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duff - Duplicate file finder
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============================
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Duff is a command-line utility for identifying duplicates in a given set of
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files. It attempts to be usably fast and uses the SHA family of message
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digests as a part of the comparisons.
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The project website is here:
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http://duff.sourceforge.net/
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Duff resides in public Git repository on SourceForge.net:
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git://duff.git.sourceforge.net/gitroot/duff/duff
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The version numbering scheme for duff is as follows:
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* The first number is the major version. This will be updated upon what the
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author considers a round of feature completion.
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* The second number is the minor version number. This is updated for releases
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that include minor new features, or features that do not change the
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functionality of the program.
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* The third number, if present, is the bugfix release number. This indicates
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a release which only fixes bugs present in a previous major or minor release.
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1. License and copyright
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========================
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Duff is copyright (c) 2005 Camilla Berglund <elmindreda@elmindreda.org>
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Duff is licensed under the zlib/libpng license. See the file `COPYING' for
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license details. The license is also included at the top of each source file.
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Duff contains shaX-asaddi.
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Copyright (c) 2001-2003 Allan Saddi <allan@saddi.com>
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See the files `src/sha*.c' and `src/sha*.h' for license details.
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Duff uses the gettext.h convenience header from GNU gettext.
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Copyright (C) 1995-1998, 2000-2002, 2004-2006, 2009 Free Software Foundation,
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Inc. See the `lib/gettex.h' for license details.
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Duff comes with a number of files provided by the GNU autoconf, automake and
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gettext packages. See the individual files in question for license details.
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If you got this source tree from a Git repository then you will need to
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bootstrap the build environment using first `gettextize' and then `autoreconf
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-i'. Note that this requires that GNU autoconf, automake and gettext are
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installed. Also note that running gettextize may cause a few duplicate entries
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in various build files. If you got the source tree using Git, you can remove
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these with `git reset --hard' before moving on.
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If (or once) you have a `configure' script, go ahead and run it. No additional
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magic should be required. If it is, then that's a bug and should be reported.
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This release of duff has been successfully built on the following systems:
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Earlier releases have been successfully built on the following systems:
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Mac OS X 10.6 x86_64 (with MacPorts gettext)
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Red Hat Enterprise 4.0 x86
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Ubuntu Maverick amd64
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The tools used were GCC and GNU or BSD make. However, it should build on most
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Unix systems without modifications.
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See the file `INSTALL'.
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See the accompanying manpage duff(1).
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To read the manpage before installation, use the following command:
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groff -mdoc -Tascii duff.1 | less -R
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On GNU/Linux systems, however, the following command may suffice:
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See the file `HACKING'.
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7. Bugs, feedback and patches
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=============================
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Please send bug reports, feedback, patches and cookies to:
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Camilla Berglund <elmindreda@elmindreda.org>
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Or, if you prefer, you may use the trackers on SF.net to report bugs, submit
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patches or request features:
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http://sourceforge.net/projects/duff
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For more involved discussions, please join the mailing list:
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http://lists.sourceforge.net/lists/listinfo/duff-devel
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8. Credits and thanks
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=====================
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The following (alphabetically listed) people have contributed to duff, either
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by reporting bugs, suggesting new features or submitting patches:
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Allan Saddi <allan@saddi.com>
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...and everyone I forgot. Did I forget you? Drop me an email.
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This is duff the Unix command-line utility, not DUFF the Windows program.
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If you wish to find duplicate files on Windows, use DUFF.
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DUFF also has a SourceForge.net URL:
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http://dff.sourceforge.net/
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Version 0.1 was named `duplicate' and was never released anywhere.
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Version 0.2 was the first release named duff. It lacked a real checksumming
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algorithm, and was thus only released to a few individuals, during the first
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Version 0.3 was the first official release, on November 22, 2005, after a
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long search for a suitably licensed implementation of SHA1.
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Version 0.3.1 was a bugfix release, on November 27, 2005, adding a single
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feature (-z), which just happened to get included.
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Version 0.4 was the second feature release, on January 13, 2006, adding a
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number of missing and/or requested features as well as bug fixes. It was the
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first release to be considered stable and safe enough for everyday use.
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Version 0.5 was the third feature release, on April 11, 2011, adding a number
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of minor features and fixing a number of bugs. It was mostly intended to get
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the ball rolling again and thus low on features.
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Version 0.5.1 was a bugfix release, on January 17, 2012, adding a single bugfix
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and a new default cluster header for thorough mode.
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Version 0.5.2 was an minor release, on January 29, 2012, adding a number of
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optimizations, prefixing error and warning messages with the program name and
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modifying the default sampling limit.
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README
