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