X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Fextract.c;h=44076db02b58e4ecef6da9d617c51005d4f720e7;hp=88b277ac080fed49a61a40cb7a0aa52c6b487696;hb=d24d7c4dabe2dea576f21dda985d096d0d962c42;hpb=e3689bfa91c108ea0f5c86160bd594f98cd541a6 diff --git a/src/extract.c b/src/extract.c index 88b277ac..44076db0 100644 --- a/src/extract.c +++ b/src/extract.c @@ -49,15 +49,16 @@ #include "wimlib/error.h" #include "wimlib/lookup_table.h" #include "wimlib/metadata.h" +#include "wimlib/pathlist.h" #include "wimlib/paths.h" #include "wimlib/reparse.h" #include "wimlib/resource.h" #include "wimlib/security.h" -#include "wimlib/swm.h" #ifdef __WIN32__ # include "wimlib/win32.h" /* for realpath() equivalent */ #endif #include "wimlib/xml.h" +#include "wimlib/wildcard.h" #include "wimlib/wim.h" #include @@ -68,7 +69,8 @@ #define WIMLIB_EXTRACT_FLAG_MULTI_IMAGE 0x80000000 #define WIMLIB_EXTRACT_FLAG_FROM_PIPE 0x40000000 -#define WIMLIB_EXTRACT_MASK_PUBLIC 0x3fffffff +#define WIMLIB_EXTRACT_FLAG_PATHMODE 0x20000000 +#define WIMLIB_EXTRACT_MASK_PUBLIC 0x1fffffff /* Given a WIM dentry in the tree to be extracted, resolve all streams in the * corresponding inode and set 'out_refcnt' in each to 0. */ @@ -123,19 +125,25 @@ ref_stream_to_extract(struct wim_lookup_table_entry *lte, if (!lte) return 0; - if (likely(!is_linked_extraction(ctx)) || (lte->out_refcnt == 0 && - lte->extracted_file == NULL)) + /* Tally the size only for each extraction of the stream (not hard + * links). */ + if (!(dentry->d_inode->i_visited && + ctx->supported_features.hard_links) && + (!is_linked_extraction(ctx) || (lte->out_refcnt == 0 && + lte->extracted_file == NULL))) { - ctx->progress.extract.total_bytes += wim_resource_size(lte); + ctx->progress.extract.total_bytes += lte->size; ctx->progress.extract.num_streams++; } + /* Add stream to the extraction_list only one time, even if it's going + * to be extracted to multiple locations. */ if (lte->out_refcnt == 0) { list_add_tail(<e->extraction_list, &ctx->stream_list); ctx->num_streams_remaining++; } - if (ctx->extract_flags & WIMLIB_EXTRACT_FLAG_SEQUENTIAL) { + if (!(ctx->extract_flags & WIMLIB_EXTRACT_FLAG_FILE_ORDER)) { struct wim_dentry **lte_dentries; /* Append dentry to this stream's array of dentries referencing @@ -160,7 +168,7 @@ ref_stream_to_extract(struct wim_lookup_table_entry *lte, lte_dentries = REALLOC(prev_lte_dentries, alloc_lte_dentries * sizeof(lte_dentries[0])); - if (!lte_dentries) + if (lte_dentries == NULL) return WIMLIB_ERR_NOMEM; if (prev_lte_dentries == NULL) { memcpy(lte_dentries, @@ -183,7 +191,9 @@ ref_stream_to_extract(struct wim_lookup_table_entry *lte, * extracted (ctx->stream_list) if not already done so, and also update the * progress information (ctx->progress) with the stream. Furthermore, if doing * a sequential extraction, build a mapping from each the stream to the dentries - * referencing it. */ + * referencing it. + * + * This uses the i_visited member of the inodes (assumed to be 0 initially). */ static int dentry_add_streams_to_extract(struct wim_dentry *dentry, void *_ctx) { @@ -195,10 +205,6 @@ dentry_add_streams_to_extract(struct wim_dentry *dentry, void *_ctx) if (dentry->extraction_skipped) return 0; - /* Don't process additional hard links. */ - if (inode->i_visited && ctx->supported_features.hard_links) - return 0; - /* The unnamed data stream will always be extracted, except in an * unlikely case. */ if (!inode_is_encrypted_directory(inode)) { @@ -234,7 +240,7 @@ update_extract_progress(struct apply_ctx *ctx, wimlib_progress_func_t progress_func = ctx->progress_func; union wimlib_progress_info *progress = &ctx->progress; - progress->extract.completed_bytes += wim_resource_size(lte); + progress->extract.completed_bytes += lte->size; if (progress_func && progress->extract.completed_bytes >= ctx->next_progress) { @@ -338,6 +344,15 @@ extract_inode(const tchar *path, struct apply_ctx *ctx, struct wim_inode *inode) ERROR_WITH_ERRNO("Failed to create the directory " "\"%"TS"\"", path); } + } else if ((inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED) && + ctx->ops->extract_encrypted_stream_creates_file && + ctx->supported_features.encrypted_files) { + ret = ctx->ops->extract_encrypted_stream( + path, inode_unnamed_lte_resolved(inode), ctx); + if (ret) { + ERROR_WITH_ERRNO("Failed to create and extract " + "encrypted file \"%"TS"\"", path); + } } else { ret = ctx->ops->create_file(path, ctx, &inode->extract_cookie); if (ret) { @@ -522,10 +537,10 @@ error: * This function operates slightly differently depending on whether @lte_spec is * NULL or not. When @lte_spec is NULL, the behavior is to extract the default * file contents (unnamed stream), and, if named data streams are supported in - * the extract mode and volume, any named data streams. When @lte_spec is NULL, - * the behavior is to extract only all copies of the stream @lte_spec, and in - * addition use @lte_spec to set the reparse data or create the symbolic link if - * appropriate. + * the extract mode and volume, any named data streams. When @lte_spec is not + * NULL, the behavior is to extract only all copies of the stream @lte_spec, and + * in addition use @lte_spec to set the reparse data or create the symbolic link + * if appropriate. * * @path * Path to file to extract (as can be passed to apply_operations @@ -585,13 +600,20 @@ extract_streams(const tchar *path, struct apply_ctx *ctx, if (!(inode->i_attributes & (FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_REPARSE_POINT))) { - if ((inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED) && - ctx->supported_features.encrypted_files) - ret = ctx->ops->extract_encrypted_stream(file_spec, lte, ctx); - else - ret = ctx->ops->extract_unnamed_stream(file_spec, lte, ctx); - if (ret) - goto error; + if (inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED && + ctx->supported_features.encrypted_files) { + if (!ctx->ops->extract_encrypted_stream_creates_file) { + ret = ctx->ops->extract_encrypted_stream( + path, lte, ctx); + if (ret) + goto error; + } + } else { + ret = ctx->ops->extract_unnamed_stream( + file_spec, lte, ctx); + if (ret) + goto error; + } update_extract_progress(ctx, lte); } else if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT) @@ -642,16 +664,29 @@ error: * extraction mode. */ static int extract_file_attributes(const tchar *path, struct apply_ctx *ctx, - struct wim_dentry *dentry) + struct wim_dentry *dentry, unsigned pass) { int ret; - if (ctx->ops->set_file_attributes) { - if (dentry == ctx->extract_root && ctx->root_dentry_is_special) - return 0; - ret = ctx->ops->set_file_attributes(path, - dentry->d_inode->i_attributes, - ctx); + if (ctx->ops->set_file_attributes && + !(dentry == ctx->extract_root && ctx->root_dentry_is_special)) { + u32 attributes = dentry->d_inode->i_attributes; + + /* Clear unsupported attributes. */ + attributes &= ctx->supported_attributes_mask; + + if ((attributes & FILE_ATTRIBUTE_DIRECTORY && + !ctx->supported_features.encrypted_directories) || + (!(attributes & FILE_ATTRIBUTE_DIRECTORY) && + !ctx->supported_features.encrypted_files)) + { + attributes &= ~FILE_ATTRIBUTE_ENCRYPTED; + } + + if (attributes == 0) + attributes = FILE_ATTRIBUTE_NORMAL; + + ret = ctx->ops->set_file_attributes(path, attributes, ctx, pass); if (ret) { ERROR_WITH_ERRNO("Failed to set attributes on " "\"%"TS"\"", path); @@ -753,11 +788,14 @@ extract_security(const tchar *path, struct apply_ctx *ctx, "descriptor on \"%"TS"\"", path); return ret; } else { + #if 0 if (errno != EACCES) { WARNING_WITH_ERRNO("Failed to set " "security descriptor " "on \"%"TS"\"", path); } + #endif + ctx->no_security_descriptors++; } } } @@ -804,12 +842,15 @@ dentry_is_supported(struct wim_dentry *dentry, struct wim_inode *inode = dentry->d_inode; if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT) { - if (supported_features->reparse_points) - return true; - if (supported_features->symlink_reparse_points && - inode_is_symlink(inode)) - return true; - return false; + return supported_features->reparse_points || + (inode_is_symlink(inode) && + supported_features->symlink_reparse_points); + } + if (inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED) { + if (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY) + return supported_features->encrypted_directories != 0; + else + return supported_features->encrypted_files != 0; } return true; } @@ -882,6 +923,11 @@ static unsigned get_num_path_components(const tchar *path, tchar path_separator) { unsigned num_components = 0; +#ifdef __WIN32__ + /* Ignore drive letter. */ + if (path[0] != L'\0' && path[1] == L':') + path += 2; +#endif while (*path) { while (*path == path_separator) @@ -924,7 +970,11 @@ extract_multiimage_symlink(const tchar *oldpath, const tchar *newpath, num_target_path_components--; } - p_old = oldpath; + p_old = oldpath + ctx->ops->path_prefix_nchars; +#ifdef __WIN32__ + if (p_old[0] != L'\0' && p_old[1] == ':') + p_old += 2; +#endif while (*p_old == ctx->ops->path_separator) p_old++; while (--num_target_path_components) { @@ -1028,7 +1078,7 @@ do_dentry_extract_skeleton(tchar path[], struct wim_dentry *dentry, } /* Set file attributes (if supported). */ - ret = extract_file_attributes(path, ctx, dentry); + ret = extract_file_attributes(path, ctx, dentry, 0); if (ret) return ret; @@ -1071,6 +1121,11 @@ hardlink: return 0; } +/* This is a wrapper around do_dentry_extract_skeleton() that handles building + * the path, doing short name reordering. This is also idempotent; dentries + * already processed have skeleton_extracted set and no action is taken. See + * apply_operations.requires_short_name_reordering for more details about short + * name reordering. */ static int dentry_extract_skeleton(struct wim_dentry *dentry, void *_ctx) { @@ -1080,32 +1135,19 @@ dentry_extract_skeleton(struct wim_dentry *dentry, void *_ctx) struct wim_dentry *other_dentry; int ret; - /* Here we may re-order the extraction of multiple names (hard links) - * for the same file in the same directory in order to ensure the short - * (DOS) name is set correctly. A short name is always associated with - * exactly one long name, and at least on NTFS, only one long name for a - * file can have a short name associated with it. (More specifically, - * there can be unlimited names in the POSIX namespace, but only one - * name can be in the Win32+DOS namespace, or one name in the Win32 - * namespace with a corresponding name in the DOS namespace.) To ensure - * the short name of a file is associated with the correct long name in - * a directory, we extract the long name with a corresponding short name - * before any additional names. This can affect NTFS-3g extraction - * (which uses ntfs_set_ntfs_dos_name(), which doesn't allow specifying - * the long name to associate with a short name) and may affect Win32 - * extraction as well (which uses SetFileShortName()). */ - if (dentry->skeleton_extracted) return 0; + orig_dentry = NULL; if (ctx->supported_features.short_names + && ctx->ops->requires_short_name_reordering && !dentry_has_short_name(dentry) && !dentry->d_inode->i_dos_name_extracted) { inode_for_each_dentry(other_dentry, dentry->d_inode) { if (dentry_has_short_name(other_dentry) && !other_dentry->skeleton_extracted - && other_dentry->parent == dentry->parent) + && other_dentry->in_extraction_tree) { DEBUG("Creating %"TS" before %"TS" " "to guarantee correct DOS name extraction", @@ -1135,8 +1177,15 @@ again: return 0; } -/* Create a file or directory, then immediately extract all streams. This - * assumes that WIMLIB_EXTRACT_FLAG_SEQUENTIAL is not specified, since the WIM +static int +dentry_extract_dir_skeleton(struct wim_dentry *dentry, void *_ctx) +{ + if (dentry->d_inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY) + return dentry_extract_skeleton(dentry, _ctx); + return 0; +} + +/* Create a file or directory, then immediately extract all streams. The WIM * may not be read sequentially by this function. */ static int dentry_extract(struct wim_dentry *dentry, void *_ctx) @@ -1155,23 +1204,50 @@ dentry_extract(struct wim_dentry *dentry, void *_ctx) return extract_streams(path, ctx, dentry, NULL, NULL); } +/* Creates a temporary file opened for writing. The open file descriptor is + * returned in @fd_ret and its name is returned in @name_ret (dynamically + * allocated). */ +static int +create_temporary_file(struct filedes *fd_ret, tchar **name_ret) +{ + tchar *name; + int raw_fd; + +retry: + name = ttempnam(NULL, T("wimlib")); + if (name == NULL) { + ERROR_WITH_ERRNO("Failed to create temporary filename"); + return WIMLIB_ERR_NOMEM; + } + + raw_fd = topen(name, O_WRONLY | O_CREAT | O_EXCL | O_BINARY, 0600); + + if (raw_fd < 0) { + if (errno == EEXIST) { + FREE(name); + goto retry; + } + ERROR_WITH_ERRNO("Failed to open temporary file \"%"TS"\"", name); + FREE(name); + return WIMLIB_ERR_OPEN; + } + + filedes_init(fd_ret, raw_fd); + *name_ret = name; + return 0; +} + /* Extract all instances of the stream @lte that are being extracted in this - * call of extract_tree(). @can_seek specifies whether the WIM file descriptor - * is seekable or not (e.g. is a pipe). If not and the stream needs to be - * extracted multiple times, it is extracted to a temporary file first. - * - * This is intended for use with sequential extraction of a WIM image - * (WIMLIB_EXTRACT_FLAG_SEQUENTIAL specified). */ + * call of extract_tree(), but actually read the stream data from @lte_override. + */ static int extract_stream_instances(struct wim_lookup_table_entry *lte, - struct apply_ctx *ctx, bool can_seek) + struct wim_lookup_table_entry *lte_override, + struct apply_ctx *ctx) { struct wim_dentry **lte_dentries; - struct wim_lookup_table_entry *lte_tmp = NULL; - struct wim_lookup_table_entry *lte_override; - tchar *stream_tmp_filename = NULL; tchar path[ctx->ops->path_max]; - unsigned i; + size_t i; int ret; if (lte->out_refcnt <= ARRAY_LEN(lte->inline_lte_dentries)) @@ -1179,50 +1255,6 @@ extract_stream_instances(struct wim_lookup_table_entry *lte, else lte_dentries = lte->lte_dentries; - if (likely(can_seek || lte->out_refcnt < 2)) { - lte_override = lte; - } else { - /* Need to extract stream to temporary file. */ - struct filedes fd; - int raw_fd; - - stream_tmp_filename = ttempnam(NULL, T("wimlib")); - if (!stream_tmp_filename) { - ERROR_WITH_ERRNO("Failed to create temporary filename"); - ret = WIMLIB_ERR_OPEN; - goto out; - } - - lte_tmp = memdup(lte, sizeof(struct wim_lookup_table_entry)); - if (!lte_tmp) { - ret = WIMLIB_ERR_NOMEM; - goto out_free_stream_tmp_filename; - } - lte_tmp->resource_location = RESOURCE_IN_FILE_ON_DISK; - lte_tmp->file_on_disk = stream_tmp_filename; - lte_override = lte_tmp; - - raw_fd = topen(stream_tmp_filename, - O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0600); - if (raw_fd < 0) { - ERROR_WITH_ERRNO("Failed to open temporary file"); - ret = WIMLIB_ERR_OPEN; - goto out_free_lte_tmp; - } - filedes_init(&fd, raw_fd); - ret = extract_wim_resource_to_fd(lte, &fd, - wim_resource_size(lte)); - if (filedes_close(&fd) && !ret) - ret = WIMLIB_ERR_WRITE; - if (ret) - goto out_unlink_stream_tmp_file; - } - - /* Extract all instances of the stream, reading either from the stream - * in the WIM file or from the temporary file containing the stream. - * dentry->tmp_flag is used to ensure that each dentry is processed only - * once regardless of how many times this stream appears in the streams - * of the corresponding inode. */ for (i = 0; i < lte->out_refcnt; i++) { struct wim_dentry *dentry = lte_dentries[i]; @@ -1230,8 +1262,7 @@ extract_stream_instances(struct wim_lookup_table_entry *lte, continue; if (!build_extraction_path(path, dentry, ctx)) continue; - ret = extract_streams(path, ctx, dentry, - lte, lte_override); + ret = extract_streams(path, ctx, dentry, lte, lte_override); if (ret) goto out_clear_tmp_flags; dentry->tmp_flag = 1; @@ -1240,38 +1271,138 @@ extract_stream_instances(struct wim_lookup_table_entry *lte, out_clear_tmp_flags: for (i = 0; i < lte->out_refcnt; i++) lte_dentries[i]->tmp_flag = 0; -out_unlink_stream_tmp_file: - if (stream_tmp_filename) - tunlink(stream_tmp_filename); -out_free_lte_tmp: - FREE(lte_tmp); -out_free_stream_tmp_filename: - FREE(stream_tmp_filename); -out: + return ret; +} + +/* Determine whether the specified stream needs to be extracted to a temporary + * file or not. + * + * @lte->out_refcnt specifies the number of instances of this stream that must + * be extracted. + * + * @is_partial_res is %true if this stream is just one of multiple in a single + * WIM resource being extracted. */ +static bool +need_tmpfile_to_extract(struct wim_lookup_table_entry *lte, + bool is_partial_res) +{ + /* Temporary file is always required when reading a partial resource, + * since in that case we retrieve all the contained streams in one pass. + * */ + if (is_partial_res) + return true; + + /* Otherwise we don't need a temporary file if only a single instance of + * the stream is needed. */ + if (lte->out_refcnt == 1) + return false; + + wimlib_assert(lte->out_refcnt >= 2); + + /* We also don't need a temporary file if random access to the stream is + * allowed. */ + if (lte->resource_location != RESOURCE_IN_WIM || + filedes_is_seekable(<e->rspec->wim->in_fd)) + return false; + + return true; +} + +static int +begin_extract_stream_to_tmpfile(struct wim_lookup_table_entry *lte, + bool is_partial_res, + void *_ctx) +{ + struct apply_ctx *ctx = _ctx; + int ret; + + if (!need_tmpfile_to_extract(lte, is_partial_res)) { + DEBUG("Temporary file not needed " + "for stream (size=%"PRIu64")", lte->size); + ret = extract_stream_instances(lte, lte, ctx); + if (ret) + return ret; + + return BEGIN_STREAM_STATUS_SKIP_STREAM; + } + + DEBUG("Temporary file needed for stream (size=%"PRIu64")", lte->size); + return create_temporary_file(&ctx->tmpfile_fd, &ctx->tmpfile_name); +} + +static int +end_extract_stream_to_tmpfile(struct wim_lookup_table_entry *lte, + int status, void *_ctx) +{ + struct apply_ctx *ctx = _ctx; + struct wim_lookup_table_entry lte_override; + int ret; + int errno_save = errno; + + ret = filedes_close(&ctx->tmpfile_fd); + + if (status) { + ret = status; + errno = errno_save; + goto out_delete_tmpfile; + } + + if (ret) { + ERROR_WITH_ERRNO("Error writing temporary file %"TS, ctx->tmpfile_name); + ret = WIMLIB_ERR_WRITE; + goto out_delete_tmpfile; + } + + /* Now that a full stream has been extracted to a temporary file, + * extract all instances of it to the actual target. */ + + memcpy(<e_override, lte, sizeof(struct wim_lookup_table_entry)); + lte_override.resource_location = RESOURCE_IN_FILE_ON_DISK; + lte_override.file_on_disk = ctx->tmpfile_name; + + ret = extract_stream_instances(lte, <e_override, ctx); + +out_delete_tmpfile: + errno_save = errno; + tunlink(ctx->tmpfile_name); + FREE(ctx->tmpfile_name); + errno = errno_save; return ret; } /* Extracts a list of streams (ctx.stream_list), assuming that the directory * structure and empty files were already created. This relies on the * per-`struct wim_lookup_table_entry' list of dentries that reference each - * stream that was constructed earlier. Streams are extracted exactly in the - * order of the stream list; however, unless the WIM's file descriptor is - * detected to be non-seekable, streams may be read from the WIM file more than - * one time if multiple copies need to be extracted. */ + * stream that was constructed earlier. */ static int extract_stream_list(struct apply_ctx *ctx) { - struct wim_lookup_table_entry *lte; - bool can_seek; - int ret; + if (!(ctx->extract_flags & WIMLIB_EXTRACT_FLAG_FILE_ORDER)) { + /* Sequential extraction: read the streams in the order in which + * they appear in the WIM file. */ + struct read_stream_list_callbacks cbs = { + .begin_stream = begin_extract_stream_to_tmpfile, + .begin_stream_ctx = ctx, + .consume_chunk = extract_chunk_to_fd, + .consume_chunk_ctx = &ctx->tmpfile_fd, + .end_stream = end_extract_stream_to_tmpfile, + .end_stream_ctx = ctx, + }; + return read_stream_list(&ctx->stream_list, + offsetof(struct wim_lookup_table_entry, extraction_list), + &cbs, VERIFY_STREAM_HASHES); + } else { + /* Extract the streams in unsorted order. */ + struct wim_lookup_table_entry *lte; + int ret; - can_seek = (lseek(ctx->wim->in_fd.fd, 0, SEEK_CUR) != -1); - list_for_each_entry(lte, &ctx->stream_list, extraction_list) { - ret = extract_stream_instances(lte, ctx, can_seek); - if (ret) - return ret; + list_for_each_entry(lte, &ctx->stream_list, extraction_list) { + ret = extract_stream_instances(lte, lte, ctx); + if (ret) + return ret; + } + return 0; } - return 0; } #define PWM_ALLOW_WIM_HDR 0x00001 @@ -1280,12 +1411,14 @@ extract_stream_list(struct apply_ctx *ctx) /* Read the header from a stream in a pipable WIM. */ static int read_pwm_stream_header(WIMStruct *pwm, struct wim_lookup_table_entry *lte, + struct wim_resource_spec *rspec, int flags, struct wim_header_disk *hdr_ret) { union { struct pwm_stream_hdr stream_hdr; struct wim_header_disk pwm_hdr; } buf; + struct wim_reshdr reshdr; int ret; ret = full_read(&pwm->in_fd, &buf.stream_hdr, sizeof(buf.stream_hdr)); @@ -1304,25 +1437,22 @@ read_pwm_stream_header(WIMStruct *pwm, struct wim_lookup_table_entry *lte, return 0; } - if (buf.stream_hdr.magic != PWM_STREAM_MAGIC) { + if (le64_to_cpu(buf.stream_hdr.magic) != PWM_STREAM_MAGIC) { ERROR("Data read on pipe is invalid (expected stream header)."); return WIMLIB_ERR_INVALID_PIPABLE_WIM; } - lte->resource_entry.original_size = le64_to_cpu(buf.stream_hdr.uncompressed_size); copy_hash(lte->hash, buf.stream_hdr.hash); - lte->resource_entry.flags = le32_to_cpu(buf.stream_hdr.flags); - lte->resource_entry.offset = pwm->in_fd.offset; - lte->resource_location = RESOURCE_IN_WIM; - lte->wim = pwm; - if (lte->resource_entry.flags & WIM_RESHDR_FLAG_COMPRESSED) { - lte->compression_type = pwm->compression_type; - lte->resource_entry.size = 0; - } else { - lte->compression_type = WIMLIB_COMPRESSION_TYPE_NONE; - lte->resource_entry.size = lte->resource_entry.original_size; - } - lte->is_pipable = 1; + + reshdr.size_in_wim = 0; + reshdr.flags = le32_to_cpu(buf.stream_hdr.flags); + reshdr.offset_in_wim = pwm->in_fd.offset; + reshdr.uncompressed_size = le64_to_cpu(buf.stream_hdr.uncompressed_size); + wim_res_hdr_to_spec(&reshdr, pwm, rspec); + lte_bind_wim_resource_spec(lte, rspec); + lte->flags = rspec->flags; + lte->size = rspec->uncompressed_size; + lte->offset_in_res = 0; return 0; read_error: @@ -1331,20 +1461,11 @@ read_error: return ret; } -/* Skip over an unneeded stream in a pipable WIM being read from a pipe. */ -static int -skip_pwm_stream(struct wim_lookup_table_entry *lte) -{ - return read_partial_wim_resource(lte, wim_resource_size(lte), - NULL, NULL, - WIMLIB_READ_RESOURCE_FLAG_SEEK_ONLY, - 0); -} - static int extract_streams_from_pipe(struct apply_ctx *ctx) { struct wim_lookup_table_entry *found_lte; + struct wim_resource_spec *rspec; struct wim_lookup_table_entry *needed_lte; struct wim_lookup_table *lookup_table; struct wim_header_disk pwm_hdr; @@ -1353,9 +1474,13 @@ extract_streams_from_pipe(struct apply_ctx *ctx) ret = WIMLIB_ERR_NOMEM; found_lte = new_lookup_table_entry(); - if (!found_lte) + if (found_lte == NULL) goto out; + rspec = MALLOC(sizeof(struct wim_resource_spec)); + if (rspec == NULL) + goto out_free_found_lte; + lookup_table = ctx->wim->lookup_table; pwm_flags = PWM_ALLOW_WIM_HDR; if ((ctx->extract_flags & WIMLIB_EXTRACT_FLAG_RESUME)) @@ -1367,8 +1492,10 @@ extract_streams_from_pipe(struct apply_ctx *ctx) ctx->progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_SPWM_PART_BEGIN, &ctx->progress); while (ctx->num_streams_remaining) { - ret = read_pwm_stream_header(ctx->wim, found_lte, pwm_flags, - &pwm_hdr); + if (found_lte->resource_location != RESOURCE_NONEXISTENT) + lte_unbind_wim_resource_spec(found_lte); + ret = read_pwm_stream_header(ctx->wim, found_lte, rspec, + pwm_flags, &pwm_hdr); if (ret) { if (ret == WIMLIB_ERR_UNEXPECTED_END_OF_FILE && (ctx->extract_flags & WIMLIB_EXTRACT_FLAG_RESUME)) @@ -1379,23 +1506,64 @@ extract_streams_from_pipe(struct apply_ctx *ctx) } if ((found_lte->resource_location != RESOURCE_NONEXISTENT) - && !(found_lte->resource_entry.flags & WIM_RESHDR_FLAG_METADATA) - && (needed_lte = __lookup_resource(lookup_table, found_lte->hash)) + && !(found_lte->flags & WIM_RESHDR_FLAG_METADATA) + && (needed_lte = lookup_resource(lookup_table, found_lte->hash)) && (needed_lte->out_refcnt)) { - copy_resource_entry(&needed_lte->resource_entry, - &found_lte->resource_entry); - needed_lte->resource_location = found_lte->resource_location; - needed_lte->wim = found_lte->wim; - needed_lte->compression_type = found_lte->compression_type; - needed_lte->is_pipable = found_lte->is_pipable; - - ret = extract_stream_instances(needed_lte, ctx, false); + tchar *tmpfile_name = NULL; + struct wim_lookup_table_entry *lte_override; + struct wim_lookup_table_entry tmpfile_lte; + + needed_lte->offset_in_res = found_lte->offset_in_res; + needed_lte->flags = found_lte->flags; + needed_lte->size = found_lte->size; + + lte_unbind_wim_resource_spec(found_lte); + lte_bind_wim_resource_spec(needed_lte, rspec); + + if (needed_lte->out_refcnt > 1) { + + struct filedes tmpfile_fd; + + /* Extract stream to temporary file. */ + ret = create_temporary_file(&tmpfile_fd, &tmpfile_name); + if (ret) + goto out_free_found_lte; + + ret = extract_full_stream_to_fd(needed_lte, + &tmpfile_fd); + if (ret) { + filedes_close(&tmpfile_fd); + goto delete_tmpfile; + } + + if (filedes_close(&tmpfile_fd)) { + ERROR_WITH_ERRNO("Error writing to temporary " + "file \"%"TS"\"", tmpfile_name); + ret = WIMLIB_ERR_WRITE; + goto delete_tmpfile; + } + memcpy(&tmpfile_lte, needed_lte, + sizeof(struct wim_lookup_table_entry)); + tmpfile_lte.resource_location = RESOURCE_IN_FILE_ON_DISK; + tmpfile_lte.file_on_disk = tmpfile_name; + lte_override = &tmpfile_lte; + } else { + lte_override = needed_lte; + } + + ret = extract_stream_instances(needed_lte, lte_override, ctx); + delete_tmpfile: + lte_unbind_wim_resource_spec(needed_lte); + if (tmpfile_name) { + tunlink(tmpfile_name); + FREE(tmpfile_name); + } if (ret) goto out_free_found_lte; ctx->num_streams_remaining--; } else if (found_lte->resource_location != RESOURCE_NONEXISTENT) { - ret = skip_pwm_stream(found_lte); + ret = skip_wim_stream(found_lte); if (ret) goto out_free_found_lte; } else { @@ -1422,6 +1590,8 @@ extract_streams_from_pipe(struct apply_ctx *ctx) } ret = 0; out_free_found_lte: + if (found_lte->resource_location != RESOURCE_IN_WIM) + FREE(rspec); free_lookup_table_entry(found_lte); out: return ret; @@ -1447,6 +1617,13 @@ dentry_extract_final(struct wim_dentry *dentry, void *_ctx) if (ret) return ret; + if (ctx->ops->requires_final_set_attributes_pass) { + /* Set file attributes (if supported). */ + ret = extract_file_attributes(path, ctx, dentry, 1); + if (ret) + return ret; + } + return extract_timestamps(path, ctx, dentry); } @@ -1474,8 +1651,7 @@ extract_dentry_to_stdout(struct wim_dentry *dentry) if (lte) { struct filedes _stdout; filedes_init(&_stdout, STDOUT_FILENO); - ret = extract_wim_resource_to_fd(lte, &_stdout, - wim_resource_size(lte)); + ret = extract_full_stream_to_fd(lte, &_stdout); } } return ret; @@ -1584,38 +1760,36 @@ dentry_calculate_extraction_path(struct wim_dentry *dentry, void *_args) goto skip_dentry; } -#ifdef __WIN32__ if (!ctx->ops->supports_case_sensitive_filenames) { struct wim_dentry *other; list_for_each_entry(other, &dentry->case_insensitive_conflict_list, case_insensitive_conflict_list) { - if (ctx->extract_flags & - WIMLIB_EXTRACT_FLAG_ALL_CASE_CONFLICTS) { - WARNING("\"%"TS"\" has the same " - "case-insensitive name as " - "\"%"TS"\"; extracting " - "dummy name instead", - dentry_full_path(dentry), - dentry_full_path(other)); - goto out_replace; - } else { - WARNING("Not extracting \"%"TS"\": " - "has same case-insensitive " - "name as \"%"TS"\"", - dentry_full_path(dentry), - dentry_full_path(other)); - goto skip_dentry; + if (!other->extraction_skipped) { + if (ctx->extract_flags & + WIMLIB_EXTRACT_FLAG_ALL_CASE_CONFLICTS) { + WARNING("\"%"TS"\" has the same " + "case-insensitive name as " + "\"%"TS"\"; extracting " + "dummy name instead", + dentry_full_path(dentry), + dentry_full_path(other)); + goto out_replace; + } else { + WARNING("Not extracting \"%"TS"\": " + "has same case-insensitive " + "name as \"%"TS"\"", + dentry_full_path(dentry), + dentry_full_path(other)); + goto skip_dentry; + } } } } -#else /* __WIN32__ */ - wimlib_assert(ctx->ops->supports_case_sensitive_filenames); -#endif /* !__WIN32__ */ if (file_name_valid(dentry->file_name, dentry->file_name_nbytes / 2, false)) { -#ifdef __WIN32__ +#if TCHAR_IS_UTF16LE dentry->extraction_name = dentry->file_name; dentry->extraction_name_nchars = dentry->file_name_nbytes / 2; return 0; @@ -1650,7 +1824,7 @@ out_replace: tchar *tchar_name; size_t tchar_nchars; - #ifdef __WIN32__ + #if TCHAR_IS_UTF16LE tchar_name = utf16_name_copy; tchar_nchars = dentry->file_name_nbytes / 2; #else @@ -1667,7 +1841,7 @@ out_replace: fixed_name_num_chars += tsprintf(fixed_name + tchar_nchars, T(" (invalid filename #%lu)"), ++ctx->invalid_sequence); - #ifndef __WIN32__ + #if !TCHAR_IS_UTF16LE FREE(tchar_name); #endif dentry->extraction_name = memdup(fixed_name, @@ -1689,6 +1863,7 @@ dentry_reset_needs_extraction(struct wim_dentry *dentry, void *_ignore) { struct wim_inode *inode = dentry->d_inode; + dentry->in_extraction_tree = 0; dentry->extraction_skipped = 0; dentry->was_hardlinked = 0; dentry->skeleton_extracted = 0; @@ -1709,6 +1884,9 @@ dentry_tally_features(struct wim_dentry *dentry, void *_features) struct wim_features *features = _features; struct wim_inode *inode = dentry->d_inode; + if (dentry->extraction_skipped) + return 0; + if (inode->i_attributes & FILE_ATTRIBUTE_ARCHIVE) features->archive_files++; if (inode->i_attributes & FILE_ATTRIBUTE_HIDDEN) @@ -1717,8 +1895,12 @@ dentry_tally_features(struct wim_dentry *dentry, void *_features) features->system_files++; if (inode->i_attributes & FILE_ATTRIBUTE_COMPRESSED) features->compressed_files++; - if (inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED) - features->encrypted_files++; + if (inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED) { + if (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY) + features->encrypted_directories++; + else + features->encrypted_files++; + } if (inode->i_attributes & FILE_ATTRIBUTE_NOT_CONTENT_INDEXED) features->not_context_indexed_files++; if (inode->i_attributes & FILE_ATTRIBUTE_SPARSE_FILE) @@ -1744,20 +1926,42 @@ dentry_tally_features(struct wim_dentry *dentry, void *_features) return 0; } -static int -dentry_clear_inode_visited(struct wim_dentry *dentry, void *_ignore) -{ - dentry->d_inode->i_visited = 0; - return 0; -} - /* Tally the features necessary to extract a dentry tree. */ static void dentry_tree_get_features(struct wim_dentry *root, struct wim_features *features) { memset(features, 0, sizeof(struct wim_features)); for_dentry_in_tree(root, dentry_tally_features, features); - for_dentry_in_tree(root, dentry_clear_inode_visited, NULL); + dentry_tree_clear_inode_visited(root); +} + +static u32 +compute_supported_attributes_mask(const struct wim_features *supported_features) +{ + u32 mask = ~(u32)0; + + if (!supported_features->archive_files) + mask &= ~FILE_ATTRIBUTE_ARCHIVE; + + if (!supported_features->hidden_files) + mask &= ~FILE_ATTRIBUTE_HIDDEN; + + if (!supported_features->system_files) + mask &= ~FILE_ATTRIBUTE_SYSTEM; + + if (!supported_features->not_context_indexed_files) + mask &= ~FILE_ATTRIBUTE_NOT_CONTENT_INDEXED; + + if (!supported_features->compressed_files) + mask &= ~FILE_ATTRIBUTE_COMPRESSED; + + if (!supported_features->sparse_files) + mask &= ~FILE_ATTRIBUTE_SPARSE_FILE; + + if (!supported_features->reparse_points) + mask &= ~FILE_ATTRIBUTE_REPARSE_POINT; + + return mask; } static int @@ -1765,148 +1969,161 @@ do_feature_check(const struct wim_features *required_features, const struct wim_features *supported_features, int extract_flags, const struct apply_operations *ops, - const tchar *wim_source_path) + const tchar *wim_source_path, + bool warn) { const tchar *loc; - const tchar *mode = "this extraction mode"; + const tchar *mode = T("this extraction mode"); if (wim_source_path[0] == '\0') - loc = "the WIM image"; + loc = T("the WIM image"); else loc = wim_source_path; - /* We're an archive program, so theoretically we can do what we want - * with FILE_ATTRIBUTE_ARCHIVE (which is a dumb flag anyway). Don't - * bother the user about it. */ + if (warn) { + /* We're an archive program, so theoretically we can do what we want + * with FILE_ATTRIBUTE_ARCHIVE (which is a dumb flag anyway). Don't + * bother the user about it. */ #if 0 - if (required_features->archive_files && !supported_features->archive_files) - { - WARNING( - "%lu files in %"TS" are marked as archived, but this attribute\n" -" is not supported in %"TS".", - required_features->archive_files, loc, mode); - } + if (required_features->archive_files && !supported_features->archive_files) + { + WARNING( + "%lu files in %"TS" are marked as archived, but this attribute\n" + " is not supported in %"TS".", + required_features->archive_files, loc, mode); + } #endif - if (required_features->hidden_files && !supported_features->hidden_files) - { - WARNING( - "%lu files in %"TS" are marked as hidden, but this\n" -" attribute is not supported in %"TS".", - required_features->hidden_files, loc, mode); - } + if (required_features->hidden_files && !supported_features->hidden_files) + { + WARNING( + "%lu files in %"TS" are marked as hidden, but this\n" + " attribute is not supported in %"TS".", + required_features->hidden_files, loc, mode); + } - if (required_features->system_files && !supported_features->system_files) - { - WARNING( - "%lu files in %"TS" are marked as system files,\n" -" but this attribute is not supported in %"TS".", - required_features->system_files, loc, mode); - } + if (required_features->system_files && !supported_features->system_files) + { + WARNING( + "%lu files in %"TS" are marked as system files,\n" + " but this attribute is not supported in %"TS".", + required_features->system_files, loc, mode); + } - if (required_features->compressed_files && !supported_features->compressed_files) - { - WARNING( - "%lu files in %"TS" are marked as being transparently\n" -" compressed, but transparent compression is not supported in\n" -" %"TS". These files will be extracted as uncompressed.", - required_features->compressed_files, loc, mode); - } + if (required_features->compressed_files && !supported_features->compressed_files) + { + WARNING( + "%lu files in %"TS" are marked as being transparently\n" + " compressed, but transparent compression is not supported in\n" + " %"TS". These files will be extracted as uncompressed.", + required_features->compressed_files, loc, mode); + } - if (required_features->encrypted_files && !supported_features->encrypted_files) - { - WARNING( - "%lu files in %"TS" are marked as being encrypted,\n" -" but encryption is not supported in %"TS". These files\n" -" will be extracted as raw encrypted data instead.", - required_features->encrypted_files, loc, mode); - } + if (required_features->encrypted_files && !supported_features->encrypted_files) + { + WARNING( + "%lu files in %"TS" are marked as being encrypted,\n" + " but encryption is not supported in %"TS". These files\n" + " will not be extracted.", + required_features->encrypted_files, loc, mode); + } - if (required_features->not_context_indexed_files && - !supported_features->not_context_indexed_files) - { - WARNING( - "%lu files in %"TS" are marked as not content indexed,\n" -" but this attribute is not supported in %"TS".", - required_features->not_context_indexed_files, loc, mode); - } + if (required_features->encrypted_directories && + !supported_features->encrypted_directories) + { + WARNING( + "%lu directories in %"TS" are marked as being encrypted,\n" + " but encryption is not supported in %"TS".\n" + " These directories will be extracted as unencrypted.", + required_features->encrypted_directories, loc, mode); + } - if (required_features->sparse_files && !supported_features->sparse_files) - { - WARNING( - "%lu files in %"TS" are marked as sparse, but creating\n" -" sparse files is not supported in %"TS". These files\n" -" will be extracted as non-sparse.", - required_features->sparse_files, loc, mode); - } + if (required_features->not_context_indexed_files && + !supported_features->not_context_indexed_files) + { + WARNING( + "%lu files in %"TS" are marked as not content indexed,\n" + " but this attribute is not supported in %"TS".", + required_features->not_context_indexed_files, loc, mode); + } - if (required_features->named_data_streams && - !supported_features->named_data_streams) - { - WARNING( - "%lu files in %"TS" contain one or more alternate (named)\n" -" data streams, which are not supported in %"TS".\n" -" Alternate data streams will NOT be extracted.", - required_features->named_data_streams, loc, mode); - } + if (required_features->sparse_files && !supported_features->sparse_files) + { + WARNING( + "%lu files in %"TS" are marked as sparse, but creating\n" + " sparse files is not supported in %"TS". These files\n" + " will be extracted as non-sparse.", + required_features->sparse_files, loc, mode); + } - if (unlikely(extract_flags & (WIMLIB_EXTRACT_FLAG_HARDLINK | - WIMLIB_EXTRACT_FLAG_SYMLINK)) && - required_features->named_data_streams && - supported_features->named_data_streams) - { - WARNING( - "%lu files in %"TS" contain one or more alternate (named)\n" -" data streams, which are not supported in linked extraction mode.\n" -" Alternate data streams will NOT be extracted.", - required_features->named_data_streams, loc); - } + if (required_features->named_data_streams && + !supported_features->named_data_streams) + { + WARNING( + "%lu files in %"TS" contain one or more alternate (named)\n" + " data streams, which are not supported in %"TS".\n" + " Alternate data streams will NOT be extracted.", + required_features->named_data_streams, loc, mode); + } - if (required_features->hard_links && !supported_features->hard_links) - { - WARNING( - "%lu files in %"TS" are hard links, but hard links are\n" -" not supported in %"TS". Hard links will be extracted as\n" -" duplicate copies of the linked files.", - required_features->hard_links, loc, mode); - } + if (unlikely(extract_flags & (WIMLIB_EXTRACT_FLAG_HARDLINK | + WIMLIB_EXTRACT_FLAG_SYMLINK)) && + required_features->named_data_streams && + supported_features->named_data_streams) + { + WARNING( + "%lu files in %"TS" contain one or more alternate (named)\n" + " data streams, which are not supported in linked extraction mode.\n" + " Alternate data streams will NOT be extracted.", + required_features->named_data_streams, loc); + } - if (required_features->reparse_points && !supported_features->reparse_points) - { - if (supported_features->symlink_reparse_points) { - if (required_features->other_reparse_points) { + if (required_features->hard_links && !supported_features->hard_links) + { + WARNING( + "%lu files in %"TS" are hard links, but hard links are\n" + " not supported in %"TS". Hard links will be extracted as\n" + " duplicate copies of the linked files.", + required_features->hard_links, loc, mode); + } + + if (required_features->reparse_points && !supported_features->reparse_points) + { + if (supported_features->symlink_reparse_points) { + if (required_features->other_reparse_points) { + WARNING( + "%lu files in %"TS" are reparse points that are neither\n" + " symbolic links nor junction points and are not supported in\n" + " %"TS". These reparse points will not be extracted.", + required_features->other_reparse_points, loc, + mode); + } + } else { WARNING( - "%lu files in %"TS" are reparse points that are neither\n" -" symbolic links nor junction points and are not supported in\n" -" %"TS". These reparse points will not be extracted.", - required_features->other_reparse_points, loc, - mode); + "%lu files in %"TS" are reparse points, which are\n" + " not supported in %"TS" and will not be extracted.", + required_features->reparse_points, loc, mode); } - } else { - WARNING( - "%lu files in %"TS" are reparse points, which are\n" -" not supported in %"TS" and will not be extracted.", - required_features->reparse_points, loc, mode); } - } - if (required_features->security_descriptors && - !supported_features->security_descriptors) - { - WARNING( - "%lu files in %"TS" have Windows NT security descriptors,\n" -" but extracting security descriptors is not supported in\n" -" %"TS". No security descriptors will be extracted.", - required_features->security_descriptors, loc, mode); - } + if (required_features->security_descriptors && + !supported_features->security_descriptors) + { + WARNING( + "%lu files in %"TS" have Windows NT security descriptors,\n" + " but extracting security descriptors is not supported in\n" + " %"TS". No security descriptors will be extracted.", + required_features->security_descriptors, loc, mode); + } - if (required_features->short_names && !supported_features->short_names) - { - WARNING( - "%lu files in %"TS" have short (DOS) names, but\n" -" extracting short names is not supported in %"TS".\n" -" Short names will not be extracted.\n", - required_features->short_names, loc, mode); + if (required_features->short_names && !supported_features->short_names) + { + WARNING( + "%lu files in %"TS" have short (DOS) names, but\n" + " extracting short names is not supported in %"TS".\n" + " Short names will not be extracted.\n", + required_features->short_names, loc, mode); + } } if ((extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA) && @@ -1965,54 +2182,63 @@ do_feature_check(const struct wim_features *required_features, return 0; } -/* - * extract_tree - Extract a file or directory tree from the currently selected - * WIM image. - * - * @wim: WIMStruct for the WIM file, with the desired image selected - * (as wim->current_image). - * - * @wim_source_path: - * "Canonical" (i.e. no leading or trailing slashes, path - * separators WIM_PATH_SEPARATOR) path inside the WIM image to - * extract. An empty string means the full image. - * - * @target: - * Filesystem path to extract the file or directory tree to. - * (Or, with WIMLIB_EXTRACT_FLAG_NTFS: the name of a NTFS volume.) - * - * @extract_flags: - * WIMLIB_EXTRACT_FLAG_*. Also, the private flag - * WIMLIB_EXTRACT_FLAG_MULTI_IMAGE will be set if this is being - * called through wimlib_extract_image() with WIMLIB_ALL_IMAGES as - * the image. - * - * @progress_func: - * If non-NULL, progress function for the extraction. The messages - * that may be sent in this function are: - * - * WIMLIB_PROGRESS_MSG_EXTRACT_TREE_BEGIN or - * WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_BEGIN; - * WIMLIB_PROGRESS_MSG_EXTRACT_DIR_STRUCTURE_BEGIN; - * WIMLIB_PROGRESS_MSG_EXTRACT_DIR_STRUCTURE_END; - * WIMLIB_PROGRESS_MSG_EXTRACT_DENTRY; - * WIMLIB_PROGRESS_MSG_EXTRACT_STREAMS; - * WIMLIB_PROGRESS_MSG_APPLY_TIMESTAMPS; - * WIMLIB_PROGRESS_MSG_EXTRACT_TREE_END or - * WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_END. - * - * Returns 0 on success; a positive WIMLIB_ERR_* code on failure. - */ +static void +do_extract_warnings(struct apply_ctx *ctx) +{ + if (ctx->partial_security_descriptors == 0 && + ctx->no_security_descriptors == 0) + return; + + WARNING("Extraction to \"%"TS"\" complete, but with one or more warnings:", + ctx->target); + if (ctx->partial_security_descriptors != 0) { + WARNING("- Could only partially set the security descriptor\n" + " on %lu files or directories.", + ctx->partial_security_descriptors); + } + if (ctx->no_security_descriptors != 0) { + WARNING("- Could not set security descriptor at all\n" + " on %lu files or directories.", + ctx->no_security_descriptors); + } +#ifdef __WIN32__ + WARNING("To fully restore all security descriptors, run the program\n" + " with Administrator rights."); +#endif +} + static int -extract_tree(WIMStruct *wim, const tchar *wim_source_path, const tchar *target, - int extract_flags, wimlib_progress_func_t progress_func) +dentry_set_skipped(struct wim_dentry *dentry, void *_ignore) +{ + dentry->in_extraction_tree = 1; + dentry->extraction_skipped = 1; + return 0; +} + +static int +dentry_set_not_skipped(struct wim_dentry *dentry, void *_ignore) +{ + dentry->in_extraction_tree = 1; + dentry->extraction_skipped = 0; + return 0; +} + +static int +extract_trees(WIMStruct *wim, struct wim_dentry **trees, size_t num_trees, + const tchar *wim_source_path, const tchar *target, + int extract_flags, wimlib_progress_func_t progress_func) { - struct wim_dentry *root; struct wim_features required_features; struct apply_ctx ctx; int ret; struct wim_lookup_table_entry *lte; + wimlib_assert(num_trees != 0); + wimlib_assert(target != NULL); + + if (num_trees > 1) + wimlib_assert((extract_flags & WIMLIB_EXTRACT_FLAG_PATHMODE)); + /* Start initializing the apply_ctx. */ memset(&ctx, 0, sizeof(struct apply_ctx)); ctx.wim = wim; @@ -2032,19 +2258,32 @@ extract_tree(WIMStruct *wim, const tchar *wim_source_path, const tchar *target, } INIT_LIST_HEAD(&ctx.stream_list); - /* Translate the path to extract into the corresponding - * `struct wim_dentry', which will be the root of the - * "dentry tree" to extract. */ - root = get_dentry(wim, wim_source_path); - if (!root) { - ERROR("Path \"%"TS"\" does not exist in WIM image %d", - wim_source_path, wim->current_image); - ret = WIMLIB_ERR_PATH_DOES_NOT_EXIST; - goto out; + if (extract_flags & WIMLIB_EXTRACT_FLAG_PATHMODE) { + /* Path mode --- there may be multiple trees, and targets are + * set relative to the root of the image. + * + * Consider all dentries to be in the extraction tree, but + * assume all to be skipped unless in one of the subtrees being + * extracted or one of the ancestors of the subtrees up to the + * image root. */ + ctx.extract_root = wim_root_dentry(wim); + for_dentry_in_tree(ctx.extract_root, dentry_set_skipped, NULL); + + for (size_t i = 0; i < num_trees; i++) { + struct wim_dentry *d; + + for_dentry_in_tree(trees[i], dentry_set_not_skipped, NULL); + d = trees[i]; + while (d != ctx.extract_root) { + d = d->parent; + dentry_set_not_skipped(d, NULL); + } + } + } else { + ctx.extract_root = trees[0]; + for_dentry_in_tree(ctx.extract_root, dentry_set_not_skipped, NULL); } - ctx.extract_root = root; - /* Select the appropriate apply_operations based on the * platform and extract_flags. */ #ifdef __WIN32__ @@ -2069,14 +2308,20 @@ extract_tree(WIMStruct *wim, const tchar *wim_source_path, const tchar *target, */ ret = ctx.ops->start_extract(target, &ctx); if (ret) - goto out; + goto out_dentry_reset_needs_extraction; - dentry_tree_get_features(root, &required_features); + /* Get and check the features required to extract the dentry tree. */ + dentry_tree_get_features(ctx.extract_root, &required_features); ret = do_feature_check(&required_features, &ctx.supported_features, - extract_flags, ctx.ops, wim_source_path); + extract_flags, ctx.ops, + wim_source_path, + !(extract_flags & WIMLIB_EXTRACT_FLAG_PATHMODE)); if (ret) goto out_finish_or_abort_extract; + ctx.supported_attributes_mask = + compute_supported_attributes_mask(&ctx.supported_features); + /* Figure out whether the root dentry is being extracted to the root of * a volume and therefore needs to be treated "specially", for example * not being explicitly created and not having attributes set. */ @@ -2085,8 +2330,9 @@ extract_tree(WIMStruct *wim, const tchar *wim_source_path, const tchar *target, /* Calculate the actual filename component of each extracted dentry. In * the process, set the dentry->extraction_skipped flag on dentries that - * are being skipped for some reason (e.g. invalid filename). */ - ret = for_dentry_in_tree(root, dentry_calculate_extraction_path, &ctx); + * are being skipped because of filename or supported features problems. */ + ret = for_dentry_in_tree(ctx.extract_root, + dentry_calculate_extraction_path, &ctx); if (ret) goto out_dentry_reset_needs_extraction; @@ -2128,25 +2374,10 @@ extract_tree(WIMStruct *wim, const tchar *wim_source_path, const tchar *target, * directory tree. (If not, extract_dentry_to_stdout() will * return an error.) */ if (extract_flags & WIMLIB_EXTRACT_FLAG_TO_STDOUT) { - ret = extract_dentry_to_stdout(root); + ret = extract_dentry_to_stdout(ctx.extract_root); goto out_teardown_stream_list; } - /* If a sequential extraction was specified, sort the streams to be - * extracted by their position in the WIM file so that the WIM file can - * be read sequentially. */ - if ((extract_flags & (WIMLIB_EXTRACT_FLAG_SEQUENTIAL | - WIMLIB_EXTRACT_FLAG_FROM_PIPE)) - == WIMLIB_EXTRACT_FLAG_SEQUENTIAL) - { - ret = sort_stream_list_by_sequential_order( - &ctx.stream_list, - offsetof(struct wim_lookup_table_entry, - extraction_list)); - if (ret) - goto out_teardown_stream_list; - } - if (ctx.ops->realpath_works_on_nonexisting_files && ((extract_flags & WIMLIB_EXTRACT_FLAG_RPFIX) || ctx.ops->requires_realtarget_in_paths)) @@ -2160,17 +2391,20 @@ extract_tree(WIMStruct *wim, const tchar *wim_source_path, const tchar *target, } if (progress_func) { - progress_func(*wim_source_path ? WIMLIB_PROGRESS_MSG_EXTRACT_TREE_BEGIN : - WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_BEGIN, - &ctx.progress); + int msg; + if (*wim_source_path || (extract_flags & WIMLIB_EXTRACT_FLAG_PATHMODE)) + msg = WIMLIB_PROGRESS_MSG_EXTRACT_TREE_BEGIN; + else + msg = WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_BEGIN; + progress_func(msg, &ctx.progress); } if (!ctx.root_dentry_is_special) { tchar path[ctx.ops->path_max]; - if (build_extraction_path(path, root, &ctx)) + if (build_extraction_path(path, ctx.extract_root, &ctx)) { - ret = extract_inode(path, &ctx, root->d_inode); + ret = extract_inode(path, &ctx, ctx.extract_root->d_inode); if (ret) goto out_free_realtarget; } @@ -2196,9 +2430,15 @@ extract_tree(WIMStruct *wim, const tchar *wim_source_path, const tchar *target, ctx.realtarget_nchars = tstrlen(ctx.realtarget); } + if (ctx.ops->requires_short_name_reordering) { + ret = for_dentry_in_tree(ctx.extract_root, dentry_extract_dir_skeleton, + &ctx); + if (ret) + goto out_free_realtarget; + } + /* Finally, the important part: extract the tree of files. */ - if (extract_flags & (WIMLIB_EXTRACT_FLAG_SEQUENTIAL | - WIMLIB_EXTRACT_FLAG_FROM_PIPE)) { + if (!(extract_flags & WIMLIB_EXTRACT_FLAG_FILE_ORDER)) { /* Sequential extraction requested, so two passes are needed * (one for directory structure, one for streams.) */ if (progress_func) @@ -2206,7 +2446,7 @@ extract_tree(WIMStruct *wim, const tchar *wim_source_path, const tchar *target, &ctx.progress); if (!(extract_flags & WIMLIB_EXTRACT_FLAG_RESUME)) { - ret = for_dentry_in_tree(root, dentry_extract_skeleton, &ctx); + ret = for_dentry_in_tree(ctx.extract_root, dentry_extract_skeleton, &ctx); if (ret) goto out_free_realtarget; } @@ -2226,7 +2466,7 @@ extract_tree(WIMStruct *wim, const tchar *wim_source_path, const tchar *target, if (progress_func) progress_func(WIMLIB_PROGRESS_MSG_EXTRACT_DIR_STRUCTURE_BEGIN, &ctx.progress); - ret = for_dentry_in_tree(root, dentry_extract, &ctx); + ret = for_dentry_in_tree(ctx.extract_root, dentry_extract, &ctx); if (ret) goto out_free_realtarget; if (progress_func) @@ -2258,28 +2498,31 @@ extract_tree(WIMStruct *wim, const tchar *wim_source_path, const tchar *target, if (progress_func) progress_func(WIMLIB_PROGRESS_MSG_APPLY_TIMESTAMPS, &ctx.progress); - ret = for_dentry_in_tree_depth(root, dentry_extract_final, &ctx); + ret = for_dentry_in_tree_depth(ctx.extract_root, dentry_extract_final, &ctx); if (ret) goto out_free_realtarget; if (progress_func) { - progress_func(*wim_source_path ? WIMLIB_PROGRESS_MSG_EXTRACT_TREE_END : - WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_END, - &ctx.progress); + int msg; + if (*wim_source_path || (extract_flags & WIMLIB_EXTRACT_FLAG_PATHMODE)) + msg = WIMLIB_PROGRESS_MSG_EXTRACT_TREE_END; + else + msg = WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_END; + progress_func(msg, &ctx.progress); } + do_extract_warnings(&ctx); + ret = 0; out_free_realtarget: FREE(ctx.realtarget); out_teardown_stream_list: /* Free memory allocated as part of the mapping from each * wim_lookup_table_entry to the dentries that reference it. */ - if (ctx.extract_flags & WIMLIB_EXTRACT_FLAG_SEQUENTIAL) + if (!(ctx.extract_flags & WIMLIB_EXTRACT_FLAG_FILE_ORDER)) list_for_each_entry(lte, &ctx.stream_list, extraction_list) if (lte->out_refcnt > ARRAY_LEN(lte->inline_lte_dentries)) FREE(lte->lte_dentries); -out_dentry_reset_needs_extraction: - for_dentry_in_tree(root, dentry_reset_needs_extraction, NULL); out_finish_or_abort_extract: if (ret) { if (ctx.ops->abort_extract) @@ -2288,23 +2531,73 @@ out_finish_or_abort_extract: if (ctx.ops->finish_extract) ret = ctx.ops->finish_extract(&ctx); } -out: +out_dentry_reset_needs_extraction: + for_dentry_in_tree(ctx.extract_root, dentry_reset_needs_extraction, NULL); return ret; } -/* Validates a single wimlib_extract_command, mostly checking to make sure the - * extract flags make sense. */ +/* + * extract_tree - Extract a file or directory tree from the currently selected + * WIM image. + * + * @wim: WIMStruct for the WIM file, with the desired image selected + * (as wim->current_image). + * + * @wim_source_path: + * "Canonical" (i.e. no leading or trailing slashes, path + * separators WIM_PATH_SEPARATOR) path inside the WIM image to + * extract. An empty string means the full image. + * + * @target: + * Filesystem path to extract the file or directory tree to. + * (Or, with WIMLIB_EXTRACT_FLAG_NTFS: the name of a NTFS volume.) + * + * @extract_flags: + * WIMLIB_EXTRACT_FLAG_*. Also, the private flag + * WIMLIB_EXTRACT_FLAG_MULTI_IMAGE will be set if this is being + * called through wimlib_extract_image() with WIMLIB_ALL_IMAGES as + * the image. + * + * @progress_func: + * If non-NULL, progress function for the extraction. The messages + * that may be sent in this function are: + * + * WIMLIB_PROGRESS_MSG_EXTRACT_TREE_BEGIN or + * WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_BEGIN; + * WIMLIB_PROGRESS_MSG_EXTRACT_DIR_STRUCTURE_BEGIN; + * WIMLIB_PROGRESS_MSG_EXTRACT_DIR_STRUCTURE_END; + * WIMLIB_PROGRESS_MSG_EXTRACT_DENTRY; + * WIMLIB_PROGRESS_MSG_EXTRACT_STREAMS; + * WIMLIB_PROGRESS_MSG_APPLY_TIMESTAMPS; + * WIMLIB_PROGRESS_MSG_EXTRACT_TREE_END or + * WIMLIB_PROGRESS_MSG_EXTRACT_IMAGE_END. + * + * Returns 0 on success; a positive WIMLIB_ERR_* code on failure. + */ static int -check_extract_command(struct wimlib_extract_command *cmd, int wim_header_flags) +extract_tree(WIMStruct *wim, const tchar *wim_source_path, + const tchar *target, int extract_flags, + wimlib_progress_func_t progress_func) { - int extract_flags; + struct wim_dentry *root; - /* Empty destination path? */ - if (cmd->fs_dest_path[0] == T('\0')) - return WIMLIB_ERR_INVALID_PARAM; + root = get_dentry(wim, wim_source_path, WIMLIB_CASE_PLATFORM_DEFAULT); - extract_flags = cmd->extract_flags; + if (root == NULL) { + ERROR("Path \"%"TS"\" does not exist in WIM image %d", + wim_source_path, wim->current_image); + return WIMLIB_ERR_PATH_DOES_NOT_EXIST; + } + return extract_trees(wim, &root, 1, wim_source_path, + target, extract_flags, progress_func); +} +/* Make sure the extraction flags make sense, and update them if needed. */ +static int +check_extract_flags(int extract_flags, + const u32 wim_header_flags, + int *updated_extract_flags_ret) +{ /* Check for invalid flag combinations */ if ((extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | @@ -2329,13 +2622,13 @@ check_extract_command(struct wimlib_extract_command *cmd, int wim_header_flags) WIMLIB_EXTRACT_FLAG_FROM_PIPE)) == WIMLIB_EXTRACT_FLAG_RESUME) return WIMLIB_ERR_INVALID_PARAM; - if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) { #ifndef WITH_NTFS_3G + if (extract_flags & WIMLIB_EXTRACT_FLAG_NTFS) { ERROR("wimlib was compiled without support for NTFS-3g, so\n" " we cannot apply a WIM image directly to a NTFS volume."); return WIMLIB_ERR_UNSUPPORTED; -#endif } +#endif if ((extract_flags & (WIMLIB_EXTRACT_FLAG_RPFIX | WIMLIB_EXTRACT_FLAG_NORPFIX)) == 0) @@ -2351,9 +2644,8 @@ check_extract_command(struct wimlib_extract_command *cmd, int wim_header_flags) * corresponding file or symbolic link data. This needs to be handled * better. */ if ((extract_flags & (WIMLIB_EXTRACT_FLAG_UNIX_DATA | - WIMLIB_EXTRACT_FLAG_SEQUENTIAL)) - == (WIMLIB_EXTRACT_FLAG_UNIX_DATA | - WIMLIB_EXTRACT_FLAG_SEQUENTIAL)) + WIMLIB_EXTRACT_FLAG_FILE_ORDER)) + == WIMLIB_EXTRACT_FLAG_UNIX_DATA) { if (extract_flags & WIMLIB_EXTRACT_FLAG_FROM_PIPE) { WARNING("Setting UNIX file/owner group may " @@ -2361,13 +2653,14 @@ check_extract_command(struct wimlib_extract_command *cmd, int wim_header_flags) " symbolic links " "when applying from a pipe."); } else { - extract_flags &= ~WIMLIB_EXTRACT_FLAG_SEQUENTIAL; + extract_flags |= WIMLIB_EXTRACT_FLAG_FILE_ORDER; WARNING("Disabling sequential extraction for " "UNIX data mode"); } } - cmd->extract_flags = extract_flags; + if (updated_extract_flags_ret) + *updated_extract_flags_ret = extract_flags; return 0; } @@ -2398,7 +2691,16 @@ do_wimlib_extract_files(WIMStruct *wim, /* Check for problems with the extraction commands */ for (size_t i = 0; i < num_cmds; i++) { - ret = check_extract_command(&cmds[i], wim->hdr.flags); + + if (cmds[i].fs_dest_path[0] == T('\0')) + return WIMLIB_ERR_INVALID_PARAM; + + if (cmds[i].extract_flags & WIMLIB_EXTRACT_FLAG_GLOB_PATHS) + return WIMLIB_ERR_INVALID_PARAM; + + ret = check_extract_flags(cmds[i].extract_flags, + wim->hdr.flags, + &cmds[i].extract_flags); if (ret) return ret; if (cmds[i].extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | @@ -2434,8 +2736,6 @@ wimlib_extract_files(WIMStruct *wim, const struct wimlib_extract_command *cmds, size_t num_cmds, int default_extract_flags, - WIMStruct **additional_swms, - unsigned num_additional_swms, wimlib_progress_func_t progress_func) { int ret; @@ -2444,21 +2744,12 @@ wimlib_extract_files(WIMStruct *wim, default_extract_flags &= WIMLIB_EXTRACT_MASK_PUBLIC; - ret = verify_swm_set(wim, additional_swms, num_additional_swms); - if (ret) - goto out; - if (num_cmds == 0) - goto out; - - if (num_additional_swms) - merge_lookup_tables(wim, additional_swms, num_additional_swms); + return 0; cmds_copy = CALLOC(num_cmds, sizeof(cmds[0])); - if (!cmds_copy) { - ret = WIMLIB_ERR_NOMEM; - goto out_restore_lookup_table; - } + if (!cmds_copy) + return WIMLIB_ERR_NOMEM; for (size_t i = 0; i < num_cmds; i++) { cmds_copy[i].extract_flags = (default_extract_flags | @@ -2495,10 +2786,6 @@ out_free_cmds_copy: FREE(cmds_copy[i].fs_dest_path); } FREE(cmds_copy); -out_restore_lookup_table: - if (num_additional_swms) - unmerge_lookup_table(wim); -out: return ret; } @@ -2525,7 +2812,7 @@ extract_single_image(WIMStruct *wim, int image, { int ret; tchar *target_copy = canonicalize_fs_path(target); - if (!target_copy) + if (target_copy == NULL) return WIMLIB_ERR_NOMEM; struct wimlib_extract_command cmd = { .wim_source_path = T(""), @@ -2619,24 +2906,10 @@ do_wimlib_extract_image(WIMStruct *wim, int image, const tchar *target, int extract_flags, - WIMStruct **additional_swms, - unsigned num_additional_swms, wimlib_progress_func_t progress_func) { int ret; - if (extract_flags & WIMLIB_EXTRACT_FLAG_FROM_PIPE) { - wimlib_assert(wim->hdr.part_number == 1); - wimlib_assert(num_additional_swms == 0); - } else { - ret = verify_swm_set(wim, additional_swms, num_additional_swms); - if (ret) - return ret; - - if (num_additional_swms) - merge_lookup_tables(wim, additional_swms, num_additional_swms); - } - if (image == WIMLIB_ALL_IMAGES) { ret = extract_all_images(wim, target, extract_flags, progress_func); @@ -2652,8 +2925,6 @@ do_wimlib_extract_image(WIMStruct *wim, lte_free_extracted_file, NULL); } - if (num_additional_swms) - unmerge_lookup_table(wim); return ret; } @@ -2674,15 +2945,12 @@ wimlib_extract_image_from_pipe(int pipe_fd, const tchar *image_num_or_name, if (extract_flags & WIMLIB_EXTRACT_FLAG_TO_STDOUT) return WIMLIB_ERR_INVALID_PARAM; - extract_flags |= WIMLIB_EXTRACT_FLAG_SEQUENTIAL; - /* Read the WIM header from the pipe and get a WIMStruct to represent * the pipable WIM. Caveats: Unlike getting a WIMStruct with * wimlib_open_wim(), getting a WIMStruct in this way will result in * an empty lookup table, no XML data read, and no filename set. */ ret = open_wim_as_WIMStruct(&pipe_fd, - WIMLIB_OPEN_FLAG_FROM_PIPE | - WIMLIB_OPEN_FLAG_SPLIT_OK, + WIMLIB_OPEN_FLAG_FROM_PIPE, &pwm, progress_func); if (ret) return ret; @@ -2714,11 +2982,12 @@ wimlib_extract_image_from_pipe(int pipe_fd, const tchar *image_num_or_name, * WIMs.) */ { struct wim_lookup_table_entry xml_lte; - ret = read_pwm_stream_header(pwm, &xml_lte, 0, NULL); + struct wim_resource_spec xml_rspec; + ret = read_pwm_stream_header(pwm, &xml_lte, &xml_rspec, 0, NULL); if (ret) goto out_wimlib_free; - if (!(xml_lte.resource_entry.flags & WIM_RESHDR_FLAG_METADATA)) + if (!(xml_lte.flags & WIM_RESHDR_FLAG_METADATA)) { ERROR("Expected XML data, but found non-metadata " "stream."); @@ -2726,12 +2995,12 @@ wimlib_extract_image_from_pipe(int pipe_fd, const tchar *image_num_or_name, goto out_wimlib_free; } - copy_resource_entry(&pwm->hdr.xml_res_entry, - &xml_lte.resource_entry); + wim_res_spec_to_hdr(&xml_rspec, &pwm->hdr.xml_data_reshdr); ret = read_wim_xml_data(pwm); if (ret) goto out_wimlib_free; + if (wim_info_get_num_images(pwm->wim_info) != pwm->hdr.image_count) { ERROR("Image count in XML data is not the same as in WIM header."); ret = WIMLIB_ERR_XML; @@ -2767,22 +3036,29 @@ wimlib_extract_image_from_pipe(int pipe_fd, const tchar *image_num_or_name, for (i = 1; i <= pwm->hdr.image_count; i++) { struct wim_lookup_table_entry *metadata_lte; struct wim_image_metadata *imd; + struct wim_resource_spec *metadata_rspec; metadata_lte = new_lookup_table_entry(); - if (!metadata_lte) { + if (metadata_lte == NULL) { ret = WIMLIB_ERR_NOMEM; goto out_wimlib_free; } + metadata_rspec = MALLOC(sizeof(struct wim_resource_spec)); + if (metadata_rspec == NULL) { + ret = WIMLIB_ERR_NOMEM; + free_lookup_table_entry(metadata_lte); + goto out_wimlib_free; + } - ret = read_pwm_stream_header(pwm, metadata_lte, 0, NULL); + ret = read_pwm_stream_header(pwm, metadata_lte, metadata_rspec, 0, NULL); imd = pwm->image_metadata[i - 1]; imd->metadata_lte = metadata_lte; - if (ret) + if (ret) { + FREE(metadata_rspec); goto out_wimlib_free; + } - if (!(metadata_lte->resource_entry.flags & - WIM_RESHDR_FLAG_METADATA)) - { + if (!(metadata_lte->flags & WIM_RESHDR_FLAG_METADATA)) { ERROR("Expected metadata resource, but found " "non-metadata stream."); ret = WIMLIB_ERR_INVALID_PIPABLE_WIM; @@ -2799,7 +3075,7 @@ wimlib_extract_image_from_pipe(int pipe_fd, const tchar *image_num_or_name, } else { /* Metadata resource is not for the image being * extracted. Skip over it. */ - ret = skip_pwm_stream(metadata_lte); + ret = skip_wim_stream(metadata_lte); if (ret) goto out_wimlib_free; } @@ -2807,7 +3083,7 @@ wimlib_extract_image_from_pipe(int pipe_fd, const tchar *image_num_or_name, /* Extract the image. */ extract_flags |= WIMLIB_EXTRACT_FLAG_FROM_PIPE; ret = do_wimlib_extract_image(pwm, image, target, - extract_flags, NULL, 0, progress_func); + extract_flags, progress_func); /* Clean up and return. */ out_wimlib_free: wimlib_free(pwm); @@ -2820,12 +3096,165 @@ wimlib_extract_image(WIMStruct *wim, int image, const tchar *target, int extract_flags, - WIMStruct **additional_swms, - unsigned num_additional_swms, wimlib_progress_func_t progress_func) { extract_flags &= WIMLIB_EXTRACT_MASK_PUBLIC; return do_wimlib_extract_image(wim, image, target, extract_flags, - additional_swms, num_additional_swms, progress_func); } + +/* API function documented in wimlib.h */ +WIMLIBAPI int +wimlib_extract_pathlist(WIMStruct *wim, int image, + const tchar *target, + const tchar *path_list_file, + int extract_flags, + wimlib_progress_func_t progress_func) +{ + int ret; + tchar **paths; + size_t num_paths; + void *mem; + + ret = read_path_list_file(path_list_file, &paths, &num_paths, &mem); + if (ret) { + ERROR("Failed to read path list file \"%"TS"\"", + path_list_file); + return ret; + } + + ret = wimlib_extract_paths(wim, image, target, + (const tchar * const *)paths, num_paths, + extract_flags, progress_func); + FREE(paths); + FREE(mem); + return ret; +} + +struct append_dentry_ctx { + struct wim_dentry **dentries; + size_t num_dentries; + size_t num_alloc_dentries; +}; + +static int +append_dentry_cb(struct wim_dentry *dentry, void *_ctx) +{ + struct append_dentry_ctx *ctx = _ctx; + + if (ctx->num_dentries == ctx->num_alloc_dentries) { + struct wim_dentry **new_dentries; + size_t new_length; + + new_length = max(ctx->num_alloc_dentries + 8, + ctx->num_alloc_dentries * 3 / 2); + new_dentries = REALLOC(ctx->dentries, + new_length * sizeof(ctx->dentries[0])); + if (new_dentries == NULL) + return WIMLIB_ERR_NOMEM; + ctx->dentries = new_dentries; + ctx->num_alloc_dentries = new_length; + } + ctx->dentries[ctx->num_dentries++] = dentry; + return 0; +} + +/* API function documented in wimlib.h */ +WIMLIBAPI int +wimlib_extract_paths(WIMStruct *wim, + int image, + const tchar *target, + const tchar * const *paths, + size_t num_paths, + int extract_flags, + wimlib_progress_func_t progress_func) +{ + int ret; + struct append_dentry_ctx append_dentry_ctx = { + .dentries = NULL, + .num_dentries = 0, + .num_alloc_dentries = 0, + }; + struct wim_dentry **trees; + size_t num_trees; + + extract_flags &= WIMLIB_EXTRACT_MASK_PUBLIC; + + if (wim == NULL || target == NULL || target[0] == T('\0') || + (num_paths != 0 && paths == NULL)) + return WIMLIB_ERR_INVALID_PARAM; + + ret = check_extract_flags(extract_flags, wim->hdr.flags, + &extract_flags); + if (ret) + return ret; + + ret = select_wim_image(wim, image); + if (ret) + return ret; + + if (extract_flags & WIMLIB_EXTRACT_FLAG_GLOB_PATHS) { + u32 wildcard_flags = 0; + + if (extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_GLOB) + wildcard_flags |= WILDCARD_FLAG_ERROR_IF_NO_MATCH; + else + wildcard_flags |= WILDCARD_FLAG_WARN_IF_NO_MATCH; + + if (default_ignore_case) + wildcard_flags |= WILDCARD_FLAG_CASE_INSENSITIVE; + + for (size_t i = 0; i < num_paths; i++) { + ret = expand_wildcard(wim, paths[i], + append_dentry_cb, + &append_dentry_ctx, + wildcard_flags); + if (ret) { + trees = append_dentry_ctx.dentries; + goto out_free_trees; + } + } + trees = append_dentry_ctx.dentries; + num_trees = append_dentry_ctx.num_dentries; + } else { + trees = MALLOC(num_paths * sizeof(trees[0])); + if (trees == NULL) + return WIMLIB_ERR_NOMEM; + + for (size_t i = 0; i < num_paths; i++) { + trees[i] = get_dentry(wim, paths[i], + WIMLIB_CASE_PLATFORM_DEFAULT); + if (trees[i] == NULL) { + ERROR("Path \"%"TS"\" does not exist " + "in WIM image %d", + paths[i], wim->current_image); + ret = WIMLIB_ERR_PATH_DOES_NOT_EXIST; + goto out_free_trees; + } + } + num_trees = num_paths; + } + + if (num_trees == 0) { + ret = 0; + goto out_free_trees; + } + + ret = extract_trees(wim, trees, num_trees, + T(""), target, + ((extract_flags & + ~WIMLIB_EXTRACT_FLAG_GLOB_PATHS) + | WIMLIB_EXTRACT_FLAG_PATHMODE), + progress_func); + + if (extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | + WIMLIB_EXTRACT_FLAG_HARDLINK)) + { + for_lookup_table_entry(wim->lookup_table, + lte_free_extracted_file, + NULL); + } +out_free_trees: + FREE(trees); + return ret; +}