ERRNO("Failed to unmount NTFS volume `%s'", device);
 650                 if (ret == 0)
 651                         ret = WIMLIB_ERR_NTFS_3G;
 652         }
 653         return ret;
 654 }
 655
 656
 657 /*
 658  * API entry point for applying a WIM image to a NTFS volume.
 659  *
 660  * Please note that this is a NTFS *volume* and not a directory.  The intention
 661  * is that the volume contain an empty filesystem, and the WIM image contain a
 662  * full filesystem to be applied to the volume.
 663  */
 664 WIMLIBAPI int wimlib_apply_image_to_ntfs_volume(WIMStruct *w, int image,
 665                                                 const char *device, int flags)
 666 {
 667         int ret;
 668
 669         if (!device)
 670                 return WIMLIB_ERR_INVALID_PARAM;
 671         if (image == WIM_ALL_IMAGES) {
 672                 ERROR("Can only apply a single image when applying "
 673                       "directly to a NTFS volume");
 674                 return WIMLIB_ERR_INVALID_PARAM;
 675         }
 676         if (flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK)) {
 677                 ERROR("Cannot specify symlink or hardlink flags when applying ");
 678                 ERROR("directly to a NTFS volume");
 679                 return WIMLIB_ERR_INVALID_PARAM;
 680         }
 681         ret = wimlib_select_image(w, image);
 682         if (ret != 0)
 683                 return ret;
 684
 685 #if 0
 686         if (getuid() != 0) {
 687                 ERROR("We are not root, but NTFS-3g requires root privileges to set arbitrary");
 688                 ERROR("security data on the NTFS filesystem.  Please run this program as root");
 689                 ERROR("if you want to extract a WIM image while preserving NTFS-specific");
 690                 ERROR("information.");
 691
 692                 return WIMLIB_ERR_NOT_ROOT;
 693         }
 694 #endif
 695         return do_wim_apply_image_ntfs(w, device, flags);
 696 }
 697
 698 #else /* WITH_NTFS_3G */
 699 WIMLIBAPI int wimlib_apply_image_to_ntfs_volume(WIMStruct *w, int image,
 700                                                 const char *device, int flags)
 701 {
 702         ERROR("wimlib was compiled without support for NTFS-3g, so");
 703         ERROR("we cannot apply a WIM image directly to a NTFS volume");
 704         return WIMLIB_ERR_UNSUPPORTED;
 705 }
 706 #endif /* WITH_NTFS_3G */