vfs.h@ 94311

Last change on this file since 94311 was 94291, checked in by vboxsync, 3 years ago
IPRT,Storage: Adding RTVfsQueryLabel and internally a generic pfnQueryInfoEx method to the RTVFSOBJOPS function table. Untested implementation of the latter for iso/udf. bugref:9781
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 80.8 KB

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1	/** @file
2	* IPRT - Virtual Filesystem.
3	*/
4
5	/*
6	* Copyright (C) 2010-2022 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_vfs_h
27	#define IPRT_INCLUDED_vfs_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/dir.h>
35	#include <iprt/fs.h>
36	#include <iprt/handle.h>
37	#include <iprt/symlink.h>
38	#include <iprt/sg.h>
39	#include <iprt/time.h>
40
41
42	RT_C_DECLS_BEGIN
43
44	/** @defgroup grp_rt_vfs RTVfs - Virtual Filesystem
45	* @ingroup grp_rt
46	*
47	* The virtual filesystem APIs are intended to make it possible to work on
48	* container files, file system sub-trees, file system overlays and other custom
49	* filesystem configurations. It also makes it possible to create filters, like
50	* automatically gunzipping a tar.gz file before feeding it to the RTTar API for
51	* unpacking - or vice versa.
52	*
53	* The virtual filesystem APIs are intended to mirror the RTDir, RTFile, RTPath
54	* and RTFs APIs pretty closely so that rewriting a piece of code to work with
55	* it should be easy. However there are some differences to the way the APIs
56	* works and the user should heed the documentation. The differences are
57	* usually motivated by simplification and in some case to make the VFS more
58	* flexible.
59	*
60	* @{
61	*/
62
63	/**
64	* The object type.
65	*/
66	typedef enum RTVFSOBJTYPE
67	{
68	/** Invalid type. */
69	RTVFSOBJTYPE_INVALID = 0,
70	/** Pure base object.
71	* This is returned by the filesystem stream to represent directories,
72	* devices, fifos and similar that needs to be created. */
73	RTVFSOBJTYPE_BASE,
74	/** Virtual filesystem. */
75	RTVFSOBJTYPE_VFS,
76	/** Filesystem stream. */
77	RTVFSOBJTYPE_FS_STREAM,
78	/** Pure I/O stream. */
79	RTVFSOBJTYPE_IO_STREAM,
80	/** Directory. */
81	RTVFSOBJTYPE_DIR,
82	/** File. */
83	RTVFSOBJTYPE_FILE,
84	/** Symbolic link. */
85	RTVFSOBJTYPE_SYMLINK,
86	/** End of valid object types. */
87	RTVFSOBJTYPE_END,
88	/** Pure I/O stream. */
89	RTVFSOBJTYPE_32BIT_HACK = 0x7fffffff
90	} RTVFSOBJTYPE;
91	/** Pointer to a VFS object type. */
92	typedef RTVFSOBJTYPE *PRTVFSOBJTYPE;
93
94	/**
95	* Translates a RTVFSOBJTYPE value into a string.
96	*
97	* @returns Pointer to readonly name.
98	* @param enmType The object type to name.
99	*/
100	RTDECL(const char *) RTVfsTypeName(RTVFSOBJTYPE enmType);
101
102
103
104	/** @name RTVfsCreate flags
105	* @{ */
106	/** Whether the file system is read-only. */
107	#define RTVFS_C_READONLY RT_BIT(0)
108	/** Whether we the VFS should be thread safe (i.e. automaticaly employ
109	* locks). */
110	#define RTVFS_C_THREAD_SAFE RT_BIT(1)
111	/** @} */
112
113	/**
114	* Creates an empty virtual filesystem.
115	*
116	* @returns IPRT status code.
117	* @param pszName Name, for logging and such.
118	* @param fFlags Flags, MBZ.
119	* @param phVfs Where to return the VFS handle. Release the returned
120	* reference by calling RTVfsRelease.
121	*/
122	RTDECL(int) RTVfsCreate(const char *pszName, uint32_t fFlags, PRTVFS phVfs);
123	RTDECL(uint32_t) RTVfsRetain(RTVFS hVfs);
124	RTDECL(uint32_t) RTVfsRetainDebug(RTVFS hVfs, RT_SRC_POS_DECL);
125	RTDECL(uint32_t) RTVfsRelease(RTVFS hVfs);
126
127	/** @name RTVFSMNT_F_XXX - Flags for RTVfsMount
128	* @{ */
129	/** Mount read-only. */
130	#define RTVFSMNT_F_READ_ONLY RT_BIT_32(0)
131	/** Purpose is . */
132	#define RTVFSMNT_F_FOR_RANGE_IN_USE RT_BIT_32(1)
133	/** Valid mask. */
134	#define RTVFSMNT_F_VALID_MASK UINT32_C(0x00000003)
135	/** @} */
136
137	/**
138	* Does the file system detection and mounting.
139	*
140	* @returns IPRT status code.
141	* @retval VERR_VFS_UNSUPPORTED_FORMAT if not recognized as a support file
142	* system.
143	* @param hVfsFileIn The file handle of the volume.
144	* @param fFlags RTVFSMTN_F_XXX.
145	* @param phVfs Where to return the VFS handle on success.
146	* @param pErrInfo Where to return additional error information.
147	* Optional.
148	*/
149	RTDECL(int) RTVfsMountVol(RTVFSFILE hVfsFileIn, uint32_t fFlags, PRTVFS phVfs, PRTERRINFO pErrInfo);
150
151	RTDECL(int) RTVfsAttach(RTVFS hVfs, const char *pszMountPoint, uint32_t fFlags, RTVFS hVfsAttach);
152	RTDECL(int) RTVfsDetach(RTVFS hVfs, const char pszMountPoint, RTVFS hVfsToDetach, PRTVFS phVfsDetached);
153	RTDECL(uint32_t) RTVfsGetAttachmentCount(RTVFS hVfs);
154	RTDECL(int) RTVfsGetAttachment(RTVFS hVfs, uint32_t iOrdinal, PRTVFS phVfsAttached, uint32_t pfFlags,
155	char *pszMountPoint, size_t cbMountPoint);
156
157	/**
158	* Opens the root director of the given VFS.
159	*
160	* @returns IPRT status code.
161	* @param hVfs VFS handle.
162	* @param phDir Where to return the root directory handle.
163	*/
164	RTDECL(int) RTVfsOpenRoot(RTVFS hVfs, PRTVFSDIR phDir);
165
166	/**
167	* Queries information about a object in the virtual filesystem.
168	*
169	* @returns IPRT Status code.
170	* @param hVfs VFS handle.
171	* @param pszPath Path to the object, relative to the VFS root.
172	* @param pObjInfo Where to return info.
173	* @param enmAddAttr What to return.
174	* @param fFlags RTPATH_F_XXX.
175	* @sa RTPathQueryInfoEx, RTVfsDirQueryPathInfo, RTVfsObjQueryInfo
176	*/
177	RTDECL(int) RTVfsQueryPathInfo(RTVFS hVfs, const char *pszPath, PRTFSOBJINFO pObjInfo,
178	RTFSOBJATTRADD enmAddAttr, uint32_t fFlags);
179
180	/**
181	* Checks whether a given range is in use by the virtual filesystem.
182	*
183	* @returns IPRT status code.
184	* @param hVfs VFS handle.
185	* @param off Start offset to check.
186	* @param cb Number of bytes to check.
187	* @param pfUsed Where to store the result.
188	*/
189	RTDECL(int) RTVfsQueryRangeState(RTVFS hVfs, uint64_t off, size_t cb, bool *pfUsed);
190
191	/**
192	* Queries the volume label.
193	*
194	* @returns IPRT status code.
195	* @param hVfs VFS handle.
196	* @param pszLabel Where to store the lable.
197	* @param cbLabel Size of the buffer @a pszLable points at.
198	* @param pcbActual Where to return the label length, including the
199	* terminator. In case of VERR_BUFFER_OVERFLOW returns,
200	* this will be set to the required buffer size. Optional.
201	*/
202	RTDECL(int) RTVfsQueryLabel(RTVFS hVfs, char pszLabel, size_t cbLabel, size_t pcbActual);
203
204
205	/** @defgroup grp_rt_vfs_obj VFS Base Object API
206	* @{
207	*/
208
209	/**
210	* Retains a reference to the VFS base object handle.
211	*
212	* @returns New reference count on success, UINT32_MAX on failure.
213	* @param hVfsObj The VFS base object handle.
214	*/
215	RTDECL(uint32_t) RTVfsObjRetain(RTVFSOBJ hVfsObj);
216	RTDECL(uint32_t) RTVfsObjRetainDebug(RTVFSOBJ hVfsObj, RT_SRC_POS_DECL);
217
218	/**
219	* Releases a reference to the VFS base handle.
220	*
221	* @returns New reference count on success (0 if closed), UINT32_MAX on failure.
222	* @param hVfsObj The VFS base object handle.
223	*/
224	RTDECL(uint32_t) RTVfsObjRelease(RTVFSOBJ hVfsObj);
225
226	/** @name RTVFSOBJ_F_XXX - Flags or RTVfsObjOpen and RTVfsDirOpenObj.
227	* @note Must leave space for RTPATH_F_XXX.
228	* @{ */
229	/** Directory (RTFS_TYPE_DIRECTORY). */
230	#define RTVFSOBJ_F_OPEN_DIRECTORY RT_BIT_32(8)
231	/** Symbolic link (RTFS_TYPE_SYMLINK). */
232	#define RTVFSOBJ_F_OPEN_SYMLINK RT_BIT_32(9)
233	/** Regular file (RTFS_TYPE_FILE). */
234	#define RTVFSOBJ_F_OPEN_FILE RT_BIT_32(10)
235	/** Character device (RTFS_TYPE_DEV_CHAR). */
236	#define RTVFSOBJ_F_OPEN_DEV_CHAR RT_BIT_32(11)
237	/** Block device (RTFS_TYPE_DEV_BLOCK). */
238	#define RTVFSOBJ_F_OPEN_DEV_BLOCK RT_BIT_32(12)
239	/** Named pipe (fifo) (RTFS_TYPE_FIFO). */
240	#define RTVFSOBJ_F_OPEN_FIFO RT_BIT_32(13)
241	/** Socket (RTFS_TYPE_SOCKET). */
242	#define RTVFSOBJ_F_OPEN_SOCKET RT_BIT_32(14)
243	/** Mounted VFS. */
244	#define RTVFSOBJ_F_OPEN_MOUNT RT_BIT_32(15)
245	/** Mask object types we wish to open. */
246	#define RTVFSOBJ_F_OPEN_MASK UINT32_C(0x0000ff00)
247	/** Any kind of object that translates to RTVFSOBJTYPE_FILE. */
248	#define RTVFSOBJ_F_OPEN_ANY_FILE (RTVFSOBJ_F_OPEN_FILE \| RTVFSOBJ_F_OPEN_DEV_BLOCK)
249	/** Any kind of object that translates to RTVFSOBJTYPE_IOS or
250	* RTVFSOBJTYPE_FILE. */
251	#define RTVFSOBJ_F_OPEN_ANY_IO_STREAM ( RTVFSOBJ_F_ANY_OPEN_FILE \| RTVFSOBJ_F_DEV_OPEN_BLOCK \
252	\| RTVFSOBJ_F_OPEN_FIFO \| RTVFSOBJ_F_OPEN_SOCKET)
253	/** Any kind of object. */
254	#define RTVFSOBJ_F_OPEN_ANY RTVFSOBJ_F_OPEN_MASK
255
256	/** Do't create anything, return file not found. */
257	#define RTVFSOBJ_F_CREATE_NOTHING UINT32_C(0x00000000)
258	/** Create a file if the if the object was not found and the RTFILE_O_XXX
259	* flags allows it. */
260	#define RTVFSOBJ_F_CREATE_FILE UINT32_C(0x00010000)
261	/** Create a directory if the object was not found and the RTFILE_O_XXX
262	* flags allows it. */
263	#define RTVFSOBJ_F_CREATE_DIRECTORY UINT32_C(0x00020000)
264	/** The creation type mask. */
265	#define RTVFSOBJ_F_CREATE_MASK UINT32_C(0x00070000)
266
267	/** Indicate that this call is for traversal.
268	* @internal only */
269	#define RTVFSOBJ_F_TRAVERSAL RT_BIT_32(31)
270	/** Valid mask for external callers. */
271	#define RTVFSOBJ_F_VALID_MASK UINT32_C(0x0007ff00)
272	/** @} */
273
274	/**
275	* Opens any file system object in the given VFS.
276	*
277	* @returns IPRT status code.
278	* @param hVfs The VFS to open the object within.
279	* @param pszPath Path to the file.
280	* @param fFileOpen RTFILE_O_XXX flags.
281	* @param fObjFlags More flags: RTVFSOBJ_F_XXX, RTPATH_F_XXX.
282	* @param phVfsObj Where to return the object handle.
283	* @sa RTVfsDirOpenObj, RTVfsDirOpenDir, RTVfsDirOpenFile
284	*/
285	RTDECL(int) RTVfsObjOpen(RTVFS hVfs, const char *pszPath, uint64_t fFileOpen, uint32_t fObjFlags, PRTVFSOBJ phVfsObj);
286
287	/**
288	* Query information about the object.
289	*
290	* @returns IPRT status code.
291	* @retval VERR_NOT_SUPPORTED if the @a enmAddAttr value is not handled by the
292	* implementation.
293	*
294	* @param hVfsObj The VFS object handle.
295	* @param pObjInfo Where to return the info.
296	* @param enmAddAttr Which additional attributes should be retrieved.
297	* @sa RTVfsIoStrmQueryInfo, RTVfsFileQueryInfo, RTFileQueryInfo,
298	* RTPathQueryInfo
299	*/
300	RTDECL(int) RTVfsObjQueryInfo(RTVFSOBJ hVfsObj, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr);
301
302	/**
303	* Sets the file mode for the given VFS object.
304	*
305	* @returns IPRT status code.
306	* @retval VERR_INVALID_FUNCTION if the object type has no file mode to set.
307	* Only directories, files and symbolic links support this operation.
308	*
309	* @param hVfsObj The VFS object handle.
310	* @param fMode The mode mask.
311	* @param fMask The bits in the mode mask which should be changed.
312	*/
313	RTDECL(int) RTVfsObjSetMode(RTVFSOBJ hVfsObj, RTFMODE fMode, RTFMODE fMask);
314
315	/**
316	* Sets one or more timestamps for the given VFS object.
317	*
318	* @returns IPRT status code.
319	* @retval VERR_INVALID_FUNCTION if the object type has no file mode to set.
320	* Only directories, files and symbolic links support this operation.
321	*
322	* @param hVfsObj The VFS object handle.
323	* @param pAccessTime Pointer to the new access time. NULL if not to
324	* be changed.
325	* @param pModificationTime Pointer to the new modifcation time. NULL if not
326	* to be changed.
327	* @param pChangeTime Pointer to the new change time. NULL if not to
328	* be changed.
329	* @param pBirthTime Pointer to the new time of birth. NULL if not to
330	* be changed.
331	*
332	* @remarks See RTFileSetTimes for restrictions and behavior imposed by the
333	* host OS or underlying VFS provider.
334	* @sa RTFileSetTimes, RTPathSetTimes
335	*/
336	RTDECL(int) RTVfsObjSetTimes(RTVFSOBJ hVfsObj, PCRTTIMESPEC pAccessTime, PCRTTIMESPEC pModificationTime,
337	PCRTTIMESPEC pChangeTime, PCRTTIMESPEC pBirthTime);
338
339	/**
340	* Set the unix style owner and group on the given VFS object.
341	*
342	* @returns IPRT status code.
343	* @retval VERR_INVALID_FUNCTION if the object type has no file mode to set.
344	* Only directories, files and symbolic links support this operation.
345	*
346	* @param hVfsObj The VFS object handle.
347	* @param uid The user ID of the new owner. NIL_RTUID if
348	* unchanged.
349	* @param gid The group ID of the new owner group. NIL_RTGID if
350	* unchanged.
351	*
352	* @sa RTFileSetOwner, RTPathSetOwner.
353	*/
354	RTDECL(int) RTVfsObjSetOwner(RTVFSOBJ hVfsObj, RTUID uid, RTGID gid);
355
356
357	/**
358	* Gets the type of a VFS object.
359	*
360	* @returns The VFS object type on success, RTVFSOBJTYPE_INVALID on failure.
361	* @param hVfsObj The VFS base object handle.
362	*/
363	RTDECL(RTVFSOBJTYPE) RTVfsObjGetType(RTVFSOBJ hVfsObj);
364
365	/**
366	* Converts a VFS base object handle to a VFS handle.
367	*
368	* @returns Referenced handle on success, NIL on failure.
369	* @param hVfsObj The VFS base object handle.
370	*/
371	RTDECL(RTVFS) RTVfsObjToVfs(RTVFSOBJ hVfsObj);
372
373	/**
374	* Converts a VFS base object handle to a VFS filesystem stream handle.
375	*
376	* @returns Referenced handle on success, NIL on failure.
377	* @param hVfsObj The VFS base object handle.
378	*/
379	RTDECL(RTVFSFSSTREAM) RTVfsObjToFsStream(RTVFSOBJ hVfsObj);
380
381	/**
382	* Converts a VFS base object handle to a VFS directory handle.
383	*
384	* @returns Referenced handle on success, NIL on failure.
385	* @param hVfsObj The VFS base object handle.
386	*/
387	RTDECL(RTVFSDIR) RTVfsObjToDir(RTVFSOBJ hVfsObj);
388
389	/**
390	* Converts a VFS base object handle to a VFS I/O stream handle.
391	*
392	* @returns Referenced handle on success, NIL on failure.
393	* @param hVfsObj The VFS base object handle.
394	*/
395	RTDECL(RTVFSIOSTREAM) RTVfsObjToIoStream(RTVFSOBJ hVfsObj);
396
397	/**
398	* Converts a VFS base object handle to a VFS file handle.
399	*
400	* @returns Referenced handle on success, NIL on failure.
401	* @param hVfsObj The VFS base object handle.
402	*/
403	RTDECL(RTVFSFILE) RTVfsObjToFile(RTVFSOBJ hVfsObj);
404
405	/**
406	* Converts a VFS base object handle to a VFS symbolic link handle.
407	*
408	* @returns Referenced handle on success, NIL on failure.
409	* @param hVfsObj The VFS base object handle.
410	*/
411	RTDECL(RTVFSSYMLINK) RTVfsObjToSymlink(RTVFSOBJ hVfsObj);
412
413
414	/**
415	* Converts a VFS handle to a VFS base object handle.
416	*
417	* @returns Referenced handle on success, NIL if the input handle was invalid.
418	* @param hVfs The VFS handle.
419	*/
420	RTDECL(RTVFSOBJ) RTVfsObjFromVfs(RTVFS hVfs);
421
422	/**
423	* Converts a VFS filesystem stream handle to a VFS base object handle.
424	*
425	* @returns Referenced handle on success, NIL if the input handle was invalid.
426	* @param hVfsFss The VFS filesystem stream handle.
427	*/
428	RTDECL(RTVFSOBJ) RTVfsObjFromFsStream(RTVFSFSSTREAM hVfsFss);
429
430	/**
431	* Converts a VFS directory handle to a VFS base object handle.
432	*
433	* @returns Referenced handle on success, NIL if the input handle was invalid.
434	* @param hVfsDir The VFS directory handle.
435	*/
436	RTDECL(RTVFSOBJ) RTVfsObjFromDir(RTVFSDIR hVfsDir);
437
438	/**
439	* Converts a VFS I/O stream handle to a VFS base object handle.
440	*
441	* @returns Referenced handle on success, NIL if the input handle was invalid.
442	* @param hVfsIos The VFS I/O stream handle.
443	*/
444	RTDECL(RTVFSOBJ) RTVfsObjFromIoStream(RTVFSIOSTREAM hVfsIos);
445
446	/**
447	* Converts a VFS file handle to a VFS base object handle.
448	*
449	* @returns Referenced handle on success, NIL if the input handle was invalid.
450	* @param hVfsFile The VFS file handle.
451	*/
452	RTDECL(RTVFSOBJ) RTVfsObjFromFile(RTVFSFILE hVfsFile);
453
454	/**
455	* Converts a VFS symbolic link handle to a VFS base object handle.
456	*
457	* @returns Referenced handle on success, NIL if the input handle was invalid.
458	* @param hVfsSym The VFS symbolic link handle.
459	*/
460	RTDECL(RTVFSOBJ) RTVfsObjFromSymlink(RTVFSSYMLINK hVfsSym);
461
462	/** @} */
463
464
465	/** @defgroup grp_rt_vfs_fsstream VFS Filesystem Stream API
466	*
467	* Filesystem streams are for tar, cpio and similar. Any virtual filesystem can
468	* be turned into a filesystem stream using RTVfsFsStrmFromVfs.
469	*
470	* @{
471	*/
472
473	RTDECL(uint32_t) RTVfsFsStrmRetain(RTVFSFSSTREAM hVfsFss);
474	RTDECL(uint32_t) RTVfsFsStrmRetainDebug(RTVFSFSSTREAM hVfsFss, RT_SRC_POS_DECL);
475	RTDECL(uint32_t) RTVfsFsStrmRelease(RTVFSFSSTREAM hVfsFss);
476	RTDECL(int) RTVfsFsStrmQueryInfo(RTVFSFSSTREAM hVfsFss, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr);
477
478	/**
479	* Gets the next object in the stream.
480	*
481	* This call may affect the stream posision of a previously returned object.
482	*
483	* The type of object returned here typically boils down to three types:
484	* - I/O streams (representing files),
485	* - symbolic links
486	* - base object
487	* The base objects represent anything not convered by the two other, i.e.
488	* directories, device nodes, fifos, sockets and whatnot. The details can be
489	* queried using RTVfsObjQueryInfo.
490	*
491	* That said, absolutely any object except for filesystem stream objects can be
492	* returned by this call. Any generic code is adviced to just deal with it all.
493	*
494	* @returns IPRT status code.
495	* @retval VINF_SUCCESS if a new object was retrieved.
496	* @retval VERR_EOF when there are no more objects.
497	* @retval VERR_INVALID_FUNCTION if called on a non-readable stream.
498	*
499	* @param hVfsFss The file system stream handle.
500	* @param ppszName Where to return the object name. Must be freed by
501	* calling RTStrFree.
502	* @param penmType Where to return the object type.
503	* @param phVfsObj Where to return the object handle (referenced). This
504	* must be cast to the desired type before use.
505	*/
506	RTDECL(int) RTVfsFsStrmNext(RTVFSFSSTREAM hVfsFss, char *ppszName, RTVFSOBJTYPE penmType, PRTVFSOBJ phVfsObj);
507
508	/**
509	* Appends a VFS object to the stream.
510	*
511	* The stream must be writable.
512	*
513	* @returns IPRT status code.
514	* @retval VERR_INVALID_FUNCTION if called on a non-writable stream.
515	* @param hVfsFss The file system stream handle.
516	* @param pszPath The path.
517	* @param hVfsObj The VFS object to add.
518	* @param fFlags RTVFSFSSTRM_ADD_F_XXX.
519	*/
520	RTDECL(int) RTVfsFsStrmAdd(RTVFSFSSTREAM hVfsFss, const char *pszPath, RTVFSOBJ hVfsObj, uint32_t fFlags);
521
522	/** @name RTVFSFSSTRM_ADD_F_XXX - Flags for RTVfsFsStrmAdd.
523	* @{ */
524	/** Input is an I/O stream of indeterminate length, read to the end and then
525	* update the file header.
526	* @note This is only possible if the output stream is actually a file. */
527	#define RTVFSFSSTRM_ADD_F_STREAM RT_BIT_32(0)
528	/** Mask of flags specific to the target stream. */
529	#define RTVFSFSSTRM_ADD_F_SPECIFIC_MASK UINT32_C(0xff000000)
530	/** Valid bits. */
531	#define RTVFSFSSTRM_ADD_F_VALID_MASK UINT32_C(0xff000001)
532	/** @} */
533
534	/**
535	* Pushes an byte stream onto the stream.
536	*
537	* The stream must be writable.
538	*
539	* This differs from RTVfsFsStrmAdd() in that it will create a regular file in
540	* the output file system stream and provide the actual content bytes via the
541	* returned I/O stream object.
542	*
543	* @returns IPRT status code.
544	* @retval VERR_INVALID_FUNCTION if called on a non-writable stream.
545	* @param hVfsFss The file system stream handle.
546	* @param pszPath The path to the file.
547	* @param cbFile The file size. This can also be set to UINT64_MAX if
548	* the file system stream is backed by a file.
549	* @param paObjInfo Array of zero or more RTFSOBJINFO structures containing
550	* different pieces of information about the file. If any
551	* provided, the first one should be a RTFSOBJATTRADD_UNIX
552	* one, additional can be supplied if wanted. What exactly
553	* is needed depends on the underlying FS stream
554	* implementation.
555	* @param cObjInfo Number of items in the array @a paObjInfo points at.
556	* @param fFlags RTVFSFSSTRM_PUSH_F_XXX.
557	* @param phVfsIos Where to return the I/O stream to feed the file content
558	* to. If the FS stream is backed by a file, the returned
559	* handle can be cast to a file if necessary.
560	*/
561	RTDECL(int) RTVfsFsStrmPushFile(RTVFSFSSTREAM hVfsFss, const char *pszPath, uint64_t cbFile,
562	PCRTFSOBJINFO paObjInfo, uint32_t cObjInfo, uint32_t fFlags, PRTVFSIOSTREAM phVfsIos);
563
564	/** @name RTVFSFSSTRM_PUSH_F_XXX - Flags for RTVfsFsStrmPushFile.
565	* @{ */
566	/** Input is an I/O stream of indeterminate length, read to the end and then
567	* update the file header.
568	* @note This is only possible if the output stream is actually a file. */
569	#define RTVFSFSSTRM_PUSH_F_STREAM RT_BIT_32(0)
570	/** Mask of flags specific to the target stream. */
571	#define RTVFSFSSTRM_PUSH_F_SPECIFIC_MASK UINT32_C(0xff000000)
572	/** Valid bits. */
573	#define RTVFSFSSTRM_PUSH_F_VALID_MASK UINT32_C(0xff000001)
574	/** @} */
575
576	/**
577	* Marks the end of the stream.
578	*
579	* The stream must be writable.
580	*
581	* @returns IPRT status code.
582	* @retval VERR_INVALID_FUNCTION if called on a non-writable stream.
583	* @param hVfsFss The file system stream handle.
584	*/
585	RTDECL(int) RTVfsFsStrmEnd(RTVFSFSSTREAM hVfsFss);
586
587	/** @} */
588
589
590	/** @defgroup grp_rt_vfs_dir VFS Directory API
591	* @{
592	*/
593
594	/**
595	* Retains a reference to the VFS directory handle.
596	*
597	* @returns New reference count on success, UINT32_MAX on failure.
598	* @param hVfsDir The VFS directory handle.
599	*/
600	RTDECL(uint32_t) RTVfsDirRetain(RTVFSDIR hVfsDir);
601	RTDECL(uint32_t) RTVfsDirRetainDebug(RTVFSDIR hVfsDir, RT_SRC_POS_DECL);
602
603	/**
604	* Releases a reference to the VFS directory handle.
605	*
606	* @returns New reference count on success (0 if closed), UINT32_MAX on failure.
607	* @param hVfsDir The VFS directory handle.
608	*/
609	RTDECL(uint32_t) RTVfsDirRelease(RTVFSDIR hVfsDir);
610
611	/**
612	* Opens a directory in the specified file system.
613	*
614	* @returns IPRT status code.
615	* @param hVfs The VFS to open the directory within.
616	* @param pszPath Path to the directory, relative to the root.
617	* @param fFlags Reserved, MBZ.
618	* @param phVfsDir Where to return the directory.
619	*/
620	RTDECL(int) RTVfsDirOpen(RTVFS hVfs, const char *pszPath, uint32_t fFlags, PRTVFSDIR phVfsDir);
621
622	/**
623	* Opens any file system object in or under the given directory.
624	*
625	* @returns IPRT status code.
626	* @param hVfsDir The VFS directory start walking the @a pszPath
627	* relative to.
628	* @param pszPath Path to the file.
629	* @param fFileOpen RTFILE_O_XXX flags.
630	* @param fObjFlags More flags: RTVFSOBJ_F_XXX, RTPATH_F_XXX.
631	* @param phVfsObj Where to return the object handle.
632	* @sa RTVfsObjOpen, RTVfsDirOpenDir, RTVfsDirOpenFile
633	*/
634	RTDECL(int) RTVfsDirOpenObj(RTVFSDIR hVfsDir, const char *pszPath, uint64_t fFileOpen, uint32_t fObjFlags, PRTVFSOBJ phVfsObj);
635
636	/**
637	* Opens a file in or under the given directory.
638	*
639	* @returns IPRT status code.
640	* @param hVfsDir The VFS directory start walking the @a pszPath
641	* relative to.
642	* @param pszPath Path to the file.
643	* @param fOpen RTFILE_O_XXX flags.
644	* @param phVfsFile Where to return the file.
645	* @sa RTVfsDirOpenFileAsIoStream
646	*/
647	RTDECL(int) RTVfsDirOpenFile(RTVFSDIR hVfsDir, const char *pszPath, uint64_t fOpen, PRTVFSFILE phVfsFile);
648
649	/**
650	* Convenience wrapper around RTVfsDirOpenFile that returns an I/O stream.
651	*
652	* @returns IPRT status code.
653	* @param hVfsDir The VFS directory start walking the @a pszPath
654	* relative to.
655	* @param pszPath Path to the file.
656	* @param fOpen RTFILE_O_XXX flags.
657	* @param phVfsIos Where to return the I/O stream handle of the file.
658	* @sa RTVfsDirOpenFile
659	*/
660	RTDECL(int) RTVfsDirOpenFileAsIoStream(RTVFSDIR hVfsDir, const char *pszPath, uint64_t fOpen, PRTVFSIOSTREAM phVfsIos);
661
662	/**
663	* Opens a directory in or under the given directory.
664	*
665	* @returns IPRT status code.
666	* @param hVfsDir The VFS directory start walking the @a pszPath
667	* relative to.
668	* @param pszPath Path to the file.
669	* @param fFlags Reserved, MBZ.
670	* @param phVfsDir Where to return the directory.
671	*/
672	RTDECL(int) RTVfsDirOpenDir(RTVFSDIR hVfsDir, const char *pszPath, uint32_t fFlags, PRTVFSDIR phVfsDir);
673
674	/**
675	* Creates a directory relative to @a hVfsDir.
676	*
677	* @returns IPRT status code
678	* @param hVfsDir The directory the path is relative to.
679	* @param pszRelPath The relative path to the new directory.
680	* @param fMode The file mode for the new directory.
681	* @param fFlags Directory creation flags, RTDIRCREATE_FLAGS_XXX.
682	* @param phVfsDir Where to return the handle to the newly created
683	* directory. Optional.
684	* @sa RTDirCreate, RTDirRelDirCreate
685	*/
686	RTDECL(int) RTVfsDirCreateDir(RTVFSDIR hVfsDir, const char *pszRelPath, RTFMODE fMode, uint32_t fFlags, PRTVFSDIR phVfsDir);
687
688	/**
689	* Create a VFS directory handle from a standard IPRT directory handle (RTDIR).
690	*
691	* @returns IPRT status code.
692	* @param hDir The standard IPRT directory handle.
693	* @param fLeaveOpen Whether to leave the handle open when the VFS
694	* directory is released, or to close it (@c false).
695	* @param phVfsDir Where to return the VFS directory handle.
696	*/
697	RTDECL(int) RTVfsDirFromRTDir(RTDIR hDir, bool fLeaveOpen, PRTVFSDIR phVfsDir);
698
699	/**
700	* RTDirOpen + RTVfsDirFromRTDir.
701	*
702	* @returns IPRT status code.
703	* @param pszPath The path to the directory.
704	* @param fFlags RTDIR_F_XXX.
705	* @param phVfsDir Where to return the VFS directory handle.
706	*/
707	RTDECL(int) RTVfsDirOpenNormal(const char *pszPath, uint32_t fFlags, PRTVFSDIR phVfsDir);
708
709	/** Checks if @a hVfsDir was opened using RTVfsDirOpenNormal() or
710	* RTVfsDirFromRTDir(), either directly or indirectly. */
711	RTDECL(bool) RTVfsDirIsStdDir(RTVFSDIR hVfsDir);
712
713	/**
714	* Queries information about a object in or under the given directory.
715	*
716	* @returns IPRT Status code.
717	* @param hVfsDir The VFS directory start walking the @a pszPath
718	* relative to.
719	* @param pszPath Path to the object.
720	* @param pObjInfo Where to return info.
721	* @param enmAddAttr What to return.
722	* @param fFlags RTPATH_F_XXX.
723	* @sa RTPathQueryInfoEx, RTVfsQueryPathInfo, RTVfsObjQueryInfo
724	*/
725	RTDECL(int) RTVfsDirQueryPathInfo(RTVFSDIR hVfsDir, const char *pszPath, PRTFSOBJINFO pObjInfo,
726	RTFSOBJATTRADD enmAddAttr, uint32_t fFlags);
727
728	/**
729	* Removes a directory relative to @a hVfsDir.
730	*
731	* @returns IPRT status code.
732	* @param hVfsDir The VFS directory to start walking the @a pszRelPath
733	* relative to.
734	* @param pszRelPath The path to the directory that should be removed.
735	* @param fFlags Reserved, MBZ.
736	*/
737	RTDECL(int) RTVfsDirRemoveDir(RTVFSDIR hVfsDir, const char *pszRelPath, uint32_t fFlags);
738
739	/**
740	* Reads the next entry in the directory returning extended information.
741	*
742	* @returns VINF_SUCCESS and data in pDirEntry on success.
743	* @returns VERR_NO_MORE_FILES when the end of the directory has been reached.
744	* @returns VERR_BUFFER_OVERFLOW if the buffer is too small to contain the filename. If
745	* pcbDirEntry is specified it will be updated with the required buffer size.
746	* @returns suitable iprt status code on other errors.
747	*
748	* @param hVfsDir The VFS directory.
749	* @param pDirEntry Where to store the information about the next
750	* directory entry on success.
751	* @param pcbDirEntry Optional parameter used for variable buffer size.
752	*
753	* On input the variable pointed to contains the size of the pDirEntry
754	* structure. This must be at least OFFSET(RTDIRENTRYEX, szName[2]) bytes.
755	*
756	* On successful output the field is updated to
757	* OFFSET(RTDIRENTRYEX, szName[pDirEntry->cbName + 1]).
758	*
759	* When the data doesn't fit in the buffer and VERR_BUFFER_OVERFLOW is
760	* returned, this field contains the required buffer size.
761	*
762	* The value is unchanged in all other cases.
763	* @param enmAddAttr Which set of additional attributes to request.
764	* Use RTFSOBJATTRADD_NOTHING if this doesn't matter.
765	*
766	* @sa RTDirReadEx
767	*/
768	RTDECL(int) RTVfsDirReadEx(RTVFSDIR hVfsDir, PRTDIRENTRYEX pDirEntry, size_t *pcbDirEntry, RTFSOBJATTRADD enmAddAttr);
769
770	/**
771	* Rewind and restart the directory reading.
772	*
773	* @returns IRPT status code.
774	* @param hVfsDir The VFS directory.
775	*/
776	RTDECL(int) RTVfsDirRewind(RTVFSDIR hVfsDir);
777
778	/** @} */
779
780
781	/** @defgroup grp_rt_vfs_symlink VFS Symbolic Link API
782	*
783	* @remarks The TAR VFS and filesystem stream uses symbolic links for
784	* describing hard links as well. The users must use RTFS_IS_SYMLINK
785	* to check if it is a real symlink in those cases.
786	*
787	* @remarks Any VFS which is backed by a real file system may be subject to
788	* races with other processes or threads, so the user may get
789	* unexpected errors when this happends. This is a bit host specific,
790	* i.e. it might be prevent on windows if we care.
791	*
792	* @{
793	*/
794
795
796	/**
797	* Retains a reference to the VFS symbolic link handle.
798	*
799	* @returns New reference count on success, UINT32_MAX on failure.
800	* @param hVfsSym The VFS symbolic link handle.
801	*/
802	RTDECL(uint32_t) RTVfsSymlinkRetain(RTVFSSYMLINK hVfsSym);
803	RTDECL(uint32_t) RTVfsSymlinkRetainDebug(RTVFSSYMLINK hVfsSym, RT_SRC_POS_DECL);
804
805	/**
806	* Releases a reference to the VFS symbolic link handle.
807	*
808	* @returns New reference count on success (0 if closed), UINT32_MAX on failure.
809	* @param hVfsSym The VFS symbolic link handle.
810	*/
811	RTDECL(uint32_t) RTVfsSymlinkRelease(RTVFSSYMLINK hVfsSym);
812
813	/**
814	* Query information about the symbolic link.
815	*
816	* @returns IPRT status code.
817	* @param hVfsSym The VFS symbolic link handle.
818	* @param pObjInfo Where to return the info.
819	* @param enmAddAttr Which additional attributes should be retrieved.
820	*
821	* @sa RTFileQueryInfo, RTPathQueryInfo, RTPathQueryInfoEx
822	*/
823	RTDECL(int) RTVfsSymlinkQueryInfo(RTVFSSYMLINK hVfsSym, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr);
824
825	/**
826	* Set the unix style owner and group.
827	*
828	* @returns IPRT status code.
829	* @param hVfsSym The VFS symbolic link handle.
830	* @param fMode The new mode bits.
831	* @param fMask The mask indicating which bits we are changing.
832	* @sa RTFileSetMode, RTPathSetMode
833	*/
834	RTDECL(int) RTVfsSymlinkSetMode(RTVFSSYMLINK hVfsSym, RTFMODE fMode, RTFMODE fMask);
835
836	/**
837	* Set the timestamps associated with the object.
838	*
839	* @returns IPRT status code.
840	* @param hVfsSym The VFS symbolic link handle.
841	* @param pAccessTime Pointer to the new access time. NULL if not
842	* to be changed.
843	* @param pModificationTime Pointer to the new modifcation time. NULL if
844	* not to be changed.
845	* @param pChangeTime Pointer to the new change time. NULL if not to be
846	* changed.
847	* @param pBirthTime Pointer to the new time of birth. NULL if not to be
848	* changed.
849	* @remarks See RTFileSetTimes for restrictions and behavior imposed by the
850	* host OS or underlying VFS provider.
851	* @sa RTFileSetTimes, RTPathSetTimes
852	*/
853	RTDECL(int) RTVfsSymlinkSetTimes(RTVFSSYMLINK hVfsSym, PCRTTIMESPEC pAccessTime, PCRTTIMESPEC pModificationTime,
854	PCRTTIMESPEC pChangeTime, PCRTTIMESPEC pBirthTime);
855
856	/**
857	* Set the unix style owner and group.
858	*
859	* @returns IPRT status code.
860	* @param hVfsSym The VFS symbolic link handle.
861	* @param uid The user ID of the new owner. NIL_RTUID if
862	* unchanged.
863	* @param gid The group ID of the new owner group. NIL_RTGID if
864	* unchanged.
865	* @sa RTFileSetOwner, RTPathSetOwner.
866	*/
867	RTDECL(int) RTVfsSymlinkSetOwner(RTVFSSYMLINK hVfsSym, RTUID uid, RTGID gid);
868
869	/**
870	* Read the symbolic link target.
871	*
872	* @returns IPRT status code.
873	* @param hVfsSym The VFS symbolic link handle.
874	* @param pszTarget The target buffer.
875	* @param cbTarget The size of the target buffer.
876	* @sa RTSymlinkRead
877	*/
878	RTDECL(int) RTVfsSymlinkRead(RTVFSSYMLINK hVfsSym, char *pszTarget, size_t cbTarget);
879
880	/** @} */
881
882
883
884	/** @defgroup grp_rt_vfs_iostream VFS I/O Stream API
885	* @{
886	*/
887
888	/**
889	* Creates a VFS file from a memory buffer.
890	*
891	* @returns IPRT status code.
892	*
893	* @param fFlags A combination of RTFILE_O_READ and RTFILE_O_WRITE.
894	* @param pvBuf The buffer. This will be copied and not referenced
895	* after this function returns.
896	* @param cbBuf The buffer size.
897	* @param phVfsIos Where to return the VFS I/O stream handle.
898	*/
899	RTDECL(int) RTVfsIoStrmFromBuffer(uint32_t fFlags, void const *pvBuf, size_t cbBuf, PRTVFSIOSTREAM phVfsIos);
900
901	/**
902	* Creates a VFS I/O stream handle from a standard IPRT file handle (RTFILE).
903	*
904	* @returns IPRT status code.
905	* @param hFile The standard IPRT file handle.
906	* @param fOpen The flags the handle was opened with. Pass 0 to
907	* have these detected.
908	* @param fLeaveOpen Whether to leave the handle open when the VFS file
909	* is released, or to close it (@c false).
910	* @param phVfsIos Where to return the VFS I/O stream handle.
911	*/
912	RTDECL(int) RTVfsIoStrmFromRTFile(RTFILE hFile, uint64_t fOpen, bool fLeaveOpen, PRTVFSIOSTREAM phVfsIos);
913
914	/**
915	* Creates a VFS I/O stream handle from a standard IPRT pipe handle (RTPIPE).
916	*
917	* @returns IPRT status code.
918	* @param hPipe The standard IPRT pipe handle.
919	* @param fLeaveOpen Whether to leave the handle open when the VFS file
920	* is released, or to close it (@c false).
921	* @param phVfsIos Where to return the VFS I/O stream handle.
922	*/
923	RTDECL(int) RTVfsIoStrmFromRTPipe(RTPIPE hPipe, bool fLeaveOpen, PRTVFSIOSTREAM phVfsIos);
924
925	/**
926	* Convenience function combining RTFileOpen with RTVfsIoStrmFromRTFile.
927	*
928	* @returns IPRT status code.
929	* @param pszFilename The path to the file in the normal file system.
930	* @param fOpen The flags to pass to RTFileOpen when opening the
931	* file, i.e. RTFILE_O_XXX.
932	* @param phVfsIos Where to return the VFS I/O stream handle.
933	*/
934	RTDECL(int) RTVfsIoStrmOpenNormal(const char *pszFilename, uint64_t fOpen, PRTVFSIOSTREAM phVfsIos);
935
936	/**
937	* Create a VFS I/O stream handle from one of the standard handles.
938	*
939	* @returns IPRT status code.
940	* @param enmStdHandle The standard IPRT file handle.
941	* @param fOpen The flags the handle was opened with. Pass 0 to
942	* have these detected.
943	* @param fLeaveOpen Whether to leave the handle open when the VFS file
944	* is released, or to close it (@c false).
945	* @param phVfsIos Where to return the VFS I/O stream handle.
946	*/
947	RTDECL(int) RTVfsIoStrmFromStdHandle(RTHANDLESTD enmStdHandle, uint64_t fOpen, bool fLeaveOpen,
948	PRTVFSIOSTREAM phVfsIos);
949
950	/**
951	* Retains a reference to the VFS I/O stream handle.
952	*
953	* @returns New reference count on success, UINT32_MAX on failure.
954	* @param hVfsIos The VFS I/O stream handle.
955	*/
956	RTDECL(uint32_t) RTVfsIoStrmRetain(RTVFSIOSTREAM hVfsIos);
957	RTDECL(uint32_t) RTVfsIoStrmRetainDebug(RTVFSIOSTREAM hVfsIos, RT_SRC_POS_DECL);
958
959	/**
960	* Releases a reference to the VFS I/O stream handle.
961	*
962	* @returns New reference count on success (0 if closed), UINT32_MAX on failure.
963	* @param hVfsIos The VFS I/O stream handle.
964	*/
965	RTDECL(uint32_t) RTVfsIoStrmRelease(RTVFSIOSTREAM hVfsIos);
966
967	/**
968	* Convert the VFS I/O stream handle to a VFS file handle.
969	*
970	* @returns The VFS file handle on success, this must be released.
971	* NIL_RTVFSFILE if the I/O stream handle is invalid.
972	* @param hVfsIos The VFS I/O stream handle.
973	* @sa RTVfsFileToIoStream
974	*/
975	RTDECL(RTVFSFILE) RTVfsIoStrmToFile(RTVFSIOSTREAM hVfsIos);
976
977	/**
978	* Query information about the I/O stream.
979	*
980	* @returns IPRT status code.
981	* @param hVfsIos The VFS I/O stream handle.
982	* @param pObjInfo Where to return the info.
983	* @param enmAddAttr Which additional attributes should be retrieved.
984	* @sa RTFileQueryInfo
985	*/
986	RTDECL(int) RTVfsIoStrmQueryInfo(RTVFSIOSTREAM hVfsIos, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr);
987
988	/**
989	* Read bytes from the I/O stream.
990	*
991	* @returns IPRT status code.
992	* @retval VINF_SUCCESS and the number of bytes read written to @a pcbRead.
993	* @retval VINF_TRY_AGAIN if @a fBlocking is @c false, @a pcbRead is not NULL,
994	* and no data was available. @a *pcbRead will be set to 0.
995	* @retval VINF_EOF when trying to read __beyond__ the end of the stream and
996	* @a pcbRead is not NULL (it will be set to the number of bytes read,
997	* or 0 if the end of the stream was reached before this call).
998	* When the last byte of the read request is the last byte in the
999	* stream, this status code will not be used. However, VINF_EOF is
1000	* returned when attempting to read 0 bytes while standing at the end
1001	* of the stream.
1002	* @retval VERR_EOF when trying to read __beyond__ the end of the stream and
1003	* @a pcbRead is NULL.
1004	* @retval VERR_ACCESS_DENIED if the stream is not readable.
1005	*
1006	* @param hVfsIos The VFS I/O stream handle.
1007	* @param pvBuf Where to store the read bytes.
1008	* @param cbToRead The number of bytes to read.
1009	* @param fBlocking Whether the call is blocking (@c true) or not. If
1010	* not, the @a pcbRead parameter must not be NULL.
1011	* @param pcbRead Where to always store the number of bytes actually
1012	* read. This can be NULL if @a fBlocking is true.
1013	* @sa RTVfsFileRead, RTFileRead, RTPipeRead, RTPipeReadBlocking,
1014	* RTSocketRead
1015	*/
1016	RTDECL(int) RTVfsIoStrmRead(RTVFSIOSTREAM hVfsIos, void pvBuf, size_t cbToRead, bool fBlocking, size_t pcbRead);
1017
1018	/**
1019	* Read bytes from the I/O stream, optionally with offset.
1020	*
1021	* @returns IPRT status code.
1022	* @retval VINF_SUCCESS and the number of bytes read written to @a pcbRead.
1023	* @retval VINF_TRY_AGAIN if @a fBlocking is @c false, @a pcbRead is not NULL,
1024	* and no data was available. @a *pcbRead will be set to 0.
1025	* @retval VINF_EOF when trying to read __beyond__ the end of the stream and
1026	* @a pcbRead is not NULL (it will be set to the number of bytes read,
1027	* or 0 if the end of the stream was reached before this call).
1028	* When the last byte of the read request is the last byte in the
1029	* stream, this status code will not be used. However, VINF_EOF is
1030	* returned when attempting to read 0 bytes while standing at the end
1031	* of the stream.
1032	* @retval VERR_EOF when trying to read __beyond__ the end of the stream and
1033	* @a pcbRead is NULL.
1034	* @retval VERR_ACCESS_DENIED if the stream is not readable.
1035	*
1036	* @param hVfsIos The VFS I/O stream handle.
1037	* @param off Where to read at, -1 for the current position.
1038	* @param pvBuf Where to store the read bytes.
1039	* @param cbToRead The number of bytes to read.
1040	* @param fBlocking Whether the call is blocking (@c true) or not. If
1041	* not, the @a pcbRead parameter must not be NULL.
1042	* @param pcbRead Where to always store the number of bytes actually
1043	* read. This can be NULL if @a fBlocking is true.
1044	* @sa RTVfsFileRead, RTFileRead, RTPipeRead, RTPipeReadBlocking,
1045	* RTSocketRead
1046	*/
1047	RTDECL(int) RTVfsIoStrmReadAt(RTVFSIOSTREAM hVfsIos, RTFOFF off, void pvBuf, size_t cbToRead, bool fBlocking, size_t pcbRead);
1048
1049	/**
1050	* Reads the remainder of the stream into a memory buffer.
1051	*
1052	* For simplifying string-style processing, the is a zero byte after the
1053	* returned buffer, making sure it can be used as a zero terminated string.
1054	*
1055	* @returns IPRT status code.
1056	* @param hVfsIos The VFS I/O stream handle.
1057	* @param ppvBuf Where to return the buffer. Must pass to
1058	* RTVfsIoStrmReadAllFree for freeing, not RTMemFree!
1059	* @param pcbBuf Where to return the buffer size.
1060	*/
1061	RTDECL(int) RTVfsIoStrmReadAll(RTVFSIOSTREAM hVfsIos, void *ppvBuf, size_t pcbBuf);
1062
1063	/**
1064	* Free memory buffer returned by RTVfsIoStrmReadAll.
1065	*
1066	* @param pvBuf What RTVfsIoStrmReadAll returned.
1067	* @param cbBuf What RTVfsIoStrmReadAll returned.
1068	*/
1069	RTDECL(void) RTVfsIoStrmReadAllFree(void *pvBuf, size_t cbBuf);
1070
1071	/**
1072	* Write bytes to the I/O stream.
1073	*
1074	* @returns IPRT status code.
1075	* @retval VERR_ACCESS_DENIED if the stream is not writable.
1076	*
1077	* @param hVfsIos The VFS I/O stream handle.
1078	* @param pvBuf The bytes to write.
1079	* @param cbToWrite The number of bytes to write.
1080	* @param fBlocking Whether the call is blocking (@c true) or not. If
1081	* not, the @a pcbWritten parameter must not be NULL.
1082	* @param pcbWritten Where to always store the number of bytes actually
1083	* written. This can be NULL if @a fBlocking is true.
1084	* @sa RTVfsFileWrite, RTFileWrite, RTPipeWrite, RTPipeWriteBlocking,
1085	* RTSocketWrite
1086	*/
1087	RTDECL(int) RTVfsIoStrmWrite(RTVFSIOSTREAM hVfsIos, const void pvBuf, size_t cbToWrite, bool fBlocking, size_t pcbWritten);
1088	RTDECL(int) RTVfsIoStrmWriteAt(RTVFSIOSTREAM hVfsIos, RTFOFF off, const void pvBuf, size_t cbToWrite, bool fBlocking, size_t pcbWritten);
1089
1090	/**
1091	* Reads bytes from the I/O stream into a scatter buffer.
1092	*
1093	* @returns IPRT status code.
1094	* @retval VINF_SUCCESS and the number of bytes read written to @a pcbRead.
1095	* @retval VINF_TRY_AGAIN if @a fBlocking is @c false, @a pcbRead is not NULL,
1096	* and no data was available. @a *pcbRead will be set to 0.
1097	* @retval VINF_EOF when trying to read __beyond__ the end of the stream and
1098	* @a pcbRead is not NULL (it will be set to the number of bytes read,
1099	* or 0 if the end of the stream was reached before this call).
1100	* When the last byte of the read request is the last byte in the
1101	* stream, this status code will not be used. However, VINF_EOF is
1102	* returned when attempting to read 0 bytes while standing at the end
1103	* of the stream.
1104	* @retval VERR_EOF when trying to read __beyond__ the end of the stream and
1105	* @a pcbRead is NULL.
1106	* @retval VERR_ACCESS_DENIED if the stream is not readable.
1107	*
1108	* @param hVfsIos The VFS I/O stream handle.
1109	* @param off Where to read at, -1 for the current position.
1110	* @param pSgBuf Pointer to a scatter buffer descriptor. The number
1111	* of bytes described by the segments is what will be
1112	* attemted read.
1113	* @param fBlocking Whether the call is blocking (@c true) or not. If
1114	* not, the @a pcbRead parameter must not be NULL.
1115	* @param pcbRead Where to always store the number of bytes actually
1116	* read. This can be NULL if @a fBlocking is true.
1117	* @sa RTFileSgRead, RTSocketSgRead, RTPipeRead, RTPipeReadBlocking
1118	*/
1119	RTDECL(int) RTVfsIoStrmSgRead(RTVFSIOSTREAM hVfsIos, RTFOFF off, PCRTSGBUF pSgBuf, bool fBlocking, size_t *pcbRead);
1120
1121	/**
1122	* Write bytes to the I/O stream from a gather buffer.
1123	*
1124	* @returns IPRT status code.
1125	* @retval VERR_ACCESS_DENIED if the stream is not writable.
1126	*
1127	* @param hVfsIos The VFS I/O stream handle.
1128	* @param off Where to write at, -1 for the current position.
1129	* @param pSgBuf Pointer to a gather buffer descriptor. The number
1130	* of bytes described by the segments is what will be
1131	* attemted written.
1132	* @param fBlocking Whether the call is blocking (@c true) or not. If
1133	* not, the @a pcbWritten parameter must not be NULL.
1134	* @param pcbWritten Where to always store the number of bytes actually
1135	* written. This can be NULL if @a fBlocking is true.
1136	* @sa RTFileSgWrite, RTSocketSgWrite
1137	*/
1138	RTDECL(int) RTVfsIoStrmSgWrite(RTVFSIOSTREAM hVfsIos, RTFOFF off, PCRTSGBUF pSgBuf, bool fBlocking, size_t *pcbWritten);
1139
1140	/**
1141	* Flush any buffered data to the I/O stream.
1142	*
1143	* @returns IPRT status code.
1144	* @param hVfsIos The VFS I/O stream handle.
1145	* @sa RTVfsFileFlush, RTFileFlush, RTPipeFlush
1146	*/
1147	RTDECL(int) RTVfsIoStrmFlush(RTVFSIOSTREAM hVfsIos);
1148
1149	/**
1150	* Poll for events.
1151	*
1152	* @returns IPRT status code.
1153	* @param hVfsIos The VFS I/O stream handle.
1154	* @param fEvents The events to poll for (RTPOLL_EVT_XXX).
1155	* @param cMillies How long to wait for event to eventuate.
1156	* @param fIntr Whether the wait is interruptible and can return
1157	* VERR_INTERRUPTED (@c true) or if this condition
1158	* should be hidden from the caller (@c false).
1159	* @param pfRetEvents Where to return the event mask.
1160	* @sa RTVfsFilePoll, RTPollSetAdd, RTPoll, RTPollNoResume.
1161	*/
1162	RTDECL(int) RTVfsIoStrmPoll(RTVFSIOSTREAM hVfsIos, uint32_t fEvents, RTMSINTERVAL cMillies, bool fIntr,
1163	uint32_t *pfRetEvents);
1164	/**
1165	* Tells the current I/O stream position.
1166	*
1167	* @returns Zero or higher - where to return the I/O stream offset. Values
1168	* below zero are IPRT status codes (VERR_XXX).
1169	* @param hVfsIos The VFS I/O stream handle.
1170	* @sa RTFileTell
1171	*/
1172	RTDECL(RTFOFF) RTVfsIoStrmTell(RTVFSIOSTREAM hVfsIos);
1173
1174	/**
1175	* Skips @a cb ahead in the stream.
1176	*
1177	* @returns IPRT status code.
1178	* @param hVfsIos The VFS I/O stream handle.
1179	* @param cb The number bytes to skip.
1180	*/
1181	RTDECL(int) RTVfsIoStrmSkip(RTVFSIOSTREAM hVfsIos, RTFOFF cb);
1182
1183	/**
1184	* Fills the stream with @a cb zeros.
1185	*
1186	* @returns IPRT status code.
1187	* @param hVfsIos The VFS I/O stream handle.
1188	* @param cb The number of zero bytes to insert.
1189	*/
1190	RTDECL(int) RTVfsIoStrmZeroFill(RTVFSIOSTREAM hVfsIos, RTFOFF cb);
1191
1192	/**
1193	* Checks if we're at the end of the I/O stream.
1194	*
1195	* @returns true if at EOS, otherwise false.
1196	* @param hVfsIos The VFS I/O stream handle.
1197	*/
1198	RTDECL(bool) RTVfsIoStrmIsAtEnd(RTVFSIOSTREAM hVfsIos);
1199
1200	/**
1201	* Get the RTFILE_O_XXX flags for the I/O stream.
1202	*
1203	* @returns RTFILE_O_XXX, 0 on failure.
1204	* @param hVfsIos The VFS I/O stream handle.
1205	*/
1206	RTDECL(uint64_t) RTVfsIoStrmGetOpenFlags(RTVFSIOSTREAM hVfsIos);
1207
1208	/**
1209	* Process the rest of the stream, checking if it's all valid UTF-8 encoding.
1210	*
1211	* @returns IPRT status code.
1212	*
1213	* @param hVfsIos The VFS I/O stream handle.
1214	* @param fFlags Flags governing the validation, see
1215	* RTVFS_VALIDATE_UTF8_XXX.
1216	* @param poffError Where to return the error offset. Optional.
1217	*/
1218	RTDECL(int) RTVfsIoStrmValidateUtf8Encoding(RTVFSIOSTREAM hVfsIos, uint32_t fFlags, PRTFOFF poffError);
1219
1220	/** @defgroup RTVFS_VALIDATE_UTF8_XXX RTVfsIoStrmValidateUtf8Encoding flags.
1221	* @{ */
1222	/** The text must not contain any null terminator codepoints. */
1223	#define RTVFS_VALIDATE_UTF8_NO_NULL RT_BIT_32(0)
1224	/** The codepoints must be in the range covered by RTC-3629. */
1225	#define RTVFS_VALIDATE_UTF8_BY_RTC_3629 RT_BIT_32(1)
1226	/** Mask of valid flags. */
1227	#define RTVFS_VALIDATE_UTF8_VALID_MASK UINT32_C(0x00000003)
1228	/** @} */
1229
1230	/**
1231	* Printf-like write function.
1232	*
1233	* @returns Number of characters written on success, negative error status on
1234	* failure.
1235	* @param hVfsIos The VFS I/O stream handle to write to.
1236	* @param pszFormat The format string.
1237	* @param ... Format arguments.
1238	*/
1239	RTDECL(ssize_t) RTVfsIoStrmPrintf(RTVFSIOSTREAM hVfsIos, const char *pszFormat, ...);
1240
1241	/**
1242	* Printf-like write function.
1243	*
1244	* @returns Number of characters written on success, negative error status on
1245	* failure.
1246	* @param hVfsIos The VFS I/O stream handle to write to.
1247	* @param pszFormat The format string.
1248	* @param va Format arguments.
1249	*/
1250	RTDECL(ssize_t) RTVfsIoStrmPrintfV(RTVFSIOSTREAM hVfsIos, const char *pszFormat, va_list va);
1251
1252	/**
1253	* VFS I/O stream output buffer structure to use with
1254	* RTVfsIoStrmStrOutputCallback().
1255	*/
1256	typedef struct VFSIOSTRMOUTBUF
1257	{
1258	/** The I/O stream handle. */
1259	RTVFSIOSTREAM hVfsIos;
1260	/** Size of this structure (for sanity). */
1261	size_t cbSelf;
1262	/** Status code of the operation. */
1263	int rc;
1264	/** Current offset into szBuf (number of output bytes pending). */
1265	size_t offBuf;
1266	/** Modest output buffer. */
1267	char szBuf[256];
1268	} VFSIOSTRMOUTBUF;
1269	/** Pointer to an VFS I/O stream output buffer for use with
1270	* RTVfsIoStrmStrOutputCallback() */
1271	typedef VFSIOSTRMOUTBUF *PVFSIOSTRMOUTBUF;
1272
1273	/** Initializer for a VFS I/O stream output buffer. */
1274	#define VFSIOSTRMOUTBUF_INIT(a_pOutBuf, a_hVfsIos) \
1275	do { \
1276	(a_pOutBuf)->hVfsIos = a_hVfsIos; \
1277	(a_pOutBuf)->cbSelf = sizeof(*(a_pOutBuf)); \
1278	(a_pOutBuf)->rc = VINF_SUCCESS; \
1279	(a_pOutBuf)->offBuf = 0; \
1280	(a_pOutBuf)->szBuf[0] = '\0'; \
1281	} while (0)
1282
1283	/**
1284	* @callback_method_impl{FNRTSTROUTPUT,
1285	* For use with VFSIOSTRMOUTBUF.
1286	*
1287	* Users must use VFSIOSTRMOUTBUF_INIT to initialize a VFSIOSTRMOUTBUF and pass
1288	* that as the outputter argument to the function this callback is handed to.}
1289	*/
1290	RTDECL(size_t) RTVfsIoStrmStrOutputCallback(void pvArg, const char pachChars, size_t cbChars);
1291
1292	/** @} */
1293
1294
1295	/** @defgroup grp_rt_vfs_file VFS File API
1296	* @{
1297	*/
1298	RTDECL(int) RTVfsFileOpen(RTVFS hVfs, const char *pszFilename, uint64_t fOpen, PRTVFSFILE phVfsFile);
1299
1300	/**
1301	* Create a VFS file handle from a standard IPRT file handle (RTFILE).
1302	*
1303	* @returns IPRT status code.
1304	* @param hFile The standard IPRT file handle.
1305	* @param fOpen The flags the handle was opened with. Pass 0 to
1306	* have these detected.
1307	* @param fLeaveOpen Whether to leave the handle open when the VFS file
1308	* is released, or to close it (@c false).
1309	* @param phVfsFile Where to return the VFS file handle.
1310	*/
1311	RTDECL(int) RTVfsFileFromRTFile(RTFILE hFile, uint64_t fOpen, bool fLeaveOpen, PRTVFSFILE phVfsFile);
1312	RTDECL(RTHCUINTPTR) RTVfsFileToNative(RTFILE hVfsFile);
1313
1314	/**
1315	* Convenience function combining RTFileOpen with RTVfsFileFromRTFile.
1316	*
1317	* @returns IPRT status code.
1318	* @param pszFilename The path to the file in the normal file system.
1319	* @param fOpen The flags to pass to RTFileOpen when opening the
1320	* file, i.e. RTFILE_O_XXX.
1321	* @param phVfsFile Where to return the VFS file handle.
1322	*/
1323	RTDECL(int) RTVfsFileOpenNormal(const char *pszFilename, uint64_t fOpen, PRTVFSFILE phVfsFile);
1324
1325	/**
1326	* Convert the VFS file handle to a VFS I/O stream handle.
1327	*
1328	* @returns The VFS I/O stream handle on success, this must be released.
1329	* NIL_RTVFSIOSTREAM if the file handle is invalid.
1330	* @param hVfsFile The VFS file handle.
1331	* @sa RTVfsIoStrmToFile
1332	*/
1333	RTDECL(RTVFSIOSTREAM) RTVfsFileToIoStream(RTVFSFILE hVfsFile);
1334
1335	/**
1336	* Retains a reference to the VFS file handle.
1337	*
1338	* @returns New reference count on success, UINT32_MAX on failure.
1339	* @param hVfsFile The VFS file handle.
1340	*/
1341	RTDECL(uint32_t) RTVfsFileRetain(RTVFSFILE hVfsFile);
1342	RTDECL(uint32_t) RTVfsFileRetainDebug(RTVFSFILE hVfsFile, RT_SRC_POS_DECL);
1343
1344	/**
1345	* Releases a reference to the VFS file handle.
1346	*
1347	* @returns New reference count on success (0 if closed), UINT32_MAX on failure.
1348	* @param hVfsFile The VFS file handle.
1349	*/
1350	RTDECL(uint32_t) RTVfsFileRelease(RTVFSFILE hVfsFile);
1351
1352	/**
1353	* Query information about the object.
1354	*
1355	* @returns IPRT status code.
1356	* @retval VERR_NOT_SUPPORTED if the @a enmAddAttr value is not handled by the
1357	* implementation.
1358	*
1359	* @param hVfsFile The VFS file handle.
1360	* @param pObjInfo Where to return the info.
1361	* @param enmAddAttr Which additional attributes should be retrieved.
1362	* @sa RTVfsObjQueryInfo, RTVfsFsStrmQueryInfo, RTVfsDirQueryInfo,
1363	* RTVfsIoStrmQueryInfo, RTVfsFileQueryInfo, RTFileQueryInfo,
1364	* RTPathQueryInfo.
1365	*/
1366	RTDECL(int) RTVfsFileQueryInfo(RTVFSFILE hVfsFile, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr);
1367
1368	/**
1369	* Read bytes from the file at the current position.
1370	*
1371	* @returns IPRT status code.
1372	* @retval VINF_SUCCESS and the number of bytes read written to @a pcbRead.
1373	* @retval VINF_EOF when trying to read __beyond__ the end of the file and
1374	* @a pcbRead is not NULL (it will be set to the number of bytes read,
1375	* or 0 if the end of the file was reached before this call).
1376	* When the last byte of the read request is the last byte in the
1377	* file, this status code will not be used. However, VINF_EOF is
1378	* returned when attempting to read 0 bytes while standing at the end
1379	* of the file.
1380	* @retval VERR_EOF when trying to read __beyond__ the end of the file and
1381	* @a pcbRead is NULL.
1382	* @retval VERR_ACCESS_DENIED if the file is not readable.
1383	*
1384	* @param hVfsFile The VFS file handle.
1385	* @param pvBuf Where to store the read bytes.
1386	* @param cbToRead The number of bytes to read.
1387	* @param pcbRead Where to always store the number of bytes actually
1388	* read. Optional.
1389	* @sa RTVfsIoStrmRead, RTFileRead, RTPipeRead, RTPipeReadBlocking,
1390	* RTSocketRead
1391	*/
1392	RTDECL(int) RTVfsFileRead(RTVFSFILE hVfsFile, void pvBuf, size_t cbToRead, size_t pcbRead);
1393	RTDECL(int) RTVfsFileReadAt(RTVFSFILE hVfsFile, RTFOFF off, void pvBuf, size_t cbToRead, size_t pcbRead);
1394
1395	/**
1396	* Write bytes to the file at the current position.
1397	*
1398	* @returns IPRT status code.
1399	* @retval VERR_ACCESS_DENIED if the file is not writable.
1400	*
1401	* @param hVfsFile The VFS file handle.
1402	* @param pvBuf The bytes to write.
1403	* @param cbToWrite The number of bytes to write.
1404	* @param pcbWritten Where to always store the number of bytes actually
1405	* written. This can be NULL.
1406	* @sa RTVfsIoStrmRead, RTFileWrite, RTPipeWrite, RTPipeWriteBlocking,
1407	* RTSocketWrite
1408	*/
1409	RTDECL(int) RTVfsFileWrite(RTVFSFILE hVfsFile, const void pvBuf, size_t cbToWrite, size_t pcbWritten);
1410	RTDECL(int) RTVfsFileWriteAt(RTVFSFILE hVfsFile, RTFOFF off, const void pvBuf, size_t cbToWrite, size_t pcbWritten);
1411
1412
1413	/**
1414	* Reads bytes from the file into a scatter buffer.
1415	*
1416	* @returns IPRT status code.
1417	* @retval VINF_SUCCESS and the number of bytes read written to @a pcbRead.
1418	* @retval VINF_TRY_AGAIN if @a fBlocking is @c false, @a pcbRead is not NULL,
1419	* and no data was available. @a *pcbRead will be set to 0.
1420	* @retval VINF_EOF when trying to read __beyond__ the end of the stream and
1421	* @a pcbRead is not NULL (it will be set to the number of bytes read,
1422	* or 0 if the end of the stream was reached before this call).
1423	* When the last byte of the read request is the last byte in the
1424	* stream, this status code will not be used. However, VINF_EOF is
1425	* returned when attempting to read 0 bytes while standing at the end
1426	* of the stream.
1427	* @retval VERR_EOF when trying to read __beyond__ the end of the stream and
1428	* @a pcbRead is NULL.
1429	* @retval VERR_ACCESS_DENIED if the stream is not readable.
1430	*
1431	* @param hVfsFile The VFS file handle.
1432	* @param off Where to read at, -1 for the current position.
1433	* @param pSgBuf Pointer to a scatter buffer descriptor. The number
1434	* of bytes described by the segments is what will be
1435	* attemted read.
1436	* @param fBlocking Whether the call is blocking (@c true) or not. If
1437	* not, the @a pcbRead parameter must not be NULL.
1438	* @param pcbRead Where to always store the number of bytes actually
1439	* read. This can be NULL if @a fBlocking is true.
1440	* @sa RTFileSgRead, RTSocketSgRead, RTPipeRead, RTPipeReadBlocking
1441	*/
1442	RTDECL(int) RTVfsFileSgRead(RTVFSFILE hVfsFile, RTFOFF off, PCRTSGBUF pSgBuf, bool fBlocking, size_t *pcbRead);
1443
1444	/**
1445	* Write bytes to the file from a gather buffer.
1446	*
1447	* @returns IPRT status code.
1448	* @retval VERR_ACCESS_DENIED if the stream is not writable.
1449	*
1450	* @param hVfsFile The VFS file handle.
1451	* @param off Where to write at, -1 for the current position.
1452	* @param pSgBuf Pointer to a gather buffer descriptor. The number
1453	* of bytes described by the segments is what will be
1454	* attemted written.
1455	* @param fBlocking Whether the call is blocking (@c true) or not. If
1456	* not, the @a pcbWritten parameter must not be NULL.
1457	* @param pcbWritten Where to always store the number of bytes actually
1458	* written. This can be NULL if @a fBlocking is true.
1459	* @sa RTFileSgWrite, RTSocketSgWrite
1460	*/
1461	RTDECL(int) RTVfsFileSgWrite(RTVFSFILE hVfsFile, RTFOFF off, PCRTSGBUF pSgBuf, bool fBlocking, size_t *pcbWritten);
1462
1463	/**
1464	* Flush any buffered data to the file.
1465	*
1466	* @returns IPRT status code.
1467	* @param hVfsFile The VFS file handle.
1468	* @sa RTVfsIoStrmFlush, RTFileFlush, RTPipeFlush
1469	*/
1470	RTDECL(int) RTVfsFileFlush(RTVFSFILE hVfsFile);
1471
1472	/**
1473	* Poll for events.
1474	*
1475	* @returns IPRT status code.
1476	* @param hVfsFile The VFS file handle.
1477	* @param fEvents The events to poll for (RTPOLL_EVT_XXX).
1478	* @param cMillies How long to wait for event to eventuate.
1479	* @param fIntr Whether the wait is interruptible and can return
1480	* VERR_INTERRUPTED (@c true) or if this condition
1481	* should be hidden from the caller (@c false).
1482	* @param pfRetEvents Where to return the event mask.
1483	* @sa RTVfsIoStrmPoll, RTPollSetAdd, RTPoll, RTPollNoResume.
1484	*/
1485	RTDECL(RTFOFF) RTVfsFilePoll(RTVFSFILE hVfsFile, uint32_t fEvents, RTMSINTERVAL cMillies, bool fIntr,
1486	uint32_t *pfRetEvents);
1487
1488	/**
1489	* Tells the current file position.
1490	*
1491	* @returns Zero or higher - where to return the file offset. Values
1492	* below zero are IPRT status codes (VERR_XXX).
1493	* @param hVfsFile The VFS file handle.
1494	* @sa RTFileTell, RTVfsIoStrmTell.
1495	*/
1496	RTDECL(RTFOFF) RTVfsFileTell(RTVFSFILE hVfsFile);
1497
1498	/**
1499	* Changes the current read/write position of a file.
1500	*
1501	* @returns IPRT status code.
1502	*
1503	* @param hVfsFile The VFS file handle.
1504	* @param offSeek The seek offset.
1505	* @param uMethod The seek method.
1506	* @param poffActual Where to optionally return the new file offset.
1507	*
1508	* @sa RTFileSeek
1509	*/
1510	RTDECL(int) RTVfsFileSeek(RTVFSFILE hVfsFile, RTFOFF offSeek, uint32_t uMethod, uint64_t *poffActual);
1511
1512	/**
1513	* Sets the size of a file.
1514	*
1515	* This may also be used for preallocating space
1516	* (RTVFSFILE_SIZE_F_PREALLOC_KEEP_SIZE).
1517	*
1518	* @returns IPRT status code.
1519	* @retval VERR_ACCESS_DENIED if handle isn't writable.
1520	* @retval VERR_WRITE_PROTECT if read-only file system.
1521	* @retval VERR_FILE_TOO_BIG if cbSize is larger than what the file system can
1522	* theoretically deal with.
1523	* @retval VERR_DISK_FULL if the file system if full.
1524	* @retval VERR_NOT_SUPPORTED if fFlags indicates some operation that's not
1525	* supported by the file system / host operating system.
1526	*
1527	* @param hVfsFile The VFS file handle.
1528	* @param cbSize The new file size.
1529	* @param fFlags RTVFSFILE_SIZE_F_NORMAL, RTVFSFILE_SIZE_F_GROW, or
1530	* RTVFSFILE_SIZE_F_GROW_KEEP_SIZE.
1531	*
1532	* @sa RTFileSetSize, RTFileSetAllocationSize
1533	*/
1534	RTDECL(int) RTVfsFileSetSize(RTVFSFILE hVfsFile, uint64_t cbSize, uint32_t fFlags);
1535
1536	/** @name RTVFSFILE_SIZE_F_XXX - RTVfsFileSetSize flags.
1537	* @{ */
1538	/** Normal truncate or grow (zero'ed) like RTFileSetSize . */
1539	#define RTVFSFILE_SIZE_F_NORMAL UINT32_C(0x00000001)
1540	/** Only grow the file, ignore call if cbSize would truncate the file.
1541	* This is what RTFileSetAllocationSize does by default. */
1542	#define RTVFSFILE_SIZE_F_GROW UINT32_C(0x00000002)
1543	/** Only grow the file, ignore call if cbSize would truncate the file.
1544	* This is what RTFileSetAllocationSize does by default. */
1545	#define RTVFSFILE_SIZE_F_GROW_KEEP_SIZE UINT32_C(0x00000003)
1546	/** Action mask. */
1547	#define RTVFSFILE_SIZE_F_ACTION_MASK UINT32_C(0x00000003)
1548	/** Validate the flags.
1549	* Will reference @a a_fFlags more than once. */
1550	#define RTVFSFILE_SIZE_F_IS_VALID(a_fFlags) \
1551	( !((a_fFlags) & ~RTVFSFILE_SIZE_F_ACTION_MASK) && ((a_fFlags) & RTVFSFILE_SIZE_F_ACTION_MASK) != 0 )
1552	/** Mask of valid flags. */
1553	#define RTFILE_ALLOC_SIZE_F_VALID (RTFILE_ALLOC_SIZE_F_KEEP_SIZE)
1554	/** @} */
1555
1556
1557	RTDECL(int) RTVfsFileQuerySize(RTVFSFILE hVfsFile, uint64_t *pcbSize);
1558	RTDECL(RTFOFF) RTVfsFileGetMaxSize(RTVFSFILE hVfsFile);
1559	RTDECL(int) RTVfsFileQueryMaxSize(RTVFSFILE hVfsFile, uint64_t *pcbMax);
1560
1561	/**
1562	* Get the RTFILE_O_XXX flags for the I/O stream.
1563	*
1564	* @returns RTFILE_O_XXX, 0 on failure.
1565	* @param hVfsFile The VFS file handle.
1566	*/
1567	RTDECL(uint64_t) RTVfsFileGetOpenFlags(RTVFSFILE hVfsFile);
1568
1569	/**
1570	* Printf-like write function.
1571	*
1572	* @returns Number of characters written on success, negative error status on
1573	* failure.
1574	* @param hVfsFile The VFS file handle to write to.
1575	* @param pszFormat The format string.
1576	* @param ... Format arguments.
1577	*/
1578	RTDECL(ssize_t) RTVfsFilePrintf(RTVFSFILE hVfsFile, const char *pszFormat, ...);
1579
1580	/**
1581	* Printf-like write function.
1582	*
1583	* @returns Number of characters written on success, negative error status on
1584	* failure.
1585	* @param hVfsFile The VFS file handle to write to.
1586	* @param pszFormat The format string.
1587	* @param va Format arguments.
1588	*/
1589	RTDECL(ssize_t) RTVfsFilePrintfV(RTVFSFILE hVfsFile, const char *pszFormat, va_list va);
1590
1591	/** @} */
1592
1593
1594	#ifdef DEBUG
1595	# undef RTVfsRetain
1596	# define RTVfsRetain(hVfs) RTVfsRetainDebug(hVfs, RT_SRC_POS)
1597	# undef RTVfsObjRetain
1598	# define RTVfsObjRetain(hVfsObj) RTVfsObjRetainDebug(hVfsObj, RT_SRC_POS)
1599	# undef RTVfsDirRetain
1600	# define RTVfsDirRetain(hVfsDir) RTVfsDirRetainDebug(hVfsDir, RT_SRC_POS)
1601	# undef RTVfsFileRetain
1602	# define RTVfsFileRetain(hVfsFile) RTVfsFileRetainDebug(hVfsFile, RT_SRC_POS)
1603	# undef RTVfsIoStrmRetain
1604	# define RTVfsIoStrmRetain(hVfsIos) RTVfsIoStrmRetainDebug(hVfsIos, RT_SRC_POS)
1605	# undef RTVfsFsStrmRetain
1606	# define RTVfsFsStrmRetain(hVfsFss) RTVfsFsStrmRetainDebug(hVfsFss, RT_SRC_POS)
1607	#endif
1608
1609
1610
1611	/** @defgroup grp_rt_vfs_misc VFS Miscellaneous
1612	* @{
1613	*/
1614
1615	/**
1616	* Memorizes the I/O stream as a file backed by memory.
1617	*
1618	* @returns IPRT status code.
1619	*
1620	* @param hVfsIos The VFS I/O stream to memorize. This will be read
1621	* to the end on success, on failure its position is
1622	* undefined.
1623	* @param fFlags A combination of RTFILE_O_READ and RTFILE_O_WRITE.
1624	* @param phVfsFile Where to return the handle to the memory file on
1625	* success.
1626	*/
1627	RTDECL(int) RTVfsMemorizeIoStreamAsFile(RTVFSIOSTREAM hVfsIos, uint32_t fFlags, PRTVFSFILE phVfsFile);
1628
1629	/**
1630	* Creates a VFS file from a memory buffer.
1631	*
1632	* @returns IPRT status code.
1633	*
1634	* @param fFlags A combination of RTFILE_O_READ and RTFILE_O_WRITE.
1635	* @param pvBuf The buffer. This will be copied and not referenced
1636	* after this function returns.
1637	* @param cbBuf The buffer size.
1638	* @param phVfsFile Where to return the handle to the memory file on
1639	* success.
1640	*/
1641	RTDECL(int) RTVfsFileFromBuffer(uint32_t fFlags, void const *pvBuf, size_t cbBuf, PRTVFSFILE phVfsFile);
1642
1643	/**
1644	* Creates a memory backed VFS file object for read and write.
1645	*
1646	* @returns IPRT status code.
1647	*
1648	* @param hVfsIos The VFS I/O stream to memorize. This will be read
1649	* to the end on success, on failure its position is
1650	* undefined.
1651	* @param cbEstimate The estimated file size.
1652	* @param phVfsFile Where to return the handle to the memory file on
1653	* success.
1654	* @sa RTVfsMemIoStrmCreate
1655	*/
1656	RTDECL(int) RTVfsMemFileCreate(RTVFSIOSTREAM hVfsIos, size_t cbEstimate, PRTVFSFILE phVfsFile);
1657
1658	/**
1659	* Creates a memory backed VFS file object for read and write.
1660	*
1661	* @returns IPRT status code.
1662	*
1663	* @param hVfsIos The VFS I/O stream to memorize. This will be read
1664	* to the end on success, on failure its position is
1665	* undefined.
1666	* @param cbEstimate The estimated file size.
1667	* @param phVfsIos Where to return the handle to the memory I/O stream
1668	* on success.
1669	* @sa RTVfsMemFileCreate
1670	*/
1671	RTDECL(int) RTVfsMemIoStrmCreate(RTVFSIOSTREAM hVfsIos, size_t cbEstimate, PRTVFSIOSTREAM phVfsIos);
1672
1673	/**
1674	* Pumps data from one I/O stream to another.
1675	*
1676	* The data is read in chunks from @a hVfsIosSrc and written to @a hVfsIosDst
1677	* until @a hVfsIosSrc indicates end of stream.
1678	*
1679	* @returns IPRT status code
1680	*
1681	* @param hVfsIosSrc The input stream.
1682	* @param hVfsIosDst The output stream.
1683	* @param cbBufHint Hints at a good temporary buffer size, pass 0 if
1684	* clueless.
1685	*/
1686	RTDECL(int) RTVfsUtilPumpIoStreams(RTVFSIOSTREAM hVfsIosSrc, RTVFSIOSTREAM hVfsIosDst, size_t cbBufHint);
1687
1688
1689	/**
1690	* Creates a progress wrapper for an I/O stream.
1691	*
1692	* @returns IRPT status code.
1693	* @param hVfsIos The I/O stream to wrap.
1694	* @param pfnProgress The progress callback. The return code is
1695	* ignored by default, see
1696	* RTVFSPROGRESS_F_CANCELABLE.
1697	* @param pvUser The user argument to @a pfnProgress.
1698	* @param fFlags RTVFSPROGRESS_F_XXX
1699	* @param cbExpectedRead The expected number of bytes read.
1700	* @param cbExpectedWritten The execpted number of bytes written.
1701	* @param phVfsIos Where to return the I/O stream handle.
1702	*/
1703	RTDECL(int) RTVfsCreateProgressForIoStream(RTVFSIOSTREAM hVfsIos, PFNRTPROGRESS pfnProgress, void *pvUser, uint32_t fFlags,
1704	uint64_t cbExpectedRead, uint64_t cbExpectedWritten, PRTVFSIOSTREAM phVfsIos);
1705
1706	/**
1707	* Creates a progress wrapper for a file stream.
1708	*
1709	* @returns IRPT status code.
1710	* @param hVfsFile The file to wrap.
1711	* @param pfnProgress The progress callback. The return code is
1712	* ignored by default, see
1713	* RTVFSPROGRESS_F_CANCELABLE.
1714	* @param pvUser The user argument to @a pfnProgress.
1715	* @param fFlags RTVFSPROGRESS_F_XXX
1716	* @param cbExpectedRead The expected number of bytes read.
1717	* @param cbExpectedWritten The execpted number of bytes written.
1718	* @param phVfsFile Where to return the file handle.
1719	*/
1720	RTDECL(int) RTVfsCreateProgressForFile(RTVFSFILE hVfsFile, PFNRTPROGRESS pfnProgress, void *pvUser, uint32_t fFlags,
1721	uint64_t cbExpectedRead, uint64_t cbExpectedWritten, PRTVFSFILE phVfsFile);
1722
1723	/** @name RTVFSPROGRESS_F_XXX - Flags for RTVfsCreateProcessForIoStream and
1724	* RTVfsCreateProcessForFile.
1725	* @{ */
1726	/** Cancel if the callback returns a failure status code.
1727	* This isn't default behavior because the cancelation is delayed one I/O
1728	* operation in most cases and it's uncertain how the VFS user will handle the
1729	* cancellation status code. */
1730	#define RTVFSPROGRESS_F_CANCELABLE RT_BIT_32(0)
1731	/** Account forward seeks as reads. */
1732	#define RTVFSPROGRESS_F_FORWARD_SEEK_AS_READ RT_BIT_32(1)
1733	/** Account fprward seeks as writes. */
1734	#define RTVFSPROGRESS_F_FORWARD_SEEK_AS_WRITE RT_BIT_32(2)
1735	/** Valid bits. */
1736	#define RTVFSPROGRESS_F_VALID_MASK UINT32_C(0x00000007)
1737	/** @} */
1738
1739
1740	/**
1741	* Create an I/O stream instance performing simple sequential read-ahead.
1742	*
1743	* @returns IPRT status code.
1744	* @param hVfsIos The input stream to perform read ahead on. If this is
1745	* actually for a file object, the returned I/O stream
1746	* handle can also be cast to a file handle.
1747	* @param fFlags Flags reserved for future use, MBZ.
1748	* @param cBuffers How many read ahead buffers to use. Specify 0 for
1749	* default value.
1750	* @param cbBuffer The size of each read ahead buffer. Specify 0 for
1751	* default value.
1752	* @param phVfsIos Where to return the read ahead I/O stream handle.
1753	*
1754	* @remarks Careful using this on a message pipe or socket. The reads are
1755	* performed in blocked mode and it may be host and/or implementation
1756	* dependent whether they will return ready data immediate or wait
1757	* until there's a whole @a cbBuffer (or default) worth ready.
1758	*
1759	* @sa RTVfsCreateReadAheadForFile
1760	*/
1761	RTDECL(int) RTVfsCreateReadAheadForIoStream(RTVFSIOSTREAM hVfsIos, uint32_t fFlags, uint32_t cBuffers, uint32_t cbBuffer,
1762	PRTVFSIOSTREAM phVfsIos);
1763
1764	/**
1765	* Create an I/O stream instance performing simple sequential read-ahead.
1766	*
1767	* @returns IPRT status code.
1768	* @param hVfsFile The input file to perform read ahead on.
1769	* @param fFlags Flags reserved for future use, MBZ.
1770	* @param cBuffers How many read ahead buffers to use. Specify 0 for
1771	* default value.
1772	* @param cbBuffer The size of each read ahead buffer. Specify 0 for
1773	* default value.
1774	* @param phVfsFile Where to return the read ahead file handle.
1775	* @sa RTVfsCreateReadAheadForIoStream
1776	*/
1777	RTDECL(int) RTVfsCreateReadAheadForFile(RTVFSFILE hVfsFile, uint32_t fFlags, uint32_t cBuffers, uint32_t cbBuffer,
1778	PRTVFSFILE phVfsFile);
1779
1780
1781	/**
1782	* Create a file system stream for writing to a directory.
1783	*
1784	* This is just supposed to be a drop in replacement for the TAR creator stream
1785	* that instead puts the files and stuff in a directory instead of a TAR
1786	* archive. In addition, it has an undo feature for simplying cleaning up after
1787	* a botched run
1788	*
1789	* @returns IPRT status code.
1790	* @param hVfsBaseDir The base directory.
1791	* @param fFlags RTVFSFSS2DIR_F_XXX
1792	* @param phVfsFss Where to return the FSS handle.
1793	* @sa RTVfsFsStrmToNormalDir, RTVfsFsStrmToDirUndo
1794	*/
1795	RTDECL(int) RTVfsFsStrmToDir(RTVFSDIR hVfsBaseDir, uint32_t fFlags, PRTVFSFSSTREAM phVfsFss);
1796
1797	/**
1798	* Create a file system stream for writing to a normal directory.
1799	*
1800	* This is just supposed to be a drop in replacement for the TAR creator stream
1801	* that instead puts the files and stuff in a directory instead of a TAR
1802	* archive. In addition, it has an undo feature for simplying cleaning up after
1803	* a botched run
1804	*
1805	* @returns IPRT status code.
1806	* @param pszBaseDir The base directory. Must exist.
1807	* @param fFlags RTVFSFSS2DIR_F_XXX
1808	* @param phVfsFss Where to return the FSS handle.
1809	* @sa RTVfsFsStrmToDir, RTVfsFsStrmToDirUndo
1810	*/
1811	RTDECL(int) RTVfsFsStrmToNormalDir(const char *pszBaseDir, uint32_t fFlags, PRTVFSFSSTREAM phVfsFss);
1812
1813	/** @name RTVFSFSS2DIR_F_XXX - Flags for RTVfsFsStrmToNormalDir
1814	* @{ */
1815	/** Overwrite existing files (default is to not overwrite anything). */
1816	#define RTVFSFSS2DIR_F_OVERWRITE_FILES RT_BIT_32(0)
1817	/** Valid bits. */
1818	#define RTVFSFSS2DIR_F_VALID_MASK UINT32_C(0x00000001)
1819	/** @} */
1820
1821	/**
1822	* Deletes files, directories, symlinks and stuff created by a FSS returned by
1823	* RTVfsFsStrmToNormalDir or RTVfsFsStrmToDir.
1824	*
1825	* @returns IPRT status code.
1826	* @param hVfsFss The write-to-directory FSS handle.
1827	*/
1828	RTDECL(int) RTVfsFsStrmToDirUndo(RTVFSFSSTREAM hVfsFss);
1829
1830
1831
1832	/** @} */
1833
1834
1835	/** @defgroup grp_rt_vfs_chain VFS Chains
1836	*
1837	* VFS chains is for doing pipe like things with VFS objects from the command
1838	* line. Imagine you want to cat the readme.gz of an ISO you could do
1839	* something like:
1840	* RTCat :iprtvfs:file(stdfile,live.iso)\|vfs(isofs)\|iso(open,readme.gz)\|ios(gunzip)
1841	* or
1842	* RTCat :iprtvfs:file(stdfile,live.iso)\|ios(isofs,readme.gz)\|ios(gunzip)
1843	*
1844	* Or say you want to read the README.TXT on a floppy image:
1845	* RTCat :iprtvfs:file(stdfile,floppy.img,r)\|vfs(fat)\|ios(open,README.TXT)
1846	* or
1847	* RTCat :iprtvfs:file(stdfile,floppy.img,r)\|vfs(fat)\|README.TXT
1848	*
1849	* Or in the other direction, you want to write a STUFF.TGZ file to the above
1850	* floppy image, using a lazy writer thread for compressing the data:
1851	* RTTar cf :iprtvfs:file(stdfile,floppy.img,rw)\|ios(fat,STUFF.TGZ)\|ios(gzip)\|ios(push) .
1852	*
1853	*
1854	* A bit more formally:
1855	* :iprtvfs:{type}({provider}[,provider-args])[{separator}{type}...][{separator}{path}]
1856	*
1857	* The @c type refers to VFS object that should be created by the @c provider.
1858	* Valid types:
1859	* - vfs: A virtual file system (volume).
1860	* - fss: A file system stream (e.g. tar).
1861	* - ios: An I/O stream.
1862	* - file: A file.
1863	* - dir: A directory.
1864	* - sym: A symbolic link (not sure how useful this is).
1865	*
1866	* The @c provider refers to registered chain element providers (see
1867	* RTVFSCHAINELEMENTREG for how that works internally). These are asked to
1868	* create a VFS object of the specified type using the given arguments (if any).
1869	* Default providers:
1870	* - std: Standard file, directory and file system.
1871	* - open: Opens a file, I/O stream or directory in a vfs or directory object.
1872	* - pull: Read-ahead buffering thread on file or I/O stream.
1873	* - push: Lazy-writer buffering thread on file or I/O stream.
1874	* - gzip: Compresses an I/O stream.
1875	* - gunzip: Decompresses an I/O stream.
1876	* - fat: FAT file system accessor.
1877	* - isofs: ISOFS file system accessor.
1878	*
1879	* As element @c separator we allow both colon (':') and the pipe character
1880	* ('\|'). The latter the conventional one, but since it's inconvenient on the
1881	* command line, colon is provided as an alternative.
1882	*
1883	* In the final element we allow a simple @a path to be specified instead of the
1884	* type-provider-arguments stuff. The previous object must be a directory, file
1885	* system or file system stream. The application will determin exactly which
1886	* operation or operations which will be performed.
1887	*
1888	* @{
1889	*/
1890
1891	/** The path prefix used to identify an VFS chain specification. */
1892	#define RTVFSCHAIN_SPEC_PREFIX ":iprtvfs:"
1893
1894	RTDECL(int) RTVfsChainOpenVfs(const char pszSpec, PRTVFS phVfs, uint32_t poffError, PRTERRINFO pErrInfo);
1895	RTDECL(int) RTVfsChainOpenFsStream(const char pszSpec, PRTVFSFSSTREAM phVfsFss, uint32_t poffError, PRTERRINFO pErrInfo);
1896
1897	/**
1898	* Opens any kind of file system object.
1899	*
1900	* @returns IPRT status code.
1901	* @param pszSpec The VFS chain specification or plain path.
1902	* @param fFileOpen RTFILE_O_XXX flags.
1903	* @param fObjFlags More flags: RTVFSOBJ_F_XXX, RTPATH_F_XXX.
1904	* @param phVfsObj Where to return the handle to the opened object.
1905	* @param poffError Where to on error return an offset into @a pszSpec
1906	* of what cause the error. Optional.
1907	* @param pErrInfo Where to return additional error information.
1908	* Optional.
1909	*/
1910	RTDECL(int) RTVfsChainOpenObj(const char *pszSpec, uint64_t fFileOpen, uint32_t fObjFlags,
1911	PRTVFSOBJ phVfsObj, uint32_t *poffError, PRTERRINFO pErrInfo);
1912
1913	RTDECL(int) RTVfsChainOpenDir(const char pszSpec, uint32_t fOpen, PRTVFSDIR phVfsDir, uint32_t poffError, PRTERRINFO pErrInfo);
1914	RTDECL(int) RTVfsChainOpenParentDir(const char pszSpec, uint32_t fOpen, PRTVFSDIR phVfsDir, const char *ppszChild,
1915	uint32_t *poffError, PRTERRINFO pErrInfo);
1916	RTDECL(int) RTVfsChainOpenFile(const char pszSpec, uint64_t fOpen, PRTVFSFILE phVfsFile, uint32_t poffError, PRTERRINFO pErrInfo);
1917	RTDECL(int) RTVfsChainOpenIoStream(const char pszSpec, uint64_t fOpen, PRTVFSIOSTREAM phVfsIos, uint32_t poffError, PRTERRINFO pErrInfo);
1918	RTDECL(int) RTVfsChainOpenSymlink(const char pszSpec, PRTVFSSYMLINK phVfsSym, uint32_t poffError, PRTERRINFO pErrInfo);
1919
1920	RTDECL(int) RTVfsChainQueryInfo(const char *pszSpec, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAdditionalAttribs,
1921	uint32_t fFlags, uint32_t *poffError, PRTERRINFO pErrInfo);
1922
1923	/**
1924	* Tests if the given string is a chain specification or not.
1925	*
1926	* @returns true if it is, false if it isn't.
1927	* @param pszSpec The alleged chain spec.
1928	*/
1929	RTDECL(bool) RTVfsChainIsSpec(const char *pszSpec);
1930
1931	/**
1932	* Queries the path from the final element.
1933	*
1934	* @returns IPRT status code.
1935	* @retval VERR_VFS_CHAIN_NOT_PATH_ONLY if the final element isn't just a
1936	* simple path.
1937	* @param pszSpec The chain spec.
1938	* @param ppszFinalPath Where to return a copy of the final path on success.
1939	* Call RTStrFree when done.
1940	* @param poffError Where to on error return an offset into @a pszSpec
1941	* of what cause the error. Optional.
1942	*
1943	*/
1944	RTDECL(int) RTVfsChainQueryFinalPath(const char pszSpec, char ppszFinalPath, uint32_t poffError);
1945
1946	/**
1947	* Splits the given chain spec into a final path and the preceeding spec.
1948	*
1949	* This works on plain paths too.
1950	*
1951	* @returns IPRT status code.
1952	* @param pszSpec The chain spec to split. This will be modified!
1953	* @param ppszSpec Where to return the pointer to the chain spec part.
1954	* This is set to NULL if it's a plain path or a chain
1955	* spec with only a final-path element.
1956	* @param ppszFinalPath Where to return the pointer to the final path. This
1957	* is set to NULL if no final path.
1958	* @param poffError Where to on error return an offset into @a pszSpec
1959	* of what cause the error. Optional.
1960	*/
1961	RTDECL(int) RTVfsChainSplitOffFinalPath(char pszSpec, char ppszSpec, char ppszFinalPath, uint32_t poffError);
1962
1963	/**
1964	* Common code for reporting errors of a RTVfsChainOpen* API.
1965	*
1966	* @param pszFunction The API called.
1967	* @param pszSpec The VFS chain specification or file path passed to the.
1968	* @param rc The return code.
1969	* @param offError The error offset value returned (0 if not captured).
1970	* @param pErrInfo Additional error information. Optional.
1971	*
1972	* @sa RTVfsChainMsgErrorExitFailure
1973	* @sa RTVfsChainOpenVfs, RTVfsChainOpenFsStream, RTVfsChainOpenDir,
1974	* RTVfsChainOpenFile, RTVfsChainOpenIoStream, RTVfsChainOpenSymlink
1975	*/
1976	RTDECL(void) RTVfsChainMsgError(const char pszFunction, const char pszSpec, int rc, uint32_t offError, PRTERRINFO pErrInfo);
1977
1978	/**
1979	* Common code for reporting errors of a RTVfsChainOpen* API.
1980	*
1981	* @returns RTEXITCODE_FAILURE
1982	*
1983	* @param pszFunction The API called.
1984	* @param pszSpec The VFS chain specification or file path passed to the.
1985	* @param rc The return code.
1986	* @param offError The error offset value returned (0 if not captured).
1987	* @param pErrInfo Additional error information. Optional.
1988	*
1989	* @sa RTVfsChainMsgError
1990	* @sa RTVfsChainOpenVfs, RTVfsChainOpenFsStream, RTVfsChainOpenDir,
1991	* RTVfsChainOpenFile, RTVfsChainOpenIoStream, RTVfsChainOpenSymlink
1992	*/
1993	RTDECL(RTEXITCODE) RTVfsChainMsgErrorExitFailure(const char pszFunction, const char pszSpec,
1994	int rc, uint32_t offError, PRTERRINFO pErrInfo);
1995
1996
1997	/** @} */
1998
1999
2000	/** @} */
2001
2002	RT_C_DECLS_END
2003
2004	#endif /* !IPRT_INCLUDED_vfs_h */
2005

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