4 * All the library code specific to native Windows builds is in here.
8 * Copyright (C) 2013 Eric Biggers
10 * This file is part of wimlib, a library for working with WIM files.
12 * wimlib is free software; you can redistribute it and/or modify it under the
13 * terms of the GNU General Public License as published by the Free
14 * Software Foundation; either version 3 of the License, or (at your option)
17 * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
18 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
19 * A PARTICULAR PURPOSE. See the GNU General Public License for more
22 * You should have received a copy of the GNU General Public License
23 * along with wimlib; if not, see http://www.gnu.org/licenses/.
32 #include <shlwapi.h> /* shlwapi.h for PathMatchSpecW() */
33 #ifdef ERROR /* windows.h defines this */
39 #include "lookup_table.h"
41 #include "endianness.h"
42 #include "buffer_io.h"
47 #define MAX_GET_SD_ACCESS_DENIED_WARNINGS 1
48 #define MAX_GET_SACL_PRIV_NOTHELD_WARNINGS 1
49 #define MAX_CREATE_HARD_LINK_WARNINGS 5
50 struct win32_capture_state {
51 unsigned long num_get_sd_access_denied;
52 unsigned long num_get_sacl_priv_notheld;
55 #define MAX_SET_SD_ACCESS_DENIED_WARNINGS 1
56 #define MAX_SET_SACL_PRIV_NOTHELD_WARNINGS 1
58 #ifdef ENABLE_ERROR_MESSAGES
60 win32_error(u32 err_code)
64 nchars = FormatMessageW(FORMAT_MESSAGE_FROM_SYSTEM |
65 FORMAT_MESSAGE_ALLOCATE_BUFFER,
67 (wchar_t*)&buffer, 0, NULL);
69 ERROR("Error printing error message! "
70 "Computer will self-destruct in 3 seconds.");
72 ERROR("Win32 error: %ls", buffer);
76 #else /* ENABLE_ERROR_MESSAGES */
77 # define win32_error(err_code)
78 #endif /* !ENABLE_ERROR_MESSAGES */
80 /* Pointers to functions that are not available on all targetted versions of
81 * Windows (XP and later). NOTE: The WINAPI annotations seem to be important; I
82 * assume it specifies a certain calling convention. */
85 static HANDLE (WINAPI *win32func_FindFirstStreamW)(LPCWSTR lpFileName,
86 STREAM_INFO_LEVELS InfoLevel,
87 LPVOID lpFindStreamData,
88 DWORD dwFlags) = NULL;
91 static BOOL (WINAPI *win32func_FindNextStreamW)(HANDLE hFindStream,
92 LPVOID lpFindStreamData) = NULL;
94 static HMODULE hKernel32 = NULL;
96 /* Try to dynamically load some functions */
102 if (hKernel32 == NULL) {
103 DEBUG("Loading Kernel32.dll");
104 hKernel32 = LoadLibraryW(L"Kernel32.dll");
105 if (hKernel32 == NULL) {
106 err = GetLastError();
107 WARNING("Can't load Kernel32.dll");
113 DEBUG("Looking for FindFirstStreamW");
114 win32func_FindFirstStreamW = (void*)GetProcAddress(hKernel32, "FindFirstStreamW");
115 if (!win32func_FindFirstStreamW) {
116 WARNING("Could not find function FindFirstStreamW() in Kernel32.dll!");
117 WARNING("Capturing alternate data streams will not be supported.");
121 DEBUG("Looking for FindNextStreamW");
122 win32func_FindNextStreamW = (void*)GetProcAddress(hKernel32, "FindNextStreamW");
123 if (!win32func_FindNextStreamW) {
124 WARNING("Could not find function FindNextStreamW() in Kernel32.dll!");
125 WARNING("Capturing alternate data streams will not be supported.");
126 win32func_FindFirstStreamW = NULL;
131 win32_global_cleanup()
133 if (hKernel32 != NULL) {
134 DEBUG("Closing Kernel32.dll");
135 FreeLibrary(hKernel32);
140 static const wchar_t *capture_access_denied_msg =
141 L" If you are not running this program as the administrator, you may\n"
142 " need to do so, so that all data and metadata can be backed up.\n"
143 " Otherwise, there may be no way to access the desired data or\n"
144 " metadata without taking ownership of the file or directory.\n"
147 static const wchar_t *apply_access_denied_msg =
148 L"If you are not running this program as the administrator, you may\n"
149 " need to do so, so that all data and metadata can be extracted\n"
150 " exactly as the origignal copy. However, if you do not care that\n"
151 " the security descriptors are extracted correctly, you could run\n"
152 " `wimlib-imagex apply' with the --no-acls flag instead.\n"
156 win32_open_existing_file(const wchar_t *path, DWORD dwDesiredAccess)
158 return CreateFileW(path,
161 NULL, /* lpSecurityAttributes */
163 FILE_FLAG_BACKUP_SEMANTICS |
164 FILE_FLAG_OPEN_REPARSE_POINT,
165 NULL /* hTemplateFile */);
169 win32_open_file_data_only(const wchar_t *path)
171 return win32_open_existing_file(path, FILE_READ_DATA);
175 read_win32_file_prefix(const struct wim_lookup_table_entry *lte,
177 consume_data_callback_t cb,
186 HANDLE hFile = win32_open_file_data_only(lte->file_on_disk);
187 if (hFile == INVALID_HANDLE_VALUE) {
188 err = GetLastError();
189 ERROR("Failed to open \"%ls\"", lte->file_on_disk);
191 return WIMLIB_ERR_OPEN;
195 out_buf = alloca(WIM_CHUNK_SIZE);
197 out_buf = ctx_or_buf;
199 bytes_remaining = size;
200 while (bytes_remaining) {
201 DWORD bytesToRead, bytesRead;
203 bytesToRead = min(WIM_CHUNK_SIZE, bytes_remaining);
204 if (!ReadFile(hFile, out_buf, bytesToRead, &bytesRead, NULL) ||
205 bytesRead != bytesToRead)
207 err = GetLastError();
208 ERROR("Failed to read data from \"%ls\"", lte->file_on_disk);
210 ret = WIMLIB_ERR_READ;
213 bytes_remaining -= bytesRead;
215 ret = (*cb)(out_buf, bytesRead, ctx_or_buf);
219 out_buf += bytesRead;
226 struct win32_encrypted_read_ctx {
227 consume_data_callback_t read_prefix_cb;
228 void *read_prefix_ctx_or_buf;
236 win32_encrypted_export_cb(unsigned char *_data, void *_ctx, unsigned long len)
238 const void *data = _data;
239 struct win32_encrypted_read_ctx *ctx = _ctx;
242 DEBUG("len = %lu", len);
243 if (ctx->read_prefix_cb) {
244 /* The length of the buffer passed to the ReadEncryptedFileRaw()
245 * export callback is undocumented, so we assume it may be of
247 size_t bytes_to_buffer = min(ctx->bytes_remaining - ctx->buf_filled,
249 while (bytes_to_buffer) {
250 size_t bytes_to_copy_to_buf =
251 min(bytes_to_buffer, WIM_CHUNK_SIZE - ctx->buf_filled);
253 memcpy(ctx->buf + ctx->buf_filled, data,
254 bytes_to_copy_to_buf);
255 ctx->buf_filled += bytes_to_copy_to_buf;
256 data += bytes_to_copy_to_buf;
257 bytes_to_buffer -= bytes_to_copy_to_buf;
259 if (ctx->buf_filled == WIM_CHUNK_SIZE ||
260 ctx->buf_filled == ctx->bytes_remaining)
262 ret = (*ctx->read_prefix_cb)(ctx->buf,
264 ctx->read_prefix_ctx_or_buf);
266 ctx->wimlib_err_code = ret;
267 /* Shouldn't matter what error code is returned
268 * here, as long as it isn't ERROR_SUCCESS. */
269 return ERROR_READ_FAULT;
271 ctx->bytes_remaining -= ctx->buf_filled;
276 size_t len_to_copy = min(len, ctx->bytes_remaining);
277 memcpy(ctx->read_prefix_ctx_or_buf, data, len_to_copy);
278 ctx->bytes_remaining -= len_to_copy;
279 ctx->read_prefix_ctx_or_buf += len_to_copy;
281 return ERROR_SUCCESS;
285 read_win32_encrypted_file_prefix(const struct wim_lookup_table_entry *lte,
287 consume_data_callback_t cb,
291 struct win32_encrypted_read_ctx export_ctx;
296 DEBUG("Reading %"PRIu64" bytes from encryted file \"%ls\"",
297 size, lte->file_on_disk);
299 export_ctx.read_prefix_cb = cb;
300 export_ctx.read_prefix_ctx_or_buf = ctx_or_buf;
301 export_ctx.wimlib_err_code = 0;
303 export_ctx.buf = MALLOC(WIM_CHUNK_SIZE);
305 return WIMLIB_ERR_NOMEM;
307 export_ctx.buf = NULL;
309 export_ctx.bytes_remaining = size;
311 err = OpenEncryptedFileRawW(lte->file_on_disk, 0, &file_ctx);
312 if (err != ERROR_SUCCESS) {
313 ERROR("Failed to open encrypted file \"%ls\" for raw read",
316 ret = WIMLIB_ERR_OPEN;
319 err = ReadEncryptedFileRaw(win32_encrypted_export_cb,
320 &export_ctx, file_ctx);
321 if (err != ERROR_SUCCESS) {
322 ERROR("Failed to read encrypted file \"%ls\"",
325 ret = export_ctx.wimlib_err_code;
327 ret = WIMLIB_ERR_READ;
328 } else if (export_ctx.bytes_remaining != 0) {
329 ERROR("Only could read %"PRIu64" of %"PRIu64" bytes from "
330 "encryted file \"%ls\"",
331 size - export_ctx.bytes_remaining, size,
333 ret = WIMLIB_ERR_READ;
337 CloseEncryptedFileRaw(file_ctx);
339 FREE(export_ctx.buf);
343 /* Given a path, which may not yet exist, get a set of flags that describe the
344 * features of the volume the path is on. */
346 win32_get_vol_flags(const wchar_t *path, unsigned *vol_flags_ret)
352 if (path[0] != L'\0' && path[0] != L'\\' &&
353 path[0] != L'/' && path[1] == L':')
355 /* Path starts with a drive letter; use it. */
356 volume = alloca(4 * sizeof(wchar_t));
362 /* Path does not start with a drive letter; use the volume of
363 * the current working directory. */
366 bret = GetVolumeInformationW(volume, /* lpRootPathName */
367 NULL, /* lpVolumeNameBuffer */
368 0, /* nVolumeNameSize */
369 NULL, /* lpVolumeSerialNumber */
370 NULL, /* lpMaximumComponentLength */
371 &vol_flags, /* lpFileSystemFlags */
372 NULL, /* lpFileSystemNameBuffer */
373 0); /* nFileSystemNameSize */
375 DWORD err = GetLastError();
376 WARNING("Failed to get volume information for path \"%ls\"", path);
378 vol_flags = 0xffffffff;
381 DEBUG("using vol_flags = %x", vol_flags);
382 *vol_flags_ret = vol_flags;
388 FILETIME_to_u64(const FILETIME *ft)
390 return ((u64)ft->dwHighDateTime << 32) | (u64)ft->dwLowDateTime;
394 win32_get_short_name(struct wim_dentry *dentry, const wchar_t *path)
396 WIN32_FIND_DATAW dat;
397 if (FindFirstFileW(path, &dat) && dat.cAlternateFileName[0] != L'\0') {
398 DEBUG("\"%ls\": short name \"%ls\"", path, dat.cAlternateFileName);
399 size_t short_name_nbytes = wcslen(dat.cAlternateFileName) *
401 size_t n = short_name_nbytes + sizeof(wchar_t);
402 dentry->short_name = MALLOC(n);
403 if (!dentry->short_name)
404 return WIMLIB_ERR_NOMEM;
405 memcpy(dentry->short_name, dat.cAlternateFileName, n);
406 dentry->short_name_nbytes = short_name_nbytes;
408 /* If we can't read the short filename for some reason, we just ignore
409 * the error and assume the file has no short name. I don't think this
410 * should be an issue, since the short names are essentially obsolete
416 win32_get_security_descriptor(struct wim_dentry *dentry,
417 struct sd_set *sd_set,
419 struct win32_capture_state *state,
422 SECURITY_INFORMATION requestedInformation;
428 requestedInformation = DACL_SECURITY_INFORMATION |
429 SACL_SECURITY_INFORMATION |
430 OWNER_SECURITY_INFORMATION |
431 GROUP_SECURITY_INFORMATION;
433 /* Request length of security descriptor */
434 status = GetFileSecurityW(path, requestedInformation,
435 NULL, 0, &lenNeeded);
436 err = GetLastError();
437 if (!status && err == ERROR_INSUFFICIENT_BUFFER) {
438 DWORD len = lenNeeded;
440 if (GetFileSecurityW(path, requestedInformation,
441 (PSECURITY_DESCRIPTOR)buf, len, &lenNeeded))
443 int security_id = sd_set_add_sd(sd_set, buf, len);
445 return WIMLIB_ERR_NOMEM;
447 dentry->d_inode->i_security_id = security_id;
451 err = GetLastError();
455 if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_STRICT_ACLS)
459 case ERROR_PRIVILEGE_NOT_HELD:
460 if (requestedInformation & SACL_SECURITY_INFORMATION) {
461 n = state->num_get_sacl_priv_notheld++;
462 requestedInformation &= ~SACL_SECURITY_INFORMATION;
463 if (n < MAX_GET_SACL_PRIV_NOTHELD_WARNINGS) {
465 "We don't have enough privileges to read the full security\n"
466 " descriptor of \"%ls\"!\n"
467 " Re-trying with SACL omitted.\n", path);
468 } else if (n == MAX_GET_SACL_PRIV_NOTHELD_WARNINGS) {
470 "Suppressing further privileges not held error messages when reading\n"
471 " security descriptors.");
476 case ERROR_ACCESS_DENIED:
477 n = state->num_get_sd_access_denied++;
478 if (n < MAX_GET_SD_ACCESS_DENIED_WARNINGS) {
479 WARNING("Failed to read security descriptor of \"%ls\": "
480 "Access denied!\n%ls", path, capture_access_denied_msg);
481 } else if (n == MAX_GET_SD_ACCESS_DENIED_WARNINGS) {
482 WARNING("Suppressing further access denied errors messages i"
483 "when reading security descriptors");
488 ERROR("Failed to read security descriptor of \"%ls\"", path);
490 return WIMLIB_ERR_READ;
495 win32_build_dentry_tree_recursive(struct wim_dentry **root_ret,
497 size_t path_num_chars,
498 struct add_image_params *params,
499 struct win32_capture_state *state,
502 /* Reads the directory entries of directory using a Win32 API and recursively
503 * calls win32_build_dentry_tree() on them. */
505 win32_recurse_directory(struct wim_dentry *root,
507 size_t dir_path_num_chars,
508 struct add_image_params *params,
509 struct win32_capture_state *state,
512 WIN32_FIND_DATAW dat;
517 DEBUG("Recurse to directory \"%ls\"", dir_path);
519 /* Begin reading the directory by calling FindFirstFileW. Unlike UNIX
520 * opendir(), FindFirstFileW has file globbing built into it. But this
521 * isn't what we actually want, so just add a dummy glob to get all
523 dir_path[dir_path_num_chars] = L'/';
524 dir_path[dir_path_num_chars + 1] = L'*';
525 dir_path[dir_path_num_chars + 2] = L'\0';
526 hFind = FindFirstFileW(dir_path, &dat);
527 dir_path[dir_path_num_chars] = L'\0';
529 if (hFind == INVALID_HANDLE_VALUE) {
530 err = GetLastError();
531 if (err == ERROR_FILE_NOT_FOUND) {
534 ERROR("Failed to read directory \"%ls\"", dir_path);
536 return WIMLIB_ERR_READ;
541 /* Skip . and .. entries */
542 if (dat.cFileName[0] == L'.' &&
543 (dat.cFileName[1] == L'\0' ||
544 (dat.cFileName[1] == L'.' &&
545 dat.cFileName[2] == L'\0')))
547 size_t filename_len = wcslen(dat.cFileName);
549 dir_path[dir_path_num_chars] = L'/';
550 wmemcpy(dir_path + dir_path_num_chars + 1,
554 struct wim_dentry *child;
555 size_t path_len = dir_path_num_chars + 1 + filename_len;
556 ret = win32_build_dentry_tree_recursive(&child,
562 dir_path[dir_path_num_chars] = L'\0';
566 dentry_add_child(root, child);
567 } while (FindNextFileW(hFind, &dat));
568 err = GetLastError();
569 if (err != ERROR_NO_MORE_FILES) {
570 ERROR("Failed to read directory \"%ls\"", dir_path);
573 ret = WIMLIB_ERR_READ;
581 win32_get_file_and_vol_ids(const wchar_t *path, u64 *ino_ret, u64 *dev_ret)
585 BY_HANDLE_FILE_INFORMATION file_info;
588 hFile = win32_open_existing_file(path, FILE_READ_ATTRIBUTES);
589 if (hFile == INVALID_HANDLE_VALUE) {
590 err = GetLastError();
591 WARNING("Failed to open \"%ls\" to get file and volume IDs",
594 return WIMLIB_ERR_OPEN;
597 if (!GetFileInformationByHandle(hFile, &file_info)) {
598 err = GetLastError();
599 ERROR("Failed to get file information for \"%ls\"", path);
601 ret = WIMLIB_ERR_STAT;
603 *ino_ret = ((u64)file_info.nFileIndexHigh << 32) |
604 (u64)file_info.nFileIndexLow;
605 *dev_ret = file_info.dwVolumeSerialNumber;
615 RP_FIXED_FULLPATH = 0x2,
616 RP_FIXED_ABSPATH = 0x4,
617 RP_FIXED = RP_FIXED_FULLPATH | RP_FIXED_ABSPATH,
620 static enum rp_status
621 win32_maybe_rpfix_target(wchar_t *target, size_t *target_nchars_p,
622 u64 capture_root_ino, u64 capture_root_dev)
624 size_t target_nchars= *target_nchars_p;
625 size_t stripped_chars;
626 wchar_t *orig_target;
628 if (target_nchars == 0)
631 if (target[0] == L'\\') {
632 if (target_nchars >= 2 && target[1] == L'\\') {
633 /* Probaby a volume. Can't do anything with it. */
634 DEBUG("Not fixing target (probably a volume)");
636 } else if (target_nchars >= 7 &&
644 DEBUG("Full style path");
645 /* Full \??\x:\ style path (may be junction or symlink)
649 DEBUG("Absolute target without drive letter");
650 /* Absolute target, without drive letter */
653 } else if (target_nchars >= 3 &&
654 target[0] != L'\0' &&
658 DEBUG("Absolute target with drive letter");
659 /* Absolute target, with drive letter */
662 DEBUG("Relative symlink or other link");
663 /* Relative symlink or other unexpected format */
666 target[target_nchars] = L'\0';
667 orig_target = target;
668 target = fixup_symlink(target + stripped_chars, capture_root_ino, capture_root_dev);
670 target_nchars = wcslen(target);
671 wmemmove(orig_target + stripped_chars, target, target_nchars + 1);
672 *target_nchars_p = target_nchars + stripped_chars;
673 DEBUG("Fixed reparse point (new target: \"%ls\")", orig_target);
674 return stripped_chars ? RP_FIXED_FULLPATH : RP_FIXED_ABSPATH;
680 static enum rp_status
681 win32_do_capture_rpfix(char *rpbuf, DWORD *rpbuflen_p,
682 u64 capture_root_ino, u64 capture_root_dev)
686 u16 substitute_name_offset;
687 u16 substitute_name_len;
689 size_t target_nchars;
690 enum rp_status status;
692 DWORD rpbuflen = *rpbuflen_p;
696 p_get = get_u32(rpbuf, &rptag);
698 p_get = get_u16(p_get, &substitute_name_offset);
699 p_get = get_u16(p_get, &substitute_name_len);
701 if ((size_t)substitute_name_offset + substitute_name_len > rpbuflen)
703 if (rptag == WIM_IO_REPARSE_TAG_SYMLINK) {
710 target = (wchar_t*)&p_get[substitute_name_offset];
711 target_nchars = substitute_name_len / 2;
712 /* Note: target is not necessarily null-terminated */
714 status = win32_maybe_rpfix_target(target, &target_nchars,
715 capture_root_ino, capture_root_dev);
716 if (status & RP_FIXED) {
717 size_t target_nbytes = target_nchars * 2;
718 size_t print_nbytes = target_nbytes;
719 wchar_t target_copy[target_nchars];
720 wchar_t *print_name = target_copy;
722 if (status == RP_FIXED_FULLPATH) {
726 wmemcpy(target_copy, target, target_nchars);
728 p_put = put_u16(p_put, 0); /* Substitute name offset */
729 p_put = put_u16(p_put, target_nbytes); /* Substitute name length */
730 p_put = put_u16(p_put, target_nbytes + 2); /* Print name offset */
731 p_put = put_u16(p_put, print_nbytes); /* Print name length */
732 if (rptag == WIM_IO_REPARSE_TAG_SYMLINK)
733 p_put = put_u32(p_put, 1);
734 p_put = put_bytes(p_put, target_nbytes, target_copy);
735 p_put = put_u16(p_put, 0);
736 p_put = put_bytes(p_put, print_nbytes, print_name);
737 p_put = put_u16(p_put, 0);
738 rpbuflen = p_put - rpbuf;
739 put_u16(rpbuf + 4, rpbuflen - 8);
740 *rpbuflen_p = rpbuflen;
745 /* Load a reparse point into a WIM inode. It is just stored in memory.
747 * @hFile is the open handle to a reparse point, with permission to read the
750 * @inode is the WIM inode for the reparse point.
753 win32_capture_reparse_point(struct wim_dentry **root_p,
755 struct wim_inode *inode,
757 struct add_image_params *params)
759 DEBUG("Capturing reparse point \"%ls\"", path);
761 /* "Reparse point data, including the tag and optional GUID,
762 * cannot exceed 16 kilobytes." - MSDN */
763 char reparse_point_buf[REPARSE_POINT_MAX_SIZE];
768 if (!DeviceIoControl(hFile, FSCTL_GET_REPARSE_POINT,
769 NULL, /* "Not used with this operation; set to NULL" */
770 0, /* "Not used with this operation; set to 0" */
771 reparse_point_buf, /* "A pointer to a buffer that
772 receives the reparse point data */
773 sizeof(reparse_point_buf), /* "The size of the output
778 DWORD err = GetLastError();
779 ERROR("Failed to get reparse data of \"%ls\"", path);
781 return WIMLIB_ERR_READ;
783 if (bytesReturned < 8) {
784 ERROR("Reparse data on \"%ls\" is invalid", path);
785 return WIMLIB_ERR_READ;
787 inode->i_reparse_tag = le32_to_cpu(*(u32*)reparse_point_buf);
789 if (params->add_image_flags & WIMLIB_ADD_IMAGE_FLAG_RPFIX &&
790 (inode->i_reparse_tag == WIM_IO_REPARSE_TAG_SYMLINK ||
791 inode->i_reparse_tag == WIM_IO_REPARSE_TAG_MOUNT_POINT))
793 enum rp_status status;
794 status = win32_do_capture_rpfix(reparse_point_buf,
796 params->capture_root_ino,
797 params->capture_root_dev);
798 if (status == RP_EXCLUDED) {
799 free_dentry(*root_p);
802 } else if (status & RP_FIXED) {
803 inode->i_not_rpfixed = 0;
806 return inode_set_unnamed_stream(inode, reparse_point_buf + 8,
807 bytesReturned - 8, params->lookup_table);
810 /* Scans an unnamed or named stream of a Win32 file (not a reparse point
811 * stream); calculates its SHA1 message digest and either creates a `struct
812 * wim_lookup_table_entry' in memory for it, or uses an existing 'struct
813 * wim_lookup_table_entry' for an identical stream.
815 * @path: Path to the file (UTF-16LE).
817 * @path_num_chars: Number of 2-byte characters in @path.
819 * @inode: WIM inode to save the stream into.
821 * @lookup_table: Stream lookup table for the WIM.
823 * @dat: A `WIN32_FIND_STREAM_DATA' structure that specifies the
826 * Returns 0 on success; nonzero on failure.
829 win32_capture_stream(const wchar_t *path,
830 size_t path_num_chars,
831 struct wim_inode *inode,
832 struct wim_lookup_table *lookup_table,
833 WIN32_FIND_STREAM_DATA *dat)
835 struct wim_ads_entry *ads_entry;
836 struct wim_lookup_table_entry *lte;
838 wchar_t *stream_name, *colon;
839 size_t stream_name_nchars;
840 bool is_named_stream;
843 size_t spath_buf_nbytes;
844 const wchar_t *relpath_prefix;
845 const wchar_t *colonchar;
847 DEBUG("Capture \"%ls\" stream \"%ls\"", path, dat->cStreamName);
849 /* The stream name should be returned as :NAME:TYPE */
850 stream_name = dat->cStreamName;
851 if (*stream_name != L':')
852 goto out_invalid_stream_name;
854 colon = wcschr(stream_name, L':');
856 goto out_invalid_stream_name;
858 if (wcscmp(colon + 1, L"$DATA")) {
859 /* Not a DATA stream */
866 stream_name_nchars = colon - stream_name;
867 is_named_stream = (stream_name_nchars != 0);
869 if (is_named_stream) {
870 /* Allocate an ADS entry for the named stream. */
871 ads_entry = inode_add_ads_utf16le(inode, stream_name,
872 stream_name_nchars * sizeof(wchar_t));
874 ret = WIMLIB_ERR_NOMEM;
879 /* Create a UTF-16LE string @spath that gives the filename, then a
880 * colon, then the stream name. Or, if it's an unnamed stream, just the
881 * filename. It is MALLOC()'ed so that it can be saved in the
882 * wim_lookup_table_entry if needed.
884 * As yet another special case, relative paths need to be changed to
885 * begin with an explicit "./" so that, for example, a file t:ads, where
886 * :ads is the part we added, is not interpreted as a file on the t:
888 spath_nchars = path_num_chars;
889 relpath_prefix = L"";
891 if (is_named_stream) {
892 spath_nchars += 1 + stream_name_nchars;
894 if (path_num_chars == 1 &&
899 relpath_prefix = L"./";
903 spath_buf_nbytes = (spath_nchars + 1) * sizeof(wchar_t);
904 spath = MALLOC(spath_buf_nbytes);
906 swprintf(spath, L"%ls%ls%ls%ls",
907 relpath_prefix, path, colonchar, stream_name);
909 /* Make a new wim_lookup_table_entry */
910 lte = new_lookup_table_entry();
912 ret = WIMLIB_ERR_NOMEM;
915 lte->file_on_disk = spath;
917 if (inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED && !is_named_stream)
918 lte->resource_location = RESOURCE_WIN32_ENCRYPTED;
920 lte->resource_location = RESOURCE_WIN32;
921 lte->resource_entry.original_size = (u64)dat->StreamSize.QuadPart;
924 if (is_named_stream) {
925 stream_id = ads_entry->stream_id;
926 ads_entry->lte = lte;
931 lookup_table_insert_unhashed(lookup_table, lte, inode, stream_id);
937 out_invalid_stream_name:
938 ERROR("Invalid stream name: \"%ls:%ls\"", path, dat->cStreamName);
939 ret = WIMLIB_ERR_READ;
943 /* Scans a Win32 file for unnamed and named data streams (not reparse point
946 * @path: Path to the file (UTF-16LE).
948 * @path_num_chars: Number of 2-byte characters in @path.
950 * @inode: WIM inode to save the stream into.
952 * @lookup_table: Stream lookup table for the WIM.
954 * @file_size: Size of unnamed data stream. (Used only if alternate
955 * data streams API appears to be unavailable.)
957 * @vol_flags: Flags that specify features of the volume being
960 * Returns 0 on success; nonzero on failure.
963 win32_capture_streams(const wchar_t *path,
964 size_t path_num_chars,
965 struct wim_inode *inode,
966 struct wim_lookup_table *lookup_table,
970 WIN32_FIND_STREAM_DATA dat;
975 DEBUG("Capturing streams from \"%ls\"", path);
977 if (win32func_FindFirstStreamW == NULL ||
978 !(vol_flags & FILE_NAMED_STREAMS))
981 hFind = win32func_FindFirstStreamW(path, FindStreamInfoStandard, &dat, 0);
982 if (hFind == INVALID_HANDLE_VALUE) {
983 err = GetLastError();
984 if (err == ERROR_CALL_NOT_IMPLEMENTED)
987 /* Seems legal for this to return ERROR_HANDLE_EOF on reparse
988 * points and directories */
989 if ((inode->i_attributes &
990 (FILE_ATTRIBUTE_REPARSE_POINT | FILE_ATTRIBUTE_DIRECTORY))
991 && err == ERROR_HANDLE_EOF)
993 DEBUG("ERROR_HANDLE_EOF (ok)");
996 if (err == ERROR_ACCESS_DENIED) {
997 ERROR("Failed to look up data streams "
998 "of \"%ls\": Access denied!\n%ls",
999 path, capture_access_denied_msg);
1000 return WIMLIB_ERR_READ;
1002 ERROR("Failed to look up data streams "
1003 "of \"%ls\"", path);
1005 return WIMLIB_ERR_READ;
1010 ret = win32_capture_stream(path,
1012 inode, lookup_table,
1015 goto out_find_close;
1016 } while (win32func_FindNextStreamW(hFind, &dat));
1017 err = GetLastError();
1018 if (err != ERROR_HANDLE_EOF) {
1019 ERROR("Win32 API: Error reading data streams from \"%ls\"", path);
1021 ret = WIMLIB_ERR_READ;
1027 /* FindFirstStreamW() API is not available, or the volume does not
1028 * support named streams. Only capture the unnamed data stream. */
1029 DEBUG("Only capturing unnamed data stream");
1030 if (inode->i_attributes &
1031 (FILE_ATTRIBUTE_REPARSE_POINT | FILE_ATTRIBUTE_DIRECTORY))
1035 /* Just create our own WIN32_FIND_STREAM_DATA for an unnamed
1036 * stream to reduce the code to a call to the
1037 * already-implemented win32_capture_stream() */
1038 wcscpy(dat.cStreamName, L"::$DATA");
1039 dat.StreamSize.QuadPart = file_size;
1040 ret = win32_capture_stream(path,
1042 inode, lookup_table,
1049 win32_build_dentry_tree_recursive(struct wim_dentry **root_ret,
1051 size_t path_num_chars,
1052 struct add_image_params *params,
1053 struct win32_capture_state *state,
1056 struct wim_dentry *root = NULL;
1057 struct wim_inode *inode;
1062 if (exclude_path(path, path_num_chars, params->config, true)) {
1063 if (params->add_image_flags & WIMLIB_ADD_IMAGE_FLAG_ROOT) {
1064 ERROR("Cannot exclude the root directory from capture");
1065 ret = WIMLIB_ERR_INVALID_CAPTURE_CONFIG;
1068 if ((params->add_image_flags & WIMLIB_ADD_IMAGE_FLAG_EXCLUDE_VERBOSE)
1069 && params->progress_func)
1071 union wimlib_progress_info info;
1072 info.scan.cur_path = path;
1073 info.scan.excluded = true;
1074 params->progress_func(WIMLIB_PROGRESS_MSG_SCAN_DENTRY, &info);
1079 if ((params->add_image_flags & WIMLIB_ADD_IMAGE_FLAG_VERBOSE)
1080 && params->progress_func)
1082 union wimlib_progress_info info;
1083 info.scan.cur_path = path;
1084 info.scan.excluded = false;
1085 params->progress_func(WIMLIB_PROGRESS_MSG_SCAN_DENTRY, &info);
1088 HANDLE hFile = win32_open_existing_file(path,
1089 FILE_READ_DATA | FILE_READ_ATTRIBUTES);
1090 if (hFile == INVALID_HANDLE_VALUE) {
1091 err = GetLastError();
1092 ERROR("Win32 API: Failed to open \"%ls\"", path);
1094 ret = WIMLIB_ERR_OPEN;
1098 BY_HANDLE_FILE_INFORMATION file_info;
1099 if (!GetFileInformationByHandle(hFile, &file_info)) {
1100 err = GetLastError();
1101 ERROR("Win32 API: Failed to get file information for \"%ls\"",
1104 ret = WIMLIB_ERR_STAT;
1105 goto out_close_handle;
1108 /* Create a WIM dentry with an associated inode, which may be shared */
1109 ret = inode_table_new_dentry(params->inode_table,
1110 path_basename_with_len(path, path_num_chars),
1111 ((u64)file_info.nFileIndexHigh << 32) |
1112 (u64)file_info.nFileIndexLow,
1113 file_info.dwVolumeSerialNumber,
1116 goto out_close_handle;
1118 ret = win32_get_short_name(root, path);
1120 goto out_close_handle;
1122 inode = root->d_inode;
1124 if (inode->i_nlink > 1) /* Shared inode; nothing more to do */
1125 goto out_close_handle;
1127 inode->i_attributes = file_info.dwFileAttributes;
1128 inode->i_creation_time = FILETIME_to_u64(&file_info.ftCreationTime);
1129 inode->i_last_write_time = FILETIME_to_u64(&file_info.ftLastWriteTime);
1130 inode->i_last_access_time = FILETIME_to_u64(&file_info.ftLastAccessTime);
1131 inode->i_resolved = 1;
1133 params->add_image_flags &= ~(WIMLIB_ADD_IMAGE_FLAG_ROOT | WIMLIB_ADD_IMAGE_FLAG_SOURCE);
1135 if (!(params->add_image_flags & WIMLIB_ADD_IMAGE_FLAG_NO_ACLS)
1136 && (vol_flags & FILE_PERSISTENT_ACLS))
1138 ret = win32_get_security_descriptor(root, params->sd_set,
1140 params->add_image_flags);
1142 goto out_close_handle;
1145 file_size = ((u64)file_info.nFileSizeHigh << 32) |
1146 (u64)file_info.nFileSizeLow;
1148 if (inode_is_directory(inode)) {
1149 /* Directory (not a reparse point) --- recurse to children */
1151 /* But first... directories may have alternate data streams that
1152 * need to be captured. */
1153 ret = win32_capture_streams(path,
1156 params->lookup_table,
1160 goto out_close_handle;
1161 ret = win32_recurse_directory(root,
1167 } else if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT) {
1168 /* Reparse point: save the reparse tag and data. Alternate data
1169 * streams are not captured, if it's even possible for a reparse
1170 * point to have alternate data streams... */
1171 ret = win32_capture_reparse_point(&root, hFile, inode, path, params);
1173 /* Not a directory, not a reparse point; capture the default
1174 * file contents and any alternate data streams. */
1175 ret = win32_capture_streams(path,
1178 params->lookup_table,
1188 free_dentry_tree(root, params->lookup_table);
1193 win32_do_capture_warnings(const struct win32_capture_state *state,
1194 int add_image_flags)
1196 if (state->num_get_sacl_priv_notheld == 0 &&
1197 state->num_get_sd_access_denied == 0)
1201 WARNING("Built dentry tree successfully, but with the following problem(s):");
1202 if (state->num_get_sacl_priv_notheld != 0) {
1203 WARNING("Could not capture SACL (System Access Control List)\n"
1204 " on %lu files or directories.",
1205 state->num_get_sacl_priv_notheld);
1207 if (state->num_get_sd_access_denied != 0) {
1208 WARNING("Could not capture security descriptor at all\n"
1209 " on %lu files or directories.",
1210 state->num_get_sd_access_denied);
1213 "Try running the program as the Administrator to make sure all the\n"
1214 " desired metadata has been captured exactly. However, if you\n"
1215 " do not care about capturing security descriptors correctly, then\n"
1216 " nothing more needs to be done%ls\n",
1217 (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_NO_ACLS) ? L"." :
1218 L", although you might consider\n"
1219 " passing the --no-acls flag to `wimlib-imagex capture' or\n"
1220 " `wimlib-imagex append' to explicitly capture no security\n"
1224 /* Win32 version of capturing a directory tree */
1226 win32_build_dentry_tree(struct wim_dentry **root_ret,
1227 const wchar_t *root_disk_path,
1228 struct add_image_params *params)
1233 struct win32_capture_state state;
1237 path_nchars = wcslen(root_disk_path);
1238 if (path_nchars > 32767)
1239 return WIMLIB_ERR_INVALID_PARAM;
1241 ret = win32_get_file_and_vol_ids(root_disk_path,
1242 ¶ms->capture_root_ino,
1243 ¶ms->capture_root_dev);
1247 win32_get_vol_flags(root_disk_path, &vol_flags);
1249 /* There is no check for overflow later when this buffer is being used!
1250 * But the max path length on NTFS is 32767 characters, and paths need
1251 * to be written specially to even go past 260 characters, so we should
1252 * be okay with 32770 characters. */
1253 path = MALLOC(32770 * sizeof(wchar_t));
1255 return WIMLIB_ERR_NOMEM;
1257 wmemcpy(path, root_disk_path, path_nchars + 1);
1259 memset(&state, 0, sizeof(state));
1260 ret = win32_build_dentry_tree_recursive(root_ret, path,
1261 path_nchars, params,
1265 win32_do_capture_warnings(&state, params->add_image_flags);
1270 win32_set_reparse_data(HANDLE h,
1272 const struct wim_lookup_table_entry *lte,
1273 const wchar_t *path)
1280 WARNING("\"%ls\" is marked as a reparse point but had no reparse data",
1284 len = wim_resource_size(lte);
1285 if (len > 16 * 1024 - 8) {
1286 WARNING("\"%ls\": reparse data too long!", path);
1290 /* The WIM stream omits the ReparseTag and ReparseDataLength fields, so
1291 * leave 8 bytes of space for them at the beginning of the buffer, then
1292 * set them manually. */
1293 buf = alloca(len + 8);
1294 ret = read_full_resource_into_buf(lte, buf + 8, false);
1297 *(u32*)(buf + 0) = cpu_to_le32(reparse_tag);
1298 *(u16*)(buf + 4) = cpu_to_le16(len);
1299 *(u16*)(buf + 6) = 0;
1301 /* Set the reparse data on the open file using the
1302 * FSCTL_SET_REPARSE_POINT ioctl.
1304 * There are contradictions in Microsoft's documentation for this:
1306 * "If hDevice was opened without specifying FILE_FLAG_OVERLAPPED,
1307 * lpOverlapped is ignored."
1309 * --- So setting lpOverlapped to NULL is okay since it's ignored.
1311 * "If lpOverlapped is NULL, lpBytesReturned cannot be NULL. Even when an
1312 * operation returns no output data and lpOutBuffer is NULL,
1313 * DeviceIoControl makes use of lpBytesReturned. After such an
1314 * operation, the value of lpBytesReturned is meaningless."
1316 * --- So lpOverlapped not really ignored, as it affects another
1317 * parameter. This is the actual behavior: lpBytesReturned must be
1318 * specified, even though lpBytesReturned is documented as:
1320 * "Not used with this operation; set to NULL."
1322 DWORD bytesReturned;
1323 if (!DeviceIoControl(h, FSCTL_SET_REPARSE_POINT, buf, len + 8,
1325 &bytesReturned /* lpBytesReturned */,
1326 NULL /* lpOverlapped */))
1328 DWORD err = GetLastError();
1329 ERROR("Failed to set reparse data on \"%ls\"", path);
1331 return WIMLIB_ERR_WRITE;
1337 win32_set_compressed(HANDLE hFile, const wchar_t *path)
1339 USHORT format = COMPRESSION_FORMAT_DEFAULT;
1340 DWORD bytesReturned = 0;
1341 if (!DeviceIoControl(hFile, FSCTL_SET_COMPRESSION,
1342 &format, sizeof(USHORT),
1344 &bytesReturned, NULL))
1346 /* Could be a warning only, but we only call this if the volume
1347 * supports compression. So I'm calling this an error. */
1348 DWORD err = GetLastError();
1349 ERROR("Failed to set compression flag on \"%ls\"", path);
1351 return WIMLIB_ERR_WRITE;
1357 win32_set_sparse(HANDLE hFile, const wchar_t *path)
1359 DWORD bytesReturned = 0;
1360 if (!DeviceIoControl(hFile, FSCTL_SET_SPARSE,
1363 &bytesReturned, NULL))
1365 /* Could be a warning only, but we only call this if the volume
1366 * supports sparse files. So I'm calling this an error. */
1367 DWORD err = GetLastError();
1368 WARNING("Failed to set sparse flag on \"%ls\"", path);
1370 return WIMLIB_ERR_WRITE;
1376 * Sets the security descriptor on an extracted file.
1379 win32_set_security_data(const struct wim_inode *inode,
1380 const wchar_t *path,
1381 struct apply_args *args)
1383 PSECURITY_DESCRIPTOR descriptor;
1387 descriptor = wim_const_security_data(args->w)->descriptors[inode->i_security_id];
1389 SECURITY_INFORMATION securityInformation = DACL_SECURITY_INFORMATION |
1390 SACL_SECURITY_INFORMATION |
1391 OWNER_SECURITY_INFORMATION |
1392 GROUP_SECURITY_INFORMATION;
1394 if (SetFileSecurityW(path, securityInformation, descriptor))
1396 err = GetLastError();
1397 if (args->extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_ACLS)
1400 case ERROR_PRIVILEGE_NOT_HELD:
1401 if (securityInformation & SACL_SECURITY_INFORMATION) {
1402 n = args->num_set_sacl_priv_notheld++;
1403 securityInformation &= ~SACL_SECURITY_INFORMATION;
1404 if (n < MAX_SET_SACL_PRIV_NOTHELD_WARNINGS) {
1406 "We don't have enough privileges to set the full security\n"
1407 " descriptor on \"%ls\"!\n", path);
1408 if (args->num_set_sd_access_denied +
1409 args->num_set_sacl_priv_notheld == 1)
1411 WARNING("%ls", apply_access_denied_msg);
1413 WARNING("Re-trying with SACL omitted.\n", path);
1414 } else if (n == MAX_GET_SACL_PRIV_NOTHELD_WARNINGS) {
1416 "Suppressing further 'privileges not held' error messages when setting\n"
1417 " security descriptors.");
1422 case ERROR_INVALID_OWNER:
1423 case ERROR_ACCESS_DENIED:
1424 n = args->num_set_sd_access_denied++;
1425 if (n < MAX_SET_SD_ACCESS_DENIED_WARNINGS) {
1426 WARNING("Failed to set security descriptor on \"%ls\": "
1427 "Access denied!\n", path);
1428 if (args->num_set_sd_access_denied +
1429 args->num_set_sacl_priv_notheld == 1)
1431 WARNING("%ls", apply_access_denied_msg);
1433 } else if (n == MAX_SET_SD_ACCESS_DENIED_WARNINGS) {
1435 "Suppressing further access denied error messages when setting\n"
1436 " security descriptors");
1441 ERROR("Failed to set security descriptor on \"%ls\"", path);
1443 return WIMLIB_ERR_WRITE;
1449 win32_extract_chunk(const void *buf, size_t len, void *arg)
1451 HANDLE hStream = arg;
1453 DWORD nbytes_written;
1454 wimlib_assert(len <= 0xffffffff);
1456 if (!WriteFile(hStream, buf, len, &nbytes_written, NULL) ||
1457 nbytes_written != len)
1459 DWORD err = GetLastError();
1460 ERROR("WriteFile(): write error");
1462 return WIMLIB_ERR_WRITE;
1468 do_win32_extract_stream(HANDLE hStream, struct wim_lookup_table_entry *lte)
1470 return extract_wim_resource(lte, wim_resource_size(lte),
1471 win32_extract_chunk, hStream);
1475 do_win32_extract_encrypted_stream(const wchar_t *path,
1476 const struct wim_lookup_table_entry *lte)
1478 ERROR("Extracting encryted streams not implemented");
1479 return WIMLIB_ERR_INVALID_PARAM;
1483 path_is_root_of_drive(const wchar_t *path)
1488 if (*path != L'/' && *path != L'\\') {
1489 if (*(path + 1) == L':')
1494 while (*path == L'/' || *path == L'\\')
1496 return (*path == L'\0');
1500 win32_get_create_flags_and_attributes(DWORD i_attributes)
1505 * Some attributes cannot be set by passing them to CreateFile(). In
1508 * FILE_ATTRIBUTE_DIRECTORY:
1509 * CreateDirectory() must be called instead of CreateFile().
1511 * FILE_ATTRIBUTE_SPARSE_FILE:
1513 * See: win32_set_sparse().
1515 * FILE_ATTRIBUTE_COMPRESSED:
1516 * Not clear from the documentation, but apparently this needs an
1518 * See: win32_set_compressed().
1520 * FILE_ATTRIBUTE_REPARSE_POINT:
1521 * Needs an ioctl, with the reparse data specified.
1522 * See: win32_set_reparse_data().
1524 * In addition, clear any file flags in the attributes that we don't
1525 * want, but also specify FILE_FLAG_OPEN_REPARSE_POINT and
1526 * FILE_FLAG_BACKUP_SEMANTICS as we are a backup application.
1528 attributes = i_attributes & ~(FILE_ATTRIBUTE_SPARSE_FILE |
1529 FILE_ATTRIBUTE_COMPRESSED |
1530 FILE_ATTRIBUTE_REPARSE_POINT |
1531 FILE_ATTRIBUTE_DIRECTORY |
1532 FILE_FLAG_DELETE_ON_CLOSE |
1533 FILE_FLAG_NO_BUFFERING |
1534 FILE_FLAG_OPEN_NO_RECALL |
1535 FILE_FLAG_OVERLAPPED |
1536 FILE_FLAG_RANDOM_ACCESS |
1537 /*FILE_FLAG_SESSION_AWARE |*/
1538 FILE_FLAG_SEQUENTIAL_SCAN |
1539 FILE_FLAG_WRITE_THROUGH);
1541 FILE_FLAG_OPEN_REPARSE_POINT |
1542 FILE_FLAG_BACKUP_SEMANTICS;
1546 inode_has_special_attributes(const struct wim_inode *inode)
1548 return (inode->i_attributes & (FILE_ATTRIBUTE_COMPRESSED |
1549 FILE_ATTRIBUTE_REPARSE_POINT |
1550 FILE_ATTRIBUTE_SPARSE_FILE)) != 0;
1553 /* Set compression or sparse attributes, and reparse data, if supported by the
1556 win32_set_special_attributes(HANDLE hFile, const struct wim_inode *inode,
1557 struct wim_lookup_table_entry *unnamed_stream_lte,
1558 const wchar_t *path, unsigned vol_flags)
1562 if (inode->i_attributes & FILE_ATTRIBUTE_COMPRESSED) {
1563 if (vol_flags & FILE_FILE_COMPRESSION) {
1564 DEBUG("Setting compression flag on \"%ls\"", path);
1565 ret = win32_set_compressed(hFile, path);
1569 DEBUG("Cannot set compression attribute on \"%ls\": "
1570 "volume does not support transparent compression",
1575 if (inode->i_attributes & FILE_ATTRIBUTE_SPARSE_FILE) {
1576 if (vol_flags & FILE_SUPPORTS_SPARSE_FILES) {
1577 DEBUG("Setting sparse flag on \"%ls\"", path);
1578 ret = win32_set_sparse(hFile, path);
1582 DEBUG("Cannot set sparse attribute on \"%ls\": "
1583 "volume does not support sparse files",
1588 if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT) {
1589 if (vol_flags & FILE_SUPPORTS_REPARSE_POINTS) {
1590 DEBUG("Setting reparse data on \"%ls\"", path);
1591 ret = win32_set_reparse_data(hFile, inode->i_reparse_tag,
1592 unnamed_stream_lte, path);
1596 DEBUG("Cannot set reparse data on \"%ls\": volume "
1597 "does not support reparse points", path);
1605 win32_extract_stream(const struct wim_inode *inode,
1606 const wchar_t *path,
1607 const wchar_t *stream_name_utf16,
1608 struct wim_lookup_table_entry *lte,
1611 wchar_t *stream_path;
1615 DWORD creationDisposition = CREATE_ALWAYS;
1617 if (stream_name_utf16) {
1618 /* Named stream. Create a buffer that contains the UTF-16LE
1619 * string [.\]@path:@stream_name_utf16. This is needed to
1620 * create and open the stream using CreateFileW(). I'm not
1621 * aware of any other APIs to do this. Note: the '$DATA' suffix
1622 * seems to be unneeded. Additional note: a "./" prefix needs
1623 * to be added when the path is not absolute to avoid ambiguity
1624 * with drive letters. */
1625 size_t stream_path_nchars;
1627 size_t stream_name_nchars;
1628 const wchar_t *prefix;
1630 path_nchars = wcslen(path);
1631 stream_name_nchars = wcslen(stream_name_utf16);
1632 stream_path_nchars = path_nchars + 1 + stream_name_nchars;
1633 if (path[0] != cpu_to_le16(L'\0') &&
1634 path[0] != cpu_to_le16(L'/') &&
1635 path[0] != cpu_to_le16(L'\\') &&
1636 path[1] != cpu_to_le16(L':'))
1639 stream_path_nchars += 2;
1643 stream_path = alloca((stream_path_nchars + 1) * sizeof(wchar_t));
1644 swprintf(stream_path, L"%ls%ls:%ls",
1645 prefix, path, stream_name_utf16);
1647 /* Unnamed stream; its path is just the path to the file itself.
1649 stream_path = (wchar_t*)path;
1651 /* Directories must be created with CreateDirectoryW(). Then
1652 * the call to CreateFileW() will merely open the directory that
1653 * was already created rather than creating a new file. */
1654 if (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY) {
1655 if (!CreateDirectoryW(stream_path, NULL)) {
1656 err = GetLastError();
1658 case ERROR_ALREADY_EXISTS:
1660 case ERROR_ACCESS_DENIED:
1661 if (path_is_root_of_drive(path))
1665 ERROR("Failed to create directory \"%ls\"",
1668 ret = WIMLIB_ERR_MKDIR;
1672 DEBUG("Created directory \"%ls\"", stream_path);
1673 if (!inode_has_special_attributes(inode)) {
1677 DEBUG("Directory \"%ls\" has special attributes!",
1679 creationDisposition = OPEN_EXISTING;
1683 DEBUG("Opening \"%ls\"", stream_path);
1684 h = CreateFileW(stream_path,
1685 GENERIC_READ | GENERIC_WRITE,
1688 creationDisposition,
1689 win32_get_create_flags_and_attributes(inode->i_attributes),
1691 if (h == INVALID_HANDLE_VALUE) {
1692 err = GetLastError();
1693 ERROR("Failed to create \"%ls\"", stream_path);
1695 ret = WIMLIB_ERR_OPEN;
1699 if (stream_name_utf16 == NULL && inode_has_special_attributes(inode)) {
1700 ret = win32_set_special_attributes(h, inode, lte, path,
1703 goto fail_close_handle;
1706 if (!(inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT)) {
1708 DEBUG("Extracting \"%ls\" (len = %"PRIu64")",
1709 stream_path, wim_resource_size(lte));
1710 if (inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED
1711 && stream_name_utf16 == NULL
1712 && (vol_flags & FILE_SUPPORTS_ENCRYPTION))
1714 ret = do_win32_extract_encrypted_stream(stream_path,
1717 ret = do_win32_extract_stream(h, lte);
1720 goto fail_close_handle;
1724 DEBUG("Closing \"%ls\"", stream_path);
1725 if (!CloseHandle(h)) {
1726 err = GetLastError();
1727 ERROR("Failed to close \"%ls\"", stream_path);
1729 ret = WIMLIB_ERR_WRITE;
1737 ERROR("Error extracting %ls", stream_path);
1743 * Creates a file, directory, or reparse point and extracts all streams to it
1744 * (unnamed data stream and/or reparse point stream, plus any alternate data
1745 * streams). This in Win32-specific code.
1747 * @inode: WIM inode for this file or directory.
1748 * @path: UTF-16LE external path to extract the inode to.
1750 * Returns 0 on success; nonzero on failure.
1753 win32_extract_streams(const struct wim_inode *inode,
1754 const wchar_t *path, u64 *completed_bytes_p,
1757 struct wim_lookup_table_entry *unnamed_lte;
1760 unnamed_lte = inode_unnamed_lte_resolved(inode);
1761 ret = win32_extract_stream(inode, path, NULL, unnamed_lte,
1765 if (unnamed_lte && inode->i_extracted_file == NULL)
1766 *completed_bytes_p += wim_resource_size(unnamed_lte);
1768 if (!(vol_flags & FILE_NAMED_STREAMS))
1770 for (u16 i = 0; i < inode->i_num_ads; i++) {
1771 const struct wim_ads_entry *ads_entry = &inode->i_ads_entries[i];
1772 if (ads_entry->stream_name_nbytes != 0) {
1773 /* Skip special UNIX data entries (see documentation for
1774 * WIMLIB_ADD_IMAGE_FLAG_UNIX_DATA) */
1775 if (ads_entry->stream_name_nbytes == WIMLIB_UNIX_DATA_TAG_UTF16LE_NBYTES
1776 && !memcmp(ads_entry->stream_name,
1777 WIMLIB_UNIX_DATA_TAG_UTF16LE,
1778 WIMLIB_UNIX_DATA_TAG_UTF16LE_NBYTES))
1780 ret = win32_extract_stream(inode,
1782 ads_entry->stream_name,
1787 if (ads_entry->lte && inode->i_extracted_file == NULL)
1788 *completed_bytes_p += wim_resource_size(ads_entry->lte);
1795 /* Extract a file, directory, reparse point, or hard link to an
1796 * already-extracted file using the Win32 API */
1798 win32_do_apply_dentry(const wchar_t *output_path,
1799 size_t output_path_num_chars,
1800 struct wim_dentry *dentry,
1801 struct apply_args *args)
1804 struct wim_inode *inode = dentry->d_inode;
1807 if (!args->have_vol_flags) {
1808 win32_get_vol_flags(output_path, &args->vol_flags);
1809 args->have_vol_flags = true;
1810 /* Warn the user about data that may not be extracted. */
1811 if (!(args->vol_flags & FILE_SUPPORTS_SPARSE_FILES))
1812 WARNING("Volume does not support sparse files!\n"
1813 " Sparse files will be extracted as non-sparse.");
1814 if (!(args->vol_flags & FILE_SUPPORTS_REPARSE_POINTS))
1815 WARNING("Volume does not support reparse points!\n"
1816 " Reparse point data will not be extracted.");
1817 if (!(args->vol_flags & FILE_NAMED_STREAMS)) {
1818 WARNING("Volume does not support named data streams!\n"
1819 " Named data streams will not be extracted.");
1821 if (!(args->vol_flags & FILE_SUPPORTS_ENCRYPTION)) {
1822 WARNING("Volume does not support encryption!\n"
1823 " Encrypted files will be extracted as raw data.");
1825 if (!(args->vol_flags & FILE_FILE_COMPRESSION)) {
1826 WARNING("Volume does not support transparent compression!\n"
1827 " Compressed files will be extracted as non-compressed.");
1829 if (!(args->vol_flags & FILE_PERSISTENT_ACLS)) {
1830 if (args->extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_ACLS) {
1831 ERROR("Strict ACLs requested, but the volume does not "
1833 return WIMLIB_ERR_VOLUME_LACKS_FEATURES;
1835 WARNING("Volume does not support persistent ACLS!\n"
1836 " File permissions will not be extracted.");
1841 if (inode->i_nlink > 1 && inode->i_extracted_file != NULL) {
1842 /* Linked file, with another name already extracted. Create a
1845 /* There is a volume flag for this (FILE_SUPPORTS_HARD_LINKS),
1846 * but it's only available on Windows 7 and later. So no use
1847 * even checking it, really. Instead, CreateHardLinkW() will
1848 * apparently return ERROR_INVALID_FUNCTION if the volume does
1849 * not support hard links. */
1850 DEBUG("Creating hard link \"%ls => %ls\"",
1851 output_path, inode->i_extracted_file);
1852 if (CreateHardLinkW(output_path, inode->i_extracted_file, NULL))
1855 err = GetLastError();
1856 if (err != ERROR_INVALID_FUNCTION) {
1857 ERROR("Can't create hard link \"%ls => %ls\"",
1858 output_path, inode->i_extracted_file);
1860 return WIMLIB_ERR_LINK;
1862 args->num_hard_links_failed++;
1863 if (args->num_hard_links_failed < MAX_CREATE_HARD_LINK_WARNINGS) {
1864 WARNING("Can't create hard link \"%ls => %ls\":\n"
1865 " Volume does not support hard links!\n"
1866 " Falling back to extracting a copy of the file.",
1867 output_path, inode->i_extracted_file);
1868 } else if (args->num_hard_links_failed == MAX_CREATE_HARD_LINK_WARNINGS) {
1869 WARNING("Suppressing further hard linking warnings...");
1874 if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT &&
1875 !(args->vol_flags & FILE_SUPPORTS_REPARSE_POINTS))
1877 WARNING("Skipping extraction of reparse point \"%ls\":\n"
1878 " Not supported by destination filesystem",
1880 struct wim_lookup_table_entry *lte;
1881 lte = inode_unnamed_lte_resolved(inode);
1883 args->progress.extract.completed_bytes += wim_resource_size(lte);
1887 /* Create the file, directory, or reparse point, and extract the
1889 ret = win32_extract_streams(inode, output_path,
1890 &args->progress.extract.completed_bytes,
1895 if (inode->i_security_id >= 0 &&
1896 !(args->extract_flags & WIMLIB_EXTRACT_FLAG_NO_ACLS)
1897 && (args->vol_flags & FILE_PERSISTENT_ACLS))
1899 ret = win32_set_security_data(inode, output_path, args);
1903 if (inode->i_nlink > 1) {
1904 /* Save extracted path for a later call to
1905 * CreateHardLinkW() if this inode has multiple links.
1907 inode->i_extracted_file = WSTRDUP(output_path);
1908 if (!inode->i_extracted_file)
1909 ret = WIMLIB_ERR_NOMEM;
1914 /* Set timestamps on an extracted file using the Win32 API */
1916 win32_do_apply_dentry_timestamps(const wchar_t *path,
1917 size_t path_num_chars,
1918 const struct wim_dentry *dentry,
1919 const struct apply_args *args)
1923 const struct wim_inode *inode = dentry->d_inode;
1925 if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT &&
1926 !(args->vol_flags & FILE_SUPPORTS_REPARSE_POINTS))
1928 /* Skip reparse points not extracted */
1932 /* Windows doesn't let you change the timestamps of the root directory
1933 * (at least on FAT, which is dumb but expected since FAT doesn't store
1934 * any metadata about the root directory...) */
1935 if (path_is_root_of_drive(path))
1938 DEBUG("Opening \"%ls\" to set timestamps", path);
1939 h = win32_open_existing_file(path, FILE_WRITE_ATTRIBUTES);
1940 if (h == INVALID_HANDLE_VALUE) {
1941 err = GetLastError();
1945 FILETIME creationTime = {.dwLowDateTime = inode->i_creation_time & 0xffffffff,
1946 .dwHighDateTime = inode->i_creation_time >> 32};
1947 FILETIME lastAccessTime = {.dwLowDateTime = inode->i_last_access_time & 0xffffffff,
1948 .dwHighDateTime = inode->i_last_access_time >> 32};
1949 FILETIME lastWriteTime = {.dwLowDateTime = inode->i_last_write_time & 0xffffffff,
1950 .dwHighDateTime = inode->i_last_write_time >> 32};
1952 DEBUG("Calling SetFileTime() on \"%ls\"", path);
1953 if (!SetFileTime(h, &creationTime, &lastAccessTime, &lastWriteTime)) {
1954 err = GetLastError();
1958 DEBUG("Closing \"%ls\"", path);
1959 if (!CloseHandle(h)) {
1960 err = GetLastError();
1965 /* Only warn if setting timestamps failed; still return 0. */
1966 WARNING("Can't set timestamps on \"%ls\"", path);
1972 /* Replacement for POSIX fsync() */
1979 h = (HANDLE)_get_osfhandle(fd);
1980 if (h == INVALID_HANDLE_VALUE) {
1981 err = GetLastError();
1982 ERROR("Could not get Windows handle for file descriptor");
1987 if (!FlushFileBuffers(h)) {
1988 err = GetLastError();
1989 ERROR("Could not flush file buffers to disk");
1997 /* Use the Win32 API to get the number of processors */
1999 win32_get_number_of_processors()
2001 SYSTEM_INFO sysinfo;
2002 GetSystemInfo(&sysinfo);
2003 return sysinfo.dwNumberOfProcessors;
2006 /* Replacement for POSIX-2008 realpath(). Warning: partial functionality only
2007 * (resolved_path must be NULL). Also I highly doubt that GetFullPathName
2008 * really does the right thing under all circumstances. */
2010 realpath(const wchar_t *path, wchar_t *resolved_path)
2013 wimlib_assert(resolved_path == NULL);
2016 ret = GetFullPathNameW(path, 0, NULL, NULL);
2018 err = GetLastError();
2022 resolved_path = TMALLOC(ret);
2025 ret = GetFullPathNameW(path, ret, resolved_path, NULL);
2027 err = GetLastError();
2028 free(resolved_path);
2029 resolved_path = NULL;
2037 return resolved_path;
2040 /* rename() on Windows fails if the destination file exists. And we need to
2041 * make it work on wide characters. Fix it. */
2043 win32_rename_replacement(const wchar_t *oldpath, const wchar_t *newpath)
2045 if (MoveFileExW(oldpath, newpath, MOVEFILE_REPLACE_EXISTING)) {
2048 /* As usual, the possible error values are not documented */
2049 DWORD err = GetLastError();
2050 ERROR("MoveFileEx(): Can't rename \"%ls\" to \"%ls\"",
2058 /* Replacement for POSIX fnmatch() (partial functionality only) */
2060 fnmatch(const wchar_t *pattern, const wchar_t *string, int flags)
2062 if (PathMatchSpecW(string, pattern))
2068 /* truncate() replacement */
2070 win32_truncate_replacement(const wchar_t *path, off_t size)
2072 DWORD err = NO_ERROR;
2073 LARGE_INTEGER liOffset;
2075 HANDLE h = win32_open_existing_file(path, GENERIC_WRITE);
2076 if (h == INVALID_HANDLE_VALUE)
2079 liOffset.QuadPart = size;
2080 if (!SetFilePointerEx(h, liOffset, NULL, FILE_BEGIN))
2081 goto fail_close_handle;
2083 if (!SetEndOfFile(h))
2084 goto fail_close_handle;
2089 err = GetLastError();
2092 if (err == NO_ERROR)
2093 err = GetLastError();
2094 ERROR("Can't truncate \"%ls\" to %"PRIu64" bytes", path, size);
2101 /* This really could be replaced with _wcserror_s, but this doesn't seem to
2102 * actually be available in MSVCRT.DLL on Windows XP (perhaps it's statically
2103 * linked in by Visual Studio...?). */
2105 win32_strerror_r_replacement(int errnum, wchar_t *buf, size_t buflen)
2107 static pthread_mutex_t strerror_lock = PTHREAD_MUTEX_INITIALIZER;
2109 pthread_mutex_lock(&strerror_lock);
2110 mbstowcs(buf, strerror(errnum), buflen);
2111 buf[buflen - 1] = '\0';
2112 pthread_mutex_unlock(&strerror_lock);
2116 #endif /* __WIN32__ */