/* * win32.c * * All the library code specific to native Windows builds is in here. */ /* * Copyright (C) 2013 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/. */ #ifndef __WIN32__ # error "This file contains Windows code" #endif #include "config.h" #include #include #include #include /* shlwapi.h for PathMatchSpecA() */ #ifdef ERROR /* windows.h defines this */ # undef ERROR #endif #include "win32.h" #include "dentry.h" #include "lookup_table.h" #include "security.h" #include "endianness.h" #include #ifdef ENABLE_ERROR_MESSAGES void win32_error(u32 err_code) { char *buffer; DWORD nchars; nchars = FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER, NULL, err_code, 0, (char*)&buffer, 0, NULL); if (nchars == 0) { ERROR("Error printing error message! " "Computer will self-destruct in 3 seconds."); } else { ERROR("Win32 error: %s", buffer); LocalFree(buffer); } } void win32_error_last() { win32_error(GetLastError()); } #endif HANDLE win32_open_file_readonly(const wchar_t *path, bool data_only) { DWORD dwDesiredAccess = FILE_READ_DATA; if (!data_only) dwDesiredAccess |= FILE_READ_ATTRIBUTES | READ_CONTROL | ACCESS_SYSTEM_SECURITY; return CreateFileW(path, dwDesiredAccess, FILE_SHARE_READ, NULL, /* lpSecurityAttributes */ OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OPEN_REPARSE_POINT, NULL /* hTemplateFile */); } int win32_read_file(const mbchar *filename, void *handle, u64 offset, size_t size, void *buf) { HANDLE h = handle; DWORD err; DWORD bytesRead; LARGE_INTEGER liOffset = {.QuadPart = offset}; wimlib_assert(size <= 0xffffffff); if (SetFilePointerEx(h, liOffset, NULL, FILE_BEGIN)) if (ReadFile(h, buf, size, &bytesRead, NULL) && bytesRead == size) return 0; err = GetLastError(); ERROR("Error reading \"%s\"", filename); win32_error(err); return WIMLIB_ERR_READ; } void win32_close_file(void *handle) { CloseHandle((HANDLE)handle); } static u64 FILETIME_to_u64(const FILETIME *ft) { return ((u64)ft->dwHighDateTime << 32) | (u64)ft->dwLowDateTime; } static int win32_get_short_name(struct wim_dentry *dentry, const wchar_t *path_utf16) { WIN32_FIND_DATAW dat; if (FindFirstFileW(path_utf16, &dat) && dat.cAlternateFileName[0] != L'\0') { size_t short_name_nbytes = wcslen(dat.cAlternateFileName) * 2; size_t n = short_name_nbytes + sizeof(wchar_t); dentry->short_name = MALLOC(n); if (!dentry->short_name) return WIMLIB_ERR_NOMEM; memcpy(dentry->short_name, dat.cAlternateFileName, n); dentry->short_name_nbytes = short_name_nbytes; } return 0; } static int win32_get_security_descriptor(struct wim_dentry *dentry, struct sd_set *sd_set, const wchar_t *path_utf16) { SECURITY_INFORMATION requestedInformation; DWORD lenNeeded = 0; BOOL status; DWORD err; requestedInformation = DACL_SECURITY_INFORMATION | SACL_SECURITY_INFORMATION | OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION; /* Request length of security descriptor */ status = GetFileSecurityW(path_utf16, requestedInformation, NULL, 0, &lenNeeded); err = GetLastError(); if (!status && err == ERROR_INSUFFICIENT_BUFFER) { DWORD len = lenNeeded; char buf[len]; if (GetFileSecurityW(path_utf16, requestedInformation, (PSECURITY_DESCRIPTOR)buf, len, &lenNeeded)) { int security_id = sd_set_add_sd(sd_set, buf, len); if (security_id < 0) return WIMLIB_ERR_NOMEM; else { dentry->d_inode->i_security_id = security_id; return 0; } } else { err = GetLastError(); } } ERROR("Win32 API: Failed to read security descriptor of \"%ls\"", path_utf16); win32_error(err); return WIMLIB_ERR_READ; } /* Reads the directory entries of directory using a Win32 API and recursively * calls win32_build_dentry_tree() on them. */ static int win32_recurse_directory(struct wim_dentry *root, const mbchar *root_disk_path, struct wim_lookup_table *lookup_table, struct wim_security_data *sd, const struct capture_config *config, int add_image_flags, wimlib_progress_func_t progress_func, struct sd_set *sd_set, const wchar_t *path_utf16, size_t path_utf16_nchars) { WIN32_FIND_DATAW dat; HANDLE hFind; DWORD err; int ret; { /* Begin reading the directory by calling FindFirstFileW. * Unlike UNIX opendir(), FindFirstFileW has file globbing built * into it. But this isn't what we actually want, so just add a * dummy glob to get all entries. */ wchar_t pattern_buf[path_utf16_nchars + 3]; memcpy(pattern_buf, path_utf16, path_utf16_nchars * sizeof(wchar_t)); pattern_buf[path_utf16_nchars] = L'/'; pattern_buf[path_utf16_nchars + 1] = L'*'; pattern_buf[path_utf16_nchars + 2] = L'\0'; hFind = FindFirstFileW(pattern_buf, &dat); } if (hFind == INVALID_HANDLE_VALUE) { err = GetLastError(); if (err == ERROR_FILE_NOT_FOUND) { return 0; } else { ERROR("Win32 API: Failed to read directory \"%s\"", root_disk_path); win32_error(err); return WIMLIB_ERR_READ; } } ret = 0; do { /* Skip . and .. entries */ if (!(dat.cFileName[0] == L'.' && (dat.cFileName[1] == L'\0' || (dat.cFileName[1] == L'.' && dat.cFileName[2] == L'\0')))) { struct wim_dentry *child; char *mbs_name; size_t mbs_name_nbytes; ret = utf16le_to_mbs(dat.cFileName, wcslen(dat.cFileName) * sizeof(wchar_t), &mbs_name, &mbs_name_nbytes); if (ret) goto out_find_close; char name[strlen(root_disk_path) + 1 + mbs_name_nbytes + 1]; sprintf(name, "%s/%s", root_disk_path, mbs_name); FREE(mbs_name); ret = win32_build_dentry_tree(&child, name, lookup_table, sd, config, add_image_flags, progress_func, sd_set); if (ret) goto out_find_close; if (child) dentry_add_child(root, child); } } while (FindNextFileW(hFind, &dat)); err = GetLastError(); if (err != ERROR_NO_MORE_FILES) { ERROR("Win32 API: Failed to read directory \"%s\"", root_disk_path); win32_error(err); if (ret == 0) ret = WIMLIB_ERR_READ; } out_find_close: FindClose(hFind); return ret; } /* Load a reparse point into a WIM inode. It is just stored in memory. * * @hFile: Open handle to a reparse point, with permission to read the reparse * data. * * @inode: WIM inode for the reparse point. * * @lookup_table: Stream lookup table for the WIM; an entry will be added to it * for the reparse point unless an entry already exists for * the exact same data stream. * * @path: External path to the parse point (UTF-8). Used for error messages * only. * * Returns 0 on success; nonzero on failure. */ static int win32_capture_reparse_point(HANDLE hFile, struct wim_inode *inode, struct wim_lookup_table *lookup_table, const char *path) { /* "Reparse point data, including the tag and optional GUID, * cannot exceed 16 kilobytes." - MSDN */ char reparse_point_buf[16 * 1024]; DWORD bytesReturned; if (!DeviceIoControl(hFile, FSCTL_GET_REPARSE_POINT, NULL, 0, reparse_point_buf, sizeof(reparse_point_buf), &bytesReturned, NULL)) { DWORD err = GetLastError(); ERROR("Win32 API: Failed to get reparse data of \"%s\"", path); win32_error(err); return WIMLIB_ERR_READ; } if (bytesReturned < 8) { ERROR("Reparse data on \"%s\" is invalid", path); return WIMLIB_ERR_READ; } inode->i_reparse_tag = le32_to_cpu(*(u32*)reparse_point_buf); return inode_add_ads_with_data(inode, "", (const u8*)reparse_point_buf + 8, bytesReturned - 8, lookup_table); } /* Calculate the SHA1 message digest of a Win32 data stream, which may be either * an unnamed or named data stream. * * @path: Path to the file, with the stream noted at the end for named * streams. UTF-16LE encoding. * * @hash: On success, the SHA1 message digest of the stream is written to * this location. * * Returns 0 on success; nonzero on failure. */ static int win32_sha1sum(const wchar_t *path, u8 hash[SHA1_HASH_SIZE]) { HANDLE hFile; SHA_CTX ctx; u8 buf[32768]; DWORD bytesRead; int ret; hFile = win32_open_file_readonly(path, false); if (hFile == INVALID_HANDLE_VALUE) return WIMLIB_ERR_OPEN; sha1_init(&ctx); for (;;) { if (!ReadFile(hFile, buf, sizeof(buf), &bytesRead, NULL)) { ret = WIMLIB_ERR_READ; goto out_close_handle; } if (bytesRead == 0) break; sha1_update(&ctx, buf, bytesRead); } ret = 0; sha1_final(hash, &ctx); out_close_handle: CloseHandle(hFile); return ret; } /* Scans an unnamed or named stream of a Win32 file (not a reparse point * stream); calculates its SHA1 message digest and either creates a `struct * wim_lookup_table_entry' in memory for it, or uses an existing 'struct * wim_lookup_table_entry' for an identical stream. * * @path_utf16: Path to the file (UTF-16LE). * * @path_utf16_nchars: Number of 2-byte characters in @path_utf16. * * @inode: WIM inode to save the stream into. * * @lookup_table: Stream lookup table for the WIM. * * @dat: A `WIN32_FIND_STREAM_DATA' structure that specifies the * stream name. * * Returns 0 on success; nonzero on failure. */ static int win32_capture_stream(const wchar_t *path_utf16, size_t path_utf16_nchars, struct wim_inode *inode, struct wim_lookup_table *lookup_table, WIN32_FIND_STREAM_DATA *dat) { struct wim_ads_entry *ads_entry; u8 hash[SHA1_HASH_SIZE]; struct wim_lookup_table_entry *lte; int ret; wchar_t *p, *colon; bool is_named_stream; wchar_t *spath; size_t spath_nchars; DWORD err; /* The stream name should be returned as :NAME:TYPE */ p = dat->cStreamName; if (*p != L':') goto out_invalid_stream_name; p += 1; colon = wcschr(p, L':'); if (colon == NULL) goto out_invalid_stream_name; if (wcscmp(colon + 1, L"$DATA")) { /* Not a DATA stream */ ret = 0; goto out; } is_named_stream = (p != colon); if (is_named_stream) { /* Allocate an ADS entry for the named stream. */ char *mbs_stream_name; size_t mbs_stream_name_nbytes; ret = utf16le_to_mbs(p, (colon - p) * sizeof(wchar_t), &mbs_stream_name, &mbs_stream_name_nbytes); if (ret) goto out; ads_entry = inode_add_ads(inode, mbs_stream_name); FREE(mbs_stream_name); if (!ads_entry) { ret = WIMLIB_ERR_NOMEM; goto out; } } /* Create a UTF-16 string @spath that gives the filename, then a colon, * then the stream name. Or, if it's an unnamed stream, just the * filename. It is MALLOC()'ed so that it can be saved in the * wim_lookup_table_entry if needed. */ *colon = '\0'; spath_nchars = path_utf16_nchars; if (is_named_stream) spath_nchars += colon - p + 1; spath = MALLOC((spath_nchars + 1) * sizeof(wchar_t)); memcpy(spath, path_utf16, path_utf16_nchars * sizeof(wchar_t)); if (is_named_stream) { spath[path_utf16_nchars] = L':'; memcpy(&spath[path_utf16_nchars + 1], p, (colon - p) * sizeof(wchar_t)); } spath[spath_nchars] = L'\0'; ret = win32_sha1sum(spath, hash); if (ret) { err = GetLastError(); ERROR("Win32 API: Failed to read \"%ls\" to calculate SHA1sum", path_utf16); win32_error(err); goto out_free_spath; } lte = __lookup_resource(lookup_table, hash); if (lte) { /* Use existing wim_lookup_table_entry that has the same SHA1 * message digest */ lte->refcnt++; } else { /* Make a new wim_lookup_table_entry */ lte = new_lookup_table_entry(); if (!lte) { ret = WIMLIB_ERR_NOMEM; goto out_free_spath; } lte->win32_file_on_disk = spath; lte->file_on_disk_fp = INVALID_HANDLE_VALUE; spath = NULL; lte->resource_location = RESOURCE_WIN32; lte->resource_entry.original_size = (uint64_t)dat->StreamSize.QuadPart; lte->resource_entry.size = (uint64_t)dat->StreamSize.QuadPart; copy_hash(lte->hash, hash); lookup_table_insert(lookup_table, lte); } if (is_named_stream) ads_entry->lte = lte; else inode->i_lte = lte; out_free_spath: FREE(spath); out: return ret; out_invalid_stream_name: ERROR("Invalid stream name: \"%ls:%ls\"", path_utf16, dat->cStreamName); ret = WIMLIB_ERR_READ; goto out; } /* Scans a Win32 file for unnamed and named data streams (not reparse point * streams). * * @path_utf16: Path to the file (UTF-16LE). * * @path_utf16_nchars: Number of 2-byte characters in @path_utf16. * * @inode: WIM inode to save the stream into. * * @lookup_table: Stream lookup table for the WIM. * * Returns 0 on success; nonzero on failure. */ static int win32_capture_streams(const wchar_t *path_utf16, size_t path_utf16_nchars, struct wim_inode *inode, struct wim_lookup_table *lookup_table) { WIN32_FIND_STREAM_DATA dat; int ret; HANDLE hFind; DWORD err; hFind = FindFirstStreamW(path_utf16, FindStreamInfoStandard, &dat, 0); if (hFind == INVALID_HANDLE_VALUE) { err = GetLastError(); /* Seems legal for this to return ERROR_HANDLE_EOF on reparse * points and directories */ if ((inode->i_attributes & (FILE_ATTRIBUTE_REPARSE_POINT | FILE_ATTRIBUTE_DIRECTORY)) && err == ERROR_HANDLE_EOF) { return 0; } else { ERROR("Win32 API: Failed to look up data streams of \"%ls\"", path_utf16); win32_error(err); return WIMLIB_ERR_READ; } } do { ret = win32_capture_stream(path_utf16, path_utf16_nchars, inode, lookup_table, &dat); if (ret) goto out_find_close; } while (FindNextStreamW(hFind, &dat)); err = GetLastError(); if (err != ERROR_HANDLE_EOF) { ERROR("Win32 API: Error reading data streams from \"%ls\"", path_utf16); win32_error(err); ret = WIMLIB_ERR_READ; } out_find_close: FindClose(hFind); return ret; } /* Win32 version of capturing a directory tree */ int win32_build_dentry_tree(struct wim_dentry **root_ret, const char *root_disk_path, struct wim_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 wim_dentry *root = NULL; int ret = 0; struct wim_inode *inode; wchar_t *path_utf16; size_t path_utf16_nbytes; size_t path_utf16_nchars; struct sd_set *sd_set; DWORD err; 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"); ret = WIMLIB_ERR_INVALID_CAPTURE_CONFIG; goto out; } 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); } goto out; } 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 (extra_arg == NULL) { sd_set = alloca(sizeof(struct sd_set)); sd_set->rb_root.rb_node = NULL, sd_set->sd = sd; } else { sd_set = extra_arg; } ret = mbs_to_utf16le(root_disk_path, strlen(root_disk_path), &path_utf16, &path_utf16_nbytes); if (ret) goto out_destroy_sd_set; path_utf16_nchars = path_utf16_nbytes / sizeof(wchar_t); HANDLE hFile = win32_open_file_readonly(path_utf16, false); if (hFile == INVALID_HANDLE_VALUE) { err = GetLastError(); ERROR("Win32 API: Failed to open \"%s\"", root_disk_path); win32_error(err); ret = WIMLIB_ERR_OPEN; goto out_free_path_utf16; } BY_HANDLE_FILE_INFORMATION file_info; if (!GetFileInformationByHandle(hFile, &file_info)) { err = GetLastError(); ERROR("Win32 API: Failed to get file information for \"%s\"", root_disk_path); win32_error(err); ret = WIMLIB_ERR_STAT; goto out_close_handle; } /* Create a WIM dentry */ ret = new_dentry_with_timeless_inode(path_basename(root_disk_path), &root); if (ret) goto out_close_handle; /* Start preparing the associated WIM inode */ inode = root->d_inode; inode->i_attributes = file_info.dwFileAttributes; inode->i_creation_time = FILETIME_to_u64(&file_info.ftCreationTime); inode->i_last_write_time = FILETIME_to_u64(&file_info.ftLastWriteTime); inode->i_last_access_time = FILETIME_to_u64(&file_info.ftLastAccessTime); inode->i_ino = ((u64)file_info.nFileIndexHigh << 32) | (u64)file_info.nFileIndexLow; inode->i_resolved = 1; add_image_flags &= ~(WIMLIB_ADD_IMAGE_FLAG_ROOT | WIMLIB_ADD_IMAGE_FLAG_SOURCE); /* Get DOS name and security descriptor (if any). */ ret = win32_get_short_name(root, path_utf16); if (ret) goto out_close_handle; ret = win32_get_security_descriptor(root, sd_set, path_utf16); if (ret) goto out_close_handle; if (inode_is_directory(inode)) { /* Directory (not a reparse point) --- recurse to children */ /* But first... directories may have alternate data streams that * need to be captured. */ ret = win32_capture_streams(path_utf16, path_utf16_nchars, inode, lookup_table); if (ret) goto out_close_handle; ret = win32_recurse_directory(root, root_disk_path, lookup_table, sd, config, add_image_flags, progress_func, sd_set, path_utf16, path_utf16_nchars); } else if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT) { /* Reparse point: save the reparse tag and data */ ret = win32_capture_reparse_point(hFile, inode, lookup_table, root_disk_path); } else { /* Not a directory, not a reparse point; capture the default * file contents and any alternate data streams. */ ret = win32_capture_streams(path_utf16, path_utf16_nchars, inode, lookup_table); } out_close_handle: CloseHandle(hFile); out_free_path_utf16: FREE(path_utf16); out_destroy_sd_set: if (extra_arg == NULL) destroy_sd_set(sd_set); out: if (ret == 0) *root_ret = root; else free_dentry_tree(root, lookup_table); return ret; } /* Replacement for POSIX fnmatch() (partial functionality only) */ int fnmatch(const char *pattern, const char *string, int flags) { if (PathMatchSpecA(string, pattern)) return 0; else return FNM_NOMATCH; } static int win32_set_reparse_data(HANDLE h, u32 reparse_tag, const struct wim_lookup_table_entry *lte, const wchar_t *path) { int ret; u8 *buf; size_t len; if (!lte) { WARNING("\"%ls\" is marked as a reparse point but had no reparse data", path); return 0; } len = wim_resource_size(lte); if (len > 16 * 1024 - 8) { WARNING("\"%ls\": reparse data too long!", path); return 0; } /* The WIM stream omits the ReparseTag and ReparseDataLength fields, so * leave 8 bytes of space for them at the beginning of the buffer, then * set them manually. */ buf = alloca(len + 8); ret = read_full_wim_resource(lte, buf + 8, 0); if (ret) return ret; *(u32*)(buf + 0) = cpu_to_le32(reparse_tag); *(u16*)(buf + 4) = cpu_to_le16(len); *(u16*)(buf + 6) = 0; /* Set the reparse data on the open file using the * FSCTL_SET_REPARSE_POINT ioctl. * * There are contradictions in Microsoft's documentation for this: * * "If hDevice was opened without specifying FILE_FLAG_OVERLAPPED, * lpOverlapped is ignored." * * --- So setting lpOverlapped to NULL is okay since it's ignored. * * "If lpOverlapped is NULL, lpBytesReturned cannot be NULL. Even when an * operation returns no output data and lpOutBuffer is NULL, * DeviceIoControl makes use of lpBytesReturned. After such an * operation, the value of lpBytesReturned is meaningless." * * --- So lpOverlapped not really ignored, as it affects another * parameter. This is the actual behavior: lpBytesReturned must be * specified, even though lpBytesReturned is documented as: * * "Not used with this operation; set to NULL." */ DWORD bytesReturned; if (!DeviceIoControl(h, FSCTL_SET_REPARSE_POINT, buf, len + 8, NULL, 0, &bytesReturned /* lpBytesReturned */, NULL /* lpOverlapped */)) { DWORD err = GetLastError(); ERROR("Failed to set reparse data on \"%ls\"", path); win32_error(err); return WIMLIB_ERR_WRITE; } return 0; } static int win32_extract_chunk(const void *buf, size_t len, u64 offset, void *arg) { HANDLE hStream = arg; DWORD nbytes_written; wimlib_assert(len <= 0xffffffff); if (!WriteFile(hStream, buf, len, &nbytes_written, NULL) || nbytes_written != len) { DWORD err = GetLastError(); ERROR("WriteFile(): write error"); win32_error(err); return WIMLIB_ERR_WRITE; } return 0; } static int do_win32_extract_stream(HANDLE hStream, struct wim_lookup_table_entry *lte) { return extract_wim_resource(lte, wim_resource_size(lte), win32_extract_chunk, hStream); } static int win32_extract_stream(const struct wim_inode *inode, const wchar_t *path, const wchar_t *stream_name_utf16, struct wim_lookup_table_entry *lte) { wchar_t *stream_path; HANDLE h; int ret; DWORD err; DWORD creationDisposition = CREATE_ALWAYS; if (stream_name_utf16) { /* Named stream. Create a buffer that contains the UTF-16LE * string [./]@path:@stream_name_utf16. This is needed to * create and open the stream using CreateFileW(). I'm not * aware of any other APIs to do this. Note: the '$DATA' suffix * seems to be unneeded. Additional note: a "./" prefix needs * to be added when the path is not absolute to avoid ambiguity * with drive letters. */ size_t stream_path_nchars; size_t path_nchars; size_t stream_name_nchars; const wchar_t *prefix; path_nchars = wcslen(path); stream_name_nchars = wcslen(stream_name_utf16); stream_path_nchars = path_nchars + 1 + stream_name_nchars; if (path[0] != L'/' && path[0] != L'\\') { prefix = L"./"; stream_path_nchars += 2; } else { prefix = L""; } stream_path = alloca((stream_path_nchars + 1) * sizeof(wchar_t)); swprintf(stream_path, stream_path_nchars + 1, L"%ls%ls:%ls", prefix, path, stream_name_utf16); } else { /* Unnamed stream; its path is just the path to the file itself. * */ stream_path = (wchar_t*)path; /* Directories must be created with CreateDirectoryW(). Then * the call to CreateFileW() will merely open the directory that * was already created rather than creating a new file. */ if (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY) { if (!CreateDirectoryW(stream_path, NULL)) { err = GetLastError(); if (err != ERROR_ALREADY_EXISTS) { ERROR("Failed to create directory \"%ls\"", stream_path); win32_error(err); ret = WIMLIB_ERR_MKDIR; goto fail; } } DEBUG("Created directory \"%ls\"", stream_path); if (!(inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT)) { ret = 0; goto out; } creationDisposition = OPEN_EXISTING; } } DEBUG("Opening \"%ls\"", stream_path); h = CreateFileW(stream_path, GENERIC_WRITE | WRITE_OWNER | WRITE_DAC | ACCESS_SYSTEM_SECURITY, 0, NULL, creationDisposition, FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_BACKUP_SEMANTICS | inode->i_attributes, NULL); if (h == INVALID_HANDLE_VALUE) { err = GetLastError(); ERROR("Failed to create \"%ls\"", stream_path); win32_error(err); ret = WIMLIB_ERR_OPEN; goto fail; } if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT && stream_name_utf16 == NULL) { DEBUG("Setting reparse data on \"%ls\"", path); ret = win32_set_reparse_data(h, inode->i_reparse_tag, lte, path); if (ret) goto fail_close_handle; } else { if (lte) { DEBUG("Extracting \"%ls\" (len = %"PRIu64")", stream_path, wim_resource_size(lte)); ret = do_win32_extract_stream(h, lte); if (ret) goto fail_close_handle; } } DEBUG("Closing \"%ls\"", stream_path); if (!CloseHandle(h)) { err = GetLastError(); ERROR("Failed to close \"%ls\"", stream_path); win32_error(err); ret = WIMLIB_ERR_WRITE; goto fail; } ret = 0; goto out; fail_close_handle: CloseHandle(h); fail: ERROR("Error extracting %ls", stream_path); out: return ret; } /* * Creates a file, directory, or reparse point and extracts all streams to it * (unnamed data stream and/or reparse point stream, plus any alternate data * streams). This in Win32-specific code. * * @inode: WIM inode for this file or directory. * @path: UTF-16LE external path to extract the inode to. * * Returns 0 on success; nonzero on failure. */ static int win32_extract_streams(const struct wim_inode *inode, const wchar_t *path, u64 *completed_bytes_p) { struct wim_lookup_table_entry *unnamed_lte; int ret; unnamed_lte = inode_unnamed_lte_resolved(inode); ret = win32_extract_stream(inode, path, NULL, unnamed_lte); if (ret) goto out; if (unnamed_lte) *completed_bytes_p += wim_resource_size(unnamed_lte); for (u16 i = 0; i < inode->i_num_ads; i++) { const struct wim_ads_entry *ads_entry = &inode->i_ads_entries[i]; if (ads_entry->stream_name_nbytes != 0) { /* Skip special UNIX data entries (see documentation for * WIMLIB_ADD_IMAGE_FLAG_UNIX_DATA) */ if (ads_entry->stream_name_nbytes == WIMLIB_UNIX_DATA_TAG_UTF16LE_NBYTES && !memcmp(ads_entry->stream_name, WIMLIB_UNIX_DATA_TAG_UTF16LE, WIMLIB_UNIX_DATA_TAG_UTF16LE_NBYTES)) continue; ret = win32_extract_stream(inode, path, ads_entry->stream_name, ads_entry->lte); if (ret) break; if (ads_entry->lte) *completed_bytes_p += wim_resource_size(ads_entry->lte); } } out: return ret; } /* * Sets the security descriptor on an extracted file. This is Win32-specific * code. * * @inode: The WIM inode that was extracted and has a security descriptor. * @path: UTF-16LE external path that the inode was extracted to. * @sd: Security data for the WIM image. * * Returns 0 on success; nonzero on failure. */ static int win32_set_security_data(const struct wim_inode *inode, const wchar_t *path, const struct wim_security_data *sd) { SECURITY_INFORMATION securityInformation = DACL_SECURITY_INFORMATION | SACL_SECURITY_INFORMATION | OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION; if (!SetFileSecurityW(path, securityInformation, (PSECURITY_DESCRIPTOR)sd->descriptors[inode->i_security_id])) { DWORD err = GetLastError(); ERROR("Can't set security descriptor on \"%ls\"", path); win32_error(err); return WIMLIB_ERR_WRITE; } return 0; } /* Extract a file, directory, reparse point, or hard link to an * already-extracted file using the Win32 API */ int win32_do_apply_dentry(const mbchar *output_path, size_t output_path_nbytes, struct wim_dentry *dentry, struct apply_args *args) { wchar_t *utf16le_path; size_t utf16le_path_nbytes; DWORD err; int ret; struct wim_inode *inode = dentry->d_inode; ret = mbs_to_utf16le(output_path, output_path_nbytes, &utf16le_path, &utf16le_path_nbytes); if (ret) return ret; if (inode->i_nlink > 1 && inode->i_extracted_file != NULL) { /* Linked file, with another name already extracted. Create a * hard link. */ DEBUG("Creating hard link \"%ls => %ls\"", utf16le_path, inode->i_extracted_file); if (!CreateHardLinkW(utf16le_path, inode->i_extracted_file, NULL)) { err = GetLastError(); ERROR("Can't create hard link \"%ls => %ls\"", utf16le_path, inode->i_extracted_file); ret = WIMLIB_ERR_LINK; win32_error(err); } } else { /* Create the file, directory, or reparse point, and extract the * data streams. */ ret = win32_extract_streams(inode, utf16le_path, &args->progress.extract.completed_bytes); if (ret) goto out_free_utf16_path; /* Set security descriptor if present */ if (inode->i_security_id != -1) { DEBUG("Setting security descriptor %d on %s", inode->i_security_id, output_path); ret = win32_set_security_data(inode, utf16le_path, wim_const_security_data(args->w)); if (ret) goto out_free_utf16_path; } if (inode->i_nlink > 1) { /* Save extracted path for a later call to * CreateHardLinkW() if this inode has multiple links. * */ inode->i_extracted_file = utf16le_path; goto out; } } out_free_utf16_path: FREE(utf16le_path); out: return ret; } /* Set timestamps on an extracted file using the Win32 API */ int win32_do_apply_dentry_timestamps(const mbchar *output_path, size_t output_path_nbytes, const struct wim_dentry *dentry, const struct apply_args *args) { /* Win32 */ wchar_t *utf16le_path; size_t utf16le_path_nbytes; DWORD err; HANDLE h; int ret; const struct wim_inode *inode = dentry->d_inode; ret = mbs_to_utf16le(output_path, output_path_nbytes, &utf16le_path, &utf16le_path_nbytes); if (ret) return ret; DEBUG("Opening \"%s\" to set timestamps", output_path); h = CreateFileW(utf16le_path, GENERIC_WRITE | WRITE_OWNER | WRITE_DAC | ACCESS_SYSTEM_SECURITY, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OPEN_REPARSE_POINT, NULL); if (h == INVALID_HANDLE_VALUE) err = GetLastError(); FREE(utf16le_path); if (h == INVALID_HANDLE_VALUE) goto fail; FILETIME creationTime = {.dwLowDateTime = inode->i_creation_time & 0xffffffff, .dwHighDateTime = inode->i_creation_time >> 32}; FILETIME lastAccessTime = {.dwLowDateTime = inode->i_last_access_time & 0xffffffff, .dwHighDateTime = inode->i_last_access_time >> 32}; FILETIME lastWriteTime = {.dwLowDateTime = inode->i_last_write_time & 0xffffffff, .dwHighDateTime = inode->i_last_write_time >> 32}; DEBUG("Calling SetFileTime() on \"%s\"", output_path); if (!SetFileTime(h, &creationTime, &lastAccessTime, &lastWriteTime)) { err = GetLastError(); CloseHandle(h); goto fail; } DEBUG("Closing \"%s\"", output_path); if (!CloseHandle(h)) { err = GetLastError(); goto fail; } goto out; fail: /* Only warn if setting timestamps failed. */ WARNING("Can't set timestamps on \"%s\"", output_path); win32_error(err); out: return 0; } /* Replacement for POSIX fsync() */ int fsync(int fd) { HANDLE h = (HANDLE)_get_osfhandle(fd); if (h == INVALID_HANDLE_VALUE) { ERROR("Could not get Windows handle for file descriptor"); win32_error(GetLastError()); errno = EBADF; return -1; } if (!FlushFileBuffers(h)) { ERROR("Could not flush file buffers to disk"); win32_error(GetLastError()); errno = EIO; return -1; } return 0; } /* Use the Win32 API to get the number of processors */ unsigned win32_get_number_of_processors() { SYSTEM_INFO sysinfo; GetSystemInfo(&sysinfo); return sysinfo.dwNumberOfProcessors; } /* Replacement for POSIX-2008 realpath(). Warning: partial functionality only * (resolved_path must be NULL). Also I highly doubt that GetFullPathName * really does the right thing under all circumstances. */ mbchar * realpath(const mbchar *path, mbchar *resolved_path) { DWORD ret; wimlib_assert(resolved_path == NULL); ret = GetFullPathNameA(path, 0, NULL, NULL); if (!ret) goto fail_win32; resolved_path = MALLOC(ret + 1); if (!resolved_path) goto fail; ret = GetFullPathNameA(path, ret, resolved_path, NULL); if (!ret) { free(resolved_path); goto fail_win32; } return resolved_path; fail_win32: win32_error(GetLastError()); fail: return NULL; } char * nl_langinfo(nl_item item) { wimlib_assert(item == CODESET); static char buf[64]; strcpy(buf, "Unknown"); return buf; }