| 1 | /** @file
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| 2 | * IPRT - Tar archive I/O.
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| 3 | */
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| 4 |
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| 5 | /*
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| 6 | * Copyright (C) 2009-2010 Oracle Corporation
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| 7 | *
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| 8 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 9 | * available from http://www.virtualbox.org. This file is free software;
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| 10 | * you can redistribute it and/or modify it under the terms of the GNU
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| 11 | * General Public License (GPL) as published by the Free Software
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| 12 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 13 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 14 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 15 | *
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| 16 | * The contents of this file may alternatively be used under the terms
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| 17 | * of the Common Development and Distribution License Version 1.0
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| 18 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 19 | * VirtualBox OSE distribution, in which case the provisions of the
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| 20 | * CDDL are applicable instead of those of the GPL.
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| 21 | *
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| 22 | * You may elect to license modified versions of this file under the
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| 23 | * terms and conditions of either the GPL or the CDDL or both.
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| 24 | */
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| 25 |
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| 26 | #ifndef ___iprt_tar_h
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| 27 | #define ___iprt_tar_h
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| 28 |
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| 29 | #include <iprt/cdefs.h>
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| 30 | #include <iprt/types.h>
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| 31 | #include <iprt/time.h>
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| 32 |
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| 33 | RT_C_DECLS_BEGIN
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| 34 |
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| 35 | /** @defgroup grp_rt_tar RTTar - Tar archive I/O
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| 36 | * @ingroup grp_rt
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| 37 | * @{
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| 38 | */
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| 39 |
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| 40 | /** A tar handle */
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| 41 | typedef R3PTRTYPE(struct RTTARINTERNAL *) RTTAR;
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| 42 | /** Pointer to a RTTAR interface handle. */
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| 43 | typedef RTTAR *PRTTAR;
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| 44 | /** Nil RTTAR interface handle. */
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| 45 | #define NIL_RTTAR ((RTTAR)0)
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| 46 |
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| 47 | /** A tar file handle */
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| 48 | typedef R3PTRTYPE(struct RTTARFILEINTERNAL *) RTTARFILE;
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| 49 | /** Pointer to a RTTARFILE interface handle. */
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| 50 | typedef RTTARFILE *PRTTARFILE;
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| 51 | /** Nil RTTARFILE interface handle. */
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| 52 | #define NIL_RTTARFILE ((RTTARFILE)0)
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| 53 |
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| 54 | /** Maximum length of a tar filename, excluding the terminating '\0'. More
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| 55 | * does not fit into a tar record. */
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| 56 | #define RTTAR_NAME_MAX 99
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| 57 |
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| 58 | /**
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| 59 | * Opens a Tar archive.
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| 60 | *
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| 61 | * Use the mask to specify the access type. In create mode the target file
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| 62 | * have not to exists.
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| 63 | *
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| 64 | * @returns IPRT status code.
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| 65 | *
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| 66 | * @param phTar Where to store the RTTAR handle.
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| 67 | * @param pszTarname The file name of the tar archive to open.
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| 68 | * @param fMode Open flags, i.e a combination of the RTFILE_O_* defines.
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| 69 | * The ACCESS, ACTION and DENY flags are mandatory!
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| 70 | * @param fStream Open the file in stream mode. Within this mode no
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| 71 | * seeking is allowed. Use this together with
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| 72 | * RTTarFileCurrent, RTTarFileOpenCurrent,
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| 73 | * RTTarFileSeekNextFile and the read method to
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| 74 | * sequential read a tar file. Currently ignored with
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| 75 | * RTFILE_O_WRITE.
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| 76 | */
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| 77 | RTR3DECL(int) RTTarOpen(PRTTAR phTar, const char *pszTarname, uint32_t fMode, bool fStream);
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| 78 |
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| 79 | #if 0
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| 80 | /**
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| 81 | * Opens a Tar archive by handle.
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| 82 | *
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| 83 | * Use the mask to specify the access type. In create mode the target file
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| 84 | * have not to exists.
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| 85 | *
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| 86 | * @returns IPRT status code.
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| 87 | *
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| 88 | * @param phTar Where to store the RTTAR handle.
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| 89 | * @param hFile The file handle of the tar file. This is expected
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| 90 | * to be a regular file at the moment.
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| 91 | * @param fStream Open the file in stream mode. Within this mode no
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| 92 | * seeking is allowed. Use this together with
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| 93 | * RTTarFileCurrent, RTTarFileOpenCurrent,
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| 94 | * RTTarFileSeekNextFile and the read method to
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| 95 | * sequential read a tar file. Currently ignored with
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| 96 | * RTFILE_O_WRITE.
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| 97 | */
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| 98 | RTR3DECL(int) RTTarOpenByHandle(PRTTAR phTar, RTFILE hFile, uint32_t fMode, bool fStream);
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| 99 | #endif
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| 100 |
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| 101 | /**
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| 102 | * Close the Tar archive.
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| 103 | *
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| 104 | * @returns IPRT status code.
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| 105 | *
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| 106 | * @param hTar Handle to the RTTAR interface.
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| 107 | */
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| 108 | RTR3DECL(int) RTTarClose(RTTAR hTar);
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| 109 |
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| 110 | /**
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| 111 | * Open a file in the Tar archive.
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| 112 | *
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| 113 | * @returns IPRT status code.
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| 114 | *
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| 115 | * @param hTar The handle of the tar archive.
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| 116 | * @param phFile Where to store the handle to the opened file.
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| 117 | * @param pszFilename Path to the file which is to be opened. (UTF-8)
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| 118 | * @param fOpen Open flags, i.e a combination of the RTFILE_O_* defines.
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| 119 | * The ACCESS, ACTION flags are mandatory! DENY flags
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| 120 | * are currently not supported.
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| 121 | *
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| 122 | * @remarks Write mode means append mode only. It is not possible to make
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| 123 | * changes to existing files.
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| 124 | *
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| 125 | * @remarks Currently it is not possible to open more than one file in write
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| 126 | * mode. Although open more than one file in read only mode (even when
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| 127 | * one file is opened in write mode) is always possible.
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| 128 | */
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| 129 | RTR3DECL(int) RTTarFileOpen(RTTAR hTar, PRTTARFILE phFile, const char *pszFilename, uint32_t fOpen);
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| 130 |
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| 131 | /**
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| 132 | * Close the file opened by RTTarFileOpen.
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| 133 | *
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| 134 | * @returns IPRT status code.
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| 135 | *
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| 136 | * @param hFile The file handle to close.
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| 137 | */
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| 138 | RTR3DECL(int) RTTarFileClose(RTTARFILE hFile);
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| 139 |
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| 140 | /**
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| 141 | * Changes the read & write position in a file.
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| 142 | *
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| 143 | * @returns IPRT status code.
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| 144 | *
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| 145 | * @param hFile Handle to the file.
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| 146 | * @param offSeek Offset to seek.
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| 147 | * @param uMethod Seek method, i.e. one of the RTFILE_SEEK_* defines.
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| 148 | * @param poffActual Where to store the new file position.
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| 149 | * NULL is allowed.
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| 150 | */
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| 151 | RTR3DECL(int) RTTarFileSeek(RTTARFILE hFile, uint64_t offSeek, unsigned uMethod, uint64_t *poffActual);
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| 152 |
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| 153 | /**
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| 154 | * Gets the current file position.
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| 155 | *
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| 156 | * @returns File offset.
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| 157 | * @returns UINT64_MAX on failure.
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| 158 | *
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| 159 | * @param hFile Handle to the file.
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| 160 | */
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| 161 | RTR3DECL(uint64_t) RTTarFileTell(RTTARFILE hFile);
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| 162 |
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| 163 | /**
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| 164 | * Read bytes from a file.
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| 165 | *
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| 166 | * @returns IPRT status code.
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| 167 | *
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| 168 | * @param hFile Handle to the file.
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| 169 | * @param pvBuf Where to put the bytes we read.
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| 170 | * @param cbToRead How much to read.
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| 171 | * @param *pcbRead How much we actually read .
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| 172 | * If NULL an error will be returned for a partial read.
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| 173 | */
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| 174 | RTR3DECL(int) RTTarFileRead(RTTARFILE hFile, void *pvBuf, size_t cbToRead, size_t *pcbRead);
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| 175 |
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| 176 | /**
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| 177 | * Read bytes from a file at a given offset.
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| 178 | * This function may modify the file position.
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| 179 | *
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| 180 | * @returns IPRT status code.
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| 181 | *
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| 182 | * @param hFile Handle to the file.
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| 183 | * @param off Where to read.
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| 184 | * @param pvBuf Where to put the bytes we read.
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| 185 | * @param cbToRead How much to read.
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| 186 | * @param *pcbRead How much we actually read .
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| 187 | * If NULL an error will be returned for a partial read.
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| 188 | */
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| 189 | RTR3DECL(int) RTTarFileReadAt(RTTARFILE hFile, uint64_t off, void *pvBuf, size_t cbToRead, size_t *pcbRead);
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| 190 |
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| 191 | /**
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| 192 | * Write bytes to a file.
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| 193 | *
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| 194 | * @returns IPRT status code.
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| 195 | *
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| 196 | * @param hFile Handle to the file.
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| 197 | * @param pvBuf What to write.
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| 198 | * @param cbToWrite How much to write.
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| 199 | * @param *pcbWritten How much we actually wrote.
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| 200 | * If NULL an error will be returned for a partial write.
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| 201 | */
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| 202 | RTR3DECL(int) RTTarFileWrite(RTTARFILE hFile, const void *pvBuf, size_t cbToWrite, size_t *pcbWritten);
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| 203 |
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| 204 | /**
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| 205 | * Write bytes to a file at a given offset.
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| 206 | * This function may modify the file position.
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| 207 | *
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| 208 | * @returns IPRT status code.
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| 209 | *
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| 210 | * @param hFile Handle to the file.
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| 211 | * @param off Where to write.
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| 212 | * @param pvBuf What to write.
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| 213 | * @param cbToWrite How much to write.
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| 214 | * @param *pcbWritten How much we actually wrote.
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| 215 | * If NULL an error will be returned for a partial write.
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| 216 | */
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| 217 | RTR3DECL(int) RTTarFileWriteAt(RTTARFILE hFile, uint64_t off, const void *pvBuf, size_t cbToWrite, size_t *pcbWritten);
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| 218 |
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| 219 | /**
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| 220 | * Query the size of the file.
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| 221 | *
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| 222 | * @returns IPRT status code.
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| 223 | *
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| 224 | * @param hFile Handle to the file.
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| 225 | * @param pcbSize Where to store the filesize.
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| 226 | */
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| 227 | RTR3DECL(int) RTTarFileGetSize(RTTARFILE hFile, uint64_t *pcbSize);
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| 228 |
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| 229 | /**
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| 230 | * Set the size of the file.
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| 231 | *
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| 232 | * @returns IPRT status code.
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| 233 | *
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| 234 | * @param hFile Handle to the file.
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| 235 | * @param cbSize The new file size.
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| 236 | */
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| 237 | RTR3DECL(int) RTTarFileSetSize(RTTARFILE hFile, uint64_t cbSize);
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| 238 |
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| 239 | /**
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| 240 | * Gets the mode flags of an open file.
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| 241 | *
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| 242 | * @returns IPRT status code.
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| 243 | *
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| 244 | * @param hFile Handle to the file.
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| 245 | * @param pfMode Where to store the file mode, see @ref grp_rt_fs for details.
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| 246 | */
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| 247 | RTR3DECL(int) RTTarFileGetMode(RTTARFILE hFile, uint32_t *pfMode);
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| 248 |
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| 249 | /**
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| 250 | * Changes the mode flags of an open file.
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| 251 | *
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| 252 | * @returns IPRT status code.
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| 253 | *
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| 254 | * @param hFile Handle to the file.
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| 255 | * @param fMode The new file mode, see @ref grp_rt_fs for details.
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| 256 | */
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| 257 | RTR3DECL(int) RTTarFileSetMode(RTTARFILE hFile, uint32_t fMode);
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| 258 |
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| 259 | /**
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| 260 | * Gets the modification timestamp of the file.
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| 261 | *
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| 262 | * @returns IPRT status code.
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| 263 | *
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| 264 | * @param pFile Handle to the file.
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| 265 | * @param pTime Where to store the time.
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| 266 | */
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| 267 | RTR3DECL(int) RTTarFileGetTime(RTTARFILE hFile, PRTTIMESPEC pTime);
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| 268 |
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| 269 | /**
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| 270 | * Sets the modification timestamp of the file.
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| 271 | *
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| 272 | * @returns IPRT status code.
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| 273 | *
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| 274 | * @param pFile Handle to the file.
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| 275 | * @param pTime The time to store.
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| 276 | */
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| 277 | RTR3DECL(int) RTTarFileSetTime(RTTARFILE hFile, PRTTIMESPEC pTime);
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| 278 |
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| 279 | /**
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| 280 | * Gets the owner and/or group of an open file.
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| 281 | *
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| 282 | * @returns IPRT status code.
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| 283 | *
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| 284 | * @param hFile Handle to the file.
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| 285 | * @param pUid Where to store the owner user id. NULL is ok.
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| 286 | * @param pGid Where to store the group id. NULL is ok.
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| 287 | */
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| 288 | RTR3DECL(int) RTTarFileGetOwner(RTTARFILE hFile, uint32_t *pUid, uint32_t *pGid);
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| 289 |
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| 290 | /**
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| 291 | * Changes the owner and/or group of an open file.
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| 292 | *
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| 293 | * @returns IPRT status code.
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| 294 | *
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| 295 | * @param hFile Handle to the file.
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| 296 | * @param uid The new file owner user id. Use -1 (or ~0) to leave this unchanged.
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| 297 | * @param gid The new group id. Use -1 (or ~0) to leave this unchanged.
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| 298 | */
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| 299 | RTR3DECL(int) RTTarFileSetOwner(RTTARFILE hFile, uint32_t uid, uint32_t gid);
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| 300 |
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| 301 | /******************************************************************************
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| 302 | * Convenience Functions *
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| 303 | ******************************************************************************/
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| 304 |
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| 305 | /**
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| 306 | * Check if the specified file exists in the Tar archive.
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| 307 | *
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| 308 | * (The matching is case sensitive.)
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| 309 | *
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| 310 | * @note Currently only regular files are supported.
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| 311 | *
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| 312 | * @returns IPRT status code.
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| 313 | * @retval VINF_SUCCESS when the file exists in the Tar archive.
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| 314 | * @retval VERR_FILE_NOT_FOUND when the file not exists in the Tar archive.
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| 315 | *
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| 316 | * @param pszTarFile Tar file to check.
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| 317 | * @param pszFile Filename to check for.
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| 318 | *
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| 319 | * @todo This is predicate function which SHALL return bool!
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| 320 | */
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| 321 | RTR3DECL(int) RTTarFileExists(const char *pszTarFile, const char *pszFile);
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| 322 |
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| 323 | /**
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| 324 | * Create a file list from a Tar archive.
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| 325 | *
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| 326 | * @note Currently only regular files are supported.
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| 327 | *
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| 328 | * @returns IPRT status code.
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| 329 | *
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| 330 | * @param pszTarFile Tar file to list files from.
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| 331 | * @param ppapszFiles On success an array with array with the filenames is
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| 332 | * returned. The names must be freed with RTStrFree and
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| 333 | * the array with RTMemFree.
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| 334 | * @param pcFiles On success the number of entries in ppapszFiles.
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| 335 | */
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| 336 | RTR3DECL(int) RTTarList(const char *pszTarFile, char ***ppapszFiles, size_t *pcFiles);
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| 337 |
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| 338 | /**
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| 339 | * Extract a file from a Tar archive into a memory buffer.
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| 340 | *
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| 341 | * The caller is responsible for the deletion of the returned memory buffer.
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| 342 | *
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| 343 | * (The matching is case sensitive.)
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| 344 | *
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| 345 | * @note Currently only regular files are supported. Also some of the header
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| 346 | * fields are not used (uid, gid, uname, gname, mtime).
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| 347 | *
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| 348 | * @returns IPRT status code.
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| 349 | *
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| 350 | * @param pszTarFile Tar file to extract files from.
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| 351 | * @param ppBuf The buffer which will held the extracted data.
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| 352 | * @param pcbSize The size (in bytes) of ppBuf after successful
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| 353 | * extraction.
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| 354 | * @param pszFile The file to extract.
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| 355 | * @param pfnProgressCallback Progress callback function. Optional.
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| 356 | * @param pvUser User defined data for the progress
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| 357 | * callback. Optional.
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| 358 | */
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| 359 | RTR3DECL(int) RTTarExtractFileToBuf(const char *pszTarFile, void **ppvBuf, size_t *pcbSize, const char *pszFile,
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| 360 | PFNRTPROGRESS pfnProgressCallback, void *pvUser);
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| 361 |
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| 362 | /**
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| 363 | * Extract a set of files from a Tar archive.
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| 364 | *
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| 365 | * Also note that this function is atomic. If an error occurs all previously
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| 366 | * extracted files will be deleted.
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| 367 | *
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| 368 | * (The matching is case sensitive.)
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| 369 | *
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| 370 | * @note Currently only regular files are supported. Also some of the header
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| 371 | * fields are not used (uid, gid, uname, gname, mtime).
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| 372 | *
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| 373 | * @returns IPRT status code.
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| 374 | *
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| 375 | * @param pszTarFile Tar file to extract files from.
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| 376 | * @param pszOutputDir Where to store the extracted files. Must exist.
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| 377 | * @param papszFiles Which files should be extracted.
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| 378 | * @param cFiles The number of files in papszFiles.
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| 379 | * @param pfnProgressCallback Progress callback function. Optional.
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| 380 | * @param pvUser User defined data for the progress
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| 381 | * callback. Optional.
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| 382 | */
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| 383 | RTR3DECL(int) RTTarExtractFiles(const char *pszTarFile, const char *pszOutputDir, const char * const *papszFiles, size_t cFiles, PFNRTPROGRESS pfnProgressCallback, void *pvUser);
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| 384 |
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| 385 | /**
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| 386 | * Extract all files of the archive.
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| 387 | *
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| 388 | * @note Currently only regular files are supported. Also some of the header
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| 389 | * fields are not used (uid, gid, uname, gname, mtime).
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| 390 | *
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| 391 | * @returns IPRT status code.
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| 392 | *
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| 393 | * @param pszTarFile Tar file to extract the files from.
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| 394 | * @param pszOutputDir Where to store the extracted files. Must exist.
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| 395 | * @param pfnProgressCallback Progress callback function. Optional.
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| 396 | * @param pvUser User defined data for the progress
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| 397 | * callback. Optional.
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| 398 | */
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| 399 | RTR3DECL(int) RTTarExtractAll(const char *pszTarFile, const char *pszOutputDir, PFNRTPROGRESS pfnProgressCallback, void *pvUser);
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| 400 |
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| 401 | /**
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| 402 | * Create a Tar archive out of the given files.
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| 403 | *
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| 404 | * @note Currently only regular files are supported.
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| 405 | *
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| 406 | * @returns IPRT status code.
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| 407 | *
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| 408 | * @param pszTarFile Where to create the Tar archive.
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| 409 | * @param papszFiles Which files should be included.
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| 410 | * @param cFiles The number of files in papszFiles.
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| 411 | * @param pfnProgressCallback Progress callback function. Optional.
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| 412 | * @param pvUser User defined data for the progress
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| 413 | * callback. Optional.
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| 414 | */
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| 415 | RTR3DECL(int) RTTarCreate(const char *pszTarFile, const char * const *papszFiles, size_t cFiles, PFNRTPROGRESS pfnProgressCallback, void *pvUser);
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| 416 |
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| 417 | /******************************************************************************
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| 418 | * Streaming Functions *
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| 419 | ******************************************************************************/
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| 420 |
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| 421 | /**
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| 422 | * Return the filename where RTTar currently stays at.
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| 423 | *
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| 424 | * @returns IPRT status code.
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|---|
| 425 | *
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| 426 | * @param hTar Handle to the RTTAR interface.
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| 427 | * @param ppszFilename On success the filename.
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|---|
| 428 | */
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| 429 | RTR3DECL(int) RTTarCurrentFile(RTTAR hTar, char **ppszFilename);
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| 430 |
|
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| 431 | /**
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|---|
| 432 | * Jumps to the next file from the current RTTar position.
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|---|
| 433 | *
|
|---|
| 434 | * @returns IPRT status code.
|
|---|
| 435 | *
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| 436 | * @param hTar Handle to the RTTAR interface.
|
|---|
| 437 | */
|
|---|
| 438 | RTR3DECL(int) RTTarSeekNextFile(RTTAR hTar);
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| 439 |
|
|---|
| 440 | /**
|
|---|
| 441 | * Opens the file where RTTar currently stays at.
|
|---|
| 442 | *
|
|---|
| 443 | * @returns IPRT status code.
|
|---|
| 444 | *
|
|---|
| 445 | * @param hTar Handle to the RTTAR interface.
|
|---|
| 446 | * @param phFile Where to store the handle to the opened file.
|
|---|
| 447 | * @param ppszFilename On success the filename.
|
|---|
| 448 | * @param fOpen Open flags, i.e a combination of the RTFILE_O_* defines.
|
|---|
| 449 | * The ACCESS, ACTION flags are mandatory! Currently
|
|---|
| 450 | * only RTFILE_O_OPEN | RTFILE_O_READ is supported.
|
|---|
| 451 | */
|
|---|
| 452 | RTR3DECL(int) RTTarFileOpenCurrentFile(RTTAR hTar, PRTTARFILE phFile, char **ppszFilename, uint32_t fOpen);
|
|---|
| 453 |
|
|---|
| 454 |
|
|---|
| 455 | /** @} */
|
|---|
| 456 |
|
|---|
| 457 | RT_C_DECLS_END
|
|---|
| 458 |
|
|---|
| 459 | #endif /* ___iprt_tar_h */
|
|---|
| 460 |
|
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