+ return ret;
+
+ ctx->attr.Length = sizeof(ctx->attr);
+ ctx->attr.ObjectName = &ctx->target_ntpath;
+
+ status = (*func_NtCreateFile)(&ctx->h_target,
+ FILE_TRAVERSE,
+ &ctx->attr,
+ &ctx->iosb,
+ NULL,
+ 0,
+ FILE_SHARE_VALID_FLAGS,
+ FILE_OPEN_IF,
+ FILE_DIRECTORY_FILE |
+ FILE_OPEN_REPARSE_POINT |
+ FILE_OPEN_FOR_BACKUP_INTENT,
+ NULL,
+ 0);
+
+ if (!NT_SUCCESS(status)) {
+ set_errno_from_nt_status(status);
+ ERROR_WITH_ERRNO("Can't open or create directory \"%ls\" "
+ "(status=0x%08"PRIx32")",
+ ctx->common.target, (u32)status);
+ return WIMLIB_ERR_OPENDIR;
+ }
+
+ path_max = compute_path_max(dentry_list);
+
+ /* Add some extra for building Win32 paths for the file encryption APIs,
+ * and ensure we have at least enough to potentially use a 8.3 name for
+ * the last component. */
+ path_max += max(2 + (ctx->target_ntpath.Length / sizeof(wchar_t)),
+ 8 + 1 + 3);
+
+ ctx->pathbuf.MaximumLength = path_max * sizeof(wchar_t);
+ ctx->pathbuf.Buffer = MALLOC(ctx->pathbuf.MaximumLength);
+ if (!ctx->pathbuf.Buffer)
+ return WIMLIB_ERR_NOMEM;
+
+ ctx->attr.RootDirectory = ctx->h_target;
+ ctx->attr.ObjectName = &ctx->pathbuf;
+
+ ctx->print_buffer = MALLOC((ctx->common.target_nchars + 1 + path_max + 1) *
+ sizeof(wchar_t));
+ if (!ctx->print_buffer)
+ return WIMLIB_ERR_NOMEM;
+
+ return 0;
+}
+
+/* When creating an inode that will have a short (DOS) name, we create it using
+ * the long name associated with the short name. This ensures that the short
+ * name gets associated with the correct long name. */
+static struct wim_dentry *
+first_extraction_alias(const struct wim_inode *inode)
+{
+ struct list_head *next = inode->i_extraction_aliases.next;
+ struct wim_dentry *dentry;
+
+ do {
+ dentry = list_entry(next, struct wim_dentry,
+ d_extraction_alias_node);
+ if (dentry_has_short_name(dentry))
+ break;
+ next = next->next;
+ } while (next != &inode->i_extraction_aliases);
+ return dentry;
+}
+
+/*
+ * Set or clear FILE_ATTRIBUTE_COMPRESSED if the inherited value is different
+ * from the desired value.
+ *
+ * Note that you can NOT override the inherited value of
+ * FILE_ATTRIBUTE_COMPRESSED directly with NtCreateFile().
+ */
+static int
+adjust_compression_attribute(HANDLE h, const struct wim_dentry *dentry,
+ struct win32_apply_ctx *ctx)
+{
+ const bool compressed = (dentry->d_inode->i_attributes &
+ FILE_ATTRIBUTE_COMPRESSED);
+
+ if (ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_NO_ATTRIBUTES)
+ return 0;
+
+ if (!ctx->common.supported_features.compressed_files)
+ return 0;
+
+ FILE_BASIC_INFORMATION info;
+ NTSTATUS status;
+ USHORT compression_state;
+
+ /* Get current attributes */
+ status = (*func_NtQueryInformationFile)(h, &ctx->iosb,
+ &info, sizeof(info),
+ FileBasicInformation);
+ if (NT_SUCCESS(status) &&
+ compressed == !!(info.FileAttributes & FILE_ATTRIBUTE_COMPRESSED))
+ {
+ /* Nothing needs to be done. */
+ return 0;
+ }
+
+ /* Set the new compression state */
+
+ if (compressed)
+ compression_state = COMPRESSION_FORMAT_DEFAULT;
+ else
+ compression_state = COMPRESSION_FORMAT_NONE;
+
+ status = (*func_NtFsControlFile)(h,
+ NULL,
+ NULL,
+ NULL,
+ &ctx->iosb,
+ FSCTL_SET_COMPRESSION,
+ &compression_state,
+ sizeof(USHORT),
+ NULL,
+ 0);
+ if (NT_SUCCESS(status))
+ return 0;
+
+ set_errno_from_nt_status(status);
+ ERROR_WITH_ERRNO("Can't %s compression attribute on \"%ls\" "
+ "(status=0x%08"PRIx32")",
+ (compressed ? "set" : "clear"),
+ current_path(ctx), status);
+ return WIMLIB_ERR_SET_ATTRIBUTES;
+}
+
+/*
+ * Clear FILE_ATTRIBUTE_ENCRYPTED if the file or directory is not supposed to be
+ * encrypted.
+ *
+ * You can provide FILE_ATTRIBUTE_ENCRYPTED to NtCreateFile() to set it on the
+ * created file. However, the file or directory will otherwise default to the
+ * encryption state of the parent directory. This function works around this
+ * limitation by using DecryptFile() to remove FILE_ATTRIBUTE_ENCRYPTED on files
+ * (and directories) that are not supposed to have it set.
+ *
+ * Regardless of whether it succeeds or fails, this function may close the
+ * handle to the file. If it does, it sets it to NULL.
+ */
+static int
+maybe_clear_encryption_attribute(HANDLE *h_ptr, const struct wim_dentry *dentry,
+ struct win32_apply_ctx *ctx)
+{
+ if (dentry->d_inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED)
+ return 0;
+
+ if (ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_NO_ATTRIBUTES)
+ return 0;
+
+ if (!ctx->common.supported_features.encrypted_files)
+ return 0;
+
+ FILE_BASIC_INFORMATION info;
+ NTSTATUS status;
+ BOOL bret;
+
+ /* Get current attributes */
+ status = (*func_NtQueryInformationFile)(*h_ptr, &ctx->iosb,
+ &info, sizeof(info),
+ FileBasicInformation);
+ if (NT_SUCCESS(status) &&
+ !(info.FileAttributes & FILE_ATTRIBUTE_ENCRYPTED))
+ {
+ /* Nothing needs to be done. */
+ return 0;
+ }
+
+ /* Set the new encryption state */
+
+ /* Due to Windows' crappy file encryption APIs, we need to close the
+ * handle to the file so we don't get ERROR_SHARING_VIOLATION. We also
+ * hack together a Win32 path, although we will use the \\?\ prefix so
+ * it will actually be a NT path in disguise... */
+ (*func_NtClose)(*h_ptr);
+ *h_ptr = NULL;
+
+ build_win32_extraction_path(dentry, ctx);
+
+ bret = DecryptFile(ctx->pathbuf.Buffer, 0);
+
+ /* Restore the NT namespace path */
+ build_extraction_path(dentry, ctx);
+
+ if (!bret) {
+ DWORD err = GetLastError();
+ set_errno_from_win32_error(err);
+ ERROR_WITH_ERRNO("Can't decrypt file \"%ls\" (err=%"PRIu32")",
+ current_path(ctx), (u32)err);
+ return WIMLIB_ERR_SET_ATTRIBUTES;
+ }
+ return 0;
+}
+
+/* Try to enable short name support on the target volume. If successful, return
+ * true. If unsuccessful, issue a warning and return false. */
+static bool
+try_to_enable_short_names(const wchar_t *volume)
+{
+ HANDLE h;
+ FILE_FS_PERSISTENT_VOLUME_INFORMATION info;
+ BOOL bret;
+ DWORD bytesReturned;
+
+ h = CreateFile(volume, GENERIC_WRITE,
+ FILE_SHARE_VALID_FLAGS, NULL, OPEN_EXISTING,
+ FILE_FLAG_BACKUP_SEMANTICS, NULL);
+ if (h == INVALID_HANDLE_VALUE)
+ goto fail;
+
+ info.VolumeFlags = 0;
+ info.FlagMask = PERSISTENT_VOLUME_STATE_SHORT_NAME_CREATION_DISABLED;
+ info.Version = 1;
+ info.Reserved = 0;
+
+ bret = DeviceIoControl(h, FSCTL_SET_PERSISTENT_VOLUME_STATE,
+ &info, sizeof(info), NULL, 0,
+ &bytesReturned, NULL);
+
+ CloseHandle(h);
+
+ if (!bret)
+ goto fail;
+ return true;
+
+fail:
+ WARNING("Failed to enable short name support on %ls "
+ "(err=%"PRIu32")", volume + 4, (u32)GetLastError());
+ return false;
+}
+
+static NTSTATUS
+remove_conflicting_short_name(const struct wim_dentry *dentry, struct win32_apply_ctx *ctx)
+{
+ wchar_t *name;
+ wchar_t *end;
+ NTSTATUS status;
+ HANDLE h;
+ size_t bufsize = offsetof(FILE_NAME_INFORMATION, FileName) +
+ (13 * sizeof(wchar_t));
+ u8 buf[bufsize] _aligned_attribute(8);
+ bool retried = false;
+ FILE_NAME_INFORMATION *info = (FILE_NAME_INFORMATION *)buf;
+
+ memset(buf, 0, bufsize);
+
+ /* Build the path with the short name. */
+ name = &ctx->pathbuf.Buffer[ctx->pathbuf.Length / sizeof(wchar_t)];
+ while (name != ctx->pathbuf.Buffer && *(name - 1) != L'\\')
+ name--;
+ end = mempcpy(name, dentry->short_name, dentry->short_name_nbytes);
+ ctx->pathbuf.Length = ((u8 *)end - (u8 *)ctx->pathbuf.Buffer);
+
+ /* Open the conflicting file (by short name). */
+ status = (*func_NtOpenFile)(&h, GENERIC_WRITE | DELETE,
+ &ctx->attr, &ctx->iosb,
+ FILE_SHARE_VALID_FLAGS,
+ FILE_OPEN_REPARSE_POINT | FILE_OPEN_FOR_BACKUP_INTENT);
+ if (!NT_SUCCESS(status)) {
+ WARNING("Can't open \"%ls\" (status=0x%08"PRIx32")",
+ current_path(ctx), (u32)status);
+ goto out;
+ }
+
+#if 0
+ WARNING("Overriding conflicting short name; path=\"%ls\"",
+ current_path(ctx));
+#endif
+
+ /* Try to remove the short name on the conflicting file. */
+
+retry:
+ status = (*func_NtSetInformationFile)(h, &ctx->iosb, info, bufsize,
+ FileShortNameInformation);
+
+ if (status == STATUS_INVALID_PARAMETER && !retried) {
+
+ /* Microsoft forgot to make it possible to remove short names
+ * until Windows 7. Oops. Use a random short name instead. */
+
+ info->FileNameLength = 12 * sizeof(wchar_t);
+ for (int i = 0; i < 8; i++)
+ info->FileName[i] = 'A' + (rand() % 26);
+ info->FileName[8] = L'.';
+ info->FileName[9] = L'W';
+ info->FileName[10] = L'L';
+ info->FileName[11] = L'B';
+ info->FileName[12] = L'\0';
+ retried = true;
+ goto retry;
+ }
+ (*func_NtClose)(h);
+out:
+ build_extraction_path(dentry, ctx);
+ return status;
+}
+
+/* Set the short name on the open file @h which has been created at the location
+ * indicated by @dentry.
+ *
+ * Note that this may add, change, or remove the short name.
+ *
+ * @h must be opened with DELETE access.
+ *
+ * Returns 0 or WIMLIB_ERR_SET_SHORT_NAME. The latter only happens in
+ * STRICT_SHORT_NAMES mode.
+ */
+static int
+set_short_name(HANDLE h, const struct wim_dentry *dentry,
+ struct win32_apply_ctx *ctx)
+{
+
+ if (!ctx->common.supported_features.short_names)
+ return 0;
+
+ /*
+ * Note: The size of the FILE_NAME_INFORMATION buffer must be such that
+ * FileName contains at least 2 wide characters (4 bytes). Otherwise,
+ * NtSetInformationFile() will return STATUS_INFO_LENGTH_MISMATCH. This
+ * is despite the fact that FileNameLength can validly be 0 or 2 bytes,
+ * with the former case being removing the existing short name if
+ * present, rather than setting one.
+ *
+ * The null terminator is seemingly optional, but to be safe we include
+ * space for it and zero all unused space.
+ */
+
+ size_t bufsize = offsetof(FILE_NAME_INFORMATION, FileName) +
+ max(dentry->short_name_nbytes, sizeof(wchar_t)) +
+ sizeof(wchar_t);
+ u8 buf[bufsize] _aligned_attribute(8);
+ FILE_NAME_INFORMATION *info = (FILE_NAME_INFORMATION *)buf;
+ NTSTATUS status;
+ bool tried_to_remove_existing = false;
+
+ memset(buf, 0, bufsize);
+
+ info->FileNameLength = dentry->short_name_nbytes;
+ memcpy(info->FileName, dentry->short_name, dentry->short_name_nbytes);
+
+retry:
+ status = (*func_NtSetInformationFile)(h, &ctx->iosb, info, bufsize,
+ FileShortNameInformation);
+ if (NT_SUCCESS(status))
+ return 0;
+
+ if (status == STATUS_SHORT_NAMES_NOT_ENABLED_ON_VOLUME) {
+ if (dentry->short_name_nbytes == 0)
+ return 0;
+ if (!ctx->tried_to_enable_short_names) {
+ wchar_t volume[7];
+ int ret;
+
+ ctx->tried_to_enable_short_names = true;
+
+ ret = win32_get_drive_path(ctx->common.target,
+ volume);
+ if (ret)
+ return ret;
+ if (try_to_enable_short_names(volume))
+ goto retry;
+ }
+ }
+
+ /*
+ * Short names can conflict in several cases:
+ *
+ * - a file being extracted has a short name conflicting with an
+ * existing file
+ *
+ * - a file being extracted has a short name conflicting with another
+ * file being extracted (possible, but shouldn't happen)
+ *
+ * - a file being extracted has a short name that conflicts with the
+ * automatically generated short name of a file we previously
+ * extracted, but failed to set the short name for. Sounds unlikely,
+ * but this actually does happen fairly often on versions of Windows
+ * prior to Windows 7 because they do not support removing short names
+ * from files.
+ */
+ if (unlikely(status == STATUS_OBJECT_NAME_COLLISION) &&
+ dentry->short_name_nbytes && !tried_to_remove_existing)
+ {
+ tried_to_remove_existing = true;
+ status = remove_conflicting_short_name(dentry, ctx);
+ if (NT_SUCCESS(status))
+ goto retry;
+ }
+
+ /* By default, failure to set short names is not an error (since short
+ * names aren't too important anymore...). */
+ if (!(ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_SHORT_NAMES)) {
+ if (dentry->short_name_nbytes)
+ ctx->num_set_short_name_failures++;
+ else
+ ctx->num_remove_short_name_failures++;
+ return 0;
+ }
+
+ if (status == STATUS_SHORT_NAMES_NOT_ENABLED_ON_VOLUME) {
+ ERROR("Can't set short name when short "
+ "names are not enabled on the volume!");
+ } else {
+ ERROR("Can't set short name on \"%ls\" (status=0x%08"PRIx32")",
+ current_path(ctx), (u32)status);
+ }
+ return WIMLIB_ERR_SET_SHORT_NAME;
+}
+
+/*
+ * A wrapper around NtCreateFile() to make it slightly more usable...
+ * This uses the path currently constructed in ctx->pathbuf.
+ *
+ * Also, we always specify FILE_OPEN_FOR_BACKUP_INTENT and
+ * FILE_OPEN_REPARSE_POINT.
+ */
+static NTSTATUS
+do_create_file(PHANDLE FileHandle,
+ ACCESS_MASK DesiredAccess,
+ PLARGE_INTEGER AllocationSize,
+ ULONG FileAttributes,
+ ULONG CreateDisposition,
+ ULONG CreateOptions,
+ struct win32_apply_ctx *ctx)
+{
+ return (*func_NtCreateFile)(FileHandle,
+ DesiredAccess,
+ &ctx->attr,
+ &ctx->iosb,
+ AllocationSize,
+ FileAttributes,
+ FILE_SHARE_VALID_FLAGS,
+ CreateDisposition,
+ CreateOptions |
+ FILE_OPEN_FOR_BACKUP_INTENT |
+ FILE_OPEN_REPARSE_POINT,
+ NULL,
+ 0);
+}
+
+/* Like do_create_file(), but builds the extraction path of the @dentry first.
+ */
+static NTSTATUS
+create_file(PHANDLE FileHandle,
+ ACCESS_MASK DesiredAccess,
+ PLARGE_INTEGER AllocationSize,
+ ULONG FileAttributes,
+ ULONG CreateDisposition,
+ ULONG CreateOptions,
+ const struct wim_dentry *dentry,
+ struct win32_apply_ctx *ctx)
+{
+ build_extraction_path(dentry, ctx);
+ return do_create_file(FileHandle,
+ DesiredAccess,
+ AllocationSize,
+ FileAttributes,
+ CreateDisposition,
+ CreateOptions,
+ ctx);
+}
+
+/* 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
+create_any_empty_ads(const struct wim_dentry *dentry,
+ struct win32_apply_ctx *ctx)
+{
+ const struct wim_inode *inode = dentry->d_inode;
+ LARGE_INTEGER allocation_size;
+ bool path_modified = false;
+ int ret = 0;
+
+ if (!ctx->common.supported_features.named_data_streams)
+ return 0;
+
+ for (u16 i = 0; i < inode->i_num_ads; i++) {
+ const struct wim_ads_entry *entry;
+ NTSTATUS status;
+ HANDLE h;
+ bool retried;
+ DWORD disposition;
+
+ entry = &inode->i_ads_entries[i];
+
+ /* Not named? */
+ if (!entry->stream_name_nbytes)
+ continue;
+
+ /* Not empty? */
+ if (entry->lte)
+ continue;
+
+ /* Probably setting the allocation size to 0 has no effect, but
+ * we might as well try. */
+ allocation_size.QuadPart = 0;
+
+ build_extraction_path_with_ads(dentry, ctx,
+ entry->stream_name,
+ entry->stream_name_nbytes /
+ sizeof(wchar_t));
+ path_modified = true;
+
+ retried = false;
+ disposition = FILE_SUPERSEDE;
+ retry:
+ status = do_create_file(&h, FILE_WRITE_DATA, &allocation_size,
+ 0, disposition, 0, ctx);
+ if (unlikely(!NT_SUCCESS(status))) {
+ if (status == STATUS_OBJECT_NAME_NOT_FOUND && !retried) {
+ /* Workaround for defect in the Windows PE
+ * in-memory filesystem implementation:
+ * FILE_SUPERSEDE does not create the file, as
+ * expected and documented, when the named file
+ * does not exist. */
+ retried = true;
+ disposition = FILE_CREATE;
+ goto retry;
+ }
+ set_errno_from_nt_status(status);
+ ERROR_WITH_ERRNO("Can't create \"%ls\" "
+ "(status=0x%08"PRIx32")",
+ current_path(ctx), (u32)status);
+ ret = WIMLIB_ERR_OPEN;
+ break;
+ }
+ (*func_NtClose)(h);
+ }
+ /* Restore the path to the dentry itself */
+ if (path_modified)
+ build_extraction_path(dentry, ctx);
+ return ret;
+}
+
+/*
+ * Creates the directory named by @dentry, or uses an existing directory at that
+ * location. If necessary, sets the short name and/or fixes compression and
+ * encryption attributes.
+ *
+ * Returns 0, WIMLIB_ERR_MKDIR, or WIMLIB_ERR_SET_SHORT_NAME.
+ */
+static int
+create_directory(const struct wim_dentry *dentry,
+ struct win32_apply_ctx *ctx)
+{
+ HANDLE h;
+ NTSTATUS status;
+ int ret;
+ ULONG attrib;
+
+ /* Special attributes:
+ *
+ * Use FILE_ATTRIBUTE_ENCRYPTED if the directory needs to have it set.
+ * This doesn't work for FILE_ATTRIBUTE_COMPRESSED (unfortunately).
+ *
+ * Don't specify FILE_ATTRIBUTE_DIRECTORY; it gets set anyway as a
+ * result of the FILE_DIRECTORY_FILE option. */
+ attrib = (dentry->d_inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED);
+
+ /* DELETE is needed for set_short_name().
+ * GENERIC_READ and GENERIC_WRITE are needed for
+ * adjust_compression_attribute(). */
+ status = create_file(&h, GENERIC_READ | GENERIC_WRITE | DELETE, NULL,
+ attrib, FILE_OPEN_IF, FILE_DIRECTORY_FILE,
+ dentry, ctx);
+ if (!NT_SUCCESS(status)) {
+ set_errno_from_nt_status(status);
+ ERROR_WITH_ERRNO("Can't create directory \"%ls\" "
+ "(status=0x%08"PRIx32")",
+ current_path(ctx), (u32)status);
+ return WIMLIB_ERR_MKDIR;
+ }
+
+ ret = set_short_name(h, dentry, ctx);
+
+ if (!ret)
+ ret = adjust_compression_attribute(h, dentry, ctx);
+
+ if (!ret)
+ ret = maybe_clear_encryption_attribute(&h, dentry, ctx);
+ /* May close the handle!!! */
+
+ if (h)
+ (*func_NtClose)(h);
+ return ret;
+}
+
+/*
+ * Create all the directories being extracted, other than the target directory
+ * itself.
+ *
+ * Note: we don't honor directory hard links. However, we don't allow them to
+ * exist in WIM images anyway (see inode_fixup.c).
+ */
+static int
+create_directories(struct list_head *dentry_list,
+ struct win32_apply_ctx *ctx)
+{
+ const struct wim_dentry *dentry;
+ int ret;
+
+ list_for_each_entry(dentry, dentry_list, d_extraction_list_node) {
+
+ if (!(dentry->d_inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY))
+ continue;
+
+ /* Note: Here we include files with
+ * FILE_ATTRIBUTE_DIRECTORY|FILE_ATTRIBUTE_REPARSE_POINT, but we
+ * wait until later to actually set the reparse data. */
+
+ /* If the root dentry is being extracted, it was already done so
+ * in prepare_target(). */
+ if (!dentry_is_root(dentry)) {
+ ret = create_directory(dentry, ctx);
+ ret = check_apply_error(dentry, ctx, ret);
+ if (ret)
+ return ret;
+
+ ret = create_any_empty_ads(dentry, ctx);
+ ret = check_apply_error(dentry, ctx, ret);
+ if (ret)
+ return ret;
+ }
+
+ ret = report_file_created(&ctx->common);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+
+/*
+ * Creates the nondirectory file named by @dentry.
+ *
+ * On success, returns an open handle to the file in @h_ret, with GENERIC_READ,
+ * GENERIC_WRITE, and DELETE access. Also, the path to the file will be saved
+ * in ctx->pathbuf. On failure, returns WIMLIB_ERR_OPEN.
+ */
+static int
+create_nondirectory_inode(HANDLE *h_ret, const struct wim_dentry *dentry,
+ struct win32_apply_ctx *ctx)
+{
+ const struct wim_inode *inode;
+ ULONG attrib;
+ NTSTATUS status;
+ bool retried = false;
+ DWORD disposition;
+
+ inode = dentry->d_inode;
+
+ /* If the file already exists and has FILE_ATTRIBUTE_SYSTEM and/or
+ * FILE_ATTRIBUTE_HIDDEN, these must be specified in order to supersede
+ * the file.
+ *
+ * Normally the user shouldn't be trying to overwrite such files anyway,
+ * but we at least provide FILE_ATTRIBUTE_SYSTEM and
+ * FILE_ATTRIBUTE_HIDDEN if the WIM inode has those attributes so that
+ * we catch the case where the user extracts the same files to the same
+ * location more than one time.
+ *
+ * Also specify FILE_ATTRIBUTE_ENCRYPTED if the file needs to be
+ * encrypted.
+ *
+ * In NO_ATTRIBUTES mode just don't specify any attributes at all.
+ */
+ if (ctx->common.extract_flags & WIMLIB_EXTRACT_FLAG_NO_ATTRIBUTES) {
+ attrib = 0;
+ } else {
+ attrib = (inode->i_attributes & (FILE_ATTRIBUTE_SYSTEM |
+ FILE_ATTRIBUTE_HIDDEN |
+ FILE_ATTRIBUTE_ENCRYPTED));
+ }
+ build_extraction_path(dentry, ctx);
+ disposition = FILE_SUPERSEDE;
+retry:
+ status = do_create_file(h_ret, GENERIC_READ | GENERIC_WRITE | DELETE,
+ NULL, attrib, disposition,
+ FILE_NON_DIRECTORY_FILE, ctx);
+ if (likely(NT_SUCCESS(status))) {
+ int ret;
+
+ ret = adjust_compression_attribute(*h_ret, dentry, ctx);
+ if (ret) {
+ (*func_NtClose)(*h_ret);
+ return ret;
+ }
+
+ ret = maybe_clear_encryption_attribute(h_ret, dentry, ctx);
+ /* May close the handle!!! */
+
+ if (ret) {
+ if (*h_ret)
+ (*func_NtClose)(*h_ret);
+ return ret;
+ }
+
+ if (!*h_ret) {
+ /* Re-open the handle so that we can return it on
+ * success. */
+ status = do_create_file(h_ret,
+ GENERIC_READ |
+ GENERIC_WRITE | DELETE,
+ NULL, 0, FILE_OPEN,
+ FILE_NON_DIRECTORY_FILE, ctx);
+ if (!NT_SUCCESS(status))
+ goto fail;
+ }
+
+ ret = create_any_empty_ads(dentry, ctx);
+ if (ret) {
+ (*func_NtClose)(*h_ret);
+ return ret;
+ }
+ return 0;
+ }
+
+ if (status == STATUS_OBJECT_NAME_NOT_FOUND && !retried) {
+ /* Workaround for defect in the Windows PE in-memory filesystem
+ * implementation: FILE_SUPERSEDE does not create the file, as
+ * expected and documented, when the named file does not exist.
+ */
+ retried = true;
+ disposition = FILE_CREATE;
+ goto retry;
+ }
+
+ if (status == STATUS_ACCESS_DENIED && !retried) {
+ /* We also can't supersede an existing file that has
+ * FILE_ATTRIBUTE_READONLY set; doing so causes NtCreateFile()
+ * to return STATUS_ACCESS_DENIED . The only workaround seems
+ * to be to explicitly remove FILE_ATTRIBUTE_READONLY on the
+ * existing file, then try again. */
+
+ FILE_BASIC_INFORMATION info;
+ HANDLE h;
+
+ status = do_create_file(&h, FILE_WRITE_ATTRIBUTES, NULL, 0,
+ FILE_OPEN, FILE_NON_DIRECTORY_FILE, ctx);
+ if (!NT_SUCCESS(status))
+ goto fail;
+
+ memset(&info, 0, sizeof(info));
+ info.FileAttributes = FILE_ATTRIBUTE_NORMAL;
+
+ status = (*func_NtSetInformationFile)(h, &ctx->iosb,
+ &info, sizeof(info),
+ FileBasicInformation);
+ (*func_NtClose)(h);
+ if (!NT_SUCCESS(status))
+ goto fail;
+ retried = true;
+ goto retry;
+ }
+fail:
+ set_errno_from_nt_status(status);
+ ERROR_WITH_ERRNO("Can't create file \"%ls\" (status=0x%08"PRIx32")",
+ current_path(ctx), (u32)status);
+ return WIMLIB_ERR_OPEN;
+}
+
+/* Creates a hard link at the location named by @dentry to the file represented
+ * by the open handle @h. Or, if the target volume does not support hard links,
+ * create a separate file instead. */
+static int
+create_link(HANDLE h, const struct wim_dentry *dentry,
+ struct win32_apply_ctx *ctx)
+{
+ if (ctx->common.supported_features.hard_links) {
+
+ build_extraction_path(dentry, ctx);
+
+ size_t bufsize = offsetof(FILE_LINK_INFORMATION, FileName) +
+ ctx->pathbuf.Length + sizeof(wchar_t);
+ u8 buf[bufsize] _aligned_attribute(8);
+ FILE_LINK_INFORMATION *info = (FILE_LINK_INFORMATION *)buf;
+ NTSTATUS status;
+
+ info->ReplaceIfExists = TRUE;
+ info->RootDirectory = ctx->attr.RootDirectory;
+ info->FileNameLength = ctx->pathbuf.Length;
+ memcpy(info->FileName, ctx->pathbuf.Buffer, ctx->pathbuf.Length);
+ info->FileName[info->FileNameLength / 2] = L'\0';
+
+ /* Note: the null terminator isn't actually necessary,
+ * but if you don't add the extra character, you get
+ * STATUS_INFO_LENGTH_MISMATCH when FileNameLength
+ * happens to be 2 */
+
+ status = (*func_NtSetInformationFile)(h, &ctx->iosb,
+ info, bufsize,
+ FileLinkInformation);
+ if (NT_SUCCESS(status))
+ return 0;
+ ERROR("Failed to create link \"%ls\" (status=0x%08"PRIx32")",
+ current_path(ctx), (u32)status);
+ return WIMLIB_ERR_LINK;
+ } else {
+ HANDLE h2;
+ int ret;
+
+ ret = create_nondirectory_inode(&h2, dentry, ctx);
+ if (ret)
+ return ret;
+
+ (*func_NtClose)(h2);
+ return 0;
+ }
+}
+
+/* Given an inode (represented by the open handle @h) for which one link has
+ * been created (named by @first_dentry), create the other links.
+ *
+ * Or, if the target volume does not support hard links, create separate files.
+ *
+ * Note: This uses ctx->pathbuf and does not reset it.
+ */
+static int
+create_links(HANDLE h, const struct wim_dentry *first_dentry,
+ struct win32_apply_ctx *ctx)
+{
+ const struct wim_inode *inode;
+ const struct list_head *next;
+ const struct wim_dentry *dentry;
+ int ret;
+
+ inode = first_dentry->d_inode;
+ next = inode->i_extraction_aliases.next;
+ do {
+ dentry = list_entry(next, struct wim_dentry,
+ d_extraction_alias_node);
+ if (dentry != first_dentry) {
+ ret = create_link(h, dentry, ctx);
+ if (ret)
+ return ret;
+ }
+ next = next->next;
+ } while (next != &inode->i_extraction_aliases);
+ return 0;
+}
+
+/* Create a nondirectory file, including all links. */
+static int
+create_nondirectory(struct wim_inode *inode, struct win32_apply_ctx *ctx)
+{
+ struct wim_dentry *first_dentry;
+ HANDLE h;
+ int ret;
+
+ first_dentry = first_extraction_alias(inode);
+
+ /* Create first link. */
+ ret = create_nondirectory_inode(&h, first_dentry, ctx);