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.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@daemonology.net
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