/* * add_image.c */ /* * Copyright (C) 2012, 2013 Eric Biggers * * This file is part of wimlib, a library for working with WIM files. * * wimlib is free software; you can redistribute it and/or modify it under the * terms of the GNU General Public License as published by the Free * Software Foundation; either version 3 of the License, or (at your option) * any later version. * * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR * A PARTICULAR PURPOSE. See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License * along with wimlib; if not, see http://www.gnu.org/licenses/. */ #include "config.h" #ifdef __WIN32__ # include "win32.h" #else # include # include # include # include "timestamp.h" #endif #include "wimlib_internal.h" #include "dentry.h" #include "lookup_table.h" #include "xml.h" #include #include #include #include #include #ifdef HAVE_ALLOCA_H # include #endif /* * Adds the dentry tree and security data for a new image to the image metadata * array of the WIMStruct. */ int add_new_dentry_tree(WIMStruct *w, struct wim_dentry *root_dentry, struct wim_security_data *sd) { struct wim_lookup_table_entry *metadata_lte; struct wim_image_metadata *imd; struct wim_image_metadata *new_imd; wimlib_assert(root_dentry != NULL); DEBUG("Reallocating image metadata array for image_count = %u", w->hdr.image_count + 1); imd = CALLOC((w->hdr.image_count + 1), sizeof(struct wim_image_metadata)); if (!imd) { ERROR("Failed to allocate memory for new image metadata array"); goto err; } memcpy(imd, w->image_metadata, w->hdr.image_count * sizeof(struct wim_image_metadata)); metadata_lte = new_lookup_table_entry(); if (!metadata_lte) goto err_free_imd; metadata_lte->resource_entry.flags = WIM_RESHDR_FLAG_METADATA; random_hash(metadata_lte->hash); lookup_table_insert(w->lookup_table, metadata_lte); new_imd = &imd[w->hdr.image_count]; new_imd->root_dentry = root_dentry; new_imd->metadata_lte = metadata_lte; new_imd->security_data = sd; new_imd->modified = 1; FREE(w->image_metadata); w->image_metadata = imd; w->hdr.image_count++; return 0; err_free_imd: FREE(imd); err: return WIMLIB_ERR_NOMEM; } #ifndef __WIN32__ /* * build_dentry_tree(): * Recursively builds a tree of WIM dentries from an on-disk directory * tree. * * @root_ret: Place to return a pointer to the root of the dentry tree. Only * modified if successful. Set to NULL if the file or directory was * excluded from capture. * * @root_disk_path: The path to the root of the directory tree on disk. * * @lookup_table: The lookup table for the WIM file. For each file added to the * dentry tree being built, an entry is added to the lookup table, * unless an identical stream is already in the lookup table. * These lookup table entries that are added point to the path of * the file on disk. * * @sd: Ignored. (Security data only captured in NTFS mode.) * * @capture_config: * Configuration for files to be excluded from capture. * * @add_flags: Bitwise or of WIMLIB_ADD_IMAGE_FLAG_* * * @extra_arg: Ignored in UNIX builds; used to pass sd_set pointer in Windows * builds. * * @return: 0 on success, nonzero on failure. It is a failure if any of * the files cannot be `stat'ed, or if any of the needed * directories cannot be opened or read. Failure to add the files * to the WIM may still occur later when trying to actually read * the on-disk files during a call to wimlib_write() or * wimlib_overwrite(). */ static int unix_build_dentry_tree(struct wim_dentry **root_ret, const mbchar *root_disk_path, struct wim_lookup_table *lookup_table, struct wim_security_data *sd, const struct capture_config *config, int add_image_flags, wimlib_progress_func_t progress_func, void *extra_arg) { struct wim_dentry *root = NULL; int ret = 0; struct wim_inode *inode; if (exclude_path(root_disk_path, config, true)) { if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_ROOT) { ERROR("Cannot exclude the root directory from capture"); ret = WIMLIB_ERR_INVALID_CAPTURE_CONFIG; goto out; } if ((add_image_flags & WIMLIB_ADD_IMAGE_FLAG_VERBOSE) && progress_func) { union wimlib_progress_info info; info.scan.cur_path = root_disk_path; info.scan.excluded = true; progress_func(WIMLIB_PROGRESS_MSG_SCAN_DENTRY, &info); } goto out; } if ((add_image_flags & WIMLIB_ADD_IMAGE_FLAG_VERBOSE) && progress_func) { union wimlib_progress_info info; info.scan.cur_path = root_disk_path; info.scan.excluded = false; progress_func(WIMLIB_PROGRESS_MSG_SCAN_DENTRY, &info); } /* UNIX version of capturing a directory tree */ struct stat root_stbuf; int (*stat_fn)(const char *restrict, struct stat *restrict); if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_DEREFERENCE) stat_fn = stat; else stat_fn = lstat; ret = (*stat_fn)(root_disk_path, &root_stbuf); if (ret != 0) { ERROR_WITH_ERRNO("Failed to stat `%s'", root_disk_path); goto out; } if ((add_image_flags & WIMLIB_ADD_IMAGE_FLAG_ROOT) && !S_ISDIR(root_stbuf.st_mode)) { /* Do a dereference-stat in case the root is a symbolic link. * This case is allowed, provided that the symbolic link points * to a directory. */ ret = stat(root_disk_path, &root_stbuf); if (ret != 0) { ERROR_WITH_ERRNO("Failed to stat `%s'", root_disk_path); ret = WIMLIB_ERR_STAT; goto out; } if (!S_ISDIR(root_stbuf.st_mode)) { ERROR("`%s' is not a directory", root_disk_path); ret = WIMLIB_ERR_NOTDIR; goto out; } } if (!S_ISREG(root_stbuf.st_mode) && !S_ISDIR(root_stbuf.st_mode) && !S_ISLNK(root_stbuf.st_mode)) { ERROR("`%s' is not a regular file, directory, or symbolic link.", root_disk_path); ret = WIMLIB_ERR_SPECIAL_FILE; goto out; } ret = new_dentry_with_timeless_inode(path_basename(root_disk_path), &root); if (ret) goto out; inode = root->d_inode; #ifdef HAVE_STAT_NANOSECOND_PRECISION inode->i_creation_time = timespec_to_wim_timestamp(root_stbuf.st_mtim); inode->i_last_write_time = timespec_to_wim_timestamp(root_stbuf.st_mtim); inode->i_last_access_time = timespec_to_wim_timestamp(root_stbuf.st_atim); #else inode->i_creation_time = unix_timestamp_to_wim(root_stbuf.st_mtime); inode->i_last_write_time = unix_timestamp_to_wim(root_stbuf.st_mtime); inode->i_last_access_time = unix_timestamp_to_wim(root_stbuf.st_atime); #endif /* Leave the inode number at 0 for directories. */ if (!S_ISDIR(root_stbuf.st_mode)) { if (sizeof(ino_t) >= 8) inode->i_ino = (u64)root_stbuf.st_ino; else inode->i_ino = (u64)root_stbuf.st_ino | ((u64)root_stbuf.st_dev << ((sizeof(ino_t) * 8) & 63)); } inode->i_resolved = 1; if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_UNIX_DATA) { ret = inode_set_unix_data(inode, root_stbuf.st_uid, root_stbuf.st_gid, root_stbuf.st_mode, lookup_table, UNIX_DATA_ALL | UNIX_DATA_CREATE); if (ret) goto out; } add_image_flags &= ~(WIMLIB_ADD_IMAGE_FLAG_ROOT | WIMLIB_ADD_IMAGE_FLAG_SOURCE); if (S_ISREG(root_stbuf.st_mode)) { /* Archiving a regular file */ struct wim_lookup_table_entry *lte; u8 hash[SHA1_HASH_SIZE]; inode->i_attributes = FILE_ATTRIBUTE_NORMAL; /* Empty files do not have to have a lookup table entry. */ if (root_stbuf.st_size == 0) goto out; /* For each regular file, we must check to see if the file is in * the lookup table already; if it is, we increment its refcnt; * otherwise, we create a new lookup table entry and insert it. * */ ret = sha1sum(root_disk_path, hash); if (ret != 0) goto out; lte = __lookup_resource(lookup_table, hash); if (lte) { lte->refcnt++; DEBUG("Add lte reference %u for `%s'", lte->refcnt, root_disk_path); } else { mbchar *file_on_disk = STRDUP(root_disk_path); if (!file_on_disk) { ERROR("Failed to allocate memory for file path"); ret = WIMLIB_ERR_NOMEM; goto out; } lte = new_lookup_table_entry(); if (!lte) { FREE(file_on_disk); ret = WIMLIB_ERR_NOMEM; goto out; } lte->file_on_disk = file_on_disk; lte->resource_location = RESOURCE_IN_FILE_ON_DISK; lte->resource_entry.original_size = root_stbuf.st_size; lte->resource_entry.size = root_stbuf.st_size; copy_hash(lte->hash, hash); lookup_table_insert(lookup_table, lte); } root->d_inode->i_lte = lte; } else if (S_ISDIR(root_stbuf.st_mode)) { /* Archiving a directory */ inode->i_attributes = FILE_ATTRIBUTE_DIRECTORY; DIR *dir; struct dirent entry, *result; struct wim_dentry *child; dir = opendir(root_disk_path); if (!dir) { ERROR_WITH_ERRNO("Failed to open the directory `%s'", root_disk_path); ret = WIMLIB_ERR_OPEN; goto out; } /* Buffer for names of files in directory. */ size_t len = strlen(root_disk_path); mbchar name[len + 1 + FILENAME_MAX + 1]; memcpy(name, root_disk_path, len); name[len] = '/'; /* Create a dentry for each entry in the directory on disk, and recurse * to any subdirectories. */ while (1) { errno = 0; ret = readdir_r(dir, &entry, &result); if (ret != 0) { ret = WIMLIB_ERR_READ; ERROR_WITH_ERRNO("Error reading the " "directory `%s'", root_disk_path); break; } if (result == NULL) break; if (result->d_name[0] == '.' && (result->d_name[1] == '\0' || (result->d_name[1] == '.' && result->d_name[2] == '\0'))) continue; strcpy(name + len + 1, result->d_name); ret = unix_build_dentry_tree(&child, name, lookup_table, NULL, config, add_image_flags, progress_func, NULL); if (ret != 0) break; if (child) dentry_add_child(root, child); } closedir(dir); } else { /* Archiving a symbolic link */ inode->i_attributes = FILE_ATTRIBUTE_REPARSE_POINT; inode->i_reparse_tag = WIM_IO_REPARSE_TAG_SYMLINK; /* The idea here is to call readlink() to get the UNIX target of * the symbolic link, then turn the target into a reparse point * data buffer that contains a relative or absolute symbolic * link (NOT a junction point or *full* path symbolic link with * drive letter). */ mbchar deref_name_buf[4096]; ssize_t deref_name_len; deref_name_len = readlink(root_disk_path, deref_name_buf, sizeof(deref_name_buf) - 1); if (deref_name_len >= 0) { deref_name_buf[deref_name_len] = '\0'; DEBUG("Read symlink `%s'", deref_name_buf); ret = inode_set_symlink(root->d_inode, deref_name_buf, lookup_table, NULL); if (ret == 0) { /* * Unfortunately, Windows seems to have the * concept of "file" symbolic links as being * different from "directory" symbolic links... * so FILE_ATTRIBUTE_DIRECTORY needs to be set * on the symbolic link if the *target* of the * symbolic link is a directory. */ struct stat stbuf; if (stat(root_disk_path, &stbuf) == 0 && S_ISDIR(stbuf.st_mode)) { inode->i_attributes |= FILE_ATTRIBUTE_DIRECTORY; } } } else { ERROR_WITH_ERRNO("Failed to read target of " "symbolic link `%s'", root_disk_path); ret = WIMLIB_ERR_READLINK; } } out: if (ret == 0) *root_ret = root; else free_dentry_tree(root, lookup_table); return ret; } #endif /* !__WIN32__ */ enum pattern_type { NONE = 0, EXCLUSION_LIST, EXCLUSION_EXCEPTION, COMPRESSION_EXCLUSION_LIST, ALIGNMENT_LIST, }; #define COMPAT_DEFAULT_CONFIG /* Default capture configuration file when none is specified. */ static const mbchar *default_config = #ifdef COMPAT_DEFAULT_CONFIG /* XXX: This policy is being moved to library users. The next ABI-incompatible library version will default to the empty string here. */ "[ExclusionList]\n" "\\$ntfs.log\n" "\\hiberfil.sys\n" "\\pagefile.sys\n" "\\System Volume Information\n" "\\RECYCLER\n" "\\Windows\\CSC\n" "\n" "[CompressionExclusionList]\n" "*.mp3\n" "*.zip\n" "*.cab\n" "\\WINDOWS\\inf\\*.pnf\n"; #else ""; #endif static void destroy_pattern_list(struct pattern_list *list) { FREE(list->pats); } static void destroy_capture_config(struct capture_config *config) { destroy_pattern_list(&config->exclusion_list); destroy_pattern_list(&config->exclusion_exception); destroy_pattern_list(&config->compression_exclusion_list); destroy_pattern_list(&config->alignment_list); FREE(config->config_str); FREE(config->prefix); memset(config, 0, sizeof(*config)); } static int pattern_list_add_pattern(struct pattern_list *list, const mbchar *pattern) { const mbchar **pats; if (list->num_pats >= list->num_allocated_pats) { pats = REALLOC(list->pats, sizeof(list->pats[0]) * (list->num_allocated_pats + 8)); if (!pats) return WIMLIB_ERR_NOMEM; list->num_allocated_pats += 8; list->pats = pats; } list->pats[list->num_pats++] = pattern; return 0; } /* Parses the contents of the image capture configuration file and fills in a * `struct capture_config'. */ static int init_capture_config(struct capture_config *config, const mbchar *_config_str, size_t config_len) { mbchar *config_str; mbchar *p; mbchar *eol; mbchar *next_p; size_t bytes_remaining; enum pattern_type type = NONE; int ret; unsigned long line_no = 0; DEBUG("config_len = %zu", config_len); bytes_remaining = config_len; memset(config, 0, sizeof(*config)); config_str = MALLOC(config_len); if (!config_str) { ERROR("Could not duplicate capture config string"); return WIMLIB_ERR_NOMEM; } memcpy(config_str, _config_str, config_len); next_p = config_str; config->config_str = config_str; while (bytes_remaining) { line_no++; p = next_p; eol = memchr(p, '\n', bytes_remaining); if (!eol) { ERROR("Expected end-of-line in capture config file on " "line %lu", line_no); ret = WIMLIB_ERR_INVALID_CAPTURE_CONFIG; goto out_destroy; } next_p = eol + 1; bytes_remaining -= (next_p - p); if (eol == p) continue; if (*(eol - 1) == '\r') eol--; *eol = '\0'; /* Translate backslash to forward slash */ for (mbchar *pp = p; pp != eol; pp++) if (*pp == '\\') *pp = '/'; /* Remove drive letter */ if (eol - p > 2 && isalpha(*p) && *(p + 1) == ':') p += 2; ret = 0; if (strcmp(p, "[ExclusionList]") == 0) type = EXCLUSION_LIST; else if (strcmp(p, "[ExclusionException]") == 0) type = EXCLUSION_EXCEPTION; else if (strcmp(p, "[CompressionExclusionList]") == 0) type = COMPRESSION_EXCLUSION_LIST; else if (strcmp(p, "[AlignmentList]") == 0) type = ALIGNMENT_LIST; else if (p[0] == '[' && strrchr(p, ']')) { ERROR("Unknown capture configuration section `%s'", p); ret = WIMLIB_ERR_INVALID_CAPTURE_CONFIG; } else switch (type) { case EXCLUSION_LIST: DEBUG("Adding pattern \"%s\" to exclusion list", p); ret = pattern_list_add_pattern(&config->exclusion_list, p); break; case EXCLUSION_EXCEPTION: DEBUG("Adding pattern \"%s\" to exclusion exception list", p); ret = pattern_list_add_pattern(&config->exclusion_exception, p); break; case COMPRESSION_EXCLUSION_LIST: DEBUG("Adding pattern \"%s\" to compression exclusion list", p); ret = pattern_list_add_pattern(&config->compression_exclusion_list, p); break; case ALIGNMENT_LIST: DEBUG("Adding pattern \"%s\" to alignment list", p); ret = pattern_list_add_pattern(&config->alignment_list, p); break; default: ERROR("Line %lu of capture configuration is not " "in a block (such as [ExclusionList])", line_no); ret = WIMLIB_ERR_INVALID_CAPTURE_CONFIG; break; } if (ret != 0) goto out_destroy; } return 0; out_destroy: destroy_capture_config(config); return ret; } static int capture_config_set_prefix(struct capture_config *config, const mbchar *_prefix) { mbchar *prefix = STRDUP(_prefix); if (!prefix) return WIMLIB_ERR_NOMEM; FREE(config->prefix); config->prefix = prefix; config->prefix_len = strlen(prefix); return 0; } static bool match_pattern(const mbchar *path, const mbchar *path_basename, const struct pattern_list *list) { for (size_t i = 0; i < list->num_pats; i++) { const mbchar *pat = list->pats[i]; const mbchar *string; if (pat[0] == '/') /* Absolute path from root of capture */ string = path; else { if (strchr(pat, '/')) /* Relative path from root of capture */ string = path + 1; else /* A file name pattern */ string = path_basename; } /* Warning: on Windows native builds, fnmatch() calls the * replacement function in win32.c. */ if (fnmatch(pat, string, FNM_PATHNAME #ifdef FNM_CASEFOLD | FNM_CASEFOLD #endif ) == 0) { DEBUG("`%s' matches the pattern \"%s\"", string, pat); return true; } } return false; } /* Return true if the image capture configuration file indicates we should * exclude the filename @path from capture. * * If @exclude_prefix is %true, the part of the path up and including the name * of the directory being captured is not included in the path for matching * purposes. This allows, for example, a pattern like /hiberfil.sys to match a * file /mnt/windows7/hiberfil.sys if we are capturing the /mnt/windows7 * directory. */ bool exclude_path(const mbchar *path, const struct capture_config *config, bool exclude_prefix) { const mbchar *basename = path_basename(path); if (exclude_prefix) { wimlib_assert(strlen(path) >= config->prefix_len); if (memcmp(config->prefix, path, config->prefix_len) == 0 && path[config->prefix_len] == '/') path += config->prefix_len; } return match_pattern(path, basename, &config->exclusion_list) && !match_pattern(path, basename, &config->exclusion_exception); } /* Strip leading and trailing forward slashes from a string. Modifies it in * place and returns the stripped string. */ static const char * canonicalize_target_path(char *target_path) { char *p; if (target_path == NULL) return ""; for (;;) { if (*target_path == '\0') return target_path; else if (*target_path == '/') target_path++; else break; } p = target_path + strlen(target_path) - 1; while (*p == '/') *p-- = '\0'; return target_path; } #ifdef __WIN32__ static void zap_backslashes(char *s) { while (*s) { if (*s == '\\') *s = '/'; s++; } } #endif /* Strip leading and trailing slashes from the target paths */ static void canonicalize_targets(struct wimlib_capture_source *sources, size_t num_sources) { while (num_sources--) { DEBUG("Canonicalizing { source: \"%s\", target=\"%s\"}", sources->fs_source_path, sources->wim_target_path); #ifdef __WIN32__ /* The Windows API can handle forward slashes. Just get rid of * backslashes to avoid confusing other parts of the library * code. */ zap_backslashes(sources->fs_source_path); if (sources->wim_target_path) zap_backslashes(sources->wim_target_path); #endif sources->wim_target_path = (char*)canonicalize_target_path(sources->wim_target_path); DEBUG("Canonical target: \"%s\"", sources->wim_target_path); sources++; } } static int capture_source_cmp(const void *p1, const void *p2) { const struct wimlib_capture_source *s1 = p1, *s2 = p2; return strcmp(s1->wim_target_path, s2->wim_target_path); } /* Sorts the capture sources lexicographically by target path. This occurs * after leading and trailing forward slashes are stripped. * * One purpose of this is to make sure that target paths that are inside other * target paths are added after the containing target paths. */ static void sort_sources(struct wimlib_capture_source *sources, size_t num_sources) { qsort(sources, num_sources, sizeof(sources[0]), capture_source_cmp); } static int check_sorted_sources(struct wimlib_capture_source *sources, size_t num_sources, int add_image_flags) { if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_NTFS) { if (num_sources != 1) { ERROR("Must specify exactly 1 capture source " "(the NTFS volume) in NTFS mode!"); return WIMLIB_ERR_INVALID_PARAM; } if (sources[0].wim_target_path[0] != '\0') { ERROR("In NTFS capture mode the target path inside " "the image must be the root directory!"); return WIMLIB_ERR_INVALID_PARAM; } } else if (num_sources != 0) { /* This code is disabled because the current code * unconditionally attempts to do overlays. So, duplicate * target paths are OK. */ #if 0 if (num_sources > 1 && sources[0].wim_target_path[0] == '\0') { ERROR("Cannot specify root target when using multiple " "capture sources!"); return WIMLIB_ERR_INVALID_PARAM; } for (size_t i = 0; i < num_sources - 1; i++) { size_t len = strlen(sources[i].wim_target_path); size_t j = i + 1; const char *target1 = sources[i].wim_target_path; do { const char *target2 = sources[j].wim_target_path; DEBUG("target1=%s, target2=%s", target1,target2); if (strncmp(target1, target2, len) || target2[len] > '/') break; if (target2[len] == '/') { ERROR("Invalid target `%s': is a prefix of `%s'", target1, target2); return WIMLIB_ERR_INVALID_PARAM; } if (target2[len] == '\0') { ERROR("Invalid target `%s': is a duplicate of `%s'", target1, target2); return WIMLIB_ERR_INVALID_PARAM; } } while (++j != num_sources); } #endif } return 0; } /* Creates a new directory to place in the WIM image. This is to create parent * directories that are not part of any target as needed. */ static int new_filler_directory(const mbchar *name, struct wim_dentry **dentry_ret) { int ret; struct wim_dentry *dentry; DEBUG("Creating filler directory \"%s\"", name); ret = new_dentry_with_inode(name, &dentry); if (ret == 0) { /* Leave the inode number as 0 for now. The final inode number * will be assigned later by assign_inode_numbers(). */ dentry->d_inode->i_resolved = 1; dentry->d_inode->i_attributes = FILE_ATTRIBUTE_DIRECTORY; *dentry_ret = dentry; } return ret; } /* Transfers the children of @branch to @target. It is an error if @target is * not a directory or if both @branch and @target contain a child dentry with * the same name. */ static int do_overlay(struct wim_dentry *target, struct wim_dentry *branch) { struct rb_root *rb_root; DEBUG("Doing overlay \"%W\" => \"%W\"", branch->file_name, target->file_name); if (!dentry_is_directory(target)) { ERROR("Cannot overlay directory \"%W\" over non-directory", branch->file_name); return WIMLIB_ERR_INVALID_OVERLAY; } rb_root = &branch->d_inode->i_children; while (rb_root->rb_node) { /* While @branch has children... */ struct wim_dentry *child = rbnode_dentry(rb_root->rb_node); /* Move @child to the directory @target */ unlink_dentry(child); if (!dentry_add_child(target, child)) { /* Revert the change to avoid leaking the directory tree * rooted at @child */ dentry_add_child(branch, child); ERROR("Overlay error: file \"%W\" already exists " "as a child of \"%W\"", child->file_name, target->file_name); return WIMLIB_ERR_INVALID_OVERLAY; } } free_dentry(branch); return 0; } /* Attach or overlay a branch onto the WIM image. * * @root_p: * Pointer to the root of the WIM image, or pointer to NULL if it has not * been created yet. * @branch * Branch to add. * @target_path: * Path in the WIM image to add the branch, with leading and trailing * slashes stripped. */ static int attach_branch(struct wim_dentry **root_p, struct wim_dentry *branch, mbchar *target_path) { mbchar *slash; struct wim_dentry *dentry, *parent, *target; int ret; DEBUG("Attaching branch \"%W\" => \"%s\"", branch->file_name, target_path); if (*target_path == '\0') { /* Target: root directory */ if (*root_p) { /* Overlay on existing root */ return do_overlay(*root_p, branch); } else { /* Set as root */ *root_p = branch; return 0; } } /* Adding a non-root branch. Create root if it hasn't been created * already. */ if (!*root_p) { ret = new_filler_directory("", root_p); if (ret) return ret; } /* Walk the path to the branch, creating filler directories as needed. * */ parent = *root_p; while ((slash = strchr(target_path, '/'))) { *slash = '\0'; dentry = get_dentry_child_with_name(parent, target_path); if (!dentry) { ret = new_filler_directory(target_path, &dentry); if (ret) return ret; dentry_add_child(parent, dentry); } parent = dentry; target_path = slash; /* Skip over slashes. Note: this cannot overrun the length of * the string because the last character cannot be a slash, as * trailing slashes were tripped. */ do { ++target_path; } while (*target_path == '/'); } /* If the target path already existed, overlay the branch onto it. * Otherwise, set the branch as the target path. */ target = get_dentry_child_with_utf16le_name(parent, branch->file_name, branch->file_name_nbytes); if (target) { return do_overlay(target, branch); } else { dentry_add_child(parent, branch); return 0; } } WIMLIBAPI int wimlib_add_image_multisource(WIMStruct *w, struct wimlib_capture_source *sources, size_t num_sources, const utf8char *name, const mbchar *config_str, size_t config_len, int add_image_flags, wimlib_progress_func_t progress_func) { int (*capture_tree)(struct wim_dentry **, const mbchar *, struct wim_lookup_table *, struct wim_security_data *, const struct capture_config *, int, wimlib_progress_func_t, void *); void *extra_arg; struct wim_dentry *root_dentry; struct wim_dentry *branch; struct wim_security_data *sd; struct capture_config config; struct wim_image_metadata *imd; int ret; if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_NTFS) { #ifdef WITH_NTFS_3G if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_DEREFERENCE) { ERROR("Cannot dereference files when capturing directly from NTFS"); return WIMLIB_ERR_INVALID_PARAM; } if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_UNIX_DATA) { ERROR("Capturing UNIX owner and mode not supported " "when capturing directly from NTFS"); return WIMLIB_ERR_INVALID_PARAM; } capture_tree = build_dentry_tree_ntfs; extra_arg = &w->ntfs_vol; #else ERROR("wimlib was compiled without support for NTFS-3g, so\n" " cannot capture a WIM image directly from a NTFS volume!"); return WIMLIB_ERR_UNSUPPORTED; #endif } else { #ifdef __WIN32__ capture_tree = win32_build_dentry_tree; #else capture_tree = unix_build_dentry_tree; #endif extra_arg = NULL; } #ifdef __WIN32__ if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_UNIX_DATA) { ERROR("Capturing UNIX-specific data is not supported on Windows"); return WIMLIB_ERR_INVALID_PARAM; } if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_DEREFERENCE) { ERROR("Dereferencing symbolic links is not supported on Windows"); return WIMLIB_ERR_INVALID_PARAM; } #endif if (!name || !*name) { ERROR("Must specify a non-empty string for the image name"); return WIMLIB_ERR_INVALID_PARAM; } if (w->hdr.total_parts != 1) { ERROR("Cannot add an image to a split WIM"); return WIMLIB_ERR_SPLIT_UNSUPPORTED; } if (wimlib_image_name_in_use(w, name)) { ERROR("There is already an image named \"%U\" in the WIM!", name); return WIMLIB_ERR_IMAGE_NAME_COLLISION; } if (!config_str) { DEBUG("Using default capture configuration"); config_str = default_config; config_len = strlen(default_config); } ret = init_capture_config(&config, config_str, config_len); if (ret) goto out; DEBUG("Allocating security data"); sd = CALLOC(1, sizeof(struct wim_security_data)); if (!sd) { ret = WIMLIB_ERR_NOMEM; goto out_destroy_capture_config; } sd->total_length = 8; sd->refcnt = 1; DEBUG("Using %zu capture sources", num_sources); canonicalize_targets(sources, num_sources); sort_sources(sources, num_sources); ret = check_sorted_sources(sources, num_sources, add_image_flags); if (ret) { ret = WIMLIB_ERR_INVALID_PARAM; goto out_free_security_data; } DEBUG("Building dentry tree."); root_dentry = NULL; for (size_t i = 0; i < num_sources; i++) { int flags; union wimlib_progress_info progress; DEBUG("Building dentry tree for source %zu of %zu " "(\"%s\" => \"%s\")", i + 1, num_sources, sources[i].fs_source_path, sources[i].wim_target_path); if (progress_func) { memset(&progress, 0, sizeof(progress)); progress.scan.source = sources[i].fs_source_path; progress.scan.wim_target_path = sources[i].wim_target_path; progress_func(WIMLIB_PROGRESS_MSG_SCAN_BEGIN, &progress); } ret = capture_config_set_prefix(&config, sources[i].fs_source_path); if (ret) goto out_free_dentry_tree; flags = add_image_flags | WIMLIB_ADD_IMAGE_FLAG_SOURCE; if (!*sources[i].wim_target_path) flags |= WIMLIB_ADD_IMAGE_FLAG_ROOT; ret = (*capture_tree)(&branch, sources[i].fs_source_path, w->lookup_table, sd, &config, flags, progress_func, extra_arg); if (ret) { ERROR("Failed to build dentry tree for `%s'", sources[i].fs_source_path); goto out_free_dentry_tree; } if (branch) { /* Use the target name, not the source name, for * the root of each branch from a capture * source. (This will also set the root dentry * of the entire image to be unnamed.) */ ret = set_dentry_name(branch, path_basename(sources[i].wim_target_path)); if (ret) goto out_free_branch; ret = attach_branch(&root_dentry, branch, sources[i].wim_target_path); if (ret) goto out_free_branch; } if (progress_func) progress_func(WIMLIB_PROGRESS_MSG_SCAN_END, &progress); } if (root_dentry == NULL) { ret = new_filler_directory("" , &root_dentry); if (ret) goto out_free_dentry_tree; } DEBUG("Calculating full paths of dentries."); ret = for_dentry_in_tree(root_dentry, calculate_dentry_full_path, NULL); if (ret) goto out_free_dentry_tree; ret = add_new_dentry_tree(w, root_dentry, sd); if (ret) goto out_free_dentry_tree; imd = &w->image_metadata[w->hdr.image_count - 1]; ret = dentry_tree_fix_inodes(root_dentry, &imd->inode_list); if (ret) goto out_destroy_imd; DEBUG("Assigning hard link group IDs"); assign_inode_numbers(&imd->inode_list); ret = xml_add_image(w, name); if (ret) goto out_destroy_imd; if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_BOOT) wimlib_set_boot_idx(w, w->hdr.image_count); ret = 0; goto out_destroy_capture_config; out_destroy_imd: destroy_image_metadata(&w->image_metadata[w->hdr.image_count - 1], w->lookup_table); w->hdr.image_count--; goto out; out_free_branch: free_dentry_tree(branch, w->lookup_table); out_free_dentry_tree: free_dentry_tree(root_dentry, w->lookup_table); out_free_security_data: free_security_data(sd); out_destroy_capture_config: destroy_capture_config(&config); out: return ret; } WIMLIBAPI int wimlib_add_image(WIMStruct *w, const mbchar *source, const utf8char *name, const mbchar *config_str, size_t config_len, int add_image_flags, wimlib_progress_func_t progress_func) { if (!source || !*source) return WIMLIB_ERR_INVALID_PARAM; mbchar *fs_source_path = STRDUP(source); int ret; struct wimlib_capture_source capture_src = { .fs_source_path = fs_source_path, .wim_target_path = NULL, .reserved = 0, }; ret = wimlib_add_image_multisource(w, &capture_src, 1, name, config_str, config_len, add_image_flags, progress_func); FREE(fs_source_path); return ret; }