dir.h

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1	/** @file
2	* IPRT - Directory Manipulation.
3	*/
4
5	/*
6	* Copyright (C) 2006-2024 Oracle and/or its affiliates.
7	*
8	* This file is part of VirtualBox base platform packages, as
9	* available from https://www.virtualbox.org.
10	*
11	* This program is free software; you can redistribute it and/or
12	* modify it under the terms of the GNU General Public License
13	* as published by the Free Software Foundation, in version 3 of the
14	* License.
15	*
16	* This program is distributed in the hope that it will be useful, but
17	* WITHOUT ANY WARRANTY; without even the implied warranty of
18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19	* General Public License for more details.
20	*
21	* You should have received a copy of the GNU General Public License
22	* along with this program; if not, see <https://www.gnu.org/licenses>.
23	*
24	* The contents of this file may alternatively be used under the terms
25	* of the Common Development and Distribution License Version 1.0
26	* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
27	* in the VirtualBox distribution, in which case the provisions of the
28	* CDDL are applicable instead of those of the GPL.
29	*
30	* You may elect to license modified versions of this file under the
31	* terms and conditions of either the GPL or the CDDL or both.
32	*
33	* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
34	*/
35
36	#ifndef IPRT_INCLUDED_dir_h
37	#define IPRT_INCLUDED_dir_h
38	#ifndef RT_WITHOUT_PRAGMA_ONCE
39	# pragma once
40	#endif
41
42	#include <iprt/cdefs.h>
43	#include <iprt/types.h>
44	#include <iprt/fs.h>
45	#include <iprt/symlink.h>
46
47
48	RT_C_DECLS_BEGIN
49
50	/** @defgroup grp_rt_dir RTDir - Directory Manipulation
51	* @ingroup grp_rt
52	* @{
53	*/
54
55	/**
56	* Check for the existence of a directory.
57	*
58	* All symbolic links will be attemped resolved. If that is undesirable, please
59	* use RTPathQueryInfo instead.
60	*
61	* @returns true if exist and is a directory.
62	* @returns false if not exists or isn't a directory.
63	* @param pszPath Path to the directory.
64	*/
65	RTDECL(bool) RTDirExists(const char *pszPath);
66
67	/** @name RTDirCreate flags.
68	* @{ */
69	/** Don't allow symbolic links as part of the path.
70	* @remarks this flag is currently not implemented and will be ignored. */
71	#define RTDIRCREATE_FLAGS_NO_SYMLINKS RT_BIT(0)
72	/** Set the not-content-indexed flag (default). Windows only atm. */
73	#define RTDIRCREATE_FLAGS_NOT_CONTENT_INDEXED_DONT_SET RT_BIT(1)
74	/** Do not set the not-content-indexed flag. Windows only atm. */
75	#define RTDIRCREATE_FLAGS_NOT_CONTENT_INDEXED_SET UINT32_C(0)
76	/** Ignore errors setting the not-content-indexed flag. Windows only atm. */
77	#define RTDIRCREATE_FLAGS_NOT_CONTENT_INDEXED_NOT_CRITICAL RT_BIT(2)
78	/** Ignore umask when applying the mode. */
79	#define RTDIRCREATE_FLAGS_IGNORE_UMASK RT_BIT(3)
80	/** Valid mask. */
81	#define RTDIRCREATE_FLAGS_VALID_MASK UINT32_C(0x0000000f)
82	/** @} */
83
84	/**
85	* Creates a directory.
86	*
87	* @returns iprt status code.
88	* @param pszPath Path to the directory to create.
89	* @param fMode The mode of the new directory.
90	* @param fCreate Create flags, RTDIRCREATE_FLAGS_*.
91	*/
92	RTDECL(int) RTDirCreate(const char *pszPath, RTFMODE fMode, uint32_t fCreate);
93
94	/**
95	* Creates a directory including all non-existing parent directories.
96	*
97	* @returns iprt status code.
98	* @param pszPath Path to the directory to create.
99	* @param fMode The mode of the new directories.
100	*/
101	RTDECL(int) RTDirCreateFullPath(const char *pszPath, RTFMODE fMode);
102
103	/**
104	* Creates a directory including all non-existing parent directories.
105	*
106	* @returns iprt status code.
107	* @param pszPath Path to the directory to create.
108	* @param fMode The mode of the new directories.
109	* @param fFlags Create flags, RTDIRCREATE_FLAGS_*.
110	*/
111	RTDECL(int) RTDirCreateFullPathEx(const char *pszPath, RTFMODE fMode, uint32_t fFlags);
112
113	/**
114	* Creates a new directory with a unique name using the given template.
115	*
116	* One or more trailing X'es in the template will be replaced by random alpha
117	* numeric characters until a RTDirCreate succeeds or we run out of patience.
118	* For instance:
119	* "/tmp/myprog-XXXXXX"
120	*
121	* As an alternative to trailing X'es, it
122	* is possible to put 3 or more X'es somewhere inside the directory name. In
123	* the following string only the last bunch of X'es will be modified:
124	* "/tmp/myprog-XXX-XXX.tmp"
125	*
126	* @returns iprt status code.
127	* @param pszTemplate The directory name template on input. The actual
128	* directory name on success. Empty string on failure.
129	* @param fMode The mode to create the directory with. Use 0700
130	* unless you have reason not to.
131	*/
132	RTDECL(int) RTDirCreateTemp(char *pszTemplate, RTFMODE fMode);
133
134	/**
135	* Secure version of @a RTDirCreateTemp with a fixed mode of 0700.
136	*
137	* This function behaves in the same way as @a RTDirCreateTemp with two
138	* additional points. Firstly the mode is fixed to 0700. Secondly it will
139	* fail if it is not possible to perform the operation securely. Possible
140	* reasons include that the directory could be removed by another unprivileged
141	* user before it is used (e.g. if is created in a non-sticky /tmp directory)
142	* or that the path contains symbolic links which another unprivileged user
143	* could manipulate; however the exact criteria will be specified on a
144	* platform-by-platform basis as platform support is added.
145	* @see RTPathIsSecure for the current list of criteria.
146	* @returns iprt status code.
147	* @returns VERR_NOT_SUPPORTED if the interface can not be supported on the
148	* current platform at this time.
149	* @returns VERR_INSECURE if the directory could not be created securely.
150	* @param pszTemplate The directory name template on input. The
151	* actual directory name on success. Empty string
152	* on failure.
153	*/
154	RTDECL(int) RTDirCreateTempSecure(char *pszTemplate);
155
156	/**
157	* Creates a new directory with a unique name by appending a number.
158	*
159	* This API differs from RTDirCreateTemp & RTDirCreateTempSecure in that it
160	* first tries to create the directory without any random bits, thus the best
161	* case result will be prettier. It also differs in that it does not take a
162	* template, but is instead given a template description, and will only use
163	* digits for the filling.
164	*
165	* For sake of convenience and debugging , the current implementation
166	* starts at 0 and will increment sequentally for a while before switching to
167	* random numbers.
168	*
169	* On success @a pszPath contains the path created.
170	*
171	* @returns iprt status code.
172	* @param pszPath The path to the directory. On input the base template
173	* name. On successful return, the unique directory we
174	* created.
175	* @param cbSize The size of the pszPath buffer. Needs enough space for
176	* holding the digits and the optional separator.
177	* @param fMode The mode of the new directory.
178	* @param cchDigits How many digits should the number have (zero padded).
179	* @param chSep The separator used between the path and the number. Can
180	* be zero. (optional)
181	*/
182	RTDECL(int) RTDirCreateUniqueNumbered(char *pszPath, size_t cbSize, RTFMODE fMode, size_t cchDigits, char chSep);
183
184	/**
185	* Removes a directory if empty.
186	*
187	* @returns iprt status code.
188	* @param pszPath Path to the directory to remove.
189	*/
190	RTDECL(int) RTDirRemove(const char *pszPath);
191
192	/**
193	* Removes a directory tree recursively.
194	*
195	* @returns iprt status code.
196	* @param pszPath Path to the directory to remove recursively.
197	* @param fFlags Flags, see RTDIRRMREC_F_XXX.
198	*
199	* @remarks This will not work on a root directory.
200	*/
201	RTDECL(int) RTDirRemoveRecursive(const char *pszPath, uint32_t fFlags);
202
203	/** @name RTDirRemoveRecursive flags.
204	* @{ */
205	/** Delete the content of the directory and the directory itself. */
206	#define RTDIRRMREC_F_CONTENT_AND_DIR UINT32_C(0)
207	/** Only delete the content of the directory, omit the directory it self. */
208	#define RTDIRRMREC_F_CONTENT_ONLY RT_BIT_32(0)
209	/** Long path hack: Don't apply RTPathAbs to the path. */
210	#define RTDIRRMREC_F_NO_ABS_PATH RT_BIT_32(1)
211	/** Mask of valid flags. */
212	#define RTDIRRMREC_F_VALID_MASK UINT32_C(0x00000003)
213	/** @} */
214
215	/**
216	* Flushes the specified directory.
217	*
218	* This API is not implemented on all systems. On some systems it may be
219	* unnecessary if you've already flushed the file. If you really care for your
220	* data and is entering dangerous territories, it doesn't hurt calling it after
221	* flushing and closing the file.
222	*
223	* @returns IPRT status code.
224	* @retval VERR_NOT_IMPLEMENTED must be expected.
225	* @retval VERR_NOT_SUPPORTED must be expected.
226	* @param pszPath Path to the directory.
227	*/
228	RTDECL(int) RTDirFlush(const char *pszPath);
229
230	/**
231	* Flushes the parent directory of the specified file.
232	*
233	* This is just a wrapper around RTDirFlush.
234	*
235	* @returns IPRT status code, see RTDirFlush for details.
236	* @param pszChild Path to the file which parent should be flushed.
237	*/
238	RTDECL(int) RTDirFlushParent(const char *pszChild);
239
240
241
242	/**
243	* Filter option for RTDirOpenFiltered().
244	*/
245	typedef enum RTDIRFILTER
246	{
247	/** The usual invalid 0 entry. */
248	RTDIRFILTER_INVALID = 0,
249	/** No filter should be applied (and none was specified). */
250	RTDIRFILTER_NONE,
251	/** The Windows NT filter.
252	* The following wildcard chars: *, ?, <, > and "
253	* The matching is done on the uppercased strings. */
254	RTDIRFILTER_WINNT,
255	/** The UNIX filter.
256	* The following wildcard chars: *, ?, [..]
257	* The matching is done on exact case. */
258	RTDIRFILTER_UNIX,
259	/** The UNIX filter, uppercased matching.
260	* Same as RTDIRFILTER_UNIX except that the strings are uppercased before comparing. */
261	RTDIRFILTER_UNIX_UPCASED,
262
263	/** The usual full 32-bit value. */
264	RTDIRFILTER_32BIT_HACK = 0x7fffffff
265	} RTDIRFILTER;
266
267
268	/**
269	* Directory entry type.
270	*
271	* This is the RTFS_TYPE_MASK stuff shifted down 12 bits and
272	* identical to the BSD/LINUX ABI. See RTFS_TYPE_DIRENTRYTYPE_SHIFT.
273	*/
274	typedef enum RTDIRENTRYTYPE
275	{
276	/** Unknown type (DT_UNKNOWN). */
277	RTDIRENTRYTYPE_UNKNOWN = 0,
278	/** Named pipe (fifo) (DT_FIFO). */
279	RTDIRENTRYTYPE_FIFO = 001,
280	/** Character device (DT_CHR). */
281	RTDIRENTRYTYPE_DEV_CHAR = 002,
282	/** Directory (DT_DIR). */
283	RTDIRENTRYTYPE_DIRECTORY = 004,
284	/** Block device (DT_BLK). */
285	RTDIRENTRYTYPE_DEV_BLOCK = 006,
286	/** Regular file (DT_REG). */
287	RTDIRENTRYTYPE_FILE = 010,
288	/** Symbolic link (DT_LNK). */
289	RTDIRENTRYTYPE_SYMLINK = 012,
290	/** Socket (DT_SOCK). */
291	RTDIRENTRYTYPE_SOCKET = 014,
292	/** Whiteout (DT_WHT). */
293	RTDIRENTRYTYPE_WHITEOUT = 016
294	} RTDIRENTRYTYPE;
295
296
297	/**
298	* Directory entry.
299	*
300	* This is inspired by the POSIX interfaces.
301	*/
302	#pragma pack(1)
303	typedef struct RTDIRENTRY
304	{
305	/** The unique identifier (within the file system) of this file system object (d_ino).
306	*
307	* Together with INodeIdDevice, this field can be used as a OS wide unique id
308	* when both their values are not 0. This field is 0 if the information is not
309	* available. */
310	RTINODE INodeId;
311	/** The entry type. (d_type)
312	*
313	* @warning RTDIRENTRYTYPE_UNKNOWN is a common return value here since not all
314	* file systems (or Unixes) stores the type of a directory entry and
315	* instead expects the user to use stat() to get it. So, when you see
316	* this you should use RTDirQueryUnknownType or RTDirQueryUnknownTypeEx
317	* to get the type, or if if you're lazy, use RTDirReadEx.
318	*/
319	RTDIRENTRYTYPE enmType;
320	/** The length of the filename, excluding the terminating nul character. */
321	uint16_t cbName;
322	/** The filename. (no path)
323	* Using the pcbDirEntry parameter of RTDirRead makes this field variable in size. */
324	char szName[260];
325	} RTDIRENTRY;
326	#pragma pack()
327	/** Pointer to a directory entry. */
328	typedef RTDIRENTRY *PRTDIRENTRY;
329	/** Pointer to a const directory entry. */
330	typedef RTDIRENTRY const *PCRTDIRENTRY;
331
332
333	/**
334	* Directory entry with extended information.
335	*
336	* This is inspired by the PC interfaces.
337	*/
338	#pragma pack(1)
339	typedef struct RTDIRENTRYEX
340	{
341	/** Full information about the object. */
342	RTFSOBJINFO Info;
343	/** The length of the short field (number of RTUTF16 entries (not chars)).
344	* It is 16-bit for reasons of alignment. */
345	uint16_t cwcShortName;
346	/** The short name for 8.3 compatibility.
347	* Empty string if not available.
348	* Since the length is a bit tricky for a UTF-8 encoded name, and since this
349	* is practically speaking only a windows thing, it is encoded as UCS-2. */
350	RTUTF16 wszShortName[14];
351	/** The length of the filename. */
352	uint16_t cbName;
353	/** The filename. (no path)
354	* Using the pcbDirEntry parameter of RTDirReadEx makes this field variable in size. */
355	char szName[260];
356	} RTDIRENTRYEX;
357	#pragma pack()
358	/** Pointer to a directory entry. */
359	typedef RTDIRENTRYEX *PRTDIRENTRYEX;
360	/** Pointer to a const directory entry. */
361	typedef RTDIRENTRYEX const *PCRTDIRENTRYEX;
362
363
364	/**
365	* Opens a directory.
366	*
367	* @returns iprt status code.
368	* @param phDir Where to store the open directory handle.
369	* @param pszPath Path to the directory to open.
370	*/
371	RTDECL(int) RTDirOpen(RTDIR phDir, const char pszPath);
372
373	/** @name RTDIR_F_XXX - RTDirOpenFiltered flags.
374	* @{ */
375	/** Don't allow symbolic links as part of the path.
376	* @remarks this flag is currently not implemented and will be ignored. */
377	#define RTDIR_F_NO_SYMLINKS RT_BIT_32(0)
378	/** Deny relative opening of anything above this directory. */
379	#define RTDIR_F_DENY_ASCENT RT_BIT_32(1)
380	/** Don't follow symbolic links in the final component. */
381	#define RTDIR_F_NO_FOLLOW RT_BIT_32(2)
382	/** Long path hack: Don't apply RTPathAbs to the path. */
383	#define RTDIR_F_NO_ABS_PATH RT_BIT_32(3)
384	/** Valid flag mask. */
385	#define RTDIR_F_VALID_MASK UINT32_C(0x0000000f)
386	/** @} */
387
388	/**
389	* Opens a directory with flags and optional filtering.
390	*
391	* @returns IPRT status code.
392	* @retval VERR_IS_A_SYMLINK if RTDIR_F_NO_FOLLOW is set, @a enmFilter is
393	* RTDIRFILTER_NONE and @a pszPath points to a symbolic link and does
394	* not end with a slash. Note that on Windows this does not apply to
395	* file symlinks, only directory symlinks, for the file variant
396	* VERR_NOT_A_DIRECTORY will be returned.
397	*
398	* @param phDir Where to store the open directory handle.
399	* @param pszPath Path to the directory to search, this must include wildcards.
400	* @param enmFilter The kind of filter to apply. Setting this to RTDIRFILTER_NONE makes
401	* this function behave like RTDirOpen.
402	* @param fFlags Open flags, RTDIR_F_XXX.
403	*
404	*/
405	RTDECL(int) RTDirOpenFiltered(RTDIR phDir, const char pszPath, RTDIRFILTER enmFilter, uint32_t fFlags);
406
407	/**
408	* Closes a directory.
409	*
410	* @returns iprt status code.
411	* @param hDir Handle to open directory returned by RTDirOpen() or
412	* RTDirOpenFiltered().
413	*/
414	RTDECL(int) RTDirClose(RTDIR hDir);
415
416	/**
417	* Checks if the supplied directory handle is valid.
418	*
419	* @returns true if valid.
420	* @returns false if invalid.
421	* @param hDir The directory handle.
422	*/
423	RTDECL(bool) RTDirIsValid(RTDIR hDir);
424
425	/**
426	* Reads the next entry in the directory.
427	*
428	* @returns VINF_SUCCESS and data in pDirEntry on success.
429	* @returns VERR_NO_MORE_FILES when the end of the directory has been reached.
430	* @returns VERR_BUFFER_OVERFLOW if the buffer is too small to contain the filename. If
431	* pcbDirEntry is specified it will be updated with the required buffer size.
432	* @returns suitable iprt status code on other errors.
433	*
434	* @param hDir Handle to the open directory.
435	* @param pDirEntry Where to store the information about the next
436	* directory entry on success.
437	* @param pcbDirEntry Optional parameter used for variable buffer size.
438	*
439	* On input the variable pointed to contains the size of the pDirEntry
440	* structure. This must be at least OFFSET(RTDIRENTRY, szName[2]) bytes.
441	*
442	* On successful output the field is updated to
443	* OFFSET(RTDIRENTRY, szName[pDirEntry->cbName + 1]).
444	*
445	* When the data doesn't fit in the buffer and VERR_BUFFER_OVERFLOW is
446	* returned, this field contains the required buffer size.
447	*
448	* The value is unchanged in all other cases.
449	*/
450	RTDECL(int) RTDirRead(RTDIR hDir, PRTDIRENTRY pDirEntry, size_t *pcbDirEntry);
451
452	/**
453	* Reads the next entry in the directory returning extended information.
454	*
455	* @returns VINF_SUCCESS and data in pDirEntry on success.
456	* @returns VERR_NO_MORE_FILES when the end of the directory has been reached.
457	* @returns VERR_BUFFER_OVERFLOW if the buffer is too small to contain the filename. If
458	* pcbDirEntry is specified it will be updated with the required buffer size.
459	* @returns suitable iprt status code on other errors.
460	*
461	* @param hDir Handle to the open directory.
462	* @param pDirEntry Where to store the information about the next
463	* directory entry on success.
464	* @param pcbDirEntry Optional parameter used for variable buffer size.
465	*
466	* On input the variable pointed to contains the size of the pDirEntry
467	* structure. This must be at least OFFSET(RTDIRENTRYEX, szName[2]) bytes.
468	*
469	* On successful output the field is updated to
470	* OFFSET(RTDIRENTRYEX, szName[pDirEntry->cbName + 1]).
471	*
472	* When the data doesn't fit in the buffer and VERR_BUFFER_OVERFLOW is
473	* returned, this field contains the required buffer size.
474	*
475	* The value is unchanged in all other cases.
476	* @param enmAdditionalAttribs
477	* Which set of additional attributes to request.
478	* Use RTFSOBJATTRADD_NOTHING if this doesn't matter.
479	* @param fFlags RTPATH_F_ON_LINK or RTPATH_F_FOLLOW_LINK.
480	*/
481	RTDECL(int) RTDirReadEx(RTDIR hDir, PRTDIRENTRYEX pDirEntry, size_t *pcbDirEntry, RTFSOBJATTRADD enmAdditionalAttribs, uint32_t fFlags);
482
483	/**
484	* Wrapper around RTDirReadEx that does the directory entry buffer handling.
485	*
486	* Call RTDirReadExAFree to free the buffers allocated by this function.
487	*
488	* @returns IPRT status code, see RTDirReadEx() for details.
489	*
490	* @param hDir Handle to the open directory.
491	* @param ppDirEntry Pointer to the directory entry pointer. Initialize this
492	* to NULL before the first call.
493	* @param pcbDirEntry Where the API caches the allocation size. Set this to
494	* zero before the first call.
495	* @param enmAddAttr See RTDirReadEx.
496	* @param fFlags See RTDirReadEx.
497	*/
498	RTDECL(int) RTDirReadExA(RTDIR hDir, PRTDIRENTRYEX ppDirEntry, size_t pcbDirEntry, RTFSOBJATTRADD enmAddAttr, uint32_t fFlags);
499
500	/**
501	* Frees the buffer allocated by RTDirReadExA.
502	*
503	* @param ppDirEntry Pointer to the directory entry pointer.
504	* @param pcbDirEntry Where the API caches the allocation size.
505	*/
506	RTDECL(void) RTDirReadExAFree(PRTDIRENTRYEX ppDirEntry, size_t pcbDirEntry);
507
508	/**
509	* Resolves RTDIRENTRYTYPE_UNKNOWN values returned by RTDirRead.
510	*
511	* @returns IPRT status code (see RTPathQueryInfo).
512	* @param pszComposedName The path to the directory entry. The caller must
513	* compose this, it's NOT sufficient to pass
514	* RTDIRENTRY::szName!
515	* @param fFollowSymlinks Whether to follow symbolic links or not.
516	* @param penmType Pointer to the RTDIRENTRY::enmType member. If this
517	* is not RTDIRENTRYTYPE_UNKNOWN and, if
518	* @a fFollowSymlinks is false, not
519	* RTDIRENTRYTYPE_SYMLINK, the function will return
520	* immediately without doing anything. Otherwise it
521	* will use RTPathQueryInfo to try figure out the
522	* correct value. On failure, this will be unchanged.
523	*/
524	RTDECL(int) RTDirQueryUnknownType(const char pszComposedName, bool fFollowSymlinks, RTDIRENTRYTYPE penmType);
525
526	/**
527	* Resolves RTDIRENTRYTYPE_UNKNOWN values returned by RTDirRead, extended
528	* version.
529	*
530	* @returns IPRT status code (see RTPathQueryInfo).
531	* @param pszComposedName The path to the directory entry. The caller must
532	* compose this, it's NOT sufficient to pass
533	* RTDIRENTRY::szName!
534	* @param fFollowSymlinks Whether to follow symbolic links or not.
535	* @param penmType Pointer to the RTDIRENTRY::enmType member or
536	* similar. Will NOT be checked on input.
537	* @param pObjInfo The object info buffer to use with RTPathQueryInfo.
538	*/
539	RTDECL(int) RTDirQueryUnknownTypeEx(const char pszComposedName, bool fFollowSymlinks, RTDIRENTRYTYPE penmType, PRTFSOBJINFO pObjInfo);
540
541	/**
542	* Checks if the directory entry returned by RTDirRead is '.', '..' or similar.
543	*
544	* @returns true / false.
545	* @param pDirEntry The directory entry to check.
546	*/
547	RTDECL(bool) RTDirEntryIsStdDotLink(PRTDIRENTRY pDirEntry);
548
549	/**
550	* Checks if the directory entry returned by RTDirReadEx is '.', '..' or
551	* similar.
552	*
553	* @returns true / false.
554	* @param pDirEntryEx The extended directory entry to check.
555	*/
556	RTDECL(bool) RTDirEntryExIsStdDotLink(PCRTDIRENTRYEX pDirEntryEx);
557
558	/**
559	* Rewind and restart the directory reading.
560	*
561	* @returns IRPT status code.
562	* @param hDir The directory handle to rewind.
563	*/
564	RTDECL(int) RTDirRewind(RTDIR hDir);
565
566	/**
567	* Renames a file.
568	*
569	* Identical to RTPathRename except that it will ensure that the source is a directory.
570	*
571	* @returns IPRT status code.
572	* @returns VERR_ALREADY_EXISTS if the destination file exists.
573	*
574	* @param pszSrc The path to the source file.
575	* @param pszDst The path to the destination file.
576	* This file will be created.
577	* @param fRename See RTPathRename.
578	*/
579	RTDECL(int) RTDirRename(const char pszSrc, const char pszDst, unsigned fRename);
580
581
582	/**
583	* Query information about an open directory.
584	*
585	* @returns iprt status code.
586	*
587	* @param hDir Handle to the open directory.
588	* @param pObjInfo Object information structure to be filled on successful return.
589	* @param enmAdditionalAttribs Which set of additional attributes to request.
590	* Use RTFSOBJATTRADD_NOTHING if this doesn't matter.
591	*/
592	RTR3DECL(int) RTDirQueryInfo(RTDIR hDir, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAdditionalAttribs);
593
594
595	/**
596	* Changes one or more of the timestamps associated of file system object.
597	*
598	* @returns iprt status code.
599	* @returns VERR_NOT_SUPPORTED is returned if the operation isn't supported by the OS.
600	*
601	* @param hDir Handle to the open directory.
602	* @param pAccessTime Pointer to the new access time. NULL if not to be changed.
603	* @param pModificationTime Pointer to the new modifcation time. NULL if not to be changed.
604	* @param pChangeTime Pointer to the new change time. NULL if not to be changed.
605	* @param pBirthTime Pointer to the new time of birth. NULL if not to be changed.
606	*
607	* @remark The file system might not implement all these time attributes,
608	* the API will ignore the ones which aren't supported.
609	*
610	* @remark The file system might not implement the time resolution
611	* employed by this interface, the time will be chopped to fit.
612	*
613	* @remark The file system may update the change time even if it's
614	* not specified.
615	*
616	* @remark POSIX can only set Access & Modification and will always set both.
617	*/
618	RTR3DECL(int) RTDirSetTimes(RTDIR hDir, PCRTTIMESPEC pAccessTime, PCRTTIMESPEC pModificationTime,
619	PCRTTIMESPEC pChangeTime, PCRTTIMESPEC pBirthTime);
620
621
622	/**
623	* Changes the mode flags of an open directory.
624	*
625	* The API requires at least one of the mode flag sets (Unix/Dos) to
626	* be set. The type is ignored.
627	*
628	* @returns iprt status code.
629	* @param hDir Handle to the open directory.
630	* @param fMode The new file mode, see @ref grp_rt_fs for details.
631	*/
632	RTDECL(int) RTDirSetMode(RTDIR hDir, RTFMODE fMode);
633
634
635	/** @defgroup grp_rt_dir_rel Directory relative APIs
636	*
637	* This group of APIs allows working with paths that are relative to an open
638	* directory, therebye eliminating some classic path related race conditions on
639	* systems with native support for these kinds of operations.
640	*
641	* On NT (Windows) there is native support for addressing files, directories and
642	* stuff _below_ the open directory. It is not possible to go upwards
643	* (hDir:../../grandparent), at least not with NTFS, forcing us to use the
644	* directory path as a fallback and opening us to potential races.
645	*
646	* On most unix-like systems here is now native support for all of this.
647	*
648	* @{ */
649
650	/**
651	* Open a file relative to @a hDir.
652	*
653	* @returns IPRT status code.
654	* @param hDir The directory to open relative to.
655	* @param pszRelFilename The relative path to the file.
656	* @param fOpen Open flags, i.e a combination of the RTFILE_O_XXX
657	* defines. The ACCESS, ACTION and DENY flags are
658	* mandatory!
659	* @param phFile Where to store the handle to the opened file.
660	*
661	* @sa RTFileOpen
662	*/
663	RTDECL(int) RTDirRelFileOpen(RTDIR hDir, const char *pszRelFilename, uint64_t fOpen, PRTFILE phFile);
664
665
666
667	/**
668	* Opens a directory relative to @a hDir.
669	*
670	* @returns IPRT status code.
671	* @param hDir The directory to open relative to.
672	* @param pszDir The relative path to the directory to open.
673	* @param phDir Where to store the directory handle.
674	*
675	* @sa RTDirOpen
676	*/
677	RTDECL(int) RTDirRelDirOpen(RTDIR hDir, const char pszDir, RTDIR phDir);
678
679	/**
680	* Opens a directory relative to @a hDir, with flags and optional filtering.
681	*
682	* @returns IPRT status code.
683	* @retval VERR_IS_A_SYMLINK if RTDIR_F_NO_FOLLOW is set, @a enmFilter is
684	* RTDIRFILTER_NONE and @a pszPath points to a symbolic link and does
685	* not end with a slash. Note that on Windows this does not apply to
686	* file symlinks, only directory symlinks, for the file variant
687	* VERR_NOT_A_DIRECTORY will be returned.
688	*
689	* @param hDir The directory to open relative to.
690	* @param pszDirAndFilter The relative path to the directory to search, this
691	* must include wildcards.
692	* @param enmFilter The kind of filter to apply. Setting this to
693	* RTDIRFILTER_NONE makes this function behave like
694	* RTDirOpen.
695	* @param fFlags Open flags, RTDIR_F_XXX.
696	* @param phDir Where to store the directory handle.
697	*
698	* @sa RTDirOpenFiltered
699	*/
700	RTDECL(int) RTDirRelDirOpenFiltered(RTDIR hDir, const char *pszDirAndFilter, RTDIRFILTER enmFilter,
701	uint32_t fFlags, RTDIR *phDir);
702
703	/**
704	* Creates a directory relative to @a hDir.
705	*
706	* @returns IPRT status code.
707	* @param hDir The directory @a pszRelPath is relative to.
708	* @param pszRelPath The relative path to the directory to create.
709	* @param fMode The mode of the new directory.
710	* @param fCreate Create flags, RTDIRCREATE_FLAGS_XXX.
711	* @param phSubDir Where to return the handle of the created directory.
712	* Optional.
713	*
714	* @sa RTDirCreate
715	*/
716	RTDECL(int) RTDirRelDirCreate(RTDIR hDir, const char pszRelPath, RTFMODE fMode, uint32_t fCreate, RTDIR phSubDir);
717
718	/**
719	* Removes a directory relative to @a hDir if empty.
720	*
721	* @returns IPRT status code.
722	* @param hDir The directory @a pszRelPath is relative to.
723	* @param pszRelPath The relative path to the directory to remove.
724	*
725	* @sa RTDirRemove
726	*/
727	RTDECL(int) RTDirRelDirRemove(RTDIR hDir, const char *pszRelPath);
728
729
730	/**
731	* Query information about a file system object relative to @a hDir.
732	*
733	* @returns IPRT status code.
734	* @retval VINF_SUCCESS if the object exists, information returned.
735	* @retval VERR_PATH_NOT_FOUND if any but the last component in the specified
736	* path was not found or was not a directory.
737	* @retval VERR_FILE_NOT_FOUND if the object does not exist (but path to the
738	* parent directory exists).
739	*
740	* @param hDir The directory @a pszRelPath is relative to.
741	* @param pszRelPath The relative path to the file system object.
742	* @param pObjInfo Object information structure to be filled on successful
743	* return.
744	* @param enmAddAttr Which set of additional attributes to request.
745	* Use RTFSOBJATTRADD_NOTHING if this doesn't matter.
746	* @param fFlags RTPATH_F_ON_LINK or RTPATH_F_FOLLOW_LINK.
747	*
748	* @sa RTPathQueryInfoEx
749	*/
750	RTDECL(int) RTDirRelPathQueryInfo(RTDIR hDir, const char *pszRelPath, PRTFSOBJINFO pObjInfo,
751	RTFSOBJATTRADD enmAddAttr, uint32_t fFlags);
752
753	/**
754	* Changes the mode flags of a file system object relative to @a hDir.
755	*
756	* The API requires at least one of the mode flag sets (Unix/Dos) to
757	* be set. The type is ignored.
758	*
759	* @returns IPRT status code.
760	* @param hDir The directory @a pszRelPath is relative to.
761	* @param pszRelPath The relative path to the file system object.
762	* @param fMode The new file mode, see @ref grp_rt_fs for details.
763	* @param fFlags RTPATH_F_ON_LINK or RTPATH_F_FOLLOW_LINK.
764	*
765	* @sa RTPathSetMode
766	*/
767	RTDECL(int) RTDirRelPathSetMode(RTDIR hDir, const char *pszRelPath, RTFMODE fMode, uint32_t fFlags);
768
769	/**
770	* Changes one or more of the timestamps associated of file system object
771	* relative to @a hDir.
772	*
773	* @returns IPRT status code.
774	* @param hDir The directory @a pszRelPath is relative to.
775	* @param pszRelPath The relative path to the file system object.
776	* @param pAccessTime Pointer to the new access time.
777	* @param pModificationTime Pointer to the new modification time.
778	* @param pChangeTime Pointer to the new change time. NULL if not to be changed.
779	* @param pBirthTime Pointer to the new time of birth. NULL if not to be changed.
780	* @param fFlags RTPATH_F_ON_LINK or RTPATH_F_FOLLOW_LINK.
781	*
782	* @remark The file system might not implement all these time attributes,
783	* the API will ignore the ones which aren't supported.
784	*
785	* @remark The file system might not implement the time resolution
786	* employed by this interface, the time will be chopped to fit.
787	*
788	* @remark The file system may update the change time even if it's
789	* not specified.
790	*
791	* @remark POSIX can only set Access & Modification and will always set both.
792	*
793	* @sa RTPathSetTimesEx
794	*/
795	RTDECL(int) RTDirRelPathSetTimes(RTDIR hDir, const char *pszRelPath, PCRTTIMESPEC pAccessTime, PCRTTIMESPEC pModificationTime,
796	PCRTTIMESPEC pChangeTime, PCRTTIMESPEC pBirthTime, uint32_t fFlags);
797
798	/**
799	* Changes the owner and/or group of a file system object relative to @a hDir.
800	*
801	* @returns IPRT status code.
802	* @param hDir The directory @a pszRelPath is relative to.
803	* @param pszRelPath The relative path to the file system object.
804	* @param uid The new file owner user id. Pass NIL_RTUID to leave
805	* this unchanged.
806	* @param gid The new group id. Pass NIL_RTGID to leave this
807	* unchanged.
808	* @param fFlags RTPATH_F_ON_LINK or RTPATH_F_FOLLOW_LINK.
809	*
810	* @sa RTPathSetOwnerEx
811	*/
812	RTDECL(int) RTDirRelPathSetOwner(RTDIR hDir, const char *pszRelPath, uint32_t uid, uint32_t gid, uint32_t fFlags);
813
814	/**
815	* Renames a directory relative path within a filesystem.
816	*
817	* This will rename symbolic links. If RTPATHRENAME_FLAGS_REPLACE is used and
818	* pszDst is a symbolic link, it will be replaced and not its target.
819	*
820	* @returns IPRT status code.
821	* @param hDirSrc The directory the source path is relative to.
822	* @param pszSrc The source path, relative to @a hDirSrc.
823	* @param hDirDst The directory the destination path is relative to.
824	* @param pszDst The destination path, relative to @a hDirDst.
825	* @param fRename Rename flags, RTPATHRENAME_FLAGS_XXX.
826	*
827	* @sa RTPathRename
828	*/
829	RTDECL(int) RTDirRelPathRename(RTDIR hDirSrc, const char pszSrc, RTDIR hDirDst, const char pszDst, unsigned fRename);
830
831	/**
832	* Removes the last component of the directory relative path.
833	*
834	* @returns IPRT status code.
835	* @param hDir The directory @a pszRelPath is relative to.
836	* @param pszRelPath The relative path to the file system object.
837	* @param fUnlink Unlink flags, RTPATHUNLINK_FLAGS_XXX.
838	*
839	* @sa RTPathUnlink
840	*/
841	RTDECL(int) RTDirRelPathUnlink(RTDIR hDir, const char *pszRelPath, uint32_t fUnlink);
842
843
844
845	/**
846	* Creates a symbolic link (@a pszSymlink) relative to @a hDir targeting @a
847	* pszTarget.
848	*
849	* @returns IPRT status code.
850	* @param hDir The directory @a pszSymlink is relative to.
851	* @param pszSymlink The relative path of the symbolic link.
852	* @param pszTarget The path to the symbolic link target. This is
853	* relative to @a pszSymlink or an absolute path.
854	* @param enmType The symbolic link type. For Windows compatability
855	* it is very important to set this correctly. When
856	* RTSYMLINKTYPE_UNKNOWN is used, the API will try
857	* make a guess and may attempt query information
858	* about @a pszTarget in the process.
859	* @param fCreate Create flags, RTSYMLINKCREATE_FLAGS_XXX.
860	*
861	* @sa RTSymlinkCreate
862	*/
863	RTDECL(int) RTDirRelSymlinkCreate(RTDIR hDir, const char pszSymlink, const char pszTarget,
864	RTSYMLINKTYPE enmType, uint32_t fCreate);
865
866	/**
867	* Read the symlink target relative to @a hDir.
868	*
869	* @returns IPRT status code.
870	* @retval VERR_NOT_SYMLINK if @a pszSymlink does not specify a symbolic link.
871	* @retval VERR_BUFFER_OVERFLOW if the link is larger than @a cbTarget. The
872	* buffer will contain what all we managed to read, fully terminated
873	* if @a cbTarget > 0.
874	*
875	* @param hDir The directory @a pszSymlink is relative to.
876	* @param pszSymlink The relative path to the symbolic link that should
877	* be read.
878	* @param pszTarget The target buffer.
879	* @param cbTarget The size of the target buffer.
880	* @param fRead Read flags, RTSYMLINKREAD_FLAGS_XXX.
881	*
882	* @sa RTSymlinkRead
883	*/
884	RTDECL(int) RTDirRelSymlinkRead(RTDIR hDir, const char pszSymlink, char pszTarget, size_t cbTarget, uint32_t fRead);
885
886	/** @} */
887
888
889	/** @} */
890
891	RT_C_DECLS_END
892
893	#endif /* !IPRT_INCLUDED_dir_h */
894

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source: vbox/trunk/include/iprt/dir.h

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