On Tue, 2006-Aug-01 12:51:32 -0500, Eric Anderson wrote: >string of zeros larger than the block size, or it needs to 'do the right >thing' and determine if it's sparse or not.
You can do this by comparing stat.st_size with stat.st_blocks - a sparse file will have fewer blocks than its size requires. What you can't do is accurately determine where the holes are. Note that st_blksize is not nessarily the allocation blocksize and therefore is unrelated to the size of holes in the filesystem. Also, on FreeBSD, the designation of "optimal" is a misnomer and I/O operations should be much larger than this for optimal efficiency. -- Peter Jeremy
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