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   1 /*
   2  * ntfs-apply.c
   3  *
   4  * Apply a WIM image to a NTFS volume.  We restore everything we can, including
   5  * security data and alternate data streams.
   6  */
   7
   8 /*
   9  * Copyright (C) 2012 Eric Biggers
  10  *
  11  * This file is part of wimlib, a library for working with WIM files.
  12  *
  13  * wimlib is free software; you can redistribute it and/or modify it under the
  14  * terms of the GNU General Public License as published by the Free
  15  * Software Foundation; either version 3 of the License, or (at your option)
  16  * any later version.
  17  *
  18  * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
  19  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  20  * A PARTICULAR PURPOSE. See the GNU General Public License for more
  21  * details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with wimlib; if not, see http://www.gnu.org/licenses/.
  25  */
  26
  27
  28 #include "config.h"
  29
  30 #ifdef WITH_NTFS_3G
  31 #include <ntfs-3g/endians.h>
  32 #include <ntfs-3g/types.h>
  33 #endif
  34
  35 #include "wimlib_internal.h"
  36
  37
  38 #ifdef WITH_NTFS_3G
  39 #include "dentry.h"
  40 #include "lookup_table.h"
  41 #include "io.h"
  42 #include <ntfs-3g/layout.h>
  43 #include <ntfs-3g/acls.h>
  44 #include <ntfs-3g/attrib.h>
  45 #include <ntfs-3g/security.h> /* security.h before xattrs.h */
  46 #include <ntfs-3g/xattrs.h>
  47 #include <ntfs-3g/reparse.h>
  48 #include <stdlib.h>
  49 #include <unistd.h>
  50
  51 struct ntfs_apply_args {
  52         ntfs_volume *vol;
  53         int extract_flags;
  54         WIMStruct *w;
  55 };
  56
  57 /*
  58  * Extracts a WIM resource to a NTFS attribute.
  59  */
  60 static int
  61 extract_wim_resource_to_ntfs_attr(const struct lookup_table_entry *lte,
  62                                   ntfs_attr *na)
  63 {
  64         u64 bytes_remaining = wim_resource_size(lte);
  65         u8 buf[min(WIM_CHUNK_SIZE, bytes_remaining)];
  66         u64 offset = 0;
  67         int ret = 0;
  68         u8 hash[SHA1_HASH_SIZE];
  69
  70         SHA_CTX ctx;
  71         sha1_init(&ctx);
  72
  73         while (bytes_remaining) {
  74                 u64 to_read = min(bytes_remaining, WIM_CHUNK_SIZE);
  75                 ret = read_wim_resource(lte, buf, to_read, offset, 0);
  76                 if (ret != 0)
  77                         break;
  78                 sha1_update(&ctx, buf, to_read);
  79                 if (ntfs_attr_pwrite(na, offset, to_read, buf) != to_read) {
  80                         ERROR_WITH_ERRNO("Error extracting WIM resource");
  81                         return WIMLIB_ERR_WRITE;
  82                 }
  83                 bytes_remaining -= to_read;
  84                 offset += to_read;
  85         }
  86         sha1_final(hash, &ctx);
  87         if (!hashes_equal(hash, lte->hash)) {
  88                 ERROR("Invalid checksum on a WIM resource "
  89                       "(detected when extracting to NTFS stream)");
  90                 ERROR("The following WIM resource is invalid:");
  91                 print_lookup_table_entry(lte);
  92                 return WIMLIB_ERR_INVALID_RESOURCE_HASH;
  93         }
  94         return 0;
  95 }
  96
  97 /* Writes the data streams to a NTFS file
  98  *
  99  * @ni:      The NTFS inode for the file.
 100  * @inode:   The WIM dentry that has an inode containing the streams.
 101  * @w:       The WIMStruct for the WIM containing the image we are applying.
 102  *
 103  * Returns 0 on success, nonzero on failure.
 104  */
 105 static int write_ntfs_data_streams(ntfs_inode *ni, const struct dentry *dentry,
 106                                    WIMStruct *w)
 107 {
 108         int ret = 0;
 109         unsigned stream_idx = 0;
 110         ntfschar *stream_name = AT_UNNAMED;
 111         u32 stream_name_len = 0;
 112         const struct inode *inode = dentry->d_inode;
 113
 114         DEBUG("Writing %u NTFS data stream%s for `%s'",
 115               inode->num_ads + 1,
 116               (inode->num_ads == 0 ? "" : "s"),
 117               dentry->full_path_utf8);
 118
 119         while (1) {
 120                 struct lookup_table_entry *lte;
 121                 ntfs_attr *na;
 122
 123                 lte = inode_stream_lte(inode, stream_idx, w->lookup_table);
 124
 125                 if (stream_name_len) {
 126                         /* Create an empty named stream. */
 127                         ret = ntfs_attr_add(ni, AT_DATA, stream_name,
 128                                             stream_name_len, NULL, 0);
 129                         if (ret != 0) {
 130                                 ERROR_WITH_ERRNO("Failed to create name data "
 131                                                  "stream for extracted file "
 132                                                  "`%s'",
 133                                                  dentry->full_path_utf8);
 134                                 ret = WIMLIB_ERR_NTFS_3G;
 135                                 break;
 136
 137                         }
 138                 }
 139                 /* If there's no lookup table entry, it's an empty stream.
 140                  * Otherwise, we must open the attribute and extract the data.
 141                  * */
 142                 if (lte) {
 143                         na = ntfs_attr_open(ni, AT_DATA, stream_name, stream_name_len);
 144                         if (!na) {
 145                                 ERROR_WITH_ERRNO("Failed to open a data stream of "
 146                                                  "extracted file `%s'",
 147                                                  dentry->full_path_utf8);
 148                                 ret = WIMLIB_ERR_NTFS_3G;
 149                                 break;
 150                         }
 151                         ret = extract_wim_resource_to_ntfs_attr(lte, na);
 152                         if (ret != 0)
 153                                 break;
 154                         ntfs_attr_close(na);
 155                 }
 156                 if (stream_idx == inode->num_ads)
 157                         break;
 158                 stream_name = (ntfschar*)inode->ads_entries[stream_idx].stream_name;
 159                 stream_name_len = inode->ads_entries[stream_idx].stream_name_len / 2;
 160                 stream_idx++;
 161         }
 162         return ret;
 163 }
 164
 165 /*
 166  * Makes a NTFS hard link
 167  *
 168  * It is named @from_dentry->file_name and is located under the directory
 169  * specified by @dir_ni, and it is made to point to the previously extracted
 170  * file located at @inode->extracted_file.
 171  *
 172  * Return 0 on success, nonzero on failure.
 173  */
 174 static int wim_apply_hardlink_ntfs(const struct dentry *from_dentry,
 175                                    const struct inode *inode,
 176                                    ntfs_inode *dir_ni,
 177                                    ntfs_inode **to_ni_ret)
 178 {
 179         int ret;
 180         char *p;
 181         char orig;
 182         const char *dir_name;
 183
 184         ntfs_inode *to_ni;
 185         ntfs_volume *vol;
 186
 187         wimlib_assert(dentry_is_regular_file(from_dentry)
 188                         && inode_is_regular_file(inode));
 189
 190         if (ntfs_inode_close(dir_ni) != 0) {
 191                 ERROR_WITH_ERRNO("Error closing directory");
 192                 return WIMLIB_ERR_NTFS_3G;
 193         }
 194
 195         vol = dir_ni->vol;
 196
 197         DEBUG("Extracting NTFS hard link `%s' => `%s'",
 198               from_dentry->full_path_utf8, inode->extracted_file);
 199
 200         to_ni = ntfs_pathname_to_inode(vol, NULL, inode->extracted_file);
 201         if (!to_ni) {
 202                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 203                                  inode->extracted_file);
 204                 return WIMLIB_ERR_NTFS_3G;
 205         }
 206         p = from_dentry->full_path_utf8 + from_dentry->full_path_utf8_len;
 207         do {
 208                 p--;
 209         } while (*p != '/');
 210
 211         orig = *p;
 212         *p = '\0';
 213         dir_name = from_dentry->full_path_utf8;
 214
 215         dir_ni = ntfs_pathname_to_inode(vol, NULL, dir_name);
 216         if (!dir_ni) {
 217                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 218                                  from_dentry->full_path_utf8);
 219                 *p = orig;
 220                 return WIMLIB_ERR_NTFS_3G;
 221         }
 222         *p = orig;
 223
 224         ret = ntfs_link(to_ni, dir_ni,
 225                         (ntfschar*)from_dentry->file_name,
 226                         from_dentry->file_name_len / 2);
 227         if (ret != 0) {
 228                 ERROR_WITH_ERRNO("Could not create hard link `%s' => `%s'",
 229                                  from_dentry->full_path_utf8,
 230                                  inode->extracted_file);
 231                 ret = WIMLIB_ERR_NTFS_3G;
 232         }
 233         *to_ni_ret = to_ni;
 234         return ret;
 235 }
 236
 237 static int
 238 apply_file_attributes_and_security_data(ntfs_inode *ni,
 239                                         ntfs_inode *dir_ni,
 240                                         const struct dentry *dentry,
 241                                         const WIMStruct *w)
 242 {
 243         DEBUG("Setting NTFS file attributes on `%s' to %#"PRIx32,
 244               dentry->full_path_utf8, dentry->d_inode->attributes);
 245         int ret;
 246         struct SECURITY_CONTEXT ctx;
 247         u32 attributes_le32;
 248         attributes_le32 = cpu_to_le32(dentry->d_inode->attributes);
 249         memset(&ctx, 0, sizeof(ctx));
 250         ctx.vol = ni->vol;
 251         ret = ntfs_xattr_system_setxattr(&ctx, XATTR_NTFS_ATTRIB,
 252                                          ni, dir_ni,
 253                                          (const char*)&attributes_le32,
 254                                          sizeof(u32), 0);
 255         if (ret != 0) {
 256                 ERROR("Failed to set NTFS file attributes on `%s'",
 257                        dentry->full_path_utf8);
 258                 return WIMLIB_ERR_NTFS_3G;
 259         }
 260         if (dentry->d_inode->security_id != -1) {
 261                 const struct wim_security_data *sd;
 262                 const char *descriptor;
 263
 264                 sd = wim_const_security_data(w);
 265                 wimlib_assert(dentry->d_inode->security_id < sd->num_entries);
 266                 descriptor = (const char *)sd->descriptors[dentry->d_inode->security_id];
 267                 DEBUG("Applying security descriptor %d to `%s'",
 268                       dentry->d_inode->security_id, dentry->full_path_utf8);
 269
 270                 ret = ntfs_xattr_system_setxattr(&ctx, XATTR_NTFS_ACL,
 271                                                  ni, dir_ni, descriptor,
 272                                                  sd->sizes[dentry->d_inode->security_id], 0);
 273
 274                 if (ret != 0) {
 275                         ERROR_WITH_ERRNO("Failed to set security data on `%s'",
 276                                         dentry->full_path_utf8);
 277                         return WIMLIB_ERR_NTFS_3G;
 278                 }
 279         }
 280         return 0;
 281 }
 282
 283 static int apply_reparse_data(ntfs_inode *ni, const struct dentry *dentry,
 284                               const WIMStruct *w)
 285 {
 286         struct lookup_table_entry *lte;
 287         int ret = 0;
 288
 289         wimlib_assert(dentry->d_inode->attributes & FILE_ATTRIBUTE_REPARSE_POINT);
 290
 291         lte = inode_unnamed_lte(dentry->d_inode, w->lookup_table);
 292
 293         DEBUG("Applying reparse data to `%s'", dentry->full_path_utf8);
 294
 295         if (!lte) {
 296                 ERROR("Could not find reparse data for `%s'",
 297                       dentry->full_path_utf8);
 298                 return WIMLIB_ERR_INVALID_DENTRY;
 299         }
 300
 301         if (wim_resource_size(lte) >= 0xffff) {
 302                 ERROR("Reparse data of `%s' is too long (%"PRIu64" bytes)",
 303                       dentry->full_path_utf8, wim_resource_size(lte));
 304                 return WIMLIB_ERR_INVALID_DENTRY;
 305         }
 306
 307         u8 reparse_data_buf[8 + wim_resource_size(lte)];
 308         u8 *p = reparse_data_buf;
 309         p = put_u32(p, dentry->d_inode->reparse_tag); /* ReparseTag */
 310         p = put_u16(p, wim_resource_size(lte)); /* ReparseDataLength */
 311         p = put_u16(p, 0); /* Reserved */
 312
 313         ret = read_full_wim_resource(lte, p, 0);
 314         if (ret != 0)
 315                 return ret;
 316
 317         ret = ntfs_set_ntfs_reparse_data(ni, (char*)reparse_data_buf,
 318                                          wim_resource_size(lte) + 8, 0);
 319         if (ret != 0) {
 320                 ERROR_WITH_ERRNO("Failed to set NTFS reparse data on `%s'",
 321                                  dentry->full_path_utf8);
 322                 return WIMLIB_ERR_NTFS_3G;
 323         }
 324         return 0;
 325 }
 326
 327 static int do_wim_apply_dentry_ntfs(struct dentry *dentry, ntfs_inode *dir_ni,
 328                                     WIMStruct *w);
 329
 330 /*
 331  * If @dentry is part of a hard link group, search for hard-linked dentries in
 332  * the same directory that have a nonempty DOS (short) filename.  There should
 333  * be exactly 0 or 1 such dentries.  If there is 1, extract that dentry first,
 334  * so that the DOS name is correctly associated with the corresponding long name
 335  * in the Win32 namespace, and not any of the additional names in the POSIX
 336  * namespace created from hard links.
 337  */
 338 static int preapply_dentry_with_dos_name(struct dentry *dentry,
 339                                          ntfs_inode **dir_ni_p,
 340                                          WIMStruct *w)
 341 {
 342         struct dentry *other;
 343         struct dentry *dentry_with_dos_name;
 344
 345         dentry_with_dos_name = NULL;
 346         inode_for_each_dentry(other, dentry->d_inode) {
 347                 if (other != dentry && (dentry->parent == other->parent)
 348                     && other->short_name_len)
 349                 {
 350                         if (dentry_with_dos_name) {
 351                                 ERROR("Found multiple DOS names for file `%s' "
 352                                       "in the same directory",
 353                                       dentry_with_dos_name->full_path_utf8);
 354                                 return WIMLIB_ERR_INVALID_DENTRY;
 355                         }
 356                         dentry_with_dos_name = other;
 357                 }
 358         }
 359         /* If there's a dentry with a DOS name, extract it first */
 360         if (dentry_with_dos_name && !dentry_is_extracted(dentry)) {
 361                 char *p;
 362                 const char *dir_name;
 363                 char orig;
 364                 int ret;
 365                 ntfs_volume *vol = (*dir_ni_p)->vol;
 366
 367                 DEBUG("pre-applying DOS name `%s'",
 368                       dentry_with_dos_name->full_path_utf8);
 369                 ret = do_wim_apply_dentry_ntfs(dentry_with_dos_name,
 370                                                *dir_ni_p, w);
 371                 if (ret != 0)
 372                         return ret;
 373                 p = dentry->full_path_utf8 + dentry->full_path_utf8_len;
 374                 do {
 375                         p--;
 376                 } while (*p != '/');
 377
 378                 orig = *p;
 379                 *p = '\0';
 380                 dir_name = dentry->full_path_utf8;
 381
 382                 *dir_ni_p = ntfs_pathname_to_inode(vol, NULL, dir_name);
 383                 *p = orig;
 384                 if (!*dir_ni_p) {
 385                         ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 386                                          dir_name);
 387                         return WIMLIB_ERR_NTFS_3G;
 388                 }
 389         }
 390         return 0;
 391 }
 392
 393 /*
 394  * Applies a WIM dentry to a NTFS filesystem.
 395  *
 396  * @dentry:  The WIM dentry to apply
 397  * @dir_ni:  The NTFS inode for the parent directory
 398  * @w:       The WIMStruct for the WIM containing the image we are applying.
 399  *
 400  * @return:  0 on success; nonzero on failure.
 401  */
 402 static int do_wim_apply_dentry_ntfs(struct dentry *dentry, ntfs_inode *dir_ni,
 403                                     WIMStruct *w)
 404 {
 405         int ret = 0;
 406         mode_t type;
 407         ntfs_inode *ni = NULL;
 408         bool is_hardlink = false;
 409         ntfs_volume *vol = dir_ni->vol;
 410         struct inode *inode = dentry->d_inode;
 411         dentry->is_extracted = true;
 412
 413         if (inode->attributes & FILE_ATTRIBUTE_DIRECTORY) {
 414                 type = S_IFDIR;
 415         } else {
 416                 /* Apply hard-linked directory in same directory with DOS name
 417                  * (if there is one) before this dentry */
 418                 if (dentry->short_name_len == 0) {
 419                         ret = preapply_dentry_with_dos_name(dentry,
 420                                                             &dir_ni, w);
 421                         if (ret != 0)
 422                                 return ret;
 423                 }
 424
 425                 type = S_IFREG;
 426
 427                 if (inode->link_count > 1) {
 428                         /* Already extracted another dentry in the hard link
 429                          * group.  We can make a hard link instead of extracting
 430                          * the file data. */
 431                         if (inode->extracted_file) {
 432                                 ret = wim_apply_hardlink_ntfs(dentry, inode,
 433                                                               dir_ni, &ni);
 434                                 is_hardlink = true;
 435                                 if (ret)
 436                                         goto out_close_dir_ni;
 437                                 else
 438                                         goto out_set_dos_name;
 439                         }
 440                         /* Can't make a hard link; extract the file itself */
 441                         FREE(inode->extracted_file);
 442                         inode->extracted_file = STRDUP(dentry->full_path_utf8);
 443                         if (!inode->extracted_file) {
 444                                 ret = WIMLIB_ERR_NOMEM;
 445                                 goto out_close_dir_ni;
 446                         }
 447                 }
 448         }
 449
 450         /*
 451          * Create a directory or file.
 452          *
 453          * Note: For symbolic links that are not directory junctions, pass
 454          * S_IFREG here, since we manually set the reparse data later.
 455          */
 456         ni = ntfs_create(dir_ni, 0, (ntfschar*)dentry->file_name,
 457                          dentry->file_name_len / 2, type);
 458
 459         if (!ni) {
 460                 ERROR_WITH_ERRNO("Could not create NTFS object for `%s'",
 461                                  dentry->full_path_utf8);
 462                 ret = WIMLIB_ERR_NTFS_3G;
 463                 goto out_close_dir_ni;
 464         }
 465
 466         /* Write the data streams, unless this is a directory or reparse point
 467          * */
 468         if (!(inode->attributes & (FILE_ATTRIBUTE_REPARSE_POINT |
 469                                    FILE_ATTRIBUTE_DIRECTORY))) {
 470                 ret = write_ntfs_data_streams(ni, dentry, w);
 471                 if (ret != 0)
 472                         goto out_close_dir_ni;
 473         }
 474
 475
 476         ret = apply_file_attributes_and_security_data(ni, dir_ni, dentry, w);
 477         if (ret != 0)
 478                 goto out_close_dir_ni;
 479
 480         if (inode->attributes & FILE_ATTR_REPARSE_POINT) {
 481                 ret = apply_reparse_data(ni, dentry, w);
 482                 if (ret != 0)
 483                         goto out_close_dir_ni;
 484         }
 485
 486 out_set_dos_name:
 487         /* Set DOS (short) name if given */
 488         if (dentry->short_name_len != 0) {
 489
 490                 char *short_name_utf8;
 491                 size_t short_name_utf8_len;
 492                 short_name_utf8 = utf16_to_utf8(dentry->short_name,
 493                                                 dentry->short_name_len,
 494                                                 &short_name_utf8_len);
 495                 if (!short_name_utf8) {
 496                         ERROR("Out of memory");
 497                         ret = WIMLIB_ERR_NOMEM;
 498                         goto out_close_dir_ni;
 499                 }
 500
 501                 if (is_hardlink) {
 502                         char *p;
 503                         char orig;
 504                         const char *dir_name;
 505
 506                         /* ntfs_set_ntfs_dos_name() closes the inodes in the
 507                          * wrong order if we have applied a hard link.   Close
 508                          * them ourselves, then re-open then. */
 509                         if (ntfs_inode_close(dir_ni) != 0) {
 510                                 if (ret == 0)
 511                                         ret = WIMLIB_ERR_NTFS_3G;
 512                                 ERROR_WITH_ERRNO("Failed to close directory inode");
 513                         }
 514                         if (ntfs_inode_close(ni) != 0) {
 515                                 if (ret == 0)
 516                                         ret = WIMLIB_ERR_NTFS_3G;
 517                                 ERROR_WITH_ERRNO("Failed to close hard link target inode");
 518                         }
 519                         p = dentry->full_path_utf8 + dentry->full_path_utf8_len;
 520                         do {
 521                                 p--;
 522                         } while (*p != '/');
 523
 524                         orig = *p;
 525                         *p = '\0';
 526                         dir_name = dentry->full_path_utf8;
 527
 528                         dir_ni = ntfs_pathname_to_inode(vol, NULL, dir_name);
 529                         *p = orig;
 530                         if (!dir_ni) {
 531                                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 532                                                  dir_name);
 533                                 return WIMLIB_ERR_NTFS_3G;
 534                         }
 535                         ni = ntfs_pathname_to_inode(vol, dir_ni,
 536                                                     dentry->file_name_utf8);
 537                         if (!ni) {
 538                                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 539                                                  dir_name);
 540                                 return WIMLIB_ERR_NTFS_3G;
 541                         }
 542                 }
 543
 544                 DEBUG("Setting short (DOS) name of `%s' to %s",
 545                       dentry->full_path_utf8, short_name_utf8);
 546
 547                 ret = ntfs_set_ntfs_dos_name(ni, dir_ni, short_name_utf8,
 548                                              short_name_utf8_len, 0);
 549                 FREE(short_name_utf8);
 550                 if (ret != 0) {
 551                         ERROR_WITH_ERRNO("Could not set DOS (short) name for `%s'",
 552                                          dentry->full_path_utf8);
 553                         ret = WIMLIB_ERR_NTFS_3G;
 554                 }
 555                 /* inodes have been closed by ntfs_set_ntfs_dos_name(). */
 556                 return ret;
 557         }
 558
 559 out_close_dir_ni:
 560         if (ntfs_inode_close(dir_ni) != 0) {
 561                 if (ret == 0)
 562                         ret = WIMLIB_ERR_NTFS_3G;
 563                 ERROR_WITH_ERRNO("Failed to close directory inode");
 564         }
 565         if (ni && ntfs_inode_close(ni) != 0) {
 566                 if (ret == 0)
 567                         ret = WIMLIB_ERR_NTFS_3G;
 568                 ERROR_WITH_ERRNO("Failed to close inode");
 569         }
 570         return ret;
 571 }
 572
 573 static int wim_apply_root_dentry_ntfs(const struct dentry *dentry,
 574                                       ntfs_volume *vol,
 575                                       const WIMStruct *w)
 576 {
 577         ntfs_inode *ni;
 578         int ret = 0;
 579
 580         wimlib_assert(dentry_is_directory(dentry));
 581         ni = ntfs_pathname_to_inode(vol, NULL, "/");
 582         if (!ni) {
 583                 ERROR_WITH_ERRNO("Could not find root NTFS inode");
 584                 return WIMLIB_ERR_NTFS_3G;
 585         }
 586         ret = apply_file_attributes_and_security_data(ni, ni, dentry, w);
 587         if (ntfs_inode_close(ni) != 0) {
 588                 ERROR_WITH_ERRNO("Failed to close NTFS inode for root "
 589                                  "directory");
 590                 ret = WIMLIB_ERR_NTFS_3G;
 591         }
 592         return ret;
 593 }
 594
 595 /* Applies a WIM dentry to the NTFS volume */
 596 static int wim_apply_dentry_ntfs(struct dentry *dentry, void *arg)
 597 {
 598         struct ntfs_apply_args *args = arg;
 599         ntfs_volume *vol             = args->vol;
 600         int extract_flags            = args->extract_flags;
 601         WIMStruct *w                 = args->w;
 602         ntfs_inode *dir_ni;
 603         char *p;
 604         char orig;
 605         const char *dir_name;
 606
 607         if (dentry_is_extracted(dentry))
 608                 return 0;
 609
 610         wimlib_assert(dentry->full_path_utf8);
 611
 612         DEBUG("Applying dentry `%s' to NTFS", dentry->full_path_utf8);
 613
 614         if (extract_flags & WIMLIB_EXTRACT_FLAG_VERBOSE)
 615                 puts(dentry->full_path_utf8);
 616
 617         if (dentry_is_root(dentry))
 618                 return wim_apply_root_dentry_ntfs(dentry, vol, w);
 619
 620         p = dentry->full_path_utf8 + dentry->full_path_utf8_len;
 621         do {
 622                 p--;
 623         } while (*p != '/');
 624
 625         orig = *p;
 626         *p = '\0';
 627         dir_name = dentry->full_path_utf8;
 628
 629         dir_ni = ntfs_pathname_to_inode(vol, NULL, dir_name);
 630         *p = orig;
 631         if (!dir_ni) {
 632                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 633                                  dir_name);
 634                 return WIMLIB_ERR_NTFS_3G;
 635         }
 636         return do_wim_apply_dentry_ntfs(dentry, dir_ni, w);
 637 }
 638
 639 static int wim_apply_dentry_timestamps(struct dentry *dentry, void *arg)
 640 {
 641         struct ntfs_apply_args *args = arg;
 642         ntfs_volume *vol             = args->vol;
 643         u8 *p;
 644         u8 buf[24];
 645         ntfs_inode *ni;
 646         int ret = 0;
 647
 648
 649         DEBUG("Setting timestamps on `%s'", dentry->full_path_utf8);
 650
 651         ni = ntfs_pathname_to_inode(vol, NULL, dentry->full_path_utf8);
 652         if (!ni) {
 653                 ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'",
 654                                  dentry->full_path_utf8);
 655                 return WIMLIB_ERR_NTFS_3G;
 656         }
 657
 658         p = buf;
 659         p = put_u64(p, dentry->d_inode->creation_time);
 660         p = put_u64(p, dentry->d_inode->last_write_time);
 661         p = put_u64(p, dentry->d_inode->last_access_time);
 662         ret = ntfs_inode_set_times(ni, (const char*)buf, 3 * sizeof(u64), 0);
 663         if (ret != 0) {
 664                 ERROR_WITH_ERRNO("Failed to set NTFS timestamps on `%s'",
 665                                  dentry->full_path_utf8);
 666                 ret = WIMLIB_ERR_NTFS_3G;
 667         }
 668
 669         if (ntfs_inode_close(ni) != 0) {
 670                 if (ret == 0)
 671                         ret = WIMLIB_ERR_NTFS_3G;
 672                 ERROR_WITH_ERRNO("Failed to close NTFS inode for `%s'",
 673                                  dentry->full_path_utf8);
 674         }
 675         return ret;
 676 }
 677
 678 static int dentry_set_unextracted(struct dentry *dentry, void *ignore)
 679 {
 680         dentry->is_extracted = false;
 681         return 0;
 682 }
 683
 684 static int do_wim_apply_image_ntfs(WIMStruct *w, const char *device, int extract_flags)
 685 {
 686         ntfs_volume *vol;
 687         int ret;
 688         struct dentry *root;
 689         struct ntfs_apply_args args;
 690
 691         DEBUG("Mounting NTFS volume `%s'", device);
 692         vol = ntfs_mount(device, 0);
 693         if (!vol) {
 694                 ERROR_WITH_ERRNO("Failed to mount NTFS volume `%s'", device);
 695                 return WIMLIB_ERR_NTFS_3G;
 696         }
 697         args.vol = vol;
 698         args.extract_flags = extract_flags;
 699         args.w = w;
 700         root = wim_root_dentry(w);
 701
 702         for_dentry_in_tree(root, dentry_set_unextracted, NULL);
 703         ret = for_dentry_in_tree(root, wim_apply_dentry_ntfs, &args);
 704         if (ret != 0)
 705                 goto out;
 706
 707         if (extract_flags & WIMLIB_EXTRACT_FLAG_VERBOSE)
 708                 printf("Setting timestamps of extracted files on NTFS "
 709                        "volume `%s'\n", device);
 710         ret = for_dentry_in_tree_depth(root, wim_apply_dentry_timestamps,
 711                                        &args);
 712
 713         if (ret == 0 && (extract_flags & WIMLIB_EXTRACT_FLAG_VERBOSE))
 714                 printf("Finished applying image %d of %s to NTFS "
 715                        "volume `%s'\n",
 716                        w->current_image,
 717                        w->filename ? w->filename : "WIM",
 718                        device);
 719 out:
 720         DEBUG("Unmounting NTFS volume `%s'", device);
 721         if (ntfs_umount(vol, FALSE) != 0) {
 722                 ERROR_WITH_ERRNO("Failed to unmount NTFS volume `%s'", device);
 723                 if (ret == 0)
 724                         ret = WIMLIB_ERR_NTFS_3G;
 725         }
 726         return ret;
 727 }
 728
 729
 730 /*
 731  * API entry point for applying a WIM image to a NTFS volume.
 732  *
 733  * Please note that this is a NTFS *volume* and not a directory.  The intention
 734  * is that the volume contain an empty filesystem, and the WIM image contain a
 735  * full filesystem to be applied to the volume.
 736  */
 737 WIMLIBAPI int wimlib_apply_image_to_ntfs_volume(WIMStruct *w, int image,
 738                                                 const char *device, int flags,
 739                                                 WIMStruct **additional_swms,
 740                                                 unsigned num_additional_swms)
 741 {
 742         struct lookup_table *joined_tab, *w_tab_save;
 743         int ret;
 744
 745         DEBUG("w->filename = %s, image = %d, device = %s, flags = 0x%x, "
 746               "num_additional_swms = %u",
 747               w->filename, image, device, flags, num_additional_swms);
 748
 749         if (!w || !device)
 750                 return WIMLIB_ERR_INVALID_PARAM;
 751         if (image == WIM_ALL_IMAGES) {
 752                 ERROR("Can only apply a single image when applying "
 753                       "directly to a NTFS volume");
 754                 return WIMLIB_ERR_INVALID_PARAM;
 755         }
 756         if (flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK)) {
 757                 ERROR("Cannot specify symlink or hardlink flags when applying ");
 758                 ERROR("directly to a NTFS volume");
 759                 return WIMLIB_ERR_INVALID_PARAM;
 760         }
 761
 762         ret = verify_swm_set(w, additional_swms, num_additional_swms);
 763         if (ret != 0)
 764                 return ret;
 765
 766         if (num_additional_swms) {
 767                 ret = new_joined_lookup_table(w, additional_swms,
 768                                               num_additional_swms, &joined_tab);
 769                 if (ret != 0)
 770                         return ret;
 771                 w_tab_save = w->lookup_table;
 772                 w->lookup_table = joined_tab;
 773         }
 774
 775         ret = select_wim_image(w, image);
 776         if (ret != 0)
 777                 goto out;
 778
 779         ret = do_wim_apply_image_ntfs(w, device, flags);
 780
 781 out:
 782         if (num_additional_swms) {
 783                 free_lookup_table(w->lookup_table);
 784                 w->lookup_table = w_tab_save;
 785         }
 786         return ret;
 787 }
 788
 789 #else /* WITH_NTFS_3G */
 790 WIMLIBAPI int wimlib_apply_image_to_ntfs_volume(WIMStruct *w, int image,
 791                                                 const char *device, int flags,
 792                                                 WIMStruct **additional_swms,
 793                                                 unsigned num_additional_swms)
 794 {
 795         ERROR("wimlib was compiled without support for NTFS-3g, so");
 796         ERROR("we cannot apply a WIM image directly to a NTFS volume");
 797         return WIMLIB_ERR_UNSUPPORTED;
 798 }
 799 #endif /* WITH_NTFS_3G */