CHANGES revision 256281
1194612Sed ------------------------------------------------------------------ 2194612Sed This file is part of bzip2/libbzip2, a program and library for 3194612Sed lossless, block-sorting data compression. 4194612Sed 5194612Sed bzip2/libbzip2 version 1.0.6 of 6 September 2010 6194612Sed Copyright (C) 1996-2010 Julian Seward <jseward@bzip.org> 7194612Sed 8194612Sed Please read the WARNING, DISCLAIMER and PATENTS sections in the 9194612Sed README file. 10194612Sed 11194612Sed This program is released under the terms of the license contained 12194612Sed in the file LICENSE. 13194612Sed ------------------------------------------------------------------ 14194612Sed 15195098Sed 16195098Sed0.9.0 17195098Sed~~~~~ 18194612SedFirst version. 19194612Sed 20194612Sed 21194612Sed0.9.0a 22194612Sed~~~~~~ 23194612SedRemoved 'ranlib' from Makefile, since most modern Unix-es 24194612Seddon't need it, or even know about it. 25194612Sed 26194612Sed 27194612Sed0.9.0b 28194612Sed~~~~~~ 29194612SedFixed a problem with error reporting in bzip2.c. This does not effect 30194612Sedthe library in any way. Problem is: versions 0.9.0 and 0.9.0a (of the 31194612Sedprogram proper) compress and decompress correctly, but give misleading 32194612Sederror messages (internal panics) when an I/O error occurs, instead of 33194612Sedreporting the problem correctly. This shouldn't give any data loss 34194612Sed(as far as I can see), but is confusing. 35194612Sed 36194612SedMade the inline declarations disappear for non-GCC compilers. 37194612Sed 38194612Sed 39194612Sed0.9.0c 40194612Sed~~~~~~ 41194612SedFixed some problems in the library pertaining to some boundary cases. 42194612SedThis makes the library behave more correctly in those situations. The 43194612Sedfixes apply only to features (calls and parameters) not used by 44194612Sedbzip2.c, so the non-fixedness of them in previous versions has no 45194612Sedeffect on reliability of bzip2.c. 46194612Sed 47194612SedIn bzlib.c: 48194612Sed * made zero-length BZ_FLUSH work correctly in bzCompress(). 49194612Sed * fixed bzWrite/bzRead to ignore zero-length requests. 50194612Sed * fixed bzread to correctly handle read requests after EOF. 51194612Sed * wrong parameter order in call to bzDecompressInit in 52194612Sed bzBuffToBuffDecompress. Fixed. 53194612Sed 54194612SedIn compress.c: 55194612Sed * changed setting of nGroups in sendMTFValues() so as to 56194612Sed do a bit better on small files. This _does_ effect 57194612Sed bzip2.c. 58194612Sed 59194612Sed 60194612Sed0.9.5a 61194612Sed~~~~~~ 62194612SedMajor change: add a fallback sorting algorithm (blocksort.c) 63194612Sedto give reasonable behaviour even for very repetitive inputs. 64194612SedNuked --repetitive-best and --repetitive-fast since they are 65194612Sedno longer useful. 66194612Sed 67194612SedMinor changes: mostly a whole bunch of small changes/ 68194612Sedbugfixes in the driver (bzip2.c). Changes pertaining to the 69194612Seduser interface are: 70194612Sed 71194612Sed allow decompression of symlink'd files to stdout 72194612Sed decompress/test files even without .bz2 extension 73194612Sed give more accurate error messages for I/O errors 74194612Sed when compressing/decompressing to stdout, don't catch control-C 75194612Sed read flags from BZIP2 and BZIP environment variables 76194612Sed decline to break hard links to a file unless forced with -f 77194612Sed allow -c flag even with no filenames 78194612Sed preserve file ownerships as far as possible 79194612Sed make -s -1 give the expected block size (100k) 80194612Sed add a flag -q --quiet to suppress nonessential warnings 81194612Sed stop decoding flags after --, so files beginning in - can be handled 82194612Sed resolved inconsistent naming: bzcat or bz2cat ? 83194612Sed bzip2 --help now returns 0 84194612Sed 85194612SedProgramming-level changes are: 86194612Sed 87194612Sed fixed syntax error in GET_LL4 for Borland C++ 5.02 88194612Sed let bzBuffToBuffDecompress return BZ_DATA_ERROR{_MAGIC} 89194612Sed fix overshoot of mode-string end in bzopen_or_bzdopen 90194612Sed wrapped bzlib.h in #ifdef __cplusplus ... extern "C" { ... } 91194612Sed close file handles under all error conditions 92194612Sed added minor mods so it compiles with DJGPP out of the box 93194612Sed fixed Makefile so it doesn't give problems with BSD make 94194612Sed fix uninitialised memory reads in dlltest.c 95194612Sed 96194612Sed0.9.5b 97194612Sed~~~~~~ 98194612SedOpen stdin/stdout in binary mode for DJGPP. 99194612Sed 100194612Sed0.9.5c 101194612Sed~~~~~~ 102194612SedChanged BZ_N_OVERSHOOT to be ... + 2 instead of ... + 1. The + 1 103194612Sedversion could cause the sorted order to be wrong in some extremely 104194612Sedobscure cases. Also changed setting of quadrant in blocksort.c. 105194612Sed 106194612Sed0.9.5d 107194612Sed~~~~~~ 108194612SedThe only functional change is to make bzlibVersion() in the library 109194612Sedreturn the correct string. This has no effect whatsoever on the 110194612Sedfunctioning of the bzip2 program or library. Added a couple of casts 111194612Sedso the library compiles without warnings at level 3 in MS Visual 112194612SedStudio 6.0. Included a Y2K statement in the file Y2K_INFO. All other 113194612Sedchanges are minor documentation changes. 114194612Sed 115194612Sed1.0 116194612Sed~~~ 117194612SedSeveral minor bugfixes and enhancements: 118194612Sed 119194612Sed* Large file support. The library uses 64-bit counters to 120194612Sed count the volume of data passing through it. bzip2.c 121194612Sed is now compiled with -D_FILE_OFFSET_BITS=64 to get large 122194612Sed file support from the C library. -v correctly prints out 123194612Sed file sizes greater than 4 gigabytes. All these changes have 124194612Sed been made without assuming a 64-bit platform or a C compiler 125194612Sed which supports 64-bit ints, so, except for the C library 126194612Sed aspect, they are fully portable. 127194612Sed 128194612Sed* Decompression robustness. The library/program should be 129194612Sed robust to any corruption of compressed data, detecting and 130194612Sed handling _all_ corruption, instead of merely relying on 131194612Sed the CRCs. What this means is that the program should 132194612Sed never crash, given corrupted data, and the library should 133194612Sed always return BZ_DATA_ERROR. 134194612Sed 135194612Sed* Fixed an obscure race-condition bug only ever observed on 136194612Sed Solaris, in which, if you were very unlucky and issued 137194612Sed control-C at exactly the wrong time, both input and output 138194612Sed files would be deleted. 139194612Sed 140194612Sed* Don't run out of file handles on test/decompression when 141194612Sed large numbers of files have invalid magic numbers. 142195098Sed 143195098Sed* Avoid library namespace pollution. Prefix all exported 144195098Sed symbols with BZ2_. 145195098Sed 146195098Sed* Minor sorting enhancements from my DCC2000 paper. 147195098Sed 148195098Sed* Advance the version number to 1.0, so as to counteract the 149194612Sed (false-in-this-case) impression some people have that programs 150194612Sed with version numbers less than 1.0 are in some way, experimental, 151194612Sed pre-release versions. 152194612Sed 153194612Sed* Create an initial Makefile-libbz2_so to build a shared library. 154194612Sed Yes, I know I should really use libtool et al ... 155194612Sed 156194612Sed* Make the program exit with 2 instead of 0 when decompression 157194612Sed fails due to a bad magic number (ie, an invalid bzip2 header). 158194612Sed Also exit with 1 (as the manual claims :-) whenever a diagnostic 159194612Sed message would have been printed AND the corresponding operation 160194612Sed is aborted, for example 161194612Sed bzip2: Output file xx already exists. 162194612Sed When a diagnostic message is printed but the operation is not 163194612Sed aborted, for example 164194612Sed bzip2: Can't guess original name for wurble -- using wurble.out 165194612Sed then the exit value 0 is returned, unless some other problem is 166194612Sed also detected. 167194612Sed 168194612Sed I think it corresponds more closely to what the manual claims now. 169194612Sed 170194612Sed 1711.0.1 172~~~~~ 173* Modified dlltest.c so it uses the new BZ2_ naming scheme. 174* Modified makefile-msc to fix minor build probs on Win2k. 175* Updated README.COMPILATION.PROBLEMS. 176 177There are no functionality changes or bug fixes relative to version 1781.0.0. This is just a documentation update + a fix for minor Win32 179build problems. For almost everyone, upgrading from 1.0.0 to 1.0.1 is 180utterly pointless. Don't bother. 181 182 1831.0.2 184~~~~~ 185A bug fix release, addressing various minor issues which have appeared 186in the 18 or so months since 1.0.1 was released. Most of the fixes 187are to do with file-handling or documentation bugs. To the best of my 188knowledge, there have been no data-loss-causing bugs reported in the 189compression/decompression engine of 1.0.0 or 1.0.1. 190 191Note that this release does not improve the rather crude build system 192for Unix platforms. The general plan here is to autoconfiscate/ 193libtoolise 1.0.2 soon after release, and release the result as 1.1.0 194or perhaps 1.2.0. That, however, is still just a plan at this point. 195 196Here are the changes in 1.0.2. Bug-reporters and/or patch-senders in 197parentheses. 198 199* Fix an infinite segfault loop in 1.0.1 when a directory is 200 encountered in -f (force) mode. 201 (Trond Eivind Glomsrod, Nicholas Nethercote, Volker Schmidt) 202 203* Avoid double fclose() of output file on certain I/O error paths. 204 (Solar Designer) 205 206* Don't fail with internal error 1007 when fed a long stream (> 48MB) 207 of byte 251. Also print useful message suggesting that 1007s may be 208 caused by bad memory. 209 (noticed by Juan Pedro Vallejo, fixed by me) 210 211* Fix uninitialised variable silly bug in demo prog dlltest.c. 212 (Jorj Bauer) 213 214* Remove 512-MB limitation on recovered file size for bzip2recover 215 on selected platforms which support 64-bit ints. At the moment 216 all GCC supported platforms, and Win32. 217 (me, Alson van der Meulen) 218 219* Hard-code header byte values, to give correct operation on platforms 220 using EBCDIC as their native character set (IBM's OS/390). 221 (Leland Lucius) 222 223* Copy file access times correctly. 224 (Marty Leisner) 225 226* Add distclean and check targets to Makefile. 227 (Michael Carmack) 228 229* Parameterise use of ar and ranlib in Makefile. Also add $(LDFLAGS). 230 (Rich Ireland, Bo Thorsen) 231 232* Pass -p (create parent dirs as needed) to mkdir during make install. 233 (Jeremy Fusco) 234 235* Dereference symlinks when copying file permissions in -f mode. 236 (Volker Schmidt) 237 238* Majorly simplify implementation of uInt64_qrm10. 239 (Bo Lindbergh) 240 241* Check the input file still exists before deleting the output one, 242 when aborting in cleanUpAndFail(). 243 (Joerg Prante, Robert Linden, Matthias Krings) 244 245Also a bunch of patches courtesy of Philippe Troin, the Debian maintainer 246of bzip2: 247 248* Wrapper scripts (with manpages): bzdiff, bzgrep, bzmore. 249 250* Spelling changes and minor enhancements in bzip2.1. 251 252* Avoid race condition between creating the output file and setting its 253 interim permissions safely, by using fopen_output_safely(). 254 No changes to bzip2recover since there is no issue with file 255 permissions there. 256 257* do not print senseless report with -v when compressing an empty 258 file. 259 260* bzcat -f works on non-bzip2 files. 261 262* do not try to escape shell meta-characters on unix (the shell takes 263 care of these). 264 265* added --fast and --best aliases for -1 -9 for gzip compatibility. 266 267 2681.0.3 (15 Feb 05) 269~~~~~~~~~~~~~~~~~ 270Fixes some minor bugs since the last version, 1.0.2. 271 272* Further robustification against corrupted compressed data. 273 There are currently no known bitstreams which can cause the 274 decompressor to crash, loop or access memory which does not 275 belong to it. If you are using bzip2 or the library to 276 decompress bitstreams from untrusted sources, an upgrade 277 to 1.0.3 is recommended. This fixes CAN-2005-1260. 278 279* The documentation has been converted to XML, from which html 280 and pdf can be derived. 281 282* Various minor bugs in the documentation have been fixed. 283 284* Fixes for various compilation warnings with newer versions of 285 gcc, and on 64-bit platforms. 286 287* The BZ_NO_STDIO cpp symbol was not properly observed in 1.0.2. 288 This has been fixed. 289 290 2911.0.4 (20 Dec 06) 292~~~~~~~~~~~~~~~~~ 293Fixes some minor bugs since the last version, 1.0.3. 294 295* Fix file permissions race problem (CAN-2005-0953). 296 297* Avoid possible segfault in BZ2_bzclose. From Coverity's NetBSD 298 scan. 299 300* 'const'/prototype cleanups in the C code. 301 302* Change default install location to /usr/local, and handle multiple 303 'make install's without error. 304 305* Sanitise file names more carefully in bzgrep. Fixes CAN-2005-0758 306 to the extent that applies to bzgrep. 307 308* Use 'mktemp' rather than 'tempfile' in bzdiff. 309 310* Tighten up a couple of assertions in blocksort.c following automated 311 analysis. 312 313* Fix minor doc/comment bugs. 314 315 3161.0.5 (10 Dec 07) 317~~~~~~~~~~~~~~~~~ 318Security fix only. Fixes CERT-FI 20469 as it applies to bzip2. 319 320 3211.0.6 (6 Sept 10) 322~~~~~~~~~~~~~~~~~ 323 324* Security fix for CVE-2010-0405. This was reported by Mikolaj 325 Izdebski. 326 327* Make the documentation build on Ubuntu 10.04 328