/* Create empty named data streams.
*
* Since these won't have 'struct wim_lookup_table_entry's, they won't show up
* in the call to extract_stream_list(). Hence the need for the special case.
*/
static int
ntfs_3g_create_any_empty_ads(ntfs_inode *ni, const struct wim_inode *inode,
const struct ntfs_3g_apply_ctx *ctx)
{
for (u16 i = 0; i < inode->i_num_ads; i++) {
const struct wim_ads_entry *entry;
entry = &inode->i_ads_entries[i];
/* Not named? */
if (!entry->stream_name_nbytes)
continue;
/* Not empty? */
if (entry->lte)
continue;
if (ntfs_attr_add(ni, AT_DATA, entry->stream_name,
entry->stream_name_nbytes /
sizeof(utf16lechar),
NULL, 0))
{
ERROR_WITH_ERRNO("Failed to create named data stream "
"of \"%s\"", dentry_full_path(
inode_first_extraction_dentry(inode)));
return WIMLIB_ERR_NTFS_3G;
}
}
return 0;
}
static int
calculate_chunk_sha1(struct filedes *in_fd, size_t this_chunk_size,
off_t offset, u8 sha1_md[])
{
u8 buf[BUFFER_SIZE];
SHA_CTX ctx;
size_t bytes_remaining;
size_t bytes_to_read;
int ret;
bytes_remaining = this_chunk_size;
sha1_init(&ctx);
do {
bytes_to_read = min(bytes_remaining, sizeof(buf));
ret = full_pread(in_fd, buf, bytes_to_read, offset);
if (ret) {
ERROR_WITH_ERRNO("Read error while calculating "
"integrity checksums");
return ret;
}
sha1_update(&ctx, buf, bytes_to_read);
bytes_remaining -= bytes_to_read;
offset += bytes_to_read;
} while (bytes_remaining);
sha1_final(sha1_md, &ctx);
return 0;
}
/* Recursively creates all the subdirectories of @dir, which has been created as
* the NTFS inode @dir_ni. */
static int
ntfs_3g_create_dirs_recursive(ntfs_inode *dir_ni, struct wim_dentry *dir,
struct ntfs_3g_apply_ctx *ctx)
{
struct wim_dentry *child;
for_dentry_child(child, dir) {
ntfs_inode *ni;
int ret;
if (!(child->d_inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY))
continue;
if (!will_extract_dentry(child))
continue;
ni = ntfs_create(dir_ni, 0, child->d_extraction_name,
child->d_extraction_name_nchars, S_IFDIR);
if (!ni) {
ERROR_WITH_ERRNO("Error creating \"%s\" in NTFS volume",
dentry_full_path(child));
return WIMLIB_ERR_NTFS_3G;
}
child->d_inode->i_mft_no = ni->mft_no;
ret = report_file_created(&ctx->common);
if (!ret)
ret = ntfs_3g_set_metadata(ni, child->d_inode, ctx);
if (!ret)
ret = ntfs_3g_create_any_empty_ads(ni, child->d_inode, ctx);
if (!ret)
ret = ntfs_3g_create_dirs_recursive(ni, child, ctx);
if (ntfs_inode_close_in_dir(ni, dir_ni) && !ret) {
ERROR_WITH_ERRNO("Error closing \"%s\" in NTFS volume",
dentry_full_path(child));
ret = WIMLIB_ERR_NTFS_3G;
}
if (ret)
return ret;
}
/* Restore the DOS name of the @dentry.
* This closes both @ni and @dir_ni.
* If either is NULL, then they are opened temporarily. */
static int
ntfs_3g_restore_dos_name(ntfs_inode *ni, ntfs_inode *dir_ni,
struct wim_dentry *dentry, ntfs_volume *vol)
{
int ret;
const char *dos_name;
size_t dos_name_nbytes;
/* Note: ntfs_set_ntfs_dos_name() closes both inodes (even if it fails).
* And it takes in a multibyte string, even though it translates it to
* UTF-16LE internally... which is annoying because we currently have
* the UTF-16LE string but not the multibyte string. */
ret = utf16le_get_tstr(dentry->short_name, dentry->short_name_nbytes,
&dos_name, &dos_name_nbytes);
if (ret)
goto out_close;
if (!dir_ni)
dir_ni = ntfs_inode_open(vol, dentry->d_parent->d_inode->i_mft_no);
if (!ni)
ni = ntfs_inode_open(vol, dentry->d_inode->i_mft_no);
if (dir_ni && ni) {
ret = ntfs_set_ntfs_dos_name(ni, dir_ni,
dos_name, dos_name_nbytes, 0);
dir_ni = NULL;
ni = NULL;
} else {
ret = -1;
}
utf16le_put_tstr(dos_name);
if (ret) {
ERROR_WITH_ERRNO("Failed to set DOS name of \"%s\" in NTFS "
"volume", dentry_full_path(dentry));
ret = WIMLIB_ERR_SET_SHORT_NAME;
goto out_close;
}
/* Unlike most other NTFS-3g functions, ntfs_set_ntfs_dos_name()
* changes the directory's last modification timestamp...
* Change it back. */
return ntfs_3g_restore_timestamps(vol, dentry->d_parent->d_inode);
out_close:
/* ntfs_inode_close() can take a NULL argument, but it's probably best
* not to rely on this behavior. */
if (ni)
ntfs_inode_close(ni);
if (dir_ni)
ntfs_inode_close(dir_ni);
return ret;
}
static int
open_wim_file(const tchar *filename, struct filedes *fd_ret)
{
int raw_fd;
raw_fd = topen(filename, O_RDONLY | O_BINARY);
if (raw_fd < 0) {
ERROR_WITH_ERRNO("Can't open \"%"TS"\" read-only", filename);
return WIMLIB_ERR_OPEN;
}
filedes_init(fd_ret, raw_fd);
return 0;
}
/*
* can_modify_wim - Check if a given WIM is writeable. This is only the case if
* it meets the following three conditions:
*
* 1. Write access is allowed to the underlying file (if any) at the filesystem level.
* 2. The WIM is not part of a spanned set.
* 3. The WIM_HDR_FLAG_READONLY flag is not set in the WIM header.
*
* Return value is 0 if writable; WIMLIB_ERR_WIM_IS_READONLY otherwise.
*/
int
can_modify_wim(WIMStruct *wim)
{
if (wim->filename) {
if (taccess(wim->filename, W_OK)) {
ERROR_WITH_ERRNO("Can't modify \"%"TS"\"", wim->filename);
return WIMLIB_ERR_WIM_IS_READONLY;
}
}
if (wim->hdr.total_parts != 1) {
ERROR("Cannot modify \"%"TS"\": is part of a split WIM",
wim->filename);
return WIMLIB_ERR_WIM_IS_READONLY;
}
if (wim->hdr.flags & WIM_HDR_FLAG_READONLY) {
ERROR("Cannot modify \"%"TS"\": is marked read-only",
wim->filename);
return WIMLIB_ERR_WIM_IS_READONLY;
}
return 0;
}
static int
execute_rename_command(struct update_command_journal *j,
WIMStruct *wim,
const struct wimlib_update_command *rename_cmd)
{
int ret;
ret = rename_wim_path(wim, rename_cmd->rename.wim_source_path,
rename_cmd->rename.wim_target_path,
WIMLIB_CASE_PLATFORM_DEFAULT, j);
if (ret) {
ret = -ret;
errno = ret;
ERROR_WITH_ERRNO("Can't rename \"%"TS"\" to \"%"TS"\"",
rename_cmd->rename.wim_source_path,
rename_cmd->rename.wim_target_path);
switch (ret) {
case ENOMEM:
ret = WIMLIB_ERR_NOMEM;
break;
case ENOTDIR:
ret = WIMLIB_ERR_NOTDIR;
break;
case ENOTEMPTY:
case EBUSY:
/* XXX: EBUSY is returned when the rename would create a
* loop. It maybe should have its own error code. */
ret = WIMLIB_ERR_NOTEMPTY;
break;
case EISDIR:
ret = WIMLIB_ERR_IS_DIRECTORY;
break;
case ENOENT:
default:
ret = WIMLIB_ERR_PATH_DOES_NOT_EXIST;
break;
}
}
return ret;
}
/* Restore the timestamps on the NTFS inode corresponding to @inode. */
static int
ntfs_3g_restore_timestamps(ntfs_volume *vol, const struct wim_inode *inode)
{
ntfs_inode *ni;
int res;
ni = ntfs_inode_open(vol, inode->i_mft_no);
if (!ni)
goto fail;
res = ntfs_3g_set_timestamps(ni, inode);
if (ntfs_inode_close(ni) || res)
goto fail;
return 0;
fail:
ERROR_WITH_ERRNO("Failed to update timestamps of \"%s\" in NTFS volume",
dentry_full_path(inode_first_extraction_dentry(inode)));
return WIMLIB_ERR_SET_TIMESTAMPS;
}
/*
* Begins the reading of a WIM file; opens the file and reads its header and
* blob table, and optionally checks the integrity.
*/
static int
begin_read(WIMStruct *wim, const void *wim_filename_or_fd, int open_flags)
{
int ret;
int xml_num_images;
const tchar *wimfile;
if (open_flags & WIMLIB_OPEN_FLAG_FROM_PIPE) {
wimfile = NULL;
filedes_init(&wim->in_fd, *(const int*)wim_filename_or_fd);
wim->in_fd.is_pipe = 1;
} else {
wimfile = wim_filename_or_fd;
ret = open_wim_file(wimfile, &wim->in_fd);
if (ret)
return ret;
/* The absolute path to the WIM is requested so that
* wimlib_overwrite() still works even if the process changes
* its working directory. This actually happens if a WIM is
* mounted read-write, since the FUSE thread changes directory
* to "/", and it needs to be able to find the WIM file again.
*
* This will break if the full path to the WIM changes in the
* intervening time...
*
* Warning: in Windows native builds, realpath() calls the
* replacement function in win32_replacements.c.
*/
wim->filename = realpath(wimfile, NULL);
if (!wim->filename) {
ERROR_WITH_ERRNO("Failed to get full path to file "
"\"%"TS"\"", wimfile);
if (errno == ENOMEM)
return WIMLIB_ERR_NOMEM;
else
return WIMLIB_ERR_NO_FILENAME;
}
}
ret = read_wim_header(wim, &wim->hdr);
if (ret)
return ret;
if (wim->hdr.flags & WIM_HDR_FLAG_WRITE_IN_PROGRESS) {
WARNING("The WIM_HDR_FLAG_WRITE_IN_PROGRESS flag is set in the header of\n"
" \"%"TS"\". It may be being changed by another process,\n"
" or a process may have crashed while writing the WIM.",
wimfile);
}
if (open_flags & WIMLIB_OPEN_FLAG_WRITE_ACCESS) {
ret = can_modify_wim(wim);
if (ret)
return ret;
}
if ((open_flags & WIMLIB_OPEN_FLAG_ERROR_IF_SPLIT) &&
(wim->hdr.total_parts != 1))
return WIMLIB_ERR_IS_SPLIT_WIM;
/* If the boot index is invalid, print a warning and set it to 0 */
if (wim->hdr.boot_idx > wim->hdr.image_count) {
WARNING("Ignoring invalid boot index.");
wim->hdr.boot_idx = 0;
}
/* Check and cache the compression type */
if (wim->hdr.flags & WIM_HDR_FLAG_COMPRESSION) {
if (wim->hdr.flags & WIM_HDR_FLAG_COMPRESS_LZX) {
wim->compression_type = WIMLIB_COMPRESSION_TYPE_LZX;
} else if (wim->hdr.flags & (WIM_HDR_FLAG_COMPRESS_XPRESS |
WIM_HDR_FLAG_COMPRESS_XPRESS_2)) {
wim->compression_type = WIMLIB_COMPRESSION_TYPE_XPRESS;
} else if (wim->hdr.flags & WIM_HDR_FLAG_COMPRESS_LZMS) {
wim->compression_type = WIMLIB_COMPRESSION_TYPE_LZMS;
} else {
return WIMLIB_ERR_INVALID_COMPRESSION_TYPE;
}
} else {
wim->compression_type = WIMLIB_COMPRESSION_TYPE_NONE;
}
wim->out_compression_type = wim->compression_type;
/* Check and cache the chunk size. */
wim->chunk_size = wim->hdr.chunk_size;
wim->out_chunk_size = wim->chunk_size;
if (!wim_chunk_size_valid(wim->chunk_size, wim->compression_type)) {
ERROR("Invalid chunk size (%"PRIu32" bytes) "
"for compression type %"TS"!", wim->chunk_size,
wimlib_get_compression_type_string(wim->compression_type));
return WIMLIB_ERR_INVALID_CHUNK_SIZE;
}
if (open_flags & WIMLIB_OPEN_FLAG_CHECK_INTEGRITY) {
ret = check_wim_integrity(wim);
if (ret == WIM_INTEGRITY_NONEXISTENT) {
WARNING("\"%"TS"\" does not contain integrity "
"information. Skipping integrity check.",
wimfile);
} else if (ret == WIM_INTEGRITY_NOT_OK) {
return WIMLIB_ERR_INTEGRITY;
} else if (ret != WIM_INTEGRITY_OK) {
return ret;
}
}
if (wim->hdr.image_count != 0 && wim->hdr.part_number == 1) {
wim->image_metadata = new_image_metadata_array(wim->hdr.image_count);
if (!wim->image_metadata)
return WIMLIB_ERR_NOMEM;
}
if (open_flags & WIMLIB_OPEN_FLAG_FROM_PIPE) {
wim->blob_table = new_blob_table(9001);
if (!wim->blob_table)
return WIMLIB_ERR_NOMEM;
} else {
ret = read_wim_xml_data(wim);
if (ret)
return ret;
xml_num_images = wim_info_get_num_images(wim->wim_info);
if (xml_num_images != wim->hdr.image_count) {
ERROR("The WIM's header is inconsistent with its XML data.\n"
" Please submit a bug report if you believe this "
"WIM file should be considered valid.");
return WIMLIB_ERR_IMAGE_COUNT;
}
ret = read_blob_table(wim);
if (ret)
return ret;
}
return 0;
}
/* Set attributes, security descriptor, and timestamps on the NTFS inode @ni.
*/
static int
ntfs_3g_set_metadata(ntfs_inode *ni, const struct wim_inode *inode,
const struct ntfs_3g_apply_ctx *ctx)
{
int extract_flags;
const struct wim_security_data *sd;
struct wim_dentry *one_dentry;
int ret;
extract_flags = ctx->common.extract_flags;
sd = wim_get_current_security_data(ctx->common.wim);
one_dentry = inode_first_extraction_dentry(inode);
/* Attributes */
if (!(extract_flags & WIMLIB_EXTRACT_FLAG_NO_ATTRIBUTES)) {
u32 attrib = inode->i_attributes;
attrib &= ~(FILE_ATTRIBUTE_SPARSE_FILE |
FILE_ATTRIBUTE_ENCRYPTED);
if (ntfs_set_ntfs_attrib(ni, (const char *)&attrib,
sizeof(attrib), 0))
{
ERROR_WITH_ERRNO("Failed to set attributes on \"%s\" "
"in NTFS volume",
dentry_full_path(one_dentry));
return WIMLIB_ERR_SET_ATTRIBUTES;
}
}
/* Security descriptor */
if ((inode->i_security_id >= 0)
&& !(extract_flags & WIMLIB_EXTRACT_FLAG_NO_ACLS))
{
const void *desc;
size_t desc_size;
desc = sd->descriptors[inode->i_security_id];
desc_size = sd->sizes[inode->i_security_id];
ret = ntfs_3g_set_security_descriptor(ni, desc, desc_size);
if (ret) {
if (wimlib_print_errors) {
ERROR_WITH_ERRNO("Failed to set security descriptor "
"on \"%s\" in NTFS volume",
dentry_full_path(one_dentry));
fprintf(wimlib_error_file,
"The security descriptor is: ");
print_byte_field(desc, desc_size, wimlib_error_file);
fprintf(wimlib_error_file, "\n");
}
return ret;
}
}
/* Timestamps */
ret = ntfs_3g_set_timestamps(ni, inode);
if (ret) {
ERROR_WITH_ERRNO("Failed to set timestamps on \"%s\" "
"in NTFS volume",
dentry_full_path(one_dentry));
return ret;
}
return 0;
}
