-#include "config.h"
+/*
+ * 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/.
+ */
-#if defined(__CYGWIN__) || defined(__WIN32__)
+#ifdef __WIN32__
+
+#include "config.h"
#include <windows.h>
-# ifdef ERROR
-# undef ERROR
-# endif
+#include <ntdef.h>
+#include <wchar.h>
+#include <shlwapi.h> /* for PathMatchSpecW() */
+#include <aclapi.h> /* for SetSecurityInfo() */
+#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 "buffer_io.h"
+#include <pthread.h>
-#include "wimlib_internal.h"
+#include <errno.h>
+#define MAX_GET_SD_ACCESS_DENIED_WARNINGS 1
+#define MAX_GET_SACL_PRIV_NOTHELD_WARNINGS 1
+#define MAX_CREATE_HARD_LINK_WARNINGS 5
+struct win32_capture_state {
+ unsigned long num_get_sd_access_denied;
+ unsigned long num_get_sacl_priv_notheld;
+};
+
+#define MAX_SET_SD_ACCESS_DENIED_WARNINGS 1
+#define MAX_SET_SACL_PRIV_NOTHELD_WARNINGS 1
#ifdef ENABLE_ERROR_MESSAGES
-void win32_error(u32 err_code)
+static void
+win32_error(u32 err_code)
{
- char *buffer;
+ wchar_t *buffer;
DWORD nchars;
- nchars = FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER,
+ nchars = FormatMessageW(FORMAT_MESSAGE_FROM_SYSTEM |
+ FORMAT_MESSAGE_ALLOCATE_BUFFER,
NULL, err_code, 0,
- (char*)&buffer, 0, NULL);
+ (wchar_t*)&buffer, 0, NULL);
if (nchars == 0) {
ERROR("Error printing error message! "
"Computer will self-destruct in 3 seconds.");
} else {
- ERROR("Win32 error: %s", buffer);
+ ERROR("Win32 error: %ls", buffer);
LocalFree(buffer);
}
}
-#else
-#define win32_error(err_code)
-#endif
+#else /* ENABLE_ERROR_MESSAGES */
+# define win32_error(err_code)
+#endif /* !ENABLE_ERROR_MESSAGES */
+
+/* Pointers to functions that are not available on all targetted versions of
+ * Windows (XP and later). NOTE: The WINAPI annotations seem to be important; I
+ * assume it specifies a certain calling convention. */
+
+/* Vista and later */
+static HANDLE (WINAPI *win32func_FindFirstStreamW)(LPCWSTR lpFileName,
+ STREAM_INFO_LEVELS InfoLevel,
+ LPVOID lpFindStreamData,
+ DWORD dwFlags) = NULL;
+
+/* Vista and later */
+static BOOL (WINAPI *win32func_FindNextStreamW)(HANDLE hFindStream,
+ LPVOID lpFindStreamData) = NULL;
+
+static HMODULE hKernel32 = NULL;
+
+/* Try to dynamically load some functions */
+void
+win32_global_init()
+{
+ DWORD err;
+
+ if (hKernel32 == NULL) {
+ DEBUG("Loading Kernel32.dll");
+ hKernel32 = LoadLibraryW(L"Kernel32.dll");
+ if (hKernel32 == NULL) {
+ err = GetLastError();
+ WARNING("Can't load Kernel32.dll");
+ win32_error(err);
+ return;
+ }
+ }
+
+ DEBUG("Looking for FindFirstStreamW");
+ win32func_FindFirstStreamW = (void*)GetProcAddress(hKernel32, "FindFirstStreamW");
+ if (!win32func_FindFirstStreamW) {
+ WARNING("Could not find function FindFirstStreamW() in Kernel32.dll!");
+ WARNING("Capturing alternate data streams will not be supported.");
+ return;
+ }
+
+ DEBUG("Looking for FindNextStreamW");
+ win32func_FindNextStreamW = (void*)GetProcAddress(hKernel32, "FindNextStreamW");
+ if (!win32func_FindNextStreamW) {
+ WARNING("Could not find function FindNextStreamW() in Kernel32.dll!");
+ WARNING("Capturing alternate data streams will not be supported.");
+ win32func_FindFirstStreamW = NULL;
+ }
+}
+
+void
+win32_global_cleanup()
+{
+ if (hKernel32 != NULL) {
+ DEBUG("Closing Kernel32.dll");
+ FreeLibrary(hKernel32);
+ hKernel32 = NULL;
+ }
+}
+
+static const wchar_t *capture_access_denied_msg =
+L" If you are not running this program as the administrator, you may\n"
+ " need to do so, so that all data and metadata can be backed up.\n"
+ " Otherwise, there may be no way to access the desired data or\n"
+ " metadata without taking ownership of the file or directory.\n"
+ ;
+
+static const wchar_t *apply_access_denied_msg =
+L"If you are not running this program as the administrator, you may\n"
+ " need to do so, so that all data and metadata can be extracted\n"
+ " exactly as the origignal copy. However, if you do not care that\n"
+ " the security descriptors are extracted correctly, you could run\n"
+ " `wimlib-imagex apply' with the --no-acls flag instead.\n"
+ ;
-void *win32_open_file_readonly(const void *path)
+static HANDLE
+win32_open_existing_file(const wchar_t *path, DWORD dwDesiredAccess)
{
- return CreateFileW((const wchar_t*)path,
- FILE_READ_DATA |
- FILE_READ_ATTRIBUTES |
- READ_CONTROL |
- ACCESS_SYSTEM_SECURITY,
+ return CreateFileW(path,
+ dwDesiredAccess,
FILE_SHARE_READ,
NULL, /* lpSecurityAttributes */
OPEN_EXISTING,
NULL /* hTemplateFile */);
}
-int win32_read_file(const char *filename,
- void *handle, u64 offset, size_t size, u8 *buf)
+HANDLE
+win32_open_file_data_only(const wchar_t *path)
+{
+ return win32_open_existing_file(path, FILE_READ_DATA);
+}
+
+int
+read_win32_file_prefix(const struct wim_lookup_table_entry *lte,
+ u64 size,
+ consume_data_callback_t cb,
+ void *ctx_or_buf,
+ int _ignored_flags)
+{
+ int ret = 0;
+ void *out_buf;
+ DWORD err;
+ u64 bytes_remaining;
+
+ HANDLE hFile = win32_open_file_data_only(lte->file_on_disk);
+ if (hFile == INVALID_HANDLE_VALUE) {
+ err = GetLastError();
+ ERROR("Failed to open \"%ls\"", lte->file_on_disk);
+ win32_error(err);
+ return WIMLIB_ERR_OPEN;
+ }
+
+ if (cb)
+ out_buf = alloca(WIM_CHUNK_SIZE);
+ else
+ out_buf = ctx_or_buf;
+
+ bytes_remaining = size;
+ while (bytes_remaining) {
+ DWORD bytesToRead, bytesRead;
+
+ bytesToRead = min(WIM_CHUNK_SIZE, bytes_remaining);
+ if (!ReadFile(hFile, out_buf, bytesToRead, &bytesRead, NULL) ||
+ bytesRead != bytesToRead)
+ {
+ err = GetLastError();
+ ERROR("Failed to read data from \"%ls\"", lte->file_on_disk);
+ win32_error(err);
+ ret = WIMLIB_ERR_READ;
+ break;
+ }
+ bytes_remaining -= bytesRead;
+ if (cb) {
+ ret = (*cb)(out_buf, bytesRead, ctx_or_buf);
+ if (ret)
+ break;
+ } else {
+ out_buf += bytesRead;
+ }
+ }
+ CloseHandle(hFile);
+ return ret;
+}
+
+struct win32_encrypted_read_ctx {
+ consume_data_callback_t read_prefix_cb;
+ void *read_prefix_ctx_or_buf;
+ int wimlib_err_code;
+ void *buf;
+ size_t buf_filled;
+ u64 bytes_remaining;
+};
+
+static DWORD WINAPI
+win32_encrypted_export_cb(unsigned char *_data, void *_ctx, unsigned long len)
+{
+ const void *data = _data;
+ struct win32_encrypted_read_ctx *ctx = _ctx;
+ int ret;
+
+ DEBUG("len = %lu", len);
+ if (ctx->read_prefix_cb) {
+ /* The length of the buffer passed to the ReadEncryptedFileRaw()
+ * export callback is undocumented, so we assume it may be of
+ * arbitrary size. */
+ size_t bytes_to_buffer = min(ctx->bytes_remaining - ctx->buf_filled,
+ len);
+ while (bytes_to_buffer) {
+ size_t bytes_to_copy_to_buf =
+ min(bytes_to_buffer, WIM_CHUNK_SIZE - ctx->buf_filled);
+
+ memcpy(ctx->buf + ctx->buf_filled, data,
+ bytes_to_copy_to_buf);
+ ctx->buf_filled += bytes_to_copy_to_buf;
+ data += bytes_to_copy_to_buf;
+ bytes_to_buffer -= bytes_to_copy_to_buf;
+
+ if (ctx->buf_filled == WIM_CHUNK_SIZE ||
+ ctx->buf_filled == ctx->bytes_remaining)
+ {
+ ret = (*ctx->read_prefix_cb)(ctx->buf,
+ ctx->buf_filled,
+ ctx->read_prefix_ctx_or_buf);
+ if (ret) {
+ ctx->wimlib_err_code = ret;
+ /* Shouldn't matter what error code is returned
+ * here, as long as it isn't ERROR_SUCCESS. */
+ return ERROR_READ_FAULT;
+ }
+ ctx->bytes_remaining -= ctx->buf_filled;
+ ctx->buf_filled = 0;
+ }
+ }
+ } else {
+ size_t len_to_copy = min(len, ctx->bytes_remaining);
+ memcpy(ctx->read_prefix_ctx_or_buf, data, len_to_copy);
+ ctx->bytes_remaining -= len_to_copy;
+ ctx->read_prefix_ctx_or_buf += len_to_copy;
+ }
+ return ERROR_SUCCESS;
+}
+
+int
+read_win32_encrypted_file_prefix(const struct wim_lookup_table_entry *lte,
+ u64 size,
+ consume_data_callback_t cb,
+ void *ctx_or_buf,
+ int _ignored_flags)
+{
+ struct win32_encrypted_read_ctx export_ctx;
+ DWORD err;
+ void *file_ctx;
+ int ret;
+
+ DEBUG("Reading %"PRIu64" bytes from encryted file \"%ls\"",
+ size, lte->file_on_disk);
+
+ export_ctx.read_prefix_cb = cb;
+ export_ctx.read_prefix_ctx_or_buf = ctx_or_buf;
+ export_ctx.wimlib_err_code = 0;
+ if (cb) {
+ export_ctx.buf = MALLOC(WIM_CHUNK_SIZE);
+ if (!export_ctx.buf)
+ return WIMLIB_ERR_NOMEM;
+ } else {
+ export_ctx.buf = NULL;
+ }
+ export_ctx.buf_filled = 0;
+ export_ctx.bytes_remaining = size;
+
+ err = OpenEncryptedFileRawW(lte->file_on_disk, 0, &file_ctx);
+ if (err != ERROR_SUCCESS) {
+ ERROR("Failed to open encrypted file \"%ls\" for raw read",
+ lte->file_on_disk);
+ win32_error(err);
+ ret = WIMLIB_ERR_OPEN;
+ goto out_free_buf;
+ }
+ err = ReadEncryptedFileRaw(win32_encrypted_export_cb,
+ &export_ctx, file_ctx);
+ if (err != ERROR_SUCCESS) {
+ ERROR("Failed to read encrypted file \"%ls\"",
+ lte->file_on_disk);
+ win32_error(err);
+ ret = export_ctx.wimlib_err_code;
+ if (ret == 0)
+ ret = WIMLIB_ERR_READ;
+ } else if (export_ctx.bytes_remaining != 0) {
+ ERROR("Only could read %"PRIu64" of %"PRIu64" bytes from "
+ "encryted file \"%ls\"",
+ size - export_ctx.bytes_remaining, size,
+ lte->file_on_disk);
+ ret = WIMLIB_ERR_READ;
+ } else {
+ ret = 0;
+ }
+ CloseEncryptedFileRaw(file_ctx);
+out_free_buf:
+ FREE(export_ctx.buf);
+ return ret;
+}
+
+/* Given a path, which may not yet exist, get a set of flags that describe the
+ * features of the volume the path is on. */
+static int
+win32_get_vol_flags(const wchar_t *path, unsigned *vol_flags_ret)
+{
+ wchar_t *volume;
+ BOOL bret;
+ DWORD vol_flags;
+
+ if (path[0] != L'\0' && path[0] != L'\\' &&
+ path[0] != L'/' && path[1] == L':')
+ {
+ /* Path starts with a drive letter; use it. */
+ volume = alloca(4 * sizeof(wchar_t));
+ volume[0] = path[0];
+ volume[1] = path[1];
+ volume[2] = L'\\';
+ volume[3] = L'\0';
+ } else {
+ /* Path does not start with a drive letter; use the volume of
+ * the current working directory. */
+ volume = NULL;
+ }
+ bret = GetVolumeInformationW(volume, /* lpRootPathName */
+ NULL, /* lpVolumeNameBuffer */
+ 0, /* nVolumeNameSize */
+ NULL, /* lpVolumeSerialNumber */
+ NULL, /* lpMaximumComponentLength */
+ &vol_flags, /* lpFileSystemFlags */
+ NULL, /* lpFileSystemNameBuffer */
+ 0); /* nFileSystemNameSize */
+ if (!bret) {
+ DWORD err = GetLastError();
+ WARNING("Failed to get volume information for path \"%ls\"", path);
+ win32_error(err);
+ vol_flags = 0xffffffff;
+ }
+
+ DEBUG("using vol_flags = %x", vol_flags);
+ *vol_flags_ret = vol_flags;
+ return 0;
+}
+
+
+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)
+{
+ WIN32_FIND_DATAW dat;
+ HANDLE hFind;
+ int ret = 0;
+
+ /* If we can't read the short filename for some reason, we just ignore
+ * the error and assume the file has no short name. I don't think this
+ * should be an issue, since the short names are essentially obsolete
+ * anyway. */
+ hFind = FindFirstFileW(path, &dat);
+ if (hFind != INVALID_HANDLE_VALUE) {
+ if (dat.cAlternateFileName[0] != L'\0') {
+ DEBUG("\"%ls\": short name \"%ls\"", path, dat.cAlternateFileName);
+ size_t short_name_nbytes = wcslen(dat.cAlternateFileName) *
+ sizeof(wchar_t);
+ size_t n = short_name_nbytes + sizeof(wchar_t);
+ dentry->short_name = MALLOC(n);
+ if (dentry->short_name) {
+ memcpy(dentry->short_name, dat.cAlternateFileName, n);
+ dentry->short_name_nbytes = short_name_nbytes;
+ } else {
+ ret = WIMLIB_ERR_NOMEM;
+ }
+ }
+ FindClose(hFind);
+ }
+ return ret;
+}
+
+static int
+win32_get_security_descriptor(struct wim_dentry *dentry,
+ struct sd_set *sd_set,
+ const wchar_t *path,
+ struct win32_capture_state *state,
+ int add_image_flags)
+{
+ SECURITY_INFORMATION requestedInformation;
+ DWORD lenNeeded = 0;
+ BOOL status;
+ DWORD err;
+ unsigned long n;
+
+ requestedInformation = DACL_SECURITY_INFORMATION |
+ SACL_SECURITY_INFORMATION |
+ OWNER_SECURITY_INFORMATION |
+ GROUP_SECURITY_INFORMATION;
+again:
+ /* Request length of security descriptor */
+ status = GetFileSecurityW(path, requestedInformation,
+ NULL, 0, &lenNeeded);
+ err = GetLastError();
+ if (!status && err == ERROR_INSUFFICIENT_BUFFER) {
+ DWORD len = lenNeeded;
+ char buf[len];
+ if (GetFileSecurityW(path, 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();
+ }
+ }
+
+ if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_STRICT_ACLS)
+ goto fail;
+
+ switch (err) {
+ case ERROR_PRIVILEGE_NOT_HELD:
+ if (requestedInformation & SACL_SECURITY_INFORMATION) {
+ n = state->num_get_sacl_priv_notheld++;
+ requestedInformation &= ~SACL_SECURITY_INFORMATION;
+ if (n < MAX_GET_SACL_PRIV_NOTHELD_WARNINGS) {
+ WARNING(
+"We don't have enough privileges to read the full security\n"
+" descriptor of \"%ls\"!\n"
+" Re-trying with SACL omitted.\n", path);
+ } else if (n == MAX_GET_SACL_PRIV_NOTHELD_WARNINGS) {
+ WARNING(
+"Suppressing further privileges not held error messages when reading\n"
+" security descriptors.");
+ }
+ goto again;
+ }
+ /* Fall through */
+ case ERROR_ACCESS_DENIED:
+ n = state->num_get_sd_access_denied++;
+ if (n < MAX_GET_SD_ACCESS_DENIED_WARNINGS) {
+ WARNING("Failed to read security descriptor of \"%ls\": "
+ "Access denied!\n%ls", path, capture_access_denied_msg);
+ } else if (n == MAX_GET_SD_ACCESS_DENIED_WARNINGS) {
+ WARNING("Suppressing further access denied errors messages i"
+ "when reading security descriptors");
+ }
+ return 0;
+ default:
+fail:
+ ERROR("Failed to read security descriptor of \"%ls\"", path);
+ win32_error(err);
+ return WIMLIB_ERR_READ;
+ }
+}
+
+static int
+win32_build_dentry_tree_recursive(struct wim_dentry **root_ret,
+ wchar_t *path,
+ size_t path_num_chars,
+ struct add_image_params *params,
+ struct win32_capture_state *state,
+ unsigned vol_flags);
+
+/* 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,
+ wchar_t *dir_path,
+ size_t dir_path_num_chars,
+ struct add_image_params *params,
+ struct win32_capture_state *state,
+ unsigned vol_flags)
{
- HANDLE h = handle;
+ WIN32_FIND_DATAW dat;
+ HANDLE hFind;
DWORD err;
- DWORD bytesRead;
- LARGE_INTEGER liOffset = {.QuadPart = offset};
+ int ret;
- wimlib_assert(size <= 0xffffffff);
+ DEBUG("Recurse to directory \"%ls\"", dir_path);
- if (SetFilePointerEx(h, liOffset, NULL, FILE_BEGIN))
- if (ReadFile(h, buf, size, &bytesRead, NULL) && bytesRead == size)
+ /* 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. */
+ dir_path[dir_path_num_chars] = L'/';
+ dir_path[dir_path_num_chars + 1] = L'*';
+ dir_path[dir_path_num_chars + 2] = L'\0';
+ hFind = FindFirstFileW(dir_path, &dat);
+ dir_path[dir_path_num_chars] = L'\0';
+
+ if (hFind == INVALID_HANDLE_VALUE) {
+ err = GetLastError();
+ if (err == ERROR_FILE_NOT_FOUND) {
return 0;
+ } else {
+ ERROR("Failed to read directory \"%ls\"", dir_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')))
+ continue;
+ size_t filename_len = wcslen(dat.cFileName);
+
+ dir_path[dir_path_num_chars] = L'/';
+ wmemcpy(dir_path + dir_path_num_chars + 1,
+ dat.cFileName,
+ filename_len + 1);
+
+ struct wim_dentry *child;
+ size_t path_len = dir_path_num_chars + 1 + filename_len;
+ ret = win32_build_dentry_tree_recursive(&child,
+ dir_path,
+ path_len,
+ params,
+ state,
+ vol_flags);
+ dir_path[dir_path_num_chars] = L'\0';
+ if (ret)
+ goto out_find_close;
+ if (child)
+ dentry_add_child(root, child);
+ } while (FindNextFileW(hFind, &dat));
err = GetLastError();
- ERROR("Error reading \"%s\"", filename);
- win32_error(err);
- return WIMLIB_ERR_READ;
+ if (err != ERROR_NO_MORE_FILES) {
+ ERROR("Failed to read directory \"%ls\"", dir_path);
+ win32_error(err);
+ if (ret == 0)
+ ret = WIMLIB_ERR_READ;
+ }
+out_find_close:
+ FindClose(hFind);
+ return ret;
+}
+
+int
+win32_get_file_and_vol_ids(const wchar_t *path, u64 *ino_ret, u64 *dev_ret)
+{
+ HANDLE hFile;
+ DWORD err;
+ BY_HANDLE_FILE_INFORMATION file_info;
+ int ret;
+
+ hFile = win32_open_existing_file(path, FILE_READ_ATTRIBUTES);
+ if (hFile == INVALID_HANDLE_VALUE) {
+ err = GetLastError();
+ WARNING("Failed to open \"%ls\" to get file and volume IDs",
+ path);
+ win32_error(err);
+ return WIMLIB_ERR_OPEN;
+ }
+
+ if (!GetFileInformationByHandle(hFile, &file_info)) {
+ err = GetLastError();
+ ERROR("Failed to get file information for \"%ls\"", path);
+ win32_error(err);
+ ret = WIMLIB_ERR_STAT;
+ } else {
+ *ino_ret = ((u64)file_info.nFileIndexHigh << 32) |
+ (u64)file_info.nFileIndexLow;
+ *dev_ret = file_info.dwVolumeSerialNumber;
+ ret = 0;
+ }
+ CloseHandle(hFile);
+ return ret;
+}
+
+/* Reparse point fixup status code */
+enum rp_status {
+ /* Reparse point corresponded to an absolute symbolic link or junction
+ * point that pointed outside the directory tree being captured, and
+ * therefore was excluded. */
+ RP_EXCLUDED = 0x0,
+
+ /* Reparse point was not fixed as it was either a relative symbolic
+ * link, a mount point, or something else we could not understand. */
+ RP_NOT_FIXED = 0x1,
+
+ /* Reparse point corresponded to an absolute symbolic link or junction
+ * point that pointed inside the directory tree being captured, where
+ * the target was specified by a "full" \??\ prefixed path, and
+ * therefore was fixed to be relative to the root of the directory tree
+ * being captured. */
+ RP_FIXED_FULLPATH = 0x2,
+
+ /* Same as RP_FIXED_FULLPATH, except the absolute link target did not
+ * have the \??\ prefix. It may have begun with a drive letter though.
+ * */
+ RP_FIXED_ABSPATH = 0x4,
+
+ /* Either RP_FIXED_FULLPATH or RP_FIXED_ABSPATH. */
+ RP_FIXED = RP_FIXED_FULLPATH | RP_FIXED_ABSPATH,
+};
+
+/* Given the "substitute name" target of a Windows reparse point, try doing a
+ * fixup where we change it to be absolute relative to the root of the directory
+ * tree being captured.
+ *
+ * Note that this is only executed when WIMLIB_ADD_IMAGE_FLAG_RPFIX has been
+ * set.
+ *
+ * @capture_root_ino and @capture_root_dev indicate the inode number and device
+ * of the root of the directory tree being captured. They are meant to identify
+ * this directory (as an alternative to its actual path, which could potentially
+ * be reached via multiple destinations due to other symbolic links). This may
+ * not work properly on FAT, which doesn't seem to supply proper inode numbers
+ * or file IDs. However, FAT doesn't support reparse points so this function
+ * wouldn't even be called anyway. */
+static enum rp_status
+win32_maybe_rpfix_target(wchar_t *target, size_t *target_nchars_p,
+ u64 capture_root_ino, u64 capture_root_dev)
+{
+ size_t target_nchars= *target_nchars_p;
+ size_t stripped_chars;
+ wchar_t *orig_target;
+
+ if (target_nchars == 0)
+ /* Invalid reparse point (empty target) */
+ return RP_NOT_FIXED;
+
+ if (target[0] == L'\\') {
+ if (target_nchars >= 2 && target[1] == L'\\') {
+ /* Probably a volume. Can't do anything with it. */
+ DEBUG("Not fixing target (probably a volume)");
+ return RP_NOT_FIXED;
+ } else if (target_nchars >= 7 &&
+ target[1] == '?' &&
+ target[2] == '?' &&
+ target[3] == '\\' &&
+ target[4] != '\0' &&
+ target[5] == ':' &&
+ target[6] == '\\')
+ {
+ DEBUG("Full style path");
+ /* Full \??\x:\ style path (may be junction or symlink)
+ * */
+ stripped_chars = 6;
+ } else {
+ DEBUG("Absolute target without drive letter");
+ /* Absolute target, without drive letter */
+ stripped_chars = 0;
+ }
+ } else if (target_nchars >= 3 &&
+ target[0] != L'\0' &&
+ target[1] == L':' &&
+ target[2] == L'\\')
+ {
+ DEBUG("Absolute target with drive letter");
+ /* Absolute target, with drive letter */
+ stripped_chars = 2;
+ } else {
+ DEBUG("Relative symlink or other link");
+ /* Relative symlink or other unexpected format */
+ return RP_NOT_FIXED;
+ }
+ target[target_nchars] = L'\0';
+ orig_target = target;
+ target = fixup_symlink(target + stripped_chars, capture_root_ino, capture_root_dev);
+ if (!target)
+ return RP_EXCLUDED;
+ target_nchars = wcslen(target);
+ wmemmove(orig_target + stripped_chars, target, target_nchars + 1);
+ *target_nchars_p = target_nchars + stripped_chars;
+ DEBUG("Fixed reparse point (new target: \"%ls\")", orig_target);
+ if (stripped_chars == 6)
+ return RP_FIXED_FULLPATH;
+ else
+ return RP_FIXED_ABSPATH;
}
-void win32_close_file(void *handle)
+static enum rp_status
+win32_try_capture_rpfix(char *rpbuf, DWORD *rpbuflen_p,
+ u64 capture_root_ino, u64 capture_root_dev)
{
- CloseHandle((HANDLE)handle);
+ const char *p_get;
+ char *p_put;
+ u16 substitute_name_offset;
+ u16 substitute_name_len;
+ wchar_t *target;
+ size_t target_nchars;
+ enum rp_status status;
+ u32 rptag;
+ DWORD rpbuflen = *rpbuflen_p;
+
+ if (rpbuflen < 16) /* Invalid reparse point (length too small) */
+ return RP_NOT_FIXED;
+ p_get = get_u32(rpbuf, &rptag);
+ p_get += 4;
+ p_get = get_u16(p_get, &substitute_name_offset);
+ p_get = get_u16(p_get, &substitute_name_len);
+ p_get += 4;
+ if (rptag == WIM_IO_REPARSE_TAG_SYMLINK) {
+ if (rpbuflen < 20) /* Invalid reparse point (length too small) */
+ return RP_NOT_FIXED;
+ p_get += 4;
+ }
+ if ((DWORD)substitute_name_offset +
+ substitute_name_len + (p_get - rpbuf) > rpbuflen)
+ /* Invalid reparse point (length too small) */
+ return RP_NOT_FIXED;
+
+ target = (wchar_t*)&p_get[substitute_name_offset];
+ target_nchars = substitute_name_len / 2;
+ /* Note: target is not necessarily null-terminated */
+
+ status = win32_maybe_rpfix_target(target, &target_nchars,
+ capture_root_ino, capture_root_dev);
+ if (status & RP_FIXED) {
+ size_t target_nbytes = target_nchars * 2;
+ size_t print_nbytes = target_nbytes;
+ wchar_t target_copy[target_nchars];
+ wchar_t *print_name = target_copy;
+
+ if (status == RP_FIXED_FULLPATH) {
+ /* "full path", meaning \??\ prefixed. We should not
+ * include this prefix in the print name, as it is
+ * apparently meant for the filesystem driver only. */
+ print_nbytes -= 8;
+ print_name += 4;
+ }
+ wmemcpy(target_copy, target, target_nchars);
+ p_put = rpbuf + 8;
+ p_put = put_u16(p_put, 0); /* Substitute name offset */
+ p_put = put_u16(p_put, target_nbytes); /* Substitute name length */
+ p_put = put_u16(p_put, target_nbytes + 2); /* Print name offset */
+ p_put = put_u16(p_put, print_nbytes); /* Print name length */
+ if (rptag == WIM_IO_REPARSE_TAG_SYMLINK)
+ p_put = put_u32(p_put, 1);
+ p_put = put_bytes(p_put, target_nbytes, target_copy);
+ p_put = put_u16(p_put, 0);
+ p_put = put_bytes(p_put, print_nbytes, print_name);
+ p_put = put_u16(p_put, 0);
+
+ /* Wrote the end of the reparse data. Recalculate the length,
+ * set the length field correctly, and return it. */
+ rpbuflen = p_put - rpbuf;
+ put_u16(rpbuf + 4, rpbuflen - 8);
+ *rpbuflen_p = rpbuflen;
+ }
+ return status;
}
-static bool win32_modify_privilege(const char *privilege, bool enable)
+static int
+win32_get_reparse_data(HANDLE hFile, const wchar_t *path,
+ struct add_image_params *params,
+ void *reparse_data, size_t *reparse_data_len_ret)
{
- HANDLE hToken;
- LUID luid;
- TOKEN_PRIVILEGES newState;
- bool ret = false;
+ DWORD bytesReturned;
+ u32 reparse_tag;
+ enum rp_status status;
- DEBUG("%s privilege %s",
- enable ? "Enabling" : "Disabling", privilege);
+ DEBUG("Loading reparse data from \"%ls\"", path);
+ if (!DeviceIoControl(hFile, FSCTL_GET_REPARSE_POINT,
+ NULL, /* "Not used with this operation; set to NULL" */
+ 0, /* "Not used with this operation; set to 0" */
+ reparse_data, /* "A pointer to a buffer that
+ receives the reparse point data */
+ REPARSE_POINT_MAX_SIZE, /* "The size of the output
+ buffer, in bytes */
+ &bytesReturned,
+ NULL))
+ {
+ DWORD err = GetLastError();
+ ERROR("Failed to get reparse data of \"%ls\"", path);
+ win32_error(err);
+ return -WIMLIB_ERR_READ;
+ }
+ if (bytesReturned < 8) {
+ ERROR("Reparse data on \"%ls\" is invalid", path);
+ return -WIMLIB_ERR_READ;
+ }
- if (!OpenProcessToken(GetCurrentProcess(),
- TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY,
- &hToken))
+ reparse_tag = le32_to_cpu(*(u32*)reparse_data);
+ if (params->add_image_flags & WIMLIB_ADD_IMAGE_FLAG_RPFIX &&
+ (reparse_tag == WIM_IO_REPARSE_TAG_SYMLINK ||
+ reparse_tag == WIM_IO_REPARSE_TAG_MOUNT_POINT))
{
- DEBUG("OpenProcessToken() failed");
+ /* Try doing reparse point fixup */
+ status = win32_try_capture_rpfix(reparse_data,
+ &bytesReturned,
+ params->capture_root_ino,
+ params->capture_root_dev);
+ } else {
+ status = RP_NOT_FIXED;
+ }
+ *reparse_data_len_ret = bytesReturned;
+ return status;
+}
+
+static DWORD WINAPI
+win32_tally_encrypted_size_cb(unsigned char *_data, void *_ctx,
+ unsigned long len)
+{
+ *(u64*)_ctx += len;
+ return ERROR_SUCCESS;
+}
+
+static int
+win32_get_encrypted_file_size(const wchar_t *path, u64 *size_ret)
+{
+ DWORD err;
+ void *file_ctx;
+ int ret;
+
+ *size_ret = 0;
+ err = OpenEncryptedFileRawW(path, 0, &file_ctx);
+ if (err != ERROR_SUCCESS) {
+ ERROR("Failed to open encrypted file \"%ls\" for raw read", path);
+ win32_error(err);
+ return WIMLIB_ERR_OPEN;
+ }
+ err = ReadEncryptedFileRaw(win32_tally_encrypted_size_cb,
+ size_ret, file_ctx);
+ if (err != ERROR_SUCCESS) {
+ ERROR("Failed to read raw encrypted data from \"%ls\"", path);
+ win32_error(err);
+ ret = WIMLIB_ERR_READ;
+ } else {
+ ret = 0;
+ }
+ CloseEncryptedFileRaw(file_ctx);
+ 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: Path to the file (UTF-16LE).
+ *
+ * @path_num_chars: Number of 2-byte characters in @path.
+ *
+ * @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,
+ size_t path_num_chars,
+ struct wim_inode *inode,
+ struct wim_lookup_table *lookup_table,
+ WIN32_FIND_STREAM_DATA *dat)
+{
+ struct wim_ads_entry *ads_entry;
+ struct wim_lookup_table_entry *lte;
+ int ret;
+ wchar_t *stream_name, *colon;
+ size_t stream_name_nchars;
+ bool is_named_stream;
+ wchar_t *spath;
+ size_t spath_nchars;
+ size_t spath_buf_nbytes;
+ const wchar_t *relpath_prefix;
+ const wchar_t *colonchar;
+
+ DEBUG("Capture \"%ls\" stream \"%ls\"", path, dat->cStreamName);
+
+ /* The stream name should be returned as :NAME:TYPE */
+ stream_name = dat->cStreamName;
+ if (*stream_name != L':')
+ goto out_invalid_stream_name;
+ stream_name += 1;
+ colon = wcschr(stream_name, L':');
+ if (colon == NULL)
+ goto out_invalid_stream_name;
+
+ if (wcscmp(colon + 1, L"$DATA")) {
+ /* Not a DATA stream */
+ ret = 0;
goto out;
}
- if (!LookupPrivilegeValue(NULL, privilege, &luid)) {
- DEBUG("LookupPrivilegeValue() failed");
+ *colon = '\0';
+
+ stream_name_nchars = colon - stream_name;
+ is_named_stream = (stream_name_nchars != 0);
+
+ if (is_named_stream) {
+ /* Allocate an ADS entry for the named stream. */
+ ads_entry = inode_add_ads_utf16le(inode, stream_name,
+ stream_name_nchars * sizeof(wchar_t));
+ if (!ads_entry) {
+ ret = WIMLIB_ERR_NOMEM;
+ goto out;
+ }
+ }
+
+ /* If zero length stream, no lookup table entry needed. */
+ if ((u64)dat->StreamSize.QuadPart == 0) {
+ ret = 0;
goto out;
}
- newState.PrivilegeCount = 1;
- newState.Privileges[0].Luid = luid;
- newState.Privileges[0].Attributes = (enable ? SE_PRIVILEGE_ENABLED : 0);
- ret = AdjustTokenPrivileges(hToken, FALSE, &newState, 0, NULL, NULL);
- if (!ret)
- DEBUG("AdjustTokenPrivileges() failed");
- CloseHandle(hToken);
+ /* Create a UTF-16LE 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.
+ *
+ * As yet another special case, relative paths need to be changed to
+ * begin with an explicit "./" so that, for example, a file t:ads, where
+ * :ads is the part we added, is not interpreted as a file on the t:
+ * drive. */
+ spath_nchars = path_num_chars;
+ relpath_prefix = L"";
+ colonchar = L"";
+ if (is_named_stream) {
+ spath_nchars += 1 + stream_name_nchars;
+ colonchar = L":";
+ if (path_num_chars == 1 &&
+ path[0] != L'/' &&
+ path[0] != L'\\')
+ {
+ spath_nchars += 2;
+ relpath_prefix = L"./";
+ }
+ }
+
+ spath_buf_nbytes = (spath_nchars + 1) * sizeof(wchar_t);
+ spath = MALLOC(spath_buf_nbytes);
+
+ swprintf(spath, L"%ls%ls%ls%ls",
+ relpath_prefix, path, colonchar, stream_name);
+
+ /* Make a new wim_lookup_table_entry */
+ lte = new_lookup_table_entry();
+ if (!lte) {
+ ret = WIMLIB_ERR_NOMEM;
+ goto out_free_spath;
+ }
+ lte->file_on_disk = spath;
+ spath = NULL;
+ if (inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED && !is_named_stream) {
+ u64 encrypted_size;
+ lte->resource_location = RESOURCE_WIN32_ENCRYPTED;
+ ret = win32_get_encrypted_file_size(path, &encrypted_size);
+ if (ret)
+ goto out_free_spath;
+ lte->resource_entry.original_size = encrypted_size;
+ } else {
+ lte->resource_location = RESOURCE_WIN32;
+ lte->resource_entry.original_size = (u64)dat->StreamSize.QuadPart;
+ }
+
+ u32 stream_id;
+ if (is_named_stream) {
+ stream_id = ads_entry->stream_id;
+ ads_entry->lte = lte;
+ } else {
+ stream_id = 0;
+ inode->i_lte = lte;
+ }
+ lookup_table_insert_unhashed(lookup_table, lte, inode, stream_id);
+ ret = 0;
+out_free_spath:
+ FREE(spath);
out:
- if (!ret) {
- DWORD err = GetLastError();
+ return ret;
+out_invalid_stream_name:
+ ERROR("Invalid stream name: \"%ls:%ls\"", path, dat->cStreamName);
+ ret = WIMLIB_ERR_READ;
+ goto out;
+}
+
+/* Scans a Win32 file for unnamed and named data streams (not reparse point
+ * streams).
+ *
+ * @path: Path to the file (UTF-16LE).
+ *
+ * @path_num_chars: Number of 2-byte characters in @path.
+ *
+ * @inode: WIM inode to save the stream into.
+ *
+ * @lookup_table: Stream lookup table for the WIM.
+ *
+ * @file_size: Size of unnamed data stream. (Used only if alternate
+ * data streams API appears to be unavailable.)
+ *
+ * @vol_flags: Flags that specify features of the volume being
+ * captured.
+ *
+ * Returns 0 on success; nonzero on failure.
+ */
+static int
+win32_capture_streams(const wchar_t *path,
+ size_t path_num_chars,
+ struct wim_inode *inode,
+ struct wim_lookup_table *lookup_table,
+ u64 file_size,
+ unsigned vol_flags)
+{
+ WIN32_FIND_STREAM_DATA dat;
+ int ret;
+ HANDLE hFind;
+ DWORD err;
+
+ DEBUG("Capturing streams from \"%ls\"", path);
+
+ if (win32func_FindFirstStreamW == NULL ||
+ !(vol_flags & FILE_NAMED_STREAMS))
+ goto unnamed_only;
+
+ hFind = win32func_FindFirstStreamW(path, FindStreamInfoStandard, &dat, 0);
+ if (hFind == INVALID_HANDLE_VALUE) {
+ err = GetLastError();
+ if (err == ERROR_CALL_NOT_IMPLEMENTED)
+ goto unnamed_only;
+
+ /* 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)
+ {
+ DEBUG("ERROR_HANDLE_EOF (ok)");
+ return 0;
+ } else {
+ if (err == ERROR_ACCESS_DENIED) {
+ ERROR("Failed to look up data streams "
+ "of \"%ls\": Access denied!\n%ls",
+ path, capture_access_denied_msg);
+ return WIMLIB_ERR_READ;
+ } else {
+ ERROR("Failed to look up data streams "
+ "of \"%ls\"", path);
+ win32_error(err);
+ return WIMLIB_ERR_READ;
+ }
+ }
+ }
+ do {
+ ret = win32_capture_stream(path,
+ path_num_chars,
+ inode, lookup_table,
+ &dat);
+ if (ret)
+ goto out_find_close;
+ } while (win32func_FindNextStreamW(hFind, &dat));
+ err = GetLastError();
+ if (err != ERROR_HANDLE_EOF) {
+ ERROR("Win32 API: Error reading data streams from \"%ls\"", path);
+ win32_error(err);
+ ret = WIMLIB_ERR_READ;
+ }
+out_find_close:
+ FindClose(hFind);
+ return ret;
+unnamed_only:
+ /* FindFirstStreamW() API is not available, or the volume does not
+ * support named streams. Only capture the unnamed data stream. */
+ DEBUG("Only capturing unnamed data stream");
+ if (inode->i_attributes &
+ (FILE_ATTRIBUTE_REPARSE_POINT | FILE_ATTRIBUTE_DIRECTORY))
+ {
+ ret = 0;
+ } else {
+ /* Just create our own WIN32_FIND_STREAM_DATA for an unnamed
+ * stream to reduce the code to a call to the
+ * already-implemented win32_capture_stream() */
+ wcscpy(dat.cStreamName, L"::$DATA");
+ dat.StreamSize.QuadPart = file_size;
+ ret = win32_capture_stream(path,
+ path_num_chars,
+ inode, lookup_table,
+ &dat);
+ }
+ return ret;
+}
+
+static int
+win32_build_dentry_tree_recursive(struct wim_dentry **root_ret,
+ wchar_t *path,
+ size_t path_num_chars,
+ struct add_image_params *params,
+ struct win32_capture_state *state,
+ unsigned vol_flags)
+{
+ struct wim_dentry *root = NULL;
+ struct wim_inode *inode;
+ DWORD err;
+ u64 file_size;
+ int ret;
+ void *reparse_data;
+ size_t reparse_data_len;
+ u16 not_rpfixed;
+
+ if (exclude_path(path, path_num_chars, params->config, true)) {
+ if (params->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 ((params->add_image_flags & WIMLIB_ADD_IMAGE_FLAG_EXCLUDE_VERBOSE)
+ && params->progress_func)
+ {
+ union wimlib_progress_info info;
+ info.scan.cur_path = path;
+ info.scan.excluded = true;
+ params->progress_func(WIMLIB_PROGRESS_MSG_SCAN_DENTRY, &info);
+ }
+ ret = 0;
+ goto out;
+ }
+
+ if ((params->add_image_flags & WIMLIB_ADD_IMAGE_FLAG_VERBOSE)
+ && params->progress_func)
+ {
+ union wimlib_progress_info info;
+ info.scan.cur_path = path;
+ info.scan.excluded = false;
+ params->progress_func(WIMLIB_PROGRESS_MSG_SCAN_DENTRY, &info);
+ }
+
+ HANDLE hFile = win32_open_existing_file(path,
+ FILE_READ_DATA | FILE_READ_ATTRIBUTES);
+ if (hFile == INVALID_HANDLE_VALUE) {
+ err = GetLastError();
+ ERROR("Win32 API: Failed to open \"%ls\"", path);
+ win32_error(err);
+ ret = WIMLIB_ERR_OPEN;
+ goto out;
+ }
+
+ BY_HANDLE_FILE_INFORMATION file_info;
+ if (!GetFileInformationByHandle(hFile, &file_info)) {
+ err = GetLastError();
+ ERROR("Win32 API: Failed to get file information for \"%ls\"",
+ path);
win32_error(err);
- WARNING("Failed to %s privilege %s",
- enable ? "enable" : "disable", privilege);
- WARNING("The program will continue, but if permission issues are "
- "encountered, you may need to run this program as the administrator");
+ ret = WIMLIB_ERR_STAT;
+ goto out_close_handle;
+ }
+
+ if (file_info.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
+ reparse_data = alloca(REPARSE_POINT_MAX_SIZE);
+ ret = win32_get_reparse_data(hFile, path, params,
+ reparse_data, &reparse_data_len);
+ if (ret < 0) {
+ /* WIMLIB_ERR_* (inverted) */
+ ret = -ret;
+ goto out_close_handle;
+ } else if (ret & RP_FIXED) {
+ not_rpfixed = 0;
+ } else if (ret == RP_EXCLUDED) {
+ ret = 0;
+ goto out_close_handle;
+ } else {
+ not_rpfixed = 1;
+ }
+ }
+
+ /* Create a WIM dentry with an associated inode, which may be shared.
+ *
+ * However, we need to explicitly check for directories and files with
+ * only 1 link and refuse to hard link them. This is because Windows
+ * has a bug where it can return duplicate File IDs for files and
+ * directories on the FAT filesystem. */
+ ret = inode_table_new_dentry(params->inode_table,
+ path_basename_with_len(path, path_num_chars),
+ ((u64)file_info.nFileIndexHigh << 32) |
+ (u64)file_info.nFileIndexLow,
+ file_info.dwVolumeSerialNumber,
+ (file_info.nNumberOfLinks <= 1 ||
+ (file_info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)),
+ &root);
+ if (ret)
+ goto out_close_handle;
+
+ ret = win32_get_short_name(root, path);
+ if (ret)
+ goto out_close_handle;
+
+ inode = root->d_inode;
+
+ if (inode->i_nlink > 1) /* Shared inode; nothing more to do */
+ goto out_close_handle;
+
+ 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_resolved = 1;
+
+ params->add_image_flags &= ~(WIMLIB_ADD_IMAGE_FLAG_ROOT | WIMLIB_ADD_IMAGE_FLAG_SOURCE);
+
+ if (!(params->add_image_flags & WIMLIB_ADD_IMAGE_FLAG_NO_ACLS)
+ && (vol_flags & FILE_PERSISTENT_ACLS))
+ {
+ ret = win32_get_security_descriptor(root, params->sd_set,
+ path, state,
+ params->add_image_flags);
+ if (ret)
+ goto out_close_handle;
+ }
+
+ file_size = ((u64)file_info.nFileSizeHigh << 32) |
+ (u64)file_info.nFileSizeLow;
+
+ CloseHandle(hFile);
+
+ /* Capture the unnamed data stream (only should be present for regular
+ * files) and any alternate data streams. */
+ ret = win32_capture_streams(path,
+ path_num_chars,
+ inode,
+ params->lookup_table,
+ file_size,
+ vol_flags);
+ if (ret)
+ goto out;
+
+ if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT) {
+ /* Reparse point: set the reparse data (which we read already)
+ * */
+ inode->i_not_rpfixed = not_rpfixed;
+ inode->i_reparse_tag = le32_to_cpu(*(u32*)reparse_data);
+ ret = inode_set_unnamed_stream(inode, reparse_data + 8,
+ reparse_data_len - 8,
+ params->lookup_table);
+ } else if (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY) {
+ /* Directory (not a reparse point) --- recurse to children */
+ ret = win32_recurse_directory(root,
+ path,
+ path_num_chars,
+ params,
+ state,
+ vol_flags);
}
+ goto out;
+out_close_handle:
+ CloseHandle(hFile);
+out:
+ if (ret == 0)
+ *root_ret = root;
+ else
+ free_dentry_tree(root, params->lookup_table);
return ret;
}
-bool win32_acquire_privilege(const char *privilege)
+static void
+win32_do_capture_warnings(const struct win32_capture_state *state,
+ int add_image_flags)
{
- return win32_modify_privilege(privilege, true);
+ if (state->num_get_sacl_priv_notheld == 0 &&
+ state->num_get_sd_access_denied == 0)
+ return;
+
+ WARNING("");
+ WARNING("Built dentry tree successfully, but with the following problem(s):");
+ if (state->num_get_sacl_priv_notheld != 0) {
+ WARNING("Could not capture SACL (System Access Control List)\n"
+ " on %lu files or directories.",
+ state->num_get_sacl_priv_notheld);
+ }
+ if (state->num_get_sd_access_denied != 0) {
+ WARNING("Could not capture security descriptor at all\n"
+ " on %lu files or directories.",
+ state->num_get_sd_access_denied);
+ }
+ WARNING(
+ "Try running the program as the Administrator to make sure all the\n"
+" desired metadata has been captured exactly. However, if you\n"
+" do not care about capturing security descriptors correctly, then\n"
+" nothing more needs to be done%ls\n",
+ (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_NO_ACLS) ? L"." :
+ L", although you might consider\n"
+" passing the --no-acls flag to `wimlib-imagex capture' or\n"
+" `wimlib-imagex append' to explicitly capture no security\n"
+" descriptors.\n");
}
-bool win32_release_privilege(const char *privilege)
+/* Win32 version of capturing a directory tree */
+int
+win32_build_dentry_tree(struct wim_dentry **root_ret,
+ const wchar_t *root_disk_path,
+ struct add_image_params *params)
{
- return win32_modify_privilege(privilege, false);
+ size_t path_nchars;
+ wchar_t *path;
+ int ret;
+ struct win32_capture_state state;
+ unsigned vol_flags;
+
+
+ path_nchars = wcslen(root_disk_path);
+ if (path_nchars > 32767)
+ return WIMLIB_ERR_INVALID_PARAM;
+
+ ret = win32_get_file_and_vol_ids(root_disk_path,
+ ¶ms->capture_root_ino,
+ ¶ms->capture_root_dev);
+ if (ret)
+ return ret;
+
+ win32_get_vol_flags(root_disk_path, &vol_flags);
+
+ /* There is no check for overflow later when this buffer is being used!
+ * But the max path length on NTFS is 32767 characters, and paths need
+ * to be written specially to even go past 260 characters, so we should
+ * be okay with 32770 characters. */
+ path = MALLOC(32770 * sizeof(wchar_t));
+ if (!path)
+ return WIMLIB_ERR_NOMEM;
+
+ wmemcpy(path, root_disk_path, path_nchars + 1);
+
+ memset(&state, 0, sizeof(state));
+ ret = win32_build_dentry_tree_recursive(root_ret, path,
+ path_nchars, params,
+ &state, vol_flags);
+ FREE(path);
+ if (ret == 0)
+ win32_do_capture_warnings(&state, params->add_image_flags);
+ return ret;
}
+/* Wrapper around the FSCTL_SET_REPARSE_POINT ioctl to set the reparse data on
+ * an extracted reparse point. */
+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_resource_into_buf(lte, buf + 8, false);
+ 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);
+ if (err == ERROR_ACCESS_DENIED || err == ERROR_PRIVILEGE_NOT_HELD)
+ return WIMLIB_ERR_INSUFFICIENT_PRIVILEGES_TO_EXTRACT;
+ else if (reparse_tag == WIM_IO_REPARSE_TAG_SYMLINK ||
+ reparse_tag == WIM_IO_REPARSE_TAG_MOUNT_POINT)
+ return WIMLIB_ERR_LINK;
+ else
+ return WIMLIB_ERR_WRITE;
+ }
+ return 0;
+}
+
+/* Wrapper around the FSCTL_SET_COMPRESSION ioctl to change the
+ * FILE_ATTRIBUTE_COMPRESSED flag of a file or directory. */
+static int
+win32_set_compression_state(HANDLE hFile, USHORT format, const wchar_t *path)
+{
+ DWORD bytesReturned;
+ if (!DeviceIoControl(hFile, FSCTL_SET_COMPRESSION,
+ &format, sizeof(USHORT),
+ NULL, 0,
+ &bytesReturned, NULL))
+ {
+ /* Could be a warning only, but we only call this if the volume
+ * supports compression. So I'm calling this an error. */
+ DWORD err = GetLastError();
+ ERROR("Failed to set compression flag on \"%ls\"", path);
+ win32_error(err);
+ if (err == ERROR_ACCESS_DENIED || err == ERROR_PRIVILEGE_NOT_HELD)
+ return WIMLIB_ERR_INSUFFICIENT_PRIVILEGES_TO_EXTRACT;
+ else
+ return WIMLIB_ERR_WRITE;
+ }
+ return 0;
+}
+
+/* Wrapper around FSCTL_SET_SPARSE ioctl to set a file as sparse. */
+static int
+win32_set_sparse(HANDLE hFile, const wchar_t *path)
+{
+ DWORD bytesReturned;
+ if (!DeviceIoControl(hFile, FSCTL_SET_SPARSE,
+ NULL, 0,
+ NULL, 0,
+ &bytesReturned, NULL))
+ {
+ /* Could be a warning only, but we only call this if the volume
+ * supports sparse files. So I'm calling this an error. */
+ DWORD err = GetLastError();
+ WARNING("Failed to set sparse flag on \"%ls\"", path);
+ win32_error(err);
+ if (err == ERROR_ACCESS_DENIED || err == ERROR_PRIVILEGE_NOT_HELD)
+ return WIMLIB_ERR_INSUFFICIENT_PRIVILEGES_TO_EXTRACT;
+ else
+ return WIMLIB_ERR_WRITE;
+ }
+ return 0;
+}
+
+/*
+ * Sets the security descriptor on an extracted file.
+ */
+static int
+win32_set_security_data(const struct wim_inode *inode,
+ HANDLE hFile,
+ const wchar_t *path,
+ struct apply_args *args)
+{
+ PSECURITY_DESCRIPTOR descriptor;
+ unsigned long n;
+ DWORD err;
+ const struct wim_security_data *sd;
+
+ SECURITY_INFORMATION securityInformation = 0;
+
+ void *owner = NULL;
+ void *group = NULL;
+ ACL *dacl = NULL;
+ ACL *sacl = NULL;
+
+ BOOL owner_defaulted;
+ BOOL group_defaulted;
+ BOOL dacl_present;
+ BOOL dacl_defaulted;
+ BOOL sacl_present;
+ BOOL sacl_defaulted;
+
+ sd = wim_const_security_data(args->w);
+ descriptor = sd->descriptors[inode->i_security_id];
+
+ GetSecurityDescriptorOwner(descriptor, &owner, &owner_defaulted);
+ if (owner)
+ securityInformation |= OWNER_SECURITY_INFORMATION;
+
+ GetSecurityDescriptorGroup(descriptor, &group, &group_defaulted);
+ if (group)
+ securityInformation |= GROUP_SECURITY_INFORMATION;
+
+ GetSecurityDescriptorDacl(descriptor, &dacl_present,
+ &dacl, &dacl_defaulted);
+ if (dacl)
+ securityInformation |= DACL_SECURITY_INFORMATION;
+
+ GetSecurityDescriptorSacl(descriptor, &sacl_present,
+ &sacl, &sacl_defaulted);
+ if (sacl)
+ securityInformation |= SACL_SECURITY_INFORMATION;
+
+again:
+ if (securityInformation == 0)
+ return 0;
+ if (SetSecurityInfo(hFile, SE_FILE_OBJECT,
+ securityInformation, owner, group, dacl, sacl))
+ return 0;
+ err = GetLastError();
+ if (args->extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_ACLS)
+ goto fail;
+ switch (err) {
+ case ERROR_PRIVILEGE_NOT_HELD:
+ if (securityInformation & SACL_SECURITY_INFORMATION) {
+ n = args->num_set_sacl_priv_notheld++;
+ securityInformation &= ~SACL_SECURITY_INFORMATION;
+ sacl = NULL;
+ if (n < MAX_SET_SACL_PRIV_NOTHELD_WARNINGS) {
+ WARNING(
+"We don't have enough privileges to set the full security\n"
+" descriptor on \"%ls\"!\n", path);
+ if (args->num_set_sd_access_denied +
+ args->num_set_sacl_priv_notheld == 1)
+ {
+ WARNING("%ls", apply_access_denied_msg);
+ }
+ WARNING("Re-trying with SACL omitted.\n", path);
+ } else if (n == MAX_GET_SACL_PRIV_NOTHELD_WARNINGS) {
+ WARNING(
+"Suppressing further 'privileges not held' error messages when setting\n"
+" security descriptors.");
+ }
+ goto again;
+ }
+ /* Fall through */
+ case ERROR_INVALID_OWNER:
+ case ERROR_ACCESS_DENIED:
+ n = args->num_set_sd_access_denied++;
+ if (n < MAX_SET_SD_ACCESS_DENIED_WARNINGS) {
+ WARNING("Failed to set security descriptor on \"%ls\": "
+ "Access denied!\n", path);
+ if (args->num_set_sd_access_denied +
+ args->num_set_sacl_priv_notheld == 1)
+ {
+ WARNING("%ls", apply_access_denied_msg);
+ }
+ } else if (n == MAX_SET_SD_ACCESS_DENIED_WARNINGS) {
+ WARNING(
+"Suppressing further access denied error messages when setting\n"
+" security descriptors");
+ }
+ return 0;
+ default:
+fail:
+ ERROR("Failed to set security descriptor on \"%ls\"", path);
+ win32_error(err);
+ if (err == ERROR_ACCESS_DENIED || err == ERROR_PRIVILEGE_NOT_HELD)
+ return WIMLIB_ERR_INSUFFICIENT_PRIVILEGES_TO_EXTRACT;
+ else
+ return WIMLIB_ERR_WRITE;
+ }
+}
+
+
+static int
+win32_extract_chunk(const void *buf, size_t len, 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, const struct wim_lookup_table_entry *lte)
+{
+ return extract_wim_resource(lte, wim_resource_size(lte),
+ win32_extract_chunk, hStream);
+}
+
+struct win32_encrypted_extract_ctx {
+ void *file_ctx;
+ int wimlib_err_code;
+ bool done;
+ pthread_cond_t cond;
+ pthread_mutex_t mutex;
+ u8 buf[WIM_CHUNK_SIZE];
+ size_t buf_filled;
+};
+
+static DWORD WINAPI
+win32_encrypted_import_cb(unsigned char *data, void *_ctx,
+ unsigned long *len_p)
+{
+ struct win32_encrypted_extract_ctx *ctx = _ctx;
+ unsigned long len = *len_p;
+
+ pthread_mutex_lock(&ctx->mutex);
+ while (len) {
+ size_t bytes_to_copy;
+
+ DEBUG("Importing up to %lu more bytes of raw encrypted data", len);
+ while (ctx->buf_filled == 0) {
+ if (ctx->done)
+ goto out;
+ pthread_cond_wait(&ctx->cond, &ctx->mutex);
+ }
+ bytes_to_copy = min(len, ctx->buf_filled);
+ memcpy(data, ctx->buf, bytes_to_copy);
+ len -= bytes_to_copy;
+ data += bytes_to_copy;
+ ctx->buf_filled -= bytes_to_copy;
+ memmove(ctx->buf, ctx->buf + bytes_to_copy, ctx->buf_filled);
+ pthread_cond_signal(&ctx->cond);
+ }
+out:
+ *len_p -= len;
+ pthread_mutex_unlock(&ctx->mutex);
+ return ERROR_SUCCESS;
+}
+
+/* Extract ("Import") an encrypted file in a different thread. */
+static void *
+win32_encrypted_import_proc(void *arg)
+{
+ struct win32_encrypted_extract_ctx *ctx = arg;
+ DWORD ret;
+ ret = WriteEncryptedFileRaw(win32_encrypted_import_cb, ctx,
+ ctx->file_ctx);
+ pthread_mutex_lock(&ctx->mutex);
+ if (ret == ERROR_SUCCESS) {
+ ctx->wimlib_err_code = 0;
+ } else {
+ win32_error(ret);
+ ctx->wimlib_err_code = WIMLIB_ERR_WRITE;
+ }
+ ctx->done = true;
+ pthread_cond_signal(&ctx->cond);
+ pthread_mutex_unlock(&ctx->mutex);
+ return NULL;
+}
+
+
+static int
+win32_extract_raw_encrypted_chunk(const void *buf, size_t len, void *arg)
+{
+ struct win32_encrypted_extract_ctx *ctx = arg;
+ size_t bytes_to_copy;
+
+ while (len) {
+ DEBUG("Extracting up to %zu more bytes of encrypted data", len);
+ pthread_mutex_lock(&ctx->mutex);
+ while (ctx->buf_filled == WIM_CHUNK_SIZE) {
+ if (ctx->done) {
+ pthread_mutex_unlock(&ctx->mutex);
+ return ctx->wimlib_err_code;
+ }
+ pthread_cond_wait(&ctx->cond, &ctx->mutex);
+ }
+ bytes_to_copy = min(len, WIM_CHUNK_SIZE - ctx->buf_filled);
+ memcpy(&ctx->buf[ctx->buf_filled], buf, bytes_to_copy);
+ len -= bytes_to_copy;
+ buf += bytes_to_copy;
+ ctx->buf_filled += bytes_to_copy;
+ pthread_cond_signal(&ctx->cond);
+ pthread_mutex_unlock(&ctx->mutex);
+ }
+ return 0;
+}
+
+/* Create an encrypted file and extract the raw encrypted data to it.
+ *
+ * @path: Path to encrypted file to create.
+ * @lte: WIM lookup_table entry for the raw encrypted data.
+ *
+ * This is separate from do_win32_extract_stream() because the WIM is supposed
+ * to contain the *raw* encrypted data, which needs to be extracted ("imported")
+ * using the special APIs OpenEncryptedFileRawW(), WriteEncryptedFileRaw(), and
+ * CloseEncryptedFileRaw().
+ *
+ * Returns 0 on success; nonzero on failure.
+ */
+static int
+do_win32_extract_encrypted_stream(const wchar_t *path,
+ const struct wim_lookup_table_entry *lte)
+{
+ struct win32_encrypted_extract_ctx ctx;
+ void *file_ctx;
+ pthread_t import_thread;
+ int ret;
+ int ret2;
+
+ DEBUG("Opening file \"%ls\" to extract raw encrypted data", path);
+
+ ret = OpenEncryptedFileRawW(path, CREATE_FOR_IMPORT, &file_ctx);
+ if (ret) {
+ ERROR("Failed to open \"%ls\" to write raw encrypted data", path);
+ win32_error(ret);
+ return WIMLIB_ERR_OPEN;
+ }
+
+ if (!lte)
+ goto out_close;
+
+ /* Hack alert: WriteEncryptedFileRaw() requires the callback function
+ * to work with a buffer whose size we cannot control. This doesn't
+ * play well with our read_resource_prefix() function, which itself uses
+ * a callback function to extract WIM_CHUNK_SIZE chunks of data. We
+ * work around this problem by calling WriteEncryptedFileRaw() in a
+ * different thread and feeding it the data as needed. */
+ ctx.file_ctx = file_ctx;
+ ctx.buf_filled = 0;
+ ctx.done = false;
+ ctx.wimlib_err_code = 0;
+ if (pthread_mutex_init(&ctx.mutex, NULL)) {
+ ERROR_WITH_ERRNO("Can't create mutex");
+ ret = WIMLIB_ERR_NOMEM;
+ goto out_close;
+ }
+ if (pthread_cond_init(&ctx.cond, NULL)) {
+ ERROR_WITH_ERRNO("Can't create condition variable");
+ ret = WIMLIB_ERR_NOMEM;
+ goto out_pthread_mutex_destroy;
+ }
+ ret = pthread_create(&import_thread, NULL,
+ win32_encrypted_import_proc, &ctx);
+ if (ret) {
+ errno = ret;
+ ERROR_WITH_ERRNO("Failed to create thread");
+ ret = WIMLIB_ERR_FORK;
+ goto out_pthread_cond_destroy;
+ }
+
+ ret = extract_wim_resource(lte, wim_resource_size(lte),
+ win32_extract_raw_encrypted_chunk, &ctx);
+ pthread_mutex_lock(&ctx.mutex);
+ ctx.done = true;
+ pthread_cond_signal(&ctx.cond);
+ pthread_mutex_unlock(&ctx.mutex);
+ ret2 = pthread_join(import_thread, NULL);
+ if (ret2) {
+ errno = ret2;
+ ERROR_WITH_ERRNO("Failed to join encrypted import thread");
+ if (ret == 0)
+ ret = WIMLIB_ERR_WRITE;
+ }
+ if (ret == 0)
+ ret = ctx.wimlib_err_code;
+out_pthread_cond_destroy:
+ pthread_cond_destroy(&ctx.cond);
+out_pthread_mutex_destroy:
+ pthread_mutex_destroy(&ctx.mutex);
+out_close:
+ CloseEncryptedFileRaw(file_ctx);
+ if (ret)
+ ERROR("Failed to extract encrypted file \"%ls\"", path);
+ return ret;
+}
+
+static bool
+path_is_root_of_drive(const wchar_t *path)
+{
+ if (!*path)
+ return false;
+
+ if (*path != L'/' && *path != L'\\') {
+ if (*(path + 1) == L':')
+ path += 2;
+ else
+ return false;
+ }
+ while (*path == L'/' || *path == L'\\')
+ path++;
+ return (*path == L'\0');
+}
+
+static inline DWORD
+win32_mask_attributes(DWORD i_attributes)
+{
+ return i_attributes & ~(FILE_ATTRIBUTE_SPARSE_FILE |
+ FILE_ATTRIBUTE_COMPRESSED |
+ FILE_ATTRIBUTE_REPARSE_POINT |
+ FILE_ATTRIBUTE_DIRECTORY |
+ FILE_ATTRIBUTE_ENCRYPTED |
+ FILE_FLAG_DELETE_ON_CLOSE |
+ FILE_FLAG_NO_BUFFERING |
+ FILE_FLAG_OPEN_NO_RECALL |
+ FILE_FLAG_OVERLAPPED |
+ FILE_FLAG_RANDOM_ACCESS |
+ /*FILE_FLAG_SESSION_AWARE |*/
+ FILE_FLAG_SEQUENTIAL_SCAN |
+ FILE_FLAG_WRITE_THROUGH);
+}
+
+static inline DWORD
+win32_get_create_flags_and_attributes(DWORD i_attributes)
+{
+ /*
+ * Some attributes cannot be set by passing them to CreateFile(). In
+ * particular:
+ *
+ * FILE_ATTRIBUTE_DIRECTORY:
+ * CreateDirectory() must be called instead of CreateFile().
+ *
+ * FILE_ATTRIBUTE_SPARSE_FILE:
+ * Needs an ioctl.
+ * See: win32_set_sparse().
+ *
+ * FILE_ATTRIBUTE_COMPRESSED:
+ * Not clear from the documentation, but apparently this needs an
+ * ioctl as well.
+ * See: win32_set_compressed().
+ *
+ * FILE_ATTRIBUTE_REPARSE_POINT:
+ * Needs an ioctl, with the reparse data specified.
+ * See: win32_set_reparse_data().
+ *
+ * In addition, clear any file flags in the attributes that we don't
+ * want, but also specify FILE_FLAG_OPEN_REPARSE_POINT and
+ * FILE_FLAG_BACKUP_SEMANTICS as we are a backup application.
+ */
+ return win32_mask_attributes(i_attributes) |
+ FILE_FLAG_OPEN_REPARSE_POINT |
+ FILE_FLAG_BACKUP_SEMANTICS;
+}
+
+/* Set compression and/or sparse attributes on a stream, if supported by the
+ * volume. */
+static int
+win32_set_special_stream_attributes(HANDLE hFile, const struct wim_inode *inode,
+ struct wim_lookup_table_entry *unnamed_stream_lte,
+ const wchar_t *path, unsigned vol_flags)
+{
+ int ret;
+
+ if (inode->i_attributes & FILE_ATTRIBUTE_COMPRESSED) {
+ if (vol_flags & FILE_FILE_COMPRESSION) {
+ ret = win32_set_compression_state(hFile,
+ COMPRESSION_FORMAT_DEFAULT,
+ path);
+ if (ret)
+ return ret;
+ } else {
+ DEBUG("Cannot set compression attribute on \"%ls\": "
+ "volume does not support transparent compression",
+ path);
+ }
+ }
+
+ if (inode->i_attributes & FILE_ATTRIBUTE_SPARSE_FILE) {
+ if (vol_flags & FILE_SUPPORTS_SPARSE_FILES) {
+ DEBUG("Setting sparse flag on \"%ls\"", path);
+ ret = win32_set_sparse(hFile, path);
+ if (ret)
+ return ret;
+ } else {
+ DEBUG("Cannot set sparse attribute on \"%ls\": "
+ "volume does not support sparse files",
+ path);
+ }
+ }
+ return 0;
+}
+
+/* Pre-create directories; extract encrypted streams */
+static int
+win32_begin_extract_unnamed_stream(const struct wim_inode *inode,
+ const struct wim_lookup_table_entry *lte,
+ const wchar_t *path,
+ DWORD *creationDisposition_ret,
+ unsigned int vol_flags)
+{
+ DWORD err;
+ int ret;
+
+ /* 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 &&
+ !path_is_root_of_drive(path)) {
+ if (!CreateDirectoryW(path, NULL)) {
+ err = GetLastError();
+ if (err != ERROR_ALREADY_EXISTS) {
+ ERROR("Failed to create directory \"%ls\"",
+ path);
+ win32_error(err);
+ return WIMLIB_ERR_MKDIR;
+ }
+ }
+ DEBUG("Created directory \"%ls\"", path);
+ *creationDisposition_ret = OPEN_EXISTING;
+ }
+ if (inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED &&
+ vol_flags & FILE_SUPPORTS_ENCRYPTION)
+ {
+ if (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY) {
+ if (!EncryptFile(path)) {
+ err = GetLastError();
+ ERROR("Failed to encrypt directory \"%ls\"",
+ path);
+ win32_error(err);
+ return WIMLIB_ERR_WRITE;
+ }
+ } else {
+ ret = do_win32_extract_encrypted_stream(path, lte);
+ if (ret)
+ return ret;
+ DEBUG("Extracted encrypted file \"%ls\"", path);
+ }
+ *creationDisposition_ret = OPEN_EXISTING;
+ }
+
+ /* Set file attributes if we created the file. Otherwise, we haven't
+ * created the file set and we will set the attributes in the call to
+ * CreateFileW().
+ *
+ * The FAT filesystem does not let you change the attributes of the root
+ * directory, so treat that as a special case and do not set attributes.
+ * */
+ if (*creationDisposition_ret == OPEN_EXISTING &&
+ !path_is_root_of_drive(path))
+ {
+ if (!SetFileAttributesW(path,
+ win32_mask_attributes(inode->i_attributes)))
+ {
+ err = GetLastError();
+ ERROR("Failed to set attributes on \"%ls\"", path);
+ win32_error(err);
+ return WIMLIB_ERR_WRITE;
+ }
+ }
+ return 0;
+}
+
+/* Set security descriptor and extract stream data or reparse data (skip the
+ * unnamed data stream of encrypted files, which was already extracted). */
+static int
+win32_finish_extract_stream(HANDLE h, const struct wim_inode *inode,
+ const struct wim_lookup_table_entry *lte,
+ const wchar_t *stream_path,
+ const wchar_t *stream_name_utf16,
+ struct apply_args *args)
+{
+ int ret = 0;
+ if (stream_name_utf16 == NULL) {
+ /* Unnamed stream. */
+
+ /* Set security descriptor, unless the extract_flags indicate
+ * not to or the volume does not supported it. Note that this
+ * is only done when the unnamed stream is being extracted, as
+ * security descriptors are per-file and not per-stream. */
+ if (inode->i_security_id >= 0 &&
+ !(args->extract_flags & WIMLIB_EXTRACT_FLAG_NO_ACLS)
+ && (args->vol_flags & FILE_PERSISTENT_ACLS))
+ {
+ ret = win32_set_security_data(inode, h, stream_path, args);
+ if (ret)
+ return ret;
+ }
+
+ /* Handle reparse points. The data for them needs to be set
+ * using a special ioctl. Note that the reparse point may have
+ * been created using CreateFileW() in the case of
+ * non-directories or CreateDirectoryW() in the case of
+ * directories; but the ioctl works either way. Also, it is
+ * only this step that actually sets the
+ * FILE_ATTRIBUTE_REPARSE_POINT, as it is not valid to set it
+ * using SetFileAttributesW() or CreateFileW().
+ *
+ * If the volume does not support reparse points we simply
+ * ignore the reparse data. (N.B. the code currently doesn't
+ * actually reach this case because reparse points are skipped
+ * entirely on such volumes.) */
+ if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT) {
+ if (args->vol_flags & FILE_SUPPORTS_REPARSE_POINTS) {
+ DEBUG("Setting reparse data on \"%ls\"",
+ stream_path);
+ ret = win32_set_reparse_data(h,
+ inode->i_reparse_tag,
+ lte, stream_path);
+ if (ret)
+ return ret;
+ } else {
+ DEBUG("Cannot set reparse data on \"%ls\": volume "
+ "does not support reparse points", stream_path);
+ }
+ } else if (lte != NULL &&
+ !(args->vol_flags & FILE_SUPPORTS_ENCRYPTION &&
+ inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED))
+ {
+ /* Extract the data of the unnamed stream, unless the
+ * lookup table entry is NULL (indicating an empty
+ * stream for which no data needs to be extracted), or
+ * the stream is encrypted and therefore was already
+ * extracted as a special case. */
+ ret = do_win32_extract_stream(h, lte);
+ }
+ } else {
+ /* Extract the data for a named data stream. */
+ if (lte != NULL) {
+ DEBUG("Extracting named data stream \"%ls\" (len = %"PRIu64")",
+ stream_path, wim_resource_size(lte));
+ ret = do_win32_extract_stream(h, lte);
+ }
+ }
+ return ret;
+}
+
+static int
+win32_decrypt_file(HANDLE open_handle, const wchar_t *path)
+{
+ DWORD err;
+ /* We cannot call DecryptFileW() while there is an open handle to the
+ * file. So close it first. */
+ if (!CloseHandle(open_handle)) {
+ err = GetLastError();
+ ERROR("Failed to close handle for \"%ls\"", path);
+ win32_error(err);
+ return WIMLIB_ERR_WRITE;
+ }
+ if (!DecryptFileW(path, 0 /* reserved parameter; set to 0 */)) {
+ err = GetLastError();
+ ERROR("Failed to decrypt file \"%ls\"", path);
+ win32_error(err);
+ return WIMLIB_ERR_WRITE;
+ }
+ return 0;
+}
+
+/*
+ * Create and extract a stream to a file, or create a directory, using the
+ * Windows API.
+ *
+ * This handles reparse points, directories, alternate data streams, encrypted
+ * files, compressed files, etc.
+ *
+ * @inode: WIM inode containing the stream.
+ *
+ * @path: Path to extract the file to.
+ *
+ * @stream_name_utf16:
+ * Name of the stream, or NULL if the stream is unnamed. This will
+ * be called with a NULL stream_name_utf16 before any non-NULL
+ * stream_name_utf16's.
+ *
+ * @lte: WIM lookup table entry for the stream. May be NULL to indicate
+ * a stream of length 0.
+ *
+ * @args: Additional apply context, including flags indicating supported
+ * volume features.
+ *
+ * Returns 0 on success; nonzero on failure.
+ */
+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,
+ struct apply_args *args)
+{
+ wchar_t *stream_path;
+ HANDLE h;
+ int ret;
+ DWORD err;
+ DWORD creationDisposition = CREATE_ALWAYS;
+ DWORD requestedAccess;
+ BY_HANDLE_FILE_INFORMATION file_info;
+
+ 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] != cpu_to_le16(L'\0') &&
+ path[0] != cpu_to_le16(L'/') &&
+ path[0] != cpu_to_le16(L'\\') &&
+ path[1] != cpu_to_le16(L':'))
+ {
+ prefix = L"./";
+ stream_path_nchars += 2;
+ } else {
+ prefix = L"";
+ }
+ stream_path = alloca((stream_path_nchars + 1) * sizeof(wchar_t));
+ swprintf(stream_path, 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;
+
+ ret = win32_begin_extract_unnamed_stream(inode, lte, path,
+ &creationDisposition,
+ args->vol_flags);
+ if (ret)
+ goto fail;
+ }
+
+ DEBUG("Opening \"%ls\"", stream_path);
+ requestedAccess = GENERIC_READ | GENERIC_WRITE |
+ ACCESS_SYSTEM_SECURITY;
+try_open_again:
+ /* Open the stream to be extracted. Depending on what we have set
+ * creationDisposition to, we may be creating this for the first time,
+ * or we may be opening on existing stream we already created using
+ * CreateDirectoryW() or OpenEncryptedFileRawW(). */
+ h = CreateFileW(stream_path,
+ requestedAccess,
+ 0,
+ NULL,
+ creationDisposition,
+ win32_get_create_flags_and_attributes(inode->i_attributes),
+ NULL);
+ if (h == INVALID_HANDLE_VALUE) {
+ err = GetLastError();
+ if (err == ERROR_ACCESS_DENIED &&
+ path_is_root_of_drive(stream_path))
+ {
+ ret = 0;
+ goto out;
+ }
+ if ((err == ERROR_PRIVILEGE_NOT_HELD ||
+ err == ERROR_ACCESS_DENIED) &&
+ (requestedAccess & ACCESS_SYSTEM_SECURITY))
+ {
+ /* Try opening the file again without privilege to
+ * modify SACL. */
+ requestedAccess &= ~ACCESS_SYSTEM_SECURITY;
+ goto try_open_again;
+ }
+ ERROR("Failed to create \"%ls\"", stream_path);
+ win32_error(err);
+ ret = WIMLIB_ERR_OPEN;
+ goto fail;
+ }
+
+ /* Check the attributes of the file we just opened, and remove
+ * encryption or compression if either was set by default but is not
+ * supposed to be set based on the WIM inode attributes. */
+ if (!GetFileInformationByHandle(h, &file_info)) {
+ err = GetLastError();
+ ERROR("Failed to get attributes of \"%ls\"", stream_path);
+ win32_error(err);
+ ret = WIMLIB_ERR_STAT;
+ goto fail_close_handle;
+ }
+
+ /* Remove encryption? */
+ if (file_info.dwFileAttributes & FILE_ATTRIBUTE_ENCRYPTED &&
+ !(inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED))
+ {
+ /* File defaulted to encrypted due to being in an encrypted
+ * directory, but is not actually supposed to be encrypted.
+ *
+ * This is a workaround, because I'm not aware of any way to
+ * directly (e.g. with CreateFileW()) create an unencrypted file
+ * in a directory with FILE_ATTRIBUTE_ENCRYPTED set. */
+ ret = win32_decrypt_file(h, stream_path);
+ if (ret)
+ goto fail; /* win32_decrypt_file() closed the handle. */
+ creationDisposition = OPEN_EXISTING;
+ goto try_open_again;
+ }
+
+ /* Remove compression? */
+ if (file_info.dwFileAttributes & FILE_ATTRIBUTE_COMPRESSED &&
+ !(inode->i_attributes & FILE_ATTRIBUTE_COMPRESSED))
+ {
+ /* Similar to the encrypted case, above, if the file defaulted
+ * to compressed due to being in an compressed directory, but is
+ * not actually supposed to be compressed, explicitly set the
+ * compression format to COMPRESSION_FORMAT_NONE. */
+ ret = win32_set_compression_state(h, COMPRESSION_FORMAT_NONE,
+ stream_path);
+ if (ret)
+ goto fail_close_handle;
+ }
+
+ /* Set compression and/or sparse attributes if needed */
+ ret = win32_set_special_stream_attributes(h, inode, lte, path,
+ args->vol_flags);
+
+ if (ret)
+ goto fail_close_handle;
+
+ /* At this point we have at least created the needed stream with the
+ * appropriate attributes. We have yet to set the appropriate security
+ * descriptor and actually extract the stream data (other than for
+ * extracted files, which were already extracted).
+ * win32_finish_extract_stream() handles these additional steps. */
+ ret = win32_finish_extract_stream(h, inode, lte, stream_path,
+ stream_name_utf16, args);
+ if (ret)
+ goto fail_close_handle;
+
+ /* Done extracting the stream. Close the handle and return. */
+ 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). Handles sparse, compressed, and/or encrypted files.
+ *
+ * @inode: WIM inode for this file or directory.
+ * @path: UTF-16LE external path to extract the inode to.
+ * @args: Additional extraction context.
+ *
+ * Returns 0 on success; nonzero on failure.
+ */
+static int
+win32_extract_streams(const struct wim_inode *inode,
+ const wchar_t *path, struct apply_args *args)
+{
+ struct wim_lookup_table_entry *unnamed_lte;
+ int ret;
+
+ /* First extract the unnamed stream. */
+
+ unnamed_lte = inode_unnamed_lte_resolved(inode);
+ ret = win32_extract_stream(inode, path, NULL, unnamed_lte, args);
+ if (ret)
+ goto out;
+
+ /* Extract any named streams, if supported by the volume. */
+
+ if (!(args->vol_flags & FILE_NAMED_STREAMS))
+ goto out;
+ for (u16 i = 0; i < inode->i_num_ads; i++) {
+ const struct wim_ads_entry *ads_entry = &inode->i_ads_entries[i];
+
+ /* Skip the unnamed stream if it's in the ADS entries (we
+ * already extracted it...) */
+ if (ads_entry->stream_name_nbytes == 0)
+ continue;
+
+ /* 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;
+
+ /* Extract the named stream */
+ ret = win32_extract_stream(inode,
+ path,
+ ads_entry->stream_name,
+ ads_entry->lte,
+ args);
+ if (ret)
+ break;
+ }
+out:
+ return ret;
+}
+
+/* If not done already, load the supported feature flags for the volume onto
+ * which the image is being extracted, and warn the user about any missing
+ * features that could be important. */
+static int
+win32_check_vol_flags(const wchar_t *output_path, struct apply_args *args)
+{
+ if (args->have_vol_flags)
+ return 0;
+
+ win32_get_vol_flags(output_path, &args->vol_flags);
+ args->have_vol_flags = true;
+ /* Warn the user about data that may not be extracted. */
+ if (!(args->vol_flags & FILE_SUPPORTS_SPARSE_FILES))
+ WARNING("Volume does not support sparse files!\n"
+ " Sparse files will be extracted as non-sparse.");
+ if (!(args->vol_flags & FILE_SUPPORTS_REPARSE_POINTS))
+ WARNING("Volume does not support reparse points!\n"
+ " Reparse point data will not be extracted.");
+ if (!(args->vol_flags & FILE_NAMED_STREAMS)) {
+ WARNING("Volume does not support named data streams!\n"
+ " Named data streams will not be extracted.");
+ }
+ if (!(args->vol_flags & FILE_SUPPORTS_ENCRYPTION)) {
+ WARNING("Volume does not support encryption!\n"
+ " Encrypted files will be extracted as raw data.");
+ }
+ if (!(args->vol_flags & FILE_FILE_COMPRESSION)) {
+ WARNING("Volume does not support transparent compression!\n"
+ " Compressed files will be extracted as non-compressed.");
+ }
+ if (!(args->vol_flags & FILE_PERSISTENT_ACLS)) {
+ if (args->extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_ACLS) {
+ ERROR("Strict ACLs requested, but the volume does not "
+ "support ACLs!");
+ return WIMLIB_ERR_VOLUME_LACKS_FEATURES;
+ } else {
+ WARNING("Volume does not support persistent ACLS!\n"
+ " File permissions will not be extracted.");
+ }
+ }
+ return 0;
+}
+
+/*
+ * Try extracting a hard link.
+ *
+ * @output_path: Path to link to be extracted.
+ *
+ * @inode: WIM inode that the link is to; inode->i_extracted_file
+ * the path to a name of the file that has already been
+ * extracted (we use this to create the hard link).
+ *
+ * @args: Additional apply context, used here to keep track of
+ * the number of times creating a hard link failed due to
+ * ERROR_INVALID_FUNCTION. This error should indicate that hard
+ * links are not supported by the volume, and we would like to
+ * warn the user a few times, but not too many times.
+ *
+ * Returns 0 if the hard link was successfully extracted. Returns
+ * WIMLIB_ERR_LINK (> 0) if an error occurred, other than hard links possibly
+ * being unsupported by the volume. Returns a negative value if creating the
+ * hard link failed due to ERROR_INVALID_FUNCTION.
+ */
+static int
+win32_try_hard_link(const wchar_t *output_path, const struct wim_inode *inode,
+ struct apply_args *args)
+{
+ DWORD err;
+
+ /* There is a volume flag for this (FILE_SUPPORTS_HARD_LINKS),
+ * but it's only available on Windows 7 and later. So no use
+ * even checking it, really. Instead, CreateHardLinkW() will
+ * apparently return ERROR_INVALID_FUNCTION if the volume does
+ * not support hard links. */
+ DEBUG("Creating hard link \"%ls => %ls\"",
+ output_path, inode->i_extracted_file);
+ if (CreateHardLinkW(output_path, inode->i_extracted_file, NULL))
+ return 0;
+
+ err = GetLastError();
+ if (err != ERROR_INVALID_FUNCTION) {
+ ERROR("Can't create hard link \"%ls => %ls\"",
+ output_path, inode->i_extracted_file);
+ win32_error(err);
+ return WIMLIB_ERR_LINK;
+ } else {
+ args->num_hard_links_failed++;
+ if (args->num_hard_links_failed < MAX_CREATE_HARD_LINK_WARNINGS) {
+ WARNING("Can't create hard link \"%ls => %ls\":\n"
+ " Volume does not support hard links!\n"
+ " Falling back to extracting a copy of the file.",
+ output_path, inode->i_extracted_file);
+ } else if (args->num_hard_links_failed == MAX_CREATE_HARD_LINK_WARNINGS) {
+ WARNING("Suppressing further hard linking warnings...");
+ }
+ return -1;
+ }
+}
+
+/* Extract a file, directory, reparse point, or hard link to an
+ * already-extracted file using the Win32 API */
+int
+win32_do_apply_dentry(const wchar_t *output_path,
+ size_t output_path_num_chars,
+ struct wim_dentry *dentry,
+ struct apply_args *args)
+{
+ int ret;
+ struct wim_inode *inode = dentry->d_inode;
+
+ ret = win32_check_vol_flags(output_path, args);
+ 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. */
+ ret = win32_try_hard_link(output_path, inode, args);
+ if (ret >= 0)
+ return ret;
+ /* Negative return value from win32_try_hard_link() indicates
+ * that hard links are probably not supported by the volume.
+ * Fall back to extracting a copy of the file. */
+ }
+
+ /* If this is a reparse point and the volume does not support reparse
+ * points, just skip it completely. */
+ if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT &&
+ !(args->vol_flags & FILE_SUPPORTS_REPARSE_POINTS))
+ {
+ WARNING("Skipping extraction of reparse point \"%ls\":\n"
+ " Not supported by destination filesystem",
+ output_path);
+ } else {
+ /* Create the file, directory, or reparse point, and extract the
+ * data streams. */
+ ret = win32_extract_streams(inode, output_path, args);
+ if (ret)
+ return ret;
+ }
+ if (inode->i_extracted_file == NULL) {
+ const struct wim_lookup_table_entry *lte;
+
+ /* Tally bytes extracted, including all alternate data streams,
+ * unless we extracted a hard link (or, at least extracted a
+ * name that was supposed to be a hard link) */
+ for (unsigned i = 0; i <= inode->i_num_ads; i++) {
+ lte = inode_stream_lte_resolved(inode, i);
+ if (lte)
+ args->progress.extract.completed_bytes +=
+ wim_resource_size(lte);
+ }
+ if (inode->i_nlink > 1) {
+ /* Save extracted path for a later call to
+ * CreateHardLinkW() if this inode has multiple links.
+ * */
+ inode->i_extracted_file = WSTRDUP(output_path);
+ if (!inode->i_extracted_file)
+ return WIMLIB_ERR_NOMEM;
+ }
+ }
+ return 0;
+}
+
+/* Set timestamps on an extracted file using the Win32 API */
+int
+win32_do_apply_dentry_timestamps(const wchar_t *path,
+ size_t path_num_chars,
+ const struct wim_dentry *dentry,
+ const struct apply_args *args)
+{
+ DWORD err;
+ HANDLE h;
+ const struct wim_inode *inode = dentry->d_inode;
+
+ if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT &&
+ !(args->vol_flags & FILE_SUPPORTS_REPARSE_POINTS))
+ {
+ /* Skip reparse points not extracted */
+ return 0;
+ }
+
+ /* Windows doesn't let you change the timestamps of the root directory
+ * (at least on FAT, which is dumb but expected since FAT doesn't store
+ * any metadata about the root directory...) */
+ if (path_is_root_of_drive(path))
+ return 0;
+
+ DEBUG("Opening \"%ls\" to set timestamps", path);
+ h = win32_open_existing_file(path, FILE_WRITE_ATTRIBUTES);
+ if (h == INVALID_HANDLE_VALUE) {
+ err = GetLastError();
+ 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 \"%ls\"", path);
+ if (!SetFileTime(h, &creationTime, &lastAccessTime, &lastWriteTime)) {
+ err = GetLastError();
+ CloseHandle(h);
+ goto fail;
+ }
+ DEBUG("Closing \"%ls\"", path);
+ if (!CloseHandle(h)) {
+ err = GetLastError();
+ goto fail;
+ }
+ goto out;
+fail:
+ /* Only warn if setting timestamps failed; still return 0. */
+ WARNING("Can't set timestamps on \"%ls\"", path);
+ win32_error(err);
+out:
+ return 0;
+}
+
+/* Replacement for POSIX fsync() */
+int
+fsync(int fd)
+{
+ DWORD err;
+ HANDLE h;
+
+ h = (HANDLE)_get_osfhandle(fd);
+ if (h == INVALID_HANDLE_VALUE) {
+ err = GetLastError();
+ ERROR("Could not get Windows handle for file descriptor");
+ win32_error(err);
+ errno = EBADF;
+ return -1;
+ }
+ if (!FlushFileBuffers(h)) {
+ err = GetLastError();
+ ERROR("Could not flush file buffers to disk");
+ win32_error(err);
+ 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. */
+wchar_t *
+realpath(const wchar_t *path, wchar_t *resolved_path)
+{
+ DWORD ret;
+ wimlib_assert(resolved_path == NULL);
+ DWORD err;
+
+ ret = GetFullPathNameW(path, 0, NULL, NULL);
+ if (!ret) {
+ err = GetLastError();
+ goto fail_win32;
+ }
+
+ resolved_path = TMALLOC(ret);
+ if (!resolved_path)
+ goto out;
+ ret = GetFullPathNameW(path, ret, resolved_path, NULL);
+ if (!ret) {
+ err = GetLastError();
+ free(resolved_path);
+ resolved_path = NULL;
+ goto fail_win32;
+ }
+ goto out;
+fail_win32:
+ win32_error(err);
+ errno = -1;
+out:
+ return resolved_path;
+}
+
+/* rename() on Windows fails if the destination file exists. And we need to
+ * make it work on wide characters. Fix it. */
+int
+win32_rename_replacement(const wchar_t *oldpath, const wchar_t *newpath)
+{
+ if (MoveFileExW(oldpath, newpath, MOVEFILE_REPLACE_EXISTING)) {
+ return 0;
+ } else {
+ /* As usual, the possible error values are not documented */
+ DWORD err = GetLastError();
+ ERROR("MoveFileEx(): Can't rename \"%ls\" to \"%ls\"",
+ oldpath, newpath);
+ win32_error(err);
+ errno = -1;
+ return -1;
+ }
+}
+
+/* Replacement for POSIX fnmatch() (partial functionality only) */
+int
+fnmatch(const wchar_t *pattern, const wchar_t *string, int flags)
+{
+ if (PathMatchSpecW(string, pattern))
+ return 0;
+ else
+ return FNM_NOMATCH;
+}
+
+/* truncate() replacement */
+int
+win32_truncate_replacement(const wchar_t *path, off_t size)
+{
+ DWORD err = NO_ERROR;
+ LARGE_INTEGER liOffset;
+
+ HANDLE h = win32_open_existing_file(path, GENERIC_WRITE);
+ if (h == INVALID_HANDLE_VALUE)
+ goto fail;
+
+ liOffset.QuadPart = size;
+ if (!SetFilePointerEx(h, liOffset, NULL, FILE_BEGIN))
+ goto fail_close_handle;
+
+ if (!SetEndOfFile(h))
+ goto fail_close_handle;
+ CloseHandle(h);
+ return 0;
+
+fail_close_handle:
+ err = GetLastError();
+ CloseHandle(h);
+fail:
+ if (err == NO_ERROR)
+ err = GetLastError();
+ ERROR("Can't truncate \"%ls\" to %"PRIu64" bytes", path, size);
+ win32_error(err);
+ errno = -1;
+ return -1;
+}
+
+
+/* This really could be replaced with _wcserror_s, but this doesn't seem to
+ * actually be available in MSVCRT.DLL on Windows XP (perhaps it's statically
+ * linked in by Visual Studio...?). */
+extern int
+win32_strerror_r_replacement(int errnum, wchar_t *buf, size_t buflen)
+{
+ static pthread_mutex_t strerror_lock = PTHREAD_MUTEX_INITIALIZER;
+
+ pthread_mutex_lock(&strerror_lock);
+ mbstowcs(buf, strerror(errnum), buflen);
+ buf[buflen - 1] = '\0';
+ pthread_mutex_unlock(&strerror_lock);
+ return 0;
+}
-#endif /* __CYGWIN__ || __WIN32__ */
+#endif /* __WIN32__ */
git://wimlib.net / wimlib / blobdiff