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   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         w->in_fd = INVALID_FILEDES;
  69         w->out_fd = INVALID_FILEDES;
  70         w->current_image = WIMLIB_NO_IMAGE;
  71         return w;
  72 }
  73
  74 /*
  75  * Calls a function on images in the WIM.  If @image is WIMLIB_ALL_IMAGES, @visitor
  76  * is called on the WIM once for each image, with each image selected as the
  77  * current image in turn.  If @image is a certain image, @visitor is called on
  78  * the WIM only once, with that image selected.
  79  */
  80 int
  81 for_image(WIMStruct *w, int image, int (*visitor)(WIMStruct *))
  82 {
  83         int ret;
  84         int start;
  85         int end;
  86         int i;
  87
  88         if (image == WIMLIB_ALL_IMAGES) {
  89                 start = 1;
  90                 end = w->hdr.image_count;
  91         } else if (image >= 1 && image <= w->hdr.image_count) {
  92                 start = image;
  93                 end = image;
  94         } else {
  95                 return WIMLIB_ERR_INVALID_IMAGE;
  96         }
  97         for (i = start; i <= end; i++) {
  98                 ret = select_wim_image(w, i);
  99                 if (ret != 0)
 100                         return ret;
 101                 ret = visitor(w);
 102                 if (ret != 0)
 103                         return ret;
 104         }
 105         return 0;
 106 }
 107
 108 /* Returns the compression type given in the flags of a WIM header. */
 109 static int
 110 wim_hdr_flags_compression_type(int wim_hdr_flags)
 111 {
 112         if (wim_hdr_flags & WIM_HDR_FLAG_COMPRESSION) {
 113                 if (wim_hdr_flags & WIM_HDR_FLAG_COMPRESS_LZX)
 114                         return WIMLIB_COMPRESSION_TYPE_LZX;
 115                 else if (wim_hdr_flags & WIM_HDR_FLAG_COMPRESS_XPRESS)
 116                         return WIMLIB_COMPRESSION_TYPE_XPRESS;
 117                 else
 118                         return WIMLIB_COMPRESSION_TYPE_INVALID;
 119         } else {
 120                 return WIMLIB_COMPRESSION_TYPE_NONE;
 121         }
 122 }
 123
 124 /*
 125  * Creates a WIMStruct for a new WIM file.
 126  */
 127 WIMLIBAPI int
 128 wimlib_create_new_wim(int ctype, WIMStruct **w_ret)
 129 {
 130         WIMStruct *w;
 131         struct wim_lookup_table *table;
 132         int ret;
 133
 134         DEBUG("Creating new WIM with %"TS" compression.",
 135               wimlib_get_compression_type_string(ctype));
 136
 137         /* Allocate the WIMStruct. */
 138         w = new_wim_struct();
 139         if (!w)
 140                 return WIMLIB_ERR_NOMEM;
 141
 142         ret = init_header(&w->hdr, ctype);
 143         if (ret != 0)
 144                 goto out_free;
 145
 146         table = new_lookup_table(9001);
 147         if (!table) {
 148                 ret = WIMLIB_ERR_NOMEM;
 149                 goto out_free;
 150         }
 151         w->lookup_table = table;
 152         *w_ret = w;
 153         return 0;
 154 out_free:
 155         FREE(w);
 156         return ret;
 157 }
 158
 159 WIMLIBAPI int
 160 wimlib_get_num_images(const WIMStruct *w)
 161 {
 162         return w->hdr.image_count;
 163 }
 164
 165 int
 166 select_wim_image(WIMStruct *w, int image)
 167 {
 168         struct wim_image_metadata *imd;
 169         int ret;
 170
 171         DEBUG("Selecting image %d", image);
 172
 173         if (image == WIMLIB_NO_IMAGE) {
 174                 ERROR("Invalid image: %d", WIMLIB_NO_IMAGE);
 175                 return WIMLIB_ERR_INVALID_IMAGE;
 176         }
 177
 178         if (image == w->current_image)
 179                 return 0;
 180
 181         if (image < 1 || image > w->hdr.image_count) {
 182                 ERROR("Cannot select image %d: There are only %u images",
 183                       image, w->hdr.image_count);
 184                 return WIMLIB_ERR_INVALID_IMAGE;
 185         }
 186
 187         /* If a valid image is currently selected, it can be freed if it is not
 188          * modified.  */
 189         if (w->current_image != WIMLIB_NO_IMAGE) {
 190                 imd = wim_get_current_image_metadata(w);
 191                 if (!imd->modified) {
 192                         wimlib_assert(list_empty(&imd->unhashed_streams));
 193                         DEBUG("Freeing image %u", w->current_image);
 194                         destroy_image_metadata(imd, NULL, false);
 195                 }
 196         }
 197         w->current_image = image;
 198         imd = wim_get_current_image_metadata(w);
 199         if (imd->root_dentry) {
 200                 ret = 0;
 201         } else {
 202                 #ifdef ENABLE_DEBUG
 203                 DEBUG("Reading metadata resource specified by the following "
 204                       "lookup table entry:");
 205                 print_lookup_table_entry(imd->metadata_lte, stderr);
 206                 #endif
 207                 ret = read_metadata_resource(w, imd);
 208                 if (ret)
 209                         w->current_image = WIMLIB_NO_IMAGE;
 210         }
 211         return ret;
 212 }
 213
 214
 215 /* Returns the compression type of the WIM file. */
 216 WIMLIBAPI int
 217 wimlib_get_compression_type(const WIMStruct *w)
 218 {
 219         return wim_hdr_flags_compression_type(w->hdr.flags);
 220 }
 221
 222 WIMLIBAPI const tchar *
 223 wimlib_get_compression_type_string(int ctype)
 224 {
 225         switch (ctype) {
 226                 case WIMLIB_COMPRESSION_TYPE_NONE:
 227                         return T("None");
 228                 case WIMLIB_COMPRESSION_TYPE_LZX:
 229                         return T("LZX");
 230                 case WIMLIB_COMPRESSION_TYPE_XPRESS:
 231                         return T("XPRESS");
 232                 default:
 233                         return T("Invalid");
 234         }
 235 }
 236
 237 /*
 238  * Returns the number of an image in the WIM file, given a string that is either
 239  * the number of the image, or the name of the image.  The images are numbered
 240  * starting at 1.
 241  */
 242 WIMLIBAPI int
 243 wimlib_resolve_image(WIMStruct *w, const tchar *image_name_or_num)
 244 {
 245         tchar *p;
 246         long image;
 247         int i;
 248
 249         if (!image_name_or_num || !*image_name_or_num)
 250                 return WIMLIB_NO_IMAGE;
 251
 252         if (!tstrcasecmp(image_name_or_num, T("all"))
 253             || !tstrcasecmp(image_name_or_num, T("*")))
 254                 return WIMLIB_ALL_IMAGES;
 255         image = tstrtol(image_name_or_num, &p, 10);
 256         if (p != image_name_or_num && *p == T('\0') && image > 0) {
 257                 if (image > w->hdr.image_count)
 258                         return WIMLIB_NO_IMAGE;
 259                 return image;
 260         } else {
 261                 for (i = 1; i <= w->hdr.image_count; i++) {
 262                         if (!tstrcmp(image_name_or_num,
 263                                      wimlib_get_image_name(w, i)))
 264                                 return i;
 265                 }
 266                 return WIMLIB_NO_IMAGE;
 267         }
 268 }
 269
 270 /* Prints some basic information about a WIM file. */
 271 WIMLIBAPI void
 272 wimlib_print_wim_information(const WIMStruct *w)
 273 {
 274         const struct wim_header *hdr;
 275
 276         hdr = &w->hdr;
 277         tputs(T("WIM Information:"));
 278         tputs(T("----------------"));
 279         tprintf(T("Path:           %"TS"\n"), w->filename);
 280         tfputs(T("GUID:           0x"), stdout);
 281         print_byte_field(hdr->guid, WIM_GID_LEN, stdout);
 282         tputchar(T('\n'));
 283         tprintf(T("Image Count:    %d\n"), hdr->image_count);
 284         tprintf(T("Compression:    %"TS"\n"),
 285                 wimlib_get_compression_type_string(wimlib_get_compression_type(w)));
 286         tprintf(T("Part Number:    %d/%d\n"), hdr->part_number, hdr->total_parts);
 287         tprintf(T("Boot Index:     %d\n"), hdr->boot_idx);
 288         tprintf(T("Size:           %"PRIu64" bytes\n"),
 289                 wim_info_get_total_bytes(w->wim_info));
 290         tprintf(T("Integrity Info: %"TS"\n"),
 291                 (w->hdr.integrity.offset != 0) ? T("yes") : T("no"));
 292         tprintf(T("Relative path junction: %"TS"\n"),
 293                 (hdr->flags & WIM_HDR_FLAG_RP_FIX) ? T("yes") : T("no"));
 294         tputchar(T('\n'));
 295 }
 296
 297 WIMLIBAPI bool
 298 wimlib_has_integrity_table(const WIMStruct *w)
 299 {
 300         return w->hdr.integrity.size != 0;
 301 }
 302
 303 WIMLIBAPI void
 304 wimlib_print_available_images(const WIMStruct *w, int image)
 305 {
 306         int first;
 307         int last;
 308         int i;
 309         int n;
 310         if (image == WIMLIB_ALL_IMAGES) {
 311                 n = tprintf(T("Available Images:\n"));
 312                 first = 1;
 313                 last = w->hdr.image_count;
 314         } else if (image >= 1 && image <= w->hdr.image_count) {
 315                 n = tprintf(T("Information for Image %d\n"), image);
 316                 first = image;
 317                 last = image;
 318         } else {
 319                 tprintf(T("wimlib_print_available_images(): Invalid image %d"),
 320                         image);
 321                 return;
 322         }
 323         for (i = 0; i < n - 1; i++)
 324                 tputchar(T('-'));
 325         tputchar(T('\n'));
 326         for (i = first; i <= last; i++)
 327                 print_image_info(w->wim_info, i);
 328 }
 329
 330
 331 /* Prints the metadata for the specified image, which may be WIMLIB_ALL_IMAGES, but
 332  * not WIMLIB_NO_IMAGE. */
 333 WIMLIBAPI int
 334 wimlib_print_metadata(WIMStruct *w, int image)
 335 {
 336         if (w->hdr.part_number != 1) {
 337                 ERROR("Cannot show the metadata from part %hu of a %hu-part split WIM!",
 338                        w->hdr.part_number, w->hdr.total_parts);
 339                 ERROR("Select the first part of the split WIM to see the metadata.");
 340                 return WIMLIB_ERR_SPLIT_UNSUPPORTED;
 341         }
 342         return for_image(w, image, image_print_metadata);
 343 }
 344
 345 WIMLIBAPI int
 346 wimlib_print_files(WIMStruct *w, int image)
 347 {
 348         if (w->hdr.part_number != 1) {
 349                 ERROR("Cannot list the files from part %hu of a %hu-part split WIM!",
 350                        w->hdr.part_number, w->hdr.total_parts);
 351                 ERROR("Select the first part of the split WIM if you'd like to list the files.");
 352                 return WIMLIB_ERR_SPLIT_UNSUPPORTED;
 353         }
 354         return for_image(w, image, image_print_files);
 355 }
 356
 357 /* Sets the index of the bootable image. */
 358 WIMLIBAPI int
 359 wimlib_set_boot_idx(WIMStruct *w, int boot_idx)
 360 {
 361         if (w->hdr.total_parts != 1) {
 362                 ERROR("Cannot modify the boot index of a split WIM!");
 363                 return WIMLIB_ERR_SPLIT_UNSUPPORTED;
 364         }
 365         if (boot_idx < 0 || boot_idx > w->hdr.image_count)
 366                 return WIMLIB_ERR_INVALID_IMAGE;
 367         w->hdr.boot_idx = boot_idx;
 368         return 0;
 369 }
 370
 371 WIMLIBAPI int
 372 wimlib_get_part_number(const WIMStruct *w, int *total_parts_ret)
 373 {
 374         if (total_parts_ret)
 375                 *total_parts_ret = w->hdr.total_parts;
 376         return w->hdr.part_number;
 377 }
 378
 379
 380 WIMLIBAPI int
 381 wimlib_get_boot_idx(const WIMStruct *w)
 382 {
 383         return w->hdr.boot_idx;
 384 }
 385
 386 static int
 387 do_open_wim(const tchar *filename, filedes_t *fd_ret)
 388 {
 389         int fd;
 390
 391         fd = open(filename, O_RDONLY);
 392         if (fd == -1) {
 393                 ERROR_WITH_ERRNO("Can't open \"%"TS"\" read-only", filename);
 394                 return WIMLIB_ERR_OPEN;
 395         }
 396         *fd_ret = fd;
 397         return 0;
 398 }
 399
 400 int
 401 reopen_wim(WIMStruct *w)
 402 {
 403         wimlib_assert(w->in_fd == INVALID_FILEDES);
 404         return do_open_wim(w->filename, &w->in_fd);
 405 }
 406
 407 int
 408 close_wim(WIMStruct *w)
 409 {
 410         close(w->in_fd);
 411         w->in_fd = INVALID_FILEDES;
 412         return 0;
 413 }
 414
 415 /*
 416  * Begins the reading of a WIM file; opens the file and reads its header and
 417  * lookup table, and optionally checks the integrity.
 418  */
 419 static int
 420 begin_read(WIMStruct *w, const tchar *in_wim_path, int open_flags,
 421            wimlib_progress_func_t progress_func)
 422 {
 423         int ret;
 424         int xml_num_images;
 425
 426         DEBUG("Reading the WIM file `%"TS"'", in_wim_path);
 427
 428         ret = do_open_wim(in_wim_path, &w->in_fd);
 429         if (ret)
 430                 return ret;
 431
 432         /* The absolute path to the WIM is requested so that wimlib_overwrite()
 433          * still works even if the process changes its working directory.  This
 434          * actually happens if a WIM is mounted read-write, since the FUSE
 435          * thread changes directory to "/", and it needs to be able to find the
 436          * WIM file again.
 437          *
 438          * This will break if the full path to the WIM changes in the
 439          * intervening time...
 440          *
 441          * Warning: in Windows native builds, realpath() calls the replacement
 442          * function in win32.c.
 443          */
 444         w->filename = realpath(in_wim_path, NULL);
 445         if (!w->filename) {
 446                 ERROR_WITH_ERRNO("Failed to resolve WIM filename");
 447                 if (errno == ENOMEM)
 448                         return WIMLIB_ERR_NOMEM;
 449                 else
 450                         return WIMLIB_ERR_OPEN;
 451         }
 452
 453         ret = read_header(w->in_fd, &w->hdr, open_flags);
 454         if (ret)
 455                 return ret;
 456
 457         DEBUG("According to header, WIM contains %u images", w->hdr.image_count);
 458
 459         /* If the boot index is invalid, print a warning and set it to 0 */
 460         if (w->hdr.boot_idx > w->hdr.image_count) {
 461                 WARNING("In `%"TS"', image %u is marked as bootable, "
 462                         "but there are only %u images in the WIM",
 463                         in_wim_path, w->hdr.boot_idx, w->hdr.image_count);
 464                 w->hdr.boot_idx = 0;
 465         }
 466
 467         if (wimlib_get_compression_type(w) == WIMLIB_COMPRESSION_TYPE_INVALID) {
 468                 ERROR("Invalid compression type (WIM header flags = 0x%x)",
 469                       w->hdr.flags);
 470                 return WIMLIB_ERR_INVALID_COMPRESSION_TYPE;
 471         }
 472
 473         if (open_flags & WIMLIB_OPEN_FLAG_CHECK_INTEGRITY) {
 474                 ret = check_wim_integrity(w, progress_func);
 475                 if (ret == WIM_INTEGRITY_NONEXISTENT) {
 476                         WARNING("No integrity information for `%"TS"'; skipping "
 477                                 "integrity check.", in_wim_path);
 478                 } else if (ret == WIM_INTEGRITY_NOT_OK) {
 479                         ERROR("WIM is not intact! (Failed integrity check)");
 480                         return WIMLIB_ERR_INTEGRITY;
 481                 } else if (ret != WIM_INTEGRITY_OK) {
 482                         return ret;
 483                 }
 484         }
 485
 486         if (w->hdr.image_count != 0 && w->hdr.part_number == 1) {
 487                 w->image_metadata = new_image_metadata_array(w->hdr.image_count);
 488                 if (!w->image_metadata)
 489                         return WIMLIB_ERR_NOMEM;
 490         }
 491
 492         ret = read_lookup_table(w);
 493         if (ret)
 494                 return ret;
 495
 496         ret = read_xml_data(w->in_fd, &w->hdr.xml_res_entry, &w->wim_info);
 497         if (ret)
 498                 return ret;
 499
 500         xml_num_images = wim_info_get_num_images(w->wim_info);
 501         if (xml_num_images != w->hdr.image_count) {
 502                 ERROR("In the file `%"TS"', there are %u <IMAGE> elements "
 503                       "in the XML data,", in_wim_path, xml_num_images);
 504                 ERROR("but %u images in the WIM!  There must be exactly one "
 505                       "<IMAGE> element per image.", w->hdr.image_count);
 506                 return WIMLIB_ERR_IMAGE_COUNT;
 507         }
 508
 509         DEBUG("Done beginning read of WIM file `%"TS"'.", in_wim_path);
 510         return 0;
 511 }
 512
 513 /*
 514  * Opens a WIM file and creates a WIMStruct for it.
 515  */
 516 WIMLIBAPI int
 517 wimlib_open_wim(const tchar *wim_file, int open_flags,
 518                 WIMStruct **w_ret,
 519                 wimlib_progress_func_t progress_func)
 520 {
 521         WIMStruct *w;
 522         int ret;
 523
 524         if (!wim_file || !w_ret)
 525                 return WIMLIB_ERR_INVALID_PARAM;
 526
 527         w = new_wim_struct();
 528         if (!w)
 529                 return WIMLIB_ERR_NOMEM;
 530
 531         ret = begin_read(w, wim_file, open_flags, progress_func);
 532         if (ret == 0)
 533                 *w_ret = w;
 534         else
 535                 wimlib_free(w);
 536         return ret;
 537 }
 538
 539 void
 540 destroy_image_metadata(struct wim_image_metadata *imd,
 541                        struct wim_lookup_table *table,
 542                        bool free_metadata_lte)
 543 {
 544         free_dentry_tree(imd->root_dentry, table);
 545         imd->root_dentry = NULL;
 546         free_security_data(imd->security_data);
 547         imd->security_data = NULL;
 548
 549         if (free_metadata_lte) {
 550                 free_lookup_table_entry(imd->metadata_lte);
 551                 imd->metadata_lte = NULL;
 552         }
 553         if (!table) {
 554                 struct wim_lookup_table_entry *lte, *tmp;
 555                 list_for_each_entry_safe(lte, tmp, &imd->unhashed_streams, unhashed_list)
 556                         free_lookup_table_entry(lte);
 557         }
 558         INIT_LIST_HEAD(&imd->unhashed_streams);
 559         INIT_LIST_HEAD(&imd->inode_list);
 560 #ifdef WITH_NTFS_3G
 561         if (imd->ntfs_vol) {
 562                 do_ntfs_umount(imd->ntfs_vol);
 563                 imd->ntfs_vol = NULL;
 564         }
 565 #endif
 566 }
 567
 568 void
 569 put_image_metadata(struct wim_image_metadata *imd,
 570                    struct wim_lookup_table *table)
 571 {
 572         if (imd && --imd->refcnt == 0) {
 573                 destroy_image_metadata(imd, table, true);
 574                 FREE(imd);
 575         }
 576 }
 577
 578 /* Appends the specified image metadata structure to the array of image metadata
 579  * for a WIM, and increments the image count. */
 580 int
 581 append_image_metadata(WIMStruct *w, struct wim_image_metadata *imd)
 582 {
 583         struct wim_image_metadata **imd_array;
 584
 585         DEBUG("Reallocating image metadata array for image_count = %u",
 586               w->hdr.image_count + 1);
 587         imd_array = REALLOC(w->image_metadata,
 588                             sizeof(w->image_metadata[0]) * (w->hdr.image_count + 1));
 589
 590         if (!imd_array)
 591                 return WIMLIB_ERR_NOMEM;
 592         w->image_metadata = imd_array;
 593         imd_array[w->hdr.image_count++] = imd;
 594         return 0;
 595 }
 596
 597
 598 struct wim_image_metadata *
 599 new_image_metadata()
 600 {
 601         struct wim_image_metadata *imd;
 602
 603         imd = CALLOC(1, sizeof(*imd));
 604         if (imd) {
 605                 imd->refcnt = 1;
 606                 INIT_LIST_HEAD(&imd->inode_list);
 607                 INIT_LIST_HEAD(&imd->unhashed_streams);
 608                 DEBUG("Created new image metadata (refcnt=1)");
 609         } else {
 610                 ERROR_WITH_ERRNO("Failed to allocate new image metadata structure");
 611         }
 612         return imd;
 613 }
 614
 615 struct wim_image_metadata **
 616 new_image_metadata_array(unsigned num_images)
 617 {
 618         struct wim_image_metadata **imd_array;
 619
 620         DEBUG("Creating new image metadata array for %u images",
 621               num_images);
 622
 623         imd_array = CALLOC(num_images, sizeof(imd_array[0]));
 624
 625         if (!imd_array) {
 626                 ERROR("Failed to allocate memory for %u image metadata structures",
 627                       num_images);
 628                 return NULL;
 629         }
 630         for (unsigned i = 0; i < num_images; i++) {
 631                 imd_array[i] = new_image_metadata();
 632                 if (!imd_array[i]) {
 633                         for (unsigned j = 0; j < i; j++)
 634                                 put_image_metadata(imd_array[j], NULL);
 635                         FREE(imd_array);
 636                         return NULL;
 637                 }
 638         }
 639         return imd_array;
 640 }
 641
 642 /* Checksum all streams that are unhashed (other than the metadata streams),
 643  * merging them into the lookup table as needed.  This is a no-op unless the
 644  * library has previously used to add or mount an image using the same
 645  * WIMStruct. */
 646 int
 647 wim_checksum_unhashed_streams(WIMStruct *w)
 648 {
 649         int ret;
 650         for (int i = 0; i < w->hdr.image_count; i++) {
 651                 struct wim_lookup_table_entry *lte, *tmp;
 652                 struct wim_image_metadata *imd = w->image_metadata[i];
 653                 image_for_each_unhashed_stream_safe(lte, tmp, imd) {
 654                         ret = hash_unhashed_stream(lte, w->lookup_table, NULL);
 655                         if (ret)
 656                                 return ret;
 657                 }
 658         }
 659         return 0;
 660 }
 661
 662 /* Frees the memory for the WIMStruct, including all internal memory; also
 663  * closes all files associated with the WIMStruct.  */
 664 WIMLIBAPI void
 665 wimlib_free(WIMStruct *w)
 666 {
 667         DEBUG("Freeing WIMStruct");
 668
 669         if (!w)
 670                 return;
 671         if (w->in_fd != INVALID_FILEDES)
 672                 close(w->in_fd);
 673         if (w->out_fd != INVALID_FILEDES)
 674                 close(w->out_fd);
 675
 676         free_lookup_table(w->lookup_table);
 677
 678         FREE(w->filename);
 679         free_wim_info(w->wim_info);
 680         if (w->image_metadata) {
 681                 for (unsigned i = 0; i < w->hdr.image_count; i++)
 682                         put_image_metadata(w->image_metadata[i], NULL);
 683                 FREE(w->image_metadata);
 684         }
 685         FREE(w);
 686         DEBUG("Freed WIMStruct");
 687 }
 688
 689 static bool
 690 test_locale_ctype_utf8()
 691 {
 692 #ifdef __WIN32__
 693         return false;
 694 #else
 695         char *ctype = nl_langinfo(CODESET);
 696
 697         return (!strstr(ctype, "UTF-8") ||
 698                 !strstr(ctype, "UTF8") ||
 699                 !strstr(ctype, "utf8") ||
 700                 !strstr(ctype, "utf-8"));
 701 #endif
 702 }
 703
 704 WIMLIBAPI int
 705 wimlib_global_init(int init_flags)
 706 {
 707         libxml_global_init();
 708         if (!(init_flags & WIMLIB_INIT_FLAG_ASSUME_UTF8)) {
 709                 wimlib_mbs_is_utf8 = test_locale_ctype_utf8();
 710         #ifdef WITH_NTFS_3G
 711                 if (!wimlib_mbs_is_utf8)
 712                         libntfs3g_global_init();
 713         #endif
 714         }
 715 #ifdef __WIN32__
 716         win32_global_init();
 717 #endif
 718         return 0;
 719 }
 720
 721 /* Free global memory allocations.  Not strictly necessary if the process using
 722  * wimlib is just about to exit (as is the case for 'imagex'). */
 723 WIMLIBAPI void
 724 wimlib_global_cleanup()
 725 {
 726         libxml_global_cleanup();
 727         iconv_global_cleanup();
 728 #ifdef __WIN32__
 729         win32_global_cleanup();
 730 #endif
 731 }