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1 ------------------------------------------------------------------
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2 This file is part of bzip2/libbzip2, a program and library for
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3 lossless, block-sorting data compression.
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4
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5 bzip2/libbzip2 version 1.0.6 of 6 September 2010
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6 Copyright (C) 1996-2010 Julian Seward <jseward@bzip.org>
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7
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8 Please read the WARNING, DISCLAIMER and PATENTS sections in the
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9 README file.
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10
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11 This program is released under the terms of the license contained
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12 in the file LICENSE.
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13 ------------------------------------------------------------------
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14
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15
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16 0.9.0
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17 ~~~~~
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18 First version.
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19
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20
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21 0.9.0a
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22 ~~~~~~
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23 Removed 'ranlib' from Makefile, since most modern Unix-es
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24 don't need it, or even know about it.
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25
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26
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27 0.9.0b
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28 ~~~~~~
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29 Fixed a problem with error reporting in bzip2.c. This does not effect
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30 the library in any way. Problem is: versions 0.9.0 and 0.9.0a (of the
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31 program proper) compress and decompress correctly, but give misleading
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32 error messages (internal panics) when an I/O error occurs, instead of
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33 reporting the problem correctly. This shouldn't give any data loss
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34 (as far as I can see), but is confusing.
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35
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36 Made the inline declarations disappear for non-GCC compilers.
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37
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38
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39 0.9.0c
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40 ~~~~~~
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41 Fixed some problems in the library pertaining to some boundary cases.
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42 This makes the library behave more correctly in those situations. The
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43 fixes apply only to features (calls and parameters) not used by
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44 bzip2.c, so the non-fixedness of them in previous versions has no
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45 effect on reliability of bzip2.c.
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46
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47 In bzlib.c:
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48 * made zero-length BZ_FLUSH work correctly in bzCompress().
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49 * fixed bzWrite/bzRead to ignore zero-length requests.
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50 * fixed bzread to correctly handle read requests after EOF.
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51 * wrong parameter order in call to bzDecompressInit in
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52 bzBuffToBuffDecompress. Fixed.
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53
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54 In compress.c:
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55 * changed setting of nGroups in sendMTFValues() so as to
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56 do a bit better on small files. This _does_ effect
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57 bzip2.c.
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58
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59
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60 0.9.5a
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61 ~~~~~~
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62 Major change: add a fallback sorting algorithm (blocksort.c)
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63 to give reasonable behaviour even for very repetitive inputs.
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64 Nuked --repetitive-best and --repetitive-fast since they are
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65 no longer useful.
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66
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67 Minor changes: mostly a whole bunch of small changes/
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68 bugfixes in the driver (bzip2.c). Changes pertaining to the
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69 user interface are:
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70
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71 allow decompression of symlink'd files to stdout
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72 decompress/test files even without .bz2 extension
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73 give more accurate error messages for I/O errors
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74 when compressing/decompressing to stdout, don't catch control-C
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75 read flags from BZIP2 and BZIP environment variables
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76 decline to break hard links to a file unless forced with -f
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77 allow -c flag even with no filenames
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78 preserve file ownerships as far as possible
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79 make -s -1 give the expected block size (100k)
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80 add a flag -q --quiet to suppress nonessential warnings
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81 stop decoding flags after --, so files beginning in - can be handled
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82 resolved inconsistent naming: bzcat or bz2cat ?
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83 bzip2 --help now returns 0
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84
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85 Programming-level changes are:
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86
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87 fixed syntax error in GET_LL4 for Borland C++ 5.02
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88 let bzBuffToBuffDecompress return BZ_DATA_ERROR{_MAGIC}
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89 fix overshoot of mode-string end in bzopen_or_bzdopen
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90 wrapped bzlib.h in #ifdef __cplusplus ... extern "C" { ... }
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91 close file handles under all error conditions
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92 added minor mods so it compiles with DJGPP out of the box
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93 fixed Makefile so it doesn't give problems with BSD make
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94 fix uninitialised memory reads in dlltest.c
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95
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96 0.9.5b
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97 ~~~~~~
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98 Open stdin/stdout in binary mode for DJGPP.
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99
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100 0.9.5c
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101 ~~~~~~
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102 Changed BZ_N_OVERSHOOT to be ... + 2 instead of ... + 1. The + 1
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103 version could cause the sorted order to be wrong in some extremely
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104 obscure cases. Also changed setting of quadrant in blocksort.c.
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105
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106 0.9.5d
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107 ~~~~~~
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108 The only functional change is to make bzlibVersion() in the library
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109 return the correct string. This has no effect whatsoever on the
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110 functioning of the bzip2 program or library. Added a couple of casts
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111 so the library compiles without warnings at level 3 in MS Visual
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112 Studio 6.0. Included a Y2K statement in the file Y2K_INFO. All other
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113 changes are minor documentation changes.
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114
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115 1.0
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116 ~~~
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117 Several minor bugfixes and enhancements:
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118
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119 * Large file support. The library uses 64-bit counters to
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120 count the volume of data passing through it. bzip2.c
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121 is now compiled with -D_FILE_OFFSET_BITS=64 to get large
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122 file support from the C library. -v correctly prints out
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123 file sizes greater than 4 gigabytes. All these changes have
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124 been made without assuming a 64-bit platform or a C compiler
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125 which supports 64-bit ints, so, except for the C library
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126 aspect, they are fully portable.
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127
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128 * Decompression robustness. The library/program should be
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129 robust to any corruption of compressed data, detecting and
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130 handling _all_ corruption, instead of merely relying on
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131 the CRCs. What this means is that the program should
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132 never crash, given corrupted data, and the library should
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133 always return BZ_DATA_ERROR.
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134
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135 * Fixed an obscure race-condition bug only ever observed on
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136 Solaris, in which, if you were very unlucky and issued
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137 control-C at exactly the wrong time, both input and output
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138 files would be deleted.
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139
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140 * Don't run out of file handles on test/decompression when
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141 large numbers of files have invalid magic numbers.
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142
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143 * Avoid library namespace pollution. Prefix all exported
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144 symbols with BZ2_.
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145
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146 * Minor sorting enhancements from my DCC2000 paper.
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147
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148 * Advance the version number to 1.0, so as to counteract the
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149 (false-in-this-case) impression some people have that programs
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150 with version numbers less than 1.0 are in some way, experimental,
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151 pre-release versions.
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152
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153 * Create an initial Makefile-libbz2_so to build a shared library.
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154 Yes, I know I should really use libtool et al ...
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155
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156 * Make the program exit with 2 instead of 0 when decompression
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157 fails due to a bad magic number (ie, an invalid bzip2 header).
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158 Also exit with 1 (as the manual claims :-) whenever a diagnostic
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159 message would have been printed AND the corresponding operation
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160 is aborted, for example
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161 bzip2: Output file xx already exists.
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162 When a diagnostic message is printed but the operation is not
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163 aborted, for example
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164 bzip2: Can't guess original name for wurble -- using wurble.out
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165 then the exit value 0 is returned, unless some other problem is
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166 also detected.
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167
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168 I think it corresponds more closely to what the manual claims now.
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169
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170
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171 1.0.1
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172 ~~~~~
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173 * Modified dlltest.c so it uses the new BZ2_ naming scheme.
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174 * Modified makefile-msc to fix minor build probs on Win2k.
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175 * Updated README.COMPILATION.PROBLEMS.
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176
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177 There are no functionality changes or bug fixes relative to version
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178 1.0.0. This is just a documentation update + a fix for minor Win32
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179 build problems. For almost everyone, upgrading from 1.0.0 to 1.0.1 is
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180 utterly pointless. Don't bother.
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181
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182
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183 1.0.2
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184 ~~~~~
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185 A bug fix release, addressing various minor issues which have appeared
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186 in the 18 or so months since 1.0.1 was released. Most of the fixes
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187 are to do with file-handling or documentation bugs. To the best of my
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188 knowledge, there have been no data-loss-causing bugs reported in the
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189 compression/decompression engine of 1.0.0 or 1.0.1.
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190
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191 Note that this release does not improve the rather crude build system
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192 for Unix platforms. The general plan here is to autoconfiscate/
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193 libtoolise 1.0.2 soon after release, and release the result as 1.1.0
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194 or perhaps 1.2.0. That, however, is still just a plan at this point.
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195
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196 Here are the changes in 1.0.2. Bug-reporters and/or patch-senders in
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197 parentheses.
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198
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199 * Fix an infinite segfault loop in 1.0.1 when a directory is
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200 encountered in -f (force) mode.
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201 (Trond Eivind Glomsrod, Nicholas Nethercote, Volker Schmidt)
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202
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203 * Avoid double fclose() of output file on certain I/O error paths.
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204 (Solar Designer)
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205
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206 * Don't fail with internal error 1007 when fed a long stream (> 48MB)
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207 of byte 251. Also print useful message suggesting that 1007s may be
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208 caused by bad memory.
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209 (noticed by Juan Pedro Vallejo, fixed by me)
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210
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211 * Fix uninitialised variable silly bug in demo prog dlltest.c.
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212 (Jorj Bauer)
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213
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214 * Remove 512-MB limitation on recovered file size for bzip2recover
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215 on selected platforms which support 64-bit ints. At the moment
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216 all GCC supported platforms, and Win32.
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217 (me, Alson van der Meulen)
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218
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219 * Hard-code header byte values, to give correct operation on platforms
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220 using EBCDIC as their native character set (IBM's OS/390).
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221 (Leland Lucius)
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222
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223 * Copy file access times correctly.
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224 (Marty Leisner)
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225
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226 * Add distclean and check targets to Makefile.
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227 (Michael Carmack)
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228
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229 * Parameterise use of ar and ranlib in Makefile. Also add $(LDFLAGS).
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230 (Rich Ireland, Bo Thorsen)
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231
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232 * Pass -p (create parent dirs as needed) to mkdir during make install.
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233 (Jeremy Fusco)
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234
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235 * Dereference symlinks when copying file permissions in -f mode.
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236 (Volker Schmidt)
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237
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238 * Majorly simplify implementation of uInt64_qrm10.
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239 (Bo Lindbergh)
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240
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241 * Check the input file still exists before deleting the output one,
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242 when aborting in cleanUpAndFail().
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243 (Joerg Prante, Robert Linden, Matthias Krings)
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244
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245 Also a bunch of patches courtesy of Philippe Troin, the Debian maintainer
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246 of bzip2:
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247
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248 * Wrapper scripts (with manpages): bzdiff, bzgrep, bzmore.
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249
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250 * Spelling changes and minor enhancements in bzip2.1.
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251
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252 * Avoid race condition between creating the output file and setting its
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253 interim permissions safely, by using fopen_output_safely().
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254 No changes to bzip2recover since there is no issue with file
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255 permissions there.
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256
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257 * do not print senseless report with -v when compressing an empty
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258 file.
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259
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260 * bzcat -f works on non-bzip2 files.
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261
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262 * do not try to escape shell meta-characters on unix (the shell takes
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263 care of these).
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264
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265 * added --fast and --best aliases for -1 -9 for gzip compatibility.
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266
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267
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268 1.0.3 (15 Feb 05)
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269 ~~~~~~~~~~~~~~~~~
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270 Fixes some minor bugs since the last version, 1.0.2.
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271
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272 * Further robustification against corrupted compressed data.
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273 There are currently no known bitstreams which can cause the
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274 decompressor to crash, loop or access memory which does not
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275 belong to it. If you are using bzip2 or the library to
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276 decompress bitstreams from untrusted sources, an upgrade
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277 to 1.0.3 is recommended. This fixes CAN-2005-1260.
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278
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279 * The documentation has been converted to XML, from which html
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280 and pdf can be derived.
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281
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282 * Various minor bugs in the documentation have been fixed.
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283
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284 * Fixes for various compilation warnings with newer versions of
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285 gcc, and on 64-bit platforms.
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286
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287 * The BZ_NO_STDIO cpp symbol was not properly observed in 1.0.2.
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288 This has been fixed.
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289
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290
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291 1.0.4 (20 Dec 06)
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292 ~~~~~~~~~~~~~~~~~
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293 Fixes some minor bugs since the last version, 1.0.3.
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294
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295 * Fix file permissions race problem (CAN-2005-0953).
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cannam@89
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296
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cannam@89
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297 * Avoid possible segfault in BZ2_bzclose. From Coverity's NetBSD
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cannam@89
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298 scan.
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cannam@89
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299
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cannam@89
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300 * 'const'/prototype cleanups in the C code.
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cannam@89
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301
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cannam@89
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302 * Change default install location to /usr/local, and handle multiple
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cannam@89
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303 'make install's without error.
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cannam@89
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304
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cannam@89
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305 * Sanitise file names more carefully in bzgrep. Fixes CAN-2005-0758
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cannam@89
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306 to the extent that applies to bzgrep.
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307
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cannam@89
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308 * Use 'mktemp' rather than 'tempfile' in bzdiff.
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cannam@89
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309
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cannam@89
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310 * Tighten up a couple of assertions in blocksort.c following automated
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cannam@89
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311 analysis.
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cannam@89
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312
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cannam@89
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313 * Fix minor doc/comment bugs.
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314
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cannam@89
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315
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316 1.0.5 (10 Dec 07)
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cannam@89
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317 ~~~~~~~~~~~~~~~~~
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cannam@89
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318 Security fix only. Fixes CERT-FI 20469 as it applies to bzip2.
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cannam@89
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319
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cannam@89
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320
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321 1.0.6 (6 Sept 10)
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322 ~~~~~~~~~~~~~~~~~
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cannam@89
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323
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cannam@89
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324 * Security fix for CVE-2010-0405. This was reported by Mikolaj
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cannam@89
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325 Izdebski.
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cannam@89
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326
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cannam@89
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327 * Make the documentation build on Ubuntu 10.04
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