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         int ret;
  62
  63         wimlib_assert(root_dentry != NULL);
  64
  65         DEBUG("Reallocating image metadata array for image_count = %u",
  66               w->hdr.image_count + 1);
  67         imd = CALLOC((w->hdr.image_count + 1), sizeof(struct image_metadata));
  68
  69         if (!imd) {
  70                 ERROR("Failed to allocate memory for new image metadata array");
  71                 goto err;
  72         }
  73
  74         memcpy(imd, w->image_metadata,
  75                w->hdr.image_count * sizeof(struct image_metadata));
  76
  77         metadata_lte = new_lookup_table_entry();
  78         if (!metadata_lte)
  79                 goto err_free_imd;
  80
  81         metadata_lte->resource_entry.flags = WIM_RESHDR_FLAG_METADATA;
  82         random_hash(metadata_lte->hash);
  83         lookup_table_insert(w->lookup_table, metadata_lte);
  84
  85         new_imd = &imd[w->hdr.image_count];
  86
  87         new_imd->root_dentry    = root_dentry;
  88         new_imd->metadata_lte   = metadata_lte;
  89         new_imd->security_data  = sd;
  90         new_imd->modified       = 1;
  91
  92         FREE(w->image_metadata);
  93         w->image_metadata = imd;
  94         w->hdr.image_count++;
  95         return 0;
  96 err_free_imd:
  97         FREE(imd);
  98 err:
  99         return WIMLIB_ERR_NOMEM;
 100
 101 }
 102
 103
 104 /*
 105  * Recursively builds a dentry tree from a directory tree on disk, outside the
 106  * WIM file.
 107  *
 108  * @root_ret:   Place to return a pointer to the root of the dentry tree.  Only
 109  *              modified if successful.  NULL if the file or directory was
 110  *              excluded from capture.
 111  *
 112  * @root_disk_path:  The path to the root of the directory tree on disk.
 113  *
 114  * @lookup_table: The lookup table for the WIM file.  For each file added to the
 115  *              dentry tree being built, an entry is added to the lookup table,
 116  *              unless an identical stream is already in the lookup table.
 117  *              These lookup table entries that are added point to the path of
 118  *              the file on disk.
 119  *
 120  * @sd:         Ignored.  (Security data only captured in NTFS mode.)
 121  *
 122  * @capture_config:
 123  *              Configuration for files to be excluded from capture.
 124  *
 125  * @add_flags:  Bitwise or of WIMLIB_ADD_IMAGE_FLAG_*
 126  *
 127  * @extra_arg:  Ignored. (Only used in NTFS mode.)
 128  *
 129  * @return:     0 on success, nonzero on failure.  It is a failure if any of
 130  *              the files cannot be `stat'ed, or if any of the needed
 131  *              directories cannot be opened or read.  Failure to add the files
 132  *              to the WIM may still occur later when trying to actually read
 133  *              the on-disk files during a call to wimlib_write() or
 134  *              wimlib_overwrite().
 135  */
 136 static int build_dentry_tree(struct dentry **root_ret,
 137                              const char *root_disk_path,
 138                              struct lookup_table *lookup_table,
 139                              struct wim_security_data *sd,
 140                              const struct capture_config *config,
 141                              int add_image_flags,
 142                              wimlib_progress_func_t progress_func,
 143                              void *extra_arg)
 144 {
 145         struct stat root_stbuf;
 146         int ret = 0;
 147         int (*stat_fn)(const char *restrict, struct stat *restrict);
 148         struct dentry *root;
 149         const char *filename;
 150         struct inode *inode;
 151
 152         if (exclude_path(root_disk_path, config, true)) {
 153                 if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_ROOT) {
 154                         ERROR("Cannot exclude the root directory from capture");
 155                         return WIMLIB_ERR_INVALID_CAPTURE_CONFIG;
 156                 }
 157                 if ((add_image_flags & WIMLIB_ADD_IMAGE_FLAG_VERBOSE)
 158                     && progress_func)
 159                 {
 160                         union wimlib_progress_info info;
 161                         info.scan.cur_path = root_disk_path;
 162                         info.scan.excluded = true;
 163                         progress_func(WIMLIB_PROGRESS_MSG_SCAN_DENTRY, &info);
 164                 }
 165                 *root_ret = NULL;
 166                 return 0;
 167         }
 168
 169         if ((add_image_flags & WIMLIB_ADD_IMAGE_FLAG_VERBOSE)
 170             && progress_func)
 171         {
 172                 union wimlib_progress_info info;
 173                 info.scan.cur_path = root_disk_path;
 174                 info.scan.excluded = false;
 175                 progress_func(WIMLIB_PROGRESS_MSG_SCAN_DENTRY, &info);
 176         }
 177
 178         if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_DEREFERENCE)
 179                 stat_fn = stat;
 180         else
 181                 stat_fn = lstat;
 182
 183         ret = (*stat_fn)(root_disk_path, &root_stbuf);
 184         if (ret != 0) {
 185                 ERROR_WITH_ERRNO("Failed to stat `%s'", root_disk_path);
 186                 return WIMLIB_ERR_STAT;
 187         }
 188
 189         if ((add_image_flags & WIMLIB_ADD_IMAGE_FLAG_ROOT) &&
 190               !S_ISDIR(root_stbuf.st_mode))
 191         {
 192                 /* Do a dereference-stat in case the root is a symbolic link.
 193                  * This case is allowed, provided that the symbolic link points
 194                  * to a directory. */
 195                 ret = stat(root_disk_path, &root_stbuf);
 196                 if (ret != 0) {
 197                         ERROR_WITH_ERRNO("Failed to stat `%s'", root_disk_path);
 198                         return WIMLIB_ERR_STAT;
 199                 }
 200                 if (!S_ISDIR(root_stbuf.st_mode)) {
 201                         ERROR("`%s' is not a directory", root_disk_path);
 202                         return WIMLIB_ERR_NOTDIR;
 203                 }
 204         }
 205         if (!S_ISREG(root_stbuf.st_mode) && !S_ISDIR(root_stbuf.st_mode)
 206             && !S_ISLNK(root_stbuf.st_mode)) {
 207                 ERROR("`%s' is not a regular file, directory, or symbolic link.",
 208                       root_disk_path);
 209                 return WIMLIB_ERR_SPECIAL_FILE;
 210         }
 211
 212         if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_ROOT)
 213                 filename = "";
 214         else
 215                 filename = path_basename(root_disk_path);
 216
 217         root = new_dentry_with_timeless_inode(filename);
 218         if (!root)
 219                 return WIMLIB_ERR_NOMEM;
 220
 221         inode = root->d_inode;
 222
 223 #ifdef HAVE_STAT_NANOSECOND_PRECISION
 224         inode->creation_time = timespec_to_wim_timestamp(&root_stbuf.st_mtim);
 225         inode->last_write_time = timespec_to_wim_timestamp(&root_stbuf.st_mtim);
 226         inode->last_access_time = timespec_to_wim_timestamp(&root_stbuf.st_atim);
 227 #else
 228         inode->creation_time = unix_timestamp_to_wim(root_stbuf.st_mtime);
 229         inode->last_write_time = unix_timestamp_to_wim(root_stbuf.st_mtime);
 230         inode->last_access_time = unix_timestamp_to_wim(root_stbuf.st_atime);
 231 #endif
 232         if (sizeof(ino_t) >= 8)
 233                 inode->ino = (u64)root_stbuf.st_ino;
 234         else
 235                 inode->ino = (u64)root_stbuf.st_ino |
 236                                    ((u64)root_stbuf.st_dev << ((sizeof(ino_t) * 8) & 63));
 237
 238         add_image_flags &= ~WIMLIB_ADD_IMAGE_FLAG_ROOT;
 239         inode->resolved = 1;
 240
 241         if (S_ISREG(root_stbuf.st_mode)) { /* Archiving a regular file */
 242
 243                 struct lookup_table_entry *lte;
 244                 u8 hash[SHA1_HASH_SIZE];
 245
 246                 inode->attributes = FILE_ATTRIBUTE_NORMAL;
 247
 248                 /* Empty files do not have to have a lookup table entry. */
 249                 if (root_stbuf.st_size == 0)
 250                         goto out;
 251
 252                 /* For each regular file, we must check to see if the file is in
 253                  * the lookup table already; if it is, we increment its refcnt;
 254                  * otherwise, we create a new lookup table entry and insert it.
 255                  * */
 256
 257                 ret = sha1sum(root_disk_path, hash);
 258                 if (ret != 0)
 259                         goto out;
 260
 261                 lte = __lookup_resource(lookup_table, hash);
 262                 if (lte) {
 263                         lte->refcnt++;
 264                         DEBUG("Add lte reference %u for `%s'", lte->refcnt,
 265                               root_disk_path);
 266                 } else {
 267                         char *file_on_disk = STRDUP(root_disk_path);
 268                         if (!file_on_disk) {
 269                                 ERROR("Failed to allocate memory for file path");
 270                                 ret = WIMLIB_ERR_NOMEM;
 271                                 goto out;
 272                         }
 273                         lte = new_lookup_table_entry();
 274                         if (!lte) {
 275                                 FREE(file_on_disk);
 276                                 ret = WIMLIB_ERR_NOMEM;
 277                                 goto out;
 278                         }
 279                         lte->file_on_disk = file_on_disk;
 280                         lte->resource_location = RESOURCE_IN_FILE_ON_DISK;
 281                         lte->resource_entry.original_size = root_stbuf.st_size;
 282                         lte->resource_entry.size = root_stbuf.st_size;
 283                         copy_hash(lte->hash, hash);
 284                         lookup_table_insert(lookup_table, lte);
 285                 }
 286                 root->d_inode->lte = lte;
 287         } else if (S_ISDIR(root_stbuf.st_mode)) { /* Archiving a directory */
 288
 289                 inode->attributes = FILE_ATTRIBUTE_DIRECTORY;
 290
 291                 DIR *dir;
 292                 struct dirent entry, *result;
 293                 struct dentry *child;
 294
 295                 dir = opendir(root_disk_path);
 296                 if (!dir) {
 297                         ERROR_WITH_ERRNO("Failed to open the directory `%s'",
 298                                          root_disk_path);
 299                         ret = WIMLIB_ERR_OPEN;
 300                         goto out;
 301                 }
 302
 303                 /* Buffer for names of files in directory. */
 304                 size_t len = strlen(root_disk_path);
 305                 char name[len + 1 + FILENAME_MAX + 1];
 306                 memcpy(name, root_disk_path, len);
 307                 name[len] = '/';
 308
 309                 /* Create a dentry for each entry in the directory on disk, and recurse
 310                  * to any subdirectories. */
 311                 while (1) {
 312                         errno = 0;
 313                         ret = readdir_r(dir, &entry, &result);
 314                         if (ret != 0) {
 315                                 ret = WIMLIB_ERR_READ;
 316                                 ERROR_WITH_ERRNO("Error reading the "
 317                                                  "directory `%s'",
 318                                                  root_disk_path);
 319                                 break;
 320                         }
 321                         if (result == NULL)
 322                                 break;
 323                         if (result->d_name[0] == '.' && (result->d_name[1] == '\0'
 324                               || (result->d_name[1] == '.' && result->d_name[2] == '\0')))
 325                                         continue;
 326                         strcpy(name + len + 1, result->d_name);
 327                         ret = build_dentry_tree(&child, name, lookup_table,
 328                                                 NULL, config, add_image_flags,
 329                                                 progress_func, NULL);
 330                         if (ret != 0)
 331                                 break;
 332                         if (child)
 333                                 dentry_add_child(root, child);
 334                 }
 335                 closedir(dir);
 336         } else { /* Archiving a symbolic link */
 337                 inode->attributes = FILE_ATTRIBUTE_REPARSE_POINT;
 338                 inode->reparse_tag = WIM_IO_REPARSE_TAG_SYMLINK;
 339
 340                 /* The idea here is to call readlink() to get the UNIX target of
 341                  * the symbolic link, then turn the target into a reparse point
 342                  * data buffer that contains a relative or absolute symbolic
 343                  * link (NOT a junction point or *full* path symbolic link with
 344                  * drive letter).
 345                  */
 346
 347                 char deref_name_buf[4096];
 348                 ssize_t deref_name_len;
 349
 350                 deref_name_len = readlink(root_disk_path, deref_name_buf,
 351                                           sizeof(deref_name_buf) - 1);
 352                 if (deref_name_len >= 0) {
 353                         deref_name_buf[deref_name_len] = '\0';
 354                         DEBUG("Read symlink `%s'", deref_name_buf);
 355                         ret = inode_set_symlink(root->d_inode, deref_name_buf,
 356                                                 lookup_table, NULL);
 357                         if (ret == 0) {
 358                                 /*
 359                                  * Unfortunately, Windows seems to have the
 360                                  * concept of "file" symbolic links as being
 361                                  * different from "directory" symbolic links...
 362                                  * so FILE_ATTRIBUTE_DIRECTORY needs to be set
 363                                  * on the symbolic link if the *target* of the
 364                                  * symbolic link is a directory.
 365                                  */
 366                                 struct stat stbuf;
 367                                 if (stat(root_disk_path, &stbuf) == 0 &&
 368                                     S_ISDIR(stbuf.st_mode))
 369                                 {
 370                                         inode->attributes |= FILE_ATTRIBUTE_DIRECTORY;
 371                                 }
 372                         }
 373                 } else {
 374                         ERROR_WITH_ERRNO("Failed to read target of "
 375                                          "symbolic link `%s'", root_disk_path);
 376                         ret = WIMLIB_ERR_READLINK;
 377                 }
 378         }
 379 out:
 380         if (ret == 0)
 381                 *root_ret = root;
 382         else
 383                 free_dentry_tree(root, lookup_table);
 384         return ret;
 385 }
 386
 387
 388 enum pattern_type {
 389         NONE = 0,
 390         EXCLUSION_LIST,
 391         EXCLUSION_EXCEPTION,
 392         COMPRESSION_EXCLUSION_LIST,
 393         ALIGNMENT_LIST,
 394 };
 395
 396 /* Default capture configuration file when none is specified. */
 397 static const char *default_config =
 398 "[ExclusionList]\n"
 399 "\\$ntfs.log\n"
 400 "\\hiberfil.sys\n"
 401 "\\pagefile.sys\n"
 402 "\\System Volume Information\n"
 403 "\\RECYCLER\n"
 404 "\\Windows\\CSC\n"
 405 "\n"
 406 "[CompressionExclusionList]\n"
 407 "*.mp3\n"
 408 "*.zip\n"
 409 "*.cab\n"
 410 "\\WINDOWS\\inf\\*.pnf\n";
 411
 412 static void destroy_pattern_list(struct pattern_list *list)
 413 {
 414         FREE(list->pats);
 415 }
 416
 417 static void destroy_capture_config(struct capture_config *config)
 418 {
 419         destroy_pattern_list(&config->exclusion_list);
 420         destroy_pattern_list(&config->exclusion_exception);
 421         destroy_pattern_list(&config->compression_exclusion_list);
 422         destroy_pattern_list(&config->alignment_list);
 423         FREE(config->config_str);
 424         FREE(config->prefix);
 425         memset(config, 0, sizeof(*config));
 426 }
 427
 428 static int pattern_list_add_pattern(struct pattern_list *list,
 429                                     const char *pattern)
 430 {
 431         const char **pats;
 432         if (list->num_pats >= list->num_allocated_pats) {
 433                 pats = REALLOC(list->pats,
 434                                sizeof(list->pats[0]) * (list->num_allocated_pats + 8));
 435                 if (!pats)
 436                         return WIMLIB_ERR_NOMEM;
 437                 list->num_allocated_pats += 8;
 438                 list->pats = pats;
 439         }
 440         list->pats[list->num_pats++] = pattern;
 441         return 0;
 442 }
 443
 444 /* Parses the contents of the image capture configuration file and fills in a
 445  * `struct capture_config'. */
 446 static int init_capture_config(const char *_config_str, size_t config_len,
 447                                const char *_prefix, struct capture_config *config)
 448 {
 449         char *config_str;
 450         char *prefix;
 451         char *p;
 452         char *eol;
 453         char *next_p;
 454         size_t bytes_remaining;
 455         enum pattern_type type = NONE;
 456         int ret;
 457         unsigned long line_no = 0;
 458
 459         DEBUG("config_len = %zu", config_len);
 460         bytes_remaining = config_len;
 461         memset(config, 0, sizeof(*config));
 462         config_str = MALLOC(config_len);
 463         if (!config_str) {
 464                 ERROR("Could not duplicate capture config string");
 465                 return WIMLIB_ERR_NOMEM;
 466         }
 467         prefix = STRDUP(_prefix);
 468         if (!prefix) {
 469                 FREE(config_str);
 470                 return WIMLIB_ERR_NOMEM;
 471         }
 472
 473         memcpy(config_str, _config_str, config_len);
 474         next_p = config_str;
 475         config->config_str = config_str;
 476         config->prefix = prefix;
 477         config->prefix_len = strlen(prefix);
 478         while (bytes_remaining) {
 479                 line_no++;
 480                 p = next_p;
 481                 eol = memchr(p, '\n', bytes_remaining);
 482                 if (!eol) {
 483                         ERROR("Expected end-of-line in capture config file on "
 484                               "line %lu", line_no);
 485                         ret = WIMLIB_ERR_INVALID_CAPTURE_CONFIG;
 486                         goto out_destroy;
 487                 }
 488
 489                 next_p = eol + 1;
 490                 bytes_remaining -= (next_p - p);
 491                 if (eol == p)
 492                         continue;
 493
 494                 if (*(eol - 1) == '\r')
 495                         eol--;
 496                 *eol = '\0';
 497
 498                 /* Translate backslash to forward slash */
 499                 for (char *pp = p; pp != eol; pp++)
 500                         if (*pp == '\\')
 501                                 *pp = '/';
 502
 503                 /* Remove drive letter */
 504                 if (eol - p > 2 && isalpha(*p) && *(p + 1) == ':')
 505                         p += 2;
 506
 507                 ret = 0;
 508                 if (strcmp(p, "[ExclusionList]") == 0)
 509                         type = EXCLUSION_LIST;
 510                 else if (strcmp(p, "[ExclusionException]") == 0)
 511                         type = EXCLUSION_EXCEPTION;
 512                 else if (strcmp(p, "[CompressionExclusionList]") == 0)
 513                         type = COMPRESSION_EXCLUSION_LIST;
 514                 else if (strcmp(p, "[AlignmentList]") == 0)
 515                         type = ALIGNMENT_LIST;
 516                 else if (p[0] == '[' && strrchr(p, ']')) {
 517                         ERROR("Unknown capture configuration section `%s'", p);
 518                         ret = WIMLIB_ERR_INVALID_CAPTURE_CONFIG;
 519                 } else switch (type) {
 520                 case EXCLUSION_LIST:
 521                         DEBUG("Adding pattern \"%s\" to exclusion list", p);
 522                         ret = pattern_list_add_pattern(&config->exclusion_list, p);
 523                         break;
 524                 case EXCLUSION_EXCEPTION:
 525                         DEBUG("Adding pattern \"%s\" to exclusion exception list", p);
 526                         ret = pattern_list_add_pattern(&config->exclusion_exception, p);
 527                         break;
 528                 case COMPRESSION_EXCLUSION_LIST:
 529                         DEBUG("Adding pattern \"%s\" to compression exclusion list", p);
 530                         ret = pattern_list_add_pattern(&config->compression_exclusion_list, p);
 531                         break;
 532                 case ALIGNMENT_LIST:
 533                         DEBUG("Adding pattern \"%s\" to alignment list", p);
 534                         ret = pattern_list_add_pattern(&config->alignment_list, p);
 535                         break;
 536                 default:
 537                         ERROR("Line %lu of capture configuration is not "
 538                               "in a block (such as [ExclusionList])",
 539                               line_no);
 540                         ret = WIMLIB_ERR_INVALID_CAPTURE_CONFIG;
 541                         break;
 542                 }
 543                 if (ret != 0)
 544                         goto out_destroy;
 545         }
 546         return 0;
 547 out_destroy:
 548         destroy_capture_config(config);
 549         return ret;
 550 }
 551
 552 static bool match_pattern(const char *path, const char *path_basename,
 553                           const struct pattern_list *list)
 554 {
 555         for (size_t i = 0; i < list->num_pats; i++) {
 556                 const char *pat = list->pats[i];
 557                 const char *string;
 558                 if (pat[0] == '/')
 559                         /* Absolute path from root of capture */
 560                         string = path;
 561                 else {
 562                         if (strchr(pat, '/'))
 563                                 /* Relative path from root of capture */
 564                                 string = path + 1;
 565                         else
 566                                 /* A file name pattern */
 567                                 string = path_basename;
 568                 }
 569                 if (fnmatch(pat, string, FNM_PATHNAME
 570                         #ifdef FNM_CASEFOLD
 571                                         | FNM_CASEFOLD
 572                         #endif
 573                         ) == 0)
 574                 {
 575                         DEBUG("`%s' matches the pattern \"%s\"",
 576                               string, pat);
 577                         return true;
 578                 }
 579         }
 580         return false;
 581 }
 582
 583 static void print_pattern_list(const struct pattern_list *list)
 584 {
 585         for (size_t i = 0; i < list->num_pats; i++)
 586                 printf("    %s\n", list->pats[i]);
 587 }
 588
 589 static void print_capture_config(const struct capture_config *config)
 590 {
 591         if (config->exclusion_list.num_pats) {
 592                 puts("Files or folders excluded from image capture:");
 593                 print_pattern_list(&config->exclusion_list);
 594                 putchar('\n');
 595         }
 596 }
 597
 598 /* Return true if the image capture configuration file indicates we should
 599  * exclude the filename @path from capture.
 600  *
 601  * If @exclude_prefix is %true, the part of the path up and including the name
 602  * of the directory being captured is not included in the path for matching
 603  * purposes.  This allows, for example, a pattern like /hiberfil.sys to match a
 604  * file /mnt/windows7/hiberfil.sys if we are capturing the /mnt/windows7
 605  * directory.
 606  */
 607 bool exclude_path(const char *path, const struct capture_config *config,
 608                   bool exclude_prefix)
 609 {
 610         const char *basename = path_basename(path);
 611         if (exclude_prefix) {
 612                 wimlib_assert(strlen(path) >= config->prefix_len);
 613                 if (memcmp(config->prefix, path, config->prefix_len) == 0
 614                      && path[config->prefix_len] == '/')
 615                         path += config->prefix_len;
 616         }
 617         return match_pattern(path, basename, &config->exclusion_list) &&
 618                 !match_pattern(path, basename, &config->exclusion_exception);
 619
 620 }
 621
 622 WIMLIBAPI int wimlib_add_image(WIMStruct *w, const char *source,
 623                                const char *name, const char *config_str,
 624                                size_t config_len, int add_image_flags,
 625                                wimlib_progress_func_t progress_func)
 626 {
 627         int (*capture_tree)(struct dentry **, const char *,
 628                             struct lookup_table *,
 629                             struct wim_security_data *,
 630                             const struct capture_config *,
 631                             int, wimlib_progress_func_t, void *);
 632         void *extra_arg;
 633
 634         struct dentry *root_dentry = NULL;
 635         struct wim_security_data *sd;
 636         struct capture_config config;
 637         struct hlist_head inode_list;
 638         int ret;
 639
 640         if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_NTFS) {
 641 #ifdef WITH_NTFS_3G
 642                 if (add_image_flags & (WIMLIB_ADD_IMAGE_FLAG_DEREFERENCE)) {
 643                         ERROR("Cannot dereference files when capturing directly from NTFS");
 644                         return WIMLIB_ERR_INVALID_PARAM;
 645                 }
 646                 capture_tree = build_dentry_tree_ntfs;
 647                 extra_arg = &w->ntfs_vol;
 648 #else
 649                 ERROR("wimlib was compiled without support for NTFS-3g, so\n"
 650                       "        cannot capture a WIM image directly from a NTFS volume!");
 651                 return WIMLIB_ERR_UNSUPPORTED;
 652 #endif
 653         } else {
 654                 capture_tree = build_dentry_tree;
 655                 extra_arg = NULL;
 656         }
 657
 658         DEBUG("Adding dentry tree from directory or NTFS volume `%s'.", source);
 659
 660         if (!name || !*name) {
 661                 ERROR("Must specify a non-empty string for the image name");
 662                 return WIMLIB_ERR_INVALID_PARAM;
 663         }
 664         if (!source || !*source) {
 665                 ERROR("Must specify the name of a directory or NTFS volume");
 666                 return WIMLIB_ERR_INVALID_PARAM;
 667         }
 668
 669         if (w->hdr.total_parts != 1) {
 670                 ERROR("Cannot add an image to a split WIM");
 671                 return WIMLIB_ERR_SPLIT_UNSUPPORTED;
 672         }
 673
 674         if (wimlib_image_name_in_use(w, name)) {
 675                 ERROR("There is already an image named \"%s\" in `%s'",
 676                       name, w->filename);
 677                 return WIMLIB_ERR_IMAGE_NAME_COLLISION;
 678         }
 679
 680         DEBUG("Initializing capture configuration");
 681         if (!config_str) {
 682                 DEBUG("Using default capture configuration");
 683                 config_str = default_config;
 684                 config_len = strlen(default_config);
 685         }
 686         ret = init_capture_config(config_str, config_len, source, &config);
 687         if (ret != 0)
 688                 return ret;
 689         print_capture_config(&config);
 690
 691         DEBUG("Allocating security data");
 692
 693         sd = CALLOC(1, sizeof(struct wim_security_data));
 694         if (!sd) {
 695                 ret = WIMLIB_ERR_NOMEM;
 696                 goto out_destroy_config;
 697         }
 698         sd->total_length = 8;
 699         sd->refcnt = 1;
 700
 701         if (progress_func) {
 702                 union wimlib_progress_info progress;
 703                 progress.scan.source = source;
 704                 progress_func(WIMLIB_PROGRESS_MSG_SCAN_BEGIN, &progress);
 705         }
 706
 707         DEBUG("Building dentry tree.");
 708         ret = (*capture_tree)(&root_dentry, source, w->lookup_table, sd,
 709                               &config, add_image_flags | WIMLIB_ADD_IMAGE_FLAG_ROOT,
 710                               progress_func, extra_arg);
 711         destroy_capture_config(&config);
 712
 713         if (ret != 0) {
 714                 ERROR("Failed to build dentry tree for `%s'", source);
 715                 goto out_free_security_data;
 716         }
 717
 718         if (progress_func) {
 719                 union wimlib_progress_info progress;
 720                 progress.scan.source = source;
 721                 progress_func(WIMLIB_PROGRESS_MSG_SCAN_END, &progress);
 722         }
 723
 724         DEBUG("Calculating full paths of dentries.");
 725         ret = for_dentry_in_tree(root_dentry, calculate_dentry_full_path, NULL);
 726         if (ret != 0)
 727                 goto out_free_dentry_tree;
 728
 729         ret = add_new_dentry_tree(w, root_dentry, sd);
 730         if (ret != 0)
 731                 goto out_free_dentry_tree;
 732
 733
 734         ret = dentry_tree_fix_inodes(root_dentry, &inode_list);
 735         if (ret != 0)
 736                 goto out_destroy_imd;
 737
 738         DEBUG("Assigning hard link group IDs");
 739         assign_inode_numbers(&inode_list);
 740         w->image_metadata[w->hdr.image_count - 1].inode_list = inode_list;
 741
 742         ret = xml_add_image(w, name);
 743         if (ret != 0)
 744                 goto out_destroy_imd;
 745
 746         if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_BOOT)
 747                 wimlib_set_boot_idx(w, w->hdr.image_count);
 748         return 0;
 749 out_destroy_imd:
 750         destroy_image_metadata(&w->image_metadata[w->hdr.image_count - 1],
 751                                w->lookup_table);
 752         w->hdr.image_count--;
 753         return ret;
 754 out_free_dentry_tree:
 755         free_dentry_tree(root_dentry, w->lookup_table);
 756 out_free_security_data:
 757         free_security_data(sd);
 758 out_destroy_config:
 759         destroy_capture_config(&config);
 760         return ret;
 761 }