| 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 1.0.4 of 20 December 2006
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| 6 | Copyright (C) 1996-2006 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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| 296 |
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| 297 | * Avoid possible segfault in BZ2_bzclose. From Coverity's NetBSD
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| 298 | scan.
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| 299 |
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| 300 | * 'const'/prototype cleanups in the C code.
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| 301 |
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| 302 | * Change default install location to /usr/local, and handle multiple
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| 303 | 'make install's without error.
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| 304 |
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| 305 | * Sanitise file names more carefully in bzgrep. Fixes CAN-2005-0758
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| 306 | to the extent that applies to bzgrep.
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| 307 |
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| 308 | * Use 'mktemp' rather than 'tempfile' in bzdiff.
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| 309 |
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| 310 | * Tighten up a couple of assertions in blocksort.c following automated
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| 311 | analysis.
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| 312 |
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| 313 | * Fix minor doc/comment bugs.
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| 314 |
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