ba10db9984
constructing and applying binary patches; in particular, they perform well (in the sense of constructing small patches) for executable code. Both portsnap (coming to the base system Real Soon Now) and FreeBSD Update (coming to the base system a bit later) use bspatch. This is the same code as the bsdiff-4.2 which has been in the ports tree (misc/bsdiff) for the past year, with the following exceptions: 1. The license is now the traditional 2-clause BSD; 2. Instead of forking and execing bzip2, the code now uses libbz2; and 3. Some minor changes have been made to fit this code into the base system (adding $FreeBSD$ tags, putting bsdiff and bspatch into separate directories, etc.) This code is rather ugly and has lots of style bugs (mostly because I wrote it before I had ever heard of style(9)). Some day I'll come back and clean it up. Discussed on: freebsd-arch MFC before: 5.5-RELEASE Tested by: Several million users (earlier version).
60 lines
1.9 KiB
Groff
60 lines
1.9 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 FreeBSD
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.Sh NAME
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.Nm bspatch
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.Nd apply a patch built with bsdiff(1)
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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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generates
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.Ao Ar newfile Ac
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from
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.Ao Ar oldfile Ac
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and
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.Ao Ar patchfile Ac
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where
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.Ao Ar patchfile Ac
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is a binary patch built by bsdiff(1).
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.Pp
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.Nm
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uses memory equal to the size of
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.Ao Ar oldfile Ac
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plus the size of
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.Ao Ar newfile Ac ,
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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 cperciva@freebsd.org
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