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duff - Duplicate file finder ============================ 0. Introduction =============== Duff is a command-line utility for identifying duplicates in a given set of files. It attempts to be usably fast, and uses SHA1 checksums as a part of the comparisons. The project website is here: http://duff.sourceforge.net/ Duff resides in public CVS on cvs.sourceforge.net. The CVSROOT for anonymous, read-only access is: :pserver:email@example.com:/cvsroot/duff The CVS module for duff 0.x is `duff'. The version numbering scheme for duff is as follows: * The first number is the major version. This will be updated upon what the author considers a round of feature completion. The only feature currently missing for the next major release is i18n. * The second number is the minor version number. This is updated for releases that include minor new features, or features that do not change the functionality of the program. * The third number, if present, is the bugfix release number. This indicates a release which only fixes bugs present in a previous major or minor release. 1. License and copyright ======================== Duff is copyright (c) 2005 Camilla Berglund <firstname.lastname@example.org> Duff is licensed under the zlib/libpng license. See the file `COPYING' for license details. The license is also included at the top of each source file. Duff contains sha1-asaddi. Copyright (c) 2001-2003 Allan Saddi <email@example.com> See the files `sha1.c' or `sha1.h' for license details. 2. Project news =============== See the file `NEWS'. 3. Building Duff ================ If you got this source tree from a CVS repository, you will need to bootstrap the build environment using `bootstrap.sh'. Note that this script requires autoconf and automake to run. If (or once) you have a `configure' script, go ahead and run it. No additional magic should be required. If it is, then that's a bug and should be reported. This release of duff has been successfully built on the following systems: Arch Linux x86 Darwin 7.9.0 powerpc Debian Etch powerpc Debian Sarge alpha FreeBSD 4.11 x86 FreeBSD 5.4 x86 NetBSD 1.6.1 sparc SunOS 5.9 sparc64 Ubuntu Breezy x86 Earlier releases have been successfully built on the following systems: Arch Linux x86 Darwin 7.9.0 powerpc Debian Etch powerpc Debian Sarge alpha FreeBSD 4.11 x86 FreeBSD 5.4 x86 SunOS 5.9 sparc64 The tools used were gcc and GNU or BSD make. However, it should build on most Unix systems without modifications. 4. Installing Duff ================== See the file `INSTALL'. 5. Using Duff ============= See the accompanying manpage duff(1). To read the manpage before installation, use the following command: groff -mdoc -Tascii duff.1 | less -R On Linux systems, however, the following command may suffice: man -l duff.1 6. Hacking Duff =============== See the file `HACKING'. 7. Bugs, feedback and patches ============================= Please send bug reports, feedback, patches and cookies to: Camilla Berglund <firstname.lastname@example.org> For more involved discussions, please join the mailing list: http://lists.sourceforge.net/lists/listinfo/duff-devel 8. Disambiguation ================= This is duff, the Unix command-line utility, and not DUFF, the Windows program. If you wish to find duplicate files on Windows, use DUFF. 9. Release history =================== Version 0.1 was named `duplicate', and was never released anywhere. Version 0.2 was the first release named duff. It lacked a real checksumming algorithm, and was thus only released to a few individuals, during the first half of 2005. Version 0.3 was the first official release, on November 22, 2005, after a prolonged search for a suitably licensed implementation of SHA1. Version 0.3.1 was a bugfix release, on November 27, 2005, adding a single feature (-z), which just happened to get included. Version 0.4 was the second feature release, on January 13, 2006, adding a number of missing and/or requested features as well as bug fixes. It was the first release to be considered stable and safe enough for everyday use. Version 0.5 improves the algorithm that searches for duplicates by sorting the list of entries. The changes to this version were contributed by James Craig Burley <email@example.com>.