Re: Need Help: Replace Bytes In Binary File

On 4 May 2025 21:39:49 GMT, vallor <vallor@cultnix.org> wrote in
<m7q555FhujlU1@mid.individual.net>:

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:
 

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.

 
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

Ah, nevermind pinfo(1) -- it will fail an assertion:

pinfo: initializelinks.c:159: finddot: Assertion `closest>=str'
failed.
Aborted (core dumped)

 ...when you browse to Invocating bbe > Commands

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