dir.h@ 83941

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1	/** @file
2	* IPRT - Directory Manipulation.
3	*/
4
5	/*
6	* Copyright (C) 2006-2020 Oracle Corporation
7	*
8	* This file is part of VirtualBox Open Source Edition (OSE), as
9	* available from http://www.virtualbox.org. This file is free software;
10	* you can redistribute it and/or modify it under the terms of the GNU
11	* General Public License (GPL) as published by the Free Software
12	* Foundation, in version 2 as it comes in the "COPYING" file of the
13	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
14	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
15	*
16	* The contents of this file may alternatively be used under the terms
17	* of the Common Development and Distribution License Version 1.0
18	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
19	* VirtualBox OSE distribution, in which case the provisions of the
20	* CDDL are applicable instead of those of the GPL.
21	*
22	* You may elect to license modified versions of this file under the
23	* terms and conditions of either the GPL or the CDDL or both.
24	*/
25
26	#ifndef IPRT_INCLUDED_dir_h
27	#define IPRT_INCLUDED_dir_h
28	#ifndef RT_WITHOUT_PRAGMA_ONCE
29	# pragma once
30	#endif
31
32	#include <iprt/cdefs.h>
33	#include <iprt/types.h>
34	#include <iprt/fs.h>
35	#include <iprt/symlink.h>
36
37
38	RT_C_DECLS_BEGIN
39
40	/** @defgroup grp_rt_dir RTDir - Directory Manipulation
41	* @ingroup grp_rt
42	* @{
43	*/
44
45	/**
46	* Check for the existence of a directory.
47	*
48	* All symbolic links will be attemped resolved. If that is undesirable, please
49	* use RTPathQueryInfo instead.
50	*
51	* @returns true if exist and is a directory.
52	* @returns false if not exists or isn't a directory.
53	* @param pszPath Path to the directory.
54	*/
55	RTDECL(bool) RTDirExists(const char *pszPath);
56
57	/** @name RTDirCreate flags.
58	* @{ */
59	/** Don't allow symbolic links as part of the path.
60	* @remarks this flag is currently not implemented and will be ignored. */
61	#define RTDIRCREATE_FLAGS_NO_SYMLINKS RT_BIT(0)
62	/** Set the not-content-indexed flag (default). Windows only atm. */
63	#define RTDIRCREATE_FLAGS_NOT_CONTENT_INDEXED_DONT_SET RT_BIT(1)
64	/** Do not set the not-content-indexed flag. Windows only atm. */
65	#define RTDIRCREATE_FLAGS_NOT_CONTENT_INDEXED_SET UINT32_C(0)
66	/** Ignore errors setting the not-content-indexed flag. Windows only atm. */
67	#define RTDIRCREATE_FLAGS_NOT_CONTENT_INDEXED_NOT_CRITICAL RT_BIT(2)
68	/** Ignore umask when applying the mode. */
69	#define RTDIRCREATE_FLAGS_IGNORE_UMASK RT_BIT(3)
70	/** Valid mask. */
71	#define RTDIRCREATE_FLAGS_VALID_MASK UINT32_C(0x0000000f)
72	/** @} */
73
74	/**
75	* Creates a directory.
76	*
77	* @returns iprt status code.
78	* @param pszPath Path to the directory to create.
79	* @param fMode The mode of the new directory.
80	* @param fCreate Create flags, RTDIRCREATE_FLAGS_*.
81	*/
82	RTDECL(int) RTDirCreate(const char *pszPath, RTFMODE fMode, uint32_t fCreate);
83
84	/**
85	* Creates a directory including all non-existing parent directories.
86	*
87	* @returns iprt status code.
88	* @param pszPath Path to the directory to create.
89	* @param fMode The mode of the new directories.
90	*/
91	RTDECL(int) RTDirCreateFullPath(const char *pszPath, RTFMODE fMode);
92
93	/**
94	* Creates a directory including all non-existing parent directories.
95	*
96	* @returns iprt status code.
97	* @param pszPath Path to the directory to create.
98	* @param fMode The mode of the new directories.
99	* @param fFlags Create flags, RTDIRCREATE_FLAGS_*.
100	*/
101	RTDECL(int) RTDirCreateFullPathEx(const char *pszPath, RTFMODE fMode, uint32_t fFlags);
102
103	/**
104	* Creates a new directory with a unique name using the given template.
105	*
106	* One or more trailing X'es in the template will be replaced by random alpha
107	* numeric characters until a RTDirCreate succeeds or we run out of patience.
108	* For instance:
109	* "/tmp/myprog-XXXXXX"
110	*
111	* As an alternative to trailing X'es, it
112	* is possible to put 3 or more X'es somewhere inside the directory name. In
113	* the following string only the last bunch of X'es will be modified:
114	* "/tmp/myprog-XXX-XXX.tmp"
115	*
116	* @returns iprt status code.
117	* @param pszTemplate The directory name template on input. The actual
118	* directory name on success. Empty string on failure.
119	* @param fMode The mode to create the directory with. Use 0700
120	* unless you have reason not to.
121	*/
122	RTDECL(int) RTDirCreateTemp(char *pszTemplate, RTFMODE fMode);
123
124	/**
125	* Secure version of @a RTDirCreateTemp with a fixed mode of 0700.
126	*
127	* This function behaves in the same way as @a RTDirCreateTemp with two
128	* additional points. Firstly the mode is fixed to 0700. Secondly it will
129	* fail if it is not possible to perform the operation securely. Possible
130	* reasons include that the directory could be removed by another unprivileged
131	* user before it is used (e.g. if is created in a non-sticky /tmp directory)
132	* or that the path contains symbolic links which another unprivileged user
133	* could manipulate; however the exact criteria will be specified on a
134	* platform-by-platform basis as platform support is added.
135	* @see RTPathIsSecure for the current list of criteria.
136	* @returns iprt status code.
137	* @returns VERR_NOT_SUPPORTED if the interface can not be supported on the
138	* current platform at this time.
139	* @returns VERR_INSECURE if the directory could not be created securely.
140	* @param pszTemplate The directory name template on input. The
141	* actual directory name on success. Empty string
142	* on failure.
143	*/
144	RTDECL(int) RTDirCreateTempSecure(char *pszTemplate);
145
146	/**
147	* Creates a new directory with a unique name by appending a number.
148	*
149	* This API differs from RTDirCreateTemp & RTDirCreateTempSecure in that it
150	* first tries to create the directory without any random bits, thus the best
151	* case result will be prettier. It also differs in that it does not take a
152	* template, but is instead given a template description, and will only use
153	* digits for the filling.
154	*
155	* For sake of convenience and debugging , the current implementation
156	* starts at 0 and will increment sequentally for a while before switching to
157	* random numbers.
158	*
159	* On success @a pszPath contains the path created.
160	*
161	* @returns iprt status code.
162	* @param pszPath The path to the directory. On input the base template
163	* name. On successful return, the unique directory we
164	* created.
165	* @param cbSize The size of the pszPath buffer. Needs enough space for
166	* holding the digits and the optional separator.
167	* @param fMode The mode of the new directory.
168	* @param cchDigits How many digits should the number have (zero padded).
169	* @param chSep The separator used between the path and the number. Can
170	* be zero. (optional)
171	*/
172	RTDECL(int) RTDirCreateUniqueNumbered(char *pszPath, size_t cbSize, RTFMODE fMode, size_t cchDigits, char chSep);
173
174	/**
175	* Removes a directory if empty.
176	*
177	* @returns iprt status code.
178	* @param pszPath Path to the directory to remove.
179	*/
180	RTDECL(int) RTDirRemove(const char *pszPath);
181
182	/**
183	* Removes a directory tree recursively.
184	*
185	* @returns iprt status code.
186	* @param pszPath Path to the directory to remove recursively.
187	* @param fFlags Flags, see RTDIRRMREC_F_XXX.
188	*
189	* @remarks This will not work on a root directory.
190	*/
191	RTDECL(int) RTDirRemoveRecursive(const char *pszPath, uint32_t fFlags);
192
193	/** @name RTDirRemoveRecursive flags.
194	* @{ */
195	/** Delete the content of the directory and the directory itself. */
196	#define RTDIRRMREC_F_CONTENT_AND_DIR UINT32_C(0)
197	/** Only delete the content of the directory, omit the directory it self. */
198	#define RTDIRRMREC_F_CONTENT_ONLY RT_BIT_32(0)
199	/** Long path hack: Don't apply RTPathAbs to the path. */
200	#define RTDIRRMREC_F_NO_ABS_PATH RT_BIT_32(1)
201	/** Mask of valid flags. */
202	#define RTDIRRMREC_F_VALID_MASK UINT32_C(0x00000003)
203	/** @} */
204
205	/**
206	* Flushes the specified directory.
207	*
208	* This API is not implemented on all systems. On some systems it may be
209	* unnecessary if you've already flushed the file. If you really care for your
210	* data and is entering dangerous territories, it doesn't hurt calling it after
211	* flushing and closing the file.
212	*
213	* @returns IPRT status code.
214	* @retval VERR_NOT_IMPLEMENTED must be expected.
215	* @retval VERR_NOT_SUPPORTED must be expected.
216	* @param pszPath Path to the directory.
217	*/
218	RTDECL(int) RTDirFlush(const char *pszPath);
219
220	/**
221	* Flushes the parent directory of the specified file.
222	*
223	* This is just a wrapper around RTDirFlush.
224	*
225	* @returns IPRT status code, see RTDirFlush for details.
226	* @param pszChild Path to the file which parent should be flushed.
227	*/
228	RTDECL(int) RTDirFlushParent(const char *pszChild);
229
230
231
232	/**
233	* Filter option for RTDirOpenFiltered().
234	*/
235	typedef enum RTDIRFILTER
236	{
237	/** The usual invalid 0 entry. */
238	RTDIRFILTER_INVALID = 0,
239	/** No filter should be applied (and none was specified). */
240	RTDIRFILTER_NONE,
241	/** The Windows NT filter.
242	* The following wildcard chars: *, ?, <, > and "
243	* The matching is done on the uppercased strings. */
244	RTDIRFILTER_WINNT,
245	/** The UNIX filter.
246	* The following wildcard chars: *, ?, [..]
247	* The matching is done on exact case. */
248	RTDIRFILTER_UNIX,
249	/** The UNIX filter, uppercased matching.
250	* Same as RTDIRFILTER_UNIX except that the strings are uppercased before comparing. */
251	RTDIRFILTER_UNIX_UPCASED,
252
253	/** The usual full 32-bit value. */
254	RTDIRFILTER_32BIT_HACK = 0x7fffffff
255	} RTDIRFILTER;
256
257
258	/**
259	* Directory entry type.
260	*
261	* This is the RTFS_TYPE_MASK stuff shifted down 12 bits and
262	* identical to the BSD/LINUX ABI. See RTFS_TYPE_DIRENTRYTYPE_SHIFT.
263	*/
264	typedef enum RTDIRENTRYTYPE
265	{
266	/** Unknown type (DT_UNKNOWN). */
267	RTDIRENTRYTYPE_UNKNOWN = 0,
268	/** Named pipe (fifo) (DT_FIFO). */
269	RTDIRENTRYTYPE_FIFO = 001,
270	/** Character device (DT_CHR). */
271	RTDIRENTRYTYPE_DEV_CHAR = 002,
272	/** Directory (DT_DIR). */
273	RTDIRENTRYTYPE_DIRECTORY = 004,
274	/** Block device (DT_BLK). */
275	RTDIRENTRYTYPE_DEV_BLOCK = 006,
276	/** Regular file (DT_REG). */
277	RTDIRENTRYTYPE_FILE = 010,
278	/** Symbolic link (DT_LNK). */
279	RTDIRENTRYTYPE_SYMLINK = 012,
280	/** Socket (DT_SOCK). */
281	RTDIRENTRYTYPE_SOCKET = 014,
282	/** Whiteout (DT_WHT). */
283	RTDIRENTRYTYPE_WHITEOUT = 016
284	} RTDIRENTRYTYPE;
285
286
287	/**
288	* Directory entry.
289	*
290	* This is inspired by the POSIX interfaces.
291	*/
292	#pragma pack(1)
293	typedef struct RTDIRENTRY
294	{
295	/** The unique identifier (within the file system) of this file system object (d_ino).
296	*
297	* Together with INodeIdDevice, this field can be used as a OS wide unique id
298	* when both their values are not 0. This field is 0 if the information is not
299	* available. */
300	RTINODE INodeId;
301	/** The entry type. (d_type)
302	*
303	* @warning RTDIRENTRYTYPE_UNKNOWN is a common return value here since not all
304	* file systems (or Unixes) stores the type of a directory entry and
305	* instead expects the user to use stat() to get it. So, when you see
306	* this you should use RTDirQueryUnknownType or RTDirQueryUnknownTypeEx
307	* to get the type, or if if you're lazy, use RTDirReadEx.
308	*/
309	RTDIRENTRYTYPE enmType;
310	/** The length of the filename, excluding the terminating nul character. */
311	uint16_t cbName;
312	/** The filename. (no path)
313	* Using the pcbDirEntry parameter of RTDirRead makes this field variable in size. */
314	char szName[260];
315	} RTDIRENTRY;
316	#pragma pack()
317	/** Pointer to a directory entry. */
318	typedef RTDIRENTRY *PRTDIRENTRY;
319	/** Pointer to a const directory entry. */
320	typedef RTDIRENTRY const *PCRTDIRENTRY;
321
322
323	/**
324	* Directory entry with extended information.
325	*
326	* This is inspired by the PC interfaces.
327	*/
328	#pragma pack(1)
329	typedef struct RTDIRENTRYEX
330	{
331	/** Full information about the object. */
332	RTFSOBJINFO Info;
333	/** The length of the short field (number of RTUTF16 entries (not chars)).
334	* It is 16-bit for reasons of alignment. */
335	uint16_t cwcShortName;
336	/** The short name for 8.3 compatibility.
337	* Empty string if not available.
338	* Since the length is a bit tricky for a UTF-8 encoded name, and since this
339	* is practically speaking only a windows thing, it is encoded as UCS-2. */
340	RTUTF16 wszShortName[14];
341	/** The length of the filename. */
342	uint16_t cbName;
343	/** The filename. (no path)
344	* Using the pcbDirEntry parameter of RTDirReadEx makes this field variable in size. */
345	char szName[260];
346	} RTDIRENTRYEX;
347	#pragma pack()
348	/** Pointer to a directory entry. */
349	typedef RTDIRENTRYEX *PRTDIRENTRYEX;
350	/** Pointer to a const directory entry. */
351	typedef RTDIRENTRYEX const *PCRTDIRENTRYEX;
352
353
354	/**
355	* Opens a directory.
356	*
357	* @returns iprt status code.
358	* @param phDir Where to store the open directory handle.
359	* @param pszPath Path to the directory to open.
360	*/
361	RTDECL(int) RTDirOpen(RTDIR phDir, const char pszPath);
362
363	/** @name RTDIR_F_XXX - RTDirOpenFiltered flags.
364	* @{ */
365	/** Don't allow symbolic links as part of the path.
366	* @remarks this flag is currently not implemented and will be ignored. */
367	#define RTDIR_F_NO_SYMLINKS RT_BIT_32(0)
368	/** Deny relative opening of anything above this directory. */
369	#define RTDIR_F_DENY_ASCENT RT_BIT_32(1)
370	/** Don't follow symbolic links in the final component. */
371	#define RTDIR_F_NO_FOLLOW RT_BIT_32(2)
372	/** Long path hack: Don't apply RTPathAbs to the path. */
373	#define RTDIR_F_NO_ABS_PATH RT_BIT_32(3)
374	/** Valid flag mask. */
375	#define RTDIR_F_VALID_MASK UINT32_C(0x0000000f)
376	/** @} */
377
378	/**
379	* Opens a directory with flags and optional filtering.
380	*
381	* @returns IPRT status code.
382	* @retval VERR_IS_A_SYMLINK if RTDIR_F_NO_FOLLOW is set, @a enmFilter is
383	* RTDIRFILTER_NONE and @a pszPath points to a symbolic link and does
384	* not end with a slash. Note that on Windows this does not apply to
385	* file symlinks, only directory symlinks, for the file variant
386	* VERR_NOT_A_DIRECTORY will be returned.
387	*
388	* @param phDir Where to store the open directory handle.
389	* @param pszPath Path to the directory to search, this must include wildcards.
390	* @param enmFilter The kind of filter to apply. Setting this to RTDIRFILTER_NONE makes
391	* this function behave like RTDirOpen.
392	* @param fFlags Open flags, RTDIR_F_XXX.
393	*
394	*/
395	RTDECL(int) RTDirOpenFiltered(RTDIR phDir, const char pszPath, RTDIRFILTER enmFilter, uint32_t fFlags);
396
397	/**
398	* Closes a directory.
399	*
400	* @returns iprt status code.
401	* @param hDir Handle to open directory returned by RTDirOpen() or
402	* RTDirOpenFiltered().
403	*/
404	RTDECL(int) RTDirClose(RTDIR hDir);
405
406	/**
407	* Checks if the supplied directory handle is valid.
408	*
409	* @returns true if valid.
410	* @returns false if invalid.
411	* @param hDir The directory handle.
412	*/
413	RTDECL(bool) RTDirIsValid(RTDIR hDir);
414
415	/**
416	* Reads the next entry in the directory.
417	*
418	* @returns VINF_SUCCESS and data in pDirEntry on success.
419	* @returns VERR_NO_MORE_FILES when the end of the directory has been reached.
420	* @returns VERR_BUFFER_OVERFLOW if the buffer is too small to contain the filename. If
421	* pcbDirEntry is specified it will be updated with the required buffer size.
422	* @returns suitable iprt status code on other errors.
423	*
424	* @param hDir Handle to the open directory.
425	* @param pDirEntry Where to store the information about the next
426	* directory entry on success.
427	* @param pcbDirEntry Optional parameter used for variable buffer size.
428	*
429	* On input the variable pointed to contains the size of the pDirEntry
430	* structure. This must be at least OFFSET(RTDIRENTRY, szName[2]) bytes.
431	*
432	* On successful output the field is updated to
433	* OFFSET(RTDIRENTRY, szName[pDirEntry->cbName + 1]).
434	*
435	* When the data doesn't fit in the buffer and VERR_BUFFER_OVERFLOW is
436	* returned, this field contains the required buffer size.
437	*
438	* The value is unchanged in all other cases.
439	*/
440	RTDECL(int) RTDirRead(RTDIR hDir, PRTDIRENTRY pDirEntry, size_t *pcbDirEntry);
441
442	/**
443	* Reads the next entry in the directory returning extended information.
444	*
445	* @returns VINF_SUCCESS and data in pDirEntry on success.
446	* @returns VERR_NO_MORE_FILES when the end of the directory has been reached.
447	* @returns VERR_BUFFER_OVERFLOW if the buffer is too small to contain the filename. If
448	* pcbDirEntry is specified it will be updated with the required buffer size.
449	* @returns suitable iprt status code on other errors.
450	*
451	* @param hDir Handle to the open directory.
452	* @param pDirEntry Where to store the information about the next
453	* directory entry on success.
454	* @param pcbDirEntry Optional parameter used for variable buffer size.
455	*
456	* On input the variable pointed to contains the size of the pDirEntry
457	* structure. This must be at least OFFSET(RTDIRENTRYEX, szName[2]) bytes.
458	*
459	* On successful output the field is updated to
460	* OFFSET(RTDIRENTRYEX, szName[pDirEntry->cbName + 1]).
461	*
462	* When the data doesn't fit in the buffer and VERR_BUFFER_OVERFLOW is
463	* returned, this field contains the required buffer size.
464	*
465	* The value is unchanged in all other cases.
466	* @param enmAdditionalAttribs
467	* Which set of additional attributes to request.
468	* Use RTFSOBJATTRADD_NOTHING if this doesn't matter.
469	* @param fFlags RTPATH_F_ON_LINK or RTPATH_F_FOLLOW_LINK.
470	*/
471	RTDECL(int) RTDirReadEx(RTDIR hDir, PRTDIRENTRYEX pDirEntry, size_t *pcbDirEntry, RTFSOBJATTRADD enmAdditionalAttribs, uint32_t fFlags);
472
473	/**
474	* Wrapper around RTDirReadEx that does the directory entry buffer handling.
475	*
476	* Call RTDirReadExAFree to free the buffers allocated by this function.
477	*
478	* @returns IPRT status code, see RTDirReadEx() for details.
479	*
480	* @param hDir Handle to the open directory.
481	* @param ppDirEntry Pointer to the directory entry pointer. Initialize this
482	* to NULL before the first call.
483	* @param pcbDirEntry Where the API caches the allocation size. Set this to
484	* zero before the first call.
485	* @param enmAddAttr See RTDirReadEx.
486	* @param fFlags See RTDirReadEx.
487	*/
488	RTDECL(int) RTDirReadExA(RTDIR hDir, PRTDIRENTRYEX ppDirEntry, size_t pcbDirEntry, RTFSOBJATTRADD enmAddAttr, uint32_t fFlags);
489
490	/**
491	* Frees the buffer allocated by RTDirReadExA.
492	*
493	* @param ppDirEntry Pointer to the directory entry pointer.
494	* @param pcbDirEntry Where the API caches the allocation size.
495	*/
496	RTDECL(void) RTDirReadExAFree(PRTDIRENTRYEX ppDirEntry, size_t pcbDirEntry);
497
498	/**
499	* Resolves RTDIRENTRYTYPE_UNKNOWN values returned by RTDirRead.
500	*
501	* @returns IPRT status code (see RTPathQueryInfo).
502	* @param pszComposedName The path to the directory entry. The caller must
503	* compose this, it's NOT sufficient to pass
504	* RTDIRENTRY::szName!
505	* @param fFollowSymlinks Whether to follow symbolic links or not.
506	* @param penmType Pointer to the RTDIRENTRY::enmType member. If this
507	* is not RTDIRENTRYTYPE_UNKNOWN and, if
508	* @a fFollowSymlinks is false, not
509	* RTDIRENTRYTYPE_SYMLINK, the function will return
510	* immediately without doing anything. Otherwise it
511	* will use RTPathQueryInfo to try figure out the
512	* correct value. On failure, this will be unchanged.
513	*/
514	RTDECL(int) RTDirQueryUnknownType(const char pszComposedName, bool fFollowSymlinks, RTDIRENTRYTYPE penmType);
515
516	/**
517	* Resolves RTDIRENTRYTYPE_UNKNOWN values returned by RTDirRead, extended
518	* version.
519	*
520	* @returns IPRT status code (see RTPathQueryInfo).
521	* @param pszComposedName The path to the directory entry. The caller must
522	* compose this, it's NOT sufficient to pass
523	* RTDIRENTRY::szName!
524	* @param fFollowSymlinks Whether to follow symbolic links or not.
525	* @param penmType Pointer to the RTDIRENTRY::enmType member or
526	* similar. Will NOT be checked on input.
527	* @param pObjInfo The object info buffer to use with RTPathQueryInfo.
528	*/
529	RTDECL(int) RTDirQueryUnknownTypeEx(const char pszComposedName, bool fFollowSymlinks, RTDIRENTRYTYPE penmType, PRTFSOBJINFO pObjInfo);
530
531	/**
532	* Checks if the directory entry returned by RTDirRead is '.', '..' or similar.
533	*
534	* @returns true / false.
535	* @param pDirEntry The directory entry to check.
536	*/
537	RTDECL(bool) RTDirEntryIsStdDotLink(PRTDIRENTRY pDirEntry);
538
539	/**
540	* Checks if the directory entry returned by RTDirReadEx is '.', '..' or
541	* similar.
542	*
543	* @returns true / false.
544	* @param pDirEntryEx The extended directory entry to check.
545	*/
546	RTDECL(bool) RTDirEntryExIsStdDotLink(PCRTDIRENTRYEX pDirEntryEx);
547
548	/**
549	* Rewind and restart the directory reading.
550	*
551	* @returns IRPT status code.
552	* @param hDir The directory handle to rewind.
553	*/
554	RTDECL(int) RTDirRewind(RTDIR hDir);
555
556	/**
557	* Renames a file.
558	*
559	* Identical to RTPathRename except that it will ensure that the source is a directory.
560	*
561	* @returns IPRT status code.
562	* @returns VERR_ALREADY_EXISTS if the destination file exists.
563	*
564	* @param pszSrc The path to the source file.
565	* @param pszDst The path to the destination file.
566	* This file will be created.
567	* @param fRename See RTPathRename.
568	*/
569	RTDECL(int) RTDirRename(const char pszSrc, const char pszDst, unsigned fRename);
570
571
572	/**
573	* Query information about an open directory.
574	*
575	* @returns iprt status code.
576	*
577	* @param hDir Handle to the open directory.
578	* @param pObjInfo Object information structure to be filled on successful return.
579	* @param enmAdditionalAttribs Which set of additional attributes to request.
580	* Use RTFSOBJATTRADD_NOTHING if this doesn't matter.
581	*/
582	RTR3DECL(int) RTDirQueryInfo(RTDIR hDir, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAdditionalAttribs);
583
584
585	/**
586	* Changes one or more of the timestamps associated of file system object.
587	*
588	* @returns iprt status code.
589	* @returns VERR_NOT_SUPPORTED is returned if the operation isn't supported by the OS.
590	*
591	* @param hDir Handle to the open directory.
592	* @param pAccessTime Pointer to the new access time. NULL if not to be changed.
593	* @param pModificationTime Pointer to the new modifcation time. NULL if not to be changed.
594	* @param pChangeTime Pointer to the new change time. NULL if not to be changed.
595	* @param pBirthTime Pointer to the new time of birth. NULL if not to be changed.
596	*
597	* @remark The file system might not implement all these time attributes,
598	* the API will ignore the ones which aren't supported.
599	*
600	* @remark The file system might not implement the time resolution
601	* employed by this interface, the time will be chopped to fit.
602	*
603	* @remark The file system may update the change time even if it's
604	* not specified.
605	*
606	* @remark POSIX can only set Access & Modification and will always set both.
607	*/
608	RTR3DECL(int) RTDirSetTimes(RTDIR hDir, PCRTTIMESPEC pAccessTime, PCRTTIMESPEC pModificationTime,
609	PCRTTIMESPEC pChangeTime, PCRTTIMESPEC pBirthTime);
610
611
612	/**
613	* Changes the mode flags of an open directory.
614	*
615	* The API requires at least one of the mode flag sets (Unix/Dos) to
616	* be set. The type is ignored.
617	*
618	* @returns iprt status code.
619	* @param hDir Handle to the open directory.
620	* @param fMode The new file mode, see @ref grp_rt_fs for details.
621	*/
622	RTDECL(int) RTDirSetMode(RTDIR hDir, RTFMODE fMode);
623
624
625	/** @defgroup grp_rt_dir_rel Directory relative APIs
626	*
627	* This group of APIs allows working with paths that are relative to an open
628	* directory, therebye eliminating some classic path related race conditions on
629	* systems with native support for these kinds of operations.
630	*
631	* On NT (Windows) there is native support for addressing files, directories and
632	* stuff _below_ the open directory. It is not possible to go upwards
633	* (hDir:../../grandparent), at least not with NTFS, forcing us to use the
634	* directory path as a fallback and opening us to potential races.
635	*
636	* On most unix-like systems here is now native support for all of this.
637	*
638	* @{ */
639
640	/**
641	* Open a file relative to @a hDir.
642	*
643	* @returns IPRT status code.
644	* @param hDir The directory to open relative to.
645	* @param pszRelFilename The relative path to the file.
646	* @param fOpen Open flags, i.e a combination of the RTFILE_O_XXX
647	* defines. The ACCESS, ACTION and DENY flags are
648	* mandatory!
649	* @param phFile Where to store the handle to the opened file.
650	*
651	* @sa RTFileOpen
652	*/
653	RTDECL(int) RTDirRelFileOpen(RTDIR hDir, const char *pszRelFilename, uint64_t fOpen, PRTFILE phFile);
654
655
656
657	/**
658	* Opens a directory relative to @a hDir.
659	*
660	* @returns IPRT status code.
661	* @param hDir The directory to open relative to.
662	* @param pszDir The relative path to the directory to open.
663	* @param phDir Where to store the directory handle.
664	*
665	* @sa RTDirOpen
666	*/
667	RTDECL(int) RTDirRelDirOpen(RTDIR hDir, const char pszDir, RTDIR phDir);
668
669	/**
670	* Opens a directory relative to @a hDir, with flags and optional filtering.
671	*
672	* @returns IPRT status code.
673	* @retval VERR_IS_A_SYMLINK if RTDIR_F_NO_FOLLOW is set, @a enmFilter is
674	* RTDIRFILTER_NONE and @a pszPath points to a symbolic link and does
675	* not end with a slash. Note that on Windows this does not apply to
676	* file symlinks, only directory symlinks, for the file variant
677	* VERR_NOT_A_DIRECTORY will be returned.
678	*
679	* @param hDir The directory to open relative to.
680	* @param pszDirAndFilter The relative path to the directory to search, this
681	* must include wildcards.
682	* @param enmFilter The kind of filter to apply. Setting this to
683	* RTDIRFILTER_NONE makes this function behave like
684	* RTDirOpen.
685	* @param fFlags Open flags, RTDIR_F_XXX.
686	* @param phDir Where to store the directory handle.
687	*
688	* @sa RTDirOpenFiltered
689	*/
690	RTDECL(int) RTDirRelDirOpenFiltered(RTDIR hDir, const char *pszDirAndFilter, RTDIRFILTER enmFilter,
691	uint32_t fFlags, RTDIR *phDir);
692
693	/**
694	* Creates a directory relative to @a hDir.
695	*
696	* @returns IPRT status code.
697	* @param hDir The directory @a pszRelPath is relative to.
698	* @param pszRelPath The relative path to the directory to create.
699	* @param fMode The mode of the new directory.
700	* @param fCreate Create flags, RTDIRCREATE_FLAGS_XXX.
701	* @param phSubDir Where to return the handle of the created directory.
702	* Optional.
703	*
704	* @sa RTDirCreate
705	*/
706	RTDECL(int) RTDirRelDirCreate(RTDIR hDir, const char pszRelPath, RTFMODE fMode, uint32_t fCreate, RTDIR phSubDir);
707
708	/**
709	* Removes a directory relative to @a hDir if empty.
710	*
711	* @returns IPRT status code.
712	* @param hDir The directory @a pszRelPath is relative to.
713	* @param pszRelPath The relative path to the directory to remove.
714	*
715	* @sa RTDirRemove
716	*/
717	RTDECL(int) RTDirRelDirRemove(RTDIR hDir, const char *pszRelPath);
718
719
720	/**
721	* Query information about a file system object relative to @a hDir.
722	*
723	* @returns IPRT status code.
724	* @retval VINF_SUCCESS if the object exists, information returned.
725	* @retval VERR_PATH_NOT_FOUND if any but the last component in the specified
726	* path was not found or was not a directory.
727	* @retval VERR_FILE_NOT_FOUND if the object does not exist (but path to the
728	* parent directory exists).
729	*
730	* @param hDir The directory @a pszRelPath is relative to.
731	* @param pszRelPath The relative path to the file system object.
732	* @param pObjInfo Object information structure to be filled on successful
733	* return.
734	* @param enmAddAttr Which set of additional attributes to request.
735	* Use RTFSOBJATTRADD_NOTHING if this doesn't matter.
736	* @param fFlags RTPATH_F_ON_LINK or RTPATH_F_FOLLOW_LINK.
737	*
738	* @sa RTPathQueryInfoEx
739	*/
740	RTDECL(int) RTDirRelPathQueryInfo(RTDIR hDir, const char *pszRelPath, PRTFSOBJINFO pObjInfo,
741	RTFSOBJATTRADD enmAddAttr, uint32_t fFlags);
742
743	/**
744	* Changes the mode flags of a file system object relative to @a hDir.
745	*
746	* The API requires at least one of the mode flag sets (Unix/Dos) to
747	* be set. The type is ignored.
748	*
749	* @returns IPRT status code.
750	* @param hDir The directory @a pszRelPath is relative to.
751	* @param pszRelPath The relative path to the file system object.
752	* @param fMode The new file mode, see @ref grp_rt_fs for details.
753	* @param fFlags RTPATH_F_ON_LINK or RTPATH_F_FOLLOW_LINK.
754	*
755	* @sa RTPathSetMode
756	*/
757	RTDECL(int) RTDirRelPathSetMode(RTDIR hDir, const char *pszRelPath, RTFMODE fMode, uint32_t fFlags);
758
759	/**
760	* Changes one or more of the timestamps associated of file system object
761	* relative to @a hDir.
762	*
763	* @returns IPRT status code.
764	* @param hDir The directory @a pszRelPath is relative to.
765	* @param pszRelPath The relative path to the file system object.
766	* @param pAccessTime Pointer to the new access time.
767	* @param pModificationTime Pointer to the new modification time.
768	* @param pChangeTime Pointer to the new change time. NULL if not to be changed.
769	* @param pBirthTime Pointer to the new time of birth. NULL if not to be changed.
770	* @param fFlags RTPATH_F_ON_LINK or RTPATH_F_FOLLOW_LINK.
771	*
772	* @remark The file system might not implement all these time attributes,
773	* the API will ignore the ones which aren't supported.
774	*
775	* @remark The file system might not implement the time resolution
776	* employed by this interface, the time will be chopped to fit.
777	*
778	* @remark The file system may update the change time even if it's
779	* not specified.
780	*
781	* @remark POSIX can only set Access & Modification and will always set both.
782	*
783	* @sa RTPathSetTimesEx
784	*/
785	RTDECL(int) RTDirRelPathSetTimes(RTDIR hDir, const char *pszRelPath, PCRTTIMESPEC pAccessTime, PCRTTIMESPEC pModificationTime,
786	PCRTTIMESPEC pChangeTime, PCRTTIMESPEC pBirthTime, uint32_t fFlags);
787
788	/**
789	* Changes the owner and/or group of a file system object relative to @a hDir.
790	*
791	* @returns IPRT status code.
792	* @param hDir The directory @a pszRelPath is relative to.
793	* @param pszRelPath The relative path to the file system object.
794	* @param uid The new file owner user id. Pass NIL_RTUID to leave
795	* this unchanged.
796	* @param gid The new group id. Pass NIL_RTGID to leave this
797	* unchanged.
798	* @param fFlags RTPATH_F_ON_LINK or RTPATH_F_FOLLOW_LINK.
799	*
800	* @sa RTPathSetOwnerEx
801	*/
802	RTDECL(int) RTDirRelPathSetOwner(RTDIR hDir, const char *pszRelPath, uint32_t uid, uint32_t gid, uint32_t fFlags);
803
804	/**
805	* Renames a directory relative path within a filesystem.
806	*
807	* This will rename symbolic links. If RTPATHRENAME_FLAGS_REPLACE is used and
808	* pszDst is a symbolic link, it will be replaced and not its target.
809	*
810	* @returns IPRT status code.
811	* @param hDirSrc The directory the source path is relative to.
812	* @param pszSrc The source path, relative to @a hDirSrc.
813	* @param hDirDst The directory the destination path is relative to.
814	* @param pszDst The destination path, relative to @a hDirDst.
815	* @param fRename Rename flags, RTPATHRENAME_FLAGS_XXX.
816	*
817	* @sa RTPathRename
818	*/
819	RTDECL(int) RTDirRelPathRename(RTDIR hDirSrc, const char pszSrc, RTDIR hDirDst, const char pszDst, unsigned fRename);
820
821	/**
822	* Removes the last component of the directory relative path.
823	*
824	* @returns IPRT status code.
825	* @param hDir The directory @a pszRelPath is relative to.
826	* @param pszRelPath The relative path to the file system object.
827	* @param fUnlink Unlink flags, RTPATHUNLINK_FLAGS_XXX.
828	*
829	* @sa RTPathUnlink
830	*/
831	RTDECL(int) RTDirRelPathUnlink(RTDIR hDir, const char *pszRelPath, uint32_t fUnlink);
832
833
834
835	/**
836	* Creates a symbolic link (@a pszSymlink) relative to @a hDir targeting @a
837	* pszTarget.
838	*
839	* @returns IPRT status code.
840	* @param hDir The directory @a pszSymlink is relative to.
841	* @param pszSymlink The relative path of the symbolic link.
842	* @param pszTarget The path to the symbolic link target. This is
843	* relative to @a pszSymlink or an absolute path.
844	* @param enmType The symbolic link type. For Windows compatability
845	* it is very important to set this correctly. When
846	* RTSYMLINKTYPE_UNKNOWN is used, the API will try
847	* make a guess and may attempt query information
848	* about @a pszTarget in the process.
849	* @param fCreate Create flags, RTSYMLINKCREATE_FLAGS_XXX.
850	*
851	* @sa RTSymlinkCreate
852	*/
853	RTDECL(int) RTDirRelSymlinkCreate(RTDIR hDir, const char pszSymlink, const char pszTarget,
854	RTSYMLINKTYPE enmType, uint32_t fCreate);
855
856	/**
857	* Read the symlink target relative to @a hDir.
858	*
859	* @returns IPRT status code.
860	* @retval VERR_NOT_SYMLINK if @a pszSymlink does not specify a symbolic link.
861	* @retval VERR_BUFFER_OVERFLOW if the link is larger than @a cbTarget. The
862	* buffer will contain what all we managed to read, fully terminated
863	* if @a cbTarget > 0.
864	*
865	* @param hDir The directory @a pszSymlink is relative to.
866	* @param pszSymlink The relative path to the symbolic link that should
867	* be read.
868	* @param pszTarget The target buffer.
869	* @param cbTarget The size of the target buffer.
870	* @param fRead Read flags, RTSYMLINKREAD_FLAGS_XXX.
871	*
872	* @sa RTSymlinkRead
873	*/
874	RTDECL(int) RTDirRelSymlinkRead(RTDIR hDir, const char pszSymlink, char pszTarget, size_t cbTarget, uint32_t fRead);
875
876	/** @} */
877
878
879	/** @} */
880
881	RT_C_DECLS_END
882
883	#endif /* !IPRT_INCLUDED_dir_h */
884

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