bootmanager: add a detection of immutable 'firmware_version' values

PeterPawn / YourFritz

dynamic package management for AVM routers

GNU General Public License v2.0

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Closed PeterPawn closed 2 years ago

PeterPawn commented 2 years ago

extract EVA configuration area (first 1024 bytes) from 'urlader' partition and
dissect it to get an environment file (like proc/sys/urlader/environment), but with some marks for immutable values and
check the mark of firmware_version for a meaningful differentiation of models with and without the feature to change 'firmware_version' permanently via /proc/sys/urlader/environment -> firmware_version

PeterPawn commented 2 years ago

automatic close didn't work from https://github.com/PeterPawn/YourFritz/pull/47 - correct format would be:

closes #43 closes #44

(Yes, it's reality: Out of the door. Line on the left. One cross each. Next.)