Gleb Smirnoff 3e8da9bb1a Return back checking file for sparseness. Use lseek(SEEK_HOLE) if supported by the system, otherwise fallback to block check. This allows to workaround bugs with SMB client and not introduce new bugs for filesystems with compression and deduplication. ...

This has theoretical bug if our collection spans different
filesystems and some filesystems support holes, and some not.
If this ever encountered we should use pathconf(2) and cache
its result for directories.

2018-01-16 17:05:44 -08:00

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