lziprecover/ChangeLog

2025-01-08  Antonio Diaz Diaz  <antonio@gnu.org>

	* Version 1.25 released.
	* New options '-F, --fec', '-0' to '-9', '-b, --block-size',
	  '--fec-file', '-r, --recursive', and '-R, --dereference-recursive'.
	* Change short name of option '--byte-repair' to '-B'.
	* byte_repair.cc: Repair a nonzero first LZMA byte.
	* Make '-i' ignore empty members and nonzero first LZMA byte.
	* Rename option '--clear-marking' to '--nonzero-repair'.
	* Remove options '--empty-error' and '--marking-error'.
	* decoder.cc (decode_member): Remove support for Sync Flush marker.
	* merge.cc (copy_file): Add name arguments, use 'show_file_error'.
	* lziprecover.texi: New chapter 'Syntax of command-line arguments'.
	* check.sh: Use 'cp' instead of 'cat'.
	* testsuite: Require lzip/clzip. Change several test files.

2024-01-20  Antonio Diaz Diaz  <antonio@gnu.org>

	* Version 1.24 released.
	* New options '--empty-error', '--marking-error', '--clear-marking'.
	* dump_remove.cc, main.cc: Accept 'empty' in --dump, --remove, --strip.
	* main.cc: Rename '--repair' to '--byte-repair'.
	  Rename '--debug-repair' to '--debug-byte-repair'.
	  Reformat file diagnostics as 'PROGRAM: FILE: MESSAGE'.
	  (show_option_error): New function showing argument and option name.
	  (main): Make -o preserve date/mode/owner if 1 input file.
	  (open_outstream): Create missing intermediate directories.
	* lzip.h: Rename verify_* to check_*.
	* repair.cc: Rename to byte_repair.cc.
	* unzcrash.cc: Rename '--no-verify' to '--no-check'.
	* configure, Makefile.in: New variable 'MAKEINFO'.
	* Makefile.in: Remove target 'install-as-lzip'; -e needs a real lzip.
	* testsuite: New test files test_3m.txt.lz.md5, fox6_mark.lz.

2022-01-21  Antonio Diaz Diaz  <antonio@gnu.org>

	* Version 1.23 released.
	* Decompression time has been reduced by 5-12% depending on the file.
	* main_common.cc (getnum): Show option name and valid range if error.
	* dump_remove.cc (dump_members): Check tty except for --dump=tdata.
	* Option '-U, --unzcrash' now takes an argument ('1' or 'B<size>').
	* mtester.cc (duplicate_buffer): Use an external buffer.
	* repair.cc (debug_decompress): Continue decoding on CRC mismatch.
	* unzcrash.cc: Make zcmp_command a string of unlimited size.
	  Use execvp instead of popen to avoid invoking /bin/sh.
	  Print byte or block position in messages.
	* New file common.h.
	* Improve several descriptions in manual, '--help', and man page.
	* lziprecover.texi: Change GNU Texinfo category to 'Compression'.
	  (Reported by Alfred M. Szmidt).

2021-01-02  Antonio Diaz Diaz  <antonio@gnu.org>

	* Version 1.22 released.
	* New options '-e, --reproduce', '--lzip-level', '--lzip-name',
	  '--reference-file', and '-E, --debug-reproduce'.
	* Remove '--dump-tdata', '--remove-tdata', and '--strip-tdata'.
	* main.cc (main): Report an error if a file name is empty.
	  Make '-o' behave like '-c', but writing to file.
	  Make '-c' and '-o' check whether the output is a terminal only once.
	  Do not open output if input is a terminal.
	* main.cc (decompress): With '-i', ignore data errors, keep files.
	* range_dec.cc: '-i -D' now decompresses a truncated last member.
	* '-i -D' now returns 0 if only ignored errors are found.
	* '-i' now considers any block > 36 with header a member, not a gap.
	* Replace 'decompressed', 'compressed' with 'out', 'in' in output.
	* Fix several compiler warnings. (Reported by Nissanka Gooneratne).
	* lzip_index.cc: Improve messages for corruption in last header.
	* New debug options '-M, --md5sum' and '-U, --unzcrash'.
	* main.cc: Set a valid invocation_name even if argc == 0.
	* Document extraction from tar.lz in manual, '--help', and man page.
	* New files lunzcrash.cc, md5.h, md5.cc, nrep_stats.cc, reproduce.cc.
	* lziprecover.texi: New chapter 'Reproducing one sector'.
	  New sections 'Merging with a backup' and 'Reproducing a mailbox'.
	  Document the debug options for experts.
	* check.sh: Lzip 1.16 or newer is required to run the tests.
	* testsuite: Add 9 new test files.

2019-01-04  Antonio Diaz Diaz  <antonio@gnu.org>

	* Version 1.21 released.
	* Rename File_* to Lzip_*.
	* New options '--dump', '--remove', and '--strip'. They
	  replace '--dump-tdata', '--remove-tdata', and '--strip-tdata',
	  which are now aliases and will be removed in version 1.22.
	* lzip.h (Lzip_trailer): New function 'verify_consistency'.
	* lzip_index.cc: Lzip_index now detects gaps between members,
	  some kinds of corrupt trailers and
	  some fake trailers embedded in trailing data.
	* split.cc: Use Lzip_index to split members, gaps and trailing data.
	* split.cc: Check last member before writing anything.
	* list.cc (list_files): With '-i', ignore format errors, show gaps.
	* range_dec.cc: With '-i', ignore a truncated last member.
	* main.cc (main): Check return value of close( infd ).
	* Improve and add new diagnostic messages.
	* Print '\n' instead of '\r' if !isatty( 1 ) in merge, repair.
	* main.cc: Compile on DOS with DJGPP.
	* lziprecover.texi: New chapter 'Tarlz'.
	* configure: Accept appending to CXXFLAGS; 'CXXFLAGS+=OPTIONS'.
	* INSTALL: Document use of CXXFLAGS+='-D __USE_MINGW_ANSI_STDIO'.
	* testsuite: New test files fox.lz, fox6_sc[1-6].lz.

2018-02-12  Antonio Diaz Diaz  <antonio@gnu.org>

	* Version 1.20 released.
	* split.cc: Fix splitting of files > 64 KiB broken since 1.16.
	* New options '--dump-tdata', '--remove-tdata', '--strip-tdata', and
	  '--loose-trailing'.
	* Improve corrupt header detection to HD=3.
	* main.cc: Show corrupt or truncated header in multimember file.
	* Replace 'bits/byte' with inverse compression ratio in output.
	* Show progress of decompression at verbosity level 2 (-vv).
	* Show progress of decompression only if stderr is a terminal.
	* main.cc: Show final diagnostic when testing multiple files.
	* decoder.cc (verify_trailer): Show stored sizes also in hex.
	  Show dictionary size at verbosity level 4 (-vvvv).

2017-04-10  Antonio Diaz Diaz  <antonio@gnu.org>

	* Version 1.19 released.
	* merge.cc: Fix members with thousands of scattered errors.
	* Option '-a' now works with '-l' and '-D'.
	* The output of option '-l, --list' has been simplified.
	* main.cc: Continue testing if any input file is a terminal.
	* main.cc: Show trailing data in both hexadecimal and ASCII.
	* lzip_index.cc: Improve detection of bad dict and trailing data.
	* lzip_index.cc: Skip trailing data more efficiently.
	* lzip.h: Unify messages for bad magic, trailing data, etc.
	* New struct Bad_byte allows delta and flip modes for bad_value.
	* unzcrash.cc: New option '-e, --set-byte'.

2016-05-12  Antonio Diaz Diaz  <antonio@gnu.org>

	* Version 1.18 released.
	* New option '-a, --trailing-error'.
	* merge.cc (open_input_files): Use CRC to test identical files.
	* repair.cc (repair_file): Detect gross damage before repairing.
	* repair.cc: Repair a damaged dictionary size in the header.
	* repair.cc: Try bytes at offsets 7 to 11 first.
	* Decompression time has been reduced by 2%.
	* main.cc (main): Delete '--output' file if infd is a terminal.
	  (main): Don't use stdin more than once.
	  (decompress): Print 6 bytes of trailing data at verbosity level 4.
	* decoder.cc (verify_trailer): Remove test of final code.
	* Use 'close_and_set_permissions' and 'set_signals' in all modes.
	* range_dec.cc (list_file): Show dictionary size and size of
	  trailing data (if any) with '-lv'.
	* New options '-A, --alone-to-lz', '-W, --debug-decompress', and
	  '-X, --show-packets'.
	* Change short name of option '--debug-delay' to '-Y'.
	* Change short name of option '--debug-repair' to '-Z'.
	* unzcrash.cc: New options '-B, --block', '-d, --delta',
	  '-t, --truncate', and '-z, --zcmp'.
	* unzcrash.cc: Read files as large as RAM allows.
	* unzcrash.cc: Compare output using zcmp if decompressor returns 0.
	* unzcrash.cc: Accept negative position and size.
	* lziprecover.texi: New chapter 'Trailing data'.
	* configure: Avoid warning on some shells when testing for g++.
	* Makefile.in: Detect the existence of install-info.
	* check.sh: Require a POSIX shell. Don't check error messages.

2015-05-28  Antonio Diaz Diaz  <antonio@gnu.org>

	* Version 1.17 released.
	* New block selection algorithm makes merge up to 100 times faster.
	* repair.cc: Repair time has been reduced by 15%.
	* New options '-y, --debug-delay' and '-z, --debug-repair'.
	* Makefile.in: New targets 'install*-compress'.
	* testsuite/unzcrash.cc: Move to top directory.
	* lziprecover.texi: New chapter 'File names'.

2014-08-29  Antonio Diaz Diaz  <antonio@gnu.org>

	* Version 1.16 released.
	* New class LZ_mtester makes repair up to 10 times faster.
	* main.cc (close_and_set_permissions): Behave like 'cp -p'.
	* lziprecover.texinfo: Rename to lziprecover.texi.
	* Change license to GPL version 2 or later.

2013-09-14  Antonio Diaz Diaz  <antonio@gnu.org>

	* Version 1.15 released.
	* repair.cc: Repair multimember files with up to one byte error per
	  member.
	* merge.cc: Merge multimember files.
	* main.cc (show_header): Don't show header version.
	* lziprecover.texinfo: New chapters 'Repairing files',
	  'Merging files', and 'Unzcrash'.

2013-05-31  Antonio Diaz Diaz  <antonio@gnu.org>

	* Version 1.14 released.
	* New option '-i, --ignore-errors'.
	* Option '-l, --list' now accepts more than one file.
	* Decompression time has been reduced by 12%.
	* split.cc: Use as few digits as possible in file names.
	  In verbose mode show names of files being created.
	* main.cc (show_header): Show header version if verbosity >= 4.
	  (main): Use 'setmode' instead of '_setmode' on Windows and OS/2.
	* configure: Options now accept a separate argument.
	* Makefile.in: New targets 'install-as-lzip' and 'install-bin'.

2012-02-24  Antonio Diaz Diaz  <ant_diaz@teleline.es>

	* Version 1.13 released.
	* Lziprecover is now distributed in its own package. Until version
	  1.12 it was included in the lzip package. Previous entries in this
	  file are taken from there.
	* lziprecover.cc: Rename to main.cc.
	* New files merge.cc, repair.cc, split.cc, and range_dec.cc.
	* main.cc: Add decompressor options (-c, -d, -k, -t) so that an
	  external decompressor is not needed for recovery and 'make check'.
	* New option '-D, --range-decompress', which extracts a range of
	  bytes decompressing only the members containing the desired data.
	* New option '-l, --list', which prints correct total file sizes
	  even for multimember files.
	* merge.cc, repair.cc: Remove output file if recovery fails.
	* Change quote characters in messages as advised by GNU Standards.
	* split.cc: Use Boyer-Moore algorithm to search for headers.
	* configure: Rename 'datadir' to 'datarootdir'.

2011-04-30  Antonio Diaz Diaz  <ant_diaz@teleline.es>

	* Version 1.12 released.
	* lziprecover.cc: If '-v' is not specified show errors only.
	* unzcrash.cc: Use Arg_parser.
	  New options '-b, --bits', '-p, --position', and '-s, --size'.

2010-09-16  Antonio Diaz Diaz  <ant_diaz@teleline.es>

	* Version 1.11 released.
	* decoder.cc (decode_member): Detect file errors earlier to improve
	  efficiency of lziprecover's new repair capability.
	  This change also prevents (harmless) access to uninitialized
	  memory when decompressing a corrupt file.
	* lziprecover.cc: New option '-m, --merge', which tries to produce a
	  correct file by merging the good parts of two or more damaged copies.
	  New option '-R, --repair' for repairing a 1-byte error in
	  single-member files.
	  New options '-f, --force' and '-o, --output'.
	  New option '-s, --split' to select the until now only operation of
	  splitting multimember files.
	  If no operation is specified, warn the user and do nothing.

2009-06-22  Antonio Diaz Diaz  <ant_diaz@teleline.es>

	* Version 1.6 released.
	* lziprecover.1: New man page.
	* check.sh: Test lziprecover.

2009-01-24  Antonio Diaz Diaz  <ant_diaz@teleline.es>

	* Version 1.4 released.
	* Add 'lziprecover', a member recoverer program.
	* unzcrash.cc: Test all 1-byte errors.


Copyright (C) 2009-2025 Antonio Diaz Diaz.

This file is a collection of facts, and thus it is not copyrightable, but just
in case, you have unlimited permission to copy, distribute, and modify it.