* 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>
-#ifdef ERROR
-#undef ERROR
-#endif
-#include <wchar.h>
+#include <dirent.h>
+
+#ifdef __WIN32__
+# include "win32.h"
+#else
+# 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 WITH_NTFS_3G
-#include <ntfs-3g/volume.h>
+# include <ntfs-3g/volume.h>
#endif
#ifdef HAVE_ALLOCA_H
-#include <alloca.h>
-#else
-#include <stdlib.h>
+# include <alloca.h>
#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)
-{
- int ret;
- u8 *buf;
- size_t len;
-
- if (!lte) {
- WARNING("\"%ls\" is marked as a reparse point but had no reparse data",
- path);
- return 0;
- }
- len = wim_resource_size(lte);
- if (len > 16 * 1024 - 8) {
- WARNING("\"%ls\": reparse data too long!", path);
- return 0;
- }
-
- /* The WIM stream omits the ReparseTag and ReparseDataLength fields, so
- * leave 8 bytes of space for them at the beginning of the buffer, then
- * set them manually. */
- buf = alloca(len + 8);
- ret = read_full_wim_resource(lte, buf + 8, 0);
- if (ret)
- return ret;
- *(u32*)(buf + 0) = 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,
- &bytesReturned /* lpBytesReturned */,
- NULL /* lpOverlapped */))
- {
- DWORD err = GetLastError();
- ERROR("Failed to set reparse data on \"%ls\"", path);
- win32_error(err);
- return WIMLIB_ERR_WRITE;
- }
- return 0;
-}
-
-
-static int win32_extract_chunk(const u8 *buf, size_t len, u64 offset, void *arg)
-{
- HANDLE hStream = arg;
-
- DWORD nbytes_written;
- wimlib_assert(len <= 0xffffffff);
-
- if (!WriteFile(hStream, buf, len, &nbytes_written, NULL) ||
- nbytes_written != len)
- {
- DWORD err = GetLastError();
- ERROR("WriteFile(): write error");
- win32_error(err);
- return WIMLIB_ERR_WRITE;
- }
- return 0;
-}
-
-static int do_win32_extract_stream(HANDLE hStream, struct wim_lookup_table_entry *lte)
-{
- return extract_wim_resource(lte, wim_resource_size(lte),
- win32_extract_chunk, hStream);
-}
-
-static int win32_extract_stream(const struct wim_inode *inode,
- const wchar_t *path,
- const wchar_t *stream_name_utf16,
- struct wim_lookup_table_entry *lte)
-{
- wchar_t *stream_path;
- HANDLE h;
- int ret;
- DWORD err;
- DWORD creationDisposition = CREATE_ALWAYS;
-
- if (stream_name_utf16) {
- /* Named stream. Create a buffer that contains the UTF-16LE
- * string [./]@path:@stream_name_utf16. This is needed to
- * create and open the stream using CreateFileW(). I'm not
- * aware of any other APIs to do this. Note: note that the
- * '$DATA' suffix seems to be unneeded; Additional note: a "./"
- * prefix needs to be added when the path is not absolute to
- * avoid ambiguity with drive letters. */
- size_t stream_path_nchars;
- size_t path_nchars;
- size_t stream_name_nchars;
- const wchar_t *prefix;
-
- path_nchars = wcslen(path);
- stream_name_nchars = wcslen(stream_name_utf16);
- stream_path_nchars = path_nchars + 1 + stream_name_nchars;
- if (path[0] != L'/' && path[1] != L'\\') {
- prefix = L"./";
- stream_path_nchars += 2;
- } else {
- prefix = L"";
- }
- stream_path = alloca((stream_path_nchars + 1) * sizeof(wchar_t));
- swprintf(stream_path, stream_path_nchars + 1, L"%ls%ls:%ls",
- prefix, path, stream_name_utf16);
- } else {
- /* Unnamed stream; it's path is just the path to the file
- * itself. */
- stream_path = (wchar_t*)path;
-
- /* Directories must be created with CreateDirectoryW(). Then
- * the call to CreateFileW() will merely open the directory that
- * was already created rather than creating a new file. */
- if (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY) {
- if (!CreateDirectoryW(stream_path, NULL)) {
- err = GetLastError();
- if (err != ERROR_ALREADY_EXISTS) {
- ERROR("Failed to create directory \"%ls\"",
- path);
- win32_error(err);
- ret = WIMLIB_ERR_MKDIR;
- goto fail;
- }
- }
- DEBUG("Created directory \"%ls\"", stream_path);
- if (!(inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT)) {
- ret = 0;
- goto out;
- }
- creationDisposition = OPEN_EXISTING;
- }
- }
-
- DEBUG("Opening \"%ls\"", stream_path);
- h = CreateFileW(stream_path,
- GENERIC_WRITE | WRITE_OWNER | WRITE_DAC,
- 0,
- NULL,
- creationDisposition,
- FILE_FLAG_OPEN_REPARSE_POINT |
- FILE_FLAG_BACKUP_SEMANTICS |
- inode->i_attributes,
- NULL);
- if (h == INVALID_HANDLE_VALUE) {
- err = GetLastError();
- ERROR("Failed to create \"%ls\"", stream_path);
- win32_error(err);
- ret = WIMLIB_ERR_OPEN;
- goto fail;
- }
-
- if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT &&
- stream_name_utf16 == NULL)
- {
- DEBUG("Setting reparse data on \"%ls\"", path);
- ret = win32_set_reparse_data(h, inode->i_reparse_tag, lte, path);
- if (ret)
- goto fail_close_handle;
- } else {
- if (lte) {
- DEBUG("Extracting \"%ls\" (len = %zu)",
- stream_path, wim_resource_size(lte));
- ret = do_win32_extract_stream(h, lte);
- if (ret)
- goto fail_close_handle;
- }
- }
-
- DEBUG("Closing \"%ls\"", stream_path);
- if (!CloseHandle(h)) {
- err = GetLastError();
- ERROR("Failed to close \"%ls\"", stream_path);
- win32_error(err);
- ret = WIMLIB_ERR_WRITE;
- goto fail;
- }
- ret = 0;
- goto out;
-fail_close_handle:
- CloseHandle(h);
-fail:
- ERROR("Error extracting %ls", stream_path);
-out:
- return ret;
-}
-
-/*
- * Creates a file, directory, or reparse point and extracts all streams to it
- * (unnamed data stream and/or reparse point stream, plus any alternate data
- * streams). This in Win32-specific code.
- *
- * @inode: WIM inode for this file or directory.
- * @path: UTF-16LE external path to extract the inode to.
- *
- * Returns 0 on success; nonzero on failure.
- */
-static int win32_extract_streams(struct wim_inode *inode,
- const wchar_t *path)
-{
- struct wim_lookup_table_entry *unnamed_lte;
- int ret;
-
- unnamed_lte = inode_unnamed_lte_resolved(inode);
- ret = win32_extract_stream(inode, path, NULL, unnamed_lte);
- if (ret)
- goto out;
- 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);
- if (ret)
- break;
- }
- }
-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.
- * @path_utf8: @path in UTF-8 for error messages only.
- *
- * Returns 0 on success; nonzero on failure.
- */
-static int win32_set_security_data(const struct wim_inode *inode,
- const wchar_t *path,
- const struct wim_security_data *sd)
-{
- SECURITY_INFORMATION securityInformation = DACL_SECURITY_INFORMATION |
- SACL_SECURITY_INFORMATION |
- OWNER_SECURITY_INFORMATION |
- GROUP_SECURITY_INFORMATION;
- if (!SetFileSecurityW(path, securityInformation,
- (PSECURITY_DESCRIPTOR)sd->descriptors[inode->i_security_id]))
- {
- DWORD err = GetLastError();
- ERROR("Can't set security descriptor on \"%ls\"", path);
- win32_error(err);
- return WIMLIB_ERR_WRITE;
- }
- return 0;
-}
-
-#else
+#ifndef __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 /* !__WIN32__ */
static int extract_directory(struct wim_dentry *dentry,
const char *output_path, bool is_root)
}
dir_exists:
ret = 0;
-#if !defined(__CYGWIN__) && !defined(__WIN32__)
+#ifndef __WIN32__
if (dentry) {
struct wimlib_unix_data unix_data;
ret = inode_get_unix_data(dentry->d_inode, &unix_data, NULL);
return ret;
}
+#ifndef __WIN32__
+static int unix_do_apply_dentry(const char *output_path,
+ size_t output_path_len,
+ struct wim_dentry *dentry,
+ struct apply_args *args)
+{
+ const struct wim_inode *inode = dentry->d_inode;
+
+ if (inode_is_symlink(inode))
+ return extract_symlink(dentry, args, output_path);
+ else if (inode_is_directory(inode))
+ return extract_directory((args->extract_flags &
+ WIMLIB_EXTRACT_FLAG_UNIX_DATA) ? dentry : NULL,
+ output_path, false);
+ else
+ return extract_regular_file(dentry, args, output_path);
+}
+
+static int unix_do_apply_dentry_timestamps(const char *output_path,
+ size_t output_path_len,
+ const struct wim_dentry *dentry,
+ struct apply_args *args)
+{
+ int ret;
+ const struct wim_inode *inode = dentry->d_inode;
+
+#ifdef HAVE_UTIMENSAT
+ /* Convert the WIM timestamps, which are accurate to 100 nanoseconds,
+ * into `struct timespec's for passing to utimensat(), which is accurate
+ * to 1 nanosecond. */
+
+ struct timespec ts[2];
+ ts[0] = wim_timestamp_to_timespec(inode->i_last_access_time);
+ ts[1] = wim_timestamp_to_timespec(inode->i_last_write_time);
+ ret = utimensat(AT_FDCWD, output_path, ts, AT_SYMLINK_NOFOLLOW);
+ if (ret)
+ ret = errno;
+#else
+ ret = ENOSYS;
+#endif
+
+ if (ret == ENOSYS) {
+ /* utimensat() not implemented or not available */
+ #ifdef HAVE_LUTIMES
+ /* Convert the WIM timestamps, which are accurate to 100
+ * nanoseconds, into `struct timeval's for passing to lutimes(),
+ * which is accurate to 1 microsecond. */
+ struct timeval tv[2];
+ tv[0] = wim_timestamp_to_timeval(inode->i_last_access_time);
+ tv[1] = wim_timestamp_to_timeval(inode->i_last_write_time);
+ ret = lutimes(output_path, tv);
+ if (ret)
+ ret = errno;
+ #endif
+ }
+
+ if (ret == ENOSYS) {
+ /* utimensat() and lutimes() both not implemented or not
+ * available */
+ #ifdef HAVE_UTIME
+ /* Convert the WIM timestamps, which are accurate to 100
+ * nanoseconds, into a `struct utimbuf's for passing to
+ * utime(), which is accurate to 1 second. */
+ struct utimbuf buf;
+ buf.actime = wim_timestamp_to_unix(inode->i_last_access_time);
+ buf.modtime = wim_timestamp_to_unix(inode->i_last_write_time);
+ ret = utime(output_path, &buf);
+ #endif
+ }
+ if (ret && args->num_utime_warnings < 10) {
+ WARNING_WITH_ERRNO("Failed to set timestamp on file `%s'",
+ output_path);
+ args->num_utime_warnings++;
+ }
+ return 0;
+}
+#endif /* !__WIN32__ */
+
/* Extracts a file, directory, or symbolic link from the WIM archive. */
static int apply_dentry_normal(struct wim_dentry *dentry, void *arg)
{
struct apply_args *args = arg;
- struct wim_inode *inode = dentry->d_inode;
size_t len;
char *output_path;
output_path[len + dentry->full_path_utf8_len] = '\0';
len += dentry->full_path_utf8_len;
}
-
-#if defined(__CYGWIN__) || defined(__WIN32__)
- char *utf16_path;
- size_t utf16_path_len;
- DWORD err;
- int ret;
- ret = utf8_to_utf16(output_path, len, &utf16_path, &utf16_path_len);
- if (ret)
- return ret;
-
- if (inode->i_nlink > 1 && inode->i_extracted_file != NULL) {
- /* Linked file, with another name already extracted. Create a
- * hard link. */
- DEBUG("Creating hard link \"%ls => %ls\"",
- (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 \"%ls => %ls\"",
- (const wchar_t*)utf16_path,
- (const wchar_t*)inode->i_extracted_file);
- ret = WIMLIB_ERR_LINK;
- win32_error(err);
- }
- } else {
- /* Create the file, directory, or reparse point, and extract the
- * data streams. */
- ret = win32_extract_streams(inode, (const wchar_t*)utf16_path);
- if (ret)
- goto out_free_utf16_path;
-
- /* Set security descriptor if present */
- if (inode->i_security_id != -1) {
- DEBUG("Setting security descriptor %d on %s",
- inode->i_security_id, output_path);
- ret = win32_set_security_data(inode,
- (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;
- }
- }
-out_free_utf16_path:
- FREE(utf16_path);
-out:
- return ret;
+#ifdef __WIN32__
+ return win32_do_apply_dentry(output_path, len, dentry, args);
#else
- if (inode_is_symlink(inode))
- return extract_symlink(dentry, args, output_path);
- else if (inode_is_directory(inode))
- return extract_directory((args->extract_flags &
- WIMLIB_EXTRACT_FLAG_UNIX_DATA) ? dentry : NULL,
- output_path, false);
- else
- return extract_regular_file(dentry, args, output_path);
+ return unix_do_apply_dentry(output_path, len, dentry, args);
#endif
}
+
/* Apply timestamps to an extracted file or directory */
static int apply_dentry_timestamps_normal(struct wim_dentry *dentry, void *arg)
{
struct apply_args *args = arg;
size_t len;
char *output_path;
- int ret;
- const struct wim_inode *inode = dentry->d_inode;
len = strlen(args->target);
if (dentry_is_root(dentry)) {
output_path[len + dentry->full_path_utf8_len] = '\0';
len += dentry->full_path_utf8_len;
}
-
-#if defined(__CYGWIN__) || defined(__WIN32__)
- /* Win32 */
- char *utf16_path;
- size_t utf16_path_len;
- DWORD err;
- HANDLE h;
- BOOL bret1, bret2;
-
- ret = utf8_to_utf16(output_path, len, &utf16_path, &utf16_path_len);
- if (ret)
- return ret;
-
- DEBUG("Opening \"%ls\" to set timestamps", utf16_path);
- h = CreateFileW(utf16_path, GENERIC_WRITE, FILE_SHARE_READ,
- NULL, OPEN_EXISTING,
- FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OPEN_REPARSE_POINT,
- NULL);
-
- if (h == INVALID_HANDLE_VALUE)
- err = GetLastError();
- FREE(utf16_path);
- 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};
-
- 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;
-fail:
- ERROR("Can't set timestamps on \"%s\"", output_path);
- win32_error(err);
- return WIMLIB_ERR_WRITE;
+#ifdef __WIN32__
+ return win32_do_apply_dentry_timestamps(output_path, len, dentry, args);
#else
- /* UNIX */
-
- /* Convert the WIM timestamps, which are accurate to 100 nanoseconds,
- * into struct timeval's. */
- struct timeval tv[2];
- wim_timestamp_to_timeval(inode->i_last_access_time, &tv[0]);
- wim_timestamp_to_timeval(inode->i_last_write_time, &tv[1]);
- #ifdef HAVE_LUTIMES
- ret = lutimes(output_path, tv);
- #else
- ret = -1;
- errno = ENOSYS;
- #endif
- if (ret != 0) {
- #ifdef HAVE_UTIME
- if (errno == ENOSYS) {
- struct utimbuf buf;
- buf.actime = wim_timestamp_to_unix(inode->i_last_access_time);
- buf.modtime = wim_timestamp_to_unix(inode->i_last_write_time);
- if (utime(output_path, &buf) == 0)
- return 0;
- }
- #endif
- if (errno != ENOSYS || args->num_lutimes_warnings < 10) {
- /*WARNING_WITH_ERRNO("Failed to set timestamp on file `%s',*/
- /*output_path");*/
- args->num_lutimes_warnings++;
- }
- }
- return 0;
+ return unix_do_apply_dentry_timestamps(output_path, len, dentry, args);
#endif
}
struct apply_args args;
const struct apply_operations *ops;
- args.w = w;
- args.target = target;
- args.extract_flags = extract_flags;
- args.num_lutimes_warnings = 0;
- args.stream_list = &stream_list;
- args.progress_func = progress_func;
+ args.w = w;
+ args.target = target;
+ args.extract_flags = extract_flags;
+ args.num_utime_warnings = 0;
+ args.stream_list = &stream_list;
+ args.progress_func = progress_func;
if (progress_func) {
args.progress.extract.wimfile_name = w->filename;
== (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK))
return WIMLIB_ERR_INVALID_PARAM;
-#if defined(__CYGWIN__) || defined(__WIN32__)
+#ifdef __WIN32__
if (extract_flags & WIMLIB_EXTRACT_FLAG_UNIX_DATA) {
ERROR("Extracting UNIX data is not supported on Windows");
return WIMLIB_ERR_INVALID_PARAM;
w->lookup_table = joined_tab;
}
+#ifdef __WIN32__
+ win32_acquire_restore_privileges();
+#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);
}
+#ifdef __WIN32__
+ win32_release_restore_privileges();
+#endif
if (extract_flags & (WIMLIB_EXTRACT_FLAG_SYMLINK |
WIMLIB_EXTRACT_FLAG_HARDLINK))
git://wimlib.net / wimlib / blobdiff