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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_inode_set_security(ntfs_inode *ni, u32 selection,
  53                                    const char *attr);
  54 extern int ntfs_inode_set_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)");
  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_inode_set_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_inode_set_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                 /* Apply hard-linked directory in same directory with DOS name
 360                  * (if there is one) before this dentry */
 361                 ret = preapply_dentry_with_dos_name(dentry, &dir_ni, w);
 362                 if (ret != 0)
 363                         return ret;
 364
 365                 type = S_IFREG;
 366                 /* See if we can make a hard link */
 367                 list_for_each_entry(other, &dentry->link_group_list,
 368                                     link_group_list) {
 369                         if (other->extracted_file) {
 370                                 /* Already extracted another dentry in the hard
 371                                  * link group.  We can make a hard link instead
 372                                  * of extracting the file data. */
 373                                 ret = wim_apply_hardlink_ntfs(dentry, other,
 374                                                               dir_ni, &ni);
 375                                 is_hardlink = true;
 376                                 if (ret != 0)
 377                                         goto out_close_dir_ni;
 378                                 else
 379                                         goto out_set_dos_name;
 380                         }
 381                 }
 382                 /* Can't make a hard link; extract the file itself */
 383                 FREE(dentry->extracted_file);
 384                 dentry->extracted_file = STRDUP(dentry->full_path_utf8);
 385                 if (!dentry->extracted_file) {
 386                         ERROR("Failed to allocate memory for filename");
 387                         return WIMLIB_ERR_NOMEM;
 388                 }
 389         }
 390
 391         /*
 392          * Create a directory or file.
 393          *
 394          * Note: For symbolic links that are not directory junctions, pass
 395          * S_IFREG here, since we manually set the reparse data later.
 396          */
 397         ni = ntfs_create(dir_ni, 0, (ntfschar*)dentry->file_name,
 398                          dentry->file_name_len / 2, type);
 399
 400         if (!ni) {
 401                 ERROR_WITH_ERRNO("Could not create NTFS object for `%s'",
 402                                  dentry->full_path_utf8);
 403                 ret = WIMLIB_ERR_NTFS_3G;
 404                 goto out_close_dir_ni;
 405         }
 406
 407         /* Write the data streams, unless this is a directory or reparse point
 408          * */
 409         if (!dentry_is_directory(dentry) &&
 410              !(dentry->attributes & FILE_ATTRIBUTE_REPARSE_POINT)) {
 411                 ret = write_ntfs_data_streams(ni, dentry, w);
 412                 if (ret != 0)
 413                         goto out_close_dir_ni;
 414         }
 415
 416
 417         ret = apply_file_attributes_and_security_data(ni, dentry, w);
 418         if (ret != 0)
 419                 goto out_close_dir_ni;
 420
 421         if (dentry->attributes & FILE_ATTR_REPARSE_POINT) {
 422                 ret = apply_reparse_data(ni, dentry, w);
 423                 if (ret != 0)
 424                         goto out_close_dir_ni;
 425         }
 426
 427 out_set_dos_name:
 428         /* Set DOS (short) name if given */
 429         if (dentry->short_name_len != 0) {
 430
 431                 char *short_name_utf8;
 432                 size_t short_name_utf8_len;
 433                 short_name_utf8 = utf16_to_utf8(dentry->short_name,
 434                                                 dentry->short_name_len,
 435                                                 &short_name_utf8_len);
 436                 if (!short_name_utf8) {
 437                         ERROR("Out of memory");
 438                         ret = WIMLIB_ERR_NOMEM;
 439                         goto out_close_dir_ni;
 440                 }
 441
 442                 if (is_hardlink) {
 443                         char *p;
 444                         char orig;
 445                         const char *dir_name;
 446
 447                         /* ntfs_set_ntfs_dos_name() closes the inodes in the
 448                          * wrong order if we have applied a hard link.   Close
 449                          * them ourselves, then re-open then. */
 450                         if (ntfs_inode_close(dir_ni) != 0) {
 451                                 if (ret == 0)
 452                                         ret = WIMLIB_ERR_NTFS_3G;
 453                                 ERROR_WITH_ERRNO("Failed to close directory inode");
 454                         }
 455                         if (ntfs_inode_close(ni) != 0) {
 456                                 if (ret == 0)
 457                                         ret = WIMLIB_ERR_NTFS_3G;
 458                                 ERROR_WITH_ERRNO("Failed to close hard link target inode");
 459                         }
 460                         p = dentry->full_path_utf8 + dentry->full_path_utf8_len;
 461                         do {
 462                                 p--;
 463                         } while (*p != '/');
 464
 465                         orig = *p;
 466                         *p = '\0';
 467                         dir_name = dentry->full_path_utf8;
 468
 469                         dir_ni = ntfs_pathname_to_inode(vol, NULL, dir_name);
 470                         *p = orig;
 471                         if (!dir_ni) {
 472                                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 473                                                  dir_name);
 474                                 return WIMLIB_ERR_NTFS_3G;
 475                         }
 476                         ni = ntfs_pathname_to_inode(vol, dir_ni,
 477                                                     dentry->file_name_utf8);
 478                         if (!ni) {
 479                                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 480                                                  dir_name);
 481                                 return WIMLIB_ERR_NTFS_3G;
 482                         }
 483                 }
 484
 485                 DEBUG("Setting short (DOS) name of `%s' to %s",
 486                       dentry->full_path_utf8, short_name_utf8);
 487
 488                 ret = ntfs_set_ntfs_dos_name(ni, dir_ni, short_name_utf8,
 489                                              short_name_utf8_len, 0);
 490                 FREE(short_name_utf8);
 491                 if (ret != 0) {
 492                         ERROR_WITH_ERRNO("Could not set DOS (short) name for `%s'",
 493                                          dentry->full_path_utf8);
 494                         ret = WIMLIB_ERR_NTFS_3G;
 495                 }
 496                 /* inodes have been closed by ntfs_set_ntfs_dos_name(). */
 497                 return ret;
 498         }
 499
 500 out_close_dir_ni:
 501         if (ntfs_inode_close(dir_ni) != 0) {
 502                 if (ret == 0)
 503                         ret = WIMLIB_ERR_NTFS_3G;
 504                 ERROR_WITH_ERRNO("Failed to close directory inode");
 505         }
 506 out_close_ni:
 507         if (ni && ntfs_inode_close(ni) != 0) {
 508                 if (ret == 0)
 509                         ret = WIMLIB_ERR_NTFS_3G;
 510                 ERROR_WITH_ERRNO("Failed to close inode");
 511         }
 512         return ret;
 513 }
 514
 515 static int wim_apply_root_dentry_ntfs(const struct dentry *dentry,
 516                                       ntfs_volume *vol,
 517                                       const WIMStruct *w)
 518 {
 519         ntfs_inode *ni;
 520         int ret = 0;
 521
 522         wimlib_assert(dentry_is_directory(dentry));
 523         ni = ntfs_pathname_to_inode(vol, NULL, "/");
 524         if (!ni) {
 525                 ERROR_WITH_ERRNO("Could not find root NTFS inode");
 526                 return WIMLIB_ERR_NTFS_3G;
 527         }
 528         ret = apply_file_attributes_and_security_data(ni, dentry, w);
 529         if (ntfs_inode_close(ni) != 0) {
 530                 ERROR_WITH_ERRNO("Failed to close NTFS inode for root "
 531                                  "directory");
 532                 ret = WIMLIB_ERR_NTFS_3G;
 533         }
 534         return ret;
 535 }
 536
 537 /* Applies a WIM dentry to the NTFS volume */
 538 static int wim_apply_dentry_ntfs(struct dentry *dentry, void *arg)
 539 {
 540         struct ntfs_apply_args *args = arg;
 541         ntfs_volume *vol             = args->vol;
 542         int extract_flags            = args->extract_flags;
 543         WIMStruct *w                 = args->w;
 544         ntfs_inode *dir_ni;
 545         int ret;
 546         char *p;
 547         char orig;
 548         ntfs_inode *close_after_dir;
 549         const char *dir_name;
 550
 551         if (dentry->extracted_file)
 552                 return 0;
 553
 554         wimlib_assert(dentry->full_path_utf8);
 555
 556         DEBUG("Applying dentry `%s' to NTFS", dentry->full_path_utf8);
 557
 558         if (extract_flags & WIMLIB_EXTRACT_FLAG_VERBOSE)
 559                 puts(dentry->full_path_utf8);
 560
 561         if (dentry_is_root(dentry))
 562                 return wim_apply_root_dentry_ntfs(dentry, vol, w);
 563
 564         p = dentry->full_path_utf8 + dentry->full_path_utf8_len;
 565         do {
 566                 p--;
 567         } while (*p != '/');
 568
 569         orig = *p;
 570         *p = '\0';
 571         dir_name = dentry->full_path_utf8;
 572
 573         dir_ni = ntfs_pathname_to_inode(vol, NULL, dir_name);
 574         if (dir_ni)
 575                 DEBUG("Found NTFS inode for `%s'", dir_name);
 576         *p = orig;
 577         if (!dir_ni) {
 578                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 579                                  dir_name);
 580                 return WIMLIB_ERR_NTFS_3G;
 581         }
 582         return do_wim_apply_dentry_ntfs(dentry, dir_ni, w);
 583 }
 584
 585 static int wim_apply_dentry_timestamps(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         char *p;
 592         char buf[24];
 593         ntfs_inode *ni;
 594         int ret = 0;
 595
 596
 597         DEBUG("Setting timestamps on `%s'", dentry->full_path_utf8);
 598
 599         ni = ntfs_pathname_to_inode(vol, NULL, dentry->full_path_utf8);
 600         if (!ni) {
 601                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 602                                  dentry->full_path_utf8);
 603                 return WIMLIB_ERR_NTFS_3G;
 604         }
 605
 606         p = buf;
 607         p = put_u64(p, dentry->creation_time);
 608         p = put_u64(p, dentry->last_write_time);
 609         p = put_u64(p, dentry->last_access_time);
 610         ret = ntfs_inode_set_times(ni, buf, 3 * sizeof(u64), 0);
 611         if (ret != 0) {
 612                 ERROR_WITH_ERRNO("Failed to set NTFS timestamps on `%s'",
 613                                  dentry->full_path_utf8);
 614                 ret = WIMLIB_ERR_NTFS_3G;
 615         }
 616
 617         if (ntfs_inode_close(ni) != 0) {
 618                 if (ret == 0)
 619                         ret = WIMLIB_ERR_NTFS_3G;
 620                 ERROR_WITH_ERRNO("Failed to close NTFS inode for `%s'",
 621                                  dentry->full_path_utf8);
 622         }
 623         return ret;
 624 }
 625
 626 static int do_wim_apply_image_ntfs(WIMStruct *w, const char *device, int extract_flags)
 627 {
 628         ntfs_volume *vol;
 629         int ret;
 630
 631         DEBUG("Mounting NTFS volume `%s'", device);
 632         vol = ntfs_mount(device, 0);
 633         if (!vol) {
 634                 ERROR_WITH_ERRNO("Failed to mount NTFS volume `%s'", device);
 635                 return WIMLIB_ERR_NTFS_3G;
 636         }
 637         struct ntfs_apply_args args = {
 638                 .vol           = vol,
 639                 .extract_flags = extract_flags,
 640                 .w             = w,
 641         };
 642         ret = for_dentry_in_tree(wim_root_dentry(w), wim_apply_dentry_ntfs,
 643                                  &args);
 644
 645         if (ret != 0)
 646                 goto out;
 647         DEBUG("Setting NTFS timestamps");
 648         ret = for_dentry_in_tree_depth(wim_root_dentry(w),
 649                                        wim_apply_dentry_timestamps,
 650                                        &args);
 651 out:
 652         DEBUG("Unmounting NTFS volume `%s'", device);
 653         if (ntfs_umount(vol, FALSE) != 0) {
 654                 ERROR_WITH_ERRNO("Failed to unmount NTFS volume `%s'", device);
 655                 if (ret == 0)
 656                         ret = WIMLIB_ERR_NTFS_3G;
 657         }
 658         return ret;
 659 }
 660
 661
 662 /*
 663  * API entry point for applying a WIM image to a NTFS volume.
 664  *
 665  * Please note that this is a NTFS *volume* and not a directory.  The intention
 666  * is that the volume contain an empty filesystem, and the WIM image contain a
 667  * full filesystem to be applied to the volume.
 668  */
 669 WIMLIBAPI int wimlib_apply_image_to_ntfs_volume(WIMStruct *w, int image,
 670                                                 const char *device, int flags)
 671 {
 672         int ret;
 673
 674         if (!device)
 675                 return WIMLIB_ERR_INVALID_PARAM;
 676         if (image == WIM_ALL_IMAGES) {
 677                 ERROR("Can only apply a single image when applying "
 678                       "directly to a NTFS volume");
 679                 return WIMLIB_ERR_INVALID_PARAM;
 680         }
 681         if (flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK)) {
 682                 ERROR("Cannot specify symlink or hardlink flags when applying ");
 683                 ERROR("directly to a NTFS volume");
 684                 return WIMLIB_ERR_INVALID_PARAM;
 685         }
 686         ret = wimlib_select_image(w, image);
 687         if (ret != 0)
 688                 return ret;
 689
 690 #if 0
 691         if (getuid() != 0) {
 692                 ERROR("We are not root, but NTFS-3g requires root privileges to set arbitrary");
 693                 ERROR("security data on the NTFS filesystem.  Please run this program as root");
 694                 ERROR("if you want to extract a WIM image while preserving NTFS-specific");
 695                 ERROR("information.");
 696
 697                 return WIMLIB_ERR_NOT_ROOT;
 698         }
 699 #endif
 700         return do_wim_apply_image_ntfs(w, device, flags);
 701 }
 702
 703 #else /* WITH_NTFS_3G */
 704 WIMLIBAPI int wimlib_apply_image_to_ntfs_volume(WIMStruct *w, int image,
 705                                                 const char *device, int flags)
 706 {
 707         ERROR("wimlib was compiled without support for NTFS-3g, so");
 708         ERROR("we cannot apply a WIM image directly to a NTFS volume");
 709         return WIMLIB_ERR_UNSUPPORTED;
 710 }
 711 #endif /* WITH_NTFS_3G */