[OT] file with holes

[Άγγελος Οικονομόπουλος]

Pws 8a mporousa na antigrapsw ena file with holes apo ena (unix) filesystem 
se ena allo, kratwntas ta holes? to dump e3aireitai :) Apo oso to exw 
psa3ei (oxi kai toso polu) kati tetoio einai adunato me ta uparxonta 
syscalls. Can somebody prove me wrong?
-- 
Make sure input cannot violate the limits of the program.
            - The Elements of Programming Style (Kernighan & Plaugher)