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   1 /*
   2  * extract.c
   3  *
   4  * Support for extracting WIM files.
   5  *
   6  * This code does NOT contain any filesystem-specific features.  In particular,
   7  * security information (i.e. file permissions) and alternate data streams are
   8  * ignored, except possibly to read an alternate data stream that contains
   9  * symbolic link data.
  10  */
  11
  12 /*
  13  * Copyright (C) 2010 Carl Thijssen
  14  * Copyright (C) 2012 Eric Biggers
  15  *
  16  * This file is part of wimlib, a library for working with WIM files.
  17  *
  18  * wimlib is free software; you can redistribute it and/or modify it under the
  19  * terms of the GNU General Public License as published by the Free
  20  * Software Foundation; either version 3 of the License, or (at your option)
  21  * any later version.
  22  *
  23  * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
  24  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  25  * A PARTICULAR PURPOSE. See the GNU General Public License for more
  26  * details.
  27  *
  28  * You should have received a copy of the GNU General Public License
  29  * along with wimlib; if not, see http://www.gnu.org/licenses/.
  30  */
  31
  32
  33 #include "config.h"
  34
  35 #include <dirent.h>
  36 #include <errno.h>
  37 #include <fcntl.h>
  38 #include <string.h>
  39 #include <sys/stat.h>
  40 #include <stdlib.h>
  41 #include <sys/time.h>
  42
  43 #ifdef HAVE_UTIME_H
  44 #include <utime.h>
  45 #endif
  46
  47 #include <unistd.h>
  48
  49 #include "dentry.h"
  50 #include "lookup_table.h"
  51 #include "timestamp.h"
  52 #include "wimlib_internal.h"
  53 #include "xml.h"
  54
  55
  56 static int extract_regular_file_linked(const struct dentry *dentry,
  57                                        const char *output_dir,
  58                                        const char *output_path,
  59                                        int extract_flags,
  60                                        struct lookup_table_entry *lte)
  61 {
  62         /* This mode overrides the normal hard-link extraction and
  63          * instead either symlinks or hardlinks *all* identical files in
  64          * the WIM, even if they are in a different image (in the case
  65          * of a multi-image extraction) */
  66         wimlib_assert(lte->extracted_file != NULL);
  67
  68         if (extract_flags & WIMLIB_EXTRACT_FLAG_HARDLINK) {
  69                 if (link(lte->extracted_file, output_path) != 0) {
  70                         ERROR_WITH_ERRNO("Failed to hard link "
  71                                          "`%s' to `%s'",
  72                                          output_path, lte->extracted_file);
  73                         return WIMLIB_ERR_LINK;
  74                 }
  75         } else {
  76                 int num_path_components;
  77                 int num_output_dir_path_components;
  78                 size_t extracted_file_len;
  79                 char *p;
  80                 const char *p2;
  81                 size_t i;
  82
  83                 wimlib_assert(extract_flags & WIMLIB_EXTRACT_FLAG_SYMLINK);
  84
  85                 num_path_components =
  86                         get_num_path_components(dentry->full_path_utf8) - 1;
  87                 num_output_dir_path_components =
  88                         get_num_path_components(output_dir);
  89
  90                 if (extract_flags & WIMLIB_EXTRACT_FLAG_MULTI_IMAGE) {
  91                         num_path_components++;
  92                         num_output_dir_path_components--;
  93                 }
  94                 extracted_file_len = strlen(lte->extracted_file);
  95
  96                 char buf[extracted_file_len + 3 * num_path_components + 1];
  97                 p = &buf[0];
  98
  99                 for (i = 0; i < num_path_components; i++) {
 100                         *p++ = '.';
 101                         *p++ = '.';
 102                         *p++ = '/';
 103                 }
 104                 p2 = lte->extracted_file;
 105                 while (*p2 == '/')
 106                         p2++;
 107                 while (num_output_dir_path_components--)
 108                         p2 = path_next_part(p2, NULL);
 109                 strcpy(p, p2);
 110                 if (symlink(buf, output_path) != 0) {
 111                         ERROR_WITH_ERRNO("Failed to symlink `%s' to "
 112                                          "`%s'",
 113                                          buf, lte->extracted_file);
 114                         return WIMLIB_ERR_LINK;
 115                 }
 116
 117         }
 118         return 0;
 119 }
 120
 121 static int extract_regular_file_unlinked(WIMStruct *w,
 122                                          struct dentry *dentry,
 123                                          const char *output_path,
 124                                          int extract_flags,
 125                                          struct lookup_table_entry *lte)
 126 {
 127         /* Normal mode of extraction.  Regular files and hard links are
 128          * extracted in the way that they appear in the WIM. */
 129
 130         int out_fd;
 131         int ret;
 132         struct inode *inode = dentry->d_inode;
 133
 134         if (!((extract_flags & WIMLIB_EXTRACT_FLAG_MULTI_IMAGE)
 135                 && (extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK |
 136                                      WIMLIB_EXTRACT_FLAG_HARDLINK))))
 137         {
 138                 /* If the dentry is one of a hard link set of at least 2
 139                  * dentries and one of the other dentries has already been
 140                  * extracted, make a hard link to the file corresponding to this
 141                  * already-extracted directory.  Otherwise, extract the file,
 142                  * and set the inode->extracted_file field so that other
 143                  * dentries in the hard link group can link to it. */
 144                 if (inode->link_count > 1) {
 145                         if (inode->extracted_file) {
 146                                 DEBUG("Extracting hard link `%s' => `%s'",
 147                                       output_path, inode->extracted_file);
 148                                 if (link(inode->extracted_file, output_path) != 0) {
 149                                         ERROR_WITH_ERRNO("Failed to hard link "
 150                                                          "`%s' to `%s'",
 151                                                          output_path,
 152                                                          inode->extracted_file);
 153                                         return WIMLIB_ERR_LINK;
 154                                 }
 155                                 return 0;
 156                         }
 157                         FREE(inode->extracted_file);
 158                         inode->extracted_file = STRDUP(output_path);
 159                         if (!inode->extracted_file) {
 160                                 ERROR("Failed to allocate memory for filename");
 161                                 return WIMLIB_ERR_NOMEM;
 162                         }
 163                 }
 164         }
 165
 166         /* Extract the contents of the file to @output_path. */
 167
 168         out_fd = open(output_path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 169         if (out_fd == -1) {
 170                 ERROR_WITH_ERRNO("Failed to open the file `%s' for writing",
 171                                  output_path);
 172                 return WIMLIB_ERR_OPEN;
 173         }
 174
 175         if (!lte) {
 176                 /* Empty file with no lookup table entry */
 177                 DEBUG("Empty file `%s'.", output_path);
 178                 ret = 0;
 179                 goto out;
 180         }
 181
 182         ret = extract_full_wim_resource_to_fd(lte, out_fd);
 183         if (ret != 0) {
 184                 ERROR("Failed to extract resource to `%s'", output_path);
 185                 goto out;
 186         }
 187
 188 out:
 189         if (close(out_fd) != 0) {
 190                 ERROR_WITH_ERRNO("Failed to close file `%s'", output_path);
 191                 ret = WIMLIB_ERR_WRITE;
 192         }
 193         return ret;
 194 }
 195
 196 /*
 197  * Extracts a regular file from the WIM archive.
 198  */
 199 static int extract_regular_file(WIMStruct *w,
 200                                 struct dentry *dentry,
 201                                 const char *output_dir,
 202                                 const char *output_path,
 203                                 int extract_flags)
 204 {
 205         struct lookup_table_entry *lte;
 206         const struct inode *inode = dentry->d_inode;
 207
 208         lte = inode_unnamed_lte(inode, w->lookup_table);
 209
 210         if ((extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK |
 211                               WIMLIB_EXTRACT_FLAG_HARDLINK)) && lte) {
 212                 if (lte->extracted_file) {
 213                         return extract_regular_file_linked(dentry, output_dir,
 214                                                            output_path,
 215                                                            extract_flags, lte);
 216                 } else {
 217                         lte->extracted_file = STRDUP(output_path);
 218                         if (!lte->extracted_file)
 219                                 return WIMLIB_ERR_NOMEM;
 220                 }
 221         }
 222
 223         return extract_regular_file_unlinked(w, dentry, output_path,
 224                                              extract_flags, lte);
 225
 226 }
 227
 228 static int extract_symlink(const struct dentry *dentry, const char *output_path,
 229                            const WIMStruct *w)
 230 {
 231         char target[4096];
 232         ssize_t ret = inode_readlink(dentry->d_inode, target,
 233                                      sizeof(target), w, 0);
 234         if (ret <= 0) {
 235                 ERROR("Could not read the symbolic link from dentry `%s'",
 236                       dentry->full_path_utf8);
 237                 return WIMLIB_ERR_INVALID_DENTRY;
 238         }
 239         ret = symlink(target, output_path);
 240         if (ret != 0) {
 241                 ERROR_WITH_ERRNO("Failed to symlink `%s' to `%s'",
 242                                  output_path, target);
 243                 return WIMLIB_ERR_LINK;
 244         }
 245         return 0;
 246 }
 247
 248 /*
 249  * Extracts a directory from the WIM archive.
 250  *
 251  * @dentry:             The directory entry for the directory.
 252  * @output_path:        The path to which the directory is to be extracted to.
 253  * @return:             True on success, false on failure.
 254  */
 255 static int extract_directory(const char *output_path, bool is_root)
 256 {
 257         int ret;
 258         struct stat stbuf;
 259         ret = stat(output_path, &stbuf);
 260         if (ret == 0) {
 261                 if (S_ISDIR(stbuf.st_mode)) {
 262                         /*if (!is_root)*/
 263                                 /*WARNING("`%s' already exists", output_path);*/
 264                         return 0;
 265                 } else {
 266                         ERROR("`%s' is not a directory", output_path);
 267                         return WIMLIB_ERR_MKDIR;
 268                 }
 269         } else {
 270                 if (errno != ENOENT) {
 271                         ERROR_WITH_ERRNO("Failed to stat `%s'", output_path);
 272                         return WIMLIB_ERR_STAT;
 273                 }
 274         }
 275         /* Compute the output path directory to the directory. */
 276         if (mkdir(output_path, S_IRWXU | S_IRGRP | S_IXGRP |
 277                                S_IROTH | S_IXOTH) != 0) {
 278                 ERROR_WITH_ERRNO("Cannot create directory `%s'",
 279                                  output_path);
 280                 return WIMLIB_ERR_MKDIR;
 281         }
 282         return 0;
 283 }
 284
 285 struct extract_args {
 286         WIMStruct *w;
 287         int extract_flags;
 288         const char *output_dir;
 289         unsigned num_lutimes_warnings;
 290 };
 291
 292 /*
 293  * Extracts a file, directory, or symbolic link from the WIM archive.  For use
 294  * in for_dentry_in_tree().
 295  */
 296 static int extract_dentry(struct dentry *dentry, void *arg)
 297 {
 298         struct extract_args *args = arg;
 299         WIMStruct *w = args->w;
 300         int extract_flags = args->extract_flags;
 301         size_t len = strlen(args->output_dir);
 302         char output_path[len + dentry->full_path_utf8_len + 1];
 303
 304         if (extract_flags & WIMLIB_EXTRACT_FLAG_NO_STREAMS)
 305                 if (inode_unnamed_lte(dentry->d_inode, w->lookup_table) != NULL)
 306                         return 0;
 307
 308         if (extract_flags & WIMLIB_EXTRACT_FLAG_VERBOSE) {
 309                 wimlib_assert(dentry->full_path_utf8);
 310                 puts(dentry->full_path_utf8);
 311         }
 312
 313         memcpy(output_path, args->output_dir, len);
 314         memcpy(output_path + len, dentry->full_path_utf8, dentry->full_path_utf8_len);
 315         output_path[len + dentry->full_path_utf8_len] = '\0';
 316
 317
 318         if (dentry_is_symlink(dentry))
 319                 return extract_symlink(dentry, output_path, w);
 320         else if (dentry_is_directory(dentry))
 321                 return extract_directory(output_path, dentry_is_root(dentry));
 322         else
 323                 return extract_regular_file(w, dentry, args->output_dir,
 324                                             output_path, extract_flags);
 325 }
 326
 327 /* Apply timestamp to extracted file */
 328 static int apply_dentry_timestamps(struct dentry *dentry, void *arg)
 329 {
 330         struct extract_args *args = arg;
 331         size_t len = strlen(args->output_dir);
 332         char output_path[len + dentry->full_path_utf8_len + 1];
 333         const struct inode *inode = dentry->d_inode;
 334         int ret;
 335
 336         memcpy(output_path, args->output_dir, len);
 337         memcpy(output_path + len, dentry->full_path_utf8, dentry->full_path_utf8_len);
 338         output_path[len + dentry->full_path_utf8_len] = '\0';
 339
 340         struct timeval tv[2];
 341         wim_timestamp_to_timeval(inode->last_access_time, &tv[0]);
 342         wim_timestamp_to_timeval(inode->last_write_time, &tv[1]);
 343         #ifdef HAVE_LUTIMES
 344         ret = lutimes(output_path, tv);
 345         #else
 346         ret = -1;
 347         errno = ENOSYS;
 348         #endif
 349         if (ret != 0) {
 350                 #ifdef HAVE_UTIME
 351                 if (errno == ENOSYS) {
 352                         struct utimbuf buf;
 353                         buf.actime = wim_timestamp_to_unix(inode->last_access_time);
 354                         buf.modtime = wim_timestamp_to_unix(inode->last_write_time);
 355                         if (utime(output_path, &buf) == 0)
 356                                 return 0;
 357                 }
 358                 #endif
 359                 if (errno != ENOSYS || args->num_lutimes_warnings < 10) {
 360                         /*WARNING("Failed to set timestamp on file `%s': %s",*/
 361                                 /*output_path, strerror(errno));*/
 362                         args->num_lutimes_warnings++;
 363                 }
 364         }
 365         return 0;
 366 }
 367
 368
 369 static int dentry_add_streams_for_extraction(struct dentry *dentry,
 370                                              void *wim)
 371 {
 372         WIMStruct *w = wim;
 373         struct list_head *stream_list;
 374         struct lookup_table_entry *lte;
 375
 376         lte = inode_unnamed_lte(dentry->d_inode, w->lookup_table);
 377         if (lte) {
 378                 if (++lte->out_refcnt == 1) {
 379                         INIT_LIST_HEAD(&lte->dentry_list);
 380                         stream_list = w->private;
 381                         list_add_tail(&lte->staging_list, stream_list);
 382                 }
 383                 list_add_tail(&dentry->tmp_list, &lte->dentry_list);
 384         }
 385         return 0;
 386 }
 387
 388 static int cmp_streams_by_wim_position(const void *p1, const void *p2)
 389 {
 390         const struct lookup_table_entry *lte1, *lte2;
 391         lte1 = *(const struct lookup_table_entry**)p1;
 392         lte2 = *(const struct lookup_table_entry**)p2;
 393         if (lte1->resource_entry.offset < lte2->resource_entry.offset)
 394                 return -1;
 395         else if (lte1->resource_entry.offset > lte2->resource_entry.offset)
 396                 return 1;
 397         else
 398                 return 0;
 399 }
 400
 401 static int sort_stream_list_by_wim_position(struct list_head *stream_list)
 402 {
 403         struct list_head *cur;
 404         size_t num_streams;
 405         struct lookup_table_entry **array;
 406         size_t i;
 407         size_t array_size;
 408
 409         DEBUG("Sorting stream list by wim position");
 410
 411         num_streams = 0;
 412         list_for_each(cur, stream_list)
 413                 num_streams++;
 414         array_size = num_streams * sizeof(array[0]);
 415
 416         DEBUG("num_streams = %zu", num_streams);
 417
 418         array = MALLOC(array_size);
 419         if (!array) {
 420                 ERROR("Failed to allocate %zu bytes to sort stream entries",
 421                       array_size);
 422                 return WIMLIB_ERR_NOMEM;
 423         }
 424         cur = stream_list->next;
 425         for (i = 0; i < num_streams; i++) {
 426                 array[i] = container_of(cur, struct lookup_table_entry, staging_list);
 427                 cur = cur->next;
 428         }
 429
 430         qsort(array, num_streams, sizeof(array[0]), cmp_streams_by_wim_position);
 431
 432         INIT_LIST_HEAD(stream_list);
 433         for (i = 0; i < num_streams; i++)
 434                 list_add_tail(&array[i]->staging_list, stream_list);
 435         FREE(array);
 436         return 0;
 437 }
 438
 439 static u64 calculate_bytes_to_extract(struct list_head *stream_list,
 440                                       int extract_flags)
 441 {
 442         struct lookup_table_entry *lte;
 443         struct dentry *dentry;
 444         u64 total_size = 0;
 445         list_for_each_entry(lte, stream_list, staging_list) {
 446                 u64 size = wim_resource_size(lte);
 447                 if (extract_flags &
 448                     (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK))
 449                 {
 450                         total_size += size;
 451                 } else {
 452                         list_for_each_entry(dentry, &lte->dentry_list,
 453                                             tmp_list)
 454                         {
 455                                 dentry->d_inode->found = false;
 456                         }
 457                         list_for_each_entry(dentry, &lte->dentry_list,
 458                                             tmp_list)
 459                         {
 460                                 if (!dentry->d_inode->found) {
 461                                         dentry->d_inode->found = true;
 462                                         total_size += size;
 463                                 }
 464                         }
 465                 }
 466         }
 467         return total_size;
 468 }
 469
 470 static int extract_single_image(WIMStruct *w, int image,
 471                                 const char *output_dir, int extract_flags)
 472 {
 473         int ret;
 474         struct dentry *root;
 475
 476         DEBUG("Extracting image %d", image);
 477
 478         ret = select_wim_image(w, image);
 479         if (ret != 0)
 480                 return ret;
 481
 482         root = wim_root_dentry(w);
 483
 484         struct extract_args args = {
 485                 .w                    = w,
 486                 .extract_flags        = extract_flags,
 487                 .output_dir           = output_dir,
 488                 .num_lutimes_warnings = 0,
 489         };
 490
 491         if (extract_flags & WIMLIB_EXTRACT_FLAG_SEQUENTIAL) {
 492                 for_lookup_table_entry(w->lookup_table, lte_zero_out_refcnt,
 493                                        NULL);
 494                 args.extract_flags |= WIMLIB_EXTRACT_FLAG_NO_STREAMS;
 495                 if (args.extract_flags & WIMLIB_EXTRACT_FLAG_SHOW_PROGRESS)
 496                         puts("Creating directory structure...");
 497         }
 498
 499         ret = for_dentry_in_tree(root, extract_dentry, &args);
 500         if (ret != 0)
 501                 return ret;
 502
 503         if (extract_flags & WIMLIB_EXTRACT_FLAG_SEQUENTIAL) {
 504                 struct list_head stream_list;
 505                 INIT_LIST_HEAD(&stream_list);
 506                 w->private = &stream_list;
 507                 for_dentry_in_tree(root, dentry_add_streams_for_extraction, w);
 508                 ret = sort_stream_list_by_wim_position(&stream_list);
 509                 args.extract_flags &= ~WIMLIB_EXTRACT_FLAG_NO_STREAMS;
 510                 if (ret == 0) {
 511                         struct lookup_table_entry *lte;
 512                         struct lookup_table_entry *tmp;
 513                         struct dentry *dentry;
 514                         u64 total_size;
 515                         u64 cur_size;
 516                         u64 next_size;
 517                         u64 one_percent;
 518                         unsigned cur_percent;
 519
 520                         total_size = calculate_bytes_to_extract(&stream_list, args.extract_flags);
 521                         one_percent = total_size / 100;
 522                         cur_size = 0;
 523                         next_size = 0;
 524                         cur_percent = 0;
 525                         puts("Extracting files...");
 526                         list_for_each_entry_safe(lte, tmp, &stream_list, staging_list) {
 527                                 list_del(&lte->staging_list);
 528                                 list_for_each_entry(dentry, &lte->dentry_list, tmp_list) {
 529                                         if ((!dentry->d_inode->extracted_file) &&
 530                                              (args.extract_flags & WIMLIB_EXTRACT_FLAG_SHOW_PROGRESS))
 531                                         {
 532                                                 show_stream_op_progress(&cur_size, &next_size,
 533                                                                         total_size, one_percent,
 534                                                                         &cur_percent, lte,
 535                                                                         "extracted");
 536                                         }
 537                                         ret = extract_dentry(dentry, &args);
 538                                         if (ret != 0)
 539                                                 return ret;
 540                                 }
 541                         }
 542                         finish_stream_op_progress(total_size, "extracted");
 543                 } else {
 544                         WARNING("Falling back to non-sequential image extraction");
 545                         ret = for_dentry_in_tree(root, extract_dentry, &args);
 546                         if (ret != 0)
 547                                 return ret;
 548                 }
 549         }
 550
 551         return for_dentry_in_tree_depth(root, apply_dentry_timestamps, &args);
 552
 553 }
 554
 555
 556 /* Extracts all images from the WIM to @output_dir, with the images placed in
 557  * subdirectories named by their image names. */
 558 static int extract_all_images(WIMStruct *w, const char *output_dir,
 559                               int extract_flags)
 560 {
 561         size_t image_name_max_len = max(xml_get_max_image_name_len(w), 20);
 562         size_t output_path_len = strlen(output_dir);
 563         char buf[output_path_len + 1 + image_name_max_len + 1];
 564         int ret;
 565         int image;
 566         const char *image_name;
 567
 568         DEBUG("Attempting to extract all images from `%s' to `%s'",
 569               w->filename, output_dir);
 570
 571         ret = extract_directory(output_dir, true);
 572         if (ret != 0)
 573                 return ret;
 574
 575         memcpy(buf, output_dir, output_path_len);
 576         buf[output_path_len] = '/';
 577         for (image = 1; image <= w->hdr.image_count; image++) {
 578
 579                 image_name = wimlib_get_image_name(w, image);
 580                 if (*image_name) {
 581                         strcpy(buf + output_path_len + 1, image_name);
 582                 } else {
 583                         /* Image name is empty. Use image number instead */
 584                         sprintf(buf + output_path_len + 1, "%d", image);
 585                 }
 586                 ret = extract_single_image(w, image, buf, extract_flags);
 587                 if (ret != 0)
 588                         return ret;
 589         }
 590         return 0;
 591 }
 592
 593 /* Extracts a single image or all images from a WIM file. */
 594 WIMLIBAPI int wimlib_extract_image(WIMStruct *w, int image,
 595                                    const char *output_dir,
 596                                    int extract_flags,
 597                                    WIMStruct **additional_swms,
 598                                    unsigned num_additional_swms)
 599 {
 600         struct lookup_table *joined_tab, *w_tab_save;
 601         int ret;
 602
 603         DEBUG("w->filename = %s, image = %d, output_dir = %s, flags = 0x%x, "
 604               "num_additional_swms = %u",
 605               w->filename, image, output_dir, extract_flags, num_additional_swms);
 606
 607         if (!w || !output_dir)
 608                 return WIMLIB_ERR_INVALID_PARAM;
 609
 610         extract_flags &= WIMLIB_EXTRACT_MASK_PUBLIC;
 611
 612         if ((extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK))
 613                         == (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK))
 614                 return WIMLIB_ERR_INVALID_PARAM;
 615
 616         ret = verify_swm_set(w, additional_swms, num_additional_swms);
 617         if (ret != 0)
 618                 return ret;
 619
 620         if (num_additional_swms) {
 621                 ret = new_joined_lookup_table(w, additional_swms,
 622                                               num_additional_swms, &joined_tab);
 623                 if (ret != 0)
 624                         return ret;
 625                 w_tab_save = w->lookup_table;
 626                 w->lookup_table = joined_tab;
 627         }
 628
 629         if (extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK |
 630                              WIMLIB_EXTRACT_FLAG_HARDLINK))
 631         {
 632                 for_lookup_table_entry(w->lookup_table,
 633                                        lte_zero_extracted_file,
 634                                        NULL);
 635                 extract_flags &= ~WIMLIB_EXTRACT_FLAG_SEQUENTIAL;
 636         }
 637
 638         if (image == WIM_ALL_IMAGES) {
 639                 extract_flags |= WIMLIB_EXTRACT_FLAG_MULTI_IMAGE;
 640                 ret = extract_all_images(w, output_dir, extract_flags);
 641         } else {
 642                 extract_flags &= ~WIMLIB_EXTRACT_FLAG_MULTI_IMAGE;
 643                 ret = extract_single_image(w, image, output_dir, extract_flags);
 644         }
 645         if (num_additional_swms) {
 646                 free_lookup_table(w->lookup_table);
 647                 w->lookup_table = w_tab_save;
 648         }
 649
 650         if (extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK |
 651                              WIMLIB_EXTRACT_FLAG_HARDLINK))
 652         {
 653                 for_lookup_table_entry(w->lookup_table,
 654                                        lte_free_extracted_file,
 655                                        NULL);
 656         }
 657         return ret;
 658
 659 }