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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
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
$FreeBSD$
.Dd May 18, 2003 .Dt BSDIFF 1 .Os .Sh NAME .Nm bsdiff .Nd "generate a patch between two binary files" .Sh SYNOPSIS .Nm .Ar oldfile newfile patchfile .Sh DESCRIPTION The .Nm utility compares .Ar oldfile to .Ar newfile and writes to .Ar patchfile a binary patch suitable for use by .Xr bspatch 1 . When .Ar oldfile and .Ar newfile are two versions of an executable program, the patches produced are on average a factor of five smaller than those produced by any other binary patch tool known to the author.
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
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
$FreeBSD$
.Dd May 18, 2003 .Dt BSDIFF 1 .Os .Sh NAME .Nm bsdiff .Nd "generate a patch between two binary files" .Sh SYNOPSIS .Nm .Ar oldfile newfile patchfile .Sh DESCRIPTION The .Nm utility compares .Ar oldfile to .Ar newfile and writes to .Ar patchfile a binary patch suitable for use by .Xr bspatch 1 . When .Ar oldfile and .Ar newfile are two versions of an executable program, the patches produced are on average a factor of five smaller than those produced by any other binary patch tool known to the author.
p The .Nm utility uses memory equal to 17 times the size of .Ar oldfile , and requires an absolute minimum working set size of 8 times the size of .Ar oldfile . .Sh SEE ALSO .Xr bspatch 1 .Sh AUTHORS .An Colin Percival Aq cperciva@FreeBSD.org .Sh BUGS The .Nm utility does not store the hashes of .Ar oldfile or .Ar newfile in .Ar patchfile . As a result, it is possible to apply a patch to the wrong file; this will usually produce garbage. It is recommended that users of .Nm store the hashes of .Ar oldfile and .Ar newfile and compare against them before and after applying .Ar patchfile .