Put a message before asking for password in FDE boot

[joao177]

I'm aiming to put a small advisory before the "Enter password" prompt in a FDE boot, and, if possible, change the prompt text itself. How can this be achieved?

[jggimi]

If you mean the prompt produced by the bootloader, such as:

>> OpenBSD/amd64 BOOT 3.53
Passphrase:

then you'll need to customize the source code and rebuild the release(8), as the prompt is in /usr/src/sys/lib/libsa/softraid.c, a function used by your architecture's softraid-compatible bootloader.

[joao177]

That's what I was looking for, thank you! Now, do I need to rebuild the entire source, or I can build only that specific fragment?

[jggimi]

It will be easier to build a full release(8), then reinstall boot blocks with installboot(8).