64 lines
2.2 KiB
Groff
64 lines
2.2 KiB
Groff
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.\"-
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.\" Copyright 2003-2005 Colin Percival
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.\" All rights reserved
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted providing that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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.\" DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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.\" IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD: src/usr.bin/bsdiff/bsdiff/bsdiff.1,v 1.1 2005/08/06 01:59:05 cperciva Exp $
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.\"
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.Dd May 18, 2003
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.Dt BSDIFF 1
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.Os FreeBSD
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.Sh NAME
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.Nm bsdiff
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.Nd generate a patch between two binary files
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.Sh SYNOPSIS
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.Nm
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.Ao Ar oldfile Ac Ao Ar newfile Ac Ao Ar patchfile Ac
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.Sh DESCRIPTION
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.Nm
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compares
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.Ao Ar oldfile Ac
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to
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.Ao Ar newfile Ac
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and writes to
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.Ao Ar patchfile Ac
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a binary patch suitable for use by bspatch(1).
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When
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.Ao Ar oldfile Ac
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and
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.Ao Ar newfile Ac
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are two versions of an executable program, the
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patches produced are on average a factor of five smaller
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than those produced by any other binary patch tool known
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to the author.
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.Pp
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.Nm
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uses memory equal to 17 times the size of
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.Ao Ar oldfile Ac ,
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and requires
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an absolute minimum working set size of 8 times the size of oldfile.
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.Sh SEE ALSO
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.Xr bspatch 1
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.Sh AUTHORS
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.An Colin Percival Aq cperciva@freebsd.org
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