2 * file-io.c: File IO internal calls
5 * Dick Porter (dick@ximian.com)
6 * Gonzalo Paniagua Javier (gonzalo@ximian.com)
8 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
9 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
20 #ifdef HAVE_SYS_STAT_H
23 #ifdef HAVE_SYS_TYPES_H
24 #include <sys/types.h>
27 #include <mono/metadata/object.h>
28 #include <mono/io-layer/io-layer.h>
29 #include <mono/metadata/file-io.h>
30 #include <mono/metadata/exception.h>
31 #include <mono/metadata/appdomain.h>
32 #include <mono/metadata/marshal.h>
33 #include <mono/utils/strenc.h>
37 /* conversion functions */
39 static guint32 convert_mode(MonoFileMode mono_mode)
44 case FileMode_CreateNew:
53 case FileMode_OpenOrCreate:
56 case FileMode_Truncate:
57 mode=TRUNCATE_EXISTING;
63 g_warning("System.IO.FileMode has unknown value 0x%x",
72 static guint32 convert_access(MonoFileAccess mono_access)
80 case FileAccess_Write:
83 case FileAccess_ReadWrite:
84 access=GENERIC_READ|GENERIC_WRITE;
87 g_warning("System.IO.FileAccess has unknown value 0x%x",
96 static guint32 convert_share(MonoFileShare mono_share)
100 if (mono_share & FileShare_Read) {
101 share |= FILE_SHARE_READ;
103 if (mono_share & FileShare_Write) {
104 share |= FILE_SHARE_WRITE;
106 if (mono_share & FileShare_Delete) {
107 share |= FILE_SHARE_DELETE;
110 if (mono_share & ~(FileShare_Read|FileShare_Write|FileShare_Delete)) {
111 g_warning("System.IO.FileShare has unknown value 0x%x",
121 static guint32 convert_stdhandle(guint32 fd)
127 stdhandle=STD_INPUT_HANDLE;
130 stdhandle=STD_OUTPUT_HANDLE;
133 stdhandle=STD_ERROR_HANDLE;
136 g_warning("unknown standard file descriptor %d", fd);
137 stdhandle=STD_INPUT_HANDLE;
144 static guint32 convert_seekorigin(MonoSeekOrigin origin)
149 case SeekOrigin_Begin:
150 w32origin=FILE_BEGIN;
152 case SeekOrigin_Current:
153 w32origin=FILE_CURRENT;
159 g_warning("System.IO.SeekOrigin has unknown value 0x%x",
162 w32origin=FILE_CURRENT;
168 static gint64 convert_filetime (const FILETIME *filetime)
170 guint64 ticks = filetime->dwHighDateTime;
172 ticks += filetime->dwLowDateTime;
173 return (gint64)ticks;
176 static void convert_win32_file_attribute_data (const WIN32_FILE_ATTRIBUTE_DATA *data, const gunichar2 *name, MonoIOStat *stat)
180 stat->attributes = data->dwFileAttributes;
181 stat->creation_time = convert_filetime (&data->ftCreationTime);
182 stat->last_access_time = convert_filetime (&data->ftLastAccessTime);
183 stat->last_write_time = convert_filetime (&data->ftLastWriteTime);
184 stat->length = ((gint64)data->nFileSizeHigh << 32) | data->nFileSizeLow;
190 MONO_STRUCT_SETREF (stat, name, mono_string_new_utf16 (mono_domain_get (), name, len));
193 /* Managed file attributes have nearly but not quite the same values
194 * as the w32 equivalents.
196 static guint32 convert_attrs(MonoFileAttributes attrs)
198 if(attrs & FileAttributes_Encrypted) {
199 attrs |= FILE_ATTRIBUTE_ENCRYPTED;
206 * On Win32, GetFileAttributes|Ex () seems to try opening the file,
207 * which might lead to sharing violation errors, whereas FindFirstFile
208 * always succeeds. These 2 wrappers resort to FindFirstFile if
209 * GetFileAttributes|Ex () has failed.
212 get_file_attributes (const gunichar2 *path)
215 WIN32_FIND_DATA find_data;
219 res = GetFileAttributes (path);
223 error = GetLastError ();
225 if (error != ERROR_SHARING_VIOLATION)
228 find_handle = FindFirstFile (path, &find_data);
230 if (find_handle == INVALID_HANDLE_VALUE)
233 FindClose (find_handle);
235 return find_data.dwFileAttributes;
239 get_file_attributes_ex (const gunichar2 *path, WIN32_FILE_ATTRIBUTE_DATA *data)
242 WIN32_FIND_DATA find_data;
246 res = GetFileAttributesEx (path, GetFileExInfoStandard, data);
250 error = GetLastError ();
252 if (error != ERROR_SHARING_VIOLATION)
255 find_handle = FindFirstFile (path, &find_data);
257 if (find_handle == INVALID_HANDLE_VALUE)
260 FindClose (find_handle);
262 data->dwFileAttributes = find_data.dwFileAttributes;
263 data->ftCreationTime = find_data.ftCreationTime;
264 data->ftLastAccessTime = find_data.ftLastAccessTime;
265 data->ftLastWriteTime = find_data.ftLastWriteTime;
266 data->nFileSizeHigh = find_data.nFileSizeHigh;
267 data->nFileSizeLow = find_data.nFileSizeLow;
272 /* System.IO.MonoIO internal calls */
275 ves_icall_System_IO_MonoIO_CreateDirectory (MonoString *path, gint32 *error)
281 *error=ERROR_SUCCESS;
283 ret=CreateDirectory (mono_string_chars (path), NULL);
285 *error=GetLastError ();
292 ves_icall_System_IO_MonoIO_RemoveDirectory (MonoString *path, gint32 *error)
298 *error=ERROR_SUCCESS;
300 ret=RemoveDirectory (mono_string_chars (path));
302 *error=GetLastError ();
309 ves_icall_System_IO_MonoIO_GetFileSystemEntries (MonoString *path,
310 MonoString *path_with_pattern,
311 gint attrs, gint mask,
317 WIN32_FIND_DATA data;
320 gchar *utf8_path, *utf8_result, *full_name;
324 *error = ERROR_SUCCESS;
326 domain = mono_domain_get ();
327 mask = convert_attrs (mask);
329 find_handle = FindFirstFile (mono_string_chars (path_with_pattern),
331 if (find_handle == INVALID_HANDLE_VALUE) {
332 gint32 find_error = GetLastError ();
334 if (find_error == ERROR_FILE_NOT_FOUND) {
335 /* No files, so just return an empty array */
336 result = mono_array_new (domain,
337 mono_defaults.string_class,
347 utf8_path = mono_string_to_utf8 (path); /*If this raises there is not memory to release*/
348 names = g_ptr_array_new ();
351 if ((data.cFileName[0] == '.' && data.cFileName[1] == 0) ||
352 (data.cFileName[0] == '.' && data.cFileName[1] == '.' && data.cFileName[2] == 0)) {
356 if ((data.dwFileAttributes & mask) == attrs) {
357 utf8_result = g_utf16_to_utf8 (data.cFileName, -1, NULL, NULL, NULL);
358 if (utf8_result == NULL) {
362 full_name = g_build_filename (utf8_path, utf8_result, NULL);
363 g_ptr_array_add (names, full_name);
365 g_free (utf8_result);
367 } while(FindNextFile (find_handle, &data));
369 if (FindClose (find_handle) == FALSE) {
370 *error = GetLastError ();
373 result = mono_array_new (domain, mono_defaults.string_class, names->len);
374 for (i = 0; i < names->len; i++) {
375 mono_array_setref (result, i, mono_string_new (domain, g_ptr_array_index (names, i)));
379 for (i = 0; i < names->len; i++) {
380 g_free (g_ptr_array_index (names, i));
382 g_ptr_array_free (names, TRUE);
395 incremental_find_check_match (IncrementalFind *handle, WIN32_FIND_DATA *data, MonoString **result)
400 if ((data->cFileName[0] == '.' && data->cFileName[1] == 0) || (data->cFileName[0] == '.' && data->cFileName[1] == '.' && data->cFileName[2] == 0))
403 utf8_result = g_utf16_to_utf8 (data->cFileName, -1, NULL, NULL, NULL);
404 if (utf8_result == NULL)
407 full_name = g_build_filename (handle->utf8_path, utf8_result, NULL);
408 g_free (utf8_result);
409 *result = mono_string_new (mono_domain_get (), full_name);
416 ves_icall_System_IO_MonoIO_FindFirst (MonoString *path,
417 MonoString *path_with_pattern,
418 gint32 *result_attr, gint32 *error,
421 WIN32_FIND_DATA data;
423 IncrementalFind *ifh;
426 *error = ERROR_SUCCESS;
428 find_handle = FindFirstFile (mono_string_chars (path_with_pattern), &data);
430 if (find_handle == INVALID_HANDLE_VALUE) {
431 gint32 find_error = GetLastError ();
434 if (find_error == ERROR_FILE_NOT_FOUND)
441 ifh = g_new (IncrementalFind, 1);
442 ifh->find_handle = find_handle;
443 ifh->utf8_path = mono_string_to_utf8 (path);
444 ifh->domain = mono_domain_get ();
447 while (incremental_find_check_match (ifh, &data, &result) == 0){
448 if (FindNextFile (find_handle, &data) == FALSE){
449 int e = GetLastError ();
450 if (e != ERROR_NO_MORE_FILES)
455 *result_attr = data.dwFileAttributes;
461 ves_icall_System_IO_MonoIO_FindNext (gpointer handle, gint32 *result_attr, gint32 *error)
463 IncrementalFind *ifh = handle;
464 WIN32_FIND_DATA data;
467 error = ERROR_SUCCESS;
469 if (FindNextFile (ifh->find_handle, &data) == FALSE){
470 int e = GetLastError ();
471 if (e != ERROR_NO_MORE_FILES)
475 } while (incremental_find_check_match (ifh, &data, &result) == 0);
477 *result_attr = data.dwFileAttributes;
482 ves_icall_System_IO_MonoIO_FindClose (gpointer handle)
484 IncrementalFind *ifh = handle;
487 if (FindClose (ifh->find_handle) == FALSE){
488 error = GetLastError ();
490 error = ERROR_SUCCESS;
491 g_free (ifh->utf8_path);
498 ves_icall_System_IO_MonoIO_GetCurrentDirectory (gint32 *error)
506 len = MAX_PATH + 1; /*FIXME this is too smal under most unix systems.*/
507 buf = g_new (gunichar2, len);
509 *error=ERROR_SUCCESS;
512 res_len = GetCurrentDirectory (len, buf);
513 if (res_len > len) { /*buf is too small.*/
514 int old_res_len = res_len;
516 buf = g_new (gunichar2, res_len);
517 res_len = GetCurrentDirectory (res_len, buf) == old_res_len;
525 result = mono_string_new_utf16 (mono_domain_get (), buf, len);
527 *error=GetLastError ();
535 ves_icall_System_IO_MonoIO_SetCurrentDirectory (MonoString *path,
542 *error=ERROR_SUCCESS;
544 ret=SetCurrentDirectory (mono_string_chars (path));
546 *error=GetLastError ();
553 ves_icall_System_IO_MonoIO_MoveFile (MonoString *path, MonoString *dest,
560 *error=ERROR_SUCCESS;
562 ret=MoveFile (mono_string_chars (path), mono_string_chars (dest));
564 *error=GetLastError ();
571 ves_icall_System_IO_MonoIO_ReplaceFile (MonoString *sourceFileName, MonoString *destinationFileName,
572 MonoString *destinationBackupFileName, MonoBoolean ignoreMetadataErrors,
576 gunichar2 *utf16_sourceFileName = NULL, *utf16_destinationFileName = NULL, *utf16_destinationBackupFileName = NULL;
577 guint32 replaceFlags = REPLACEFILE_WRITE_THROUGH;
582 utf16_sourceFileName = mono_string_chars (sourceFileName);
583 if (destinationFileName)
584 utf16_destinationFileName = mono_string_chars (destinationFileName);
585 if (destinationBackupFileName)
586 utf16_destinationBackupFileName = mono_string_chars (destinationBackupFileName);
588 *error = ERROR_SUCCESS;
589 if (ignoreMetadataErrors)
590 replaceFlags |= REPLACEFILE_IGNORE_MERGE_ERRORS;
592 ret = ReplaceFile (utf16_destinationFileName, utf16_sourceFileName, utf16_destinationBackupFileName,
593 replaceFlags, NULL, NULL);
595 *error = GetLastError ();
601 ves_icall_System_IO_MonoIO_CopyFile (MonoString *path, MonoString *dest,
602 MonoBoolean overwrite, gint32 *error)
608 *error=ERROR_SUCCESS;
610 ret=CopyFile (mono_string_chars (path), mono_string_chars (dest), !overwrite);
612 *error=GetLastError ();
619 ves_icall_System_IO_MonoIO_DeleteFile (MonoString *path, gint32 *error)
625 *error=ERROR_SUCCESS;
627 ret=DeleteFile (mono_string_chars (path));
629 *error=GetLastError ();
636 ves_icall_System_IO_MonoIO_GetFileAttributes (MonoString *path, gint32 *error)
642 *error=ERROR_SUCCESS;
644 ret=get_file_attributes (mono_string_chars (path));
647 * The definition of INVALID_FILE_ATTRIBUTES in the cygwin win32
648 * headers is wrong, hence this temporary workaround.
650 * http://cygwin.com/ml/cygwin/2003-09/msg01771.html
653 /* if(ret==INVALID_FILE_ATTRIBUTES) { */
654 *error=GetLastError ();
661 ves_icall_System_IO_MonoIO_SetFileAttributes (MonoString *path, gint32 attrs,
668 *error=ERROR_SUCCESS;
670 ret=SetFileAttributes (mono_string_chars (path),
671 convert_attrs (attrs));
673 *error=GetLastError ();
680 ves_icall_System_IO_MonoIO_GetFileType (HANDLE handle, gint32 *error)
686 *error=ERROR_SUCCESS;
688 ret=GetFileType (handle);
689 if(ret==FILE_TYPE_UNKNOWN) {
690 /* Not necessarily an error, but the caller will have
691 * to decide based on the error value.
693 *error=GetLastError ();
700 ves_icall_System_IO_MonoIO_GetFileStat (MonoString *path, MonoIOStat *stat,
704 WIN32_FILE_ATTRIBUTE_DATA data;
708 *error=ERROR_SUCCESS;
710 result = get_file_attributes_ex (mono_string_chars (path), &data);
713 convert_win32_file_attribute_data (&data,
714 mono_string_chars (path),
717 *error=GetLastError ();
718 memset (stat, 0, sizeof (MonoIOStat));
725 ves_icall_System_IO_MonoIO_Open (MonoString *filename, gint32 mode,
726 gint32 access_mode, gint32 share, gint32 options,
730 int attributes, attrs;
731 gunichar2 *chars = mono_string_chars (filename);
735 *error=ERROR_SUCCESS;
738 if (options & FileOptions_Encrypted)
739 attributes = FILE_ATTRIBUTE_ENCRYPTED;
741 attributes = FILE_ATTRIBUTE_NORMAL;
742 if (options & FileOptions_DeleteOnClose)
743 attributes |= FILE_FLAG_DELETE_ON_CLOSE;
744 if (options & FileOptions_SequentialScan)
745 attributes |= FILE_FLAG_SEQUENTIAL_SCAN;
746 if (options & FileOptions_RandomAccess)
747 attributes |= FILE_FLAG_RANDOM_ACCESS;
749 if (options & FileOptions_Temporary)
750 attributes |= FILE_ATTRIBUTE_TEMPORARY;
752 /* Not sure if we should set FILE_FLAG_OVERLAPPED, how does this mix with the "Async" bool here? */
753 if (options & FileOptions_Asynchronous)
754 attributes |= FILE_FLAG_OVERLAPPED;
756 if (options & FileOptions_WriteThrough)
757 attributes |= FILE_FLAG_WRITE_THROUGH;
759 attributes = FILE_ATTRIBUTE_NORMAL;
761 /* If we're opening a directory we need to set the extra flag
763 attrs = get_file_attributes (chars);
764 if (attrs != INVALID_FILE_ATTRIBUTES) {
765 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
766 attributes |= FILE_FLAG_BACKUP_SEMANTICS;
770 ret=CreateFile (chars, convert_access (access_mode),
771 convert_share (share), NULL, convert_mode (mode),
773 if(ret==INVALID_HANDLE_VALUE) {
774 *error=GetLastError ();
781 ves_icall_System_IO_MonoIO_Close (HANDLE handle, gint32 *error)
787 *error=ERROR_SUCCESS;
789 ret=CloseHandle (handle);
791 *error=GetLastError ();
798 ves_icall_System_IO_MonoIO_Read (HANDLE handle, MonoArray *dest,
799 gint32 dest_offset, gint32 count,
808 *error=ERROR_SUCCESS;
810 if (dest_offset + count > mono_array_length (dest))
813 buffer = mono_array_addr (dest, guchar, dest_offset);
814 result = ReadFile (handle, buffer, count, &n, NULL);
817 *error=GetLastError ();
825 ves_icall_System_IO_MonoIO_Write (HANDLE handle, MonoArray *src,
826 gint32 src_offset, gint32 count,
835 *error=ERROR_SUCCESS;
837 if (src_offset + count > mono_array_length (src))
840 buffer = mono_array_addr (src, guchar, src_offset);
841 result = WriteFile (handle, buffer, count, &n, NULL);
844 *error=GetLastError ();
852 ves_icall_System_IO_MonoIO_Seek (HANDLE handle, gint64 offset, gint32 origin,
859 *error=ERROR_SUCCESS;
861 offset_hi = offset >> 32;
862 offset = SetFilePointer (handle, (gint32) (offset & 0xFFFFFFFF), &offset_hi,
863 convert_seekorigin (origin));
865 if(offset==INVALID_SET_FILE_POINTER) {
866 *error=GetLastError ();
869 return offset | ((gint64)offset_hi << 32);
873 ves_icall_System_IO_MonoIO_Flush (HANDLE handle, gint32 *error)
879 *error=ERROR_SUCCESS;
881 ret=FlushFileBuffers (handle);
883 *error=GetLastError ();
890 ves_icall_System_IO_MonoIO_GetLength (HANDLE handle, gint32 *error)
897 *error=ERROR_SUCCESS;
899 length = GetFileSize (handle, &length_hi);
900 if(length==INVALID_FILE_SIZE) {
901 *error=GetLastError ();
904 return length | ((gint64)length_hi << 32);
908 ves_icall_System_IO_MonoIO_SetLength (HANDLE handle, gint64 length,
911 gint64 offset, offset_set;
918 *error=ERROR_SUCCESS;
920 /* save file pointer */
923 offset = SetFilePointer (handle, 0, &offset_hi, FILE_CURRENT);
924 if(offset==INVALID_SET_FILE_POINTER) {
925 *error=GetLastError ();
929 /* extend or truncate */
931 length_hi = length >> 32;
932 offset_set=SetFilePointer (handle, length & 0xFFFFFFFF, &length_hi,
934 if(offset_set==INVALID_SET_FILE_POINTER) {
935 *error=GetLastError ();
939 result = SetEndOfFile (handle);
941 *error=GetLastError ();
945 /* restore file pointer */
947 offset_set=SetFilePointer (handle, offset & 0xFFFFFFFF, &offset_hi,
949 if(offset_set==INVALID_SET_FILE_POINTER) {
950 *error=GetLastError ();
958 ves_icall_System_IO_MonoIO_SetFileTime (HANDLE handle, gint64 creation_time,
959 gint64 last_access_time,
960 gint64 last_write_time, gint32 *error)
963 const FILETIME *creation_filetime;
964 const FILETIME *last_access_filetime;
965 const FILETIME *last_write_filetime;
969 *error=ERROR_SUCCESS;
971 if (creation_time < 0)
972 creation_filetime = NULL;
974 creation_filetime = (FILETIME *)&creation_time;
976 if (last_access_time < 0)
977 last_access_filetime = NULL;
979 last_access_filetime = (FILETIME *)&last_access_time;
981 if (last_write_time < 0)
982 last_write_filetime = NULL;
984 last_write_filetime = (FILETIME *)&last_write_time;
986 ret=SetFileTime (handle, creation_filetime, last_access_filetime, last_write_filetime);
988 *error=GetLastError ();
995 ves_icall_System_IO_MonoIO_get_ConsoleOutput ()
999 return GetStdHandle (STD_OUTPUT_HANDLE);
1003 ves_icall_System_IO_MonoIO_get_ConsoleInput ()
1005 MONO_ARCH_SAVE_REGS;
1007 return GetStdHandle (STD_INPUT_HANDLE);
1011 ves_icall_System_IO_MonoIO_get_ConsoleError ()
1013 MONO_ARCH_SAVE_REGS;
1015 return GetStdHandle (STD_ERROR_HANDLE);
1019 ves_icall_System_IO_MonoIO_CreatePipe (HANDLE *read_handle,
1020 HANDLE *write_handle)
1022 SECURITY_ATTRIBUTES attr;
1025 MONO_ARCH_SAVE_REGS;
1027 attr.nLength=sizeof(SECURITY_ATTRIBUTES);
1028 attr.bInheritHandle=TRUE;
1029 attr.lpSecurityDescriptor=NULL;
1031 ret=CreatePipe (read_handle, write_handle, &attr, 0);
1033 /* FIXME: throw an exception? */
1040 MonoBoolean ves_icall_System_IO_MonoIO_DuplicateHandle (HANDLE source_process_handle,
1041 HANDLE source_handle, HANDLE target_process_handle, HANDLE *target_handle,
1042 gint32 access, gint32 inherit, gint32 options)
1044 /* This is only used on Windows */
1047 MONO_ARCH_SAVE_REGS;
1049 ret=DuplicateHandle (source_process_handle, source_handle, target_process_handle, target_handle, access, inherit, options);
1051 /* FIXME: throw an exception? */
1059 ves_icall_System_IO_MonoIO_get_VolumeSeparatorChar ()
1061 #if defined (TARGET_WIN32)
1062 return (gunichar2) ':'; /* colon */
1064 return (gunichar2) '/'; /* forward slash */
1069 ves_icall_System_IO_MonoIO_get_DirectorySeparatorChar ()
1071 #if defined (TARGET_WIN32)
1072 return (gunichar2) '\\'; /* backslash */
1074 return (gunichar2) '/'; /* forward slash */
1079 ves_icall_System_IO_MonoIO_get_AltDirectorySeparatorChar ()
1081 #if defined (TARGET_WIN32)
1082 return (gunichar2) '/'; /* forward slash */
1084 return (gunichar2) '/'; /* slash, same as DirectorySeparatorChar */
1089 ves_icall_System_IO_MonoIO_get_PathSeparator ()
1091 #if defined (TARGET_WIN32)
1092 return (gunichar2) ';'; /* semicolon */
1094 return (gunichar2) ':'; /* colon */
1098 static const gunichar2
1099 invalid_path_chars [] = {
1100 #if defined (TARGET_WIN32)
1101 0x0022, /* double quote, which seems allowed in MS.NET but should be rejected */
1102 0x003c, /* less than */
1103 0x003e, /* greater than */
1120 ves_icall_System_IO_MonoIO_get_InvalidPathChars ()
1126 MONO_ARCH_SAVE_REGS;
1128 domain = mono_domain_get ();
1129 n = sizeof (invalid_path_chars) / sizeof (gunichar2);
1130 chars = mono_array_new (domain, mono_defaults.char_class, n);
1132 for (i = 0; i < n; ++ i)
1133 mono_array_set (chars, gunichar2, i, invalid_path_chars [i]);
1139 ves_icall_System_IO_MonoIO_GetTempPath (MonoString **mono_name)
1144 name=g_new0 (gunichar2, 256);
1146 ret=GetTempPath (256, name);
1148 /* Buffer was too short. Try again... */
1150 name=g_new0 (gunichar2, ret+2); /* include the terminator */
1151 ret=GetTempPath (ret, name);
1156 g_message ("%s: Temp path is [%s] (len %d)", __func__, name, ret);
1159 mono_gc_wbarrier_generic_store ((gpointer) mono_name,
1160 (MonoObject*) mono_string_new_utf16 (mono_domain_get (), name, ret));
1168 void ves_icall_System_IO_MonoIO_Lock (HANDLE handle, gint64 position,
1169 gint64 length, gint32 *error)
1173 *error=ERROR_SUCCESS;
1175 ret=LockFile (handle, position & 0xFFFFFFFF, position >> 32,
1176 length & 0xFFFFFFFF, length >> 32);
1178 *error = GetLastError ();
1182 void ves_icall_System_IO_MonoIO_Unlock (HANDLE handle, gint64 position,
1183 gint64 length, gint32 *error)
1187 *error=ERROR_SUCCESS;
1189 ret=UnlockFile (handle, position & 0xFFFFFFFF, position >> 32,
1190 length & 0xFFFFFFFF, length >> 32);
1192 *error = GetLastError ();