| 1 | /** @file
|
|---|
| 2 | * IPRT - Virtual Filesystem.
|
|---|
| 3 | */
|
|---|
| 4 |
|
|---|
| 5 | /*
|
|---|
| 6 | * Copyright (C) 2010 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_vfs_h
|
|---|
| 27 | #define ___iprt_vfs_h
|
|---|
| 28 |
|
|---|
| 29 | #include <iprt/cdefs.h>
|
|---|
| 30 | #include <iprt/types.h>
|
|---|
| 31 | #include <iprt/dir.h>
|
|---|
| 32 | #include <iprt/fs.h>
|
|---|
| 33 | #include <iprt/symlink.h>
|
|---|
| 34 | #include <iprt/sg.h>
|
|---|
| 35 | #include <iprt/time.h>
|
|---|
| 36 |
|
|---|
| 37 |
|
|---|
| 38 | RT_C_DECLS_BEGIN
|
|---|
| 39 |
|
|---|
| 40 | /** @defgroup grp_rt_fs RTVfs - Virtual Filesystem
|
|---|
| 41 | * @ingroup grp_rt
|
|---|
| 42 | *
|
|---|
| 43 | * The virtual filesystem APIs are intended to make it possible to work on
|
|---|
| 44 | * container files, file system sub-trees, file system overlays and other custom
|
|---|
| 45 | * filesystem configurations. It also makes it possible to create filters, like
|
|---|
| 46 | * automatically gunzipping a tar.gz file before feeding it to the RTTar API for
|
|---|
| 47 | * unpacking - or wise versa.
|
|---|
| 48 | *
|
|---|
| 49 | * The virtual filesystem APIs are intended to mirror the RTDir, RTFile, RTPath
|
|---|
| 50 | * and RTFs APIs pretty closely so that rewriting a piece of code to work with
|
|---|
| 51 | * it should be easy. However there are some differences to the way the APIs
|
|---|
| 52 | * works and the user should heed the documentation. The differences are
|
|---|
| 53 | * usually motivated by simplification and in some case to make the VFS more
|
|---|
| 54 | * flexible.
|
|---|
| 55 | *
|
|---|
| 56 | * @{
|
|---|
| 57 | */
|
|---|
| 58 |
|
|---|
| 59 | /** Virtual Filesystem handle. */
|
|---|
| 60 | typedef struct RTVFSINTERNAL *RTVFS;
|
|---|
| 61 | /** Pointer to a VFS handle. */
|
|---|
| 62 | typedef RTVFS *PRTVFS;
|
|---|
| 63 | /** A NIL VFS handle. */
|
|---|
| 64 | #define NIL_RTVFS ((RTVFS)~(uintptr_t)0)
|
|---|
| 65 |
|
|---|
| 66 | /** Virtual Filesystem base object handle. */
|
|---|
| 67 | typedef struct RTVFSOBJINTERNAL *RTVFSOBJ;
|
|---|
| 68 | /** Pointer to a VFS base object handle. */
|
|---|
| 69 | typedef RTVFSOBJ *PRTVFSOBJ;
|
|---|
| 70 | /** A NIL VFS base object handle. */
|
|---|
| 71 | #define NIL_RTVFSOBJ ((RTVFSOBJ)~(uintptr_t)0)
|
|---|
| 72 |
|
|---|
| 73 | /** Virtual Filesystem directory handle. */
|
|---|
| 74 | typedef struct RTVFSDIRINTERNAL *RTVFSDIR;
|
|---|
| 75 | /** Pointer to a VFS directory handle. */
|
|---|
| 76 | typedef RTVFSDIR *PRTVFSDIR;
|
|---|
| 77 | /** A NIL VFS directory handle. */
|
|---|
| 78 | #define NIL_RTVFSDIR ((RTVFSDIR)~(uintptr_t)0)
|
|---|
| 79 |
|
|---|
| 80 | /** Virtual Filesystem filesystem stream handle. */
|
|---|
| 81 | typedef struct RTVFSFSSTREAMINTERNAL *RTVFSFSSTREAM;
|
|---|
| 82 | /** Pointer to a VFS filesystem stream handle. */
|
|---|
| 83 | typedef RTVFSFSSTREAM *PRTVFSFSSTREAM;
|
|---|
| 84 | /** A NIL VFS filesystem stream handle. */
|
|---|
| 85 | #define NIL_RTVFSFSSTREAM ((RTVFSFSSTREAM)~(uintptr_t)0)
|
|---|
| 86 |
|
|---|
| 87 | /** Virtual Filesystem I/O stream handle. */
|
|---|
| 88 | typedef struct RTVFSIOSTREAMINTERNAL *RTVFSIOSTREAM;
|
|---|
| 89 | /** Pointer to a VFS I/O stream handle. */
|
|---|
| 90 | typedef RTVFSIOSTREAM *PRTVFSIOSTREAM;
|
|---|
| 91 | /** A NIL VFS I/O stream handle. */
|
|---|
| 92 | #define NIL_RTVFSIOSTREAM ((RTVFSIOSTREAM)~(uintptr_t)0)
|
|---|
| 93 |
|
|---|
| 94 | /** Virtual Filesystem file handle. */
|
|---|
| 95 | typedef struct RTVFSFILEINTERNAL *RTVFSFILE;
|
|---|
| 96 | /** Pointer to a VFS file handle. */
|
|---|
| 97 | typedef RTVFSFILE *PRTVFSFILE;
|
|---|
| 98 | /** A NIL VFS file handle. */
|
|---|
| 99 | #define NIL_RTVFSFILE ((RTVFSFILE)~(uintptr_t)0)
|
|---|
| 100 |
|
|---|
| 101 | /** Virtual Filesystem symbolic link handle. */
|
|---|
| 102 | typedef struct RTVFSSYMLINKINTERNAL *RTVFSSYMLINK;
|
|---|
| 103 | /** Pointer to a VFS symbolic link handle. */
|
|---|
| 104 | typedef RTVFSSYMLINK *PRTVFSSYMLINK;
|
|---|
| 105 | /** A NIL VFS symbolic link handle. */
|
|---|
| 106 | #define NIL_RTVFSSYMLINK ((RTVFSSYMLINK)~(uintptr_t)0)
|
|---|
| 107 |
|
|---|
| 108 |
|
|---|
| 109 | /** @name RTVfsCreate flags
|
|---|
| 110 | * @{ */
|
|---|
| 111 | /** Whether the file system is read-only. */
|
|---|
| 112 | #define RTVFS_C_READONLY RT_BIT(0)
|
|---|
| 113 | /** Whether we the VFS should be thread safe (i.e. automaticaly employ
|
|---|
| 114 | * locks). */
|
|---|
| 115 | #define RTVFS_C_THREAD_SAFE RT_BIT(1)
|
|---|
| 116 | /** @} */
|
|---|
| 117 |
|
|---|
| 118 | /**
|
|---|
| 119 | * Creates an empty virtual filesystem.
|
|---|
| 120 | *
|
|---|
| 121 | * @returns IPRT status code.
|
|---|
| 122 | * @param pszName Name, for logging and such.
|
|---|
| 123 | * @param fFlags Flags, MBZ.
|
|---|
| 124 | * @param phVfs Where to return the VFS handle. Release the returned
|
|---|
| 125 | * reference by calling RTVfsRelease.
|
|---|
| 126 | */
|
|---|
| 127 | RTDECL(int) RTVfsCreate(const char *pszName, uint32_t fFlags, PRTVFS phVfs);
|
|---|
| 128 | RTDECL(uint32_t) RTVfsRetain(RTVFS phVfs);
|
|---|
| 129 | RTDECL(uint32_t) RTVfsRelease(RTVFS phVfs);
|
|---|
| 130 | RTDECL(int) RTVfsAttach(RTVFS hVfs, const char *pszMountPoint, uint32_t fFlags, RTVFS hVfsAttach);
|
|---|
| 131 | RTDECL(int) RTVfsDetach(RTVFS hVfs, const char *pszMountPoint, RTVFS hVfsToDetach, PRTVFS *phVfsDetached);
|
|---|
| 132 | RTDECL(uint32_t) RTVfsGetAttachmentCount(RTVFS hVfs);
|
|---|
| 133 | RTDECL(int) RTVfsGetAttachment(RTVFS hVfs, uint32_t iOrdinal, PRTVFS *phVfsAttached, uint32_t *pfFlags,
|
|---|
| 134 | char *pszMountPoint, size_t cbMountPoint);
|
|---|
| 135 |
|
|---|
| 136 |
|
|---|
| 137 | /** @defgroup grp_vfs_dir VFS Directory API
|
|---|
| 138 | * @{
|
|---|
| 139 | */
|
|---|
| 140 |
|
|---|
| 141 | RTDECL(RTVFS) RTVfsObjToVfs(RTVFSOBJ hVfsObj);
|
|---|
| 142 | RTDECL(RTVFSFSSTREAM) RTVfsObjToFsStream(RTVFSOBJ hVfsObj);
|
|---|
| 143 | RTDECL(RTVFSDIR) RTVfsObjToDir(RTVFSOBJ hVfsObj);
|
|---|
| 144 | RTDECL(RTVFSIOSTREAM) RTVfsObjToIoStream(RTVFSOBJ hVfsObj);
|
|---|
| 145 | RTDECL(RTVFSFILE) RTVfsObjToFile(RTVFSOBJ hVfsObj);
|
|---|
| 146 | RTDECL(RTVFSSYMLINK) RTVfsObjToSymlink(RTVFSOBJ hVfsObj);
|
|---|
| 147 |
|
|---|
| 148 | RTDECL(RTVFSOBJ) RTVfsObjFromVfs(RTVFS hVfs);
|
|---|
| 149 | RTDECL(RTVFSOBJ) RTVfsObjFromFsStream(RTVFSFSSTREAM hVfsFss);
|
|---|
| 150 | RTDECL(RTVFSOBJ) RTVfsObjFromDir(RTVFSDIR hVfsDir);
|
|---|
| 151 | RTDECL(RTVFSOBJ) RTVfsObjFromIoStream(RTVFSIOSTREAM hVfsIos);
|
|---|
| 152 | RTDECL(RTVFSOBJ) RTVfsObjFromFile(RTVFSFILE hVfsFile);
|
|---|
| 153 | RTDECL(RTVFSOBJ) RTVfsObjFromSymlink(RTVFSSYMLINK hVfsSym);
|
|---|
| 154 |
|
|---|
| 155 | /** @} */
|
|---|
| 156 |
|
|---|
| 157 |
|
|---|
| 158 | /** @defgroup grp_vfs_dir VFS Directory API
|
|---|
| 159 | * @{
|
|---|
| 160 | */
|
|---|
| 161 |
|
|---|
| 162 | /**
|
|---|
| 163 | * Retains a reference to the VFS directory handle.
|
|---|
| 164 | *
|
|---|
| 165 | * @returns New reference count on success, UINT32_MAX on failure.
|
|---|
| 166 | * @param hVfsDir The VFS directory handle.
|
|---|
| 167 | */
|
|---|
| 168 | RTDECL(uint32_t) RTVfsDirRetain(RTVFSDIR hVfsDir);
|
|---|
| 169 |
|
|---|
| 170 | /**
|
|---|
| 171 | * Releases a reference to the VFS directory handle.
|
|---|
| 172 | *
|
|---|
| 173 | * @returns New reference count on success (0 if closed), UINT32_MAX on failure.
|
|---|
| 174 | * @param hVfsIos The VFS directory handle.
|
|---|
| 175 | */
|
|---|
| 176 | RTDECL(uint32_t) RTVfsDirRelease(RTVFSDIR hVfsDir);
|
|---|
| 177 |
|
|---|
| 178 | /** @} */
|
|---|
| 179 |
|
|---|
| 180 |
|
|---|
| 181 | /** @defgroup grp_vfs_iostream VFS Symbolic Link API
|
|---|
| 182 | * @{
|
|---|
| 183 | */
|
|---|
| 184 |
|
|---|
| 185 | /**
|
|---|
| 186 | * Read the symbolic link target.
|
|---|
| 187 | *
|
|---|
| 188 | * @returns IPRT status code.
|
|---|
| 189 | * @param hVfsSym The VFS symbolic link handle.
|
|---|
| 190 | * @param pszTarget The target buffer.
|
|---|
| 191 | * @param cbTarget The size of the target buffer.
|
|---|
| 192 | * @sa RTSymlinkRead
|
|---|
| 193 | */
|
|---|
| 194 | RTDECL(int) RTVfsSymlinkRead(RTVFSSYMLINK hVfsSym, char *pszTarget, size_t cbTarget);
|
|---|
| 195 |
|
|---|
| 196 | /** @} */
|
|---|
| 197 |
|
|---|
| 198 |
|
|---|
| 199 |
|
|---|
| 200 | /** @defgroup grp_vfs_iostream VFS I/O Stream API
|
|---|
| 201 | * @{
|
|---|
| 202 | */
|
|---|
| 203 |
|
|---|
| 204 | /**
|
|---|
| 205 | * Retains a reference to the VFS I/O stream handle.
|
|---|
| 206 | *
|
|---|
| 207 | * @returns New reference count on success, UINT32_MAX on failure.
|
|---|
| 208 | * @param hVfsIos The VFS I/O stream handle.
|
|---|
| 209 | */
|
|---|
| 210 | RTDECL(uint32_t) RTVfsIoStrmRetain(RTVFSIOSTREAM hVfsIos);
|
|---|
| 211 |
|
|---|
| 212 | /**
|
|---|
| 213 | * Releases a reference to the VFS I/O stream handle.
|
|---|
| 214 | *
|
|---|
| 215 | * @returns New reference count on success (0 if closed), UINT32_MAX on failure.
|
|---|
| 216 | * @param hVfsIos The VFS I/O stream handle.
|
|---|
| 217 | */
|
|---|
| 218 | RTDECL(uint32_t) RTVfsIoStrmRelease(RTVFSIOSTREAM hVfsIos);
|
|---|
| 219 |
|
|---|
| 220 | /**
|
|---|
| 221 | * Convert the VFS I/O stream handle to a VFS file handle.
|
|---|
| 222 | *
|
|---|
| 223 | * @returns The VFS file handle on success, this must be released.
|
|---|
| 224 | * NIL_RTVFSFILE if the I/O stream handle is invalid.
|
|---|
| 225 | * @param hVfsIos The VFS I/O stream handle.
|
|---|
| 226 | * @sa RTVfsFileToIoStream
|
|---|
| 227 | */
|
|---|
| 228 | RTDECL(RTVFSFILE) RTVfsIoStrmToFile(RTVFSIOSTREAM hVfsIos);
|
|---|
| 229 |
|
|---|
| 230 | /**
|
|---|
| 231 | * Query information about the I/O stream.
|
|---|
| 232 | *
|
|---|
| 233 | * @returns IPRT status code.
|
|---|
| 234 | * @param hVfsIos The VFS I/O stream handle.
|
|---|
| 235 | * @param pObjInfo Where to return the info.
|
|---|
| 236 | * @param enmAddAttr Which additional attributes should be retrieved.
|
|---|
| 237 | * @sa RTFileQueryInfo
|
|---|
| 238 | */
|
|---|
| 239 | RTDECL(int) RTVfsIoStrmQueryInfo(RTVFSIOSTREAM hVfsIos, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr);
|
|---|
| 240 |
|
|---|
| 241 | /**
|
|---|
| 242 | * Read bytes from the I/O stream.
|
|---|
| 243 | *
|
|---|
| 244 | * @returns IPRT status code.
|
|---|
| 245 | * @param hVfsIos The VFS I/O stream handle.
|
|---|
| 246 | * @param pvBuf Where to store the read bytes.
|
|---|
| 247 | * @param cbToRead The number of bytes to read.
|
|---|
| 248 | * @param pcbRead Where to always store the number of bytes actually
|
|---|
| 249 | * read. If this is NULL, the call will block until
|
|---|
| 250 | * @a cbToRead bytes are available. If this is
|
|---|
| 251 | * non-NULL, the call will not block and return what
|
|---|
| 252 | * is currently avaiable.
|
|---|
| 253 | * @sa RTFileRead, RTPipeRead, RTPipeReadBlocking, RTSocketRead
|
|---|
| 254 | */
|
|---|
| 255 | RTDECL(int) RTVfsIoStrmRead(RTVFSIOSTREAM hVfsIos, void *pvBuf, size_t cbToRead, size_t *pcbRead);
|
|---|
| 256 |
|
|---|
| 257 | /**
|
|---|
| 258 | * Write bytes to the I/O stream.
|
|---|
| 259 | *
|
|---|
| 260 | * @returns IPRT status code.
|
|---|
| 261 | * @param hVfsIos The VFS I/O stream handle.
|
|---|
| 262 | * @param pvBuf The bytes to write.
|
|---|
| 263 | * @param cbToWrite The number of bytes to write.
|
|---|
| 264 | * @param pcbWritten Where to always store the number of bytes actually
|
|---|
| 265 | * written. If this is NULL, the call will block
|
|---|
| 266 | * until
|
|---|
| 267 | * @a cbToWrite bytes are available. If this is
|
|---|
| 268 | * non-NULL, the call will not block and return after
|
|---|
| 269 | * writing what is possible.
|
|---|
| 270 | * @sa RTFileWrite, RTPipeWrite, RTPipeWriteBlocking, RTSocketWrite
|
|---|
| 271 | */
|
|---|
| 272 | RTDECL(int) RTVfsIoStrmWrite(RTVFSIOSTREAM hVfsIos, const void *pvBuf, size_t cbToWrite, size_t *pcbWritten);
|
|---|
| 273 |
|
|---|
| 274 | /**
|
|---|
| 275 | * Reads bytes from the I/O stream into a scatter buffer.
|
|---|
| 276 | *
|
|---|
| 277 | * @returns IPRT status code.
|
|---|
| 278 | * @retval VINF_SUCCESS and the number of bytes read written to @a pcbRead.
|
|---|
| 279 | * @retval VINF_TRY_AGAIN if @a fBlocking is @c false, @a pcbRead is not NULL,
|
|---|
| 280 | * and no data was available. @a *pcbRead will be set to 0.
|
|---|
| 281 | * @retval VINF_EOF when trying to read __beyond__ the end of the stream and
|
|---|
| 282 | * @a pcbRead is not NULL (it will be set to the number of bytes read,
|
|---|
| 283 | * or 0 if the end of the stream was reached before this call).
|
|---|
| 284 | * When the last byte of the read request is the last byte in the
|
|---|
| 285 | * stream, this status code will not be used. However, VINF_EOF is
|
|---|
| 286 | * returned when attempting to read 0 bytes while standing at the end
|
|---|
| 287 | * of the stream.
|
|---|
| 288 | * @retval VERR_EOF when trying to read __beyond__ the end of the stream and
|
|---|
| 289 | * @a pcbRead is NULL.
|
|---|
| 290 | *
|
|---|
| 291 | * @param hVfsIos The VFS I/O stream handle.
|
|---|
| 292 | * @param pSgBuf Pointer to a scatter buffer descriptor. The number
|
|---|
| 293 | * of bytes described by the segments is what will be
|
|---|
| 294 | * attemted read.
|
|---|
| 295 | * @param fBlocking Whether the call is blocking (@c true) or not. If
|
|---|
| 296 | * not, the @a pcbRead parameter must not be NULL.
|
|---|
| 297 | * @param pcbRead Where to always store the number of bytes actually
|
|---|
| 298 | * read. This can be NULL if @a fBlocking is true.
|
|---|
| 299 | * @sa RTFileSgRead, RTSocketSgRead, RTPipeRead, RTPipeReadBlocking
|
|---|
| 300 | */
|
|---|
| 301 | RTDECL(int) RTVfsIoStrmSgRead(RTVFSIOSTREAM hVfsIos, PCRTSGBUF pSgBuf, bool fBlocking, size_t *pcbRead);
|
|---|
| 302 |
|
|---|
| 303 | /**
|
|---|
| 304 | * Write bytes to the I/O stream from a gather buffer.
|
|---|
| 305 | *
|
|---|
| 306 | * @returns IPRT status code.
|
|---|
| 307 | * @param hVfsIos The VFS I/O stream handle.
|
|---|
| 308 | * @param pSgBuf Pointer to a gather buffer descriptor. The number
|
|---|
| 309 | * of bytes described by the segments is what will be
|
|---|
| 310 | * attemted written.
|
|---|
| 311 | * @param fBlocking Whether the call is blocking (@c true) or not. If
|
|---|
| 312 | * not, the @a pcbWritten parameter must not be NULL.
|
|---|
| 313 | * @param pcbRead Where to always store the number of bytes actually
|
|---|
| 314 | * written. This can be NULL if @a fBlocking is true.
|
|---|
| 315 | * @sa RTFileSgWrite, RTSocketSgWrite
|
|---|
| 316 | */
|
|---|
| 317 | RTDECL(int) RTVfsIoStrmSgWrite(RTVFSIOSTREAM hVfsIos, PCRTSGBUF pSgBuf, bool fBlocking, size_t *pcbWritten);
|
|---|
| 318 |
|
|---|
| 319 | /**
|
|---|
| 320 | * Flush any buffered data to the I/O stream.
|
|---|
| 321 | *
|
|---|
| 322 | * @returns IPRT status code.
|
|---|
| 323 | * @param hVfsIos The VFS I/O stream handle.
|
|---|
| 324 | * @sa RTFileFlush, RTPipeFlush
|
|---|
| 325 | */
|
|---|
| 326 | RTDECL(int) RTVfsIoStrmFlush(RTVFSIOSTREAM hVfsIos);
|
|---|
| 327 |
|
|---|
| 328 | /**
|
|---|
| 329 | * Poll for events.
|
|---|
| 330 | *
|
|---|
| 331 | * @returns IPRT status code.
|
|---|
| 332 | * @param hVfsIos The VFS I/O stream handle.
|
|---|
| 333 | * @param fEvents The events to poll for (RTPOLL_EVT_XXX).
|
|---|
| 334 | * @param cMillies How long to wait for event to eventuate.
|
|---|
| 335 | * @param fIntr Whether the wait is interruptible and can return
|
|---|
| 336 | * VERR_INTERRUPTED (@c true) or if this condition
|
|---|
| 337 | * should be hidden from the caller (@c false).
|
|---|
| 338 | * @param pfRetEvents Where to return the event mask.
|
|---|
| 339 | * @sa RTPollSetAdd, RTPoll, RTPollNoResume.
|
|---|
| 340 | */
|
|---|
| 341 | RTDECL(RTFOFF) RTVfsIoStrmPoll(RTVFSIOSTREAM hVfsIos, uint32_t fEvents, RTMSINTERVAL cMillies, bool fIntr,
|
|---|
| 342 | uint32_t *pfRetEvents);
|
|---|
| 343 | /**
|
|---|
| 344 | * Tells the current I/O stream position.
|
|---|
| 345 | *
|
|---|
| 346 | * @returns Zero or higher - where to return the I/O stream offset. Values
|
|---|
| 347 | * below zero are IPRT status codes (VERR_XXX).
|
|---|
| 348 | * @param hVfsIos The VFS I/O stream handle.
|
|---|
| 349 | * @sa RTFileTell
|
|---|
| 350 | */
|
|---|
| 351 | RTDECL(RTFOFF) RTVfsIoStrmTell(RTVFSIOSTREAM hVfsIos);
|
|---|
| 352 |
|
|---|
| 353 | /**
|
|---|
| 354 | * Skips @a cb ahead in the stream.
|
|---|
| 355 | *
|
|---|
| 356 | * @returns IPRT status code.
|
|---|
| 357 | * @param hVfsIos The VFS I/O stream handle.
|
|---|
| 358 | * @param cb The number bytes to skip.
|
|---|
| 359 | */
|
|---|
| 360 | RTDECL(int) RTVfsIoStrmSkip(RTVFSIOSTREAM hVfsIos, RTFOFF cb);
|
|---|
| 361 |
|
|---|
| 362 | /**
|
|---|
| 363 | * Fills the stream with @a cb zeros.
|
|---|
| 364 | *
|
|---|
| 365 | * @returns IPRT status code.
|
|---|
| 366 | * @param hVfsIos The VFS I/O stream handle.
|
|---|
| 367 | * @param cb The number of zero bytes to insert.
|
|---|
| 368 | */
|
|---|
| 369 | RTDECL(int) RTVfsIoStrmZeroFill(RTVFSIOSTREAM hVfsIos, RTFOFF cb);
|
|---|
| 370 | /** @} */
|
|---|
| 371 |
|
|---|
| 372 |
|
|---|
| 373 | /** @defgroup grp_vfs_file VFS File API
|
|---|
| 374 | * @{
|
|---|
| 375 | */
|
|---|
| 376 | RTDECL(int) RTVfsFileOpen(RTVFS hVfs, const char *pszFilename, uint32_t fOpen, PRTVFSFILE phVfsFile);
|
|---|
| 377 |
|
|---|
| 378 | /**
|
|---|
| 379 | * Create a VFS file handle from a standard IPRT file handle (RTFILE).
|
|---|
| 380 | *
|
|---|
| 381 | * @returns IPRT status code.
|
|---|
| 382 | * @param hFile The standard IPRT file handle.
|
|---|
| 383 | * @param fOpen The flags the handle was opened with. Pass 0 to
|
|---|
| 384 | * have these detected.
|
|---|
| 385 | * @param fLeaveOpen Whether to leave the handle open when the VFS file
|
|---|
| 386 | * is released, or to close it (@c false).
|
|---|
| 387 | * @param phVfsFile Where to return the VFS file handle.
|
|---|
| 388 | */
|
|---|
| 389 | RTDECL(int) RTVfsFileFromRTFile(RTFILE hFile, uint32_t fOpen, bool fLeaveOpen, PRTVFSFILE phVfsFile);
|
|---|
| 390 | RTDECL(RTHCUINTPTR) RTVfsFileToNative(RTFILE hVfsFile);
|
|---|
| 391 |
|
|---|
| 392 | /**
|
|---|
| 393 | * Convert the VFS file handle to a VFS I/O stream handle.
|
|---|
| 394 | *
|
|---|
| 395 | * @returns The VFS I/O stream handle on success, this must be released.
|
|---|
| 396 | * NIL_RTVFSIOSTREAM if the file handle is invalid.
|
|---|
| 397 | * @param hVfsFile The VFS file handle.
|
|---|
| 398 | * @sa RTVfsIoStrmToFile
|
|---|
| 399 | */
|
|---|
| 400 | RTDECL(RTVFSIOSTREAM) RTVfsFileToIoStream(RTVFSFILE hVfsFile);
|
|---|
| 401 |
|
|---|
| 402 | /**
|
|---|
| 403 | * Retains a reference to the VFS file handle.
|
|---|
| 404 | *
|
|---|
| 405 | * @returns New reference count on success, UINT32_MAX on failure.
|
|---|
| 406 | * @param hVfsFile The VFS file handle.
|
|---|
| 407 | */
|
|---|
| 408 | RTDECL(uint32_t) RTVfsFileRetain(RTVFSFILE hVfsFile);
|
|---|
| 409 |
|
|---|
| 410 | /**
|
|---|
| 411 | * Releases a reference to the VFS file handle.
|
|---|
| 412 | *
|
|---|
| 413 | * @returns New reference count on success (0 if closed), UINT32_MAX on failure.
|
|---|
| 414 | * @param hVfsFile The VFS file handle.
|
|---|
| 415 | */
|
|---|
| 416 | RTDECL(uint32_t) RTVfsFileRelease(RTVFSFILE hVfsFile);
|
|---|
| 417 |
|
|---|
| 418 | RTDECL(int) RTVfsFileQueryInfo(RTVFSFILE hVfsFile, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr);
|
|---|
| 419 | RTDECL(int) RTVfsFileRead(RTVFSFILE hVfsFile, void *pvBuf, size_t cbToRead, size_t *pcbRead);
|
|---|
| 420 | RTDECL(int) RTVfsFileReadAt(RTVFSFILE hVfsFile, RTFOFF off, void *pvBuf, size_t cbToRead, size_t *pcbRead);
|
|---|
| 421 | RTDECL(int) RTVfsFileWrite(RTVFSFILE hVfsFile, const void *pvBuf, size_t cbToWrite, size_t *pcbWritten);
|
|---|
| 422 | RTDECL(int) RTVfsFileWriteAt(RTVFSFILE hVfsFile, RTFOFF off, const void *pvBuf, size_t cbToWrite, size_t *pcbWritten);
|
|---|
| 423 | RTDECL(int) RTVfsFileFlush(RTVFSFILE hVfsFile);
|
|---|
| 424 | RTDECL(RTFOFF) RTVfsFilePoll(RTVFSFILE hVfsFile, uint32_t fEvents, RTMSINTERVAL cMillies, bool fIntr,
|
|---|
| 425 | uint32_t *pfRetEvents);
|
|---|
| 426 | RTDECL(RTFOFF) RTVfsFileTell(RTVFSFILE hVfsFile);
|
|---|
| 427 |
|
|---|
| 428 | RTDECL(int) RTVfsFileSeek(RTVFSFILE hVfsFile, RTFOFF offSeek, uint32_t uMethod, uint64_t *poffActual);
|
|---|
| 429 | RTDECL(int) RTVfsFileSetSize(RTVFSFILE hVfsFile, uint64_t cbSize);
|
|---|
| 430 | RTDECL(int) RTVfsFileGetSize(RTVFSFILE hVfsFile, uint64_t *pcbSize);
|
|---|
| 431 | RTDECL(RTFOFF) RTVfsFileGetMaxSize(RTVFSFILE hVfsFile);
|
|---|
| 432 | RTDECL(int) RTVfsFileGetMaxSizeEx(RTVFSFILE hVfsFile, PRTFOFF pcbMax);
|
|---|
| 433 |
|
|---|
| 434 | /** @} */
|
|---|
| 435 |
|
|---|
| 436 |
|
|---|
| 437 | /** @defgroup grp_rt_vfs_chain VFS Chains
|
|---|
| 438 | *
|
|---|
| 439 | * VFS chains is for doing pipe like things with VFS objects from the command
|
|---|
| 440 | * line. Imagine you want to cat the readme.gz of an ISO you could do
|
|---|
| 441 | * something like:
|
|---|
| 442 | * RTCat :iprtvfs:vfs(isofs,./mycd.iso)|ios(open,readme.gz)|ios(gunzip)
|
|---|
| 443 | * or
|
|---|
| 444 | * RTCat :iprtvfs:ios(isofs,./mycd.iso,/readme.gz)|ios(gunzip)
|
|---|
| 445 | *
|
|---|
| 446 | * The "isofs", "open" and "gunzip" bits in the above examples are chain
|
|---|
| 447 | * element providers registered with IPRT. See RTVFSCHAINELEMENTREG for how
|
|---|
| 448 | * these works.
|
|---|
| 449 | *
|
|---|
| 450 | * @{ */
|
|---|
| 451 |
|
|---|
| 452 | /** The path prefix used to identify an VFS chain specification. */
|
|---|
| 453 | #define RTVFSCHAIN_SPEC_PREFIX ":iprtvfs:"
|
|---|
| 454 |
|
|---|
| 455 | RTDECL(int) RTVfsChainOpenVfs( const char *pszSpec, PRTVFS phVfs, const char **ppszError);
|
|---|
| 456 | RTDECL(int) RTVfsChainOpenFsStream( const char *pszSpec, PRTVFSFSSTREAM phVfsFss, const char **ppszError);
|
|---|
| 457 | RTDECL(int) RTVfsChainOpenDir( const char *pszSpec, uint32_t fOpen, PRTVFSDIR phVfsDir, const char **ppszError);
|
|---|
| 458 | RTDECL(int) RTVfsChainOpenFile( const char *pszSpec, uint32_t fOpen, PRTVFSFILE phVfsFile, const char **ppszError);
|
|---|
| 459 | RTDECL(int) RTVfsChainOpenSymlink( const char *pszSpec, PRTVFSSYMLINK phVfsSym, const char **ppszError);
|
|---|
| 460 | RTDECL(int) RTVfsChainOpenIoStream( const char *pszSpec, uint32_t fOpen, PRTVFSIOSTREAM phVfsIos, const char **ppszError);
|
|---|
| 461 |
|
|---|
| 462 | /** @} */
|
|---|
| 463 |
|
|---|
| 464 |
|
|---|
| 465 | /** @} */
|
|---|
| 466 |
|
|---|
| 467 | RT_C_DECLS_END
|
|---|
| 468 |
|
|---|
| 469 | #endif /* !___iprt_vfs_h */
|
|---|
| 470 |
|
|---|
| 471 |
|
|---|
