posix_errno_t efile_set_cwd(const efile_path_t *path) {
const WCHAR *path_start;
ASSERT_PATH_FORMAT(path);
/* We have to use _wchdir since that's the only function that updates the
* per-drive working directory, but it naively assumes that all paths
* starting with \\ are UNC paths, so we have to skip the long-path prefix.
*
* _wchdir doesn't handle long-prefixed UNC paths either so we hand those
* to SetCurrentDirectoryW instead. The per-drive working directory is
* irrelevant for such paths anyway. */
if(!IS_LONG_UNC_PATH(PATH_LENGTH(path), path->data)) {
path_start = (WCHAR*)path->data + LP_PREFIX_LENGTH;
if(_wchdir(path_start)) {
return windows_to_posix_errno(GetLastError());
}
} else {
if(!SetCurrentDirectoryW((WCHAR*)path->data)) {
return windows_to_posix_errno(GetLastError());
}
}
return 0;
}
posix_errno_t efile_altname(ErlNifEnv *env, const efile_path_t *path, ERL_NIF_TERM *result) {
ErlNifBinary result_bin;
ASSERT_PATH_FORMAT(path);
if(is_path_root(path)) {
/* Root paths can't be queried so we'll just return them as they are. */
if(!enif_alloc_binary(path->size, &result_bin)) {
return ENOMEM;
}
sys_memcpy(result_bin.data, path->data, path->size);
} else {
WIN32_FIND_DATAW data;
HANDLE handle;
WCHAR *name_buffer;
int name_length;
/* Reject path wildcards. */
if(wcspbrk(&((const WCHAR*)path->data)[LP_PREFIX_LENGTH], L"?*")) {
return ENOENT;
}
handle = FindFirstFileW((const WCHAR*)path->data, &data);
if(handle == INVALID_HANDLE_VALUE) {
return windows_to_posix_errno(GetLastError());
}
FindClose(handle);
name_length = wcslen(data.cAlternateFileName);
if(name_length > 0) {
name_buffer = data.cAlternateFileName;
} else {
name_length = wcslen(data.cFileName);
name_buffer = data.cFileName;
}
/* Include NUL-terminator; it will be removed after normalization. */
name_length += 1;
if(!enif_alloc_binary(name_length * sizeof(WCHAR), &result_bin)) {
return ENOMEM;
}
sys_memcpy(result_bin.data, name_buffer, name_length * sizeof(WCHAR));
}
if(!normalize_path_result(&result_bin)) {
enif_release_binary(&result_bin);
return ENOMEM;
}
(*result) = enif_make_binary(env, &result_bin);
return 0;
}
static Sint64 internal_sync_io(efile_win_t *w, io_op_t operation,
SysIOVec *iov, int iovlen, OVERLAPPED *overlapped) {
Sint64 bytes_processed = 0;
for(;;) {
DWORD block_bytes_processed, last_error;
BOOL succeeded;
if(iovlen < 1) {
return bytes_processed;
}
succeeded = operation(w->handle, iov->iov_base, iov->iov_len,
&block_bytes_processed, overlapped);
last_error = GetLastError();
if(!succeeded && (last_error != ERROR_HANDLE_EOF)) {
w->common.posix_errno = windows_to_posix_errno(last_error);
return -1;
} else if(block_bytes_processed == 0) {
/* EOF */
return bytes_processed;
}
if(overlapped != NULL) {
shift_overlapped(overlapped, block_bytes_processed);
}
shift_iov(&iov, &iovlen, block_bytes_processed);
bytes_processed += block_bytes_processed;
}
}
posix_errno_t efile_read_link(ErlNifEnv *env, const efile_path_t *path, ERL_NIF_TERM *result) {
posix_errno_t posix_errno;
ErlNifBinary result_bin;
DWORD attributes;
ASSERT_PATH_FORMAT(path);
attributes = GetFileAttributesW((WCHAR*)path->data);
if(attributes == INVALID_FILE_ATTRIBUTES) {
return windows_to_posix_errno(GetLastError());
} else if(!(attributes & FILE_ATTRIBUTE_REPARSE_POINT)) {
return EINVAL;
}
if(!is_name_surrogate(path)) {
return EINVAL;
}
posix_errno = internal_read_link(path, &result_bin);
if(posix_errno == 0) {
if(!normalize_path_result(&result_bin)) {
enif_release_binary(&result_bin);
return ENOMEM;
}
(*result) = enif_make_binary(env, &result_bin);
}
return posix_errno;
}
static posix_errno_t internal_read_link(const efile_path_t *path, efile_path_t *result) {
DWORD required_length, actual_length;
HANDLE link_handle;
DWORD last_error;
link_handle = CreateFileW((WCHAR*)path->data, GENERIC_READ,
FILE_SHARE_FLAGS, NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
last_error = GetLastError();
if(link_handle == INVALID_HANDLE_VALUE) {
return windows_to_posix_errno(last_error);
}
required_length = GetFinalPathNameByHandleW(link_handle, NULL, 0, 0);
last_error = GetLastError();
if(required_length <= 0) {
CloseHandle(link_handle);
return windows_to_posix_errno(last_error);
}
/* Unlike many other path functions (eg. GetFullPathNameW), this one
* includes the NUL terminator in its required length. */
if(!enif_alloc_binary(required_length * sizeof(WCHAR), result)) {
CloseHandle(link_handle);
return ENOMEM;
}
actual_length = GetFinalPathNameByHandleW(link_handle,
(WCHAR*)result->data, required_length, 0);
last_error = GetLastError();
CloseHandle(link_handle);
if(actual_length == 0 || actual_length >= required_length) {
enif_release_binary(result);
return windows_to_posix_errno(last_error);
}
/* GetFinalPathNameByHandle always prepends with "\\?\" and NUL-terminates,
* so we never have to touch-up the resulting path. */
ASSERT_PATH_FORMAT(result);
return 0;
}
posix_errno_t efile_set_time(const efile_path_t *path, Sint64 a_time, Sint64 m_time, Sint64 c_time) {
FILETIME accessed, modified, created;
DWORD last_error, attributes;
HANDLE handle;
attributes = GetFileAttributesW((WCHAR*)path->data);
if(attributes == INVALID_FILE_ATTRIBUTES) {
return windows_to_posix_errno(GetLastError());
}
/* If the file is read-only, we have to make it temporarily writable while
* setting new metadata. */
if(attributes & FILE_ATTRIBUTE_READONLY) {
DWORD without_readonly = attributes & ~FILE_ATTRIBUTE_READONLY;
if(!SetFileAttributesW((WCHAR*)path->data, without_readonly)) {
return windows_to_posix_errno(GetLastError());
}
}
EPOCH_TO_FILETIME(modified, m_time);
EPOCH_TO_FILETIME(accessed, a_time);
EPOCH_TO_FILETIME(created, c_time);
handle = CreateFileW((WCHAR*)path->data, GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_FLAGS, NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
last_error = GetLastError();
if(handle != INVALID_HANDLE_VALUE) {
if(SetFileTime(handle, &created, &accessed, &modified)) {
last_error = ERROR_SUCCESS;
} else {
last_error = GetLastError();
}
CloseHandle(handle);
}
if(attributes & FILE_ATTRIBUTE_READONLY) {
SetFileAttributesW((WCHAR*)path->data, attributes);
}
return windows_to_posix_errno(last_error);
}
posix_errno_t efile_make_dir(const efile_path_t *path) {
ASSERT_PATH_FORMAT(path);
if(!CreateDirectoryW((WCHAR*)path->data, NULL)) {
return windows_to_posix_errno(GetLastError());
}
return 0;
}
int efile_truncate(efile_data_t *d) {
efile_win_t *w = (efile_win_t*)d;
if(!SetEndOfFile(w->handle)) {
w->common.posix_errno = windows_to_posix_errno(GetLastError());
return 0;
}
return 1;
}
posix_errno_t efile_set_permissions(const efile_path_t *path, Uint32 permissions) {
DWORD attributes = GetFileAttributesW((WCHAR*)path->data);
if(attributes == INVALID_FILE_ATTRIBUTES) {
return windows_to_posix_errno(GetLastError());
}
if(permissions & _S_IWRITE) {
attributes &= ~FILE_ATTRIBUTE_READONLY;
} else {
attributes |= FILE_ATTRIBUTE_READONLY;
}
if(SetFileAttributesW((WCHAR*)path->data, attributes)) {
return 0;
}
return windows_to_posix_errno(GetLastError());
}
posix_errno_t efile_make_hard_link(const efile_path_t *existing_path, const efile_path_t *new_path) {
ASSERT_PATH_FORMAT(existing_path);
ASSERT_PATH_FORMAT(new_path);
if(!CreateHardLinkW((WCHAR*)new_path->data, (WCHAR*)existing_path->data, NULL)) {
return windows_to_posix_errno(GetLastError());
}
return 0;
}
posix_errno_t efile_list_dir(ErlNifEnv *env, const efile_path_t *path, ERL_NIF_TERM *result) {
ERL_NIF_TERM list_head;
WIN32_FIND_DATAW data;
HANDLE search_handle;
WCHAR *search_path;
DWORD last_error;
ASSERT_PATH_FORMAT(path);
search_path = enif_alloc(path->size + 2 * sizeof(WCHAR));
if(search_path == NULL) {
return ENOMEM;
}
sys_memcpy(search_path, path->data, path->size);
search_path[PATH_LENGTH(path) + 0] = L'\\';
search_path[PATH_LENGTH(path) + 1] = L'*';
search_path[PATH_LENGTH(path) + 2] = L'\0';
search_handle = FindFirstFileW(search_path, &data);
last_error = GetLastError();
enif_free(search_path);
if(search_handle == INVALID_HANDLE_VALUE) {
return windows_to_posix_errno(last_error);
}
list_head = enif_make_list(env, 0);
do {
int name_length = wcslen(data.cFileName);
if(!is_ignored_name(name_length, data.cFileName)) {
unsigned char *name_bytes;
ERL_NIF_TERM name_term;
size_t name_size;
name_size = name_length * sizeof(WCHAR);
name_bytes = enif_make_new_binary(env, name_size, &name_term);
sys_memcpy(name_bytes, data.cFileName, name_size);
list_head = enif_make_list_cell(env, name_term, list_head);
}
} while(FindNextFileW(search_handle, &data));
FindClose(search_handle);
(*result) = list_head;
return 0;
}
int efile_sync(efile_data_t *d, int data_only) {
efile_win_t *w = (efile_win_t*)d;
/* Windows doesn't support data-only syncing. */
(void)data_only;
if(!FlushFileBuffers(w->handle)) {
w->common.posix_errno = windows_to_posix_errno(GetLastError());
return 0;
}
return 1;
}
posix_errno_t efile_del_dir(const efile_path_t *path) {
ASSERT_PATH_FORMAT(path);
if(!RemoveDirectoryW((WCHAR*)path->data)) {
DWORD last_error = GetLastError();
if(last_error == ERROR_DIRECTORY) {
return ENOTDIR;
}
return windows_to_posix_errno(last_error);
}
return 0;
}
posix_errno_t efile_set_cwd(const efile_path_t *path) {
const WCHAR *path_start;
ASSERT_PATH_FORMAT(path);
/* We have to use _wchdir since that's the only function that updates the
* per-drive working directory, but it naively assumes that all paths
* starting with \\ are UNC paths, so we have to skip the \\?\-prefix. */
path_start = (WCHAR*)path->data + LP_PREFIX_LENGTH;
if(_wchdir(path_start)) {
return windows_to_posix_errno(GetLastError());
}
return 0;
}
int efile_close(efile_data_t *d) {
efile_win_t *w = (efile_win_t*)d;
HANDLE handle;
ASSERT(erts_atomic32_read_nob(&d->state) == EFILE_STATE_CLOSED);
ASSERT(w->handle != INVALID_HANDLE_VALUE);
handle = w->handle;
w->handle = INVALID_HANDLE_VALUE;
if(!CloseHandle(handle)) {
w->common.posix_errno = windows_to_posix_errno(GetLastError());
return 0;
}
return 1;
}
posix_errno_t efile_make_soft_link(const efile_path_t *existing_path, const efile_path_t *new_path) {
DWORD link_flags;
ASSERT_PATH_FORMAT(existing_path);
ASSERT_PATH_FORMAT(new_path);
if(has_file_attributes(existing_path, FILE_ATTRIBUTE_DIRECTORY)) {
link_flags = SYMBOLIC_LINK_FLAG_DIRECTORY;
} else {
link_flags = 0;
}
if(!CreateSymbolicLinkW((WCHAR*)new_path->data, (WCHAR*)existing_path->data, link_flags)) {
return windows_to_posix_errno(GetLastError());
}
return 0;
}
int efile_close(efile_data_t *d, posix_errno_t *error) {
efile_win_t *w = (efile_win_t*)d;
HANDLE handle;
ASSERT(enif_thread_type() == ERL_NIF_THR_DIRTY_IO_SCHEDULER);
ASSERT(erts_atomic32_read_nob(&d->state) == EFILE_STATE_CLOSED);
ASSERT(w->handle != INVALID_HANDLE_VALUE);
handle = w->handle;
w->handle = INVALID_HANDLE_VALUE;
enif_release_resource(d);
if(!CloseHandle(handle)) {
*error = windows_to_posix_errno(GetLastError());
return 0;
}
return 1;
}
posix_errno_t efile_del_file(const efile_path_t *path) {
ASSERT_PATH_FORMAT(path);
if(!DeleteFileW((WCHAR*)path->data)) {
DWORD last_error = GetLastError();
switch(last_error) {
case ERROR_INVALID_NAME:
/* Attempted to delete a device or similar. */
return EACCES;
case ERROR_ACCESS_DENIED:
/* Windows NT reports removing a directory as EACCES instead of
* EPERM. */
if(has_file_attributes(path, FILE_ATTRIBUTE_DIRECTORY)) {
return EPERM;
}
break;
}
return windows_to_posix_errno(last_error);
}
return 0;
}
int efile_seek(efile_data_t *d, enum efile_seek_t seek, Sint64 offset, Sint64 *new_position) {
efile_win_t *w = (efile_win_t*)d;
LARGE_INTEGER large_offset, large_new_position;
DWORD whence;
switch(seek) {
case EFILE_SEEK_BOF: whence = FILE_BEGIN; break;
case EFILE_SEEK_CUR: whence = FILE_CURRENT; break;
case EFILE_SEEK_EOF: whence = FILE_END; break;
default: ERTS_INTERNAL_ERROR("Invalid seek parameter");
}
large_offset.QuadPart = offset;
if(!SetFilePointerEx(w->handle, large_offset, &large_new_position, whence)) {
w->common.posix_errno = windows_to_posix_errno(GetLastError());
return 0;
}
(*new_position) = large_new_position.QuadPart;
return 1;
}
posix_errno_t efile_open(const efile_path_t *path, enum efile_modes_t modes,
ErlNifResourceType *nif_type, efile_data_t **d) {
DWORD attributes, access_flags, open_mode;
HANDLE handle;
ASSERT_PATH_FORMAT(path);
access_flags = 0;
open_mode = 0;
if(modes & EFILE_MODE_READ && !(modes & EFILE_MODE_WRITE)) {
access_flags = GENERIC_READ;
open_mode = OPEN_EXISTING;
} else if(modes & EFILE_MODE_WRITE && !(modes & EFILE_MODE_READ)) {
access_flags = GENERIC_WRITE;
open_mode = CREATE_ALWAYS;
} else if(modes & EFILE_MODE_READ_WRITE) {
access_flags = GENERIC_READ | GENERIC_WRITE;
open_mode = OPEN_ALWAYS;
} else {
return EINVAL;
}
if(modes & EFILE_MODE_APPEND) {
access_flags |= FILE_APPEND_DATA;
open_mode = OPEN_ALWAYS;
}
if(modes & EFILE_MODE_EXCLUSIVE) {
open_mode = CREATE_NEW;
}
if(modes & EFILE_MODE_SYNC) {
attributes = FILE_FLAG_WRITE_THROUGH;
} else {
attributes = FILE_ATTRIBUTE_NORMAL;
}
handle = CreateFileW((WCHAR*)path->data, access_flags,
FILE_SHARE_FLAGS, NULL, open_mode, attributes, NULL);
if(handle != INVALID_HANDLE_VALUE) {
efile_win_t *w;
w = (efile_win_t*)enif_alloc_resource(nif_type, sizeof(efile_win_t));
w->handle = handle;
EFILE_INIT_RESOURCE(&w->common, modes);
(*d) = &w->common;
return 0;
} else {
DWORD last_error = GetLastError();
/* Rewrite all failures on directories to EISDIR to match the old
* driver. */
if(has_file_attributes(path, FILE_ATTRIBUTE_DIRECTORY)) {
return EISDIR;
}
return windows_to_posix_errno(last_error);
}
}
posix_errno_t efile_rename(const efile_path_t *old_path, const efile_path_t *new_path) {
BOOL old_is_directory, new_is_directory;
DWORD move_flags, last_error;
ASSERT_PATH_FORMAT(old_path);
ASSERT_PATH_FORMAT(new_path);
move_flags = MOVEFILE_COPY_ALLOWED | MOVEFILE_WRITE_THROUGH;
if(MoveFileExW((WCHAR*)old_path->data, (WCHAR*)new_path->data, move_flags)) {
return 0;
}
last_error = GetLastError();
old_is_directory = has_file_attributes(old_path, FILE_ATTRIBUTE_DIRECTORY);
new_is_directory = has_file_attributes(new_path, FILE_ATTRIBUTE_DIRECTORY);
switch(last_error) {
case ERROR_SHARING_VIOLATION:
case ERROR_ACCESS_DENIED:
if(old_is_directory) {
BOOL moved_into_itself;
moved_into_itself = (old_path->size <= new_path->size) &&
!_wcsnicmp((WCHAR*)old_path->data, (WCHAR*)new_path->data,
PATH_LENGTH(old_path));
if(moved_into_itself) {
return EINVAL;
} else if(is_path_root(old_path)) {
return EINVAL;
}
/* Renaming a directory across volumes needs to be rewritten as
* EXDEV so that the caller can respond by simulating it with
* copy/delete operations.
*
* Files are handled through MOVEFILE_COPY_ALLOWED. */
if(!has_same_mount_point(old_path, new_path)) {
return EXDEV;
}
}
break;
case ERROR_PATH_NOT_FOUND:
case ERROR_FILE_NOT_FOUND:
return ENOENT;
case ERROR_ALREADY_EXISTS:
case ERROR_FILE_EXISTS:
if(old_is_directory && !new_is_directory) {
return ENOTDIR;
} else if(!old_is_directory && new_is_directory) {
return EISDIR;
} else if(old_is_directory && new_is_directory) {
/* This will fail if the destination isn't empty. */
if(RemoveDirectoryW((WCHAR*)new_path->data)) {
return efile_rename(old_path, new_path);
}
return EEXIST;
} else if(!old_is_directory && !new_is_directory) {
/* This is pretty iffy; the public documentation says that the
* operation may EACCES on some systems when either file is open,
* which gives us room to use MOVEFILE_REPLACE_EXISTING and be done
* with it, but the old implementation simulated Unix semantics and
* there's a lot of code that relies on that.
*
* The simulation renames the destination to a scratch name to get
* around the fact that it's impossible to open (and by extension
* rename) a file that's been deleted while open. It has a few
* drawbacks though;
*
* 1) It's not atomic as there's a small window where there's no
* file at all on the destination path.
* 2) It will confuse applications that subscribe to folder
* changes.
* 3) It will fail if we lack general permission to write in the
* same folder. */
WCHAR *swap_path = enif_alloc(new_path->size + sizeof(WCHAR) * 64);
if(swap_path == NULL) {
return ENOMEM;
} else {
static LONGLONG unique_counter = 0;
WCHAR *swap_path_end;
/* We swap in the same folder as the destination to be
* reasonably sure that it's on the same volume. Note that
* we're avoiding GetTempFileNameW as it will fail on long
* paths. */
sys_memcpy(swap_path, (WCHAR*)new_path->data, new_path->size);
swap_path_end = swap_path + PATH_LENGTH(new_path);
while(!IS_SLASH(*swap_path_end)) {
ASSERT(swap_path_end > swap_path);
swap_path_end--;
}
StringCchPrintfW(&swap_path_end[1], 64, L"erl-%lx-%llx.tmp",
GetCurrentProcessId(), unique_counter);
InterlockedIncrement64(&unique_counter);
}
if(MoveFileExW((WCHAR*)new_path->data, swap_path, MOVEFILE_REPLACE_EXISTING)) {
if(MoveFileExW((WCHAR*)old_path->data, (WCHAR*)new_path->data, move_flags)) {
last_error = ERROR_SUCCESS;
DeleteFileW(swap_path);
} else {
last_error = GetLastError();
MoveFileW(swap_path, (WCHAR*)new_path->data);
}
} else {
last_error = GetLastError();
DeleteFileW(swap_path);
}
enif_free(swap_path);
return windows_to_posix_errno(last_error);
}
return EEXIST;
}
return windows_to_posix_errno(last_error);
}
posix_errno_t efile_read_info(const efile_path_t *path, int follow_links, efile_fileinfo_t *result) {
BY_HANDLE_FILE_INFORMATION native_file_info;
DWORD attributes;
int is_link;
sys_memset(&native_file_info, 0, sizeof(native_file_info));
is_link = 0;
attributes = GetFileAttributesW((WCHAR*)path->data);
if(attributes == INVALID_FILE_ATTRIBUTES) {
DWORD last_error = GetLastError();
/* Querying a network share root fails with ERROR_BAD_NETPATH, so we'll
* fake it as a directory just like local roots. */
if(!is_path_root(path) || last_error != ERROR_BAD_NETPATH) {
return windows_to_posix_errno(last_error);
}
attributes = FILE_ATTRIBUTE_DIRECTORY;
} else if(is_path_root(path)) {
/* Local (or mounted) roots can be queried with GetFileAttributesW but
* lack support for GetFileInformationByHandle, so we'll skip that
* part. */
} else {
HANDLE handle;
if(attributes & FILE_ATTRIBUTE_REPARSE_POINT) {
is_link = is_name_surrogate(path);
}
if(follow_links && is_link) {
posix_errno_t posix_errno;
efile_path_t resolved_path;
posix_errno = internal_read_link(path, &resolved_path);
if(posix_errno != 0) {
return posix_errno;
}
return efile_read_info(&resolved_path, 0, result);
}
handle = CreateFileW((const WCHAR*)path->data, GENERIC_READ,
FILE_SHARE_FLAGS, NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS,
NULL);
/* The old driver never cared whether this succeeded. */
if(handle != INVALID_HANDLE_VALUE) {
GetFileInformationByHandle(handle, &native_file_info);
CloseHandle(handle);
}
FILETIME_TO_EPOCH(result->m_time, native_file_info.ftLastWriteTime);
FILETIME_TO_EPOCH(result->a_time, native_file_info.ftLastAccessTime);
FILETIME_TO_EPOCH(result->c_time, native_file_info.ftCreationTime);
if(result->m_time == -EPOCH_DIFFERENCE) {
/* Default to 1970 just like the old driver. */
result->m_time = 0;
}
if(result->a_time == -EPOCH_DIFFERENCE) {
result->a_time = result->m_time;
}
if(result->c_time == -EPOCH_DIFFERENCE) {
result->c_time = result->m_time;
}
}
if(is_link) {
result->type = EFILE_FILETYPE_SYMLINK;
/* This should be _S_IFLNK, but the old driver always set
* non-directories to _S_IFREG. */
result->mode |= _S_IFREG;
} else if(attributes & FILE_ATTRIBUTE_DIRECTORY) {
result->type = EFILE_FILETYPE_DIRECTORY;
result->mode |= _S_IFDIR | _S_IEXEC;
} else {
if(is_executable_file(path)) {
result->mode |= _S_IEXEC;
}
result->type = EFILE_FILETYPE_REGULAR;
result->mode |= _S_IFREG;
}
if(!(attributes & FILE_ATTRIBUTE_READONLY)) {
result->access = EFILE_ACCESS_READ | EFILE_ACCESS_WRITE;
result->mode |= _S_IREAD | _S_IWRITE;
} else {
result->access = EFILE_ACCESS_READ;
result->mode |= _S_IREAD;
}
/* Propagate user mode-bits to group/other fields */
result->mode |= (result->mode & 0700) >> 3;
result->mode |= (result->mode & 0700) >> 6;
result->size =
((Uint64)native_file_info.nFileSizeHigh << 32ull) |
(Uint64)native_file_info.nFileSizeLow;
result->links = MAX(1, native_file_info.nNumberOfLinks);
result->major_device = get_drive_number(path);
result->minor_device = 0;
result->inode = 0;
result->uid = 0;
result->gid = 0;
return 0;
}
