bspatch man page
bspatch — apply a patch built with bsdiff(1)
|bspatch||⟨oldfile⟩ ⟨newfile⟩ ⟨patchfile⟩|
bspatch generates ⟨newfile⟩ from ⟨oldfile⟩ and ⟨patchfile⟩ where ⟨patchfile⟩ is a binary patch built by bsdiff(1).
bspatch 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.
Colin Percival ⟨email@example.com⟩