87 lines
2.4 KiB
Groff
87 lines
2.4 KiB
Groff
.\"-
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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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.\" $FreeBSD$
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.\"
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.Dd May 18, 2003
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.Dt BSPATCH 1
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.Os
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.Sh NAME
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.Nm bspatch
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.Nd apply a patch built with
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.Xr bsdiff 1
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.Sh SYNOPSIS
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.Nm
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.Ar oldfile newfile patchfile
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.Sh DESCRIPTION
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The
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.Nm
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utility
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generates
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.Ar newfile
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from
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.Ar oldfile
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and
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.Ar patchfile
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where
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.Ar patchfile
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is a binary patch built by
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.Xr bsdiff 1 .
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.Pp
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The
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.Nm
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utility
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uses memory equal to the size of
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.Ar oldfile
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plus the size of
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.Ar newfile ,
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but can tolerate a very small working set without a dramatic loss
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of performance.
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.Sh SEE ALSO
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.Xr bsdiff 1
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.Sh AUTHORS
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.An Colin Percival Aq Mt cperciva@FreeBSD.org
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.Sh BUGS
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The
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.Nm
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utility does not verify that
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.Ar oldfile
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is the correct source file for
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.Ar patchfile .
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Attempting to apply a patch to the wrong file will usually produce
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garbage; consequently it is strongly recommended that users of
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.Nm
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verify that
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.Ar oldfile
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matches the source file from which
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.Ar patchfile
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was built, by comparing cryptographic hashes, for example.
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Users may also wish to verify after running
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.Nm
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that
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.Ar newfile
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matches the target file from which
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.Ar was built.
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