.\"-
.\" Copyright 2003-2005 Colin Percival
.\" All rights reserved
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted providing that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
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.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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.\" IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\"
.\" $FreeBSD: src/usr.bin/bsdiff/bspatch/bspatch.1,v 1.1 2005/08/06 01:59:06 cperciva Exp $
.\"
.Dd May 18, 2003
.Dt BSPATCH 1
.Os FreeBSD
.Sh NAME
.Nm bspatch
.Nd apply a patch built with bsdiff(1)
.Sh SYNOPSIS
.Nm
.Ao Ar oldfile Ac Ao Ar newfile Ac Ao Ar patchfile Ac
.Sh DESCRIPTION
.Nm
generates
.Ao Ar newfile Ac
from
.Ao Ar oldfile Ac
and
.Ao Ar patchfile Ac
where
.Ao Ar patchfile Ac
is a binary patch built by bsdiff(1).
.Pp
.Nm
uses memory equal to the size of 
.Ao Ar oldfile Ac
plus the size of 
.Ao Ar newfile Ac ,
but can tolerate a very small working set without a dramatic loss
of performance.
.Sh SEE ALSO
.Xr bsdiff 1
.Sh AUTHORS
.An Colin Percival Aq cperciva@freebsd.org