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       = true;
  91
  92         FREE(w->image_metadata);
  93         w->image_metadata       = imd;
  94         w->hdr.image_count++;
  95
  96         /* Change the current image to the new one.  There should not be any
  97          * ways for this to fail, since the image is valid and the dentry tree
  98          * is already in memory. */
  99         ret = select_wim_image(w, w->hdr.image_count);
 100         wimlib_assert(ret == 0);
 101         return ret;
 102 err_free_imd:
 103         FREE(imd);
 104 err:
 105         return WIMLIB_ERR_NOMEM;
 106
 107 }
 108
 109
 110 /*
 111  * Recursively builds a dentry tree from a directory tree on disk, outside the
 112  * WIM file.
 113  *
 114  * @root_ret:   Place to return a pointer to the root of the dentry tree.  Only
 115  *              modified if successful.  NULL if the file or directory was
 116  *              excluded from capture.
 117  *
 118  * @root_disk_path:  The path to the root of the directory tree on disk.
 119  *
 120  * @lookup_table: The lookup table for the WIM file.  For each file added to the
 121  *              dentry tree being built, an entry is added to the lookup table,
 122  *              unless an identical stream is already in the lookup table.
 123  *              These lookup table entries that are added point to the path of
 124  *              the file on disk.
 125  *
 126  * @sd:         Ignored.  (Security data only captured in NTFS mode.)
 127  *
 128  * @capture_config:
 129  *              Configuration for files to be excluded from capture.
 130  *
 131  * @add_flags:  Bitwise or of WIMLIB_ADD_IMAGE_FLAG_*
 132  *
 133  * @extra_arg:  Ignored. (Only used in NTFS mode.)
 134  *
 135  * @return:     0 on success, nonzero on failure.  It is a failure if any of
 136  *              the files cannot be `stat'ed, or if any of the needed
 137  *              directories cannot be opened or read.  Failure to add the files
 138  *              to the WIM may still occur later when trying to actually read
 139  *              the on-disk files during a call to wimlib_write() or
 140  *              wimlib_overwrite().
 141  */
 142 static int build_dentry_tree(struct dentry **root_ret,
 143                              const char *root_disk_path,
 144                              struct lookup_table *lookup_table,
 145                              struct wim_security_data *sd,
 146                              const struct capture_config *config,
 147                              int add_image_flags,
 148                              wimlib_progress_func_t progress_func,
 149                              void *extra_arg)
 150 {
 151         struct stat root_stbuf;
 152         int ret = 0;
 153         int (*stat_fn)(const char *restrict, struct stat *restrict);
 154         struct dentry *root;
 155         const char *filename;
 156         struct inode *inode;
 157
 158         if (exclude_path(root_disk_path, config, true)) {
 159                 if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_ROOT) {
 160                         ERROR("Cannot exclude the root directory from capture");
 161                         return WIMLIB_ERR_INVALID_CAPTURE_CONFIG;
 162                 }
 163                 if ((add_image_flags & WIMLIB_ADD_IMAGE_FLAG_VERBOSE)
 164                     && progress_func)
 165                 {
 166                         union wimlib_progress_info info;
 167                         info.scan.cur_path = root_disk_path;
 168                         info.scan.excluded = true;
 169                         progress_func(WIMLIB_PROGRESS_MSG_SCAN_DENTRY, &info);
 170                 }
 171                 *root_ret = NULL;
 172                 return 0;
 173         }
 174
 175         if ((add_image_flags & WIMLIB_ADD_IMAGE_FLAG_VERBOSE)
 176             && progress_func)
 177         {
 178                 union wimlib_progress_info info;
 179                 info.scan.cur_path = root_disk_path;
 180                 info.scan.excluded = false;
 181                 progress_func(WIMLIB_PROGRESS_MSG_SCAN_DENTRY, &info);
 182         }
 183
 184         if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_DEREFERENCE)
 185                 stat_fn = stat;
 186         else
 187                 stat_fn = lstat;
 188
 189         ret = (*stat_fn)(root_disk_path, &root_stbuf);
 190         if (ret != 0) {
 191                 ERROR_WITH_ERRNO("Failed to stat `%s'", root_disk_path);
 192                 return WIMLIB_ERR_STAT;
 193         }
 194
 195         if ((add_image_flags & WIMLIB_ADD_IMAGE_FLAG_ROOT) &&
 196               !S_ISDIR(root_stbuf.st_mode))
 197         {
 198                 /* Do a dereference-stat in case the root is a symbolic link.
 199                  * This case is allowed, provided that the symbolic link points
 200                  * to a directory. */
 201                 ret = stat(root_disk_path, &root_stbuf);
 202                 if (ret != 0) {
 203                         ERROR_WITH_ERRNO("Failed to stat `%s'", root_disk_path);
 204                         return WIMLIB_ERR_STAT;
 205                 }
 206                 if (!S_ISDIR(root_stbuf.st_mode)) {
 207                         ERROR("`%s' is not a directory", root_disk_path);
 208                         return WIMLIB_ERR_NOTDIR;
 209                 }
 210         }
 211         if (!S_ISREG(root_stbuf.st_mode) && !S_ISDIR(root_stbuf.st_mode)
 212             && !S_ISLNK(root_stbuf.st_mode)) {
 213                 ERROR("`%s' is not a regular file, directory, or symbolic link.",
 214                       root_disk_path);
 215                 return WIMLIB_ERR_SPECIAL_FILE;
 216         }
 217
 218         if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_ROOT)
 219                 filename = "";
 220         else
 221                 filename = path_basename(root_disk_path);
 222
 223         root = new_dentry_with_timeless_inode(filename);
 224         if (!root)
 225                 return WIMLIB_ERR_NOMEM;
 226
 227         inode = root->d_inode;
 228
 229 #ifdef HAVE_STAT_NANOSECOND_PRECISION
 230         inode->creation_time = timespec_to_wim_timestamp(&root_stbuf.st_mtim);
 231         inode->last_write_time = timespec_to_wim_timestamp(&root_stbuf.st_mtim);
 232         inode->last_access_time = timespec_to_wim_timestamp(&root_stbuf.st_atim);
 233 #else
 234         inode->creation_time = unix_timestamp_to_wim(root_stbuf.st_mtime);
 235         inode->last_write_time = unix_timestamp_to_wim(root_stbuf.st_mtime);
 236         inode->last_access_time = unix_timestamp_to_wim(root_stbuf.st_atime);
 237 #endif
 238         if (sizeof(ino_t) >= 8)
 239                 inode->ino = (u64)root_stbuf.st_ino;
 240         else
 241                 inode->ino = (u64)root_stbuf.st_ino |
 242                                    ((u64)root_stbuf.st_dev << ((sizeof(ino_t) * 8) & 63));
 243
 244         add_image_flags &= ~WIMLIB_ADD_IMAGE_FLAG_ROOT;
 245         inode->resolved = 1;
 246
 247         if (S_ISREG(root_stbuf.st_mode)) { /* Archiving a regular file */
 248
 249                 struct lookup_table_entry *lte;
 250                 u8 hash[SHA1_HASH_SIZE];
 251
 252                 inode->attributes = FILE_ATTRIBUTE_NORMAL;
 253
 254                 /* Empty files do not have to have a lookup table entry. */
 255                 if (root_stbuf.st_size == 0)
 256                         goto out;
 257
 258                 /* For each regular file, we must check to see if the file is in
 259                  * the lookup table already; if it is, we increment its refcnt;
 260                  * otherwise, we create a new lookup table entry and insert it.
 261                  * */
 262
 263                 ret = sha1sum(root_disk_path, hash);
 264                 if (ret != 0)
 265                         goto out;
 266
 267                 lte = __lookup_resource(lookup_table, hash);
 268                 if (lte) {
 269                         lte->refcnt++;
 270                         DEBUG("Add lte reference %u for `%s'", lte->refcnt,
 271                               root_disk_path);
 272                 } else {
 273                         char *file_on_disk = STRDUP(root_disk_path);
 274                         if (!file_on_disk) {
 275                                 ERROR("Failed to allocate memory for file path");
 276                                 ret = WIMLIB_ERR_NOMEM;
 277                                 goto out;
 278                         }
 279                         lte = new_lookup_table_entry();
 280                         if (!lte) {
 281                                 FREE(file_on_disk);
 282                                 ret = WIMLIB_ERR_NOMEM;
 283                                 goto out;
 284                         }
 285                         lte->file_on_disk = file_on_disk;
 286                         lte->resource_location = RESOURCE_IN_FILE_ON_DISK;
 287                         lte->resource_entry.original_size = root_stbuf.st_size;
 288                         lte->resource_entry.size = root_stbuf.st_size;
 289                         copy_hash(lte->hash, hash);
 290                         lookup_table_insert(lookup_table, lte);
 291                 }
 292                 root->d_inode->lte = lte;
 293         } else if (S_ISDIR(root_stbuf.st_mode)) { /* Archiving a directory */
 294
 295                 inode->attributes = FILE_ATTRIBUTE_DIRECTORY;
 296
 297                 DIR *dir;
 298                 struct dirent entry, *result;
 299                 struct dentry *child;
 300
 301                 dir = opendir(root_disk_path);
 302                 if (!dir) {
 303                         ERROR_WITH_ERRNO("Failed to open the directory `%s'",
 304                                          root_disk_path);
 305                         ret = WIMLIB_ERR_OPEN;
 306                         goto out;
 307                 }
 308
 309                 /* Buffer for names of files in directory. */
 310                 size_t len = strlen(root_disk_path);
 311                 char name[len + 1 + FILENAME_MAX + 1];
 312                 memcpy(name, root_disk_path, len);
 313                 name[len] = '/';
 314
 315                 /* Create a dentry for each entry in the directory on disk, and recurse
 316                  * to any subdirectories. */
 317                 while (1) {
 318                         errno = 0;
 319                         ret = readdir_r(dir, &entry, &result);
 320                         if (ret != 0) {
 321                                 ret = WIMLIB_ERR_READ;
 322                                 ERROR_WITH_ERRNO("Error reading the "
 323                                                  "directory `%s'",
 324                                                  root_disk_path);
 325                                 break;
 326                         }
 327                         if (result == NULL)
 328                                 break;
 329                         if (result->d_name[0] == '.' && (result->d_name[1] == '\0'
 330                               || (result->d_name[1] == '.' && result->d_name[2] == '\0')))
 331                                         continue;
 332                         strcpy(name + len + 1, result->d_name);
 333                         ret = build_dentry_tree(&child, name, lookup_table,
 334                                                 NULL, config, add_image_flags,
 335                                                 progress_func, NULL);
 336                         if (ret != 0)
 337                                 break;
 338                         if (child)
 339                                 dentry_add_child(root, child);
 340                 }
 341                 closedir(dir);
 342         } else { /* Archiving a symbolic link */
 343                 inode->attributes = FILE_ATTRIBUTE_REPARSE_POINT;
 344                 inode->reparse_tag = WIM_IO_REPARSE_TAG_SYMLINK;
 345
 346                 /* The idea here is to call readlink() to get the UNIX target of
 347                  * the symbolic link, then turn the target into a reparse point
 348                  * data buffer that contains a relative or absolute symbolic
 349                  * link (NOT a junction point or *full* path symbolic link with
 350                  * drive letter).
 351                  */
 352
 353                 char deref_name_buf[4096];
 354                 ssize_t deref_name_len;
 355
 356                 deref_name_len = readlink(root_disk_path, deref_name_buf,
 357                                           sizeof(deref_name_buf) - 1);
 358                 if (deref_name_len >= 0) {
 359                         deref_name_buf[deref_name_len] = '\0';
 360                         DEBUG("Read symlink `%s'", deref_name_buf);
 361                         ret = inode_set_symlink(root->d_inode, deref_name_buf,
 362                                                 lookup_table, NULL);
 363                         if (ret == 0) {
 364                                 /*
 365                                  * Unfortunately, Windows seems to have the
 366                                  * concept of "file" symbolic links as being
 367                                  * different from "directory" symbolic links...
 368                                  * so FILE_ATTRIBUTE_DIRECTORY needs to be set
 369                                  * on the symbolic link if the *target* of the
 370                                  * symbolic link is a directory.
 371                                  */
 372                                 struct stat stbuf;
 373                                 if (stat(root_disk_path, &stbuf) == 0 &&
 374                                     S_ISDIR(stbuf.st_mode))
 375                                 {
 376                                         inode->attributes |= FILE_ATTRIBUTE_DIRECTORY;
 377                                 }
 378                         }
 379                 } else {
 380                         ERROR_WITH_ERRNO("Failed to read target of "
 381                                          "symbolic link `%s'", root_disk_path);
 382                         ret = WIMLIB_ERR_READLINK;
 383                 }
 384         }
 385 out:
 386         if (ret == 0)
 387                 *root_ret = root;
 388         else
 389                 free_dentry_tree(root, lookup_table);
 390         return ret;
 391 }
 392
 393
 394 enum pattern_type {
 395         NONE = 0,
 396         EXCLUSION_LIST,
 397         EXCLUSION_EXCEPTION,
 398         COMPRESSION_EXCLUSION_LIST,
 399         ALIGNMENT_LIST,
 400 };
 401
 402 /* Default capture configuration file when none is specified. */
 403 static const char *default_config =
 404 "[ExclusionList]\n"
 405 "\\$ntfs.log\n"
 406 "\\hiberfil.sys\n"
 407 "\\pagefile.sys\n"
 408 "\\System Volume Information\n"
 409 "\\RECYCLER\n"
 410 "\\Windows\\CSC\n"
 411 "\n"
 412 "[CompressionExclusionList]\n"
 413 "*.mp3\n"
 414 "*.zip\n"
 415 "*.cab\n"
 416 "\\WINDOWS\\inf\\*.pnf\n";
 417
 418 static void destroy_pattern_list(struct pattern_list *list)
 419 {
 420         FREE(list->pats);
 421 }
 422
 423 static void destroy_capture_config(struct capture_config *config)
 424 {
 425         destroy_pattern_list(&config->exclusion_list);
 426         destroy_pattern_list(&config->exclusion_exception);
 427         destroy_pattern_list(&config->compression_exclusion_list);
 428         destroy_pattern_list(&config->alignment_list);
 429         FREE(config->config_str);
 430         FREE(config->prefix);
 431         memset(config, 0, sizeof(*config));
 432 }
 433
 434 static int pattern_list_add_pattern(struct pattern_list *list,
 435                                     const char *pattern)
 436 {
 437         const char **pats;
 438         if (list->num_pats >= list->num_allocated_pats) {
 439                 pats = REALLOC(list->pats,
 440                                sizeof(list->pats[0]) * (list->num_allocated_pats + 8));
 441                 if (!pats)
 442                         return WIMLIB_ERR_NOMEM;
 443                 list->num_allocated_pats += 8;
 444                 list->pats = pats;
 445         }
 446         list->pats[list->num_pats++] = pattern;
 447         return 0;
 448 }
 449
 450 /* Parses the contents of the image capture configuration file and fills in a
 451  * `struct capture_config'. */
 452 static int init_capture_config(const char *_config_str, size_t config_len,
 453                                const char *_prefix, struct capture_config *config)
 454 {
 455         char *config_str;
 456         char *prefix;
 457         char *p;
 458         char *eol;
 459         char *next_p;
 460         size_t bytes_remaining;
 461         enum pattern_type type = NONE;
 462         int ret;
 463         unsigned long line_no = 0;
 464
 465         DEBUG("config_len = %zu", config_len);
 466         bytes_remaining = config_len;
 467         memset(config, 0, sizeof(*config));
 468         config_str = MALLOC(config_len);
 469         if (!config_str) {
 470                 ERROR("Could not duplicate capture config string");
 471                 return WIMLIB_ERR_NOMEM;
 472         }
 473         prefix = STRDUP(_prefix);
 474         if (!prefix) {
 475                 FREE(config_str);
 476                 return WIMLIB_ERR_NOMEM;
 477         }
 478
 479         memcpy(config_str, _config_str, config_len);
 480         next_p = config_str;
 481         config->config_str = config_str;
 482         config->prefix = prefix;
 483         config->prefix_len = strlen(prefix);
 484         while (bytes_remaining) {
 485                 line_no++;
 486                 p = next_p;
 487                 eol = memchr(p, '\n', bytes_remaining);
 488                 if (!eol) {
 489                         ERROR("Expected end-of-line in capture config file on "
 490                               "line %lu", line_no);
 491                         ret = WIMLIB_ERR_INVALID_CAPTURE_CONFIG;
 492                         goto out_destroy;
 493                 }
 494
 495                 next_p = eol + 1;
 496                 bytes_remaining -= (next_p - p);
 497                 if (eol == p)
 498                         continue;
 499
 500                 if (*(eol - 1) == '\r')
 501                         eol--;
 502                 *eol = '\0';
 503
 504                 /* Translate backslash to forward slash */
 505                 for (char *pp = p; pp != eol; pp++)
 506                         if (*pp == '\\')
 507                                 *pp = '/';
 508
 509                 /* Remove drive letter */
 510                 if (eol - p > 2 && isalpha(*p) && *(p + 1) == ':')
 511                         p += 2;
 512
 513                 ret = 0;
 514                 if (strcmp(p, "[ExclusionList]") == 0)
 515                         type = EXCLUSION_LIST;
 516                 else if (strcmp(p, "[ExclusionException]") == 0)
 517                         type = EXCLUSION_EXCEPTION;
 518                 else if (strcmp(p, "[CompressionExclusionList]") == 0)
 519                         type = COMPRESSION_EXCLUSION_LIST;
 520                 else if (strcmp(p, "[AlignmentList]") == 0)
 521                         type = ALIGNMENT_LIST;
 522                 else if (p[0] == '[' && strrchr(p, ']')) {
 523                         ERROR("Unknown capture configuration section `%s'", p);
 524                         ret = WIMLIB_ERR_INVALID_CAPTURE_CONFIG;
 525                 } else switch (type) {
 526                 case EXCLUSION_LIST:
 527                         DEBUG("Adding pattern \"%s\" to exclusion list", p);
 528                         ret = pattern_list_add_pattern(&config->exclusion_list, p);
 529                         break;
 530                 case EXCLUSION_EXCEPTION:
 531                         DEBUG("Adding pattern \"%s\" to exclusion exception list", p);
 532                         ret = pattern_list_add_pattern(&config->exclusion_exception, p);
 533                         break;
 534                 case COMPRESSION_EXCLUSION_LIST:
 535                         DEBUG("Adding pattern \"%s\" to compression exclusion list", p);
 536                         ret = pattern_list_add_pattern(&config->compression_exclusion_list, p);
 537                         break;
 538                 case ALIGNMENT_LIST:
 539                         DEBUG("Adding pattern \"%s\" to alignment list", p);
 540                         ret = pattern_list_add_pattern(&config->alignment_list, p);
 541                         break;
 542                 default:
 543                         ERROR("Line %lu of capture configuration is not "
 544                               "in a block (such as [ExclusionList])",
 545                               line_no);
 546                         ret = WIMLIB_ERR_INVALID_CAPTURE_CONFIG;
 547                         break;
 548                 }
 549                 if (ret != 0)
 550                         goto out_destroy;
 551         }
 552         return 0;
 553 out_destroy:
 554         destroy_capture_config(config);
 555         return ret;
 556 }
 557
 558 static bool match_pattern(const char *path, const char *path_basename,
 559                           const struct pattern_list *list)
 560 {
 561         for (size_t i = 0; i < list->num_pats; i++) {
 562                 const char *pat = list->pats[i];
 563                 const char *string;
 564                 if (pat[0] == '/')
 565                         /* Absolute path from root of capture */
 566                         string = path;
 567                 else {
 568                         if (strchr(pat, '/'))
 569                                 /* Relative path from root of capture */
 570                                 string = path + 1;
 571                         else
 572                                 /* A file name pattern */
 573                                 string = path_basename;
 574                 }
 575                 if (fnmatch(pat, string, FNM_PATHNAME
 576                         #ifdef FNM_CASEFOLD
 577                                         | FNM_CASEFOLD
 578                         #endif
 579                         ) == 0)
 580                 {
 581                         DEBUG("`%s' matches the pattern \"%s\"",
 582                               string, pat);
 583                         return true;
 584                 }
 585         }
 586         return false;
 587 }
 588
 589 static void print_pattern_list(const struct pattern_list *list)
 590 {
 591         for (size_t i = 0; i < list->num_pats; i++)
 592                 printf("    %s\n", list->pats[i]);
 593 }
 594
 595 static void print_capture_config(const struct capture_config *config)
 596 {
 597         if (config->exclusion_list.num_pats) {
 598                 puts("Files or folders excluded from image capture:");
 599                 print_pattern_list(&config->exclusion_list);
 600                 putchar('\n');
 601         }
 602 }
 603
 604 /* Return true if the image capture configuration file indicates we should
 605  * exclude the filename @path from capture.
 606  *
 607  * If @exclude_prefix is %true, the part of the path up and including the name
 608  * of the directory being captured is not included in the path for matching
 609  * purposes.  This allows, for example, a pattern like /hiberfil.sys to match a
 610  * file /mnt/windows7/hiberfil.sys if we are capturing the /mnt/windows7
 611  * directory.
 612  */
 613 bool exclude_path(const char *path, const struct capture_config *config,
 614                   bool exclude_prefix)
 615 {
 616         const char *basename = path_basename(path);
 617         if (exclude_prefix) {
 618                 wimlib_assert(strlen(path) >= config->prefix_len);
 619                 if (memcmp(config->prefix, path, config->prefix_len) == 0
 620                      && path[config->prefix_len] == '/')
 621                         path += config->prefix_len;
 622         }
 623         return match_pattern(path, basename, &config->exclusion_list) &&
 624                 !match_pattern(path, basename, &config->exclusion_exception);
 625
 626 }
 627
 628 WIMLIBAPI int wimlib_add_image(WIMStruct *w, const char *source,
 629                                const char *name, const char *config_str,
 630                                size_t config_len, int add_image_flags,
 631                                wimlib_progress_func_t progress_func)
 632 {
 633         int (*capture_tree)(struct dentry **, const char *,
 634                             struct lookup_table *,
 635                             struct wim_security_data *,
 636                             const struct capture_config *,
 637                             int, wimlib_progress_func_t, void *);
 638         void *extra_arg;
 639
 640         struct dentry *root_dentry = NULL;
 641         struct wim_security_data *sd;
 642         struct capture_config config;
 643         struct inode_table inode_tab;
 644         struct hlist_head inode_list;
 645         int ret;
 646
 647         if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_NTFS) {
 648 #ifdef WITH_NTFS_3G
 649                 if (add_image_flags & (WIMLIB_ADD_IMAGE_FLAG_DEREFERENCE)) {
 650                         ERROR("Cannot dereference files when capturing directly from NTFS");
 651                         return WIMLIB_ERR_INVALID_PARAM;
 652                 }
 653                 capture_tree = build_dentry_tree_ntfs;
 654                 extra_arg = &w->ntfs_vol;
 655 #else
 656                 ERROR("wimlib was compiled without support for NTFS-3g, so\n"
 657                       "        cannot capture a WIM image directly from a NTFS volume!");
 658                 return WIMLIB_ERR_UNSUPPORTED;
 659 #endif
 660         } else {
 661                 capture_tree = build_dentry_tree;
 662                 extra_arg = NULL;
 663         }
 664
 665         DEBUG("Adding dentry tree from directory or NTFS volume `%s'.", source);
 666
 667         if (!name || !*name) {
 668                 ERROR("Must specify a non-empty string for the image name");
 669                 return WIMLIB_ERR_INVALID_PARAM;
 670         }
 671         if (!source || !*source) {
 672                 ERROR("Must specify the name of a directory or NTFS volume");
 673                 return WIMLIB_ERR_INVALID_PARAM;
 674         }
 675
 676         if (w->hdr.total_parts != 1) {
 677                 ERROR("Cannot add an image to a split WIM");
 678                 return WIMLIB_ERR_SPLIT_UNSUPPORTED;
 679         }
 680
 681         if (wimlib_image_name_in_use(w, name)) {
 682                 ERROR("There is already an image named \"%s\" in `%s'",
 683                       name, w->filename);
 684                 return WIMLIB_ERR_IMAGE_NAME_COLLISION;
 685         }
 686
 687         DEBUG("Initializing capture configuration");
 688         if (!config_str) {
 689                 DEBUG("Using default capture configuration");
 690                 config_str = default_config;
 691                 config_len = strlen(default_config);
 692         }
 693         ret = init_capture_config(config_str, config_len, source, &config);
 694         if (ret != 0)
 695                 return ret;
 696         print_capture_config(&config);
 697
 698         DEBUG("Allocating security data");
 699
 700         sd = CALLOC(1, sizeof(struct wim_security_data));
 701         if (!sd) {
 702                 ret = WIMLIB_ERR_NOMEM;
 703                 goto out_destroy_config;
 704         }
 705         sd->total_length = 8;
 706         sd->refcnt = 1;
 707
 708         if (progress_func) {
 709                 union wimlib_progress_info progress;
 710                 progress.scan.source = source;
 711                 progress_func(WIMLIB_PROGRESS_MSG_SCAN_BEGIN, &progress);
 712         }
 713
 714         DEBUG("Building dentry tree.");
 715         ret = (*capture_tree)(&root_dentry, source, w->lookup_table, sd,
 716                               &config, add_image_flags | WIMLIB_ADD_IMAGE_FLAG_ROOT,
 717                               progress_func, extra_arg);
 718         destroy_capture_config(&config);
 719
 720         if (ret != 0) {
 721                 ERROR("Failed to build dentry tree for `%s'", source);
 722                 goto out_free_security_data;
 723         }
 724
 725         if (progress_func) {
 726                 union wimlib_progress_info progress;
 727                 progress.scan.source = source;
 728                 progress_func(WIMLIB_PROGRESS_MSG_SCAN_END, &progress);
 729         }
 730
 731         DEBUG("Calculating full paths of dentries.");
 732         ret = for_dentry_in_tree(root_dentry, calculate_dentry_full_path, NULL);
 733         if (ret != 0)
 734                 goto out_free_dentry_tree;
 735
 736         ret = add_new_dentry_tree(w, root_dentry, sd);
 737         if (ret != 0)
 738                 goto out_free_dentry_tree;
 739
 740         DEBUG("Inserting dentries into inode table");
 741         ret = init_inode_table(&inode_tab, 9001);
 742         if (ret != 0)
 743                 goto out_destroy_imd;
 744
 745         for_dentry_in_tree(root_dentry, inode_table_insert, &inode_tab);
 746
 747         DEBUG("Cleaning up the hard link groups");
 748         ret = fix_inodes(&inode_tab, &inode_list);
 749         destroy_inode_table(&inode_tab);
 750         if (ret != 0)
 751                 goto out_destroy_imd;
 752
 753         DEBUG("Assigning hard link group IDs");
 754         assign_inode_numbers(&inode_list);
 755         w->image_metadata[w->hdr.image_count - 1].inode_list = inode_list;
 756
 757         ret = xml_add_image(w, name);
 758         if (ret != 0)
 759                 goto out_destroy_imd;
 760
 761         if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_BOOT)
 762                 wimlib_set_boot_idx(w, w->hdr.image_count);
 763         return 0;
 764 out_destroy_imd:
 765         destroy_image_metadata(&w->image_metadata[w->hdr.image_count - 1],
 766                                w->lookup_table);
 767         w->hdr.image_count--;
 768         return ret;
 769 out_free_dentry_tree:
 770         free_dentry_tree(root_dentry, w->lookup_table);
 771 out_free_security_data:
 772         free_security_data(sd);
 773 out_destroy_config:
 774         destroy_capture_config(&config);
 775         return ret;
 776 }