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