1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
/* $Id: tarvfsreader.h $ */
/** @file
* IPRT - TAR Virtual Filesystem.
*/
/*
* Copyright (C) 2010-2023 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_tarvfsreader_h
#define IPRT_INCLUDED_SRC_common_zip_tarvfsreader_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include "tar.h"
/**
* TAR reader state machine states.
*/
typedef enum RTZIPTARREADERSTATE
{
/** Invalid state. */
RTZIPTARREADERSTATE_INVALID = 0,
/** Expecting the next file/dir/whatever entry. */
RTZIPTARREADERSTATE_FIRST,
/** Expecting more zero headers or the end of the stream. */
RTZIPTARREADERSTATE_ZERO,
/** Expecting a GNU long name. */
RTZIPTARREADERSTATE_GNU_LONGNAME,
/** Expecting a GNU long link. */
RTZIPTARREADERSTATE_GNU_LONGLINK,
/** Expecting a normal header or another GNU specific one. */
RTZIPTARREADERSTATE_GNU_NEXT,
/** End of valid states (not included). */
RTZIPTARREADERSTATE_END
} RTZIPTARREADERSTATE;
/**
* Tar reader instance data.
*/
typedef struct RTZIPTARREADER
{
/** Zero header counter. */
uint32_t cZeroHdrs;
/** The state machine state. */
RTZIPTARREADERSTATE enmState;
/** The type of the previous TAR header.
* @remarks Same a enmType for the first header in the TAR stream. */
RTZIPTARTYPE enmPrevType;
/** The type of the current TAR header. */
RTZIPTARTYPE enmType;
/** The current header. */
RTZIPTARHDR Hdr;
/** The expected long name/link length (GNU). */
uint32_t cbGnuLongExpect;
/** The current long name/link length (GNU). */
uint32_t offGnuLongCur;
/** The name of the current object.
* This is for handling GNU and PAX long names. */
char szName[RTPATH_MAX];
/** The current link target if symlink or hardlink. */
char szTarget[RTPATH_MAX];
} RTZIPTARREADER;
/** Pointer to the TAR reader instance data. */
typedef RTZIPTARREADER *PRTZIPTARREADER;
/**
* Tar directory, character device, block device, fifo socket or symbolic link.
*/
typedef struct RTZIPTARBASEOBJ
{
/** 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? */
PRTZIPTARREADER pTarReader;
/** The object info with unix attributes. */
RTFSOBJINFO ObjInfo;
} RTZIPTARBASEOBJ;
/** Pointer to a TAR filesystem stream base object. */
typedef RTZIPTARBASEOBJ *PRTZIPTARBASEOBJ;
/**
* Tar file represented as a VFS I/O stream.
*/
typedef struct RTZIPTARIOSTREAM
{
/** The basic TAR object data. */
RTZIPTARBASEOBJ 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;
} RTZIPTARIOSTREAM;
/** Pointer to a the private data of a TAR file I/O stream. */
typedef RTZIPTARIOSTREAM *PRTZIPTARIOSTREAM;
/**
* Tar filesystem stream private data.
*/
typedef struct RTZIPTARFSSTREAM
{
/** The input I/O stream. */
RTVFSIOSTREAM hVfsIos;
/** The current object (referenced). */
RTVFSOBJ hVfsCurObj;
/** Pointer to the private data if hVfsCurObj is representing a file. */
PRTZIPTARIOSTREAM 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 TAR reader instance data. */
RTZIPTARREADER TarReader;
} RTZIPTARFSSTREAM;
/** Pointer to a the private data of a TAR filesystem stream. */
typedef RTZIPTARFSSTREAM *PRTZIPTARFSSTREAM;
DECLHIDDEN(void) rtZipTarReaderInit(PRTZIPTARFSSTREAM pThis, RTVFSIOSTREAM hVfsIos, uint64_t offStart);
DECL_HIDDEN_CALLBACK(int) rtZipTarFss_Next(void *pvThis, char **ppszName, RTVFSOBJTYPE *penmType, PRTVFSOBJ phVfsObj);
DECLHIDDEN(PRTZIPTARBASEOBJ) rtZipTarFsStreamBaseObjToPrivate(PRTZIPTARFSSTREAM pThis, RTVFSOBJ hVfsObj);
#endif /* !IPRT_INCLUDED_SRC_common_zip_tarvfsreader_h */
|
