cannam@89: ------------------------------------------------------------------ cannam@89: This file is part of bzip2/libbzip2, a program and library for cannam@89: lossless, block-sorting data compression. cannam@89: cannam@89: bzip2/libbzip2 version 1.0.6 of 6 September 2010 cannam@89: Copyright (C) 1996-2010 Julian Seward cannam@89: cannam@89: Please read the WARNING, DISCLAIMER and PATENTS sections in the cannam@89: README file. cannam@89: cannam@89: This program is released under the terms of the license contained cannam@89: in the file LICENSE. cannam@89: ------------------------------------------------------------------ cannam@89: cannam@89: cannam@89: 0.9.0 cannam@89: ~~~~~ cannam@89: First version. cannam@89: cannam@89: cannam@89: 0.9.0a cannam@89: ~~~~~~ cannam@89: Removed 'ranlib' from Makefile, since most modern Unix-es cannam@89: don't need it, or even know about it. cannam@89: cannam@89: cannam@89: 0.9.0b cannam@89: ~~~~~~ cannam@89: Fixed a problem with error reporting in bzip2.c. This does not effect cannam@89: the library in any way. Problem is: versions 0.9.0 and 0.9.0a (of the cannam@89: program proper) compress and decompress correctly, but give misleading cannam@89: error messages (internal panics) when an I/O error occurs, instead of cannam@89: reporting the problem correctly. This shouldn't give any data loss cannam@89: (as far as I can see), but is confusing. cannam@89: cannam@89: Made the inline declarations disappear for non-GCC compilers. cannam@89: cannam@89: cannam@89: 0.9.0c cannam@89: ~~~~~~ cannam@89: Fixed some problems in the library pertaining to some boundary cases. cannam@89: This makes the library behave more correctly in those situations. The cannam@89: fixes apply only to features (calls and parameters) not used by cannam@89: bzip2.c, so the non-fixedness of them in previous versions has no cannam@89: effect on reliability of bzip2.c. cannam@89: cannam@89: In bzlib.c: cannam@89: * made zero-length BZ_FLUSH work correctly in bzCompress(). cannam@89: * fixed bzWrite/bzRead to ignore zero-length requests. cannam@89: * fixed bzread to correctly handle read requests after EOF. cannam@89: * wrong parameter order in call to bzDecompressInit in cannam@89: bzBuffToBuffDecompress. Fixed. cannam@89: cannam@89: In compress.c: cannam@89: * changed setting of nGroups in sendMTFValues() so as to cannam@89: do a bit better on small files. This _does_ effect cannam@89: bzip2.c. cannam@89: cannam@89: cannam@89: 0.9.5a cannam@89: ~~~~~~ cannam@89: Major change: add a fallback sorting algorithm (blocksort.c) cannam@89: to give reasonable behaviour even for very repetitive inputs. cannam@89: Nuked --repetitive-best and --repetitive-fast since they are cannam@89: no longer useful. cannam@89: cannam@89: Minor changes: mostly a whole bunch of small changes/ cannam@89: bugfixes in the driver (bzip2.c). Changes pertaining to the cannam@89: user interface are: cannam@89: cannam@89: allow decompression of symlink'd files to stdout cannam@89: decompress/test files even without .bz2 extension cannam@89: give more accurate error messages for I/O errors cannam@89: when compressing/decompressing to stdout, don't catch control-C cannam@89: read flags from BZIP2 and BZIP environment variables cannam@89: decline to break hard links to a file unless forced with -f cannam@89: allow -c flag even with no filenames cannam@89: preserve file ownerships as far as possible cannam@89: make -s -1 give the expected block size (100k) cannam@89: add a flag -q --quiet to suppress nonessential warnings cannam@89: stop decoding flags after --, so files beginning in - can be handled cannam@89: resolved inconsistent naming: bzcat or bz2cat ? cannam@89: bzip2 --help now returns 0 cannam@89: cannam@89: Programming-level changes are: cannam@89: cannam@89: fixed syntax error in GET_LL4 for Borland C++ 5.02 cannam@89: let bzBuffToBuffDecompress return BZ_DATA_ERROR{_MAGIC} cannam@89: fix overshoot of mode-string end in bzopen_or_bzdopen cannam@89: wrapped bzlib.h in #ifdef __cplusplus ... extern "C" { ... } cannam@89: close file handles under all error conditions cannam@89: added minor mods so it compiles with DJGPP out of the box cannam@89: fixed Makefile so it doesn't give problems with BSD make cannam@89: fix uninitialised memory reads in dlltest.c cannam@89: cannam@89: 0.9.5b cannam@89: ~~~~~~ cannam@89: Open stdin/stdout in binary mode for DJGPP. cannam@89: cannam@89: 0.9.5c cannam@89: ~~~~~~ cannam@89: Changed BZ_N_OVERSHOOT to be ... + 2 instead of ... + 1. The + 1 cannam@89: version could cause the sorted order to be wrong in some extremely cannam@89: obscure cases. Also changed setting of quadrant in blocksort.c. cannam@89: cannam@89: 0.9.5d cannam@89: ~~~~~~ cannam@89: The only functional change is to make bzlibVersion() in the library cannam@89: return the correct string. This has no effect whatsoever on the cannam@89: functioning of the bzip2 program or library. Added a couple of casts cannam@89: so the library compiles without warnings at level 3 in MS Visual cannam@89: Studio 6.0. Included a Y2K statement in the file Y2K_INFO. All other cannam@89: changes are minor documentation changes. cannam@89: cannam@89: 1.0 cannam@89: ~~~ cannam@89: Several minor bugfixes and enhancements: cannam@89: cannam@89: * Large file support. The library uses 64-bit counters to cannam@89: count the volume of data passing through it. bzip2.c cannam@89: is now compiled with -D_FILE_OFFSET_BITS=64 to get large cannam@89: file support from the C library. -v correctly prints out cannam@89: file sizes greater than 4 gigabytes. All these changes have cannam@89: been made without assuming a 64-bit platform or a C compiler cannam@89: which supports 64-bit ints, so, except for the C library cannam@89: aspect, they are fully portable. cannam@89: cannam@89: * Decompression robustness. The library/program should be cannam@89: robust to any corruption of compressed data, detecting and cannam@89: handling _all_ corruption, instead of merely relying on cannam@89: the CRCs. What this means is that the program should cannam@89: never crash, given corrupted data, and the library should cannam@89: always return BZ_DATA_ERROR. cannam@89: cannam@89: * Fixed an obscure race-condition bug only ever observed on cannam@89: Solaris, in which, if you were very unlucky and issued cannam@89: control-C at exactly the wrong time, both input and output cannam@89: files would be deleted. cannam@89: cannam@89: * Don't run out of file handles on test/decompression when cannam@89: large numbers of files have invalid magic numbers. cannam@89: cannam@89: * Avoid library namespace pollution. Prefix all exported cannam@89: symbols with BZ2_. cannam@89: cannam@89: * Minor sorting enhancements from my DCC2000 paper. cannam@89: cannam@89: * Advance the version number to 1.0, so as to counteract the cannam@89: (false-in-this-case) impression some people have that programs cannam@89: with version numbers less than 1.0 are in some way, experimental, cannam@89: pre-release versions. cannam@89: cannam@89: * Create an initial Makefile-libbz2_so to build a shared library. cannam@89: Yes, I know I should really use libtool et al ... cannam@89: cannam@89: * Make the program exit with 2 instead of 0 when decompression cannam@89: fails due to a bad magic number (ie, an invalid bzip2 header). cannam@89: Also exit with 1 (as the manual claims :-) whenever a diagnostic cannam@89: message would have been printed AND the corresponding operation cannam@89: is aborted, for example cannam@89: bzip2: Output file xx already exists. cannam@89: When a diagnostic message is printed but the operation is not cannam@89: aborted, for example cannam@89: bzip2: Can't guess original name for wurble -- using wurble.out cannam@89: then the exit value 0 is returned, unless some other problem is cannam@89: also detected. cannam@89: cannam@89: I think it corresponds more closely to what the manual claims now. cannam@89: cannam@89: cannam@89: 1.0.1 cannam@89: ~~~~~ cannam@89: * Modified dlltest.c so it uses the new BZ2_ naming scheme. cannam@89: * Modified makefile-msc to fix minor build probs on Win2k. cannam@89: * Updated README.COMPILATION.PROBLEMS. cannam@89: cannam@89: There are no functionality changes or bug fixes relative to version cannam@89: 1.0.0. This is just a documentation update + a fix for minor Win32 cannam@89: build problems. For almost everyone, upgrading from 1.0.0 to 1.0.1 is cannam@89: utterly pointless. Don't bother. cannam@89: cannam@89: cannam@89: 1.0.2 cannam@89: ~~~~~ cannam@89: A bug fix release, addressing various minor issues which have appeared cannam@89: in the 18 or so months since 1.0.1 was released. Most of the fixes cannam@89: are to do with file-handling or documentation bugs. To the best of my cannam@89: knowledge, there have been no data-loss-causing bugs reported in the cannam@89: compression/decompression engine of 1.0.0 or 1.0.1. cannam@89: cannam@89: Note that this release does not improve the rather crude build system cannam@89: for Unix platforms. The general plan here is to autoconfiscate/ cannam@89: libtoolise 1.0.2 soon after release, and release the result as 1.1.0 cannam@89: or perhaps 1.2.0. That, however, is still just a plan at this point. cannam@89: cannam@89: Here are the changes in 1.0.2. Bug-reporters and/or patch-senders in cannam@89: parentheses. cannam@89: cannam@89: * Fix an infinite segfault loop in 1.0.1 when a directory is cannam@89: encountered in -f (force) mode. cannam@89: (Trond Eivind Glomsrod, Nicholas Nethercote, Volker Schmidt) cannam@89: cannam@89: * Avoid double fclose() of output file on certain I/O error paths. cannam@89: (Solar Designer) cannam@89: cannam@89: * Don't fail with internal error 1007 when fed a long stream (> 48MB) cannam@89: of byte 251. Also print useful message suggesting that 1007s may be cannam@89: caused by bad memory. cannam@89: (noticed by Juan Pedro Vallejo, fixed by me) cannam@89: cannam@89: * Fix uninitialised variable silly bug in demo prog dlltest.c. cannam@89: (Jorj Bauer) cannam@89: cannam@89: * Remove 512-MB limitation on recovered file size for bzip2recover cannam@89: on selected platforms which support 64-bit ints. At the moment cannam@89: all GCC supported platforms, and Win32. cannam@89: (me, Alson van der Meulen) cannam@89: cannam@89: * Hard-code header byte values, to give correct operation on platforms cannam@89: using EBCDIC as their native character set (IBM's OS/390). cannam@89: (Leland Lucius) cannam@89: cannam@89: * Copy file access times correctly. cannam@89: (Marty Leisner) cannam@89: cannam@89: * Add distclean and check targets to Makefile. cannam@89: (Michael Carmack) cannam@89: cannam@89: * Parameterise use of ar and ranlib in Makefile. Also add $(LDFLAGS). cannam@89: (Rich Ireland, Bo Thorsen) cannam@89: cannam@89: * Pass -p (create parent dirs as needed) to mkdir during make install. cannam@89: (Jeremy Fusco) cannam@89: cannam@89: * Dereference symlinks when copying file permissions in -f mode. cannam@89: (Volker Schmidt) cannam@89: cannam@89: * Majorly simplify implementation of uInt64_qrm10. cannam@89: (Bo Lindbergh) cannam@89: cannam@89: * Check the input file still exists before deleting the output one, cannam@89: when aborting in cleanUpAndFail(). cannam@89: (Joerg Prante, Robert Linden, Matthias Krings) cannam@89: cannam@89: Also a bunch of patches courtesy of Philippe Troin, the Debian maintainer cannam@89: of bzip2: cannam@89: cannam@89: * Wrapper scripts (with manpages): bzdiff, bzgrep, bzmore. cannam@89: cannam@89: * Spelling changes and minor enhancements in bzip2.1. cannam@89: cannam@89: * Avoid race condition between creating the output file and setting its cannam@89: interim permissions safely, by using fopen_output_safely(). cannam@89: No changes to bzip2recover since there is no issue with file cannam@89: permissions there. cannam@89: cannam@89: * do not print senseless report with -v when compressing an empty cannam@89: file. cannam@89: cannam@89: * bzcat -f works on non-bzip2 files. cannam@89: cannam@89: * do not try to escape shell meta-characters on unix (the shell takes cannam@89: care of these). cannam@89: cannam@89: * added --fast and --best aliases for -1 -9 for gzip compatibility. cannam@89: cannam@89: cannam@89: 1.0.3 (15 Feb 05) cannam@89: ~~~~~~~~~~~~~~~~~ cannam@89: Fixes some minor bugs since the last version, 1.0.2. cannam@89: cannam@89: * Further robustification against corrupted compressed data. cannam@89: There are currently no known bitstreams which can cause the cannam@89: decompressor to crash, loop or access memory which does not cannam@89: belong to it. If you are using bzip2 or the library to cannam@89: decompress bitstreams from untrusted sources, an upgrade cannam@89: to 1.0.3 is recommended. This fixes CAN-2005-1260. cannam@89: cannam@89: * The documentation has been converted to XML, from which html cannam@89: and pdf can be derived. cannam@89: cannam@89: * Various minor bugs in the documentation have been fixed. cannam@89: cannam@89: * Fixes for various compilation warnings with newer versions of cannam@89: gcc, and on 64-bit platforms. cannam@89: cannam@89: * The BZ_NO_STDIO cpp symbol was not properly observed in 1.0.2. cannam@89: This has been fixed. cannam@89: cannam@89: cannam@89: 1.0.4 (20 Dec 06) cannam@89: ~~~~~~~~~~~~~~~~~ cannam@89: Fixes some minor bugs since the last version, 1.0.3. cannam@89: cannam@89: * Fix file permissions race problem (CAN-2005-0953). cannam@89: cannam@89: * Avoid possible segfault in BZ2_bzclose. From Coverity's NetBSD cannam@89: scan. cannam@89: cannam@89: * 'const'/prototype cleanups in the C code. cannam@89: cannam@89: * Change default install location to /usr/local, and handle multiple cannam@89: 'make install's without error. cannam@89: cannam@89: * Sanitise file names more carefully in bzgrep. Fixes CAN-2005-0758 cannam@89: to the extent that applies to bzgrep. cannam@89: cannam@89: * Use 'mktemp' rather than 'tempfile' in bzdiff. cannam@89: cannam@89: * Tighten up a couple of assertions in blocksort.c following automated cannam@89: analysis. cannam@89: cannam@89: * Fix minor doc/comment bugs. cannam@89: cannam@89: cannam@89: 1.0.5 (10 Dec 07) cannam@89: ~~~~~~~~~~~~~~~~~ cannam@89: Security fix only. Fixes CERT-FI 20469 as it applies to bzip2. cannam@89: cannam@89: cannam@89: 1.0.6 (6 Sept 10) cannam@89: ~~~~~~~~~~~~~~~~~ cannam@89: cannam@89: * Security fix for CVE-2010-0405. This was reported by Mikolaj cannam@89: Izdebski. cannam@89: cannam@89: * Make the documentation build on Ubuntu 10.04