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The following list, organized by fdupes version, documents changes
to fdupes. Every item on the list includes, inside square brackets,
a list of indentifiers referring to the people who contributed
that particular item. When more than one person is listed the person
who contributed the patch or idea appears first, followed by
those who've otherwise worked on that item. For a list of
contributors names and identifiers please see the CONTRIBUTORS file.
Changes from 2.0 to 2.0.1 [JLB]
- Hard links were treated as identical in match checking but not in
match confirmation. This version fixes the problem, increasing speed
with file sets involving lots of hard links.
- A few minor efficiency improvements were performed
Changes from 1.51-jody5 to 2.0 [JLB]
- Bumped major version to 2.0 due to the number of behavioral changes
and improvements to the code, plus it looks less messy than the
hyphenated versioning
- Increased "chunk size" for better performance and to solve the disk
thrashing problem when checking two large files for a match
- When using the -H option, hard links now automatically match each
other without performing any file reads
- Changed primary memory allocator to string_alloc by Jody Bruchon
to improve performance over generic malloc/calloc
- Progress indicator now lists the number of duplicate pairs found in
addition to the usual file progress count and completion percentage
- Progress is updated more rapidly when full file comparisons happen
so users are less likely to think fdupes is "frozen"
- Floating point code was made optional and is removed by default
- A comparison script was added to check built fdupes behavior against
whatever fdupes is currently installed on the system
- Added "undocumented" -Q / --quick option which is not fully safe but can
be used to drastically reduce run time for large data sets if some risk
of data loss is acceptable to the user
- Added -O/--paramorder option to sort files by the order their parent
directory set was specified on the command line first. This makes it
possible to choose what directories' files get preserved over others
while using -d and -N together
- The file list loading progress indicator was revamped. Rather than a
simple "spinning pipe" indicator, it now shows the number of files and
directories scanned as well as which command line specified set the
scanning is currently happening in
- fdupes was enhanced to support more than 2 million files total by
changing from 'int' internal sizes to the maximum supported by the
platform being compiled for
- Hard link code was modified to be much safer; now any file is only
permanently deleted after a hard link succeeds
- Hard links on Windows (on supporting filesystems) are now supported
- Hashing code was optimized for a benchmarked 8.4% improvement in file
processing overhead (and much more under typical real-world conditions)
- Hard linking checks for more error conditions and output is much
clearer about what action was taken on any given file
Changes from 1.51-jody4-jkl1 to 1.51-jody5 [JLB]
- Less malloc()s so less memory usage and a slight speedup
- Change --order=name to an intelligent numerically correct sort
- Fixed bug where progress text was missing until first update
- Performance boost for small files (4KB or less) by not running
redundant hashes and comparisons
- Test files added for numerically correct sort ordering
Changes from 1.51-jody4 to 1.51-jody4-jkl1 [JKL]
- added `--xsize=SIZE' option: exclude files of size < SIZE
- updated Makefile: `PREFIX = /usr/local'
- updated README: Usage to reflect curent parameters
Changes from 1.51-jody2 to 1.51-jody4 [JLB]
- Add support for hard linking duplicates with -L switch
- Updated jody_hash algorithm with much lower collision rate
- Remove freopen() call that posed a portability problem
- Improved progress indicator behavior
- Many minor bug fixes
Changes from 1.51 to 1.51-jody2 [JLB]
- Switched to C99
- Replaced MD5 with Jody Bruchon's hash function
- Added a delay to progress indications for better performance
- Removed lots of unused code
- Ported fdupes to Microsoft Windows (with MinGW)
Changes from 1.50 to 1.51
- Added support for 64-bit file offsets on 32-bit systems.
- Using tty for interactive input instead of regular stdin. This is to
allow feeding filenames via stdin in future versions of fdupes without
breaking interactive deletion feature.
- Fixed some typos in --help.
- Turned C++ style comments into C style comments.
Changes from 1.40 to 1.50-PR2
- Fixed memory leak. [JB]
- Added "--summarize" option. [AL]
- Added "--recurse:" selective recursion option. [AL]
- Added "--noprompt" option for totally automated deletion of
duplicate files.
- Now sorts duplicates (old to new) for consistent order when
listing or deleteing duplicate files.
- Now tests for early matching of files, which should help speed up
the matching process when large files are involved.
- Added warning whenever a file cannot be deleted. [CHL, AL]
- Fixed bug where some files would not be closed after failure. [AL]
- Fixed bug where confirmmatch() function wouldn't always deal
properly with zero-length files. [AL]
- Fixed bug where progress indicator would not be cleared
when no files were found. [AL]
- Removed experimental red-black tree code (it was slower on
my system than the default code). [AL]
- Modified md5/md5.c to avoid compiler warning. [CHL]
- Changes to fdupes.c for compilation under platforms where
getopt_long is unavailable. [LR, AL]
- Changes to help text for clarity. [AL]
- Various changes and improvements to Makefile. [PB, AL]
Changes from 1.31 to 1.40
- Added option to omit the first file in each group
of matches. [LM, AL]
- Added escaping of filenames containing spaces when
sameline option is specified. [AL]
- Changed version indicator format from "fdupes version X.Y"
to the simpler "fdupes X.Y". [AL]
- Changed ordering of options appearing in the help
text (--help), manpage, and README file. [AL]
Changes from 1.30 to 1.31
- Added interactive option to preserve all files during
delete procedure (something similar was already in
place, but now it's official). [AL]
- Updated delete procedure prompt format. [AL]
- Cosmetic code changes. [AL]
Changes from 1.20 to 1.30
- Added size option to display size of duplicates. [LB, AL]
- Added missing typecast for proper compilation under g++. [LB]
- Better handling of errors occurring during retrieval
of a file's signature. [KK, AL]
- No longer displays an error message when specified
directories contain no files. [AL]
- Added red-black tree structure (experimental compile-time
option, disabled by default). [AL]
Changes from 1.12 to 1.20
- Fixed bug where program would crash when files being
scanned were named pipes or sockets. [FD]
- Fix against security risk resulting from the use of a
temporary file to store md5sum output. [FD, AL]
- Using an external md5sum program is now optional. Started
using L. Peter Deutsh's MD5 library instead. [FD, AL]
- Added hardlinks option to distinguish between hard links
and actual duplicate files. [FD, AL]
- Added noempty option to exclude zero-length files
from consideration [AL]
Changes from 1.11 to 1.12
- Improved handling of extremely long input on preserve
prompt (delete option). [SSD, AL]
Changes from 1.1 to 1.11
- Started checking file sizes before signatures
for better performance. [AB, AL]
- Added fdupes manpage. [AB, AL]
Changes from 1.0 to 1.1
- Added delete option for semi-automatic deletion
of duplicate files. [AL]