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 the dentry tree and security data for a new image to the image metadata
  43  * array of the WIMStruct.
  44  */
  45 int add_new_dentry_tree(WIMStruct *w, struct wim_dentry *root_dentry,
  46                         struct wim_security_data *sd)
  47 {
  48         struct wim_lookup_table_entry *metadata_lte;
  49         struct wim_image_metadata *imd;
  50         struct wim_image_metadata *new_imd;
  51
  52         wimlib_assert(root_dentry != NULL);
  53
  54         DEBUG("Reallocating image metadata array for image_count = %u",
  55               w->hdr.image_count + 1);
  56         imd = CALLOC((w->hdr.image_count + 1), sizeof(struct wim_image_metadata));
  57
  58         if (!imd) {
  59                 ERROR("Failed to allocate memory for new image metadata array");
  60                 goto err;
  61         }
  62
  63         memcpy(imd, w->image_metadata,
  64                w->hdr.image_count * sizeof(struct wim_image_metadata));
  65
  66         metadata_lte = new_lookup_table_entry();
  67         if (!metadata_lte)
  68                 goto err_free_imd;
  69
  70         metadata_lte->resource_entry.flags = WIM_RESHDR_FLAG_METADATA;
  71         random_hash(metadata_lte->hash);
  72         lookup_table_insert(w->lookup_table, metadata_lte);
  73
  74         new_imd = &imd[w->hdr.image_count];
  75
  76         new_imd->root_dentry    = root_dentry;
  77         new_imd->metadata_lte   = metadata_lte;
  78         new_imd->security_data  = sd;
  79         new_imd->modified       = 1;
  80
  81         FREE(w->image_metadata);
  82         w->image_metadata = imd;
  83         w->hdr.image_count++;
  84         return 0;
  85 err_free_imd:
  86         FREE(imd);
  87 err:
  88         return WIMLIB_ERR_NOMEM;
  89
  90 }
  91
  92
  93 /*
  94  * build_dentry_tree():
  95  *      Recursively builds a tree of WIM dentries from an on-disk directory
  96  *      tree.
  97  *
  98  * @root_ret:   Place to return a pointer to the root of the dentry tree.  Only
  99  *              modified if successful.  Set to NULL if the file or directory was
 100  *              excluded from capture.
 101  *
 102  * @root_disk_path:  The path to the root of the directory tree on disk.
 103  *
 104  * @lookup_table: The lookup table for the WIM file.  For each file added to the
 105  *              dentry tree being built, an entry is added to the lookup table,
 106  *              unless an identical stream is already in the lookup table.
 107  *              These lookup table entries that are added point to the path of
 108  *              the file on disk.
 109  *
 110  * @sd:         Ignored.  (Security data only captured in NTFS mode.)
 111  *
 112  * @capture_config:
 113  *              Configuration for files to be excluded from capture.
 114  *
 115  * @add_flags:  Bitwise or of WIMLIB_ADD_IMAGE_FLAG_*
 116  *
 117  * @extra_arg:  Ignored. (Only used in NTFS mode.)
 118  *
 119  * @return:     0 on success, nonzero on failure.  It is a failure if any of
 120  *              the files cannot be `stat'ed, or if any of the needed
 121  *              directories cannot be opened or read.  Failure to add the files
 122  *              to the WIM may still occur later when trying to actually read
 123  *              the on-disk files during a call to wimlib_write() or
 124  *              wimlib_overwrite().
 125  */
 126 static int build_dentry_tree(struct wim_dentry **root_ret,
 127                              const char *root_disk_path,
 128                              struct wim_lookup_table *lookup_table,
 129                              struct wim_security_data *sd,
 130                              const struct capture_config *config,
 131                              int add_image_flags,
 132                              wimlib_progress_func_t progress_func,
 133                              void *extra_arg)
 134 {
 135         struct stat root_stbuf;
 136         int ret = 0;
 137         int (*stat_fn)(const char *restrict, struct stat *restrict);
 138         struct wim_dentry *root;
 139         const char *filename;
 140         struct wim_inode *inode;
 141
 142         if (exclude_path(root_disk_path, config, true)) {
 143                 if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_ROOT) {
 144                         ERROR("Cannot exclude the root directory from capture");
 145                         return WIMLIB_ERR_INVALID_CAPTURE_CONFIG;
 146                 }
 147                 if ((add_image_flags & WIMLIB_ADD_IMAGE_FLAG_VERBOSE)
 148                     && progress_func)
 149                 {
 150                         union wimlib_progress_info info;
 151                         info.scan.cur_path = root_disk_path;
 152                         info.scan.excluded = true;
 153                         progress_func(WIMLIB_PROGRESS_MSG_SCAN_DENTRY, &info);
 154                 }
 155                 *root_ret = NULL;
 156                 return 0;
 157         }
 158
 159         if ((add_image_flags & WIMLIB_ADD_IMAGE_FLAG_VERBOSE)
 160             && progress_func)
 161         {
 162                 union wimlib_progress_info info;
 163                 info.scan.cur_path = root_disk_path;
 164                 info.scan.excluded = false;
 165                 progress_func(WIMLIB_PROGRESS_MSG_SCAN_DENTRY, &info);
 166         }
 167
 168         if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_DEREFERENCE)
 169                 stat_fn = stat;
 170         else
 171                 stat_fn = lstat;
 172
 173         ret = (*stat_fn)(root_disk_path, &root_stbuf);
 174         if (ret != 0) {
 175                 ERROR_WITH_ERRNO("Failed to stat `%s'", root_disk_path);
 176                 return WIMLIB_ERR_STAT;
 177         }
 178
 179         if ((add_image_flags & WIMLIB_ADD_IMAGE_FLAG_ROOT) &&
 180               !S_ISDIR(root_stbuf.st_mode))
 181         {
 182                 /* Do a dereference-stat in case the root is a symbolic link.
 183                  * This case is allowed, provided that the symbolic link points
 184                  * to a directory. */
 185                 ret = stat(root_disk_path, &root_stbuf);
 186                 if (ret != 0) {
 187                         ERROR_WITH_ERRNO("Failed to stat `%s'", root_disk_path);
 188                         return WIMLIB_ERR_STAT;
 189                 }
 190                 if (!S_ISDIR(root_stbuf.st_mode)) {
 191                         ERROR("`%s' is not a directory", root_disk_path);
 192                         return WIMLIB_ERR_NOTDIR;
 193                 }
 194         }
 195         if (!S_ISREG(root_stbuf.st_mode) && !S_ISDIR(root_stbuf.st_mode)
 196             && !S_ISLNK(root_stbuf.st_mode)) {
 197                 ERROR("`%s' is not a regular file, directory, or symbolic link.",
 198                       root_disk_path);
 199                 return WIMLIB_ERR_SPECIAL_FILE;
 200         }
 201
 202         if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_ROOT)
 203                 filename = "";
 204         else
 205                 filename = path_basename(root_disk_path);
 206
 207         root = new_dentry_with_timeless_inode(filename);
 208         if (!root) {
 209                 if (errno == EILSEQ)
 210                         return WIMLIB_ERR_INVALID_UTF8_STRING;
 211                 else if (errno == ENOMEM)
 212                         return WIMLIB_ERR_NOMEM;
 213                 else
 214                         return WIMLIB_ERR_ICONV_NOT_AVAILABLE;
 215         }
 216
 217         inode = root->d_inode;
 218
 219 #ifdef HAVE_STAT_NANOSECOND_PRECISION
 220         inode->i_creation_time = timespec_to_wim_timestamp(&root_stbuf.st_mtim);
 221         inode->i_last_write_time = timespec_to_wim_timestamp(&root_stbuf.st_mtim);
 222         inode->i_last_access_time = timespec_to_wim_timestamp(&root_stbuf.st_atim);
 223 #else
 224         inode->i_creation_time = unix_timestamp_to_wim(root_stbuf.st_mtime);
 225         inode->i_last_write_time = unix_timestamp_to_wim(root_stbuf.st_mtime);
 226         inode->i_last_access_time = unix_timestamp_to_wim(root_stbuf.st_atime);
 227 #endif
 228         if (sizeof(ino_t) >= 8)
 229                 inode->i_ino = (u64)root_stbuf.st_ino;
 230         else
 231                 inode->i_ino = (u64)root_stbuf.st_ino |
 232                                    ((u64)root_stbuf.st_dev << ((sizeof(ino_t) * 8) & 63));
 233
 234         add_image_flags &= ~WIMLIB_ADD_IMAGE_FLAG_ROOT;
 235         inode->i_resolved = 1;
 236
 237         if (S_ISREG(root_stbuf.st_mode)) { /* Archiving a regular file */
 238
 239                 struct wim_lookup_table_entry *lte;
 240                 u8 hash[SHA1_HASH_SIZE];
 241
 242                 inode->i_attributes = FILE_ATTRIBUTE_NORMAL;
 243
 244                 /* Empty files do not have to have a lookup table entry. */
 245                 if (root_stbuf.st_size == 0)
 246                         goto out;
 247
 248                 /* For each regular file, we must check to see if the file is in
 249                  * the lookup table already; if it is, we increment its refcnt;
 250                  * otherwise, we create a new lookup table entry and insert it.
 251                  * */
 252
 253                 ret = sha1sum(root_disk_path, hash);
 254                 if (ret != 0)
 255                         goto out;
 256
 257                 lte = __lookup_resource(lookup_table, hash);
 258                 if (lte) {
 259                         lte->refcnt++;
 260                         DEBUG("Add lte reference %u for `%s'", lte->refcnt,
 261                               root_disk_path);
 262                 } else {
 263                         char *file_on_disk = STRDUP(root_disk_path);
 264                         if (!file_on_disk) {
 265                                 ERROR("Failed to allocate memory for file path");
 266                                 ret = WIMLIB_ERR_NOMEM;
 267                                 goto out;
 268                         }
 269                         lte = new_lookup_table_entry();
 270                         if (!lte) {
 271                                 FREE(file_on_disk);
 272                                 ret = WIMLIB_ERR_NOMEM;
 273                                 goto out;
 274                         }
 275                         lte->file_on_disk = file_on_disk;
 276                         lte->resource_location = RESOURCE_IN_FILE_ON_DISK;
 277                         lte->resource_entry.original_size = root_stbuf.st_size;
 278                         lte->resource_entry.size = root_stbuf.st_size;
 279                         copy_hash(lte->hash, hash);
 280                         lookup_table_insert(lookup_table, lte);
 281                 }
 282                 root->d_inode->i_lte = lte;
 283         } else if (S_ISDIR(root_stbuf.st_mode)) { /* Archiving a directory */
 284
 285                 inode->i_attributes = FILE_ATTRIBUTE_DIRECTORY;
 286
 287                 DIR *dir;
 288                 struct dirent entry, *result;
 289                 struct wim_dentry *child;
 290
 291                 dir = opendir(root_disk_path);
 292                 if (!dir) {
 293                         ERROR_WITH_ERRNO("Failed to open the directory `%s'",
 294                                          root_disk_path);
 295                         ret = WIMLIB_ERR_OPEN;
 296                         goto out;
 297                 }
 298
 299                 /* Buffer for names of files in directory. */
 300                 size_t len = strlen(root_disk_path);
 301                 char name[len + 1 + FILENAME_MAX + 1];
 302                 memcpy(name, root_disk_path, len);
 303                 name[len] = '/';
 304
 305                 /* Create a dentry for each entry in the directory on disk, and recurse
 306                  * to any subdirectories. */
 307                 while (1) {
 308                         errno = 0;
 309                         ret = readdir_r(dir, &entry, &result);
 310                         if (ret != 0) {
 311                                 ret = WIMLIB_ERR_READ;
 312                                 ERROR_WITH_ERRNO("Error reading the "
 313                                                  "directory `%s'",
 314                                                  root_disk_path);
 315                                 break;
 316                         }
 317                         if (result == NULL)
 318                                 break;
 319                         if (result->d_name[0] == '.' && (result->d_name[1] == '\0'
 320                               || (result->d_name[1] == '.' && result->d_name[2] == '\0')))
 321                                         continue;
 322                         strcpy(name + len + 1, result->d_name);
 323                         ret = build_dentry_tree(&child, name, lookup_table,
 324                                                 NULL, config, add_image_flags,
 325                                                 progress_func, NULL);
 326                         if (ret != 0)
 327                                 break;
 328                         if (child)
 329                                 dentry_add_child(root, child);
 330                 }
 331                 closedir(dir);
 332         } else { /* Archiving a symbolic link */
 333                 inode->i_attributes = FILE_ATTRIBUTE_REPARSE_POINT;
 334                 inode->i_reparse_tag = WIM_IO_REPARSE_TAG_SYMLINK;
 335
 336                 /* The idea here is to call readlink() to get the UNIX target of
 337                  * the symbolic link, then turn the target into a reparse point
 338                  * data buffer that contains a relative or absolute symbolic
 339                  * link (NOT a junction point or *full* path symbolic link with
 340                  * drive letter).
 341                  */
 342
 343                 char deref_name_buf[4096];
 344                 ssize_t deref_name_len;
 345
 346                 deref_name_len = readlink(root_disk_path, deref_name_buf,
 347                                           sizeof(deref_name_buf) - 1);
 348                 if (deref_name_len >= 0) {
 349                         deref_name_buf[deref_name_len] = '\0';
 350                         DEBUG("Read symlink `%s'", deref_name_buf);
 351                         ret = inode_set_symlink(root->d_inode, deref_name_buf,
 352                                                 lookup_table, NULL);
 353                         if (ret == 0) {
 354                                 /*
 355                                  * Unfortunately, Windows seems to have the
 356                                  * concept of "file" symbolic links as being
 357                                  * different from "directory" symbolic links...
 358                                  * so FILE_ATTRIBUTE_DIRECTORY needs to be set
 359                                  * on the symbolic link if the *target* of the
 360                                  * symbolic link is a directory.
 361                                  */
 362                                 struct stat stbuf;
 363                                 if (stat(root_disk_path, &stbuf) == 0 &&
 364                                     S_ISDIR(stbuf.st_mode))
 365                                 {
 366                                         inode->i_attributes |= FILE_ATTRIBUTE_DIRECTORY;
 367                                 }
 368                         }
 369                 } else {
 370                         ERROR_WITH_ERRNO("Failed to read target of "
 371                                          "symbolic link `%s'", root_disk_path);
 372                         ret = WIMLIB_ERR_READLINK;
 373                 }
 374         }
 375 out:
 376         if (ret == 0)
 377                 *root_ret = root;
 378         else
 379                 free_dentry_tree(root, lookup_table);
 380         return ret;
 381 }
 382
 383
 384 enum pattern_type {
 385         NONE = 0,
 386         EXCLUSION_LIST,
 387         EXCLUSION_EXCEPTION,
 388         COMPRESSION_EXCLUSION_LIST,
 389         ALIGNMENT_LIST,
 390 };
 391
 392 /* Default capture configuration file when none is specified. */
 393 static const char *default_config =
 394 "[ExclusionList]\n"
 395 "\\$ntfs.log\n"
 396 "\\hiberfil.sys\n"
 397 "\\pagefile.sys\n"
 398 "\\System Volume Information\n"
 399 "\\RECYCLER\n"
 400 "\\Windows\\CSC\n"
 401 "\n"
 402 "[CompressionExclusionList]\n"
 403 "*.mp3\n"
 404 "*.zip\n"
 405 "*.cab\n"
 406 "\\WINDOWS\\inf\\*.pnf\n";
 407
 408 static void destroy_pattern_list(struct pattern_list *list)
 409 {
 410         FREE(list->pats);
 411 }
 412
 413 static void destroy_capture_config(struct capture_config *config)
 414 {
 415         destroy_pattern_list(&config->exclusion_list);
 416         destroy_pattern_list(&config->exclusion_exception);
 417         destroy_pattern_list(&config->compression_exclusion_list);
 418         destroy_pattern_list(&config->alignment_list);
 419         FREE(config->config_str);
 420         FREE(config->prefix);
 421         memset(config, 0, sizeof(*config));
 422 }
 423
 424 static int pattern_list_add_pattern(struct pattern_list *list,
 425                                     const char *pattern)
 426 {
 427         const char **pats;
 428         if (list->num_pats >= list->num_allocated_pats) {
 429                 pats = REALLOC(list->pats,
 430                                sizeof(list->pats[0]) * (list->num_allocated_pats + 8));
 431                 if (!pats)
 432                         return WIMLIB_ERR_NOMEM;
 433                 list->num_allocated_pats += 8;
 434                 list->pats = pats;
 435         }
 436         list->pats[list->num_pats++] = pattern;
 437         return 0;
 438 }
 439
 440 /* Parses the contents of the image capture configuration file and fills in a
 441  * `struct capture_config'. */
 442 static int init_capture_config(const char *_config_str, size_t config_len,
 443                                const char *_prefix, struct capture_config *config)
 444 {
 445         char *config_str;
 446         char *prefix;
 447         char *p;
 448         char *eol;
 449         char *next_p;
 450         size_t bytes_remaining;
 451         enum pattern_type type = NONE;
 452         int ret;
 453         unsigned long line_no = 0;
 454
 455         DEBUG("config_len = %zu", config_len);
 456         bytes_remaining = config_len;
 457         memset(config, 0, sizeof(*config));
 458         config_str = MALLOC(config_len);
 459         if (!config_str) {
 460                 ERROR("Could not duplicate capture config string");
 461                 return WIMLIB_ERR_NOMEM;
 462         }
 463         prefix = STRDUP(_prefix);
 464         if (!prefix) {
 465                 FREE(config_str);
 466                 return WIMLIB_ERR_NOMEM;
 467         }
 468
 469         memcpy(config_str, _config_str, config_len);
 470         next_p = config_str;
 471         config->config_str = config_str;
 472         config->prefix = prefix;
 473         config->prefix_len = strlen(prefix);
 474         while (bytes_remaining) {
 475                 line_no++;
 476                 p = next_p;
 477                 eol = memchr(p, '\n', bytes_remaining);
 478                 if (!eol) {
 479                         ERROR("Expected end-of-line in capture config file on "
 480                               "line %lu", line_no);
 481                         ret = WIMLIB_ERR_INVALID_CAPTURE_CONFIG;
 482                         goto out_destroy;
 483                 }
 484
 485                 next_p = eol + 1;
 486                 bytes_remaining -= (next_p - p);
 487                 if (eol == p)
 488                         continue;
 489
 490                 if (*(eol - 1) == '\r')
 491                         eol--;
 492                 *eol = '\0';
 493
 494                 /* Translate backslash to forward slash */
 495                 for (char *pp = p; pp != eol; pp++)
 496                         if (*pp == '\\')
 497                                 *pp = '/';
 498
 499                 /* Remove drive letter */
 500                 if (eol - p > 2 && isalpha(*p) && *(p + 1) == ':')
 501                         p += 2;
 502
 503                 ret = 0;
 504                 if (strcmp(p, "[ExclusionList]") == 0)
 505                         type = EXCLUSION_LIST;
 506                 else if (strcmp(p, "[ExclusionException]") == 0)
 507                         type = EXCLUSION_EXCEPTION;
 508                 else if (strcmp(p, "[CompressionExclusionList]") == 0)
 509                         type = COMPRESSION_EXCLUSION_LIST;
 510                 else if (strcmp(p, "[AlignmentList]") == 0)
 511                         type = ALIGNMENT_LIST;
 512                 else if (p[0] == '[' && strrchr(p, ']')) {
 513                         ERROR("Unknown capture configuration section `%s'", p);
 514                         ret = WIMLIB_ERR_INVALID_CAPTURE_CONFIG;
 515                 } else switch (type) {
 516                 case EXCLUSION_LIST:
 517                         DEBUG("Adding pattern \"%s\" to exclusion list", p);
 518                         ret = pattern_list_add_pattern(&config->exclusion_list, p);
 519                         break;
 520                 case EXCLUSION_EXCEPTION:
 521                         DEBUG("Adding pattern \"%s\" to exclusion exception list", p);
 522                         ret = pattern_list_add_pattern(&config->exclusion_exception, p);
 523                         break;
 524                 case COMPRESSION_EXCLUSION_LIST:
 525                         DEBUG("Adding pattern \"%s\" to compression exclusion list", p);
 526                         ret = pattern_list_add_pattern(&config->compression_exclusion_list, p);
 527                         break;
 528                 case ALIGNMENT_LIST:
 529                         DEBUG("Adding pattern \"%s\" to alignment list", p);
 530                         ret = pattern_list_add_pattern(&config->alignment_list, p);
 531                         break;
 532                 default:
 533                         ERROR("Line %lu of capture configuration is not "
 534                               "in a block (such as [ExclusionList])",
 535                               line_no);
 536                         ret = WIMLIB_ERR_INVALID_CAPTURE_CONFIG;
 537                         break;
 538                 }
 539                 if (ret != 0)
 540                         goto out_destroy;
 541         }
 542         return 0;
 543 out_destroy:
 544         destroy_capture_config(config);
 545         return ret;
 546 }
 547
 548 static bool match_pattern(const char *path, const char *path_basename,
 549                           const struct pattern_list *list)
 550 {
 551         for (size_t i = 0; i < list->num_pats; i++) {
 552                 const char *pat = list->pats[i];
 553                 const char *string;
 554                 if (pat[0] == '/')
 555                         /* Absolute path from root of capture */
 556                         string = path;
 557                 else {
 558                         if (strchr(pat, '/'))
 559                                 /* Relative path from root of capture */
 560                                 string = path + 1;
 561                         else
 562                                 /* A file name pattern */
 563                                 string = path_basename;
 564                 }
 565                 if (fnmatch(pat, string, FNM_PATHNAME
 566                         #ifdef FNM_CASEFOLD
 567                                         | FNM_CASEFOLD
 568                         #endif
 569                         ) == 0)
 570                 {
 571                         DEBUG("`%s' matches the pattern \"%s\"",
 572                               string, pat);
 573                         return true;
 574                 }
 575         }
 576         return false;
 577 }
 578
 579 static void print_pattern_list(const struct pattern_list *list)
 580 {
 581         for (size_t i = 0; i < list->num_pats; i++)
 582                 printf("    %s\n", list->pats[i]);
 583 }
 584
 585 static void print_capture_config(const struct capture_config *config)
 586 {
 587         if (config->exclusion_list.num_pats) {
 588                 puts("Files or folders excluded from image capture:");
 589                 print_pattern_list(&config->exclusion_list);
 590                 putchar('\n');
 591         }
 592 }
 593
 594 /* Return true if the image capture configuration file indicates we should
 595  * exclude the filename @path from capture.
 596  *
 597  * If @exclude_prefix is %true, the part of the path up and including the name
 598  * of the directory being captured is not included in the path for matching
 599  * purposes.  This allows, for example, a pattern like /hiberfil.sys to match a
 600  * file /mnt/windows7/hiberfil.sys if we are capturing the /mnt/windows7
 601  * directory.
 602  */
 603 bool exclude_path(const char *path, const struct capture_config *config,
 604                   bool exclude_prefix)
 605 {
 606         const char *basename = path_basename(path);
 607         if (exclude_prefix) {
 608                 wimlib_assert(strlen(path) >= config->prefix_len);
 609                 if (memcmp(config->prefix, path, config->prefix_len) == 0
 610                      && path[config->prefix_len] == '/')
 611                         path += config->prefix_len;
 612         }
 613         return match_pattern(path, basename, &config->exclusion_list) &&
 614                 !match_pattern(path, basename, &config->exclusion_exception);
 615
 616 }
 617
 618 WIMLIBAPI int wimlib_add_image(WIMStruct *w, const char *source,
 619                                const char *name, const char *config_str,
 620                                size_t config_len, int add_image_flags,
 621                                wimlib_progress_func_t progress_func)
 622 {
 623         int (*capture_tree)(struct wim_dentry **, const char *,
 624                             struct wim_lookup_table *,
 625                             struct wim_security_data *,
 626                             const struct capture_config *,
 627                             int, wimlib_progress_func_t, void *);
 628         void *extra_arg;
 629
 630         struct wim_dentry *root_dentry = NULL;
 631         struct wim_security_data *sd;
 632         struct capture_config config;
 633         struct wim_image_metadata *imd;
 634         int ret;
 635
 636         if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_NTFS) {
 637 #ifdef WITH_NTFS_3G
 638                 if (add_image_flags & (WIMLIB_ADD_IMAGE_FLAG_DEREFERENCE)) {
 639                         ERROR("Cannot dereference files when capturing directly from NTFS");
 640                         return WIMLIB_ERR_INVALID_PARAM;
 641                 }
 642                 capture_tree = build_dentry_tree_ntfs;
 643                 extra_arg = &w->ntfs_vol;
 644 #else
 645                 ERROR("wimlib was compiled without support for NTFS-3g, so\n"
 646                       "        cannot capture a WIM image directly from a NTFS volume!");
 647                 return WIMLIB_ERR_UNSUPPORTED;
 648 #endif
 649         } else {
 650                 capture_tree = build_dentry_tree;
 651                 extra_arg = NULL;
 652         }
 653
 654         DEBUG("Adding dentry tree from directory or NTFS volume `%s'.", source);
 655
 656         if (!name || !*name) {
 657                 ERROR("Must specify a non-empty string for the image name");
 658                 return WIMLIB_ERR_INVALID_PARAM;
 659         }
 660         if (!source || !*source) {
 661                 ERROR("Must specify the name of a directory or NTFS volume");
 662                 return WIMLIB_ERR_INVALID_PARAM;
 663         }
 664
 665         if (w->hdr.total_parts != 1) {
 666                 ERROR("Cannot add an image to a split WIM");
 667                 return WIMLIB_ERR_SPLIT_UNSUPPORTED;
 668         }
 669
 670         if (wimlib_image_name_in_use(w, name)) {
 671                 ERROR("There is already an image named \"%s\" in `%s'",
 672                       name, w->filename);
 673                 return WIMLIB_ERR_IMAGE_NAME_COLLISION;
 674         }
 675
 676         DEBUG("Initializing capture configuration");
 677         if (!config_str) {
 678                 DEBUG("Using default capture configuration");
 679                 config_str = default_config;
 680                 config_len = strlen(default_config);
 681         }
 682         ret = init_capture_config(config_str, config_len, source, &config);
 683         if (ret != 0)
 684                 return ret;
 685         print_capture_config(&config);
 686
 687         DEBUG("Allocating security data");
 688
 689         sd = CALLOC(1, sizeof(struct wim_security_data));
 690         if (!sd) {
 691                 ret = WIMLIB_ERR_NOMEM;
 692                 goto out_destroy_config;
 693         }
 694         sd->total_length = 8;
 695         sd->refcnt = 1;
 696
 697         if (progress_func) {
 698                 union wimlib_progress_info progress;
 699                 progress.scan.source = source;
 700                 progress_func(WIMLIB_PROGRESS_MSG_SCAN_BEGIN, &progress);
 701         }
 702
 703         DEBUG("Building dentry tree.");
 704         ret = (*capture_tree)(&root_dentry, source, w->lookup_table, sd,
 705                               &config, add_image_flags | WIMLIB_ADD_IMAGE_FLAG_ROOT,
 706                               progress_func, extra_arg);
 707         destroy_capture_config(&config);
 708
 709         if (ret != 0) {
 710                 ERROR("Failed to build dentry tree for `%s'", source);
 711                 goto out_free_security_data;
 712         }
 713
 714         if (progress_func) {
 715                 union wimlib_progress_info progress;
 716                 progress.scan.source = source;
 717                 progress_func(WIMLIB_PROGRESS_MSG_SCAN_END, &progress);
 718         }
 719
 720         DEBUG("Calculating full paths of dentries.");
 721         ret = for_dentry_in_tree(root_dentry, calculate_dentry_full_path, NULL);
 722         if (ret != 0)
 723                 goto out_free_dentry_tree;
 724
 725         ret = add_new_dentry_tree(w, root_dentry, sd);
 726         if (ret != 0)
 727                 goto out_free_dentry_tree;
 728
 729         imd = &w->image_metadata[w->hdr.image_count - 1];
 730
 731         ret = dentry_tree_fix_inodes(root_dentry, &imd->inode_list);
 732         if (ret != 0)
 733                 goto out_destroy_imd;
 734
 735         DEBUG("Assigning hard link group IDs");
 736         assign_inode_numbers(&imd->inode_list);
 737
 738         ret = xml_add_image(w, name);
 739         if (ret != 0)
 740                 goto out_destroy_imd;
 741
 742         if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_BOOT)
 743                 wimlib_set_boot_idx(w, w->hdr.image_count);
 744         return 0;
 745 out_destroy_imd:
 746         destroy_image_metadata(&w->image_metadata[w->hdr.image_count - 1],
 747                                w->lookup_table);
 748         w->hdr.image_count--;
 749         return ret;
 750 out_free_dentry_tree:
 751         free_dentry_tree(root_dentry, w->lookup_table);
 752 out_free_security_data:
 753         free_security_data(sd);
 754 out_destroy_config:
 755         destroy_capture_config(&config);
 756         return ret;
 757 }