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

   1 /*
   2  * add_image.c
   3  */
   4
   5 /*
   6  * Copyright (C) 2012 Eric Biggers
   7  *
   8  * This file is part of wimlib, a library for working with WIM files.
   9  *
  10  * wimlib is free software; you can redistribute it and/or modify it under the
  11  * terms of the GNU General Public License as published by the Free
  12  * Software Foundation; either version 3 of the License, or (at your option)
  13  * any later version.
  14  *
  15  * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
  16  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  17  * A PARTICULAR PURPOSE. See the GNU General Public License for more
  18  * details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with wimlib; if not, see http://www.gnu.org/licenses/.
  22  */
  23
  24 #include "wimlib_internal.h"
  25 #include "dentry.h"
  26 #include "timestamp.h"
  27 #include "lookup_table.h"
  28 #include "xml.h"
  29 #include <string.h>
  30 #include <fnmatch.h>
  31 #include <ctype.h>
  32 #include <sys/stat.h>
  33 #include <dirent.h>
  34 #include <errno.h>
  35 #include <unistd.h>
  36
  37 /** Private flag: Used to mark that we currently adding the root directory of
  38  * the WIM image. */
  39 #define WIMLIB_ADD_IMAGE_FLAG_ROOT 0x80000000
  40
  41 /*
  42  * Adds an image (given by its dentry tree) to the image metadata array of a WIM
  43  * file, adds an entry to the lookup table for the image metadata, updates the
  44  * image count in the header, and selects the new image.
  45  *
  46  * Does not update the XML data.
  47  *
  48  * On failure, WIMLIB_ERR_NOMEM is returned and no changes are made.  Otherwise,
  49  * 0 is returned and the image metadata array of @w is modified.
  50  *
  51  * @w:            The WIMStruct for the WIM file.
  52  * @root_dentry:  The root of the directory tree for the image.
  53  * @sd:           The security data for the image.
  54  */
  55 int add_new_dentry_tree(WIMStruct *w, struct dentry *root_dentry,
  56                         struct wim_security_data *sd)
  57 {
  58         struct lookup_table_entry *metadata_lte;
  59         struct image_metadata *imd;
  60         struct image_metadata *new_imd;
  61
  62         wimlib_assert(root_dentry != NULL);
  63
  64         DEBUG("Reallocating image metadata array for image_count = %u",
  65               w->hdr.image_count + 1);
  66         imd = CALLOC((w->hdr.image_count + 1), sizeof(struct image_metadata));
  67
  68         if (!imd) {
  69                 ERROR("Failed to allocate memory for new image metadata array");
  70                 goto err;
  71         }
  72
  73         memcpy(imd, w->image_metadata,
  74                w->hdr.image_count * sizeof(struct image_metadata));
  75
  76         metadata_lte = new_lookup_table_entry();
  77         if (!metadata_lte)
  78                 goto err_free_imd;
  79
  80         metadata_lte->resource_entry.flags = WIM_RESHDR_FLAG_METADATA;
  81         random_hash(metadata_lte->hash);
  82         lookup_table_insert(w->lookup_table, metadata_lte);
  83
  84         new_imd = &imd[w->hdr.image_count];
  85
  86         new_imd->root_dentry    = root_dentry;
  87         new_imd->metadata_lte   = metadata_lte;
  88         new_imd->security_data  = sd;
  89         new_imd->modified       = 1;
  90
  91         FREE(w->image_metadata);
  92         w->image_metadata = imd;
  93         w->hdr.image_count++;
  94         return 0;
  95 err_free_imd:
  96         FREE(imd);
  97 err:
  98         return WIMLIB_ERR_NOMEM;
  99
 100 }
 101
 102
 103 /*
 104  * Recursively builds a dentry tree from a directory tree on disk, outside the
 105  * WIM file.
 106  *
 107  * @root_ret:   Place to return a pointer to the root of the dentry tree.  Only
 108  *              modified if successful.  NULL if the file or directory was
 109  *              excluded from capture.
 110  *
 111  * @root_disk_path:  The path to the root of the directory tree on disk.
 112  *
 113  * @lookup_table: The lookup table for the WIM file.  For each file added to the
 114  *              dentry tree being built, an entry is added to the lookup table,
 115  *              unless an identical stream is already in the lookup table.
 116  *              These lookup table entries that are added point to the path of
 117  *              the file on disk.
 118  *
 119  * @sd:         Ignored.  (Security data only captured in NTFS mode.)
 120  *
 121  * @capture_config:
 122  *              Configuration for files to be excluded from capture.
 123  *
 124  * @add_flags:  Bitwise or of WIMLIB_ADD_IMAGE_FLAG_*
 125  *
 126  * @extra_arg:  Ignored. (Only used in NTFS mode.)
 127  *
 128  * @return:     0 on success, nonzero on failure.  It is a failure if any of
 129  *              the files cannot be `stat'ed, or if any of the needed
 130  *              directories cannot be opened or read.  Failure to add the files
 131  *              to the WIM may still occur later when trying to actually read
 132  *              the on-disk files during a call to wimlib_write() or
 133  *              wimlib_overwrite().
 134  */
 135 static int build_dentry_tree(struct dentry **root_ret,
 136                              const char *root_disk_path,
 137                              struct lookup_table *lookup_table,
 138                              struct wim_security_data *sd,
 139                              const struct capture_config *config,
 140                              int add_image_flags,
 141                              wimlib_progress_func_t progress_func,
 142                              void *extra_arg)
 143 {
 144         struct stat root_stbuf;
 145         int ret = 0;
 146         int (*stat_fn)(const char *restrict, struct stat *restrict);
 147         struct dentry *root;
 148         const char *filename;
 149         struct inode *inode;
 150
 151         if (exclude_path(root_disk_path, config, true)) {
 152                 if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_ROOT) {
 153                         ERROR("Cannot exclude the root directory from capture");
 154                         return WIMLIB_ERR_INVALID_CAPTURE_CONFIG;
 155                 }
 156                 if ((add_image_flags & WIMLIB_ADD_IMAGE_FLAG_VERBOSE)
 157                     && progress_func)
 158                 {
 159                         union wimlib_progress_info info;
 160                         info.scan.cur_path = root_disk_path;
 161                         info.scan.excluded = true;
 162                         progress_func(WIMLIB_PROGRESS_MSG_SCAN_DENTRY, &info);
 163                 }
 164                 *root_ret = NULL;
 165                 return 0;
 166         }
 167
 168         if ((add_image_flags & WIMLIB_ADD_IMAGE_FLAG_VERBOSE)
 169             && progress_func)
 170         {
 171                 union wimlib_progress_info info;
 172                 info.scan.cur_path = root_disk_path;
 173                 info.scan.excluded = false;
 174                 progress_func(WIMLIB_PROGRESS_MSG_SCAN_DENTRY, &info);
 175         }
 176
 177         if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_DEREFERENCE)
 178                 stat_fn = stat;
 179         else
 180                 stat_fn = lstat;
 181
 182         ret = (*stat_fn)(root_disk_path, &root_stbuf);
 183         if (ret != 0) {
 184                 ERROR_WITH_ERRNO("Failed to stat `%s'", root_disk_path);
 185                 return WIMLIB_ERR_STAT;
 186         }
 187
 188         if ((add_image_flags & WIMLIB_ADD_IMAGE_FLAG_ROOT) &&
 189               !S_ISDIR(root_stbuf.st_mode))
 190         {
 191                 /* Do a dereference-stat in case the root is a symbolic link.
 192                  * This case is allowed, provided that the symbolic link points
 193                  * to a directory. */
 194                 ret = stat(root_disk_path, &root_stbuf);
 195                 if (ret != 0) {
 196                         ERROR_WITH_ERRNO("Failed to stat `%s'", root_disk_path);
 197                         return WIMLIB_ERR_STAT;
 198                 }
 199                 if (!S_ISDIR(root_stbuf.st_mode)) {
 200                         ERROR("`%s' is not a directory", root_disk_path);
 201                         return WIMLIB_ERR_NOTDIR;
 202                 }
 203         }
 204         if (!S_ISREG(root_stbuf.st_mode) && !S_ISDIR(root_stbuf.st_mode)
 205             && !S_ISLNK(root_stbuf.st_mode)) {
 206                 ERROR("`%s' is not a regular file, directory, or symbolic link.",
 207                       root_disk_path);
 208                 return WIMLIB_ERR_SPECIAL_FILE;
 209         }
 210
 211         if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_ROOT)
 212                 filename = "";
 213         else
 214                 filename = path_basename(root_disk_path);
 215
 216         root = new_dentry_with_timeless_inode(filename);
 217         if (!root)
 218                 return WIMLIB_ERR_NOMEM;
 219
 220         inode = root->d_inode;
 221
 222 #ifdef HAVE_STAT_NANOSECOND_PRECISION
 223         inode->creation_time = timespec_to_wim_timestamp(&root_stbuf.st_mtim);
 224         inode->last_write_time = timespec_to_wim_timestamp(&root_stbuf.st_mtim);
 225         inode->last_access_time = timespec_to_wim_timestamp(&root_stbuf.st_atim);
 226 #else
 227         inode->creation_time = unix_timestamp_to_wim(root_stbuf.st_mtime);
 228         inode->last_write_time = unix_timestamp_to_wim(root_stbuf.st_mtime);
 229         inode->last_access_time = unix_timestamp_to_wim(root_stbuf.st_atime);
 230 #endif
 231         if (sizeof(ino_t) >= 8)
 232                 inode->ino = (u64)root_stbuf.st_ino;
 233         else
 234                 inode->ino = (u64)root_stbuf.st_ino |
 235                                    ((u64)root_stbuf.st_dev << ((sizeof(ino_t) * 8) & 63));
 236
 237         add_image_flags &= ~WIMLIB_ADD_IMAGE_FLAG_ROOT;
 238         inode->resolved = 1;
 239
 240         if (S_ISREG(root_stbuf.st_mode)) { /* Archiving a regular file */
 241
 242                 struct lookup_table_entry *lte;
 243                 u8 hash[SHA1_HASH_SIZE];
 244
 245                 inode->attributes = FILE_ATTRIBUTE_NORMAL;
 246
 247                 /* Empty files do not have to have a lookup table entry. */
 248                 if (root_stbuf.st_size == 0)
 249                         goto out;
 250
 251                 /* For each regular file, we must check to see if the file is in
 252                  * the lookup table already; if it is, we increment its refcnt;
 253                  * otherwise, we create a new lookup table entry and insert it.
 254                  * */
 255
 256                 ret = sha1sum(root_disk_path, hash);
 257                 if (ret != 0)
 258                         goto out;
 259
 260                 lte = __lookup_resource(lookup_table, hash);
 261                 if (lte) {
 262                         lte->refcnt++;
 263                         DEBUG("Add lte reference %u for `%s'", lte->refcnt,
 264                               root_disk_path);
 265                 } else {
 266                         char *file_on_disk = STRDUP(root_disk_path);
 267                         if (!file_on_disk) {
 268                                 ERROR("Failed to allocate memory for file path");
 269                                 ret = WIMLIB_ERR_NOMEM;
 270                                 goto out;
 271                         }
 272                         lte = new_lookup_table_entry();
 273                         if (!lte) {
 274                                 FREE(file_on_disk);
 275                                 ret = WIMLIB_ERR_NOMEM;
 276                                 goto out;
 277                         }
 278                         lte->file_on_disk = file_on_disk;
 279                         lte->resource_location = RESOURCE_IN_FILE_ON_DISK;
 280                         lte->resource_entry.original_size = root_stbuf.st_size;
 281                         lte->resource_entry.size = root_stbuf.st_size;
 282                         copy_hash(lte->hash, hash);
 283                         lookup_table_insert(lookup_table, lte);
 284                 }
 285                 root->d_inode->lte = lte;
 286         } else if (S_ISDIR(root_stbuf.st_mode)) { /* Archiving a directory */
 287
 288                 inode->attributes = FILE_ATTRIBUTE_DIRECTORY;
 289
 290                 DIR *dir;
 291                 struct dirent entry, *result;
 292                 struct dentry *child;
 293
 294                 dir = opendir(root_disk_path);
 295                 if (!dir) {
 296                         ERROR_WITH_ERRNO("Failed to open the directory `%s'",
 297                                          root_disk_path);
 298                         ret = WIMLIB_ERR_OPEN;
 299                         goto out;
 300                 }
 301
 302                 /* Buffer for names of files in directory. */
 303                 size_t len = strlen(root_disk_path);
 304                 char name[len + 1 + FILENAME_MAX + 1];
 305                 memcpy(name, root_disk_path, len);
 306                 name[len] = '/';
 307
 308                 /* Create a dentry for each entry in the directory on disk, and recurse
 309                  * to any subdirectories. */
 310                 while (1) {
 311                         errno = 0;
 312                         ret = readdir_r(dir, &entry, &result);
 313                         if (ret != 0) {
 314                                 ret = WIMLIB_ERR_READ;
 315                                 ERROR_WITH_ERRNO("Error reading the "
 316                                                  "directory `%s'",
 317                                                  root_disk_path);
 318                                 break;
 319                         }
 320                         if (result == NULL)
 321                                 break;
 322                         if (result->d_name[0] == '.' && (result->d_name[1] == '\0'
 323                               || (result->d_name[1] == '.' && result->d_name[2] == '\0')))
 324                                         continue;
 325                         strcpy(name + len + 1, result->d_name);
 326                         ret = build_dentry_tree(&child, name, lookup_table,
 327                                                 NULL, config, add_image_flags,
 328                                                 progress_func, NULL);
 329                         if (ret != 0)
 330                                 break;
 331                         if (child)
 332                                 dentry_add_child(root, child);
 333                 }
 334                 closedir(dir);
 335         } else { /* Archiving a symbolic link */
 336                 inode->attributes = FILE_ATTRIBUTE_REPARSE_POINT;
 337                 inode->reparse_tag = WIM_IO_REPARSE_TAG_SYMLINK;
 338
 339                 /* The idea here is to call readlink() to get the UNIX target of
 340                  * the symbolic link, then turn the target into a reparse point
 341                  * data buffer that contains a relative or absolute symbolic
 342                  * link (NOT a junction point or *full* path symbolic link with
 343                  * drive letter).
 344                  */
 345
 346                 char deref_name_buf[4096];
 347                 ssize_t deref_name_len;
 348
 349                 deref_name_len = readlink(root_disk_path, deref_name_buf,
 350                                           sizeof(deref_name_buf) - 1);
 351                 if (deref_name_len >= 0) {
 352                         deref_name_buf[deref_name_len] = '\0';
 353                         DEBUG("Read symlink `%s'", deref_name_buf);
 354                         ret = inode_set_symlink(root->d_inode, deref_name_buf,
 355                                                 lookup_table, NULL);
 356                         if (ret == 0) {
 357                                 /*
 358                                  * Unfortunately, Windows seems to have the
 359                                  * concept of "file" symbolic links as being
 360                                  * different from "directory" symbolic links...
 361                                  * so FILE_ATTRIBUTE_DIRECTORY needs to be set
 362                                  * on the symbolic link if the *target* of the
 363                                  * symbolic link is a directory.
 364                                  */
 365                                 struct stat stbuf;
 366                                 if (stat(root_disk_path, &stbuf) == 0 &&
 367                                     S_ISDIR(stbuf.st_mode))
 368                                 {
 369                                         inode->attributes |= FILE_ATTRIBUTE_DIRECTORY;
 370                                 }
 371                         }
 372                 } else {
 373                         ERROR_WITH_ERRNO("Failed to read target of "
 374                                          "symbolic link `%s'", root_disk_path);
 375                         ret = WIMLIB_ERR_READLINK;
 376                 }
 377         }
 378 out:
 379         if (ret == 0)
 380                 *root_ret = root;
 381         else
 382                 free_dentry_tree(root, lookup_table);
 383         return ret;
 384 }
 385
 386
 387 enum pattern_type {
 388         NONE = 0,
 389         EXCLUSION_LIST,
 390         EXCLUSION_EXCEPTION,
 391         COMPRESSION_EXCLUSION_LIST,
 392         ALIGNMENT_LIST,
 393 };
 394
 395 /* Default capture configuration file when none is specified. */
 396 static const char *default_config =
 397 "[ExclusionList]\n"
 398 "\\$ntfs.log\n"
 399 "\\hiberfil.sys\n"
 400 "\\pagefile.sys\n"
 401 "\\System Volume Information\n"
 402 "\\RECYCLER\n"
 403 "\\Windows\\CSC\n"
 404 "\n"
 405 "[CompressionExclusionList]\n"
 406 "*.mp3\n"
 407 "*.zip\n"
 408 "*.cab\n"
 409 "\\WINDOWS\\inf\\*.pnf\n";
 410
 411 static void destroy_pattern_list(struct pattern_list *list)
 412 {
 413         FREE(list->pats);
 414 }
 415
 416 static void destroy_capture_config(struct capture_config *config)
 417 {
 418         destroy_pattern_list(&config->exclusion_list);
 419         destroy_pattern_list(&config->exclusion_exception);
 420         destroy_pattern_list(&config->compression_exclusion_list);
 421         destroy_pattern_list(&config->alignment_list);
 422         FREE(config->config_str);
 423         FREE(config->prefix);
 424         memset(config, 0, sizeof(*config));
 425 }
 426
 427 static int pattern_list_add_pattern(struct pattern_list *list,
 428                                     const char *pattern)
 429 {
 430         const char **pats;
 431         if (list->num_pats >= list->num_allocated_pats) {
 432                 pats = REALLOC(list->pats,
 433                                sizeof(list->pats[0]) * (list->num_allocated_pats + 8));
 434                 if (!pats)
 435                         return WIMLIB_ERR_NOMEM;
 436                 list->num_allocated_pats += 8;
 437                 list->pats = pats;
 438         }
 439         list->pats[list->num_pats++] = pattern;
 440         return 0;
 441 }
 442
 443 /* Parses the contents of the image capture configuration file and fills in a
 444  * `struct capture_config'. */
 445 static int init_capture_config(const char *_config_str, size_t config_len,
 446                                const char *_prefix, struct capture_config *config)
 447 {
 448         char *config_str;
 449         char *prefix;
 450         char *p;
 451         char *eol;
 452         char *next_p;
 453         size_t bytes_remaining;
 454         enum pattern_type type = NONE;
 455         int ret;
 456         unsigned long line_no = 0;
 457
 458         DEBUG("config_len = %zu", config_len);
 459         bytes_remaining = config_len;
 460         memset(config, 0, sizeof(*config));
 461         config_str = MALLOC(config_len);
 462         if (!config_str) {
 463                 ERROR("Could not duplicate capture config string");
 464                 return WIMLIB_ERR_NOMEM;
 465         }
 466         prefix = STRDUP(_prefix);
 467         if (!prefix) {
 468                 FREE(config_str);
 469                 return WIMLIB_ERR_NOMEM;
 470         }
 471
 472         memcpy(config_str, _config_str, config_len);
 473         next_p = config_str;
 474         config->config_str = config_str;
 475         config->prefix = prefix;
 476         config->prefix_len = strlen(prefix);
 477         while (bytes_remaining) {
 478                 line_no++;
 479                 p = next_p;
 480                 eol = memchr(p, '\n', bytes_remaining);
 481                 if (!eol) {
 482                         ERROR("Expected end-of-line in capture config file on "
 483                               "line %lu", line_no);
 484                         ret = WIMLIB_ERR_INVALID_CAPTURE_CONFIG;
 485                         goto out_destroy;
 486                 }
 487
 488                 next_p = eol + 1;
 489                 bytes_remaining -= (next_p - p);
 490                 if (eol == p)
 491                         continue;
 492
 493                 if (*(eol - 1) == '\r')
 494                         eol--;
 495                 *eol = '\0';
 496
 497                 /* Translate backslash to forward slash */
 498                 for (char *pp = p; pp != eol; pp++)
 499                         if (*pp == '\\')
 500                                 *pp = '/';
 501
 502                 /* Remove drive letter */
 503                 if (eol - p > 2 && isalpha(*p) && *(p + 1) == ':')
 504                         p += 2;
 505
 506                 ret = 0;
 507                 if (strcmp(p, "[ExclusionList]") == 0)
 508                         type = EXCLUSION_LIST;
 509                 else if (strcmp(p, "[ExclusionException]") == 0)
 510                         type = EXCLUSION_EXCEPTION;
 511                 else if (strcmp(p, "[CompressionExclusionList]") == 0)
 512                         type = COMPRESSION_EXCLUSION_LIST;
 513                 else if (strcmp(p, "[AlignmentList]") == 0)
 514                         type = ALIGNMENT_LIST;
 515                 else if (p[0] == '[' && strrchr(p, ']')) {
 516                         ERROR("Unknown capture configuration section `%s'", p);
 517                         ret = WIMLIB_ERR_INVALID_CAPTURE_CONFIG;
 518                 } else switch (type) {
 519                 case EXCLUSION_LIST:
 520                         DEBUG("Adding pattern \"%s\" to exclusion list", p);
 521                         ret = pattern_list_add_pattern(&config->exclusion_list, p);
 522                         break;
 523                 case EXCLUSION_EXCEPTION:
 524                         DEBUG("Adding pattern \"%s\" to exclusion exception list", p);
 525                         ret = pattern_list_add_pattern(&config->exclusion_exception, p);
 526                         break;
 527                 case COMPRESSION_EXCLUSION_LIST:
 528                         DEBUG("Adding pattern \"%s\" to compression exclusion list", p);
 529                         ret = pattern_list_add_pattern(&config->compression_exclusion_list, p);
 530                         break;
 531                 case ALIGNMENT_LIST:
 532                         DEBUG("Adding pattern \"%s\" to alignment list", p);
 533                         ret = pattern_list_add_pattern(&config->alignment_list, p);
 534                         break;
 535                 default:
 536                         ERROR("Line %lu of capture configuration is not "
 537                               "in a block (such as [ExclusionList])",
 538                               line_no);
 539                         ret = WIMLIB_ERR_INVALID_CAPTURE_CONFIG;
 540                         break;
 541                 }
 542                 if (ret != 0)
 543                         goto out_destroy;
 544         }
 545         return 0;
 546 out_destroy:
 547         destroy_capture_config(config);
 548         return ret;
 549 }
 550
 551 static bool match_pattern(const char *path, const char *path_basename,
 552                           const struct pattern_list *list)
 553 {
 554         for (size_t i = 0; i < list->num_pats; i++) {
 555                 const char *pat = list->pats[i];
 556                 const char *string;
 557                 if (pat[0] == '/')
 558                         /* Absolute path from root of capture */
 559                         string = path;
 560                 else {
 561                         if (strchr(pat, '/'))
 562                                 /* Relative path from root of capture */
 563                                 string = path + 1;
 564                         else
 565                                 /* A file name pattern */
 566                                 string = path_basename;
 567                 }
 568                 if (fnmatch(pat, string, FNM_PATHNAME
 569                         #ifdef FNM_CASEFOLD
 570                                         | FNM_CASEFOLD
 571                         #endif
 572                         ) == 0)
 573                 {
 574                         DEBUG("`%s' matches the pattern \"%s\"",
 575                               string, pat);
 576                         return true;
 577                 }
 578         }
 579         return false;
 580 }
 581
 582 static void print_pattern_list(const struct pattern_list *list)
 583 {
 584         for (size_t i = 0; i < list->num_pats; i++)
 585                 printf("    %s\n", list->pats[i]);
 586 }
 587
 588 static void print_capture_config(const struct capture_config *config)
 589 {
 590         if (config->exclusion_list.num_pats) {
 591                 puts("Files or folders excluded from image capture:");
 592                 print_pattern_list(&config->exclusion_list);
 593                 putchar('\n');
 594         }
 595 }
 596
 597 /* Return true if the image capture configuration file indicates we should
 598  * exclude the filename @path from capture.
 599  *
 600  * If @exclude_prefix is %true, the part of the path up and including the name
 601  * of the directory being captured is not included in the path for matching
 602  * purposes.  This allows, for example, a pattern like /hiberfil.sys to match a
 603  * file /mnt/windows7/hiberfil.sys if we are capturing the /mnt/windows7
 604  * directory.
 605  */
 606 bool exclude_path(const char *path, const struct capture_config *config,
 607                   bool exclude_prefix)
 608 {
 609         const char *basename = path_basename(path);
 610         if (exclude_prefix) {
 611                 wimlib_assert(strlen(path) >= config->prefix_len);
 612                 if (memcmp(config->prefix, path, config->prefix_len) == 0
 613                      && path[config->prefix_len] == '/')
 614                         path += config->prefix_len;
 615         }
 616         return match_pattern(path, basename, &config->exclusion_list) &&
 617                 !match_pattern(path, basename, &config->exclusion_exception);
 618
 619 }
 620
 621 WIMLIBAPI int wimlib_add_image(WIMStruct *w, const char *source,
 622                                const char *name, const char *config_str,
 623                                size_t config_len, int add_image_flags,
 624                                wimlib_progress_func_t progress_func)
 625 {
 626         int (*capture_tree)(struct dentry **, const char *,
 627                             struct lookup_table *,
 628                             struct wim_security_data *,
 629                             const struct capture_config *,
 630                             int, wimlib_progress_func_t, void *);
 631         void *extra_arg;
 632
 633         struct dentry *root_dentry = NULL;
 634         struct wim_security_data *sd;
 635         struct capture_config config;
 636         struct image_metadata *imd;
 637         int ret;
 638
 639         if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_NTFS) {
 640 #ifdef WITH_NTFS_3G
 641                 if (add_image_flags & (WIMLIB_ADD_IMAGE_FLAG_DEREFERENCE)) {
 642                         ERROR("Cannot dereference files when capturing directly from NTFS");
 643                         return WIMLIB_ERR_INVALID_PARAM;
 644                 }
 645                 capture_tree = build_dentry_tree_ntfs;
 646                 extra_arg = &w->ntfs_vol;
 647 #else
 648                 ERROR("wimlib was compiled without support for NTFS-3g, so\n"
 649                       "        cannot capture a WIM image directly from a NTFS volume!");
 650                 return WIMLIB_ERR_UNSUPPORTED;
 651 #endif
 652         } else {
 653                 capture_tree = build_dentry_tree;
 654                 extra_arg = NULL;
 655         }
 656
 657         DEBUG("Adding dentry tree from directory or NTFS volume `%s'.", source);
 658
 659         if (!name || !*name) {
 660                 ERROR("Must specify a non-empty string for the image name");
 661                 return WIMLIB_ERR_INVALID_PARAM;
 662         }
 663         if (!source || !*source) {
 664                 ERROR("Must specify the name of a directory or NTFS volume");
 665                 return WIMLIB_ERR_INVALID_PARAM;
 666         }
 667
 668         if (w->hdr.total_parts != 1) {
 669                 ERROR("Cannot add an image to a split WIM");
 670                 return WIMLIB_ERR_SPLIT_UNSUPPORTED;
 671         }
 672
 673         if (wimlib_image_name_in_use(w, name)) {
 674                 ERROR("There is already an image named \"%s\" in `%s'",
 675                       name, w->filename);
 676                 return WIMLIB_ERR_IMAGE_NAME_COLLISION;
 677         }
 678
 679         DEBUG("Initializing capture configuration");
 680         if (!config_str) {
 681                 DEBUG("Using default capture configuration");
 682                 config_str = default_config;
 683                 config_len = strlen(default_config);
 684         }
 685         ret = init_capture_config(config_str, config_len, source, &config);
 686         if (ret != 0)
 687                 return ret;
 688         print_capture_config(&config);
 689
 690         DEBUG("Allocating security data");
 691
 692         sd = CALLOC(1, sizeof(struct wim_security_data));
 693         if (!sd) {
 694                 ret = WIMLIB_ERR_NOMEM;
 695                 goto out_destroy_config;
 696         }
 697         sd->total_length = 8;
 698         sd->refcnt = 1;
 699
 700         if (progress_func) {
 701                 union wimlib_progress_info progress;
 702                 progress.scan.source = source;
 703                 progress_func(WIMLIB_PROGRESS_MSG_SCAN_BEGIN, &progress);
 704         }
 705
 706         DEBUG("Building dentry tree.");
 707         ret = (*capture_tree)(&root_dentry, source, w->lookup_table, sd,
 708                               &config, add_image_flags | WIMLIB_ADD_IMAGE_FLAG_ROOT,
 709                               progress_func, extra_arg);
 710         destroy_capture_config(&config);
 711
 712         if (ret != 0) {
 713                 ERROR("Failed to build dentry tree for `%s'", source);
 714                 goto out_free_security_data;
 715         }
 716
 717         if (progress_func) {
 718                 union wimlib_progress_info progress;
 719                 progress.scan.source = source;
 720                 progress_func(WIMLIB_PROGRESS_MSG_SCAN_END, &progress);
 721         }
 722
 723         DEBUG("Calculating full paths of dentries.");
 724         ret = for_dentry_in_tree(root_dentry, calculate_dentry_full_path, NULL);
 725         if (ret != 0)
 726                 goto out_free_dentry_tree;
 727
 728         ret = add_new_dentry_tree(w, root_dentry, sd);
 729         if (ret != 0)
 730                 goto out_free_dentry_tree;
 731
 732         imd = &w->image_metadata[w->hdr.image_count - 1];
 733
 734         ret = dentry_tree_fix_inodes(root_dentry, &imd->inode_list);
 735         if (ret != 0)
 736                 goto out_destroy_imd;
 737
 738         DEBUG("Assigning hard link group IDs");
 739         assign_inode_numbers(&imd->inode_list);
 740
 741         ret = xml_add_image(w, name);
 742         if (ret != 0)
 743                 goto out_destroy_imd;
 744
 745         if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_BOOT)
 746                 wimlib_set_boot_idx(w, w->hdr.image_count);
 747         return 0;
 748 out_destroy_imd:
 749         destroy_image_metadata(&w->image_metadata[w->hdr.image_count - 1],
 750                                w->lookup_table);
 751         w->hdr.image_count--;
 752         return ret;
 753 out_free_dentry_tree:
 754         free_dentry_tree(root_dentry, w->lookup_table);
 755 out_free_security_data:
 756         free_security_data(sd);
 757 out_destroy_config:
 758         destroy_capture_config(&config);
 759         return ret;
 760 }