On Wed, Sep 28, 2022, at 1:47 PM, Ansgar wrote: > No, you would need to atomically replace the *entire* system, not just > individual directories.
??? Atomic replacement of each affected directory is, as far as I can see, both necessary and sufficient to prevent the system being rendered unbootable. > But please explain how this is specifc to usrmerge and not many other > packages. As I already said, this code needs to be extra robust because it is being run from a postinst script, at some unpredictable moment in the middle of an upgrade to bookworm (in most cases). zw
