freebsd man page for bspatch

BSPATCH(1)						    BSD General Commands Manual 						BSPATCH(1)

NAME
     bspatch -- apply a patch built with bsdiff(1)

SYNOPSIS
     bspatch oldfile newfile patchfile

DESCRIPTION
     The bspatch utility generates newfile from oldfile and patchfile where patchfile is a binary patch built by bsdiff(1).

     The bspatch utility uses memory equal to the size of oldfile plus the size of newfile, but can tolerate a very small working set without a
     dramatic loss of performance.

SEE ALSO
     bsdiff(1)

AUTHORS
     Colin Percival <cperciva@FreeBSD.org>

BUGS
     The bspatch utility does not verify that oldfile is the correct source file for patchfile.  Attempting to apply a patch to the wrong file
     will usually produce garbage; consequently it is strongly recommended that users of bspatch verify that oldfile matches the source file from
     which patchfile was built, by comparing cryptographic hashes, for example.  Users may also wish to verify after running bspatch that newfile
     matches the target file from which was built.

BSD
								   May 18, 2003 							       BSD