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patch(1) on FreeBSD does not support null bytes. With GNU diff/patch I could handle multiple files containing null bytes with one patch, but xxd (which handles null bytes) does not seem to support this. How can I generate something similar to unified diff's with the native FreeBSD toolchain?

  • Patch is for text files, why do you like to use it for binary files? – schily Nov 23 '15 at 14:34
  • Does it have to be something “inert” on which the patcher will run a simple command like patch, which doesn't risk running arbitrary code, or can you use an arbitrary script as the patch? – Gilles 'SO- stop being evil' Nov 23 '15 at 23:34
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The "native FreeBSD toolchain", i.e., the base system is rather limited. You could use the ports for GNU diff/patch, or alternatively xdelta. bsdiff also is a possibility.

However, unified diffs (as the comments suggest) are specifically for text files because they are a specific format in terms of lines.

Xdelta provides the ability to generate deltas between a pair of files and later apply those deltas. It operates similar to the diff and patch commands, but works on binary files and does not produce a human readable output.

Ports:

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