1 /*
2 * File handling functions
3 *
4 * Copyright 1993 John Burton
5 * Copyright 1996, 2004 Alexandre Julliard
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
20 */
21
22 #include "config.h"
23 #include "wine/port.h"
24
25 #include <stdarg.h>
26 #include <stdio.h>
27 #include <errno.h>
28 #ifdef HAVE_SYS_STAT_H
29 # include <sys/stat.h>
30 #endif
31
32 #define NONAMELESSUNION
33 #define NONAMELESSSTRUCT
34 #include "winerror.h"
35 #include "ntstatus.h"
36 #define WIN32_NO_STATUS
37 #include "windef.h"
38 #include "winbase.h"
39 #include "winternl.h"
40 #include "winioctl.h"
41 #include "wincon.h"
42 #include "wine/winbase16.h"
43 #include "kernel_private.h"
44
45 #include "wine/exception.h"
46 #include "wine/unicode.h"
47 #include "wine/debug.h"
48
49 WINE_DEFAULT_DEBUG_CHANNEL(file);
50
51 HANDLE dos_handles[DOS_TABLE_SIZE];
52
53 /* info structure for FindFirstFile handle */
54 typedef struct
55 {
56 DWORD magic; /* magic number */
57 HANDLE handle; /* handle to directory */
58 CRITICAL_SECTION cs; /* crit section protecting this structure */
59 FINDEX_SEARCH_OPS search_op; /* Flags passed to FindFirst. */
60 UNICODE_STRING mask; /* file mask */
61 UNICODE_STRING path; /* NT path used to open the directory */
62 BOOL is_root; /* is directory the root of the drive? */
63 UINT data_pos; /* current position in dir data */
64 UINT data_len; /* length of dir data */
65 BYTE data[8192]; /* directory data */
66 } FIND_FIRST_INFO;
67
68 #define FIND_FIRST_MAGIC 0xc0ffee11
69
70 static BOOL oem_file_apis;
71
72 static const WCHAR wildcardsW[] = { '*','?',0 };
73
74 /***********************************************************************
75 * create_file_OF
76 *
77 * Wrapper for CreateFile that takes OF_* mode flags.
78 */
79 static HANDLE create_file_OF( LPCSTR path, INT mode )
80 {
81 DWORD access, sharing, creation;
82
83 if (mode & OF_CREATE)
84 {
85 creation = CREATE_ALWAYS;
86 access = GENERIC_READ | GENERIC_WRITE;
87 }
88 else
89 {
90 creation = OPEN_EXISTING;
91 switch(mode & 0x03)
92 {
93 case OF_READ: access = GENERIC_READ; break;
94 case OF_WRITE: access = GENERIC_WRITE; break;
95 case OF_READWRITE: access = GENERIC_READ | GENERIC_WRITE; break;
96 default: access = 0; break;
97 }
98 }
99
100 switch(mode & 0x70)
101 {
102 case OF_SHARE_EXCLUSIVE: sharing = 0; break;
103 case OF_SHARE_DENY_WRITE: sharing = FILE_SHARE_READ; break;
104 case OF_SHARE_DENY_READ: sharing = FILE_SHARE_WRITE; break;
105 case OF_SHARE_DENY_NONE:
106 case OF_SHARE_COMPAT:
107 default: sharing = FILE_SHARE_READ | FILE_SHARE_WRITE; break;
108 }
109 return CreateFileA( path, access, sharing, NULL, creation, FILE_ATTRIBUTE_NORMAL, 0 );
110 }
111
112
113 /***********************************************************************
114 * check_dir_symlink
115 *
116 * Check if a dir symlink should be returned by FindNextFile.
117 */
118 static BOOL check_dir_symlink( FIND_FIRST_INFO *info, const FILE_BOTH_DIR_INFORMATION *file_info )
119 {
120 UNICODE_STRING str;
121 ANSI_STRING unix_name;
122 struct stat st, parent_st;
123 BOOL ret = TRUE;
124 DWORD len;
125
126 str.MaximumLength = info->path.Length + sizeof(WCHAR) + file_info->FileNameLength;
127 if (!(str.Buffer = HeapAlloc( GetProcessHeap(), 0, str.MaximumLength ))) return TRUE;
128 memcpy( str.Buffer, info->path.Buffer, info->path.Length );
129 len = info->path.Length / sizeof(WCHAR);
130 if (!len || str.Buffer[len-1] != '\\') str.Buffer[len++] = '\\';
131 memcpy( str.Buffer + len, file_info->FileName, file_info->FileNameLength );
132 str.Length = len * sizeof(WCHAR) + file_info->FileNameLength;
133
134 unix_name.Buffer = NULL;
135 if (!wine_nt_to_unix_file_name( &str, &unix_name, OPEN_EXISTING, FALSE ) &&
136 !stat( unix_name.Buffer, &st ))
137 {
138 char *p = unix_name.Buffer + unix_name.Length - 1;
139
140 /* skip trailing slashes */
141 while (p > unix_name.Buffer && *p == '/') p--;
142
143 while (ret && p > unix_name.Buffer)
144 {
145 while (p > unix_name.Buffer && *p != '/') p--;
146 while (p > unix_name.Buffer && *p == '/') p--;
147 p[1] = 0;
148 if (!stat( unix_name.Buffer, &parent_st ) &&
149 parent_st.st_dev == st.st_dev &&
150 parent_st.st_ino == st.st_ino)
151 {
152 WARN( "suppressing dir symlink %s pointing to parent %s\n",
153 debugstr_wn( str.Buffer, str.Length/sizeof(WCHAR) ),
154 debugstr_a( unix_name.Buffer ));
155 ret = FALSE;
156 }
157 }
158 }
159 RtlFreeAnsiString( &unix_name );
160 RtlFreeUnicodeString( &str );
161 return ret;
162 }
163
164
165 /***********************************************************************
166 * FILE_SetDosError
167 *
168 * Set the DOS error code from errno.
169 */
170 void FILE_SetDosError(void)
171 {
172 int save_errno = errno; /* errno gets overwritten by printf */
173
174 TRACE("errno = %d %s\n", errno, strerror(errno));
175 switch (save_errno)
176 {
177 case EAGAIN:
178 SetLastError( ERROR_SHARING_VIOLATION );
179 break;
180 case EBADF:
181 SetLastError( ERROR_INVALID_HANDLE );
182 break;
183 case ENOSPC:
184 SetLastError( ERROR_HANDLE_DISK_FULL );
185 break;
186 case EACCES:
187 case EPERM:
188 case EROFS:
189 SetLastError( ERROR_ACCESS_DENIED );
190 break;
191 case EBUSY:
192 SetLastError( ERROR_LOCK_VIOLATION );
193 break;
194 case ENOENT:
195 SetLastError( ERROR_FILE_NOT_FOUND );
196 break;
197 case EISDIR:
198 SetLastError( ERROR_CANNOT_MAKE );
199 break;
200 case ENFILE:
201 case EMFILE:
202 SetLastError( ERROR_TOO_MANY_OPEN_FILES );
203 break;
204 case EEXIST:
205 SetLastError( ERROR_FILE_EXISTS );
206 break;
207 case EINVAL:
208 case ESPIPE:
209 SetLastError( ERROR_SEEK );
210 break;
211 case ENOTEMPTY:
212 SetLastError( ERROR_DIR_NOT_EMPTY );
213 break;
214 case ENOEXEC:
215 SetLastError( ERROR_BAD_FORMAT );
216 break;
217 case ENOTDIR:
218 SetLastError( ERROR_PATH_NOT_FOUND );
219 break;
220 case EXDEV:
221 SetLastError( ERROR_NOT_SAME_DEVICE );
222 break;
223 default:
224 WARN("unknown file error: %s\n", strerror(save_errno) );
225 SetLastError( ERROR_GEN_FAILURE );
226 break;
227 }
228 errno = save_errno;
229 }
230
231
232 /***********************************************************************
233 * FILE_name_AtoW
234 *
235 * Convert a file name to Unicode, taking into account the OEM/Ansi API mode.
236 *
237 * If alloc is FALSE uses the TEB static buffer, so it can only be used when
238 * there is no possibility for the function to do that twice, taking into
239 * account any called function.
240 */
241 WCHAR *FILE_name_AtoW( LPCSTR name, BOOL alloc )
242 {
243 ANSI_STRING str;
244 UNICODE_STRING strW, *pstrW;
245 NTSTATUS status;
246
247 RtlInitAnsiString( &str, name );
248 pstrW = alloc ? &strW : &NtCurrentTeb()->StaticUnicodeString;
249 if (oem_file_apis)
250 status = RtlOemStringToUnicodeString( pstrW, &str, alloc );
251 else
252 status = RtlAnsiStringToUnicodeString( pstrW, &str, alloc );
253 if (status == STATUS_SUCCESS) return pstrW->Buffer;
254
255 if (status == STATUS_BUFFER_OVERFLOW)
256 SetLastError( ERROR_FILENAME_EXCED_RANGE );
257 else
258 SetLastError( RtlNtStatusToDosError(status) );
259 return NULL;
260 }
261
262
263 /***********************************************************************
264 * FILE_name_WtoA
265 *
266 * Convert a file name back to OEM/Ansi. Returns number of bytes copied.
267 */
268 DWORD FILE_name_WtoA( LPCWSTR src, INT srclen, LPSTR dest, INT destlen )
269 {
270 DWORD ret;
271
272 if (srclen < 0) srclen = strlenW( src ) + 1;
273 if (oem_file_apis)
274 RtlUnicodeToOemN( dest, destlen, &ret, src, srclen * sizeof(WCHAR) );
275 else
276 RtlUnicodeToMultiByteN( dest, destlen, &ret, src, srclen * sizeof(WCHAR) );
277 return ret;
278 }
279
280
281 /**************************************************************************
282 * SetFileApisToOEM (KERNEL32.@)
283 */
284 VOID WINAPI SetFileApisToOEM(void)
285 {
286 oem_file_apis = TRUE;
287 }
288
289
290 /**************************************************************************
291 * SetFileApisToANSI (KERNEL32.@)
292 */
293 VOID WINAPI SetFileApisToANSI(void)
294 {
295 oem_file_apis = FALSE;
296 }
297
298
299 /******************************************************************************
300 * AreFileApisANSI (KERNEL32.@)
301 *
302 * Determines if file functions are using ANSI
303 *
304 * RETURNS
305 * TRUE: Set of file functions is using ANSI code page
306 * FALSE: Set of file functions is using OEM code page
307 */
308 BOOL WINAPI AreFileApisANSI(void)
309 {
310 return !oem_file_apis;
311 }
312
313
314 /**************************************************************************
315 * Operations on file handles *
316 **************************************************************************/
317
318 /***********************************************************************
319 * FILE_InitProcessDosHandles
320 *
321 * Allocates the default DOS handles for a process. Called either by
322 * Win32HandleToDosFileHandle below or by the DOSVM stuff.
323 */
324 static void FILE_InitProcessDosHandles( void )
325 {
326 static BOOL init_done /* = FALSE */;
327 HANDLE cp = GetCurrentProcess();
328
329 if (init_done) return;
330 init_done = TRUE;
331 DuplicateHandle(cp, GetStdHandle(STD_INPUT_HANDLE), cp, &dos_handles[0],
332 0, TRUE, DUPLICATE_SAME_ACCESS);
333 DuplicateHandle(cp, GetStdHandle(STD_OUTPUT_HANDLE), cp, &dos_handles[1],
334 0, TRUE, DUPLICATE_SAME_ACCESS);
335 DuplicateHandle(cp, GetStdHandle(STD_ERROR_HANDLE), cp, &dos_handles[2],
336 0, TRUE, DUPLICATE_SAME_ACCESS);
337 DuplicateHandle(cp, GetStdHandle(STD_ERROR_HANDLE), cp, &dos_handles[3],
338 0, TRUE, DUPLICATE_SAME_ACCESS);
339 DuplicateHandle(cp, GetStdHandle(STD_ERROR_HANDLE), cp, &dos_handles[4],
340 0, TRUE, DUPLICATE_SAME_ACCESS);
341 }
342
343
344 /******************************************************************
345 * FILE_ReadWriteApc (internal)
346 */
347 static void WINAPI FILE_ReadWriteApc(void* apc_user, PIO_STATUS_BLOCK io_status, ULONG reserved)
348 {
349 LPOVERLAPPED_COMPLETION_ROUTINE cr = (LPOVERLAPPED_COMPLETION_ROUTINE)apc_user;
350
351 cr(RtlNtStatusToDosError(io_status->u.Status), io_status->Information, (LPOVERLAPPED)io_status);
352 }
353
354
355 /***********************************************************************
356 * ReadFileEx (KERNEL32.@)
357 */
358 BOOL WINAPI ReadFileEx(HANDLE hFile, LPVOID buffer, DWORD bytesToRead,
359 LPOVERLAPPED overlapped,
360 LPOVERLAPPED_COMPLETION_ROUTINE lpCompletionRoutine)
361 {
362 LARGE_INTEGER offset;
363 NTSTATUS status;
364 PIO_STATUS_BLOCK io_status;
365
366 TRACE("(hFile=%p, buffer=%p, bytes=%u, ovl=%p, ovl_fn=%p)\n", hFile, buffer, bytesToRead, overlapped, lpCompletionRoutine);
367
368 if (!overlapped)
369 {
370 SetLastError(ERROR_INVALID_PARAMETER);
371 return FALSE;
372 }
373
374 offset.u.LowPart = overlapped->u.s.Offset;
375 offset.u.HighPart = overlapped->u.s.OffsetHigh;
376 io_status = (PIO_STATUS_BLOCK)overlapped;
377 io_status->u.Status = STATUS_PENDING;
378 io_status->Information = 0;
379
380 status = NtReadFile(hFile, NULL, FILE_ReadWriteApc, lpCompletionRoutine,
381 io_status, buffer, bytesToRead, &offset, NULL);
382
383 if (status)
384 {
385 SetLastError( RtlNtStatusToDosError(status) );
386 return FALSE;
387 }
388 return TRUE;
389 }
390
391
392 /***********************************************************************
393 * ReadFileScatter (KERNEL32.@)
394 */
395 BOOL WINAPI ReadFileScatter( HANDLE file, FILE_SEGMENT_ELEMENT *segments, DWORD count,
396 LPDWORD reserved, LPOVERLAPPED overlapped )
397 {
398 PIO_STATUS_BLOCK io_status;
399 LARGE_INTEGER offset;
400 NTSTATUS status;
401
402 TRACE( "(%p %p %u %p)\n", file, segments, count, overlapped );
403
404 offset.u.LowPart = overlapped->u.s.Offset;
405 offset.u.HighPart = overlapped->u.s.OffsetHigh;
406 io_status = (PIO_STATUS_BLOCK)overlapped;
407 io_status->u.Status = STATUS_PENDING;
408 io_status->Information = 0;
409
410 status = NtReadFileScatter( file, NULL, NULL, NULL, io_status, segments, count, &offset, NULL );
411 if (status) SetLastError( RtlNtStatusToDosError(status) );
412 return !status;
413 }
414
415
416 /***********************************************************************
417 * ReadFile (KERNEL32.@)
418 */
419 BOOL WINAPI ReadFile( HANDLE hFile, LPVOID buffer, DWORD bytesToRead,
420 LPDWORD bytesRead, LPOVERLAPPED overlapped )
421 {
422 LARGE_INTEGER offset;
423 PLARGE_INTEGER poffset = NULL;
424 IO_STATUS_BLOCK iosb;
425 PIO_STATUS_BLOCK io_status = &iosb;
426 HANDLE hEvent = 0;
427 NTSTATUS status;
428 LPVOID cvalue = NULL;
429
430 TRACE("%p %p %d %p %p\n", hFile, buffer, bytesToRead,
431 bytesRead, overlapped );
432
433 if (bytesRead) *bytesRead = 0; /* Do this before anything else */
434 if (!bytesToRead) return TRUE;
435
436 if (is_console_handle(hFile))
437 return ReadConsoleA(hFile, buffer, bytesToRead, bytesRead, NULL);
438
439 if (overlapped != NULL)
440 {
441 offset.u.LowPart = overlapped->u.s.Offset;
442 offset.u.HighPart = overlapped->u.s.OffsetHigh;
443 poffset = &offset;
444 hEvent = overlapped->hEvent;
445 io_status = (PIO_STATUS_BLOCK)overlapped;
446 if (((ULONG_PTR)hEvent & 1) == 0) cvalue = overlapped;
447 }
448 io_status->u.Status = STATUS_PENDING;
449 io_status->Information = 0;
450
451 status = NtReadFile(hFile, hEvent, NULL, cvalue, io_status, buffer, bytesToRead, poffset, NULL);
452
453 if (status == STATUS_PENDING && !overlapped)
454 {
455 WaitForSingleObject( hFile, INFINITE );
456 status = io_status->u.Status;
457 }
458
459 if (status != STATUS_PENDING && bytesRead)
460 *bytesRead = io_status->Information;
461
462 if (status && status != STATUS_END_OF_FILE && status != STATUS_TIMEOUT)
463 {
464 SetLastError( RtlNtStatusToDosError(status) );
465 return FALSE;
466 }
467 return TRUE;
468 }
469
470
471 /***********************************************************************
472 * WriteFileEx (KERNEL32.@)
473 */
474 BOOL WINAPI WriteFileEx(HANDLE hFile, LPCVOID buffer, DWORD bytesToWrite,
475 LPOVERLAPPED overlapped,
476 LPOVERLAPPED_COMPLETION_ROUTINE lpCompletionRoutine)
477 {
478 LARGE_INTEGER offset;
479 NTSTATUS status;
480 PIO_STATUS_BLOCK io_status;
481
482 TRACE("%p %p %d %p %p\n", hFile, buffer, bytesToWrite, overlapped, lpCompletionRoutine);
483
484 if (overlapped == NULL)
485 {
486 SetLastError(ERROR_INVALID_PARAMETER);
487 return FALSE;
488 }
489 offset.u.LowPart = overlapped->u.s.Offset;
490 offset.u.HighPart = overlapped->u.s.OffsetHigh;
491
492 io_status = (PIO_STATUS_BLOCK)overlapped;
493 io_status->u.Status = STATUS_PENDING;
494 io_status->Information = 0;
495
496 status = NtWriteFile(hFile, NULL, FILE_ReadWriteApc, lpCompletionRoutine,
497 io_status, buffer, bytesToWrite, &offset, NULL);
498
499 if (status) SetLastError( RtlNtStatusToDosError(status) );
500 return !status;
501 }
502
503
504 /***********************************************************************
505 * WriteFileGather (KERNEL32.@)
506 */
507 BOOL WINAPI WriteFileGather( HANDLE file, FILE_SEGMENT_ELEMENT *segments, DWORD count,
508 LPDWORD reserved, LPOVERLAPPED overlapped )
509 {
510 PIO_STATUS_BLOCK io_status;
511 LARGE_INTEGER offset;
512 NTSTATUS status;
513
514 TRACE( "%p %p %u %p\n", file, segments, count, overlapped );
515
516 offset.u.LowPart = overlapped->u.s.Offset;
517 offset.u.HighPart = overlapped->u.s.OffsetHigh;
518 io_status = (PIO_STATUS_BLOCK)overlapped;
519 io_status->u.Status = STATUS_PENDING;
520 io_status->Information = 0;
521
522 status = NtWriteFileGather( file, NULL, NULL, NULL, io_status, segments, count, &offset, NULL );
523 if (status) SetLastError( RtlNtStatusToDosError(status) );
524 return !status;
525 }
526
527
528 /***********************************************************************
529 * WriteFile (KERNEL32.@)
530 */
531 BOOL WINAPI WriteFile( HANDLE hFile, LPCVOID buffer, DWORD bytesToWrite,
532 LPDWORD bytesWritten, LPOVERLAPPED overlapped )
533 {
534 HANDLE hEvent = NULL;
535 LARGE_INTEGER offset;
536 PLARGE_INTEGER poffset = NULL;
537 NTSTATUS status;
538 IO_STATUS_BLOCK iosb;
539 PIO_STATUS_BLOCK piosb = &iosb;
540 LPVOID cvalue = NULL;
541
542 TRACE("%p %p %d %p %p\n", hFile, buffer, bytesToWrite, bytesWritten, overlapped );
543
544 if (is_console_handle(hFile))
545 return WriteConsoleA(hFile, buffer, bytesToWrite, bytesWritten, NULL);
546
547 if (overlapped)
548 {
549 offset.u.LowPart = overlapped->u.s.Offset;
550 offset.u.HighPart = overlapped->u.s.OffsetHigh;
551 poffset = &offset;
552 hEvent = overlapped->hEvent;
553 piosb = (PIO_STATUS_BLOCK)overlapped;
554 if (((ULONG_PTR)hEvent & 1) == 0) cvalue = overlapped;
555 }
556 piosb->u.Status = STATUS_PENDING;
557 piosb->Information = 0;
558
559 status = NtWriteFile(hFile, hEvent, NULL, cvalue, piosb,
560 buffer, bytesToWrite, poffset, NULL);
561
562 /* FIXME: NtWriteFile does not always cause page faults, generate them now */
563 if (status == STATUS_INVALID_USER_BUFFER && !IsBadReadPtr( buffer, bytesToWrite ))
564 {
565 status = NtWriteFile(hFile, hEvent, NULL, cvalue, piosb,
566 buffer, bytesToWrite, poffset, NULL);
567 if (status != STATUS_INVALID_USER_BUFFER)
568 FIXME("Could not access memory (%p,%d) at first, now OK. Protected by DIBSection code?\n",
569 buffer, bytesToWrite);
570 }
571
572 if (status == STATUS_PENDING && !overlapped)
573 {
574 WaitForSingleObject( hFile, INFINITE );
575 status = piosb->u.Status;
576 }
577
578 if (status != STATUS_PENDING && bytesWritten)
579 *bytesWritten = piosb->Information;
580
581 if (status && status != STATUS_TIMEOUT)
582 {
583 SetLastError( RtlNtStatusToDosError(status) );
584 return FALSE;
585 }
586 return TRUE;
587 }
588
589
590 /***********************************************************************
591 * GetOverlappedResult (KERNEL32.@)
592 *
593 * Check the result of an Asynchronous data transfer from a file.
594 *
595 * Parameters
596 * HANDLE hFile [in] handle of file to check on
597 * LPOVERLAPPED lpOverlapped [in/out] pointer to overlapped
598 * LPDWORD lpTransferred [in/out] number of bytes transferred
599 * BOOL bWait [in] wait for the transfer to complete ?
600 *
601 * RETURNS
602 * TRUE on success
603 * FALSE on failure
604 *
605 * If successful (and relevant) lpTransferred will hold the number of
606 * bytes transferred during the async operation.
607 */
608 BOOL WINAPI GetOverlappedResult(HANDLE hFile, LPOVERLAPPED lpOverlapped,
609 LPDWORD lpTransferred, BOOL bWait)
610 {
611 NTSTATUS status;
612
613 TRACE( "(%p %p %p %x)\n", hFile, lpOverlapped, lpTransferred, bWait );
614
615 if ( lpOverlapped == NULL )
616 {
617 ERR("lpOverlapped was null\n");
618 return FALSE;
619 }
620
621 status = lpOverlapped->Internal;
622 if (status == STATUS_PENDING)
623 {
624 if (!bWait)
625 {
626 SetLastError( ERROR_IO_INCOMPLETE );
627 return FALSE;
628 }
629
630 if (WaitForSingleObject( lpOverlapped->hEvent ? lpOverlapped->hEvent : hFile,
631 INFINITE ) == WAIT_FAILED)
632 return FALSE;
633 status = lpOverlapped->Internal;
634 }
635
636 if (lpTransferred) *lpTransferred = lpOverlapped->InternalHigh;
637
638 if (status) SetLastError( RtlNtStatusToDosError(status) );
639 return !status;
640 }
641
642 /***********************************************************************
643 * CancelIo (KERNEL32.@)
644 *
645 * Cancels pending I/O operations initiated by the current thread on a file.
646 *
647 * PARAMS
648 * handle [I] File handle.
649 *
650 * RETURNS
651 * Success: TRUE.
652 * Failure: FALSE, check GetLastError().
653 */
654 BOOL WINAPI CancelIo(HANDLE handle)
655 {
656 IO_STATUS_BLOCK io_status;
657
658 NtCancelIoFile(handle, &io_status);
659 if (io_status.u.Status)
660 {
661 SetLastError( RtlNtStatusToDosError( io_status.u.Status ) );
662 return FALSE;
663 }
664 return TRUE;
665 }
666
667 /***********************************************************************
668 * _hread (KERNEL32.@)
669 */
670 LONG WINAPI _hread( HFILE hFile, LPVOID buffer, LONG count)
671 {
672 return _lread( hFile, buffer, count );
673 }
674
675
676 /***********************************************************************
677 * _hwrite (KERNEL32.@)
678 *
679 * experimentation yields that _lwrite:
680 * o truncates the file at the current position with
681 * a 0 len write
682 * o returns 0 on a 0 length write
683 * o works with console handles
684 *
685 */
686 LONG WINAPI _hwrite( HFILE handle, LPCSTR buffer, LONG count )
687 {
688 DWORD result;
689
690 TRACE("%d %p %d\n", handle, buffer, count );
691
692 if (!count)
693 {
694 /* Expand or truncate at current position */
695 if (!SetEndOfFile( LongToHandle(handle) )) return HFILE_ERROR;
696 return 0;
697 }
698 if (!WriteFile( LongToHandle(handle), buffer, count, &result, NULL ))
699 return HFILE_ERROR;
700 return result;
701 }
702
703
704 /***********************************************************************
705 * _lclose (KERNEL32.@)
706 */
707 HFILE WINAPI _lclose( HFILE hFile )
708 {
709 TRACE("handle %d\n", hFile );
710 return CloseHandle( LongToHandle(hFile) ) ? 0 : HFILE_ERROR;
711 }
712
713
714 /***********************************************************************
715 * _lcreat (KERNEL32.@)
716 */
717 HFILE WINAPI _lcreat( LPCSTR path, INT attr )
718 {
719 HANDLE hfile;
720
721 /* Mask off all flags not explicitly allowed by the doc */
722 attr &= FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM;
723 TRACE("%s %02x\n", path, attr );
724 hfile = CreateFileA( path, GENERIC_READ | GENERIC_WRITE,
725 FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
726 CREATE_ALWAYS, attr, 0 );
727 return HandleToLong(hfile);
728 }
729
730
731 /***********************************************************************
732 * _lopen (KERNEL32.@)
733 */
734 HFILE WINAPI _lopen( LPCSTR path, INT mode )
735 {
736 HANDLE hfile;
737
738 TRACE("(%s,%04x)\n", debugstr_a(path), mode );
739 hfile = create_file_OF( path, mode & ~OF_CREATE );
740 return HandleToLong(hfile);
741 }
742
743 /***********************************************************************
744 * _lread (KERNEL32.@)
745 */
746 UINT WINAPI _lread( HFILE handle, LPVOID buffer, UINT count )
747 {
748 DWORD result;
749 if (!ReadFile( LongToHandle(handle), buffer, count, &result, NULL ))
750 return HFILE_ERROR;
751 return result;
752 }
753
754
755 /***********************************************************************
756 * _llseek (KERNEL32.@)
757 */
758 LONG WINAPI _llseek( HFILE hFile, LONG lOffset, INT nOrigin )
759 {
760 return SetFilePointer( LongToHandle(hFile), lOffset, NULL, nOrigin );
761 }
762
763
764 /***********************************************************************
765 * _lwrite (KERNEL32.@)
766 */
767 UINT WINAPI _lwrite( HFILE hFile, LPCSTR buffer, UINT count )
768 {
769 return (UINT)_hwrite( hFile, buffer, (LONG)count );
770 }
771
772
773 /***********************************************************************
774 * FlushFileBuffers (KERNEL32.@)
775 */
776 BOOL WINAPI FlushFileBuffers( HANDLE hFile )
777 {
778 NTSTATUS nts;
779 IO_STATUS_BLOCK ioblk;
780
781 if (is_console_handle( hFile ))
782 {
783 /* this will fail (as expected) for an output handle */
784 return FlushConsoleInputBuffer( hFile );
785 }
786 nts = NtFlushBuffersFile( hFile, &ioblk );
787 if (nts != STATUS_SUCCESS)
788 {
789 SetLastError( RtlNtStatusToDosError( nts ) );
790 return FALSE;
791 }
792
793 return TRUE;
794 }
795
796
797 /***********************************************************************
798 * GetFileType (KERNEL32.@)
799 */
800 DWORD WINAPI GetFileType( HANDLE hFile )
801 {
802 FILE_FS_DEVICE_INFORMATION info;
803 IO_STATUS_BLOCK io;
804 NTSTATUS status;
805
806 if (is_console_handle( hFile )) return FILE_TYPE_CHAR;
807
808 status = NtQueryVolumeInformationFile( hFile, &io, &info, sizeof(info), FileFsDeviceInformation );
809 if (status != STATUS_SUCCESS)
810 {
811 SetLastError( RtlNtStatusToDosError(status) );
812 return FILE_TYPE_UNKNOWN;
813 }
814
815 switch(info.DeviceType)
816 {
817 case FILE_DEVICE_NULL:
818 case FILE_DEVICE_SERIAL_PORT:
819 case FILE_DEVICE_PARALLEL_PORT:
820 case FILE_DEVICE_TAPE:
821 case FILE_DEVICE_UNKNOWN:
822 return FILE_TYPE_CHAR;
823 case FILE_DEVICE_NAMED_PIPE:
824 return FILE_TYPE_PIPE;
825 default:
826 return FILE_TYPE_DISK;
827 }
828 }
829
830
831 /***********************************************************************
832 * GetFileInformationByHandle (KERNEL32.@)
833 */
834 BOOL WINAPI GetFileInformationByHandle( HANDLE hFile, BY_HANDLE_FILE_INFORMATION *info )
835 {
836 FILE_ALL_INFORMATION all_info;
837 IO_STATUS_BLOCK io;
838 NTSTATUS status;
839
840 status = NtQueryInformationFile( hFile, &io, &all_info, sizeof(all_info), FileAllInformation );
841 if (status == STATUS_SUCCESS)
842 {
843 info->dwFileAttributes = all_info.BasicInformation.FileAttributes;
844 info->ftCreationTime.dwHighDateTime = all_info.BasicInformation.CreationTime.u.HighPart;
845 info->ftCreationTime.dwLowDateTime = all_info.BasicInformation.CreationTime.u.LowPart;
846 info->ftLastAccessTime.dwHighDateTime = all_info.BasicInformation.LastAccessTime.u.HighPart;
847 info->ftLastAccessTime.dwLowDateTime = all_info.BasicInformation.LastAccessTime.u.LowPart;
848 info->ftLastWriteTime.dwHighDateTime = all_info.BasicInformation.LastWriteTime.u.HighPart;
849 info->ftLastWriteTime.dwLowDateTime = all_info.BasicInformation.LastWriteTime.u.LowPart;
850 info->dwVolumeSerialNumber = 0; /* FIXME */
851 info->nFileSizeHigh = all_info.StandardInformation.EndOfFile.u.HighPart;
852 info->nFileSizeLow = all_info.StandardInformation.EndOfFile.u.LowPart;
853 info->nNumberOfLinks = all_info.StandardInformation.NumberOfLinks;
854 info->nFileIndexHigh = all_info.InternalInformation.IndexNumber.u.HighPart;
855 info->nFileIndexLow = all_info.InternalInformation.IndexNumber.u.LowPart;
856 return TRUE;
857 }
858 SetLastError( RtlNtStatusToDosError(status) );
859 return FALSE;
860 }
861
862
863 /***********************************************************************
864 * GetFileSize (KERNEL32.@)
865 *
866 * Retrieve the size of a file.
867 *
868 * PARAMS
869 * hFile [I] File to retrieve size of.
870 * filesizehigh [O] On return, the high bits of the file size.
871 *
872 * RETURNS
873 * Success: The low bits of the file size.
874 * Failure: INVALID_FILE_SIZE. As this is could also be a success value,
875 * check GetLastError() for values other than ERROR_SUCCESS.
876 */
877 DWORD WINAPI GetFileSize( HANDLE hFile, LPDWORD filesizehigh )
878 {
879 LARGE_INTEGER size;
880 if (!GetFileSizeEx( hFile, &size )) return INVALID_FILE_SIZE;
881 if (filesizehigh) *filesizehigh = size.u.HighPart;
882 if (size.u.LowPart == INVALID_FILE_SIZE) SetLastError(0);
883 return size.u.LowPart;
884 }
885
886
887 /***********************************************************************
888 * GetFileSizeEx (KERNEL32.@)
889 *
890 * Retrieve the size of a file.
891 *
892 * PARAMS
893 * hFile [I] File to retrieve size of.
894 * lpFileSIze [O] On return, the size of the file.
895 *
896 * RETURNS
897 * Success: TRUE.
898 * Failure: FALSE, check GetLastError().
899 */
900 BOOL WINAPI GetFileSizeEx( HANDLE hFile, PLARGE_INTEGER lpFileSize )
901 {
902 FILE_END_OF_FILE_INFORMATION info;
903 IO_STATUS_BLOCK io;
904 NTSTATUS status;
905
906 status = NtQueryInformationFile( hFile, &io, &info, sizeof(info), FileEndOfFileInformation );
907 if (status == STATUS_SUCCESS)
908 {
909 *lpFileSize = info.EndOfFile;
910 return TRUE;
911 }
912 SetLastError( RtlNtStatusToDosError(status) );
913 return FALSE;
914 }
915
916
917 /**************************************************************************
918 * SetEndOfFile (KERNEL32.@)
919 *
920 * Sets the current position as the end of the file.
921 *
922 * PARAMS
923 * hFile [I] File handle.
924 *
925 * RETURNS
926 * Success: TRUE.
927 * Failure: FALSE, check GetLastError().
928 */
929 BOOL WINAPI SetEndOfFile( HANDLE hFile )
930 {
931 FILE_POSITION_INFORMATION pos;
932 FILE_END_OF_FILE_INFORMATION eof;
933 IO_STATUS_BLOCK io;
934 NTSTATUS status;
935
936 status = NtQueryInformationFile( hFile, &io, &pos, sizeof(pos), FilePositionInformation );
937 if (status == STATUS_SUCCESS)
938 {
939 eof.EndOfFile = pos.CurrentByteOffset;
940 status = NtSetInformationFile( hFile, &io, &eof, sizeof(eof), FileEndOfFileInformation );