+++ /dev/null
-/*
- * modify.c
- *
- * Support for modifying WIM files with image-level operations (delete an image,
- * add an image, export an image from one WIM to another.) There is nothing
- * here that lets you change individual files in the WIM; for that you will need
- * to look at the filesystem implementation in mount.c.
- */
-
-/*
- * Copyright (C) 2012 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 "wimlib_internal.h"
-#include "util.h"
-#include "sha1.h"
-#include "dentry.h"
-#include "xml.h"
-#include "lookup_table.h"
-#include "timestamp.h"
-#include <sys/stat.h>
-#include <dirent.h>
-#include <string.h>
-#include <errno.h>
-#include <fnmatch.h>
-#include <ctype.h>
-#include <unistd.h>
-
-/** Private flag: Used to mark that we currently adding the root directory of
- * the WIM image. */
-#define WIMLIB_ADD_IMAGE_FLAG_ROOT 0x80000000
-
-void destroy_image_metadata(struct image_metadata *imd,
- struct lookup_table *table)
-{
- free_dentry_tree(imd->root_dentry, table);
- free_security_data(imd->security_data);
-
- /* Get rid of the lookup table entry for this image's metadata resource
- * */
- if (table) {
- lookup_table_unlink(table, imd->metadata_lte);
- free_lookup_table_entry(imd->metadata_lte);
- }
-}
-
-/*
- * Recursively builds a dentry tree from a directory tree on disk, outside the
- * WIM file.
- *
- * @root_ret: Place to return a pointer to the root of the dentry tree. Only
- * modified if successful. 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. (Only used in NTFS mode.)
- *
- * @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 build_dentry_tree(struct dentry **root_ret,
- const char *root_disk_path,
- struct 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 stat root_stbuf;
- int ret = 0;
- int (*stat_fn)(const char *restrict, struct stat *restrict);
- struct dentry *root;
- const char *filename;
- struct 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");
- return WIMLIB_ERR_INVALID_CAPTURE_CONFIG;
- }
- 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);
- }
- *root_ret = NULL;
- return 0;
- }
-
- 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);
- }
-
- 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);
- return WIMLIB_ERR_STAT;
- }
-
- if ((add_image_flags & WIMLIB_ADD_IMAGE_FLAG_ROOT) &&
- !S_ISDIR(root_stbuf.st_mode)) {
- ERROR("`%s' is not a directory", root_disk_path);
- return WIMLIB_ERR_NOTDIR;
- }
- 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);
- return WIMLIB_ERR_SPECIAL_FILE;
- }
-
- if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_ROOT)
- filename = "";
- else
- filename = path_basename(root_disk_path);
-
- root = new_dentry_with_timeless_inode(filename);
- if (!root)
- return WIMLIB_ERR_NOMEM;
-
- inode = root->d_inode;
-
-#ifdef HAVE_STAT_NANOSECOND_PRECISION
- inode->creation_time = timespec_to_wim_timestamp(&root_stbuf.st_mtim);
- inode->last_write_time = timespec_to_wim_timestamp(&root_stbuf.st_mtim);
- inode->last_access_time = timespec_to_wim_timestamp(&root_stbuf.st_atim);
-#else
- inode->creation_time = unix_timestamp_to_wim(root_stbuf.st_mtime);
- inode->last_write_time = unix_timestamp_to_wim(root_stbuf.st_mtime);
- inode->last_access_time = unix_timestamp_to_wim(root_stbuf.st_atime);
-#endif
- if (sizeof(ino_t) >= 8)
- inode->ino = (u64)root_stbuf.st_ino;
- else
- inode->ino = (u64)root_stbuf.st_ino |
- ((u64)root_stbuf.st_dev << ((sizeof(ino_t) * 8) & 63));
-
- add_image_flags &= ~WIMLIB_ADD_IMAGE_FLAG_ROOT;
- inode->resolved = true;
-
- if (S_ISREG(root_stbuf.st_mode)) { /* Archiving a regular file */
-
- struct lookup_table_entry *lte;
- u8 hash[SHA1_HASH_SIZE];
-
- inode->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 {
- char *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->lte = lte;
- } else if (S_ISDIR(root_stbuf.st_mode)) { /* Archiving a directory */
-
- inode->attributes = FILE_ATTRIBUTE_DIRECTORY;
-
- DIR *dir;
- struct dirent entry, *result;
- struct 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);
- char 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 = 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->attributes = FILE_ATTRIBUTE_REPARSE_POINT;
- inode->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).
- */
-
- char 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->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;
-}
-
-struct wim_pair {
- WIMStruct *src_wim;
- WIMStruct *dest_wim;
- struct list_head lte_list_head;
-};
-
-static int allocate_lte_if_needed(struct dentry *dentry, void *arg)
-{
- const WIMStruct *src_wim, *dest_wim;
- struct list_head *lte_list_head;
- struct inode *inode;
-
- src_wim = ((struct wim_pair*)arg)->src_wim;
- dest_wim = ((struct wim_pair*)arg)->dest_wim;
- lte_list_head = &((struct wim_pair*)arg)->lte_list_head;
- inode = dentry->d_inode;
-
- wimlib_assert(!inode->resolved);
-
- for (unsigned i = 0; i <= inode->num_ads; i++) {
- struct lookup_table_entry *src_lte, *dest_lte;
- src_lte = inode_stream_lte_unresolved(inode, i,
- src_wim->lookup_table);
-
- if (src_lte && ++src_lte->out_refcnt == 1) {
- dest_lte = inode_stream_lte_unresolved(inode, i,
- dest_wim->lookup_table);
-
- if (!dest_lte) {
- dest_lte = clone_lookup_table_entry(src_lte);
- if (!dest_lte)
- return WIMLIB_ERR_NOMEM;
- list_add_tail(&dest_lte->staging_list, lte_list_head);
- }
- }
- }
- return 0;
-}
-
-/*
- * This function takes in a dentry that was previously located only in image(s)
- * in @src_wim, but now is being added to @dest_wim. For each stream associated
- * with the dentry, if there is already a lookup table entry for that stream in
- * the lookup table of the destination WIM file, its reference count is
- * incrementej. Otherwise, a new lookup table entry is created that points back
- * to the stream in the source WIM file (through the @hash field combined with
- * the @wim field of the lookup table entry.)
- */
-static int add_lte_to_dest_wim(struct dentry *dentry, void *arg)
-{
- WIMStruct *src_wim, *dest_wim;
- struct inode *inode;
-
- src_wim = ((struct wim_pair*)arg)->src_wim;
- dest_wim = ((struct wim_pair*)arg)->dest_wim;
- inode = dentry->d_inode;
-
- wimlib_assert(!inode->resolved);
-
- for (unsigned i = 0; i <= inode->num_ads; i++) {
- struct lookup_table_entry *src_lte, *dest_lte;
- src_lte = inode_stream_lte_unresolved(inode, i,
- src_wim->lookup_table);
-
- if (!src_lte) /* Empty or nonexistent stream. */
- continue;
-
- dest_lte = inode_stream_lte_unresolved(inode, i,
- dest_wim->lookup_table);
- if (dest_lte) {
- dest_lte->refcnt++;
- } else {
- struct list_head *lte_list_head;
- struct list_head *next;
-
- lte_list_head = &((struct wim_pair*)arg)->lte_list_head;
- wimlib_assert(!list_empty(lte_list_head));
-
- next = lte_list_head->next;
- list_del(next);
- dest_lte = container_of(next, struct lookup_table_entry,
- staging_list);
- dest_lte->part_number = 1;
- dest_lte->refcnt = 1;
- wimlib_assert(hashes_equal(dest_lte->hash, src_lte->hash));
-
- lookup_table_insert(dest_wim->lookup_table, dest_lte);
- }
- }
- return 0;
-}
-
-/*
- * Adds an image (given by its dentry tree) to the image metadata array of a WIM
- * file, adds an entry to the lookup table for the image metadata, updates the
- * image count in the header, and selects the new image.
- *
- * Does not update the XML data.
- *
- * On failure, WIMLIB_ERR_NOMEM is returned and no changes are made. Otherwise,
- * 0 is returned and the image metadata array of @w is modified.
- *
- * @w: The WIMStruct for the WIM file.
- * @root_dentry: The root of the directory tree for the image.
- * @sd: The security data for the image.
- */
-static int add_new_dentry_tree(WIMStruct *w, struct dentry *root_dentry,
- struct wim_security_data *sd)
-{
- struct lookup_table_entry *metadata_lte;
- struct image_metadata *imd;
- struct image_metadata *new_imd;
- int ret;
-
- 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 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 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 = true;
-
- FREE(w->image_metadata);
- w->image_metadata = imd;
- w->hdr.image_count++;
-
- /* Change the current image to the new one. There should not be any
- * ways for this to fail, since the image is valid and the dentry tree
- * is already in memory. */
- ret = select_wim_image(w, w->hdr.image_count);
- wimlib_assert(ret == 0);
- return ret;
-err_free_imd:
- FREE(imd);
-err:
- return WIMLIB_ERR_NOMEM;
-
-}
-
-/*
- * Copies an image, or all the images, from a WIM file, into another WIM file.
- */
-WIMLIBAPI int wimlib_export_image(WIMStruct *src_wim,
- int src_image,
- WIMStruct *dest_wim,
- const char *dest_name,
- const char *dest_description,
- int export_flags,
- WIMStruct **additional_swms,
- unsigned num_additional_swms,
- wimlib_progress_func_t progress_func)
-{
- int i;
- int ret;
- struct dentry *root;
- struct wim_pair wims;
- struct wim_security_data *sd;
- struct lookup_table *joined_tab, *src_wim_tab_save;
-
- if (dest_wim->hdr.total_parts != 1) {
- ERROR("Exporting an image to a split WIM is "
- "unsupported");
- return WIMLIB_ERR_SPLIT_UNSUPPORTED;
- }
-
- if (src_image == WIMLIB_ALL_IMAGES) {
- if (src_wim->hdr.image_count > 1) {
-
- /* multi-image export. */
-
- if ((export_flags & WIMLIB_EXPORT_FLAG_BOOT) &&
- (src_wim->hdr.boot_idx == 0))
- {
- /* Specifying the boot flag on a multi-image
- * source WIM makes the boot index default to
- * the bootable image in the source WIM. It is
- * an error if there is no such bootable image.
- * */
- ERROR("Cannot specify `boot' flag when "
- "exporting multiple images from a WIM "
- "with no bootable images");
- return WIMLIB_ERR_INVALID_PARAM;
- }
- if (dest_name || dest_description) {
- ERROR("Image name or image description was "
- "specified, but we are exporting "
- "multiple images");
- return WIMLIB_ERR_INVALID_PARAM;
- }
- for (i = 1; i <= src_wim->hdr.image_count; i++) {
- int new_flags = export_flags;
-
- if (i != src_wim->hdr.boot_idx)
- new_flags &= ~WIMLIB_EXPORT_FLAG_BOOT;
-
- ret = wimlib_export_image(src_wim, i, dest_wim,
- NULL, NULL,
- new_flags,
- additional_swms,
- num_additional_swms,
- progress_func);
- if (ret != 0)
- return ret;
- }
- return 0;
- } else if (src_wim->hdr.image_count == 1) {
- src_image = 1;
- } else {
- return 0;
- }
- }
-
- if (!dest_name) {
- dest_name = wimlib_get_image_name(src_wim, src_image);
- DEBUG("Using name `%s' for source image %d",
- dest_name, src_image);
- }
-
- if (!dest_description) {
- dest_description = wimlib_get_image_description(src_wim,
- src_image);
- DEBUG("Using description `%s' for source image %d",
- dest_description, src_image);
- }
-
- DEBUG("Exporting image %d from `%s'", src_image, src_wim->filename);
-
- if (wimlib_image_name_in_use(dest_wim, dest_name)) {
- ERROR("There is already an image named `%s' in the "
- "destination WIM", dest_name);
- return WIMLIB_ERR_IMAGE_NAME_COLLISION;
- }
-
- ret = verify_swm_set(src_wim, additional_swms, num_additional_swms);
- if (ret != 0)
- return ret;
-
- if (num_additional_swms) {
- ret = new_joined_lookup_table(src_wim, additional_swms,
- num_additional_swms,
- &joined_tab);
- if (ret != 0)
- return ret;
- src_wim_tab_save = src_wim->lookup_table;
- src_wim->lookup_table = joined_tab;
- }
-
- ret = select_wim_image(src_wim, src_image);
- if (ret != 0) {
- ERROR("Could not select image %d from the WIM `%s' "
- "to export it", src_image, src_wim->filename);
- goto out;
- }
-
- /* Pre-allocate the new lookup table entries that will be needed. This
- * way, it's not possible to run out of memory part-way through
- * modifying the lookup table of the destination WIM. */
- wims.src_wim = src_wim;
- wims.dest_wim = dest_wim;
- INIT_LIST_HEAD(&wims.lte_list_head);
- for_lookup_table_entry(src_wim->lookup_table, lte_zero_out_refcnt, NULL);
- root = wim_root_dentry(src_wim);
- for_dentry_in_tree(root, dentry_unresolve_ltes, NULL);
- ret = for_dentry_in_tree(root, allocate_lte_if_needed, &wims);
- if (ret != 0)
- goto out_free_ltes;
-
- ret = xml_export_image(src_wim->wim_info, src_image,
- &dest_wim->wim_info, dest_name, dest_description);
- if (ret != 0)
- goto out_free_ltes;
-
- sd = wim_security_data(src_wim);
- ret = add_new_dentry_tree(dest_wim, root, sd);
- if (ret != 0)
- goto out_xml_delete_image;
-
-
- /* All memory allocations have been taken care of, so it's no longer
- * possible for this function to fail. Go ahead and increment the
- * reference counts of the dentry tree and security data, then update
- * the lookup table of the destination WIM and the boot index, if
- * needed. */
- for_dentry_in_tree(root, increment_dentry_refcnt, NULL);
- sd->refcnt++;
- for_dentry_in_tree(root, add_lte_to_dest_wim, &wims);
- wimlib_assert(list_empty(&wims.lte_list_head));
-
- if (export_flags & WIMLIB_EXPORT_FLAG_BOOT) {
- DEBUG("Setting boot_idx to %d", dest_wim->hdr.image_count);
- wimlib_set_boot_idx(dest_wim, dest_wim->hdr.image_count);
- }
- ret = 0;
- goto out;
-
-out_xml_delete_image:
- xml_delete_image(&dest_wim->wim_info, dest_wim->hdr.image_count);
-out_free_ltes:
- {
- struct lookup_table_entry *lte, *tmp;
- list_for_each_entry_safe(lte, tmp, &wims.lte_list_head, staging_list)
- free_lookup_table_entry(lte);
- }
-
-out:
- if (num_additional_swms) {
- free_lookup_table(src_wim->lookup_table);
- src_wim->lookup_table = src_wim_tab_save;
- }
- return ret;
-}
-
-static int image_run_full_verifications(WIMStruct *w)
-{
- return for_dentry_in_tree(wim_root_dentry(w), verify_dentry, w);
-}
-
-static int lte_fix_refcnt(struct lookup_table_entry *lte, void *ctr)
-{
- if (lte->refcnt != lte->real_refcnt) {
- WARNING("The following lookup table entry has a reference "
- "count of %u, but", lte->refcnt);
- WARNING("We found %u references to it",
- lte->real_refcnt);
- print_lookup_table_entry(lte);
- lte->refcnt = lte->real_refcnt;
- ++*(unsigned long *)ctr;
- }
- return 0;
-}
-
-/* Ideally this would be unnecessary... however, the WIMs for Windows 8 are
- * screwed up because some lookup table entries are referenced more times than
- * their stated reference counts. So theoretically, if we delete all the
- * references to a stream and then remove it, it might still be referenced
- * somewhere else, making a file be missing from the WIM... So, work around this
- * problem by looking at ALL the images to re-calculate the reference count of
- * EVERY lookup table entry. This only absolutely has to be done before an image
- * is deleted or before an image is mounted read-write. */
-int wim_run_full_verifications(WIMStruct *w)
-{
- int ret;
-
- for_lookup_table_entry(w->lookup_table, lte_zero_real_refcnt, NULL);
- w->all_images_verified = true;
- w->full_verification_in_progress = true;
- ret = for_image(w, WIMLIB_ALL_IMAGES, image_run_full_verifications);
- w->full_verification_in_progress = false;
- if (ret == 0) {
- unsigned long num_ltes_with_bogus_refcnt = 0;
- for (int i = 0; i < w->hdr.image_count; i++)
- w->image_metadata[i].metadata_lte->real_refcnt++;
- for_lookup_table_entry(w->lookup_table, lte_fix_refcnt,
- &num_ltes_with_bogus_refcnt);
- if (num_ltes_with_bogus_refcnt != 0) {
- WARNING("A total of %lu entries in the WIM's stream "
- "lookup table had to have\n"
- " their reference counts fixed.",
- num_ltes_with_bogus_refcnt);
- }
- } else {
- w->all_images_verified = false;
- }
- return ret;
-}
-
-/*
- * Deletes an image from the WIM.
- */
-WIMLIBAPI int wimlib_delete_image(WIMStruct *w, int image)
-{
- int i;
- int ret;
-
- if (w->hdr.total_parts != 1) {
- ERROR("Deleting an image from a split WIM is not supported.");
- return WIMLIB_ERR_SPLIT_UNSUPPORTED;
- }
-
- if (image == WIMLIB_ALL_IMAGES) {
- for (i = w->hdr.image_count; i >= 1; i--) {
- ret = wimlib_delete_image(w, i);
- if (ret != 0)
- return ret;
- }
- return 0;
- }
-
- if (!w->all_images_verified) {
- ret = wim_run_full_verifications(w);
- if (ret != 0)
- return ret;
- }
-
- DEBUG("Deleting image %d", image);
-
- /* Even if the dentry tree is not allocated, we must select it (and
- * therefore allocate it) so that we can decrement the reference counts
- * in the lookup table. */
- ret = select_wim_image(w, image);
- if (ret != 0)
- return ret;
-
- /* Free the dentry tree, any lookup table entries that have their
- * refcnt decremented to 0, and the security data. */
- destroy_image_metadata(&w->image_metadata[image - 1], w->lookup_table);
-
- /* Get rid of the empty slot in the image metadata array. */
- memmove(&w->image_metadata[image - 1], &w->image_metadata[image],
- (w->hdr.image_count - image) * sizeof(struct image_metadata));
-
- /* Decrement the image count. */
- if (--w->hdr.image_count == 0) {
- FREE(w->image_metadata);
- w->image_metadata = NULL;
- }
-
- /* Fix the boot index. */
- if (w->hdr.boot_idx == image)
- w->hdr.boot_idx = 0;
- else if (w->hdr.boot_idx > image)
- w->hdr.boot_idx--;
-
- w->current_image = WIMLIB_NO_IMAGE;
-
- /* Remove the image from the XML information. */
- xml_delete_image(&w->wim_info, image);
-
- w->deletion_occurred = true;
- return 0;
-}
-
-enum pattern_type {
- NONE = 0,
- EXCLUSION_LIST,
- EXCLUSION_EXCEPTION,
- COMPRESSION_EXCLUSION_LIST,
- ALIGNMENT_LIST,
-};
-
-/* Default capture configuration file when none is specified. */
-static const char *default_config =
-"[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";
-
-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 char *pattern)
-{
- const char **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(const char *_config_str, size_t config_len,
- const char *_prefix, struct capture_config *config)
-{
- char *config_str;
- char *prefix;
- char *p;
- char *eol;
- char *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;
- }
- prefix = STRDUP(_prefix);
- if (!prefix) {
- FREE(config_str);
- return WIMLIB_ERR_NOMEM;
- }
-
- memcpy(config_str, _config_str, config_len);
- next_p = config_str;
- config->config_str = config_str;
- config->prefix = prefix;
- config->prefix_len = strlen(prefix);
- 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 (char *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 bool match_pattern(const char *path, const char *path_basename,
- const struct pattern_list *list)
-{
- for (size_t i = 0; i < list->num_pats; i++) {
- const char *pat = list->pats[i];
- const char *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;
- }
- 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;
-}
-
-static void print_pattern_list(const struct pattern_list *list)
-{
- for (size_t i = 0; i < list->num_pats; i++)
- printf(" %s\n", list->pats[i]);
-}
-
-static void print_capture_config(const struct capture_config *config)
-{
- if (config->exclusion_list.num_pats) {
- puts("Files or folders excluded from image capture:");
- print_pattern_list(&config->exclusion_list);
- putchar('\n');
- }
-}
-
-/* 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 char *path, const struct capture_config *config,
- bool exclude_prefix)
-{
- const char *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);
-
-}
-
-WIMLIBAPI int wimlib_add_image(WIMStruct *w, const char *source,
- const char *name, const char *config_str,
- size_t config_len, int add_image_flags,
- wimlib_progress_func_t progress_func)
-{
- int (*capture_tree)(struct dentry **, const char *,
- struct lookup_table *,
- struct wim_security_data *,
- const struct capture_config *,
- int, wimlib_progress_func_t, void *);
- void *extra_arg;
-
- struct dentry *root_dentry = NULL;
- struct wim_security_data *sd;
- struct capture_config config;
- struct inode_table inode_tab;
- struct hlist_head inode_list;
- 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;
- }
- 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 {
- capture_tree = build_dentry_tree;
- extra_arg = NULL;
- }
-
- DEBUG("Adding dentry tree from directory or NTFS volume `%s'.", source);
-
- if (!name || !*name) {
- ERROR("Must specify a non-empty string for the image name");
- return WIMLIB_ERR_INVALID_PARAM;
- }
- if (!source) {
- ERROR("Must specify the name of a directory or NTFS volume");
- 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 \"%s\" in `%s'",
- name, w->filename);
- return WIMLIB_ERR_IMAGE_NAME_COLLISION;
- }
-
- DEBUG("Initializing capture configuration");
- if (!config_str) {
- DEBUG("Using default capture configuration");
- config_str = default_config;
- config_len = strlen(default_config);
- }
- ret = init_capture_config(config_str, config_len, source, &config);
- if (ret != 0)
- return ret;
- print_capture_config(&config);
-
- DEBUG("Allocating security data");
-
- sd = CALLOC(1, sizeof(struct wim_security_data));
- if (!sd) {
- ret = WIMLIB_ERR_NOMEM;
- goto out_destroy_config;
- }
- sd->total_length = 8;
- sd->refcnt = 1;
-
- if (progress_func) {
- union wimlib_progress_info progress;
- progress.scan.source = source;
- progress_func(WIMLIB_PROGRESS_MSG_SCAN_BEGIN, &progress);
- }
-
- DEBUG("Building dentry tree.");
- ret = (*capture_tree)(&root_dentry, source, w->lookup_table, sd,
- &config, add_image_flags | WIMLIB_ADD_IMAGE_FLAG_ROOT,
- progress_func, extra_arg);
- destroy_capture_config(&config);
-
- if (ret != 0) {
- ERROR("Failed to build dentry tree for `%s'", source);
- goto out_free_security_data;
- }
-
- if (progress_func) {
- union wimlib_progress_info progress;
- progress.scan.source = source;
- progress_func(WIMLIB_PROGRESS_MSG_SCAN_END, &progress);
- }
-
- DEBUG("Calculating full paths of dentries.");
- ret = for_dentry_in_tree(root_dentry, calculate_dentry_full_path, NULL);
- if (ret != 0)
- goto out_free_dentry_tree;
-
- ret = add_new_dentry_tree(w, root_dentry, sd);
- if (ret != 0)
- goto out_free_dentry_tree;
-
- DEBUG("Inserting dentries into inode table");
- ret = init_inode_table(&inode_tab, 9001);
- if (ret != 0)
- goto out_destroy_imd;
-
- for_dentry_in_tree(root_dentry, inode_table_insert, &inode_tab);
-
- DEBUG("Cleaning up the hard link groups");
- ret = fix_inodes(&inode_tab, &inode_list);
- destroy_inode_table(&inode_tab);
- if (ret != 0)
- goto out_destroy_imd;
-
- DEBUG("Assigning hard link group IDs");
- assign_inode_numbers(&inode_list);
-
- ret = xml_add_image(w, name);
- if (ret != 0)
- goto out_destroy_imd;
-
- if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_BOOT)
- wimlib_set_boot_idx(w, w->hdr.image_count);
- return 0;
-out_destroy_imd:
- destroy_image_metadata(&w->image_metadata[w->hdr.image_count - 1],
- w->lookup_table);
- w->hdr.image_count--;
- return ret;
-out_free_dentry_tree:
- free_dentry_tree(root_dentry, w->lookup_table);
-out_free_security_data:
- free_security_data(sd);
-out_destroy_config:
- destroy_capture_config(&config);
- return ret;
-}
git://wimlib.net / wimlib / blobdiff