direnum-win.cpp@ 96407

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1	/* $Id: direnum-win.cpp 96407 2022-08-22 17:43:14Z vboxsync $ */
2	/** @file
3	* IPRT - Directory Enumeration, Windows.
4	*/
5
6	/*
7	* Copyright (C) 2006-2022 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* The contents of this file may alternatively be used under the terms
26	* of the Common Development and Distribution License Version 1.0
27	* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
28	* in the VirtualBox distribution, in which case the provisions of the
29	* CDDL are applicable instead of those of the GPL.
30	*
31	* You may elect to license modified versions of this file under the
32	* terms and conditions of either the GPL or the CDDL or both.
33	*
34	* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
35	*/
36
37
38	/*********************************************************************************************************************************
39	* Header Files *
40	*********************************************************************************************************************************/
41	#define LOG_GROUP RTLOGGROUP_DIR
42	#include <iprt/win/windows.h>
43
44	#include <iprt/dir.h>
45	#include <iprt/path.h>
46	#include <iprt/mem.h>
47	#include <iprt/string.h>
48	#include <iprt/assert.h>
49	#include <iprt/err.h>
50	#include <iprt/file.h>
51	#include <iprt/log.h>
52	#include "internal/fs.h"
53	#include "internal/dir.h"
54
55
56	size_t rtDirNativeGetStructSize(const char *pszPath)
57	{
58	NOREF(pszPath);
59	return sizeof(RTDIRINTERNAL);
60	}
61
62
63	int rtDirNativeOpen(PRTDIRINTERNAL pDir, uintptr_t hRelativeDir, void *pvNativeRelative))
64	{
65	RT_NOREF(hRelativeDir, pvNativeRelative);
66
67	/*
68	* Setup the search expression.
69	*
70	* pszPathBuf is pointing to the return 4K return buffer for the RTPathReal()
71	* call in rtDirOpenCommon(), so all we gota do is check that we don't overflow
72	* it when adding the wildcard expression.
73	*/
74	/** @todo the pszPathBuf argument was removed in order to support paths longer than RTPATH_MAX. Rewrite this code. */
75	size_t cbExpr;
76	const char *pszExpr;
77	if (pDir->enmFilter == RTDIRFILTER_WINNT)
78	{
79	pszExpr = pDir->pszFilter;
80	cbExpr = pDir->cchFilter + 1;
81	}
82	else
83	{
84	pszExpr = "*";
85	cbExpr = sizeof("*");
86	}
87	if (pDir->cchPath + cbExpr > RTPATH_MAX)
88	return VERR_FILENAME_TOO_LONG;
89	memcpy(pszPathBuf + pDir->cchPath, pszExpr, cbExpr);
90
91
92	/*
93	* Attempt opening the search.
94	*/
95	PRTUTF16 pwszName;
96	int rc = RTPathWinFromUtf8(pwszPathBuf, &pwszName, 0 /fFlags/);
97	if (RT_SUCCESS(rc))
98	{
99	pDir->hDir = FindFirstFileW((LPCWSTR)pwszName, &pDir->Data);
100	if (pDir->hDir != INVALID_HANDLE_VALUE)
101	pDir->fDataUnread = true;
102	else
103	{
104	DWORD dwErr = GetLastError();
105	/* Theoretical case of an empty directory or more normal case of no matches. */
106	if ( dwErr == ERROR_FILE_NOT_FOUND
107	\|\| dwErr == ERROR_NO_MORE_FILES /* ???*/)
108	pDir->fDataUnread = false;
109	else
110	rc = RTErrConvertFromWin32(GetLastError());
111	}
112	RTPathWinFree(pwszName);
113	}
114
115	return rc;
116	}
117
118
119	RTDECL(int) RTDirClose(PRTDIRINTERNAL pDir)
120	{
121	/*
122	* Validate input.
123	*/
124	if (!pDir)
125	return VERR_INVALID_PARAMETER;
126	if (pDir->u32Magic != RTDIR_MAGIC)
127	{
128	AssertMsgFailed(("Invalid pDir=%p\n", pDir));
129	return VERR_INVALID_PARAMETER;
130	}
131
132	/*
133	* Close the handle.
134	*/
135	pDir->u32Magic++;
136	if (pDir->hDir != INVALID_HANDLE_VALUE)
137	{
138	BOOL fRc = FindClose(pDir->hDir);
139	Assert(fRc);
140	pDir->hDir = INVALID_HANDLE_VALUE;
141	}
142	RTStrFree(pDir->pszName);
143	pDir->pszName = NULL;
144	RTMemFree(pDir);
145
146	return VINF_SUCCESS;
147	}
148
149
150	RTDECL(int) RTDirRead(RTDIR hDir, PRTDIRENTRY pDirEntry, size_t *pcbDirEntry)
151	{
152	PPRTDIRINTERNAL pDir = hDir;
153
154	/*
155	* Validate input.
156	*/
157	if (!pDir \|\| pDir->u32Magic != RTDIR_MAGIC)
158	{
159	AssertMsgFailed(("Invalid pDir=%p\n", pDir));
160	return VERR_INVALID_PARAMETER;
161	}
162	if (!pDirEntry)
163	{
164	AssertMsgFailed(("Invalid pDirEntry=%p\n", pDirEntry));
165	return VERR_INVALID_PARAMETER;
166	}
167	size_t cbDirEntry = sizeof(*pDirEntry);
168	if (pcbDirEntry)
169	{
170	cbDirEntry = *pcbDirEntry;
171	if (cbDirEntry < RT_UOFFSETOF(RTDIRENTRY, szName[2]))
172	{
173	AssertMsgFailed(("Invalid pcbDirEntry=%zu (min %zu)\n", pcbDirEntry, RT_UOFFSETOF(RTDIRENTRY, szName[2])));
174	return VERR_INVALID_PARAMETER;
175	}
176	}
177
178	/*
179	* Fetch data?
180	*/
181	if (!pDir->fDataUnread)
182	{
183	RTStrFree(pDir->pszName);
184	pDir->pszName = NULL;
185
186	BOOL fRc = FindNextFileW(pDir->hDir, &pDir->Data);
187	if (!fRc)
188	{
189	int iErr = GetLastError();
190	if (pDir->hDir == INVALID_HANDLE_VALUE \|\| iErr == ERROR_NO_MORE_FILES)
191	return VERR_NO_MORE_FILES;
192	return RTErrConvertFromWin32(iErr);
193	}
194	}
195
196	/*
197	* Convert the filename to UTF-8.
198	*/
199	if (!pDir->pszName)
200	{
201	int rc = RTUtf16ToUtf8((PCRTUTF16)pDir->Data.cFileName, &pDir->pszName);
202	if (RT_FAILURE(rc))
203	{
204	pDir->pszName = NULL;
205	return rc;
206	}
207	pDir->cchName = strlen(pDir->pszName);
208	}
209
210	/*
211	* Check if we've got enough space to return the data.
212	*/
213	const char *pszName = pDir->pszName;
214	const size_t cchName = pDir->cchName;
215	const size_t cbRequired = RT_UOFFSETOF(RTDIRENTRY, szName[1]) + cchName;
216	if (pcbDirEntry)
217	*pcbDirEntry = cbRequired;
218	if (cbRequired > cbDirEntry)
219	return VERR_BUFFER_OVERFLOW;
220
221	/*
222	* Setup the returned data.
223	*/
224	pDir->fDataUnread = false;
225	pDirEntry->INodeId = 0; /** @todo we can use the fileid here if we must (see GetFileInformationByHandle). */
226	pDirEntry->enmType = pDir->Data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY
227	? RTDIRENTRYTYPE_DIRECTORY : RTDIRENTRYTYPE_FILE;
228	pDirEntry->cbName = (uint16_t)cchName;
229	Assert(pDirEntry->cbName == cchName);
230	memcpy(pDirEntry->szName, pszName, cchName + 1);
231
232	return VINF_SUCCESS;
233	}
234
235
236	RTDECL(int) RTDirReadEx(RTDIR hDir, PRTDIRENTRYEX pDirEntry, size_t *pcbDirEntry, RTFSOBJATTRADD enmAdditionalAttribs, uint32_t fFlags)
237	{
238	PPRTDIRINTERNAL pDir = hDir;
239	/** @todo Symlinks: Find[First\|Next]FileW will return info about
240	the link, so RTPATH_F_FOLLOW_LINK is not handled correctly. */
241	/*
242	* Validate input.
243	*/
244	if (!pDir \|\| pDir->u32Magic != RTDIR_MAGIC)
245	{
246	AssertMsgFailed(("Invalid pDir=%p\n", pDir));
247	return VERR_INVALID_PARAMETER;
248	}
249	if (!pDirEntry)
250	{
251	AssertMsgFailed(("Invalid pDirEntry=%p\n", pDirEntry));
252	return VERR_INVALID_PARAMETER;
253	}
254	if ( enmAdditionalAttribs < RTFSOBJATTRADD_NOTHING
255	\|\| enmAdditionalAttribs > RTFSOBJATTRADD_LAST)
256	{
257	AssertMsgFailed(("Invalid enmAdditionalAttribs=%p\n", enmAdditionalAttribs));
258	return VERR_INVALID_PARAMETER;
259	}
260	AssertMsgReturn(RTPATH_F_IS_VALID(fFlags, 0), ("%#x\n", fFlags), VERR_INVALID_PARAMETER);
261	size_t cbDirEntry = sizeof(*pDirEntry);
262	if (pcbDirEntry)
263	{
264	cbDirEntry = *pcbDirEntry;
265	if (cbDirEntry < RT_UOFFSETOF(RTDIRENTRYEX, szName[2]))
266	{
267	AssertMsgFailed(("Invalid pcbDirEntry=%zu (min %zu)\n", pcbDirEntry, RT_UOFFSETOF(RTDIRENTRYEX, szName[2])));
268	return VERR_INVALID_PARAMETER;
269	}
270	}
271
272	/*
273	* Fetch data?
274	*/
275	if (!pDir->fDataUnread)
276	{
277	RTStrFree(pDir->pszName);
278	pDir->pszName = NULL;
279
280	BOOL fRc = FindNextFileW(pDir->hDir, &pDir->Data);
281	if (!fRc)
282	{
283	int iErr = GetLastError();
284	if (pDir->hDir == INVALID_HANDLE_VALUE \|\| iErr == ERROR_NO_MORE_FILES)
285	return VERR_NO_MORE_FILES;
286	return RTErrConvertFromWin32(iErr);
287	}
288	}
289
290	/*
291	* Convert the filename to UTF-8.
292	*/
293	if (!pDir->pszName)
294	{
295	int rc = RTUtf16ToUtf8((PCRTUTF16)pDir->Data.cFileName, &pDir->pszName);
296	if (RT_FAILURE(rc))
297	{
298	pDir->pszName = NULL;
299	return rc;
300	}
301	pDir->cchName = strlen(pDir->pszName);
302	}
303
304	/*
305	* Check if we've got enough space to return the data.
306	*/
307	const char *pszName = pDir->pszName;
308	const size_t cchName = pDir->cchName;
309	const size_t cbRequired = RT_UOFFSETOF(RTDIRENTRYEX, szName[1]) + cchName;
310	if (pcbDirEntry)
311	*pcbDirEntry = cbRequired;
312	if (cbRequired > cbDirEntry)
313	return VERR_BUFFER_OVERFLOW;
314
315	/*
316	* Setup the returned data.
317	*/
318	pDir->fDataUnread = false;
319	pDirEntry->cbName = (uint16_t)cchName;
320	Assert(pDirEntry->cbName == cchName);
321	memcpy(pDirEntry->szName, pszName, cchName + 1);
322	if (pDir->Data.cAlternateFileName[0])
323	{
324	/* copy and calc length */
325	PCRTUTF16 pwszSrc = (PCRTUTF16)pDir->Data.cAlternateFileName;
326	PRTUTF16 pwszDst = pDirEntry->wszShortName;
327	uint32_t off = 0;
328	while (off < RT_ELEMENTS(pDirEntry->wszShortName) - 1U && pwszSrc[off])
329	{
330	pwszDst[off] = pwszSrc[off];
331	off++;
332	}
333	pDirEntry->cwcShortName = (uint16_t)off;
334
335	/* zero the rest */
336	do
337	pwszDst[off++] = '\0';
338	while (off < RT_ELEMENTS(pDirEntry->wszShortName));
339	}
340	else
341	{
342	memset(pDirEntry->wszShortName, 0, sizeof(pDirEntry->wszShortName));
343	pDirEntry->cwcShortName = 0;
344	}
345
346	pDirEntry->Info.cbObject = ((uint64_t)pDir->Data.nFileSizeHigh << 32)
347	\| (uint64_t)pDir->Data.nFileSizeLow;
348	pDirEntry->Info.cbAllocated = pDirEntry->Info.cbObject;
349
350	Assert(sizeof(uint64_t) == sizeof(pDir->Data.ftCreationTime));
351	RTTimeSpecSetNtTime(&pDirEntry->Info.BirthTime, (uint64_t )&pDir->Data.ftCreationTime);
352	RTTimeSpecSetNtTime(&pDirEntry->Info.AccessTime, (uint64_t )&pDir->Data.ftLastAccessTime);
353	RTTimeSpecSetNtTime(&pDirEntry->Info.ModificationTime, (uint64_t )&pDir->Data.ftLastWriteTime);
354	pDirEntry->Info.ChangeTime = pDirEntry->Info.ModificationTime;
355
356	pDirEntry->Info.Attr.fMode = rtFsModeFromDos((pDir->Data.dwFileAttributes << RTFS_DOS_SHIFT) & RTFS_DOS_MASK_NT,
357	pszName, cchName, pDir->Data.dwReserved0, 0);
358
359	/*
360	* Requested attributes (we cannot provide anything actually).
361	*/
362	switch (enmAdditionalAttribs)
363	{
364	case RTFSOBJATTRADD_EASIZE:
365	pDirEntry->Info.Attr.enmAdditional = RTFSOBJATTRADD_EASIZE;
366	pDirEntry->Info.Attr.u.EASize.cb = 0;
367	break;
368
369	case RTFSOBJATTRADD_UNIX:
370	pDirEntry->Info.Attr.enmAdditional = RTFSOBJATTRADD_UNIX;
371	pDirEntry->Info.Attr.u.Unix.uid = ~0U;
372	pDirEntry->Info.Attr.u.Unix.gid = ~0U;
373	pDirEntry->Info.Attr.u.Unix.cHardlinks = 1;
374	pDirEntry->Info.Attr.u.Unix.INodeIdDevice = 0; /** @todo Use the volume serial number (see GetFileInformationByHandle). */
375	pDirEntry->Info.Attr.u.Unix.INodeId = 0; /** @todo Use the fileid (see GetFileInformationByHandle). */
376	pDirEntry->Info.Attr.u.Unix.fFlags = 0;
377	pDirEntry->Info.Attr.u.Unix.GenerationId = 0;
378	pDirEntry->Info.Attr.u.Unix.Device = 0;
379	break;
380
381	case RTFSOBJATTRADD_NOTHING:
382	pDirEntry->Info.Attr.enmAdditional = RTFSOBJATTRADD_NOTHING;
383	break;
384
385	case RTFSOBJATTRADD_UNIX_OWNER:
386	pDirEntry->Info.Attr.enmAdditional = RTFSOBJATTRADD_UNIX_OWNER;
387	pDirEntry->Info.Attr.u.UnixOwner.uid = ~0U;
388	pDirEntry->Info.Attr.u.UnixOwner.szName[0] = '\0'; /** @todo return something sensible here. */
389	break;
390
391	case RTFSOBJATTRADD_UNIX_GROUP:
392	pDirEntry->Info.Attr.enmAdditional = RTFSOBJATTRADD_UNIX_GROUP;
393	pDirEntry->Info.Attr.u.UnixGroup.gid = ~0U;
394	pDirEntry->Info.Attr.u.UnixGroup.szName[0] = '\0';
395	break;
396
397	default:
398	AssertMsgFailed(("Impossible!\n"));
399	return VERR_INTERNAL_ERROR;
400	}
401
402	return VINF_SUCCESS;
403	}
404

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source: vbox/trunk/src/VBox/Runtime/r3/win/direnum-win.cpp@ 96407

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