dir-posix.cpp@ 25776

Last change on this file since 25776 was 25292, checked in by vboxsync, 15 years ago
RTDirReadEx parameter to resolve symlinks.
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1	/* $Id: dir-posix.cpp 25292 2009-12-10 10:29:57Z vboxsync $ */
2	/** @file
3	* IPRT - Directory manipulation, POSIX.
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_DIR
36	#include <errno.h>
37	#include <unistd.h>
38	#include <sys/types.h>
39	#include <sys/stat.h>
40	#include <dirent.h>
41	#include <stdio.h>
42
43	#include <iprt/dir.h>
44	#include <iprt/path.h>
45	#include <iprt/alloc.h>
46	#include <iprt/alloca.h>
47	#include <iprt/string.h>
48	#include <iprt/assert.h>
49	#include <iprt/err.h>
50	#include <iprt/log.h>
51	#include "internal/dir.h"
52	#include "internal/fs.h"
53	#include "internal/path.h"
54
55	#if !defined(RT_OS_SOLARIS)
56	# define HAVE_DIRENT_D_TYPE 1
57	#endif
58
59
60	RTDECL(bool) RTDirExists(const char *pszPath)
61	{
62	bool fRc = false;
63	char *pszNativePath;
64	int rc = rtPathToNative(&pszNativePath, pszPath);
65	if (RT_SUCCESS(rc))
66	{
67	struct stat s;
68	fRc = !stat(pszNativePath, &s)
69	&& S_ISDIR(s.st_mode);
70
71	rtPathFreeNative(pszNativePath);
72	}
73
74	LogFlow(("RTDirExists(%p={%s}): returns %RTbool\n", pszPath, pszPath, fRc));
75	return fRc;
76	}
77
78
79	RTDECL(int) RTDirCreate(const char *pszPath, RTFMODE fMode)
80	{
81	int rc;
82	fMode = rtFsModeNormalize(fMode, pszPath, 0);
83	if (rtFsModeIsValidPermissions(fMode))
84	{
85	char *pszNativePath;
86	rc = rtPathToNative(&pszNativePath, pszPath);
87	if (RT_SUCCESS(rc))
88	{
89	if (mkdir(pszNativePath, fMode & RTFS_UNIX_MASK))
90	{
91	rc = errno;
92	#ifdef RT_OS_SOLARIS
93	/*
94	* mkdir on nfs mount points has been/is busted in various
95	* during the Nevada development cycle. We've observed:
96	* - Build 111b (2009.06) returns EACCES.
97	* - Build ca. 70-80 returns ENOSYS.
98	*/
99	if ( rc == ENOSYS
100	\|\| rc == EACCES)
101	{
102	struct stat st;
103	if (!stat(pszNativePath, &st))
104	rc = EEXIST;
105	}
106	#endif
107	rc = RTErrConvertFromErrno(rc);
108	}
109	}
110
111	rtPathFreeNative(pszNativePath);
112	}
113	else
114	{
115	AssertMsgFailed(("Invalid file mode! %RTfmode\n", fMode));
116	rc = VERR_INVALID_FMODE;
117	}
118	LogFlow(("RTDirCreate(%p={%s}, %RTfmode): returns %Rrc\n", pszPath, pszPath, fMode, rc));
119	return rc;
120	}
121
122
123	RTDECL(int) RTDirRemove(const char *pszPath)
124	{
125	char *pszNativePath;
126	int rc = rtPathToNative(&pszNativePath, pszPath);
127	if (RT_SUCCESS(rc))
128	{
129	if (rmdir(pszNativePath))
130	rc = RTErrConvertFromErrno(errno);
131
132	rtPathFreeNative(pszNativePath);
133	}
134
135	LogFlow(("RTDirRemove(%p={%s}): returns %Rrc\n", pszPath, pszPath, rc));
136	return rc;
137	}
138
139
140	int rtOpenDirNative(PRTDIR pDir, char *pszPathBuf)
141	{
142	/*
143	* Convert to a native path and try opendir.
144	*/
145	char *pszNativePath;
146	int rc = rtPathToNative(&pszNativePath, pDir->pszPath);
147	if (RT_SUCCESS(rc))
148	{
149	pDir->pDir = opendir(pszNativePath);
150	if (pDir->pDir)
151	{
152	/*
153	* Init data.
154	*/
155	pDir->fDataUnread = false;
156	memset(&pDir->Data, 0, RT_OFFSETOF(RTDIR, Data.d_name)); /* not strictly necessary */
157	memset(&pDir->Data.d_name[0], 0, pDir->cbMaxName);
158	}
159	else
160	rc = RTErrConvertFromErrno(errno);
161
162	rtPathFreeNative(pszNativePath);
163	}
164
165	return rc;
166	}
167
168
169	RTDECL(int) RTDirClose(PRTDIR pDir)
170	{
171	/*
172	* Validate input.
173	*/
174	if (!pDir)
175	return VERR_INVALID_PARAMETER;
176	if (pDir->u32Magic != RTDIR_MAGIC)
177	{
178	AssertMsgFailed(("Invalid pDir=%p\n", pDir));
179	return VERR_INVALID_PARAMETER;
180	}
181
182	/*
183	* Close the handle.
184	*/
185	int rc = VINF_SUCCESS;
186	pDir->u32Magic = RTDIR_MAGIC_DEAD;
187	if (closedir(pDir->pDir))
188	{
189	rc = RTErrConvertFromErrno(errno);
190	AssertMsgFailed(("closedir(%p) -> errno=%d (%Rrc)\n", pDir->pDir, errno, rc));
191	}
192
193	RTMemFree(pDir);
194	return rc;
195	}
196
197
198	/**
199	* Ensure that there is unread data in the buffer
200	* and that there is a converted filename hanging around.
201	*
202	* @returns IPRT status code.
203	* @param pDir the open directory. Fully validated.
204	*/
205	static int rtDirReadMore(PRTDIR pDir)
206	{
207	/** @todo try avoid the rematching on buffer overflow errors. */
208	for (;;)
209	{
210	/*
211	* Fetch data?
212	*/
213	if (!pDir->fDataUnread)
214	{
215	struct dirent *pResult = NULL;
216	int rc = readdir_r(pDir->pDir, &pDir->Data, &pResult);
217	if (rc)
218	{
219	rc = RTErrConvertFromErrno(rc);
220	AssertRC(rc);
221	return rc;
222	}
223	if (!pResult)
224	return VERR_NO_MORE_FILES;
225	}
226
227	#ifndef RT_DONT_CONVERT_FILENAMES
228	/*
229	* Convert the filename to UTF-8.
230	*/
231	if (!pDir->pszName)
232	{
233	int rc = rtPathFromNativeEx(&pDir->pszName, pDir->Data.d_name, pDir->pszPath);
234	if (RT_FAILURE(rc))
235	{
236	pDir->pszName = NULL;
237	return rc;
238	}
239	pDir->cchName = strlen(pDir->pszName);
240	}
241	if ( !pDir->pfnFilter
242	\|\| pDir->pfnFilter(pDir, pDir->pszName))
243	break;
244	RTStrFree(pDir->pszName);
245	pDir->pszName = NULL;
246	#else
247	if ( !pDir->pfnFilter
248	\|\| pDir->pfnFilter(pDir, pDir->Data.d_name))
249	break;
250	#endif
251	pDir->fDataUnread = false;
252	}
253
254	pDir->fDataUnread = true;
255	return VINF_SUCCESS;
256	}
257
258
259	#ifdef HAVE_DIRENT_D_TYPE
260	/**
261	* Converts the d_type field to IPRT directory entry type.
262	*
263	* @returns IPRT directory entry type.
264	* @param Unix
265	*/
266	static RTDIRENTRYTYPE rtDirType(int iType)
267	{
268	switch (iType)
269	{
270	case DT_UNKNOWN: return RTDIRENTRYTYPE_UNKNOWN;
271	case DT_FIFO: return RTDIRENTRYTYPE_FIFO;
272	case DT_CHR: return RTDIRENTRYTYPE_DEV_CHAR;
273	case DT_DIR: return RTDIRENTRYTYPE_DIRECTORY;
274	case DT_BLK: return RTDIRENTRYTYPE_DEV_BLOCK;
275	case DT_REG: return RTDIRENTRYTYPE_FILE;
276	case DT_LNK: return RTDIRENTRYTYPE_SYMLINK;
277	case DT_SOCK: return RTDIRENTRYTYPE_SOCKET;
278	case DT_WHT: return RTDIRENTRYTYPE_WHITEOUT;
279	default:
280	AssertMsgFailed(("iType=%d\n", iType));
281	return RTDIRENTRYTYPE_UNKNOWN;
282	}
283	}
284	#endif /HAVE_DIRENT_D_TYPE /
285
286
287	RTDECL(int) RTDirRead(PRTDIR pDir, PRTDIRENTRY pDirEntry, size_t *pcbDirEntry)
288	{
289	/*
290	* Validate and digest input.
291	*/
292	if (!rtDirValidHandle(pDir))
293	return VERR_INVALID_PARAMETER;
294	AssertMsgReturn(VALID_PTR(pDirEntry), ("%p\n", pDirEntry), VERR_INVALID_POINTER);
295
296	size_t cbDirEntry = sizeof(*pDirEntry);
297	if (pcbDirEntry)
298	{
299	AssertMsgReturn(VALID_PTR(pcbDirEntry), ("%p\n", pcbDirEntry), VERR_INVALID_POINTER);
300	cbDirEntry = *pcbDirEntry;
301	AssertMsgReturn(cbDirEntry >= RT_UOFFSETOF(RTDIRENTRY, szName[2]),
302	("Invalid pcbDirEntry=%d (min %d)\n", pcbDirEntry, RT_OFFSETOF(RTDIRENTRYEX, szName[2])),
303	VERR_INVALID_PARAMETER);
304	}
305
306	/*
307	* Fetch more data if necessary and/or convert the name.
308	*/
309	int rc = rtDirReadMore(pDir);
310	if (RT_SUCCESS(rc))
311	{
312	/*
313	* Check if we've got enough space to return the data.
314	*/
315	#ifdef RT_DONT_CONVERT_FILENAMES
316	const char *pszName = pDir->Data.d_name;
317	const size_t cchName = strlen(pszName);
318	#else
319	const char *pszName = pDir->pszName;
320	const size_t cchName = pDir->cchName;
321	#endif
322	const size_t cbRequired = RT_OFFSETOF(RTDIRENTRY, szName[1]) + cchName;
323	if (pcbDirEntry)
324	*pcbDirEntry = cbRequired;
325	if (cbRequired <= cbDirEntry)
326	{
327	/*
328	* Setup the returned data.
329	*/
330	pDirEntry->INodeId = pDir->Data.d_ino; /* may need #ifdefing later */
331	#ifdef HAVE_DIRENT_D_TYPE
332	pDirEntry->enmType = rtDirType(pDir->Data.d_type);
333	#else
334	pDirEntry->enmType = RTDIRENTRYTYPE_UNKNOWN;
335	#endif
336	pDirEntry->cbName = (uint16_t)cchName;
337	Assert(pDirEntry->cbName == cchName);
338	memcpy(pDirEntry->szName, pszName, cchName + 1);
339
340	/* free cached data */
341	pDir->fDataUnread = false;
342	#ifndef RT_DONT_CONVERT_FILENAMES
343	RTStrFree(pDir->pszName);
344	pDir->pszName = NULL;
345	#endif
346	}
347	else
348	rc = VERR_BUFFER_OVERFLOW;
349	}
350
351	LogFlow(("RTDirRead(%p:{%s}, %p:{%s}, %p:{%u}): returns %Rrc\n",
352	pDir, pDir->pszPath, pDirEntry, RT_SUCCESS(rc) ? pDirEntry->szName : "<failed>",
353	pcbDirEntry, pcbDirEntry ? *pcbDirEntry : 0, rc));
354	return rc;
355	}
356
357
358	/**
359	* Fills dummy info into the info structure.
360	* This function is called if we cannot stat the file.
361	*
362	* @param pInfo The struct in question.
363	* @param
364	*/
365	static void rtDirSetDummyInfo(PRTFSOBJINFO pInfo, RTDIRENTRYTYPE enmType)
366	{
367	pInfo->cbObject = 0;
368	pInfo->cbAllocated = 0;
369	RTTimeSpecSetNano(&pInfo->AccessTime, 0);
370	RTTimeSpecSetNano(&pInfo->ModificationTime, 0);
371	RTTimeSpecSetNano(&pInfo->ChangeTime, 0);
372	RTTimeSpecSetNano(&pInfo->BirthTime, 0);
373	memset(&pInfo->Attr, 0, sizeof(pInfo->Attr));
374	pInfo->Attr.enmAdditional = RTFSOBJATTRADD_NOTHING;
375	switch (enmType)
376	{
377	default:
378	case RTDIRENTRYTYPE_UNKNOWN: pInfo->Attr.fMode = RTFS_DOS_NT_NORMAL;
379	case RTDIRENTRYTYPE_FIFO: pInfo->Attr.fMode = RTFS_DOS_NT_NORMAL \| RTFS_TYPE_FIFO;
380	case RTDIRENTRYTYPE_DEV_CHAR: pInfo->Attr.fMode = RTFS_DOS_NT_NORMAL \| RTFS_TYPE_DEV_CHAR;
381	case RTDIRENTRYTYPE_DIRECTORY: pInfo->Attr.fMode = RTFS_DOS_DIRECTORY \| RTFS_TYPE_DIRECTORY;
382	case RTDIRENTRYTYPE_DEV_BLOCK: pInfo->Attr.fMode = RTFS_DOS_NT_NORMAL \| RTFS_TYPE_DEV_BLOCK;
383	case RTDIRENTRYTYPE_FILE: pInfo->Attr.fMode = RTFS_DOS_NT_NORMAL \| RTFS_TYPE_FILE;
384	case RTDIRENTRYTYPE_SYMLINK: pInfo->Attr.fMode = RTFS_DOS_NT_NORMAL \| RTFS_TYPE_SYMLINK;
385	case RTDIRENTRYTYPE_SOCKET: pInfo->Attr.fMode = RTFS_DOS_NT_NORMAL \| RTFS_TYPE_SOCKET;
386	case RTDIRENTRYTYPE_WHITEOUT: pInfo->Attr.fMode = RTFS_DOS_NT_NORMAL \| RTFS_TYPE_WHITEOUT;
387	}
388	}
389
390
391	RTDECL(int) RTDirReadEx(PRTDIR pDir, PRTDIRENTRYEX pDirEntry, size_t *pcbDirEntry, RTFSOBJATTRADD enmAdditionalAttribs, uint32_t fFlags)
392	{
393	/*
394	* Validate and digest input.
395	*/
396	if (!rtDirValidHandle(pDir))
397	return VERR_INVALID_PARAMETER;
398	AssertMsgReturn(VALID_PTR(pDirEntry), ("%p\n", pDirEntry), VERR_INVALID_POINTER);
399	AssertMsgReturn( enmAdditionalAttribs >= RTFSOBJATTRADD_NOTHING
400	&& enmAdditionalAttribs <= RTFSOBJATTRADD_LAST,
401	("Invalid enmAdditionalAttribs=%p\n", enmAdditionalAttribs),
402	VERR_INVALID_PARAMETER);
403	AssertMsgReturn(RTPATH_F_IS_VALID(fFlags, 0), ("%#x\n", fFlags), VERR_INVALID_PARAMETER);
404	size_t cbDirEntry = sizeof(*pDirEntry);
405	if (pcbDirEntry)
406	{
407	AssertMsgReturn(VALID_PTR(pcbDirEntry), ("%p\n", pcbDirEntry), VERR_INVALID_POINTER);
408	cbDirEntry = *pcbDirEntry;
409	AssertMsgReturn(cbDirEntry >= (unsigned)RT_OFFSETOF(RTDIRENTRYEX, szName[2]),
410	("Invalid pcbDirEntry=%d (min %d)\n", pcbDirEntry, RT_OFFSETOF(RTDIRENTRYEX, szName[2])),
411	VERR_INVALID_PARAMETER);
412	}
413
414	/*
415	* Fetch more data if necessary and/or convert the name.
416	*/
417	int rc = rtDirReadMore(pDir);
418	if (RT_SUCCESS(rc))
419	{
420	/*
421	* Check if we've got enough space to return the data.
422	*/
423	#ifdef RT_DONT_CONVERT_FILENAMES
424	const char *pszName = pDir->Data.d_name;
425	const size_t cchName = strlen(pszName);
426	#else
427	const char *pszName = pDir->pszName;
428	const size_t cchName = pDir->cchName;
429	#endif
430	const size_t cbRequired = RT_OFFSETOF(RTDIRENTRYEX, szName[1]) + cchName;
431	if (pcbDirEntry)
432	*pcbDirEntry = cbRequired;
433	if (cbRequired <= cbDirEntry)
434	{
435	/*
436	* Setup the returned data.
437	*/
438	pDirEntry->cwcShortName = 0;
439	pDirEntry->wszShortName[0] = 0;
440	pDirEntry->cbName = (uint16_t)cchName;
441	Assert(pDirEntry->cbName == cchName);
442	memcpy(pDirEntry->szName, pszName, cchName + 1);
443
444	/* get the info data */
445	size_t cch = cchName + pDir->cchPath + 1;
446	char pszNamePath = (char )alloca(cch);
447	if (pszNamePath)
448	{
449	memcpy(pszNamePath, pDir->pszPath, pDir->cchPath);
450	memcpy(pszNamePath + pDir->cchPath, pszName, cchName + 1);
451	rc = RTPathQueryInfoEx(pszNamePath, &pDirEntry->Info, enmAdditionalAttribs, fFlags);
452	}
453	else
454	rc = VERR_NO_MEMORY;
455	if (RT_FAILURE(rc))
456	{
457	#ifdef HAVE_DIRENT_D_TYPE
458	rtDirSetDummyInfo(&pDirEntry->Info, rtDirType(pDir->Data.d_type));
459	#else
460	rtDirSetDummyInfo(&pDirEntry->Info, RTDIRENTRYTYPE_UNKNOWN);
461	#endif
462	rc = VWRN_NO_DIRENT_INFO;
463	}
464
465	/* free cached data */
466	pDir->fDataUnread = false;
467	#ifndef RT_DONT_CONVERT_FILENAMES
468	RTStrFree(pDir->pszName);
469	pDir->pszName = NULL;
470	#endif
471	}
472	else
473	rc = VERR_BUFFER_OVERFLOW;
474	}
475
476	return rc;
477	}
478
479
480	RTDECL(int) RTDirRename(const char pszSrc, const char pszDst, unsigned fRename)
481	{
482	/*
483	* Validate input.
484	*/
485	AssertMsgReturn(VALID_PTR(pszSrc), ("%p\n", pszSrc), VERR_INVALID_POINTER);
486	AssertMsgReturn(VALID_PTR(pszDst), ("%p\n", pszDst), VERR_INVALID_POINTER);
487	AssertMsgReturn(*pszSrc, ("%p\n", pszSrc), VERR_INVALID_PARAMETER);
488	AssertMsgReturn(*pszDst, ("%p\n", pszDst), VERR_INVALID_PARAMETER);
489	AssertMsgReturn(!(fRename & ~RTPATHRENAME_FLAGS_REPLACE), ("%#x\n", fRename), VERR_INVALID_PARAMETER);
490
491	/*
492	* Take common cause with RTPathRename.
493	*/
494	int rc = rtPathPosixRename(pszSrc, pszDst, fRename, RTFS_TYPE_DIRECTORY);
495
496	LogFlow(("RTDirRename(%p:{%s}, %p:{%s}): returns %Rrc\n",
497	pszSrc, pszSrc, pszDst, pszDst, rc));
498	return rc;
499	}
500

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source: vbox/trunk/src/VBox/Runtime/r3/posix/dir-posix.cpp@ 25776

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