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.Ao Ar oldfile Ac Ao Ar newfile Ac Ao Ar patchfile Ac 37.Sh DESCRIPTION 38.Nm 39compares 40.Ao Ar oldfile Ac 41to 42.Ao Ar newfile Ac 43and writes to 44.Ao Ar patchfile Ac 45a binary patch suitable for use by bspatch(1). 46When 47.Ao Ar oldfile Ac 48and 49.Ao Ar newfile Ac 50are two versions of an executable program, the 51patches produced are on average a factor of five smaller 52than those produced by any other binary patch tool known 53to the author. 54.Pp 55.Nm 56uses memory equal to 17 times the size of 57.Ao Ar oldfile Ac , 58and requires 59an absolute minimum working set size of 8 times the size of oldfile. 60.Sh SEE ALSO 61.Xr bspatch 1 62.Sh AUTHORS 63.An Colin Percival Aq cperciva@freebsd.org 64