wimlib.net Git - wimlib/blob - src/wim.c

   1 /*
   2  * wim.c - Stuff that doesn't fit into any other file
   3  */
   4
   5 /*
   6  * Copyright (C) 2012, 2013 Eric Biggers
   7  *
   8  * wimlib - Library for working with WIM files
   9  *
  10  * This file is part of wimlib, a library for working with WIM files.
  11  *
  12  * wimlib is free software; you can redistribute it and/or modify it under the
  13  * terms of the GNU General Public License as published by the Free
  14  * Software Foundation; either version 3 of the License, or (at your option)
  15  * any later version.
  16  *
  17  * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
  18  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  19  * A PARTICULAR PURPOSE. See the GNU General Public License for more
  20  * details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with wimlib; if not, see http://www.gnu.org/licenses/.
  24  */
  25
  26 #include "config.h"
  27
  28 #include <errno.h>
  29 #include <fcntl.h>
  30 #include <limits.h>
  31 #include <stdarg.h>
  32 #include <stdlib.h>
  33 #include <unistd.h>
  34
  35 #ifdef __WIN32__
  36 #  include "win32.h"
  37 #else
  38 #  include <langinfo.h>
  39 #endif
  40
  41 #include "buffer_io.h"
  42 #include "dentry.h"
  43 #include "lookup_table.h"
  44 #include "wimlib_internal.h"
  45 #include "xml.h"
  46
  47 static int
  48 image_print_metadata(WIMStruct *w)
  49 {
  50         DEBUG("Printing metadata for image %d", w->current_image);
  51         print_security_data(wim_security_data(w));
  52         return for_dentry_in_tree(wim_root_dentry(w), print_dentry,
  53                                   w->lookup_table);
  54 }
  55
  56
  57 static int
  58 image_print_files(WIMStruct *w)
  59 {
  60         return for_dentry_in_tree(wim_root_dentry(w), print_dentry_full_path,
  61                                   NULL);
  62 }
  63
  64 static WIMStruct *
  65 new_wim_struct()
  66 {
  67         WIMStruct *w = CALLOC(1, sizeof(WIMStruct));
  68 #ifdef WITH_FUSE
  69         if (pthread_mutex_init(&w->fp_tab_mutex, NULL) != 0) {
  70                 ERROR_WITH_ERRNO("Failed to initialize mutex");
  71                 FREE(w);
  72                 w = NULL;
  73         }
  74 #endif
  75         return w;
  76
  77 }
  78
  79 /*
  80  * Calls a function on images in the WIM.  If @image is WIMLIB_ALL_IMAGES, @visitor
  81  * is called on the WIM once for each image, with each image selected as the
  82  * current image in turn.  If @image is a certain image, @visitor is called on
  83  * the WIM only once, with that image selected.
  84  */
  85 int
  86 for_image(WIMStruct *w, int image, int (*visitor)(WIMStruct *))
  87 {
  88         int ret;
  89         int start;
  90         int end;
  91         int i;
  92
  93         if (image == WIMLIB_ALL_IMAGES) {
  94                 start = 1;
  95                 end = w->hdr.image_count;
  96         } else if (image >= 1 && image <= w->hdr.image_count) {
  97                 start = image;
  98                 end = image;
  99         } else {
 100                 return WIMLIB_ERR_INVALID_IMAGE;
 101         }
 102         for (i = start; i <= end; i++) {
 103                 ret = select_wim_image(w, i);
 104                 if (ret != 0)
 105                         return ret;
 106                 ret = visitor(w);
 107                 if (ret != 0)
 108                         return ret;
 109         }
 110         return 0;
 111 }
 112
 113 /* Returns the compression type given in the flags of a WIM header. */
 114 static int
 115 wim_hdr_flags_compression_type(int wim_hdr_flags)
 116 {
 117         if (wim_hdr_flags & WIM_HDR_FLAG_COMPRESSION) {
 118                 if (wim_hdr_flags & WIM_HDR_FLAG_COMPRESS_LZX)
 119                         return WIMLIB_COMPRESSION_TYPE_LZX;
 120                 else if (wim_hdr_flags & WIM_HDR_FLAG_COMPRESS_XPRESS)
 121                         return WIMLIB_COMPRESSION_TYPE_XPRESS;
 122                 else
 123                         return WIMLIB_COMPRESSION_TYPE_INVALID;
 124         } else {
 125                 return WIMLIB_COMPRESSION_TYPE_NONE;
 126         }
 127 }
 128
 129 /*
 130  * Creates a WIMStruct for a new WIM file.
 131  */
 132 WIMLIBAPI int
 133 wimlib_create_new_wim(int ctype, WIMStruct **w_ret)
 134 {
 135         WIMStruct *w;
 136         struct wim_lookup_table *table;
 137         int ret;
 138
 139         DEBUG("Creating new WIM with %"TS" compression.",
 140               wimlib_get_compression_type_string(ctype));
 141
 142         /* Allocate the WIMStruct. */
 143         w = new_wim_struct();
 144         if (!w)
 145                 return WIMLIB_ERR_NOMEM;
 146
 147         ret = init_header(&w->hdr, ctype);
 148         if (ret != 0)
 149                 goto out_free;
 150
 151         table = new_lookup_table(9001);
 152         if (!table) {
 153                 ret = WIMLIB_ERR_NOMEM;
 154                 goto out_free;
 155         }
 156         w->lookup_table = table;
 157         *w_ret = w;
 158         return 0;
 159 out_free:
 160         FREE(w);
 161         return ret;
 162 }
 163
 164 WIMLIBAPI int
 165 wimlib_get_num_images(const WIMStruct *w)
 166 {
 167         return w->hdr.image_count;
 168 }
 169
 170 int
 171 select_wim_image(WIMStruct *w, int image)
 172 {
 173         struct wim_image_metadata *imd;
 174         int ret;
 175
 176         DEBUG("Selecting image %d", image);
 177
 178         if (image == WIMLIB_NO_IMAGE) {
 179                 ERROR("Invalid image: %d", WIMLIB_NO_IMAGE);
 180                 return WIMLIB_ERR_INVALID_IMAGE;
 181         }
 182
 183         if (image == w->current_image)
 184                 return 0;
 185
 186         if (image < 1 || image > w->hdr.image_count) {
 187                 ERROR("Cannot select image %d: There are only %u images",
 188                       image, w->hdr.image_count);
 189                 return WIMLIB_ERR_INVALID_IMAGE;
 190         }
 191
 192         /* If a valid image is currently selected, it can be freed if it is not
 193          * modified.  */
 194         if (w->current_image != WIMLIB_NO_IMAGE) {
 195                 imd = wim_get_current_image_metadata(w);
 196                 if (!imd->modified) {
 197                         wimlib_assert(list_empty(&imd->unhashed_streams));
 198                         DEBUG("Freeing image %u", w->current_image);
 199                         destroy_image_metadata(imd, NULL, false);
 200                 }
 201         }
 202         w->current_image = image;
 203         imd = wim_get_current_image_metadata(w);
 204         if (imd->root_dentry) {
 205                 ret = 0;
 206         } else {
 207                 #ifdef ENABLE_DEBUG
 208                 DEBUG("Reading metadata resource specified by the following "
 209                       "lookup table entry:");
 210                 print_lookup_table_entry(imd->metadata_lte, stderr);
 211                 #endif
 212                 ret = read_metadata_resource(w, imd);
 213                 if (ret)
 214                         w->current_image = WIMLIB_NO_IMAGE;
 215         }
 216         return ret;
 217 }
 218
 219
 220 /* Returns the compression type of the WIM file. */
 221 WIMLIBAPI int
 222 wimlib_get_compression_type(const WIMStruct *w)
 223 {
 224         return wim_hdr_flags_compression_type(w->hdr.flags);
 225 }
 226
 227 WIMLIBAPI const tchar *
 228 wimlib_get_compression_type_string(int ctype)
 229 {
 230         switch (ctype) {
 231                 case WIMLIB_COMPRESSION_TYPE_NONE:
 232                         return T("None");
 233                 case WIMLIB_COMPRESSION_TYPE_LZX:
 234                         return T("LZX");
 235                 case WIMLIB_COMPRESSION_TYPE_XPRESS:
 236                         return T("XPRESS");
 237                 default:
 238                         return T("Invalid");
 239         }
 240 }
 241
 242 /*
 243  * Returns the number of an image in the WIM file, given a string that is either
 244  * the number of the image, or the name of the image.  The images are numbered
 245  * starting at 1.
 246  */
 247 WIMLIBAPI int
 248 wimlib_resolve_image(WIMStruct *w, const tchar *image_name_or_num)
 249 {
 250         tchar *p;
 251         long image;
 252         int i;
 253
 254         if (!image_name_or_num || !*image_name_or_num)
 255                 return WIMLIB_NO_IMAGE;
 256
 257         if (!tstrcasecmp(image_name_or_num, T("all"))
 258             || !tstrcasecmp(image_name_or_num, T("*")))
 259                 return WIMLIB_ALL_IMAGES;
 260         image = tstrtol(image_name_or_num, &p, 10);
 261         if (p != image_name_or_num && *p == T('\0') && image > 0) {
 262                 if (image > w->hdr.image_count)
 263                         return WIMLIB_NO_IMAGE;
 264                 return image;
 265         } else {
 266                 for (i = 1; i <= w->hdr.image_count; i++) {
 267                         if (!tstrcmp(image_name_or_num,
 268                                      wimlib_get_image_name(w, i)))
 269                                 return i;
 270                 }
 271                 return WIMLIB_NO_IMAGE;
 272         }
 273 }
 274
 275 /* Prints some basic information about a WIM file. */
 276 WIMLIBAPI void
 277 wimlib_print_wim_information(const WIMStruct *w)
 278 {
 279         const struct wim_header *hdr;
 280
 281         hdr = &w->hdr;
 282         tputs(T("WIM Information:"));
 283         tputs(T("----------------"));
 284         tprintf(T("Path:           %"TS"\n"), w->filename);
 285         tfputs(T("GUID:           0x"), stdout);
 286         print_byte_field(hdr->guid, WIM_GID_LEN, stdout);
 287         tputchar(T('\n'));
 288         tprintf(T("Image Count:    %d\n"), hdr->image_count);
 289         tprintf(T("Compression:    %"TS"\n"),
 290                 wimlib_get_compression_type_string(wimlib_get_compression_type(w)));
 291         tprintf(T("Part Number:    %d/%d\n"), hdr->part_number, hdr->total_parts);
 292         tprintf(T("Boot Index:     %d\n"), hdr->boot_idx);
 293         tprintf(T("Size:           %"PRIu64" bytes\n"),
 294                 wim_info_get_total_bytes(w->wim_info));
 295         tprintf(T("Integrity Info: %"TS"\n"),
 296                 (w->hdr.integrity.offset != 0) ? T("yes") : T("no"));
 297         tputchar(T('\n'));
 298 }
 299
 300 WIMLIBAPI bool
 301 wimlib_has_integrity_table(const WIMStruct *w)
 302 {
 303         return w->hdr.integrity.size != 0;
 304 }
 305
 306 WIMLIBAPI void
 307 wimlib_print_available_images(const WIMStruct *w, int image)
 308 {
 309         int first;
 310         int last;
 311         int i;
 312         int n;
 313         if (image == WIMLIB_ALL_IMAGES) {
 314                 n = tprintf(T("Available Images:\n"));
 315                 first = 1;
 316                 last = w->hdr.image_count;
 317         } else if (image >= 1 && image <= w->hdr.image_count) {
 318                 n = tprintf(T("Information for Image %d\n"), image);
 319                 first = image;
 320                 last = image;
 321         } else {
 322                 tprintf(T("wimlib_print_available_images(): Invalid image %d"),
 323                         image);
 324                 return;
 325         }
 326         for (i = 0; i < n - 1; i++)
 327                 tputchar(T('-'));
 328         tputchar(T('\n'));
 329         for (i = first; i <= last; i++)
 330                 print_image_info(w->wim_info, i);
 331 }
 332
 333
 334 /* Prints the metadata for the specified image, which may be WIMLIB_ALL_IMAGES, but
 335  * not WIMLIB_NO_IMAGE. */
 336 WIMLIBAPI int
 337 wimlib_print_metadata(WIMStruct *w, int image)
 338 {
 339         if (w->hdr.part_number != 1) {
 340                 ERROR("Cannot show the metadata from part %hu of a %hu-part split WIM!",
 341                        w->hdr.part_number, w->hdr.total_parts);
 342                 ERROR("Select the first part of the split WIM to see the metadata.");
 343                 return WIMLIB_ERR_SPLIT_UNSUPPORTED;
 344         }
 345         return for_image(w, image, image_print_metadata);
 346 }
 347
 348 WIMLIBAPI int
 349 wimlib_print_files(WIMStruct *w, int image)
 350 {
 351         if (w->hdr.part_number != 1) {
 352                 ERROR("Cannot list the files from part %hu of a %hu-part split WIM!",
 353                        w->hdr.part_number, w->hdr.total_parts);
 354                 ERROR("Select the first part of the split WIM if you'd like to list the files.");
 355                 return WIMLIB_ERR_SPLIT_UNSUPPORTED;
 356         }
 357         return for_image(w, image, image_print_files);
 358 }
 359
 360 /* Sets the index of the bootable image. */
 361 WIMLIBAPI int
 362 wimlib_set_boot_idx(WIMStruct *w, int boot_idx)
 363 {
 364         if (w->hdr.total_parts != 1) {
 365                 ERROR("Cannot modify the boot index of a split WIM!");
 366                 return WIMLIB_ERR_SPLIT_UNSUPPORTED;
 367         }
 368         if (boot_idx < 0 || boot_idx > w->hdr.image_count)
 369                 return WIMLIB_ERR_INVALID_IMAGE;
 370         w->hdr.boot_idx = boot_idx;
 371         return 0;
 372 }
 373
 374 WIMLIBAPI int
 375 wimlib_get_part_number(const WIMStruct *w, int *total_parts_ret)
 376 {
 377         if (total_parts_ret)
 378                 *total_parts_ret = w->hdr.total_parts;
 379         return w->hdr.part_number;
 380 }
 381
 382
 383 WIMLIBAPI int
 384 wimlib_get_boot_idx(const WIMStruct *w)
 385 {
 386         return w->hdr.boot_idx;
 387 }
 388
 389 /*
 390  * Begins the reading of a WIM file; opens the file and reads its header and
 391  * lookup table, and optionally checks the integrity.
 392  */
 393 static int
 394 begin_read(WIMStruct *w, const tchar *in_wim_path, int open_flags,
 395            wimlib_progress_func_t progress_func)
 396 {
 397         int ret;
 398         int xml_num_images;
 399
 400         DEBUG("Reading the WIM file `%"TS"'", in_wim_path);
 401
 402         w->fp = tfopen(in_wim_path, T("rb"));
 403         if (!w->fp) {
 404                 ERROR_WITH_ERRNO("Failed to open `%"TS"' for reading",
 405                                  in_wim_path);
 406                 return WIMLIB_ERR_OPEN;
 407         }
 408
 409         /* The absolute path to the WIM is requested so that wimlib_overwrite()
 410          * still works even if the process changes its working directory.  This
 411          * actually happens if a WIM is mounted read-write, since the FUSE
 412          * thread changes directory to "/", and it needs to be able to find the
 413          * WIM file again.
 414          *
 415          * This will break if the full path to the WIM changes in the
 416          * intervening time...
 417          *
 418          * Warning: in Windows native builds, realpath() calls the replacement
 419          * function in win32.c.
 420          */
 421         w->filename = realpath(in_wim_path, NULL);
 422         if (!w->filename) {
 423                 ERROR_WITH_ERRNO("Failed to resolve WIM filename");
 424                 if (errno == ENOMEM)
 425                         return WIMLIB_ERR_NOMEM;
 426                 else
 427                         return WIMLIB_ERR_OPEN;
 428         }
 429
 430         ret = read_header(w->fp, &w->hdr, open_flags);
 431         if (ret)
 432                 return ret;
 433
 434         DEBUG("According to header, WIM contains %u images", w->hdr.image_count);
 435
 436         /* If the boot index is invalid, print a warning and set it to 0 */
 437         if (w->hdr.boot_idx > w->hdr.image_count) {
 438                 WARNING("In `%"TS"', image %u is marked as bootable, "
 439                         "but there are only %u images in the WIM",
 440                         in_wim_path, w->hdr.boot_idx, w->hdr.image_count);
 441                 w->hdr.boot_idx = 0;
 442         }
 443
 444         if (wimlib_get_compression_type(w) == WIMLIB_COMPRESSION_TYPE_INVALID) {
 445                 ERROR("Invalid compression type (WIM header flags = 0x%x)",
 446                       w->hdr.flags);
 447                 return WIMLIB_ERR_INVALID_COMPRESSION_TYPE;
 448         }
 449
 450         if (open_flags & WIMLIB_OPEN_FLAG_CHECK_INTEGRITY) {
 451                 ret = check_wim_integrity(w, progress_func);
 452                 if (ret == WIM_INTEGRITY_NONEXISTENT) {
 453                         WARNING("No integrity information for `%"TS"'; skipping "
 454                                 "integrity check.", in_wim_path);
 455                 } else if (ret == WIM_INTEGRITY_NOT_OK) {
 456                         ERROR("WIM is not intact! (Failed integrity check)");
 457                         return WIMLIB_ERR_INTEGRITY;
 458                 } else if (ret != WIM_INTEGRITY_OK) {
 459                         return ret;
 460                 }
 461         }
 462
 463         if (w->hdr.image_count != 0 && w->hdr.part_number == 1) {
 464                 w->image_metadata = new_image_metadata_array(w->hdr.image_count);
 465                 if (!w->image_metadata)
 466                         return WIMLIB_ERR_NOMEM;
 467         }
 468
 469         ret = read_lookup_table(w);
 470         if (ret)
 471                 return ret;
 472
 473         ret = read_xml_data(w->fp, &w->hdr.xml_res_entry,
 474                             &w->xml_data, &w->wim_info);
 475         if (ret)
 476                 return ret;
 477
 478         xml_num_images = wim_info_get_num_images(w->wim_info);
 479         if (xml_num_images != w->hdr.image_count) {
 480                 ERROR("In the file `%"TS"', there are %u <IMAGE> elements "
 481                       "in the XML data,", in_wim_path, xml_num_images);
 482                 ERROR("but %u images in the WIM!  There must be exactly one "
 483                       "<IMAGE> element per image.", w->hdr.image_count);
 484                 return WIMLIB_ERR_IMAGE_COUNT;
 485         }
 486
 487         DEBUG("Done beginning read of WIM file `%"TS"'.", in_wim_path);
 488         return 0;
 489 }
 490
 491 /*
 492  * Opens a WIM file and creates a WIMStruct for it.
 493  */
 494 WIMLIBAPI int
 495 wimlib_open_wim(const tchar *wim_file, int open_flags,
 496                 WIMStruct **w_ret,
 497                 wimlib_progress_func_t progress_func)
 498 {
 499         WIMStruct *w;
 500         int ret;
 501
 502         if (!wim_file || !w_ret)
 503                 return WIMLIB_ERR_INVALID_PARAM;
 504
 505         w = new_wim_struct();
 506         if (!w)
 507                 return WIMLIB_ERR_NOMEM;
 508
 509         ret = begin_read(w, wim_file, open_flags, progress_func);
 510         if (ret == 0)
 511                 *w_ret = w;
 512         else
 513                 wimlib_free(w);
 514         return ret;
 515 }
 516
 517 void
 518 destroy_image_metadata(struct wim_image_metadata *imd,
 519                        struct wim_lookup_table *table,
 520                        bool free_metadata_lte)
 521 {
 522         free_dentry_tree(imd->root_dentry, table);
 523         imd->root_dentry = NULL;
 524         free_security_data(imd->security_data);
 525         imd->security_data = NULL;
 526
 527         if (free_metadata_lte) {
 528                 free_lookup_table_entry(imd->metadata_lte);
 529                 imd->metadata_lte = NULL;
 530         }
 531         if (!table) {
 532                 struct wim_lookup_table_entry *lte, *tmp;
 533                 list_for_each_entry_safe(lte, tmp, &imd->unhashed_streams, unhashed_list)
 534                         free_lookup_table_entry(lte);
 535         }
 536         INIT_LIST_HEAD(&imd->unhashed_streams);
 537         INIT_LIST_HEAD(&imd->inode_list);
 538 #ifdef WITH_NTFS_3G
 539         if (imd->ntfs_vol) {
 540                 do_ntfs_umount(imd->ntfs_vol);
 541                 imd->ntfs_vol = NULL;
 542         }
 543 #endif
 544 }
 545
 546 void
 547 put_image_metadata(struct wim_image_metadata *imd,
 548                    struct wim_lookup_table *table)
 549 {
 550         if (imd && --imd->refcnt == 0) {
 551                 destroy_image_metadata(imd, table, true);
 552                 FREE(imd);
 553         }
 554 }
 555
 556 /* Appends the specified image metadata structure to the array of image metadata
 557  * for a WIM, and increments the image count. */
 558 int
 559 append_image_metadata(WIMStruct *w, struct wim_image_metadata *imd)
 560 {
 561         struct wim_image_metadata **imd_array;
 562
 563         DEBUG("Reallocating image metadata array for image_count = %u",
 564               w->hdr.image_count + 1);
 565         imd_array = REALLOC(w->image_metadata,
 566                             sizeof(w->image_metadata[0]) * (w->hdr.image_count + 1));
 567
 568         if (!imd_array)
 569                 return WIMLIB_ERR_NOMEM;
 570         w->image_metadata = imd_array;
 571         imd_array[w->hdr.image_count++] = imd;
 572         return 0;
 573 }
 574
 575
 576 struct wim_image_metadata *
 577 new_image_metadata()
 578 {
 579         struct wim_image_metadata *imd;
 580
 581         imd = CALLOC(1, sizeof(*imd));
 582         if (imd) {
 583                 imd->refcnt = 1;
 584                 INIT_LIST_HEAD(&imd->inode_list);
 585                 INIT_LIST_HEAD(&imd->unhashed_streams);
 586                 DEBUG("Created new image metadata (refcnt=1)");
 587         } else {
 588                 ERROR_WITH_ERRNO("Failed to allocate new image metadata structure");
 589         }
 590         return imd;
 591 }
 592
 593 struct wim_image_metadata **
 594 new_image_metadata_array(unsigned num_images)
 595 {
 596         struct wim_image_metadata **imd_array;
 597
 598         DEBUG("Creating new image metadata array for %u images",
 599               num_images);
 600
 601         imd_array = CALLOC(num_images, sizeof(imd_array[0]));
 602
 603         if (!imd_array) {
 604                 ERROR("Failed to allocate memory for %u image metadata structures",
 605                       num_images);
 606                 return NULL;
 607         }
 608         for (unsigned i = 0; i < num_images; i++) {
 609                 imd_array[i] = new_image_metadata();
 610                 if (!imd_array[i]) {
 611                         for (unsigned j = 0; j < i; j++)
 612                                 put_image_metadata(imd_array[j], NULL);
 613                         FREE(imd_array);
 614                         return NULL;
 615                 }
 616         }
 617         return imd_array;
 618 }
 619
 620 /* Checksum all streams that are unhashed (other than the metadata streams),
 621  * merging them into the lookup table as needed.  This is a no-op unless the
 622  * library has previously used to add or mount an image using the same
 623  * WIMStruct. */
 624 int
 625 wim_checksum_unhashed_streams(WIMStruct *w)
 626 {
 627         int ret;
 628         for (int i = 0; i < w->hdr.image_count; i++) {
 629                 struct wim_lookup_table_entry *lte, *tmp;
 630                 list_for_each_entry_safe(lte, tmp,
 631                                          &w->image_metadata[i]->unhashed_streams,
 632                                          unhashed_list)
 633                 {
 634                         ret = hash_unhashed_stream(lte, w->lookup_table, NULL);
 635                         if (ret)
 636                                 return ret;
 637                 }
 638         }
 639         return 0;
 640 }
 641
 642 /* Frees the memory for the WIMStruct, including all internal memory; also
 643  * closes all files associated with the WIMStruct.  */
 644 WIMLIBAPI void
 645 wimlib_free(WIMStruct *w)
 646 {
 647         DEBUG("Freeing WIMStruct");
 648
 649         if (!w)
 650                 return;
 651         if (w->fp)
 652                 fclose(w->fp);
 653         if (w->out_fp)
 654                 fclose(w->out_fp);
 655
 656 #ifdef WITH_FUSE
 657         if (w->fp_tab) {
 658                 for (size_t i = 0; i < w->num_allocated_fps; i++)
 659                         if (w->fp_tab[i])
 660                                 fclose(w->fp_tab[i]);
 661                 FREE(w->fp_tab);
 662         }
 663         pthread_mutex_destroy(&w->fp_tab_mutex);
 664 #endif
 665
 666         free_lookup_table(w->lookup_table);
 667
 668         FREE(w->filename);
 669         FREE(w->xml_data);
 670         free_wim_info(w->wim_info);
 671         if (w->image_metadata) {
 672                 for (unsigned i = 0; i < w->hdr.image_count; i++)
 673                         put_image_metadata(w->image_metadata[i], NULL);
 674                 FREE(w->image_metadata);
 675         }
 676         FREE(w);
 677         DEBUG("Freed WIMStruct");
 678 }
 679
 680 static bool
 681 test_locale_ctype_utf8()
 682 {
 683 #ifdef __WIN32__
 684         return false;
 685 #else
 686         char *ctype = nl_langinfo(CODESET);
 687
 688         return (!strstr(ctype, "UTF-8") ||
 689                 !strstr(ctype, "UTF8") ||
 690                 !strstr(ctype, "utf8") ||
 691                 !strstr(ctype, "utf-8"));
 692 #endif
 693 }
 694
 695 /* Get global memory allocations out of the way,
 696  * single-threaded programs like 'imagex'. */
 697 WIMLIBAPI int
 698 wimlib_global_init()
 699 {
 700         libxml_global_init();
 701 #ifdef WITH_NTFS_3G
 702         libntfs3g_global_init();
 703 #endif
 704         wimlib_mbs_is_utf8 = test_locale_ctype_utf8();
 705 #ifdef __WIN32__
 706         win32_global_init();
 707 #endif
 708         return 0;
 709 }
 710
 711 /* Free global memory allocations.  Not strictly necessary if the process using
 712  * wimlib is just about to exit (as is the case for 'imagex'). */
 713 WIMLIBAPI void
 714 wimlib_global_cleanup()
 715 {
 716         libxml_global_cleanup();
 717         iconv_global_cleanup();
 718 #ifdef __WIN32__
 719         win32_global_cleanup();
 720 #endif
 721 }