On Fri, Apr 15, 2011 at 11:24:19AM -0600, Eric Blake wrote: > Would it be worth borrowing from Solaris' semantics and adding SEEK_HOLE > and SEEK_DATA to lseek(2), as a higher level (less-detailed, but easier > to define and easier to use) interface for discovering the regions of a > file that only contain NUL bytes?
Yes, I've already suggested that both in this thread and on IRC. For efficient copies it's the only usable interface.
