Re: Need Help: Replace Bytes In Binary File

On Sun, 04 May 2025 19:23:22 +0000, Farley Flud wrote:

On Sun, 4 May 2025 11:57:43 -0400, Chris Ahlstrom wrote:
 

 
This link has some ideas:
 
    https://stackoverflow.com/questions/4783657/write-byte-at-address-hexedit-modify-binary-from-the-command-line
 

 
That does work on my files.
 
printf '\x49\x4e\x41\x52\x59' | dd of=$1 bs=1 seek=7 count=5 conv=notrunc
 
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.
>

For the record, I just discovered another program that is designed
to search/replace on binary files in the manner of sed:

https://sourceforge.net/projects/bbe-/

I am very surprised that there are not more such utilities.

Bbe seems to have a bit of a learning curve.  For now, I'll stick
to manual editing with Hexditor.


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