fileio-win.cpp@ 76902

Last change on this file since 76902 was 76902, checked in by vboxsync, 6 years ago
IPRT/RTFileRead: Set pcbRead when returning immediately on a zero byte read. bugref:9172
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File size: 38.2 KB

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1	/* $Id: fileio-win.cpp 76902 2019-01-19 14:25:38Z vboxsync $ */
2	/** @file
3	* IPRT - File I/O, native implementation for the Windows host platform.
4	*/
5
6	/*
7	* Copyright (C) 2006-2019 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.215389.xyz. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* The contents of this file may alternatively be used under the terms
18	* of the Common Development and Distribution License Version 1.0
19	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20	* VirtualBox OSE distribution, in which case the provisions of the
21	* CDDL are applicable instead of those of the GPL.
22	*
23	* You may elect to license modified versions of this file under the
24	* terms and conditions of either the GPL or the CDDL or both.
25	*/
26
27
28	/*********************************************************************************************************************************
29	* Header Files *
30	*********************************************************************************************************************************/
31	#define LOG_GROUP RTLOGGROUP_DIR
32	#ifndef _WIN32_WINNT
33	# define _WIN32_WINNT 0x0500
34	#endif
35	#include <iprt/nt/nt-and-windows.h>
36
37	#include <iprt/file.h>
38
39	#include <iprt/asm.h>
40	#include <iprt/assert.h>
41	#include <iprt/path.h>
42	#include <iprt/string.h>
43	#include <iprt/err.h>
44	#include <iprt/ldr.h>
45	#include <iprt/log.h>
46	#include "internal/file.h"
47	#include "internal/fs.h"
48	#include "internal/path.h"
49	#include "internal-r3-win.h" /* For g_enmWinVer + kRTWinOSType_XXX */
50
51
52	/*********************************************************************************************************************************
53	* Defined Constants And Macros *
54	*********************************************************************************************************************************/
55	typedef BOOL WINAPI FNVERIFYCONSOLEIOHANDLE(HANDLE);
56	typedef FNVERIFYCONSOLEIOHANDLE PFNVERIFYCONSOLEIOHANDLE; / No, nobody fell on the keyboard, really! */
57
58	/**
59	* This is wrapper around the ugly SetFilePointer api.
60	*
61	* It's equivalent to SetFilePointerEx which we so unfortunately cannot use because of
62	* it not being present in NT4 GA.
63	*
64	* @returns Success indicator. Extended error information obtainable using GetLastError().
65	* @param hFile Filehandle.
66	* @param offSeek Offset to seek.
67	* @param poffNew Where to store the new file offset. NULL allowed.
68	* @param uMethod Seek method. (The windows one!)
69	*/
70	DECLINLINE(bool) MySetFilePointer(RTFILE hFile, uint64_t offSeek, uint64_t *poffNew, unsigned uMethod)
71	{
72	bool fRc;
73	LARGE_INTEGER off;
74
75	off.QuadPart = offSeek;
76	#if 1
77	if (off.LowPart != INVALID_SET_FILE_POINTER)
78	{
79	off.LowPart = SetFilePointer((HANDLE)RTFileToNative(hFile), off.LowPart, &off.HighPart, uMethod);
80	fRc = off.LowPart != INVALID_SET_FILE_POINTER;
81	}
82	else
83	{
84	SetLastError(NO_ERROR);
85	off.LowPart = SetFilePointer((HANDLE)RTFileToNative(hFile), off.LowPart, &off.HighPart, uMethod);
86	fRc = GetLastError() == NO_ERROR;
87	}
88	#else
89	fRc = SetFilePointerEx((HANDLE)RTFileToNative(hFile), off, &off, uMethod);
90	#endif
91	if (fRc && poffNew)
92	*poffNew = off.QuadPart;
93	return fRc;
94	}
95
96
97	/**
98	* This is a helper to check if an attempt was made to grow a file beyond the
99	* limit of the filesystem.
100	*
101	* @returns true for file size limit exceeded.
102	* @param hFile Filehandle.
103	* @param offSeek Offset to seek.
104	* @param uMethod The seek method.
105	*/
106	DECLINLINE(bool) IsBeyondLimit(RTFILE hFile, uint64_t offSeek, unsigned uMethod)
107	{
108	bool fIsBeyondLimit = false;
109
110	/*
111	* Get the current file position and try set the new one.
112	* If it fails with a seek error it's because we hit the file system limit.
113	*/
114	/** @todo r=bird: I'd be very interested to know on which versions of windows and on which file systems
115	* this supposedly works. The fastfat sources in the latest WDK makes no limit checks during
116	* file seeking, only at the time of writing (and some other odd ones we cannot make use of). */
117	uint64_t offCurrent;
118	if (MySetFilePointer(hFile, 0, &offCurrent, FILE_CURRENT))
119	{
120	if (!MySetFilePointer(hFile, offSeek, NULL, uMethod))
121	fIsBeyondLimit = GetLastError() == ERROR_SEEK;
122	else /* Restore file pointer on success. */
123	MySetFilePointer(hFile, offCurrent, NULL, FILE_BEGIN);
124	}
125
126	return fIsBeyondLimit;
127	}
128
129
130	RTR3DECL(int) RTFileFromNative(PRTFILE pFile, RTHCINTPTR uNative)
131	{
132	HANDLE h = (HANDLE)uNative;
133	AssertCompile(sizeof(h) == sizeof(uNative));
134	if (h == INVALID_HANDLE_VALUE)
135	{
136	AssertMsgFailed(("%p\n", uNative));
137	*pFile = NIL_RTFILE;
138	return VERR_INVALID_HANDLE;
139	}
140	*pFile = (RTFILE)h;
141	return VINF_SUCCESS;
142	}
143
144
145	RTR3DECL(RTHCINTPTR) RTFileToNative(RTFILE hFile)
146	{
147	AssertReturn(hFile != NIL_RTFILE, (RTHCINTPTR)INVALID_HANDLE_VALUE);
148	return (RTHCINTPTR)hFile;
149	}
150
151
152	RTR3DECL(int) RTFileOpen(PRTFILE pFile, const char *pszFilename, uint64_t fOpen)
153	{
154	/*
155	* Validate input.
156	*/
157	if (!pFile)
158	{
159	AssertMsgFailed(("Invalid pFile\n"));
160	return VERR_INVALID_PARAMETER;
161	}
162	*pFile = NIL_RTFILE;
163	if (!pszFilename)
164	{
165	AssertMsgFailed(("Invalid pszFilename\n"));
166	return VERR_INVALID_PARAMETER;
167	}
168
169	/*
170	* Merge forced open flags and validate them.
171	*/
172	int rc = rtFileRecalcAndValidateFlags(&fOpen);
173	if (RT_FAILURE(rc))
174	return rc;
175
176	/*
177	* Determine disposition, access, share mode, creation flags, and security attributes
178	* for the CreateFile API call.
179	*/
180	DWORD dwCreationDisposition;
181	switch (fOpen & RTFILE_O_ACTION_MASK)
182	{
183	case RTFILE_O_OPEN:
184	dwCreationDisposition = fOpen & RTFILE_O_TRUNCATE ? TRUNCATE_EXISTING : OPEN_EXISTING;
185	break;
186	case RTFILE_O_OPEN_CREATE:
187	dwCreationDisposition = OPEN_ALWAYS;
188	break;
189	case RTFILE_O_CREATE:
190	dwCreationDisposition = CREATE_NEW;
191	break;
192	case RTFILE_O_CREATE_REPLACE:
193	dwCreationDisposition = CREATE_ALWAYS;
194	break;
195	default:
196	AssertMsgFailed(("Impossible fOpen=%#llx\n", fOpen));
197	return VERR_INVALID_PARAMETER;
198	}
199
200	DWORD dwDesiredAccess;
201	switch (fOpen & RTFILE_O_ACCESS_MASK)
202	{
203	case RTFILE_O_READ:
204	dwDesiredAccess = FILE_GENERIC_READ; /* RTFILE_O_APPEND is ignored. */
205	break;
206	case RTFILE_O_WRITE:
207	dwDesiredAccess = fOpen & RTFILE_O_APPEND
208	? FILE_GENERIC_WRITE & ~FILE_WRITE_DATA
209	: FILE_GENERIC_WRITE;
210	break;
211	case RTFILE_O_READWRITE:
212	dwDesiredAccess = fOpen & RTFILE_O_APPEND
213	? FILE_GENERIC_READ \| (FILE_GENERIC_WRITE & ~FILE_WRITE_DATA)
214	: FILE_GENERIC_READ \| FILE_GENERIC_WRITE;
215	break;
216	case RTFILE_O_ATTR_ONLY:
217	if (fOpen & RTFILE_O_ACCESS_ATTR_MASK)
218	{
219	dwDesiredAccess = 0;
220	break;
221	}
222	RT_FALL_THRU();
223	default:
224	AssertMsgFailed(("Impossible fOpen=%#llx\n", fOpen));
225	return VERR_INVALID_PARAMETER;
226	}
227	if (dwCreationDisposition == TRUNCATE_EXISTING)
228	/* Required for truncating the file (see MSDN), it is NOT part of FILE_GENERIC_WRITE. */
229	dwDesiredAccess \|= GENERIC_WRITE;
230
231	/* RTFileSetMode needs following rights as well. */
232	switch (fOpen & RTFILE_O_ACCESS_ATTR_MASK)
233	{
234	case RTFILE_O_ACCESS_ATTR_READ: dwDesiredAccess \|= FILE_READ_ATTRIBUTES \| SYNCHRONIZE; break;
235	case RTFILE_O_ACCESS_ATTR_WRITE: dwDesiredAccess \|= FILE_WRITE_ATTRIBUTES \| SYNCHRONIZE; break;
236	case RTFILE_O_ACCESS_ATTR_READWRITE: dwDesiredAccess \|= FILE_READ_ATTRIBUTES \| FILE_WRITE_ATTRIBUTES \| SYNCHRONIZE; break;
237	default:
238	/* Attributes access is the same as the file access. */
239	switch (fOpen & RTFILE_O_ACCESS_MASK)
240	{
241	case RTFILE_O_READ: dwDesiredAccess \|= FILE_READ_ATTRIBUTES \| SYNCHRONIZE; break;
242	case RTFILE_O_WRITE: dwDesiredAccess \|= FILE_WRITE_ATTRIBUTES \| SYNCHRONIZE; break;
243	case RTFILE_O_READWRITE: dwDesiredAccess \|= FILE_READ_ATTRIBUTES \| FILE_WRITE_ATTRIBUTES \| SYNCHRONIZE; break;
244	default:
245	AssertMsgFailed(("Impossible fOpen=%#llx\n", fOpen));
246	return VERR_INVALID_PARAMETER;
247	}
248	}
249
250	DWORD dwShareMode;
251	switch (fOpen & RTFILE_O_DENY_MASK)
252	{
253	case RTFILE_O_DENY_NONE: dwShareMode = FILE_SHARE_READ \| FILE_SHARE_WRITE; break;
254	case RTFILE_O_DENY_READ: dwShareMode = FILE_SHARE_WRITE; break;
255	case RTFILE_O_DENY_WRITE: dwShareMode = FILE_SHARE_READ; break;
256	case RTFILE_O_DENY_READWRITE: dwShareMode = 0; break;
257
258	case RTFILE_O_DENY_NOT_DELETE: dwShareMode = FILE_SHARE_DELETE \| FILE_SHARE_READ \| FILE_SHARE_WRITE; break;
259	case RTFILE_O_DENY_NOT_DELETE \| RTFILE_O_DENY_READ: dwShareMode = FILE_SHARE_DELETE \| FILE_SHARE_WRITE; break;
260	case RTFILE_O_DENY_NOT_DELETE \| RTFILE_O_DENY_WRITE: dwShareMode = FILE_SHARE_DELETE \| FILE_SHARE_READ; break;
261	case RTFILE_O_DENY_NOT_DELETE \| RTFILE_O_DENY_READWRITE:dwShareMode = FILE_SHARE_DELETE; break;
262	default:
263	AssertMsgFailed(("Impossible fOpen=%#llx\n", fOpen));
264	return VERR_INVALID_PARAMETER;
265	}
266
267	SECURITY_ATTRIBUTES SecurityAttributes;
268	PSECURITY_ATTRIBUTES pSecurityAttributes = NULL;
269	if (fOpen & RTFILE_O_INHERIT)
270	{
271	SecurityAttributes.nLength = sizeof(SecurityAttributes);
272	SecurityAttributes.lpSecurityDescriptor = NULL;
273	SecurityAttributes.bInheritHandle = TRUE;
274	pSecurityAttributes = &SecurityAttributes;
275	}
276
277	DWORD dwFlagsAndAttributes;
278	dwFlagsAndAttributes = FILE_ATTRIBUTE_NORMAL;
279	if (fOpen & RTFILE_O_WRITE_THROUGH)
280	dwFlagsAndAttributes \|= FILE_FLAG_WRITE_THROUGH;
281	if (fOpen & RTFILE_O_ASYNC_IO)
282	dwFlagsAndAttributes \|= FILE_FLAG_OVERLAPPED;
283	if (fOpen & RTFILE_O_NO_CACHE)
284	{
285	dwFlagsAndAttributes \|= FILE_FLAG_NO_BUFFERING;
286	dwDesiredAccess &= ~FILE_APPEND_DATA;
287	}
288
289	/*
290	* Open/Create the file.
291	*/
292	PRTUTF16 pwszFilename;
293	rc = RTPathWinFromUtf8(&pwszFilename, pszFilename, 0 /fFlags/);
294	if (RT_SUCCESS(rc))
295	{
296	HANDLE hFile = CreateFileW(pwszFilename,
297	dwDesiredAccess,
298	dwShareMode,
299	pSecurityAttributes,
300	dwCreationDisposition,
301	dwFlagsAndAttributes,
302	NULL);
303	if (hFile != INVALID_HANDLE_VALUE)
304	{
305	bool fCreated = dwCreationDisposition == CREATE_ALWAYS
306	\|\| dwCreationDisposition == CREATE_NEW
307	\|\| (dwCreationDisposition == OPEN_ALWAYS && GetLastError() == 0);
308
309	/*
310	* Turn off indexing of directory through Windows Indexing Service.
311	*/
312	if ( fCreated
313	&& (fOpen & RTFILE_O_NOT_CONTENT_INDEXED))
314	{
315	if (!SetFileAttributesW(pwszFilename, FILE_ATTRIBUTE_NOT_CONTENT_INDEXED))
316	rc = RTErrConvertFromWin32(GetLastError());
317	}
318	/*
319	* Do we need to truncate the file?
320	*/
321	else if ( !fCreated
322	&& (fOpen & (RTFILE_O_TRUNCATE \| RTFILE_O_ACTION_MASK))
323	== (RTFILE_O_TRUNCATE \| RTFILE_O_OPEN_CREATE))
324	{
325	if (!SetEndOfFile(hFile))
326	rc = RTErrConvertFromWin32(GetLastError());
327	}
328	if (RT_SUCCESS(rc))
329	{
330	*pFile = (RTFILE)hFile;
331	Assert((HANDLE)*pFile == hFile);
332	RTPathWinFree(pwszFilename);
333	return VINF_SUCCESS;
334	}
335
336	CloseHandle(hFile);
337	}
338	else
339	rc = RTErrConvertFromWin32(GetLastError());
340	RTPathWinFree(pwszFilename);
341	}
342	return rc;
343	}
344
345
346	RTR3DECL(int) RTFileOpenBitBucket(PRTFILE phFile, uint64_t fAccess)
347	{
348	AssertReturn( fAccess == RTFILE_O_READ
349	\|\| fAccess == RTFILE_O_WRITE
350	\|\| fAccess == RTFILE_O_READWRITE,
351	VERR_INVALID_PARAMETER);
352	return RTFileOpen(phFile, "NUL", fAccess \| RTFILE_O_DENY_NONE \| RTFILE_O_OPEN);
353	}
354
355
356	RTR3DECL(int) RTFileClose(RTFILE hFile)
357	{
358	if (hFile == NIL_RTFILE)
359	return VINF_SUCCESS;
360	if (CloseHandle((HANDLE)RTFileToNative(hFile)))
361	return VINF_SUCCESS;
362	return RTErrConvertFromWin32(GetLastError());
363	}
364
365
366	RTFILE rtFileGetStandard(RTHANDLESTD enmStdHandle)
367	{
368	DWORD dwStdHandle;
369	switch (enmStdHandle)
370	{
371	case RTHANDLESTD_INPUT: dwStdHandle = STD_INPUT_HANDLE; break;
372	case RTHANDLESTD_OUTPUT: dwStdHandle = STD_OUTPUT_HANDLE; break;
373	case RTHANDLESTD_ERROR: dwStdHandle = STD_ERROR_HANDLE; break;
374	default:
375	AssertFailedReturn(NIL_RTFILE);
376	}
377
378	HANDLE hNative = GetStdHandle(dwStdHandle);
379	if (hNative == INVALID_HANDLE_VALUE)
380	return NIL_RTFILE;
381
382	RTFILE hFile = (RTFILE)(uintptr_t)hNative;
383	AssertReturn((HANDLE)(uintptr_t)hFile == hNative, NIL_RTFILE);
384	return hFile;
385	}
386
387
388	RTR3DECL(int) RTFileSeek(RTFILE hFile, int64_t offSeek, unsigned uMethod, uint64_t *poffActual)
389	{
390	static ULONG aulSeekRecode[] =
391	{
392	FILE_BEGIN,
393	FILE_CURRENT,
394	FILE_END,
395	};
396
397	/*
398	* Validate input.
399	*/
400	if (uMethod > RTFILE_SEEK_END)
401	{
402	AssertMsgFailed(("Invalid uMethod=%d\n", uMethod));
403	return VERR_INVALID_PARAMETER;
404	}
405
406	/*
407	* Execute the seek.
408	*/
409	if (MySetFilePointer(hFile, offSeek, poffActual, aulSeekRecode[uMethod]))
410	return VINF_SUCCESS;
411	return RTErrConvertFromWin32(GetLastError());
412	}
413
414
415	RTR3DECL(int) RTFileRead(RTFILE hFile, void pvBuf, size_t cbToRead, size_t pcbRead)
416	{
417	if (cbToRead <= 0)
418	{
419	if (pcbRead)
420	*pcbRead = 0;
421	return VINF_SUCCESS;
422	}
423	ULONG cbToReadAdj = (ULONG)cbToRead;
424	AssertReturn(cbToReadAdj == cbToRead, VERR_NUMBER_TOO_BIG);
425
426	ULONG cbRead = 0;
427	if (ReadFile((HANDLE)RTFileToNative(hFile), pvBuf, cbToReadAdj, &cbRead, NULL))
428	{
429	if (pcbRead)
430	/* Caller can handle partial reads. */
431	*pcbRead = cbRead;
432	else
433	{
434	/* Caller expects everything to be read. */
435	while (cbToReadAdj > cbRead)
436	{
437	ULONG cbReadPart = 0;
438	if (!ReadFile((HANDLE)RTFileToNative(hFile), (char*)pvBuf + cbRead, cbToReadAdj - cbRead, &cbReadPart, NULL))
439	return RTErrConvertFromWin32(GetLastError());
440	if (cbReadPart == 0)
441	return VERR_EOF;
442	cbRead += cbReadPart;
443	}
444	}
445	return VINF_SUCCESS;
446	}
447
448	/*
449	* If it's a console, we might bump into out of memory conditions in the
450	* ReadConsole call.
451	*/
452	DWORD dwErr = GetLastError();
453	if (dwErr == ERROR_NOT_ENOUGH_MEMORY)
454	{
455	ULONG cbChunk = cbToReadAdj / 2;
456	if (cbChunk > 16*_1K)
457	cbChunk = 16*_1K;
458	else
459	cbChunk = RT_ALIGN_32(cbChunk, 256);
460
461	cbRead = 0;
462	while (cbToReadAdj > cbRead)
463	{
464	ULONG cbToRead = RT_MIN(cbChunk, cbToReadAdj - cbRead);
465	ULONG cbReadPart = 0;
466	if (!ReadFile((HANDLE)RTFileToNative(hFile), (char *)pvBuf + cbRead, cbToRead, &cbReadPart, NULL))
467	{
468	/* If we failed because the buffer is too big, shrink it and
469	try again. */
470	dwErr = GetLastError();
471	if ( dwErr == ERROR_NOT_ENOUGH_MEMORY
472	&& cbChunk > 8)
473	{
474	cbChunk /= 2;
475	continue;
476	}
477	return RTErrConvertFromWin32(dwErr);
478	}
479	cbRead += cbReadPart;
480
481	/* Return if the caller can handle partial reads, otherwise try
482	fill the buffer all the way up. */
483	if (pcbRead)
484	{
485	*pcbRead = cbRead;
486	break;
487	}
488	if (cbReadPart == 0)
489	return VERR_EOF;
490	}
491	return VINF_SUCCESS;
492	}
493
494	return RTErrConvertFromWin32(dwErr);
495	}
496
497
498	RTR3DECL(int) RTFileWrite(RTFILE hFile, const void pvBuf, size_t cbToWrite, size_t pcbWritten)
499	{
500	if (cbToWrite <= 0)
501	return VINF_SUCCESS;
502	ULONG const cbToWriteAdj = (ULONG)cbToWrite;
503	AssertReturn(cbToWriteAdj == cbToWrite, VERR_NUMBER_TOO_BIG);
504
505	ULONG cbWritten = 0;
506	if (WriteFile((HANDLE)RTFileToNative(hFile), pvBuf, cbToWriteAdj, &cbWritten, NULL))
507	{
508	if (pcbWritten)
509	/* Caller can handle partial writes. */
510	pcbWritten = RT_MIN(cbWritten, cbToWriteAdj); / paranoia^3 */
511	else
512	{
513	/* Caller expects everything to be written. */
514	while (cbWritten < cbToWriteAdj)
515	{
516	ULONG cbWrittenPart = 0;
517	if (!WriteFile((HANDLE)RTFileToNative(hFile), (char*)pvBuf + cbWritten,
518	cbToWriteAdj - cbWritten, &cbWrittenPart, NULL))
519	{
520	int rc = RTErrConvertFromWin32(GetLastError());
521	if ( rc == VERR_DISK_FULL
522	&& IsBeyondLimit(hFile, cbToWriteAdj - cbWritten, FILE_CURRENT)
523	)
524	rc = VERR_FILE_TOO_BIG;
525	return rc;
526	}
527	if (cbWrittenPart == 0)
528	return VERR_WRITE_ERROR;
529	cbWritten += cbWrittenPart;
530	}
531	}
532	return VINF_SUCCESS;
533	}
534
535	/*
536	* If it's a console, we might bump into out of memory conditions in the
537	* WriteConsole call.
538	*/
539	DWORD dwErr = GetLastError();
540	if (dwErr == ERROR_NOT_ENOUGH_MEMORY)
541	{
542	ULONG cbChunk = cbToWriteAdj / 2;
543	if (cbChunk > _32K)
544	cbChunk = _32K;
545	else
546	cbChunk = RT_ALIGN_32(cbChunk, 256);
547
548	cbWritten = 0;
549	while (cbWritten < cbToWriteAdj)
550	{
551	ULONG cbToWrite = RT_MIN(cbChunk, cbToWriteAdj - cbWritten);
552	ULONG cbWrittenPart = 0;
553	if (!WriteFile((HANDLE)RTFileToNative(hFile), (const char *)pvBuf + cbWritten, cbToWrite, &cbWrittenPart, NULL))
554	{
555	/* If we failed because the buffer is too big, shrink it and
556	try again. */
557	dwErr = GetLastError();
558	if ( dwErr == ERROR_NOT_ENOUGH_MEMORY
559	&& cbChunk > 8)
560	{
561	cbChunk /= 2;
562	continue;
563	}
564	int rc = RTErrConvertFromWin32(dwErr);
565	if ( rc == VERR_DISK_FULL
566	&& IsBeyondLimit(hFile, cbToWriteAdj - cbWritten, FILE_CURRENT))
567	rc = VERR_FILE_TOO_BIG;
568	return rc;
569	}
570	cbWritten += cbWrittenPart;
571
572	/* Return if the caller can handle partial writes, otherwise try
573	write out everything. */
574	if (pcbWritten)
575	{
576	pcbWritten = RT_MIN(cbWritten, cbToWriteAdj); / paranoia^3 */
577	break;
578	}
579	if (cbWrittenPart == 0)
580	return VERR_WRITE_ERROR;
581	}
582	return VINF_SUCCESS;
583	}
584
585	int rc = RTErrConvertFromWin32(dwErr);
586	if ( rc == VERR_DISK_FULL
587	&& IsBeyondLimit(hFile, cbToWriteAdj - cbWritten, FILE_CURRENT))
588	rc = VERR_FILE_TOO_BIG;
589	return rc;
590	}
591
592
593	RTR3DECL(int) RTFileFlush(RTFILE hFile)
594	{
595	if (!FlushFileBuffers((HANDLE)RTFileToNative(hFile)))
596	{
597	int rc = GetLastError();
598	Log(("FlushFileBuffers failed with %d\n", rc));
599	return RTErrConvertFromWin32(rc);
600	}
601	return VINF_SUCCESS;
602	}
603
604
605	RTR3DECL(int) RTFileSetSize(RTFILE hFile, uint64_t cbSize)
606	{
607	/*
608	* Get current file pointer.
609	*/
610	int rc;
611	uint64_t offCurrent;
612	if (MySetFilePointer(hFile, 0, &offCurrent, FILE_CURRENT))
613	{
614	/*
615	* Set new file pointer.
616	*/
617	if (MySetFilePointer(hFile, cbSize, NULL, FILE_BEGIN))
618	{
619	/* set file pointer */
620	if (SetEndOfFile((HANDLE)RTFileToNative(hFile)))
621	{
622	/*
623	* Restore file pointer and return.
624	* If the old pointer was beyond the new file end, ignore failure.
625	*/
626	if ( MySetFilePointer(hFile, offCurrent, NULL, FILE_BEGIN)
627	\|\| offCurrent > cbSize)
628	return VINF_SUCCESS;
629	}
630
631	/*
632	* Failed, try restoring the file pointer.
633	*/
634	rc = GetLastError();
635	MySetFilePointer(hFile, offCurrent, NULL, FILE_BEGIN);
636	}
637	else
638	rc = GetLastError();
639	}
640	else
641	rc = GetLastError();
642
643	return RTErrConvertFromWin32(rc);
644	}
645
646
647	RTR3DECL(int) RTFileGetSize(RTFILE hFile, uint64_t *pcbSize)
648	{
649	/*
650	* GetFileSize works for most handles.
651	*/
652	ULARGE_INTEGER Size;
653	Size.LowPart = GetFileSize((HANDLE)RTFileToNative(hFile), &Size.HighPart);
654	if (Size.LowPart != INVALID_FILE_SIZE)
655	{
656	*pcbSize = Size.QuadPart;
657	return VINF_SUCCESS;
658	}
659	int rc = RTErrConvertFromWin32(GetLastError());
660
661	/*
662	* Could it be a volume or a disk?
663	*/
664	DISK_GEOMETRY DriveGeo;
665	DWORD cbDriveGeo;
666	if (DeviceIoControl((HANDLE)RTFileToNative(hFile),
667	IOCTL_DISK_GET_DRIVE_GEOMETRY, NULL, 0,
668	&DriveGeo, sizeof(DriveGeo), &cbDriveGeo, NULL))
669	{
670	if ( DriveGeo.MediaType == FixedMedia
671	\|\| DriveGeo.MediaType == RemovableMedia)
672	{
673	*pcbSize = DriveGeo.Cylinders.QuadPart
674	* DriveGeo.TracksPerCylinder
675	* DriveGeo.SectorsPerTrack
676	* DriveGeo.BytesPerSector;
677
678	GET_LENGTH_INFORMATION DiskLenInfo;
679	DWORD Ignored;
680	if (DeviceIoControl((HANDLE)RTFileToNative(hFile),
681	IOCTL_DISK_GET_LENGTH_INFO, NULL, 0,
682	&DiskLenInfo, sizeof(DiskLenInfo), &Ignored, (LPOVERLAPPED)NULL))
683	{
684	/* IOCTL_DISK_GET_LENGTH_INFO is supported -- override cbSize. */
685	*pcbSize = DiskLenInfo.Length.QuadPart;
686	}
687	return VINF_SUCCESS;
688	}
689	}
690
691	/*
692	* Return the GetFileSize result if not a volume/disk.
693	*/
694	return rc;
695	}
696
697
698	RTR3DECL(int) RTFileGetMaxSizeEx(RTFILE hFile, PRTFOFF pcbMax)
699	{
700	/** @todo r=bird:
701	* We might have to make this code OS version specific... In the worse
702	* case, we'll have to try GetVolumeInformationByHandle on vista and fall
703	* back on NtQueryVolumeInformationFile(,,,, FileFsAttributeInformation)
704	* else where, and check for known file system names. (For LAN shares we'll
705	* have to figure out the remote file system.) */
706	RT_NOREF_PV(hFile); RT_NOREF_PV(pcbMax);
707	return VERR_NOT_IMPLEMENTED;
708	}
709
710
711	RTR3DECL(bool) RTFileIsValid(RTFILE hFile)
712	{
713	if (hFile != NIL_RTFILE)
714	{
715	DWORD dwType = GetFileType((HANDLE)RTFileToNative(hFile));
716	switch (dwType)
717	{
718	case FILE_TYPE_CHAR:
719	case FILE_TYPE_DISK:
720	case FILE_TYPE_PIPE:
721	case FILE_TYPE_REMOTE:
722	return true;
723
724	case FILE_TYPE_UNKNOWN:
725	if (GetLastError() == NO_ERROR)
726	return true;
727	break;
728
729	default:
730	break;
731	}
732	}
733	return false;
734	}
735
736
737	#define LOW_DWORD(u64) ((DWORD)u64)
738	#define HIGH_DWORD(u64) (((DWORD *)&u64)[1])
739
740	RTR3DECL(int) RTFileLock(RTFILE hFile, unsigned fLock, int64_t offLock, uint64_t cbLock)
741	{
742	Assert(offLock >= 0);
743
744	/* Check arguments. */
745	if (fLock & ~RTFILE_LOCK_MASK)
746	{
747	AssertMsgFailed(("Invalid fLock=%08X\n", fLock));
748	return VERR_INVALID_PARAMETER;
749	}
750
751	/* Prepare flags. */
752	Assert(RTFILE_LOCK_WRITE);
753	DWORD dwFlags = (fLock & RTFILE_LOCK_WRITE) ? LOCKFILE_EXCLUSIVE_LOCK : 0;
754	Assert(RTFILE_LOCK_WAIT);
755	if (!(fLock & RTFILE_LOCK_WAIT))
756	dwFlags \|= LOCKFILE_FAIL_IMMEDIATELY;
757
758	/* Windows structure. */
759	OVERLAPPED Overlapped;
760	memset(&Overlapped, 0, sizeof(Overlapped));
761	Overlapped.Offset = LOW_DWORD(offLock);
762	Overlapped.OffsetHigh = HIGH_DWORD(offLock);
763
764	/* Note: according to Microsoft, LockFileEx API call is available starting from NT 3.5 */
765	if (LockFileEx((HANDLE)RTFileToNative(hFile), dwFlags, 0, LOW_DWORD(cbLock), HIGH_DWORD(cbLock), &Overlapped))
766	return VINF_SUCCESS;
767
768	return RTErrConvertFromWin32(GetLastError());
769	}
770
771
772	RTR3DECL(int) RTFileChangeLock(RTFILE hFile, unsigned fLock, int64_t offLock, uint64_t cbLock)
773	{
774	Assert(offLock >= 0);
775
776	/* Check arguments. */
777	if (fLock & ~RTFILE_LOCK_MASK)
778	{
779	AssertMsgFailed(("Invalid fLock=%08X\n", fLock));
780	return VERR_INVALID_PARAMETER;
781	}
782
783	/* Remove old lock. */
784	int rc = RTFileUnlock(hFile, offLock, cbLock);
785	if (RT_FAILURE(rc))
786	return rc;
787
788	/* Set new lock. */
789	rc = RTFileLock(hFile, fLock, offLock, cbLock);
790	if (RT_SUCCESS(rc))
791	return rc;
792
793	/* Try to restore old lock. */
794	unsigned fLockOld = (fLock & RTFILE_LOCK_WRITE) ? fLock & ~RTFILE_LOCK_WRITE : fLock \| RTFILE_LOCK_WRITE;
795	rc = RTFileLock(hFile, fLockOld, offLock, cbLock);
796	if (RT_SUCCESS(rc))
797	return VERR_FILE_LOCK_VIOLATION;
798	else
799	return VERR_FILE_LOCK_LOST;
800	}
801
802
803	RTR3DECL(int) RTFileUnlock(RTFILE hFile, int64_t offLock, uint64_t cbLock)
804	{
805	Assert(offLock >= 0);
806
807	if (UnlockFile((HANDLE)RTFileToNative(hFile),
808	LOW_DWORD(offLock), HIGH_DWORD(offLock),
809	LOW_DWORD(cbLock), HIGH_DWORD(cbLock)))
810	return VINF_SUCCESS;
811
812	return RTErrConvertFromWin32(GetLastError());
813	}
814
815
816
817	RTR3DECL(int) RTFileQueryInfo(RTFILE hFile, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAdditionalAttribs)
818	{
819	/*
820	* Validate input.
821	*/
822	if (hFile == NIL_RTFILE)
823	{
824	AssertMsgFailed(("Invalid hFile=%RTfile\n", hFile));
825	return VERR_INVALID_PARAMETER;
826	}
827	if (!pObjInfo)
828	{
829	AssertMsgFailed(("Invalid pObjInfo=%p\n", pObjInfo));
830	return VERR_INVALID_PARAMETER;
831	}
832	if ( enmAdditionalAttribs < RTFSOBJATTRADD_NOTHING
833	\|\| enmAdditionalAttribs > RTFSOBJATTRADD_LAST)
834	{
835	AssertMsgFailed(("Invalid enmAdditionalAttribs=%p\n", enmAdditionalAttribs));
836	return VERR_INVALID_PARAMETER;
837	}
838
839	/*
840	* Query file info.
841	*/
842	HANDLE hHandle = (HANDLE)RTFileToNative(hFile);
843	#if 1
844	uint64_t auBuf[168 / sizeof(uint64_t)]; /* Missing FILE_ALL_INFORMATION here. */
845	int rc = rtPathNtQueryInfoFromHandle(hFile, auBuf, sizeof(auBuf), pObjInfo, enmAdditionalAttribs, NULL, 0);
846	if (RT_SUCCESS(rc))
847	return rc;
848
849	/*
850	* Console I/O handles make trouble here. On older windows versions they
851	* end up with ERROR_INVALID_HANDLE when handed to the above API, while on
852	* more recent ones they cause different errors to appear.
853	*
854	* Thus, we must ignore the latter and doubly verify invalid handle claims.
855	* We use the undocumented VerifyConsoleIoHandle to do this, falling back on
856	* GetFileType should it not be there.
857	*/
858	if ( rc == VERR_INVALID_HANDLE
859	\|\| rc == VERR_ACCESS_DENIED
860	\|\| rc == VERR_UNEXPECTED_FS_OBJ_TYPE)
861	{
862	static PFNVERIFYCONSOLEIOHANDLE s_pfnVerifyConsoleIoHandle = NULL;
863	static bool volatile s_fInitialized = false;
864	PFNVERIFYCONSOLEIOHANDLE pfnVerifyConsoleIoHandle;
865	if (s_fInitialized)
866	pfnVerifyConsoleIoHandle = s_pfnVerifyConsoleIoHandle;
867	else
868	{
869	pfnVerifyConsoleIoHandle = (PFNVERIFYCONSOLEIOHANDLE)RTLdrGetSystemSymbol("kernel32.dll", "VerifyConsoleIoHandle");
870	ASMAtomicWriteBool(&s_fInitialized, true);
871	}
872	if ( pfnVerifyConsoleIoHandle
873	? !pfnVerifyConsoleIoHandle(hHandle)
874	: GetFileType(hHandle) == FILE_TYPE_UNKNOWN && GetLastError() != NO_ERROR)
875	return VERR_INVALID_HANDLE;
876	}
877	/*
878	* On Windows 10 and (hopefully) 8.1 we get ERROR_INVALID_FUNCTION with console
879	* I/O handles and null device handles. We must ignore these just like the
880	* above invalid handle error.
881	*/
882	else if (rc != VERR_INVALID_FUNCTION && rc != VERR_IO_BAD_COMMAND)
883	return rc;
884
885	RT_ZERO(*pObjInfo);
886	pObjInfo->Attr.enmAdditional = enmAdditionalAttribs;
887	pObjInfo->Attr.fMode = rtFsModeFromDos(RTFS_DOS_NT_DEVICE, "", 0, 0);
888	return VINF_SUCCESS;
889	#else
890
891	BY_HANDLE_FILE_INFORMATION Data;
892	if (!GetFileInformationByHandle(hHandle, &Data))
893	{
894	/*
895	* Console I/O handles make trouble here. On older windows versions they
896	* end up with ERROR_INVALID_HANDLE when handed to the above API, while on
897	* more recent ones they cause different errors to appear.
898	*
899	* Thus, we must ignore the latter and doubly verify invalid handle claims.
900	* We use the undocumented VerifyConsoleIoHandle to do this, falling back on
901	* GetFileType should it not be there.
902	*/
903	DWORD dwErr = GetLastError();
904	if (dwErr == ERROR_INVALID_HANDLE)
905	{
906	static PFNVERIFYCONSOLEIOHANDLE s_pfnVerifyConsoleIoHandle = NULL;
907	static bool volatile s_fInitialized = false;
908	PFNVERIFYCONSOLEIOHANDLE pfnVerifyConsoleIoHandle;
909	if (s_fInitialized)
910	pfnVerifyConsoleIoHandle = s_pfnVerifyConsoleIoHandle;
911	else
912	{
913	pfnVerifyConsoleIoHandle = (PFNVERIFYCONSOLEIOHANDLE)RTLdrGetSystemSymbol("kernel32.dll", "VerifyConsoleIoHandle");
914	ASMAtomicWriteBool(&s_fInitialized, true);
915	}
916	if ( pfnVerifyConsoleIoHandle
917	? !pfnVerifyConsoleIoHandle(hHandle)
918	: GetFileType(hHandle) == FILE_TYPE_UNKNOWN && GetLastError() != NO_ERROR)
919	return VERR_INVALID_HANDLE;
920	}
921	/*
922	* On Windows 10 and (hopefully) 8.1 we get ERROR_INVALID_FUNCTION with console I/O
923	* handles. We must ignore these just like the above invalid handle error.
924	*/
925	else if (dwErr != ERROR_INVALID_FUNCTION)
926	return RTErrConvertFromWin32(dwErr);
927
928	RT_ZERO(Data);
929	Data.dwFileAttributes = RTFS_DOS_NT_DEVICE;
930	}
931
932	/*
933	* Setup the returned data.
934	*/
935	pObjInfo->cbObject = ((uint64_t)Data.nFileSizeHigh << 32)
936	\| (uint64_t)Data.nFileSizeLow;
937	pObjInfo->cbAllocated = pObjInfo->cbObject;
938
939	Assert(sizeof(uint64_t) == sizeof(Data.ftCreationTime));
940	RTTimeSpecSetNtTime(&pObjInfo->BirthTime, (uint64_t )&Data.ftCreationTime);
941	RTTimeSpecSetNtTime(&pObjInfo->AccessTime, (uint64_t )&Data.ftLastAccessTime);
942	RTTimeSpecSetNtTime(&pObjInfo->ModificationTime, (uint64_t )&Data.ftLastWriteTime);
943	pObjInfo->ChangeTime = pObjInfo->ModificationTime;
944
945	pObjInfo->Attr.fMode = rtFsModeFromDos((Data.dwFileAttributes << RTFS_DOS_SHIFT) & RTFS_DOS_MASK_NT, "", 0,
946	RTFSMODE_SYMLINK_REPARSE_TAG /* (symlink or not, doesn't usually matter here) */);
947
948	/*
949	* Requested attributes (we cannot provide anything actually).
950	*/
951	switch (enmAdditionalAttribs)
952	{
953	case RTFSOBJATTRADD_NOTHING:
954	pObjInfo->Attr.enmAdditional = RTFSOBJATTRADD_NOTHING;
955	break;
956
957	case RTFSOBJATTRADD_UNIX:
958	pObjInfo->Attr.enmAdditional = RTFSOBJATTRADD_UNIX;
959	pObjInfo->Attr.u.Unix.uid = ~0U;
960	pObjInfo->Attr.u.Unix.gid = ~0U;
961	pObjInfo->Attr.u.Unix.cHardlinks = Data.nNumberOfLinks ? Data.nNumberOfLinks : 1;
962	pObjInfo->Attr.u.Unix.INodeIdDevice = Data.dwVolumeSerialNumber;
963	pObjInfo->Attr.u.Unix.INodeId = RT_MAKE_U64(Data.nFileIndexLow, Data.nFileIndexHigh);
964	pObjInfo->Attr.u.Unix.fFlags = 0;
965	pObjInfo->Attr.u.Unix.GenerationId = 0;
966	pObjInfo->Attr.u.Unix.Device = 0;
967	break;
968
969	case RTFSOBJATTRADD_UNIX_OWNER:
970	pObjInfo->Attr.enmAdditional = RTFSOBJATTRADD_UNIX_OWNER;
971	pObjInfo->Attr.u.UnixOwner.uid = ~0U;
972	pObjInfo->Attr.u.UnixOwner.szName[0] = '\0'; /** @todo return something sensible here. */
973	break;
974
975	case RTFSOBJATTRADD_UNIX_GROUP:
976	pObjInfo->Attr.enmAdditional = RTFSOBJATTRADD_UNIX_GROUP;
977	pObjInfo->Attr.u.UnixGroup.gid = ~0U;
978	pObjInfo->Attr.u.UnixGroup.szName[0] = '\0';
979	break;
980
981	case RTFSOBJATTRADD_EASIZE:
982	pObjInfo->Attr.enmAdditional = RTFSOBJATTRADD_EASIZE;
983	pObjInfo->Attr.u.EASize.cb = 0;
984	break;
985
986	default:
987	AssertMsgFailed(("Impossible!\n"));
988	return VERR_INTERNAL_ERROR;
989	}
990
991	return VINF_SUCCESS;
992	#endif
993	}
994
995
996	RTR3DECL(int) RTFileSetTimes(RTFILE hFile, PCRTTIMESPEC pAccessTime, PCRTTIMESPEC pModificationTime,
997	PCRTTIMESPEC pChangeTime, PCRTTIMESPEC pBirthTime)
998	{
999	RT_NOREF_PV(pChangeTime); /* Not exposed thru the windows API we're using. */
1000
1001	if (!pAccessTime && !pModificationTime && !pBirthTime)
1002	return VINF_SUCCESS; /* NOP */
1003
1004	FILETIME CreationTimeFT;
1005	PFILETIME pCreationTimeFT = NULL;
1006	if (pBirthTime)
1007	pCreationTimeFT = RTTimeSpecGetNtFileTime(pBirthTime, &CreationTimeFT);
1008
1009	FILETIME LastAccessTimeFT;
1010	PFILETIME pLastAccessTimeFT = NULL;
1011	if (pAccessTime)
1012	pLastAccessTimeFT = RTTimeSpecGetNtFileTime(pAccessTime, &LastAccessTimeFT);
1013
1014	FILETIME LastWriteTimeFT;
1015	PFILETIME pLastWriteTimeFT = NULL;
1016	if (pModificationTime)
1017	pLastWriteTimeFT = RTTimeSpecGetNtFileTime(pModificationTime, &LastWriteTimeFT);
1018
1019	int rc = VINF_SUCCESS;
1020	if (!SetFileTime((HANDLE)RTFileToNative(hFile), pCreationTimeFT, pLastAccessTimeFT, pLastWriteTimeFT))
1021	{
1022	DWORD Err = GetLastError();
1023	rc = RTErrConvertFromWin32(Err);
1024	Log(("RTFileSetTimes(%RTfile, %p, %p, %p, %p): SetFileTime failed with lasterr %d (%Rrc)\n",
1025	hFile, pAccessTime, pModificationTime, pChangeTime, pBirthTime, Err, rc));
1026	}
1027	return rc;
1028	}
1029
1030
1031	#if 0 /* RTFileSetMode is implemented by RTFileSetMode-r3-nt.cpp */
1032	/* This comes from a source file with a different set of system headers (DDK)
1033	* so it can't be declared in a common header, like internal/file.h.
1034	*/
1035	extern int rtFileNativeSetAttributes(HANDLE FileHandle, ULONG FileAttributes);
1036
1037
1038	RTR3DECL(int) RTFileSetMode(RTFILE hFile, RTFMODE fMode)
1039	{
1040	/*
1041	* Normalize the mode and call the API.
1042	*/
1043	fMode = rtFsModeNormalize(fMode, NULL, 0);
1044	if (!rtFsModeIsValid(fMode))
1045	return VERR_INVALID_PARAMETER;
1046
1047	ULONG FileAttributes = (fMode & RTFS_DOS_MASK) >> RTFS_DOS_SHIFT;
1048	int Err = rtFileNativeSetAttributes((HANDLE)hFile, FileAttributes);
1049	if (Err != ERROR_SUCCESS)
1050	{
1051	int rc = RTErrConvertFromWin32(Err);
1052	Log(("RTFileSetMode(%RTfile, %RTfmode): rtFileNativeSetAttributes (0x%08X) failed with err %d (%Rrc)\n",
1053	hFile, fMode, FileAttributes, Err, rc));
1054	return rc;
1055	}
1056	return VINF_SUCCESS;
1057	}
1058	#endif
1059
1060
1061	/* RTFileQueryFsSizes is implemented by ../nt/RTFileQueryFsSizes-nt.cpp */
1062
1063
1064	RTR3DECL(int) RTFileDelete(const char *pszFilename)
1065	{
1066	PRTUTF16 pwszFilename;
1067	int rc = RTPathWinFromUtf8(&pwszFilename, pszFilename, 0 /fFlags/);
1068	if (RT_SUCCESS(rc))
1069	{
1070	if (!DeleteFileW(pwszFilename))
1071	rc = RTErrConvertFromWin32(GetLastError());
1072	RTPathWinFree(pwszFilename);
1073	}
1074
1075	return rc;
1076	}
1077
1078
1079	RTDECL(int) RTFileRename(const char pszSrc, const char pszDst, unsigned fRename)
1080	{
1081	/*
1082	* Validate input.
1083	*/
1084	AssertMsgReturn(VALID_PTR(pszSrc), ("%p\n", pszSrc), VERR_INVALID_POINTER);
1085	AssertMsgReturn(VALID_PTR(pszDst), ("%p\n", pszDst), VERR_INVALID_POINTER);
1086	AssertMsgReturn(!(fRename & ~RTPATHRENAME_FLAGS_REPLACE), ("%#x\n", fRename), VERR_INVALID_PARAMETER);
1087
1088	/*
1089	* Hand it on to the worker.
1090	*/
1091	int rc = rtPathWin32MoveRename(pszSrc, pszDst,
1092	fRename & RTPATHRENAME_FLAGS_REPLACE ? MOVEFILE_REPLACE_EXISTING : 0,
1093	RTFS_TYPE_FILE);
1094
1095	LogFlow(("RTFileMove(%p:{%s}, %p:{%s}, %#x): returns %Rrc\n",
1096	pszSrc, pszSrc, pszDst, pszDst, fRename, rc));
1097	return rc;
1098
1099	}
1100
1101
1102	RTDECL(int) RTFileMove(const char pszSrc, const char pszDst, unsigned fMove)
1103	{
1104	/*
1105	* Validate input.
1106	*/
1107	AssertMsgReturn(VALID_PTR(pszSrc), ("%p\n", pszSrc), VERR_INVALID_POINTER);
1108	AssertMsgReturn(VALID_PTR(pszDst), ("%p\n", pszDst), VERR_INVALID_POINTER);
1109	AssertMsgReturn(!(fMove & ~RTFILEMOVE_FLAGS_REPLACE), ("%#x\n", fMove), VERR_INVALID_PARAMETER);
1110
1111	/*
1112	* Hand it on to the worker.
1113	*/
1114	int rc = rtPathWin32MoveRename(pszSrc, pszDst,
1115	fMove & RTFILEMOVE_FLAGS_REPLACE
1116	? MOVEFILE_COPY_ALLOWED \| MOVEFILE_REPLACE_EXISTING
1117	: MOVEFILE_COPY_ALLOWED,
1118	RTFS_TYPE_FILE);
1119
1120	LogFlow(("RTFileMove(%p:{%s}, %p:{%s}, %#x): returns %Rrc\n",
1121	pszSrc, pszSrc, pszDst, pszDst, fMove, rc));
1122	return rc;
1123	}
1124

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source: vbox/trunk/src/VBox/Runtime/r3/win/fileio-win.cpp@ 76902

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