#include <errno.h>
+static const char *access_denied_msg =
+" 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";
+
#ifdef ENABLE_ERROR_MESSAGES
void
win32_error(u32 err_code)
err = GetLastError();
}
}
- ERROR("Win32 API: Failed to read security descriptor of \"%ls\"",
- path_utf16);
- win32_error(err);
- return WIMLIB_ERR_READ;
+
+ if (err == ERROR_ACCESS_DENIED) {
+ WARNING("Failed to read security descriptor of \"%ls\": "
+ "Access denied!\n%s", path_utf16, access_denied_msg);
+ return 0;
+ } else {
+ ERROR("Win32 API: Failed to read security descriptor of \"%ls\"",
+ path_utf16);
+ win32_error(err);
+ return WIMLIB_ERR_READ;
+ }
}
/* Reads the directory entries of directory using a Win32 API and recursively
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'))))
+ if (!(dat.cFileName[0] == cpu_to_le16(L'.') &&
+ (dat.cFileName[1] == cpu_to_le16(L'\0') ||
+ (dat.cFileName[1] == cpu_to_le16(L'.') &&
+ dat.cFileName[2] == cpu_to_le16(L'\0')))))
{
struct wim_dentry *child;
- char *mbs_name;
+ mbchar *mbs_name;
size_t mbs_name_nbytes;
ret = utf16le_to_mbs(dat.cFileName,
wcslen(dat.cFileName) * sizeof(wchar_t),
if (ret)
goto out_find_close;
- char name[strlen(root_disk_path) + 1 + mbs_name_nbytes + 1];
+ mbchar name[strlen(root_disk_path) + 1 + mbs_name_nbytes + 1];
sprintf(name, "%s/%s", root_disk_path, mbs_name);
FREE(mbs_name);
ret = win32_build_dentry_tree(&child, name, lookup_table,
* for the reparse point unless an entry already exists for
* the exact same data stream.
*
- * @path: External path to the parse point (UTF-8). Used for error messages
- * only.
+ * @path: External path to the reparse point. Used for error messages only.
*
* Returns 0 on success; nonzero on failure. */
static int
win32_capture_reparse_point(HANDLE hFile,
struct wim_inode *inode,
struct wim_lookup_table *lookup_table,
- const char *path)
+ const mbchar *path)
{
/* "Reparse point data, including the tag and optional GUID,
* cannot exceed 16 kilobytes." - MSDN */
DWORD bytesReturned;
if (!DeviceIoControl(hFile, FSCTL_GET_REPARSE_POINT,
- NULL, 0, reparse_point_buf,
- sizeof(reparse_point_buf), &bytesReturned, NULL))
+ NULL, /* "Not used with this operation; set to NULL" */
+ 0, /* "Not used with this operation; set to 0" */
+ reparse_point_buf, /* "A pointer to a buffer that
+ receives the reparse point data */
+ sizeof(reparse_point_buf), /* "The size of the output
+ buffer, in bytes */
+ &bytesReturned,
+ NULL))
{
DWORD err = GetLastError();
ERROR("Win32 API: Failed to get reparse data of \"%s\"", path);
}
inode->i_reparse_tag = le32_to_cpu(*(u32*)reparse_point_buf);
return inode_add_ads_with_data(inode, "",
- (const u8*)reparse_point_buf + 8,
+ reparse_point_buf + 8,
bytesReturned - 8, lookup_table);
}
u8 hash[SHA1_HASH_SIZE];
struct wim_lookup_table_entry *lte;
int ret;
- wchar_t *p, *colon;
+ wchar_t *stream_name, *colon;
+ size_t stream_name_nchars;
bool is_named_stream;
wchar_t *spath;
size_t spath_nchars;
DWORD err;
+ size_t spath_buf_nbytes;
+ const wchar_t *relpath_prefix;
+ const wchar_t *colonchar;
/* The stream name should be returned as :NAME:TYPE */
- p = dat->cStreamName;
- if (*p != L':')
+ stream_name = dat->cStreamName;
+ if (*stream_name != L':')
goto out_invalid_stream_name;
- p += 1;
- colon = wcschr(p, L':');
+ stream_name += 1;
+ colon = wcschr(stream_name, L':');
if (colon == NULL)
goto out_invalid_stream_name;
goto out;
}
- is_named_stream = (p != colon);
+ *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. */
- char *mbs_stream_name;
- size_t mbs_stream_name_nbytes;
- ret = utf16le_to_mbs(p,
- (colon - p) * sizeof(wchar_t),
- &mbs_stream_name,
- &mbs_stream_name_nbytes);
- if (ret)
- goto out;
- ads_entry = inode_add_ads(inode, mbs_stream_name);
- FREE(mbs_stream_name);
+ ads_entry = inode_add_ads_utf16le(inode, stream_name,
+ stream_name_nchars * 2);
if (!ads_entry) {
ret = WIMLIB_ERR_NOMEM;
goto out;
}
}
- /* Create a UTF-16 string @spath that gives the filename, then a colon,
- * then the stream name. Or, if it's an unnamed stream, just the
+ /* 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. */
- *colon = '\0';
+ * 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_utf16_nchars;
- if (is_named_stream)
- spath_nchars += colon - p + 1;
-
- spath = MALLOC((spath_nchars + 1) * sizeof(wchar_t));
- memcpy(spath, path_utf16, path_utf16_nchars * sizeof(wchar_t));
+ relpath_prefix = L"";
+ colonchar = L"";
if (is_named_stream) {
- spath[path_utf16_nchars] = L':';
- memcpy(&spath[path_utf16_nchars + 1], p, (colon - p) * sizeof(wchar_t));
+ spath_nchars += 1 + stream_name_nchars;
+ colonchar = L":";
+ if (path_utf16_nchars == 1 &&
+ path_utf16[0] != cpu_to_le16('/') &&
+ path_utf16[0] != cpu_to_le16('\\'))
+ {
+ spath_nchars += 2;
+ relpath_prefix = L"./";
+ }
}
- spath[spath_nchars] = L'\0';
+
+ spath_buf_nbytes = (spath_nchars + 1) * sizeof(wchar_t);
+ spath = MALLOC(spath_buf_nbytes);
+
+ swprintf(spath, spath_buf_nbytes, L"%ls%ls%ls%ls",
+ relpath_prefix, path_utf16, colonchar, stream_name);
ret = win32_sha1sum(spath, hash);
if (ret) {
err = GetLastError();
ERROR("Win32 API: Failed to read \"%ls\" to calculate SHA1sum",
- path_utf16);
+ spath);
win32_error(err);
goto out_free_spath;
}
{
return 0;
} else {
- ERROR("Win32 API: Failed to look up data streams of \"%ls\"",
- path_utf16);
- win32_error(err);
- return WIMLIB_ERR_READ;
+ if (err == ERROR_ACCESS_DENIED) {
+ WARNING("Failed to look up data streams of \"%ls\": "
+ "Access denied!\n%s", path_utf16,
+ access_denied_msg);
+ return 0;
+ } else {
+ ERROR("Win32 API: Failed to look up data streams of \"%ls\"",
+ path_utf16);
+ win32_error(err);
+ return WIMLIB_ERR_READ;
+ }
}
}
do {
/* Win32 version of capturing a directory tree */
int
win32_build_dentry_tree(struct wim_dentry **root_ret,
- const char *root_disk_path,
+ const mbchar *root_disk_path,
struct wim_lookup_table *lookup_table,
struct wim_security_data *sd,
const struct capture_config *config,
if (stream_name_utf16) {
/* Named stream. Create a buffer that contains the UTF-16LE
- * string [./]@path:@stream_name_utf16. This is needed to
+ * 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
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'\\') {
+ 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 {
if (!ret)
goto fail_win32;
- resolved_path = MALLOC(ret + 1);
+ resolved_path = MALLOC(ret);
if (!resolved_path)
goto fail;
ret = GetFullPathNameA(path, ret, resolved_path, NULL);
strcpy(buf, "Unknown");
return buf;
}
+
+/* rename() on Windows fails if the destination file exists. Fix it. */
+int
+rename_replacement(const char *oldpath, const char *newpath)
+{
+ if (MoveFileExA(oldpath, newpath, MOVEFILE_REPLACE_EXISTING)) {
+ return 0;
+ } else {
+ /* As usual, the possible error values are not documented */
+ DWORD err = GetLastError();
+ ERROR("MoveFileExA(): Can't rename \"%s\" to \"%s\"",
+ oldpath, newpath);
+ win32_error(err);
+ errno = 0;
+ return -1;
+ }
+}