[aklug] tar overwriting

Can tar overwrite files, but make the new files (I'm presuming they are
deleted and recreated) have the same ownership/permissions as the old
(overwritten) files? I.e., rather than using the ownership/permissions
from the archive, or simply using the standard permissions for newly
created files. I went through the man/info pages a time or two, but I'm
still a bit unclear as to what precise switch voodoo would make this
happen. (Assuming it is even capable of doing that.)

Something I run into when doing upgrades on software packages in Web
directories: I set special permissions on certain files, but I lose a
lot of them when I overlay the old files with the new files from the
upgrade package.

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