| ------------------------------------------------------------------ | |
| This file is part of bzip2/libbzip2, a program and library for | |
| lossless, block-sorting data compression. | |
| bzip2/libbzip2 version 1.0.5 of 10 December 2007 | |
| Copyright (C) 1996-2007 Julian Seward <jseward@bzip.org> | |
| Please read the WARNING, DISCLAIMER and PATENTS sections in the | |
| README file. | |
| This program is released under the terms of the license contained | |
| in the file LICENSE. | |
| ------------------------------------------------------------------ | |
| 0.9.0 | |
| ~~~~~ | |
| First version. | |
| 0.9.0a | |
| ~~~~~~ | |
| Removed 'ranlib' from Makefile, since most modern Unix-es | |
| don't need it, or even know about it. | |
| 0.9.0b | |
| ~~~~~~ | |
| Fixed a problem with error reporting in bzip2.c. This does not effect | |
| the library in any way. Problem is: versions 0.9.0 and 0.9.0a (of the | |
| program proper) compress and decompress correctly, but give misleading | |
| error messages (internal panics) when an I/O error occurs, instead of | |
| reporting the problem correctly. This shouldn't give any data loss | |
| (as far as I can see), but is confusing. | |
| Made the inline declarations disappear for non-GCC compilers. | |
| 0.9.0c | |
| ~~~~~~ | |
| Fixed some problems in the library pertaining to some boundary cases. | |
| This makes the library behave more correctly in those situations. The | |
| fixes apply only to features (calls and parameters) not used by | |
| bzip2.c, so the non-fixedness of them in previous versions has no | |
| effect on reliability of bzip2.c. | |
| In bzlib.c: | |
| * made zero-length BZ_FLUSH work correctly in bzCompress(). | |
| * fixed bzWrite/bzRead to ignore zero-length requests. | |
| * fixed bzread to correctly handle read requests after EOF. | |
| * wrong parameter order in call to bzDecompressInit in | |
| bzBuffToBuffDecompress. Fixed. | |
| In compress.c: | |
| * changed setting of nGroups in sendMTFValues() so as to | |
| do a bit better on small files. This _does_ effect | |
| bzip2.c. | |
| 0.9.5a | |
| ~~~~~~ | |
| Major change: add a fallback sorting algorithm (blocksort.c) | |
| to give reasonable behaviour even for very repetitive inputs. | |
| Nuked --repetitive-best and --repetitive-fast since they are | |
| no longer useful. | |
| Minor changes: mostly a whole bunch of small changes/ | |
| bugfixes in the driver (bzip2.c). Changes pertaining to the | |
| user interface are: | |
| allow decompression of symlink'd files to stdout | |
| decompress/test files even without .bz2 extension | |
| give more accurate error messages for I/O errors | |
| when compressing/decompressing to stdout, don't catch control-C | |
| read flags from BZIP2 and BZIP environment variables | |
| decline to break hard links to a file unless forced with -f | |
| allow -c flag even with no filenames | |
| preserve file ownerships as far as possible | |
| make -s -1 give the expected block size (100k) | |
| add a flag -q --quiet to suppress nonessential warnings | |
| stop decoding flags after --, so files beginning in - can be handled | |
| resolved inconsistent naming: bzcat or bz2cat ? | |
| bzip2 --help now returns 0 | |
| Programming-level changes are: | |
| fixed syntax error in GET_LL4 for Borland C++ 5.02 | |
| let bzBuffToBuffDecompress return BZ_DATA_ERROR{_MAGIC} | |
| fix overshoot of mode-string end in bzopen_or_bzdopen | |
| wrapped bzlib.h in #ifdef __cplusplus ... extern "C" { ... } | |
| close file handles under all error conditions | |
| added minor mods so it compiles with DJGPP out of the box | |
| fixed Makefile so it doesn't give problems with BSD make | |
| fix uninitialised memory reads in dlltest.c | |
| 0.9.5b | |
| ~~~~~~ | |
| Open stdin/stdout in binary mode for DJGPP. | |
| 0.9.5c | |
| ~~~~~~ | |
| Changed BZ_N_OVERSHOOT to be ... + 2 instead of ... + 1. The + 1 | |
| version could cause the sorted order to be wrong in some extremely | |
| obscure cases. Also changed setting of quadrant in blocksort.c. | |
| 0.9.5d | |
| ~~~~~~ | |
| The only functional change is to make bzlibVersion() in the library | |
| return the correct string. This has no effect whatsoever on the | |
| functioning of the bzip2 program or library. Added a couple of casts | |
| so the library compiles without warnings at level 3 in MS Visual | |
| Studio 6.0. Included a Y2K statement in the file Y2K_INFO. All other | |
| changes are minor documentation changes. | |
| 1.0 | |
| ~~~ | |
| Several minor bugfixes and enhancements: | |
| * Large file support. The library uses 64-bit counters to | |
| count the volume of data passing through it. bzip2.c | |
| is now compiled with -D_FILE_OFFSET_BITS=64 to get large | |
| file support from the C library. -v correctly prints out | |
| file sizes greater than 4 gigabytes. All these changes have | |
| been made without assuming a 64-bit platform or a C compiler | |
| which supports 64-bit ints, so, except for the C library | |
| aspect, they are fully portable. | |
| * Decompression robustness. The library/program should be | |
| robust to any corruption of compressed data, detecting and | |
| handling _all_ corruption, instead of merely relying on | |
| the CRCs. What this means is that the program should | |
| never crash, given corrupted data, and the library should | |
| always return BZ_DATA_ERROR. | |
| * Fixed an obscure race-condition bug only ever observed on | |
| Solaris, in which, if you were very unlucky and issued | |
| control-C at exactly the wrong time, both input and output | |
| files would be deleted. | |
| * Don't run out of file handles on test/decompression when | |
| large numbers of files have invalid magic numbers. | |
| * Avoid library namespace pollution. Prefix all exported | |
| symbols with BZ2_. | |
| * Minor sorting enhancements from my DCC2000 paper. | |
| * Advance the version number to 1.0, so as to counteract the | |
| (false-in-this-case) impression some people have that programs | |
| with version numbers less than 1.0 are in some way, experimental, | |
| pre-release versions. | |
| * Create an initial Makefile-libbz2_so to build a shared library. | |
| Yes, I know I should really use libtool et al ... | |
| * Make the program exit with 2 instead of 0 when decompression | |
| fails due to a bad magic number (ie, an invalid bzip2 header). | |
| Also exit with 1 (as the manual claims :-) whenever a diagnostic | |
| message would have been printed AND the corresponding operation | |
| is aborted, for example | |
| bzip2: Output file xx already exists. | |
| When a diagnostic message is printed but the operation is not | |
| aborted, for example | |
| bzip2: Can't guess original name for wurble -- using wurble.out | |
| then the exit value 0 is returned, unless some other problem is | |
| also detected. | |
| I think it corresponds more closely to what the manual claims now. | |
| 1.0.1 | |
| ~~~~~ | |
| * Modified dlltest.c so it uses the new BZ2_ naming scheme. | |
| * Modified makefile-msc to fix minor build probs on Win2k. | |
| * Updated README.COMPILATION.PROBLEMS. | |
| There are no functionality changes or bug fixes relative to version | |
| 1.0.0. This is just a documentation update + a fix for minor Win32 | |
| build problems. For almost everyone, upgrading from 1.0.0 to 1.0.1 is | |
| utterly pointless. Don't bother. | |
| 1.0.2 | |
| ~~~~~ | |
| A bug fix release, addressing various minor issues which have appeared | |
| in the 18 or so months since 1.0.1 was released. Most of the fixes | |
| are to do with file-handling or documentation bugs. To the best of my | |
| knowledge, there have been no data-loss-causing bugs reported in the | |
| compression/decompression engine of 1.0.0 or 1.0.1. | |
| Note that this release does not improve the rather crude build system | |
| for Unix platforms. The general plan here is to autoconfiscate/ | |
| libtoolise 1.0.2 soon after release, and release the result as 1.1.0 | |
| or perhaps 1.2.0. That, however, is still just a plan at this point. | |
| Here are the changes in 1.0.2. Bug-reporters and/or patch-senders in | |
| parentheses. | |
| * Fix an infinite segfault loop in 1.0.1 when a directory is | |
| encountered in -f (force) mode. | |
| (Trond Eivind Glomsrod, Nicholas Nethercote, Volker Schmidt) | |
| * Avoid double fclose() of output file on certain I/O error paths. | |
| (Solar Designer) | |
| * Don't fail with internal error 1007 when fed a long stream (> 48MB) | |
| of byte 251. Also print useful message suggesting that 1007s may be | |
| caused by bad memory. | |
| (noticed by Juan Pedro Vallejo, fixed by me) | |
| * Fix uninitialised variable silly bug in demo prog dlltest.c. | |
| (Jorj Bauer) | |
| * Remove 512-MB limitation on recovered file size for bzip2recover | |
| on selected platforms which support 64-bit ints. At the moment | |
| all GCC supported platforms, and Win32. | |
| (me, Alson van der Meulen) | |
| * Hard-code header byte values, to give correct operation on platforms | |
| using EBCDIC as their native character set (IBM's OS/390). | |
| (Leland Lucius) | |
| * Copy file access times correctly. | |
| (Marty Leisner) | |
| * Add distclean and check targets to Makefile. | |
| (Michael Carmack) | |
| * Parameterise use of ar and ranlib in Makefile. Also add $(LDFLAGS). | |
| (Rich Ireland, Bo Thorsen) | |
| * Pass -p (create parent dirs as needed) to mkdir during make install. | |
| (Jeremy Fusco) | |
| * Dereference symlinks when copying file permissions in -f mode. | |
| (Volker Schmidt) | |
| * Majorly simplify implementation of uInt64_qrm10. | |
| (Bo Lindbergh) | |
| * Check the input file still exists before deleting the output one, | |
| when aborting in cleanUpAndFail(). | |
| (Joerg Prante, Robert Linden, Matthias Krings) | |
| Also a bunch of patches courtesy of Philippe Troin, the Debian maintainer | |
| of bzip2: | |
| * Wrapper scripts (with manpages): bzdiff, bzgrep, bzmore. | |
| * Spelling changes and minor enhancements in bzip2.1. | |
| * Avoid race condition between creating the output file and setting its | |
| interim permissions safely, by using fopen_output_safely(). | |
| No changes to bzip2recover since there is no issue with file | |
| permissions there. | |
| * do not print senseless report with -v when compressing an empty | |
| file. | |
| * bzcat -f works on non-bzip2 files. | |
| * do not try to escape shell meta-characters on unix (the shell takes | |
| care of these). | |
| * added --fast and --best aliases for -1 -9 for gzip compatibility. | |
| 1.0.3 (15 Feb 05) | |
| ~~~~~~~~~~~~~~~~~ | |
| Fixes some minor bugs since the last version, 1.0.2. | |
| * Further robustification against corrupted compressed data. | |
| There are currently no known bitstreams which can cause the | |
| decompressor to crash, loop or access memory which does not | |
| belong to it. If you are using bzip2 or the library to | |
| decompress bitstreams from untrusted sources, an upgrade | |
| to 1.0.3 is recommended. This fixes CAN-2005-1260. | |
| * The documentation has been converted to XML, from which html | |
| and pdf can be derived. | |
| * Various minor bugs in the documentation have been fixed. | |
| * Fixes for various compilation warnings with newer versions of | |
| gcc, and on 64-bit platforms. | |
| * The BZ_NO_STDIO cpp symbol was not properly observed in 1.0.2. | |
| This has been fixed. | |
| 1.0.4 (20 Dec 06) | |
| ~~~~~~~~~~~~~~~~~ | |
| Fixes some minor bugs since the last version, 1.0.3. | |
| * Fix file permissions race problem (CAN-2005-0953). | |
| * Avoid possible segfault in BZ2_bzclose. From Coverity's NetBSD | |
| scan. | |
| * 'const'/prototype cleanups in the C code. | |
| * Change default install location to /usr/local, and handle multiple | |
| 'make install's without error. | |
| * Sanitise file names more carefully in bzgrep. Fixes CAN-2005-0758 | |
| to the extent that applies to bzgrep. | |
| * Use 'mktemp' rather than 'tempfile' in bzdiff. | |
| * Tighten up a couple of assertions in blocksort.c following automated | |
| analysis. | |
| * Fix minor doc/comment bugs. | |
| 1.0.5 (10 Dec 07) | |
| ~~~~~~~~~~~~~~~~~ | |
| Security fix only. Fixes CERT-FI 20469 as it applies to bzip2. | |