path-win.cpp@ 25240

Last change on this file since 25240 was 23375, checked in by vboxsync, 15 years ago
Very annoying assertion
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1	/* $Id: path-win.cpp 23375 2009-09-28 13:14:29Z vboxsync $ */
2	/** @file
3	* IPRT - Path manipulation.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 Sun Microsystems, Inc.
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. 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	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
27	* Clara, CA 95054 USA or visit http://www.sun.com if you need
28	* additional information or have any questions.
29	*/
30
31
32	/*******************************************************************************
33	* Header Files *
34	*******************************************************************************/
35	#define LOG_GROUP RTLOGGROUP_PATH
36	#include <Windows.h>
37
38	#include <iprt/path.h>
39	#include <iprt/assert.h>
40	#include <iprt/string.h>
41	#include <iprt/time.h>
42	#include <iprt/mem.h>
43	#include <iprt/param.h>
44	#include <iprt/log.h>
45	#include <iprt/err.h>
46	#include "internal/path.h"
47	#include "internal/fs.h"
48
49
50	/**
51	* Get the real (no symlinks, no . or .. components) path, must exist.
52	*
53	* @returns iprt status code.
54	* @param pszPath The path to resolve.
55	* @param pszRealPath Where to store the real path.
56	* @param cchRealPath Size of the buffer.
57	*/
58	RTDECL(int) RTPathReal(const char pszPath, char pszRealPath, size_t cchRealPath)
59	{
60	/*
61	* Convert to UTF-16, call Win32 APIs, convert back.
62	*/
63	PRTUTF16 pwszPath;
64	int rc = RTStrToUtf16(pszPath, &pwszPath);
65	if (!RT_SUCCESS(rc))
66	return (rc);
67
68	LPWSTR lpFile;
69	WCHAR wsz[RTPATH_MAX];
70	rc = GetFullPathNameW((LPCWSTR)pwszPath, RT_ELEMENTS(wsz), &wsz[0], &lpFile);
71	if (rc > 0 && rc < RT_ELEMENTS(wsz))
72	{
73	/* Check that it exists. (Use RTPathAbs() to just resolve the name.) */
74	DWORD dwAttr = GetFileAttributesW(wsz);
75	if (dwAttr != INVALID_FILE_ATTRIBUTES)
76	rc = RTUtf16ToUtf8Ex((PRTUTF16)&wsz[0], RTSTR_MAX, &pszRealPath, cchRealPath, NULL);
77	else
78	rc = RTErrConvertFromWin32(GetLastError());
79	}
80	else if (rc <= 0)
81	rc = RTErrConvertFromWin32(GetLastError());
82	else
83	rc = VERR_FILENAME_TOO_LONG;
84
85	RTUtf16Free(pwszPath);
86
87	return rc;
88	}
89
90
91	/**
92	* Get the absolute path (no symlinks, no . or .. components), doesn't have to exit.
93	*
94	* @returns iprt status code.
95	* @param pszPath The path to resolve.
96	* @param pszAbsPath Where to store the absolute path.
97	* @param cchAbsPath Size of the buffer.
98	*/
99	RTDECL(int) RTPathAbs(const char pszPath, char pszAbsPath, size_t cchAbsPath)
100	{
101	/*
102	* Validation.
103	*/
104	AssertPtr(pszAbsPath);
105	AssertPtr(pszPath);
106	if (RT_UNLIKELY(!*pszPath))
107	return VERR_INVALID_PARAMETER;
108
109	/*
110	* Convert to UTF-16, call Win32 API, convert back.
111	*/
112	LPWSTR pwszPath;
113	int rc = RTStrToUtf16(pszPath, &pwszPath);
114	if (!RT_SUCCESS(rc))
115	return (rc);
116
117	LPWSTR pwszFile; /* Ignored */
118	RTUTF16 wsz[RTPATH_MAX];
119	rc = GetFullPathNameW(pwszPath, RT_ELEMENTS(wsz), &wsz[0], &pwszFile);
120	if (rc > 0 && rc < RT_ELEMENTS(wsz))
121	{
122	size_t cch;
123	rc = RTUtf16ToUtf8Ex(&wsz[0], RTSTR_MAX, &pszAbsPath, cchAbsPath, &cch);
124	if (RT_SUCCESS(rc))
125	{
126	/*
127	* Remove trailing slash if the path may be pointing to a directory.
128	* (See posix variant.)
129	*/
130	if ( cch > 1
131	&& RTPATH_IS_SLASH(pszAbsPath[cch - 1])
132	&& !RTPATH_IS_VOLSEP(pszAbsPath[cch - 2])
133	&& !RTPATH_IS_SLASH(pszAbsPath[cch - 2]))
134	pszAbsPath[cch - 1] = '\0';
135	}
136	}
137	else if (rc <= 0)
138	rc = RTErrConvertFromWin32(GetLastError());
139	else
140	rc = VERR_FILENAME_TOO_LONG;
141
142	RTUtf16Free(pwszPath);
143	return rc;
144	}
145
146
147	/**
148	* Gets the user home directory.
149	*
150	* @returns iprt status code.
151	* @param pszPath Buffer where to store the path.
152	* @param cchPath Buffer size in bytes.
153	*/
154	RTDECL(int) RTPathUserHome(char *pszPath, size_t cchPath)
155	{
156	RTUTF16 wszPath[RTPATH_MAX];
157	DWORD dwAttr;
158
159	/*
160	* There are multiple definitions for what WE think of as user home...
161	*/
162	if ( !GetEnvironmentVariableW(L"HOME", &wszPath[0], RTPATH_MAX)
163	\|\| (dwAttr = GetFileAttributesW(&wszPath[0])) == INVALID_FILE_ATTRIBUTES
164	\|\| !(dwAttr & FILE_ATTRIBUTE_DIRECTORY))
165	{
166	if ( !GetEnvironmentVariableW(L"USERPROFILE", &wszPath[0], RTPATH_MAX)
167	\|\| (dwAttr = GetFileAttributesW(&wszPath[0])) == INVALID_FILE_ATTRIBUTES
168	\|\| !(dwAttr & FILE_ATTRIBUTE_DIRECTORY))
169	{
170	/* %HOMEDRIVE%%HOMEPATH% */
171	if (!GetEnvironmentVariableW(L"HOMEDRIVE", &wszPath[0], RTPATH_MAX))
172	return VERR_PATH_NOT_FOUND;
173	size_t const cwc = RTUtf16Len(&wszPath[0]);
174	if ( !GetEnvironmentVariableW(L"HOMEPATH", &wszPath[cwc], RTPATH_MAX - (DWORD)cwc)
175	\|\| (dwAttr = GetFileAttributesW(&wszPath[0])) == INVALID_FILE_ATTRIBUTES
176	\|\| !(dwAttr & FILE_ATTRIBUTE_DIRECTORY))
177	return VERR_PATH_NOT_FOUND;
178	}
179	}
180
181	/*
182	* Convert and return.
183	*/
184	return RTUtf16ToUtf8Ex(&wszPath[0], RTSTR_MAX, &pszPath, cchPath, NULL);
185	}
186
187
188	RTR3DECL(int) RTPathQueryInfo(const char *pszPath, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAdditionalAttribs)
189	{
190	return RTPathQueryInfoEx(pszPath, pObjInfo, enmAdditionalAttribs, RTPATH_F_ON_LINK);
191	}
192
193
194	RTR3DECL(int) RTPathQueryInfoEx(const char *pszPath, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAdditionalAttribs, uint32_t fFlags)
195	{
196	/*
197	* Validate input.
198	*/
199	AssertPtrReturn(pszPath, VERR_INVALID_POINTER);
200	AssertReturn(*pszPath, VERR_INVALID_PARAMETER);
201	AssertPtrReturn(pObjInfo, VERR_INVALID_POINTER);
202	AssertMsgReturn( enmAdditionalAttribs >= RTFSOBJATTRADD_NOTHING
203	&& enmAdditionalAttribs <= RTFSOBJATTRADD_LAST,
204	("Invalid enmAdditionalAttribs=%p\n", enmAdditionalAttribs),
205	VERR_INVALID_PARAMETER);
206	AssertMsgReturn(RTPATH_F_IS_VALID(fFlags, 0), ("%#x\n", fFlags), VERR_INVALID_PARAMETER);
207
208	/*
209	* Query file info.
210	*/
211	WIN32_FILE_ATTRIBUTE_DATA Data;
212	#ifndef RT_DONT_CONVERT_FILENAMES
213	PRTUTF16 pwszPath;
214	int rc = RTStrToUtf16(pszPath, &pwszPath);
215	if (RT_FAILURE(rc))
216	return rc;
217	if (!GetFileAttributesExW(pwszPath, GetFileExInfoStandard, &Data))
218	{
219	/* Fallback to FindFileFirst in case of sharing violation. */
220	if (GetLastError() == ERROR_SHARING_VIOLATION)
221	{
222	WIN32_FIND_DATAW FindData;
223	HANDLE hDir = FindFirstFileW(pwszPath, &FindData);
224	if (hDir == INVALID_HANDLE_VALUE)
225	{
226	rc = RTErrConvertFromWin32(GetLastError());
227	RTUtf16Free(pwszPath);
228	return rc;
229	}
230	FindClose(hDir);
231	Data.dwFileAttributes = FindData.dwFileAttributes;
232	Data.ftCreationTime = FindData.ftCreationTime;
233	Data.ftLastAccessTime = FindData.ftLastAccessTime;
234	Data.ftLastWriteTime = FindData.ftLastWriteTime;
235	Data.nFileSizeHigh = FindData.nFileSizeHigh;
236	Data.nFileSizeLow = FindData.nFileSizeLow;
237	}
238	else
239	{
240	rc = RTErrConvertFromWin32(GetLastError());
241	RTUtf16Free(pwszPath);
242	return rc;
243	}
244	}
245	RTUtf16Free(pwszPath);
246	#else
247	if (!GetFileAttributesExA(pszPath, GetFileExInfoStandard, &Data))
248	{
249	/* Fallback to FindFileFirst in case of sharing violation. */
250	if (GetLastError() != ERROR_SHARING_VIOLATION)
251	return RTErrConvertFromWin32(GetLastError());
252	WIN32_FIND_DATAA FindData;
253	HANDLE hDir = FindFirstFileA(pszPath, &FindData);
254	if (hDir == INVALID_HANDLE_VALUE)
255	return RTErrConvertFromWin32(GetLastError());
256	FindClose(hDir);
257	Data.dwFileAttributes = FindData.dwFileAttributes;
258	Data.ftCreationTime = FindData.ftCreationTime;
259	Data.ftLastAccessTime = FindData.ftLastAccessTime;
260	Data.ftLastWriteTime = FindData.ftLastWriteTime;
261	Data.nFileSizeHigh = FindData.nFileSizeHigh;
262	Data.nFileSizeLow = FindData.nFileSizeLow;
263	}
264	#endif
265	if ( (fFlags & RTPATH_F_FOLLOW_LINK)
266	&& (Data.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT))
267	{
268	#ifndef DEBUG_sandervl
269	AssertFailed();
270	#endif
271	/** @todo Symlinks: RTPathQueryInfoEx is not handling symbolic links
272	* correctly on Windows. (Both GetFileAttributesEx and FileFindFirst
273	* will return info about the symlink.) */
274	}
275
276	/*
277	* Setup the returned data.
278	*/
279	pObjInfo->cbObject = ((uint64_t)Data.nFileSizeHigh << 32)
280	\| (uint64_t)Data.nFileSizeLow;
281	pObjInfo->cbAllocated = pObjInfo->cbObject;
282
283	Assert(sizeof(uint64_t) == sizeof(Data.ftCreationTime));
284	RTTimeSpecSetNtTime(&pObjInfo->BirthTime, (uint64_t )&Data.ftCreationTime);
285	RTTimeSpecSetNtTime(&pObjInfo->AccessTime, (uint64_t )&Data.ftLastAccessTime);
286	RTTimeSpecSetNtTime(&pObjInfo->ModificationTime, (uint64_t )&Data.ftLastWriteTime);
287	pObjInfo->ChangeTime = pObjInfo->ModificationTime;
288
289	pObjInfo->Attr.fMode = rtFsModeFromDos((Data.dwFileAttributes << RTFS_DOS_SHIFT) & RTFS_DOS_MASK_NT,
290	pszPath, strlen(pszPath));
291
292	/*
293	* Requested attributes (we cannot provide anything actually).
294	*/
295	switch (enmAdditionalAttribs)
296	{
297	case RTFSOBJATTRADD_EASIZE:
298	pObjInfo->Attr.enmAdditional = RTFSOBJATTRADD_EASIZE;
299	pObjInfo->Attr.u.EASize.cb = 0;
300	break;
301
302	case RTFSOBJATTRADD_UNIX:
303	pObjInfo->Attr.enmAdditional = RTFSOBJATTRADD_UNIX;
304	pObjInfo->Attr.u.Unix.uid = ~0U;
305	pObjInfo->Attr.u.Unix.gid = ~0U;
306	pObjInfo->Attr.u.Unix.cHardlinks = 1;
307	pObjInfo->Attr.u.Unix.INodeIdDevice = 0; /** @todo use volume serial number */
308	pObjInfo->Attr.u.Unix.INodeId = 0; /** @todo use fileid (see GetFileInformationByHandle). */
309	pObjInfo->Attr.u.Unix.fFlags = 0;
310	pObjInfo->Attr.u.Unix.GenerationId = 0;
311	pObjInfo->Attr.u.Unix.Device = 0;
312	break;
313
314	case RTFSOBJATTRADD_NOTHING:
315	pObjInfo->Attr.enmAdditional = RTFSOBJATTRADD_NOTHING;
316	break;
317
318	default:
319	AssertMsgFailed(("Impossible!\n"));
320	return VERR_INTERNAL_ERROR;
321	}
322
323	return VINF_SUCCESS;
324	}
325
326
327	RTR3DECL(int) RTPathSetTimes(const char *pszPath, PCRTTIMESPEC pAccessTime, PCRTTIMESPEC pModificationTime,
328	PCRTTIMESPEC pChangeTime, PCRTTIMESPEC pBirthTime)
329	{
330	return RTPathSetTimesEx(pszPath, pAccessTime, pModificationTime, pChangeTime, pBirthTime, RTPATH_F_ON_LINK);
331	}
332
333
334	RTR3DECL(int) RTPathSetTimesEx(const char *pszPath, PCRTTIMESPEC pAccessTime, PCRTTIMESPEC pModificationTime,
335	PCRTTIMESPEC pChangeTime, PCRTTIMESPEC pBirthTime, uint32_t fFlags)
336	{
337	/*
338	* Validate input.
339	*/
340	AssertPtrReturn(pszPath, VERR_INVALID_POINTER);
341	AssertReturn(*pszPath, VERR_INVALID_PARAMETER);
342	AssertPtrNullReturn(pAccessTime, VERR_INVALID_POINTER);
343	AssertPtrNullReturn(pModificationTime, VERR_INVALID_POINTER);
344	AssertPtrNullReturn(pChangeTime, VERR_INVALID_POINTER);
345	AssertPtrNullReturn(pBirthTime, VERR_INVALID_POINTER);
346	AssertMsgReturn(RTPATH_F_IS_VALID(fFlags, 0), ("%#x\n", fFlags), VERR_INVALID_PARAMETER);
347
348	/*
349	* Convert the path.
350	*/
351	PRTUTF16 pwszPath;
352	int rc = RTStrToUtf16(pszPath, &pwszPath);
353	if (RT_SUCCESS(rc))
354	{
355	HANDLE hFile;
356	if (fFlags & RTPATH_F_FOLLOW_LINK)
357	hFile = CreateFileW(pwszPath,
358	FILE_WRITE_ATTRIBUTES, /* dwDesiredAccess */
359	FILE_SHARE_WRITE \| FILE_SHARE_READ \| FILE_SHARE_DELETE, /* dwShareMode */
360	NULL, /* security attribs */
361	OPEN_EXISTING, /* dwCreationDisposition */
362	FILE_FLAG_BACKUP_SEMANTICS \| FILE_ATTRIBUTE_NORMAL,
363	NULL);
364	else
365	{
366	/** @todo Symlink: Test RTPathSetTimesEx on Windows. (The code is disabled
367	* because it's not tested yet.) */
368	#if 0 //def FILE_FLAG_OPEN_REPARSE_POINT
369	hFile = CreateFileW(pwszPath,
370	FILE_WRITE_ATTRIBUTES, /* dwDesiredAccess */
371	FILE_SHARE_WRITE \| FILE_SHARE_READ \| FILE_SHARE_DELETE, /* dwShareMode */
372	NULL, /* security attribs */
373	OPEN_EXISTING, /* dwCreationDisposition */
374	FILE_FLAG_BACKUP_SEMANTICS \| FILE_ATTRIBUTE_NORMAL \| FILE_FLAG_OPEN_REPARSE_POINT,
375	NULL);
376
377	if (hFile == INVALID_HANDLE_VALUE && GetLastError() == ERROR_INVALID_PARAMETER)
378	#endif
379	hFile = CreateFileW(pwszPath,
380	FILE_WRITE_ATTRIBUTES, /* dwDesiredAccess */
381	FILE_SHARE_WRITE \| FILE_SHARE_READ \| FILE_SHARE_DELETE, /* dwShareMode */
382	NULL, /* security attribs */
383	OPEN_EXISTING, /* dwCreationDisposition */
384	FILE_FLAG_BACKUP_SEMANTICS \| FILE_ATTRIBUTE_NORMAL,
385	NULL);
386	}
387	if (hFile != INVALID_HANDLE_VALUE)
388	{
389	/*
390	* Check if it's a no-op.
391	*/
392	if (!pAccessTime && !pModificationTime && !pBirthTime)
393	rc = VINF_SUCCESS; /* NOP */
394	else
395	{
396	/*
397	* Convert the input and call the API.
398	*/
399	FILETIME CreationTimeFT;
400	PFILETIME pCreationTimeFT = NULL;
401	if (pBirthTime)
402	pCreationTimeFT = RTTimeSpecGetNtFileTime(pBirthTime, &CreationTimeFT);
403
404	FILETIME LastAccessTimeFT;
405	PFILETIME pLastAccessTimeFT = NULL;
406	if (pAccessTime)
407	pLastAccessTimeFT = RTTimeSpecGetNtFileTime(pAccessTime, &LastAccessTimeFT);
408
409	FILETIME LastWriteTimeFT;
410	PFILETIME pLastWriteTimeFT = NULL;
411	if (pModificationTime)
412	pLastWriteTimeFT = RTTimeSpecGetNtFileTime(pModificationTime, &LastWriteTimeFT);
413
414	if (SetFileTime(hFile, pCreationTimeFT, pLastAccessTimeFT, pLastWriteTimeFT))
415	rc = VINF_SUCCESS;
416	else
417	{
418	DWORD Err = GetLastError();
419	rc = RTErrConvertFromWin32(Err);
420	Log(("RTPathSetTimes('%s', %p, %p, %p, %p): SetFileTime failed with lasterr %d (%Rrc)\n",
421	pszPath, pAccessTime, pModificationTime, pChangeTime, pBirthTime, Err, rc));
422	}
423	}
424	BOOL fRc = CloseHandle(hFile); Assert(fRc); NOREF(fRc);
425	}
426	else
427	{
428	DWORD Err = GetLastError();
429	rc = RTErrConvertFromWin32(Err);
430	Log(("RTPathSetTimes('%s',,,,): failed with %Rrc and lasterr=%u\n", pszPath, rc, Err));
431	}
432
433	RTUtf16Free(pwszPath);
434	}
435
436	LogFlow(("RTPathSetTimes(%p:{%s}, %p:{%RDtimespec}, %p:{%RDtimespec}, %p:{%RDtimespec}, %p:{%RDtimespec}): return %Rrc\n",
437	pszPath, pszPath, pAccessTime, pAccessTime, pModificationTime, pModificationTime,
438	pChangeTime, pChangeTime, pBirthTime, pBirthTime));
439	return rc;
440	}
441
442
443
444
445	/**
446	* Internal worker for RTFileRename and RTFileMove.
447	*
448	* @returns iprt status code.
449	* @param pszSrc The source filename.
450	* @param pszDst The destination filename.
451	* @param fFlags The windows MoveFileEx flags.
452	* @param fFileType The filetype. We use the RTFMODE filetypes here. If it's 0,
453	* anything goes. If it's RTFS_TYPE_DIRECTORY we'll check that the
454	* source is a directory. If Its RTFS_TYPE_FILE we'll check that it's
455	* not a directory (we are NOT checking whether it's a file).
456	*/
457	int rtPathWin32MoveRename(const char pszSrc, const char pszDst, uint32_t fFlags, RTFMODE fFileType)
458	{
459	/*
460	* Convert the strings.
461	*/
462	PRTUTF16 pwszSrc;
463	int rc = RTStrToUtf16(pszSrc, &pwszSrc);
464	if (RT_SUCCESS(rc))
465	{
466	PRTUTF16 pwszDst;
467	rc = RTStrToUtf16(pszDst, &pwszDst);
468	if (RT_SUCCESS(rc))
469	{
470	/*
471	* Check object type if requested.
472	* This is open to race conditions.
473	*/
474	if (fFileType)
475	{
476	DWORD dwAttr = GetFileAttributesW(pwszSrc);
477	if (dwAttr == INVALID_FILE_ATTRIBUTES)
478	rc = RTErrConvertFromWin32(GetLastError());
479	else if (RTFS_IS_DIRECTORY(fFileType))
480	rc = dwAttr & FILE_ATTRIBUTE_DIRECTORY ? VINF_SUCCESS : VERR_NOT_A_DIRECTORY;
481	else
482	rc = dwAttr & FILE_ATTRIBUTE_DIRECTORY ? VERR_IS_A_DIRECTORY : VINF_SUCCESS;
483	}
484	if (RT_SUCCESS(rc))
485	{
486	if (MoveFileExW(pwszSrc, pwszDst, fFlags))
487	rc = VINF_SUCCESS;
488	else
489	{
490	DWORD Err = GetLastError();
491	rc = RTErrConvertFromWin32(Err);
492	Log(("MoveFileExW('%s', '%s', %#x, %RTfmode): fails with rc=%Rrc & lasterr=%d\n",
493	pszSrc, pszDst, fFlags, fFileType, rc, Err));
494	}
495	}
496	RTUtf16Free(pwszDst);
497	}
498	RTUtf16Free(pwszSrc);
499	}
500	return rc;
501	}
502
503
504	RTR3DECL(int) RTPathRename(const char pszSrc, const char pszDst, unsigned fRename)
505	{
506	/*
507	* Validate input.
508	*/
509	AssertMsgReturn(VALID_PTR(pszSrc), ("%p\n", pszSrc), VERR_INVALID_POINTER);
510	AssertMsgReturn(VALID_PTR(pszDst), ("%p\n", pszDst), VERR_INVALID_POINTER);
511	AssertMsgReturn(*pszSrc, ("%p\n", pszSrc), VERR_INVALID_PARAMETER);
512	AssertMsgReturn(*pszDst, ("%p\n", pszDst), VERR_INVALID_PARAMETER);
513	AssertMsgReturn(!(fRename & ~RTPATHRENAME_FLAGS_REPLACE), ("%#x\n", fRename), VERR_INVALID_PARAMETER);
514
515	/*
516	* Call the worker.
517	*/
518	int rc = rtPathWin32MoveRename(pszSrc, pszDst, fRename & RTPATHRENAME_FLAGS_REPLACE ? MOVEFILE_REPLACE_EXISTING : 0, 0);
519
520	LogFlow(("RTPathRename(%p:{%s}, %p:{%s}, %#x): returns %Rrc\n", pszSrc, pszSrc, pszDst, pszDst, fRename, rc));
521	return rc;
522	}
523
524
525	RTDECL(bool) RTPathExists(const char *pszPath)
526	{
527	return RTPathExistsEx(pszPath, RTPATH_F_FOLLOW_LINK);
528	}
529
530
531	RTDECL(bool) RTPathExistsEx(const char *pszPath, uint32_t fFlags)
532	{
533	/*
534	* Validate input.
535	*/
536	AssertPtrReturn(pszPath, false);
537	AssertReturn(*pszPath, false);
538	Assert(RTPATH_F_IS_VALID(fFlags, 0));
539
540	/*
541	* Try query file info.
542	*/
543	DWORD dwAttr;
544	#ifndef RT_DONT_CONVERT_FILENAMES
545	PRTUTF16 pwszPath;
546	int rc = RTStrToUtf16(pszPath, &pwszPath);
547	if (RT_SUCCESS(rc))
548	{
549	dwAttr = GetFileAttributesW(pwszPath);
550	RTUtf16Free(pwszPath);
551	}
552	else
553	dwAttr = INVALID_FILE_ATTRIBUTES;
554	#else
555	dwAttr = GetFileAttributesA(pszPath);
556	#endif
557
558	if (dwAttr == INVALID_FILE_ATTRIBUTES)
559	return false;
560
561	#ifdef FILE_ATTRIBUTE_REPARSE_POINT
562	if ( (fFlags & RTPATH_F_FOLLOW_LINK)
563	&& (dwAttr & FILE_ATTRIBUTE_REPARSE_POINT))
564	{
565	AssertFailed();
566	/** @todo Symlinks: RTPathExists+RTPathExistsEx is misbehaving on symbolic
567	* links on Windows. */
568	}
569	#endif
570
571	return true;
572	}
573
574
575	RTDECL(int) RTPathGetCurrent(char *pszPath, size_t cchPath)
576	{
577	int rc;
578
579	/*
580	* GetCurrentDirectory may in some cases omit the drive letter, according
581	* to MSDN, thus the GetFullPathName call.
582	*/
583	#ifndef RT_DONT_CONVERT_FILENAMES
584	RTUTF16 wszCurPath[RTPATH_MAX];
585	if (GetCurrentDirectoryW(RTPATH_MAX, wszCurPath))
586	{
587	RTUTF16 wszFullPath[RTPATH_MAX];
588	if (GetFullPathNameW(wszCurPath, RTPATH_MAX, wszFullPath, NULL))
589	rc = RTUtf16ToUtf8Ex(&wszFullPath[0], RTSTR_MAX, &pszPath, cchPath, NULL);
590	else
591	rc = RTErrConvertFromWin32(GetLastError());
592	}
593	else
594	rc = RTErrConvertFromWin32(GetLastError());
595	#else
596	char szCurPath[RTPATH_MAX];
597	if (GetCurrentDirectory(RTPATH_MAX, szCurPath))
598	{
599	if (GetFullPathName(szCurPath, cchPath, pszPath, NULL))
600	rc = VINF_SUCCESS;
601	else
602	rc = RTErrConvertFromWin32(GetLastError());
603	}
604	else
605	rc = RTErrConvertFromWin32(GetLastError());
606	#endif
607	return rc;
608	}
609
610
611	RTDECL(int) RTPathSetCurrent(const char *pszPath)
612	{
613	/*
614	* Validate input.
615	*/
616	AssertPtrReturn(pszPath, VERR_INVALID_POINTER);
617	AssertReturn(*pszPath, VERR_INVALID_PARAMETER);
618
619	/*
620	* This interface is almost identical to the Windows API.
621	*/
622	#ifndef RT_DONT_CONVERT_FILENAMES
623	PRTUTF16 pwszPath;
624	int rc = RTStrToUtf16(pszPath, &pwszPath);
625	if (RT_SUCCESS(rc))
626	{
627	/** @todo improove the slash stripping a bit? */
628	size_t cwc = RTUtf16Len(pwszPath);
629	if ( cwc >= 2
630	&& ( pwszPath[cwc - 1] == L'/'
631	\|\| pwszPath[cwc - 1] == L'\\')
632	&& pwszPath[cwc - 2] != ':')
633	pwszPath[cwc - 1] = L'\0';
634
635	if (!SetCurrentDirectoryW(pwszPath))
636	rc = RTErrConvertFromWin32(GetLastError());
637
638	RTUtf16Free(pwszPath);
639	}
640	#else
641	int rc = VINF_SUCCESS;
642	/** @todo improove the slash stripping a bit? */
643	char const *pszEnd = strchr(pszPath, '\0');
644	size_t const cchPath = pszPath - pszEnd;
645	if ( cchPath >= 2
646	&& ( pszEnd[-1] == '/'
647	\|\| pszEnd[-1] == '\\')
648	&& pszEnd[-2] == ':')
649	{
650	char pszCopy = (char )RTMemTmpAlloc(cchPath);
651	if (pszCopy)
652	{
653	memcpy(pszCopy, pszPath, cchPath - 1);
654	pszCopy[cchPath - 1] = '\0';
655	if (!SetCurrentDirectory(pszCopy))
656	rc = RTErrConvertFromWin32(GetLastError());
657	RTMemTmpFree(pszCopy);
658	}
659	else
660	rc = VERR_NO_MEMORY;
661	}
662	else
663	{
664	if (!SetCurrentDirectory(pszPath))
665	rc = RTErrConvertFromWin32(GetLastError());
666	}
667	#endif
668	return rc;
669	}
670

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source: vbox/trunk/src/VBox/Runtime/r3/win/path-win.cpp@ 25240

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