Re: Need Help: Replace Bytes In Binary File

On Sun, 04 May 2025 21:14:57 +0000, Farley Flud <ff@linux.rocks> wrote in
<pan$883eb$94630766$6fffee5$582c1c40@linux.rocks>:
 

On Sun, 04 May 2025 19:23:22 +0000, Farley Flud wrote:
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On Sun, 4 May 2025 11:57:43 -0400, Chris Ahlstrom wrote:
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This link has some ideas:
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     https://stackoverflow.com/questions/4783657/write-byte-at-address-

hexedit-modify-binary-from-the-command-line

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That does work on my files.
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printf '\x49\x4e\x41\x52\x59' | dd of=$1 bs=1 seek=7 count=5
conv=notrunc
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But the offset has to known beforehand and the replacement bytes have
to be entered manually.  It's just as slow as using search and replace
with a hex editor.
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For the record, I just discovered another program that is designed to
search/replace on binary files in the manner of sed:
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https://sourceforge.net/projects/bbe-/
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I am very surprised that there are not more such utilities.
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Bbe seems to have a bit of a learning curve.  For now, I'll stick to
manual editing with Hexditor.

 Thank you for suggesting bbe.
 Incidentally:
 $ apt-cache show bbe
[...]
Section: universe/editors
Origin: Ubuntu
[...]
  _ _ _ _ _ _ _
 There are examples in the info documentation.  For
viewing it, I recommend pinfo(1), which is sort of like
lynx(1) for info files.