Colin Percival wrote:
Depending on the UpdateIfUnmodified option in freebsd-update.conf, it will
either update files to "clean" new versions or print a warning message and
not touch them.
There's also an IgnorePaths directive which you can use to tell FreeBSD
Update not to touch some files (even if they haven't been modified locally).
FreeBSD Update will never produce mangled files as a result of applying a
bsdiff patch to the wrong file -- it checks file hashes before and after
applying patches and gracefully falls back to downloading complete files
if it can't generate a file via patching.
If freebsd-update allowed an 'upgrade' to the version already installed,
one could (mis)use it as a tool to repair a 'broken' system... (probably
a naive idea.)
Jan Henrik
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