That implies that deleting files could potentially increase the space
requirement on the disk (not good). Creating a directory is an "expensive"
operation (uses non-negligible space and cpu/wallclock time).
I don't think those are desirable properties of an unlink() operator.
-- Sincerely, srb@cuci.nl Stephen R. van den Berg (AKA BuGless).Real programmers don't just die, they produce core dumps.