1.\"- 2.\" Copyright 2003-2005 Colin Percival 3.\" All rights reserved 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted providing that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 14.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 16.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 18.\" DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 22.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 23.\" IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 24.\" POSSIBILITY OF SUCH DAMAGE. 25.\" 26.\" $FreeBSD: src/usr.bin/bsdiff/bsdiff/bsdiff.1,v 1.1 2005/08/06 01:59:05 cperciva Exp $ 27.\" 28.Dd May 18, 2003 29.Dt BSDIFF 1 30.Os FreeBSD 31.Sh NAME 32.Nm bsdiff 33.Nd generate a patch between two binary files 34.Sh SYNOPSIS 35.Nm 36.Ar oldfile newfile patchfile 37.Sh DESCRIPTION 38.Nm 39compares 40.Ar oldfile 41to 42.Ar newfile 43and writes to 44.Ar patchfile 45a binary patch suitable for use by 46.Xr bspatch 1 . 47When 48.Ar oldfile 49and 50.Ar newfile 51are two versions of an executable program, the 52patches produced are on average a factor of five smaller 53than those produced by any other binary patch tool known 54to the author. 55.Pp 56.Nm 57uses memory equal to 17 times the size of 58.Ar oldfile , 59and requires 60an absolute minimum working set size of 8 times the size of oldfile. 61.Sh SEE ALSO 62.Xr bspatch 1 63.Sh AUTHORS 64.An Colin Percival Aq cperciva@freebsd.org 65