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/* $Id: cpiovfsreader.h $ */
/** @file
* IPRT - CPIO Virtual Filesystem.
*/
/*
* Copyright (C) 2020-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
#ifndef IPRT_INCLUDED_SRC_common_zip_cpiovfsreader_h
#define IPRT_INCLUDED_SRC_common_zip_cpiovfsreader_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <iprt/formats/cpio.h>
/**
* CPIO archive type.
*/
typedef enum RTZIPCPIOTYPE
{
/** Invalid type value. */
RTZIPCPIOTYPE_INVALID = 0,
/** Ancient binary archive. */
RTZIPCPIOTYPE_ANCIENT_BIN,
/** Portable ASCII format as defined by SuSV2. */
RTZIPCPIOTYPE_ASCII_SUSV2,
/** "New" ASCII format. */
RTZIPCPIOTYPE_ASCII_NEW,
/** "New" ASCII format with checksumming. */
RTZIPCPIOTYPE_ASCII_NEW_CHKSUM,
/** End of the valid type values (this is not valid). */
RTZIPCPIOTYPE_END,
/** The usual type blow up. */
RTZIPCPIOTYPE_32BIT_HACK = 0x7fffffff
} RTZIPCPIOTYPE;
typedef RTZIPCPIOTYPE *PRTZIPCPIOTYPE;
/**
* CPIO reader instance data.
*/
typedef struct RTZIPCPIOREADER
{
/** The object info with unix attributes. */
RTFSOBJINFO ObjInfo;
/** The path length. */
uint32_t cbPath;
/** The name of the current object. */
char szName[RTPATH_MAX];
/** The current link target if symlink. */
char szTarget[RTPATH_MAX];
} RTZIPCPIOREADER;
/** Pointer to the CPIO reader instance data. */
typedef RTZIPCPIOREADER *PRTZIPCPIOREADER;
/**
* CPIO directory, character device, block device, fifo socket or symbolic link.
*/
typedef struct RTZIPCPIOBASEOBJ
{
/** The stream offset of the (first) header in the input stream/file. */
RTFOFF offHdr;
/** The stream offset of the first header of the next object (for truncating the
* tar file after this object (updating)). */
RTFOFF offNextHdr;
/** Pointer to the reader instance data (resides in the filesystem
* stream).
* @todo Fix this so it won't go stale... Back ref from this obj to fss? */
PRTZIPCPIOREADER pCpioReader;
/** The object info with unix attributes. */
RTFSOBJINFO ObjInfo;
} RTZIPCPIOBASEOBJ;
/** Pointer to a CPIO filesystem stream base object. */
typedef RTZIPCPIOBASEOBJ *PRTZIPCPIOBASEOBJ;
/**
* CPIO file represented as a VFS I/O stream.
*/
typedef struct RTZIPCPIOIOSTREAM
{
/** The basic TAR object data. */
RTZIPCPIOBASEOBJ BaseObj;
/** The number of bytes in the file. */
RTFOFF cbFile;
/** The current file position. */
RTFOFF offFile;
/** The start position in the hVfsIos (for seekable hVfsIos). */
RTFOFF offStart;
/** The number of padding bytes following the file. */
uint32_t cbPadding;
/** Set if we've reached the end of this file. */
bool fEndOfStream;
/** The input I/O stream. */
RTVFSIOSTREAM hVfsIos;
} RTZIPCPIOIOSTREAM;
/** Pointer to a the private data of a CPIO file I/O stream. */
typedef RTZIPCPIOIOSTREAM *PRTZIPCPIOIOSTREAM;
/**
* CPIO filesystem stream private data.
*/
typedef struct RTZIPCPIOFSSTREAM
{
/** The input I/O stream. */
RTVFSIOSTREAM hVfsIos;
/** The current object (referenced). */
RTVFSOBJ hVfsCurObj;
/** Pointer to the private data if hVfsCurObj is representing a file. */
PRTZIPCPIOIOSTREAM pCurIosData;
/** The start offset. */
RTFOFF offStart;
/** The offset of the next header. */
RTFOFF offNextHdr;
/** The offset of the first header for the current object.
* When reaching the end, this will be the same as offNextHdr which will be
* pointing to the first zero header */
RTFOFF offCurHdr;
/** Set if we've reached the end of the stream. */
bool fEndOfStream;
/** Set if we've encountered a fatal error. */
int rcFatal;
/** The CPIO reader instance data. */
RTZIPCPIOREADER CpioReader;
} RTZIPCPIOFSSTREAM;
/** Pointer to a the private data of a CPIO filesystem stream. */
typedef RTZIPCPIOFSSTREAM *PRTZIPCPIOFSSTREAM;
DECLHIDDEN(void) rtZipCpioReaderInit(PRTZIPCPIOFSSTREAM pThis, RTVFSIOSTREAM hVfsIos, uint64_t offStart);
DECL_HIDDEN_CALLBACK(int) rtZipCpioFss_Next(void *pvThis, char **ppszName, RTVFSOBJTYPE *penmType, PRTVFSOBJ phVfsObj);
DECLHIDDEN(PRTZIPCPIOBASEOBJ) rtZipCpioFsStreamBaseObjToPrivate(PRTZIPCPIOFSSTREAM pThis, RTVFSOBJ hVfsObj);
#endif /* !IPRT_INCLUDED_SRC_common_zip_cpiovfsreader_h */
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