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