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);
+ if (err != ERROR_FILE_NOT_FOUND) {
+ WARNING("Failed to open \"%ls\" to get file "
+ "and volume IDs", path);
+ win32_error(err);
+ }
return WIMLIB_ERR_OPEN;
}
* 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. */
+ * 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)
+win32_capture_maybe_rpfix_target(wchar_t *target, u16 *target_nbytes_p,
+ u64 capture_root_ino, u64 capture_root_dev,
+ u32 rptag)
{
- size_t target_nchars= *target_nchars_p;
+ u16 target_nchars = *target_nbytes_p / 2;
size_t stripped_chars;
wchar_t *orig_target;
+ int ret;
- if (target_nchars == 0)
- /* Invalid reparse point (empty target) */
+ ret = parse_substitute_name(target, *target_nbytes_p, rptag);
+ if (ret < 0)
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;
- }
+ stripped_chars = ret;
target[target_nchars] = L'\0';
orig_target = target;
- target = fixup_symlink(target + stripped_chars, capture_root_ino, capture_root_dev);
+ target = capture_fixup_absolute_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;
+ *target_nbytes_p = (target_nchars + stripped_chars) * sizeof(wchar_t);
DEBUG("Fixed reparse point (new target: \"%ls\")", orig_target);
if (stripped_chars == 6)
return RP_FIXED_FULLPATH;
return RP_FIXED_ABSPATH;
}
-static enum rp_status
-win32_try_capture_rpfix(char *rpbuf, DWORD *rpbuflen_p,
+/* Returns: `enum rp_status' value on success; negative WIMLIB_ERR_* value on
+ * failure. */
+static int
+win32_capture_try_rpfix(u8 *rpbuf, u16 *rpbuflen_p,
u64 capture_root_ino, u64 capture_root_dev)
{
- 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;
+ struct reparse_data rpdata;
+ DWORD rpbuflen;
+ int ret;
+ enum rp_status rp_status;
- if (status == RP_FIXED_FULLPATH) {
+ rpbuflen = *rpbuflen_p;
+ ret = parse_reparse_data(rpbuf, rpbuflen, &rpdata);
+ if (ret)
+ return -ret;
+
+ rp_status = win32_capture_maybe_rpfix_target(rpdata.substitute_name,
+ &rpdata.substitute_name_nbytes,
+ capture_root_ino,
+ capture_root_dev,
+ le32_to_cpu(*(u32*)rpbuf));
+ if (rp_status & RP_FIXED) {
+ wimlib_assert(rpdata.substitute_name_nbytes % 2 == 0);
+ utf16lechar substitute_name_copy[rpdata.substitute_name_nbytes / 2];
+ wmemcpy(substitute_name_copy, rpdata.substitute_name,
+ rpdata.substitute_name_nbytes / 2);
+ rpdata.substitute_name = substitute_name_copy;
+ rpdata.print_name = substitute_name_copy;
+ rpdata.print_name_nbytes = rpdata.substitute_name_nbytes;
+ if (rp_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;
+ rpdata.print_name += 4;
+ rpdata.print_name_nbytes -= 8;
}
- 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;
+ ret = make_reparse_buffer(&rpdata, rpbuf);
+ if (ret == 0)
+ ret = rp_status;
+ else
+ ret = -ret;
+ } else {
+ ret = rp_status;
+ }
+ return ret;
}
+/*
+ * Loads the reparse point data from a reparse point into memory, optionally
+ * fixing the targets of absolute symbolic links and junction points to be
+ * relative to the root of capture.
+ *
+ * @hFile: Open handle to the reparse point.
+ * @path: Path to the reparse point. Used for error messages only.
+ * @params: Additional parameters, including whether to do reparse point fixups
+ * or not.
+ * @rpbuf: Buffer of length at least REPARSE_POINT_MAX_SIZE bytes into which
+ * the reparse point buffer will be loaded.
+ * @rpbuflen_ret: On success, the length of the reparse point buffer in bytes
+ * is written to this location.
+ *
+ * Returns:
+ * On success, returns an `enum rp_status' value that indicates if and/or
+ * how the reparse point fixup was done.
+ *
+ * On failure, returns a negative value that is a negated WIMLIB_ERR_*
+ * code.
+ */
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)
+ u8 *rpbuf, u16 *rpbuflen_ret)
{
DWORD bytesReturned;
u32 reparse_tag;
- enum rp_status status;
+ int ret;
+ u16 rpbuflen;
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
+ rpbuf, /* "A pointer to a buffer that
receives the reparse point data */
REPARSE_POINT_MAX_SIZE, /* "The size of the output
buffer, in bytes */
win32_error(err);
return -WIMLIB_ERR_READ;
}
- if (bytesReturned < 8) {
+ if (bytesReturned < 8 || bytesReturned > REPARSE_POINT_MAX_SIZE) {
ERROR("Reparse data on \"%ls\" is invalid", path);
- return -WIMLIB_ERR_READ;
+ return -WIMLIB_ERR_INVALID_REPARSE_DATA;
}
- reparse_tag = le32_to_cpu(*(u32*)reparse_data);
+ rpbuflen = bytesReturned;
+ reparse_tag = le32_to_cpu(*(u32*)rpbuf);
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))
{
/* Try doing reparse point fixup */
- status = win32_try_capture_rpfix(reparse_data,
- &bytesReturned,
- params->capture_root_ino,
- params->capture_root_dev);
+ ret = win32_capture_try_rpfix(rpbuf,
+ &rpbuflen,
+ params->capture_root_ino,
+ params->capture_root_dev);
} else {
- status = RP_NOT_FIXED;
+ ret = RP_NOT_FIXED;
}
- *reparse_data_len_ret = bytesReturned;
- return status;
+ *rpbuflen_ret = rpbuflen;
+ return ret;
}
static DWORD WINAPI
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;
+ WARNING("Failed to look up data streams "
+ "of \"%ls\": Access denied!\n%ls",
+ path, capture_access_denied_msg);
+ return 0;
} else {
ERROR("Failed to look up data streams "
"of \"%ls\"", path);
DWORD err;
u64 file_size;
int ret;
- void *reparse_data;
- size_t reparse_data_len;
+ u8 *rpbuf;
+ u16 rpbuflen;
u16 not_rpfixed;
if (exclude_path(path, path_num_chars, params->config, true)) {
}
if (file_info.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
- reparse_data = alloca(REPARSE_POINT_MAX_SIZE);
+ rpbuf = alloca(REPARSE_POINT_MAX_SIZE);
ret = win32_get_reparse_data(hFile, path, params,
- reparse_data, &reparse_data_len);
+ rpbuf, &rpbuflen);
if (ret < 0) {
/* WIMLIB_ERR_* (inverted) */
ret = -ret;
/* 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,
+ inode->i_reparse_tag = le32_to_cpu(*(u32*)rpbuf);
+ ret = inode_set_unnamed_stream(inode, rpbuf + 8, rpbuflen - 8,
params->lookup_table);
} else if (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY) {
/* Directory (not a reparse point) --- recurse to children */
return ret;
}
+static int
+win32_extract_try_rpfix(u8 *rpbuf,
+ const wchar_t *extract_root_realpath,
+ unsigned extract_root_realpath_nchars)
+{
+ struct reparse_data rpdata;
+ wchar_t *target;
+ size_t target_nchars;
+ size_t stripped_nchars;
+ wchar_t *stripped_target;
+ wchar_t stripped_target_nchars;
+ int ret;
+
+ utf16lechar *new_target;
+ utf16lechar *new_print_name;
+ size_t new_target_nchars;
+ size_t new_print_name_nchars;
+ utf16lechar *p;
+
+ ret = parse_reparse_data(rpbuf, 8 + le16_to_cpu(*(u16*)(rpbuf + 4)),
+ &rpdata);
+ if (ret)
+ return ret;
+
+ if (extract_root_realpath[0] == L'\0' ||
+ extract_root_realpath[1] != L':' ||
+ extract_root_realpath[2] != L'\\')
+ {
+ ERROR("Can't understand full path format \"%ls\". "
+ "Try turning reparse point fixups off...",
+ extract_root_realpath);
+ return WIMLIB_ERR_REPARSE_POINT_FIXUP_FAILED;
+ }
+
+ ret = parse_substitute_name(rpdata.substitute_name,
+ rpdata.substitute_name_nbytes,
+ rpdata.rptag);
+ if (ret < 0)
+ return 0;
+ stripped_nchars = ret;
+ target = rpdata.substitute_name;
+ target_nchars = rpdata.substitute_name_nbytes / sizeof(utf16lechar);
+ stripped_target = target + 6;
+ stripped_target_nchars = target_nchars - stripped_nchars;
+
+ new_target = alloca((6 + extract_root_realpath_nchars +
+ stripped_target_nchars) * sizeof(utf16lechar));
+
+ p = new_target;
+ if (stripped_nchars == 6) {
+ /* Include \??\ prefix if it was present before */
+ wmemcpy(p, L"\\??\\", 4);
+ p += 4;
+ }
+
+ /* Print name excludes the \??\ if present. */
+ new_print_name = p;
+ if (target_nchars - stripped_target_nchars != 0) {
+ /* Get drive letter from real path to extract root, if a drive
+ * letter was present before. */
+ *p++ = extract_root_realpath[0];
+ *p++ = extract_root_realpath[1];
+ }
+ /* Copy the rest of the extract root */
+ wmemcpy(p, extract_root_realpath + 2, extract_root_realpath_nchars - 2);
+ p += extract_root_realpath_nchars - 2;
+
+ /* Append the stripped target */
+ wmemcpy(p, stripped_target, stripped_target_nchars);
+ p += stripped_target_nchars;
+ new_target_nchars = p - new_target;
+ new_print_name_nchars = p - new_print_name;
+
+ if (new_target_nchars * sizeof(utf16lechar) >= REPARSE_POINT_MAX_SIZE ||
+ new_print_name_nchars * sizeof(utf16lechar) >= REPARSE_POINT_MAX_SIZE)
+ {
+ ERROR("Path names too long to do reparse point fixup!");
+ return WIMLIB_ERR_REPARSE_POINT_FIXUP_FAILED;
+ }
+ rpdata.substitute_name = new_target;
+ rpdata.substitute_name_nbytes = new_target_nchars * sizeof(utf16lechar);
+ rpdata.print_name = new_print_name;
+ rpdata.print_name_nbytes = new_print_name_nchars * sizeof(utf16lechar);
+ return make_reparse_buffer(&rpdata, rpbuf);
+}
+
/* 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_inode *inode,
const struct wim_lookup_table_entry *lte,
- const wchar_t *path)
+ const wchar_t *path,
+ const struct apply_args *args)
{
int ret;
- u8 *buf;
- size_t len;
+ u8 rpbuf[REPARSE_POINT_MAX_SIZE];
+ DWORD bytesReturned;
- 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;
- }
+ DEBUG("Setting reparse data on \"%ls\"", path);
- /* 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);
+ ret = wim_inode_get_reparse_data(inode, rpbuf);
if (ret)
return ret;
- *(u32*)(buf + 0) = cpu_to_le32(reparse_tag);
- *(u16*)(buf + 4) = cpu_to_le16(len);
- *(u16*)(buf + 6) = 0;
+
+ if (args->extract_flags & WIMLIB_EXTRACT_FLAG_RPFIX &&
+ (inode->i_reparse_tag == WIM_IO_REPARSE_TAG_SYMLINK ||
+ inode->i_reparse_tag == WIM_IO_REPARSE_TAG_MOUNT_POINT) &&
+ !inode->i_not_rpfixed)
+ {
+ ret = win32_extract_try_rpfix(rpbuf,
+ args->target_realpath,
+ args->target_realpath_len);
+ if (ret)
+ return WIMLIB_ERR_REPARSE_POINT_FIXUP_FAILED;
+ }
/* Set the reparse data on the open file using the
* FSCTL_SET_REPARSE_POINT ioctl.
*
* "Not used with this operation; set to NULL."
*/
- DWORD bytesReturned;
- if (!DeviceIoControl(h, FSCTL_SET_REPARSE_POINT, buf, len + 8,
+ if (!DeviceIoControl(h, FSCTL_SET_REPARSE_POINT, rpbuf,
+ 8 + le16_to_cpu(*(u16*)(rpbuf + 4)),
NULL, 0,
&bytesReturned /* lpBytesReturned */,
NULL /* lpOverlapped */))
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)
+ else if (inode->i_reparse_tag == WIM_IO_REPARSE_TAG_SYMLINK ||
+ inode->i_reparse_tag == WIM_IO_REPARSE_TAG_MOUNT_POINT)
return WIMLIB_ERR_LINK;
else
return WIMLIB_ERR_WRITE;
/* 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 (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY &&
+ !path_is_root_of_drive(path)) {
if (!CreateDirectoryW(path, NULL)) {
err = GetLastError();
- switch (err) {
- case ERROR_ALREADY_EXISTS:
- break;
- case ERROR_ACCESS_DENIED:
- if (path_is_root_of_drive(path))
- break;
- /* Fall through */
- default:
+ if (err != ERROR_ALREADY_EXISTS) {
ERROR("Failed to create directory \"%ls\"",
path);
win32_error(err);
* 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);
+ ret = win32_set_reparse_data(h, inode,
+ lte, stream_path,
+ args);
if (ret)
return ret;
} else {
NULL);
if (h == INVALID_HANDLE_VALUE) {
err = GetLastError();
- if (err == ERROR_PRIVILEGE_NOT_HELD &&
+ 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
git://wimlib.net / wimlib / blobdiff