Apolgies if this answer exists - I don't even know what to search for and my searches aren't revealing to me. I have an image - it is name.itb. I want to extract the root squashfs and modify a configuration file and the put the root squashfs back (replace it) in the itb. I am using dd to do this …

[image] clutch2sft: just like my file I want to change after image build it just can't be done. Would that be an accurate statement? Yes, the compiled image can't be changed. A major reason is that the file system is usually compressed, so you should first expand it, then modify it and then …

There's no to extract or edit files contained in a binary image such as yours and safely reassemble it for use.

Bummer - so what could be a strategy to have a unique thing in a config file for each router the firmware is deployed to? Certainly we wouldn't want to build it each time for each router?

[image] clutch2sft: so what could be a strategy to have a unique thing in a config file for each router the firmware is deployed to? You could use the Firmware Selector to add your unique configs. See: https://firmware-selector.openwrt.org More information here: [image] Th…

Awesome thanks for the detailed replies. I think those options are interesting. Is it true that both of those options rely on a static file inside the itb file itself? So just like my file I want to change after image build it just can't be done. Would that be an accurate statement? I ask becau…

Well for what it is worth - the firmware selector is very cool and I am thankful to those who built it. I have a few more questions but they seem distantly related so I'll close this thread as complete with the latest answer. Appriciate your inputs!

If you have several similar routers that you want to burn a bit different tailored settings into firmware, you might look into the imagebuilder and "custom files" (or even the full toolchain and custom files). It would be pretty easy to have an otherwise compiled components ready, and then just hav…

Edit files in .itb

For Developers

lleachii November 2, 2023, 4:13pm 4

You could use the Firmware Selector to add your unique configs.

See: https://firmware-selector.openwrt.org

More information here:

and here:

Actually, that was the original option before the Firmware Selector. I think there's a [local] image builder that works as well - but it requires download and setup on a local machine.