* extract_image.c
*
* Support for extracting WIM files.
- *
- * This code does NOT contain any filesystem-specific features. In particular,
- * security information (i.e. file permissions) and alternate data streams are
- * ignored, except possibly to read an alternate data stream that contains
- * symbolic link data.
*/
/*
#include "config.h"
#if defined(__CYGWIN__) || defined(__WIN32__)
-#include <windows.h>
+# include <windows.h>
# ifdef ERROR
# undef ERROR
# endif
-#include <wchar.h>
+# include <wchar.h>
+#else
+# include <dirent.h>
+# ifdef HAVE_UTIME_H
+# include <utime.h>
+# endif
+# include "timestamp.h"
+# include <sys/time.h>
#endif
-#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
+#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
-#include <stdlib.h>
-#include <sys/time.h>
-
-#ifdef HAVE_UTIME_H
-#include <utime.h>
-#endif
#include <unistd.h>
#include "dentry.h"
#include "lookup_table.h"
-#include "timestamp.h"
#include "wimlib_internal.h"
#include "xml.h"
#ifdef HAVE_ALLOCA_H
#include <alloca.h>
-#else
-#include <stdlib.h>
+#endif
+
+#if defined(__WIN32__)
+# define swprintf _snwprintf
+# define mkdir(path, mode) (!CreateDirectoryA(path, NULL))
#endif
#if defined(__CYGWIN__) || defined(__WIN32__)
static int win32_set_reparse_data(HANDLE h,
u32 reparse_tag,
const struct wim_lookup_table_entry *lte,
- const wchar_t *path,
- const char *path_utf8)
+ const wchar_t *path)
{
int ret;
u8 *buf;
size_t len;
-
+
if (!lte) {
- WARNING("\"%s\" is marked as a reparse point but had no reparse data",
- path_utf8);
+ 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("\"%s\": reparse data too long!", path_utf8);
+ 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) = reparse_tag;
*(u16*)(buf + 4) = 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, NULL, NULL))
+ NULL, 0,
+ &bytesReturned /* lpBytesReturned */,
+ NULL /* lpOverlapped */))
{
DWORD err = GetLastError();
- ERROR("Failed to set reparse data on \"%s\"",
- path_utf8);
+ ERROR("Failed to set reparse data on \"%ls\"", path);
win32_error(err);
- ret = WIMLIB_ERR_WRITE;
- } else
- ret = 0;
- return ret;
+ return WIMLIB_ERR_WRITE;
+ }
+ return 0;
}
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,
- const char *path_utf8)
+ struct wim_lookup_table_entry *lte)
{
wchar_t *stream_path;
HANDLE h;
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 = wcslen(path);
- size_t stream_name_nchars = wcslen(stream_name_utf16);
+ 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));
-
- memcpy(stream_path, path, path_nchars * sizeof(wchar_t));
- stream_path[path_nchars] = L':';
- memcpy(&stream_path[path_nchars + 1], stream_name_utf16,
- stream_name_nchars * sizeof(wchar_t));
- stream_path[stream_path_nchars] = L'\0';
-
- /*wsprintf(stream_path, stream_path_nchars, L"%ls:%ls",*/
- /*path, stream_name_utf16);*/
+ 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_FILE_EXISTS &&
- dentry_is_root(inode_first_dentry(inode)))
- {
- /* Already exists */
- return 0;
+ if (err != ERROR_ALREADY_EXISTS) {
+ ERROR("Failed to create directory \"%ls\"",
+ stream_path);
+ win32_error(err);
+ ret = WIMLIB_ERR_MKDIR;
+ goto fail;
}
- ERROR("Failed to create directory \"%s\"", path_utf8);
- 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,
+ GENERIC_WRITE | WRITE_OWNER | WRITE_DAC | ACCESS_SYSTEM_SECURITY,
0,
NULL,
creationDisposition,
NULL);
if (h == INVALID_HANDLE_VALUE) {
err = GetLastError();
- if (err == ERROR_FILE_EXISTS &&
- dentry_is_root(inode_first_dentry(inode)))
- {
- /* Already exists */
- return 0;
- }
- ERROR("Failed to create \"%s\"", path_utf8);
+ ERROR("Failed to create \"%ls\"", stream_path);
win32_error(err);
ret = WIMLIB_ERR_OPEN;
goto fail;
}
- if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT) {
- DEBUG("Setting reparse data on \"%s\"", path_utf8);
- ret = win32_set_reparse_data(h, inode->i_reparse_tag,
- lte, path, path_utf8);
+ 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 stream for \"%s\" (len = %zu)",
- path_utf8, wim_resource_size(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 \"%s\"", path_utf8);
+ ERROR("Failed to close \"%ls\"", stream_path);
win32_error(err);
ret = WIMLIB_ERR_WRITE;
goto fail;
fail_close_handle:
CloseHandle(h);
fail:
- ERROR("Error extracting %s", path_utf8);
+ 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(struct wim_inode *inode,
- const wchar_t *path,
- const char *path_utf8)
+ const wchar_t *path, u64 *completed_bytes_p)
{
struct wim_lookup_table_entry *unnamed_lte;
int ret;
- ret = win32_extract_stream(inode, path, NULL, unnamed_lte, path_utf8);
+ 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_len != 0) {
+ /* Skip special UNIX data entries (see documentation for
+ * WIMLIB_ADD_IMAGE_FLAG_UNIX_DATA) */
+ if (ads_entry->stream_name_len == WIMLIB_UNIX_DATA_TAG_LEN
+ && !memcmp(ads_entry->stream_name_utf8,
+ WIMLIB_UNIX_DATA_TAG,
+ WIMLIB_UNIX_DATA_TAG_LEN))
+ continue;
ret = win32_extract_stream(inode,
path,
(const wchar_t*)ads_entry->stream_name,
- ads_entry->lte,
- path_utf8);
+ ads_entry->lte);
if (ret)
- goto out;
+ break;
+ if (ads_entry->lte)
+ *completed_bytes_p += wim_resource_size(ads_entry->lte);
}
}
- ret = 0;
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,
- const char *path_utf8)
+ const struct wim_security_data *sd)
{
SECURITY_INFORMATION securityInformation = DACL_SECURITY_INFORMATION |
SACL_SECURITY_INFORMATION |
(PSECURITY_DESCRIPTOR)sd->descriptors[inode->i_security_id]))
{
DWORD err = GetLastError();
- ERROR("Can't set security descriptor on \"%s\"", path_utf8);
+ ERROR("Can't set security descriptor on \"%ls\"", path);
win32_error(err);
return WIMLIB_ERR_WRITE;
}
return 0;
}
-#else
+#else /* __CYGWIN__ || __WIN32__ */
static int extract_regular_file_linked(struct wim_dentry *dentry,
const char *output_path,
struct apply_args *args,
return 0;
}
-#endif /* !__CYGWIN__ && !__WIN32__ */
+#endif /* !(__CYGWIN__ || __WIN32__) */
static int extract_directory(struct wim_dentry *dentry,
const char *output_path, bool is_root)
return ret;
if (inode->i_nlink > 1 && inode->i_extracted_file != NULL) {
- /* Linked file, with another name already extracted */
- if (!CreateHardLinkW((const wchar_t*)inode->i_extracted_file,
- (const wchar_t*)utf16_path,
+ /* Linked file, with another name already extracted. Create a
+ * hard link. */
+ DEBUG("Creating hard link \"%ls => %ls\"",
+ (const wchar_t*)utf16_path,
+ (const wchar_t*)inode->i_extracted_file);
+ if (!CreateHardLinkW((const wchar_t*)utf16_path,
+ (const wchar_t*)inode->i_extracted_file,
NULL))
{
err = GetLastError();
- ERROR("Can't create hard link \"%s\"", output_path);
+ ERROR("Can't create hard link \"%ls => %ls\"",
+ (const wchar_t*)utf16_path,
+ (const wchar_t*)inode->i_extracted_file);
ret = WIMLIB_ERR_LINK;
win32_error(err);
- goto out_free_utf16_path;
}
- ret = 0;
- goto out_free_utf16_path;
- }
- ret = win32_extract_streams(inode, (const wchar_t*)utf16_path,
- output_path);
- if (ret)
- goto out_free_utf16_path;
-
- 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,
- (const wchar_t*)utf16_path,
- wim_const_security_data(args->w),
- output_path);
+ } else {
+ /* Create the file, directory, or reparse point, and extract the
+ * data streams. */
+ ret = win32_extract_streams(inode, (const wchar_t*)utf16_path,
+ &args->progress.extract.completed_bytes);
if (ret)
goto out_free_utf16_path;
- }
- /*if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT) {*/
- /*ret = win32_set_reparse_data(inode, path, output_path);*/
- /*if (ret)*/
- /*goto out_free_utf16_path;*/
- /*}*/
-
- if (inode->i_nlink > 1) {
- inode->i_extracted_file = utf16_path;
- utf16_path = NULL;
+ /* 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,
+ (const wchar_t*)utf16_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 = utf16_path;
+ goto out;
+ }
}
- ret = 0;
out_free_utf16_path:
FREE(utf16_path);
+out:
return ret;
#else
if (inode_is_symlink(inode))
static int apply_dentry_timestamps_normal(struct wim_dentry *dentry, void *arg)
{
struct apply_args *args = arg;
- size_t len = strlen(args->target);
- char output_path[len + dentry->full_path_utf8_len + 1];
- const struct wim_inode *inode = dentry->d_inode;
+ size_t len;
+ char *output_path;
int ret;
+ const struct wim_inode *inode = dentry->d_inode;
- memcpy(output_path, args->target, len);
- memcpy(output_path + len, dentry->full_path_utf8, dentry->full_path_utf8_len);
- output_path[len + dentry->full_path_utf8_len] = '\0';
+ len = strlen(args->target);
+ if (dentry_is_root(dentry)) {
+ output_path = (char*)args->target;
+ } else {
+ output_path = alloca(len + dentry->full_path_utf8_len + 1);
+ memcpy(output_path, args->target, len);
+ memcpy(output_path + len, dentry->full_path_utf8, dentry->full_path_utf8_len);
+ output_path[len + dentry->full_path_utf8_len] = '\0';
+ len += dentry->full_path_utf8_len;
+ }
#if defined(__CYGWIN__) || defined(__WIN32__)
/* Win32 */
size_t utf16_path_len;
DWORD err;
HANDLE h;
- BOOL bret1, bret2;
- ret = utf8_to_utf16(output_path, len + dentry->full_path_utf8_len,
- &utf16_path, &utf16_path_len);
+ ret = utf8_to_utf16(output_path, len, &utf16_path, &utf16_path_len);
if (ret)
return ret;
- h = CreateFile(utf16_path, GENERIC_WRITE, 0, NULL, OPEN_EXISTING,
- FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OPEN_REPARSE_POINT,
- NULL);
+
+ DEBUG("Opening \"%s\" to set timestamps", output_path);
+ h = CreateFileW((const wchar_t*)utf16_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();
if (h == INVALID_HANDLE_VALUE)
goto fail;
- FILETIME creationTime = {.dwLowDateTime = dentry->d_inode->i_creation_time & 0xffffffff,
- .dwHighDateTime = dentry->d_inode->i_creation_time >> 32};
- FILETIME lastAccessTime = {.dwLowDateTime = dentry->d_inode->i_last_access_time & 0xffffffff,
- .dwHighDateTime = dentry->d_inode->i_last_access_time >> 32};
- FILETIME lastWriteTime = {.dwLowDateTime = dentry->d_inode->i_last_write_time & 0xffffffff,
- .dwHighDateTime = dentry->d_inode->i_last_write_time >> 32};
+ 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;
}
- return 0;
+ goto out;
fail:
- err = GetLastError();
- ERROR("Can't set timestamps on \"%s\"", output_path);
+ /* Only warn if setting timestamps failed. */
+ WARNING("Can't set timestamps on \"%s\"", output_path);
win32_error(err);
- return WIMLIB_ERR_WRITE;
+out:
+ return 0;
#else
/* UNIX */
w->lookup_table = joined_tab;
}
+#if defined(__CYGWIN__) || defined(__WIN32__)
+ win32_acquire_privilege(SE_RESTORE_NAME);
+ win32_acquire_privilege(SE_SECURITY_NAME);
+ win32_acquire_privilege(SE_TAKE_OWNERSHIP_NAME);
+#endif
if (image == WIMLIB_ALL_IMAGES) {
extract_flags |= WIMLIB_EXTRACT_FLAG_MULTI_IMAGE;
ret = extract_all_images(w, target, extract_flags,
ret = extract_single_image(w, image, target, extract_flags,
progress_func);
}
+#if defined(__CYGWIN__) || defined(__WIN32__)
+ win32_release_privilege(SE_RESTORE_NAME);
+ win32_release_privilege(SE_SECURITY_NAME);
+ win32_release_privilege(SE_TAKE_OWNERSHIP_NAME);
+#endif
if (extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK |
WIMLIB_EXTRACT_FLAG_HARDLINK))
git://wimlib.net / wimlib / blobdiff