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gofilesystemssparse-file

Get the actual file size vs apparent size in GO

"fs.sys.Size" (fs being fileStat in the os package) returns the apparent size of a file. This isn't ideal when dealing with sparse files.

Is there a way to get the actual file size in GO? Or all applications are bound to get the converted metadata that represent empty blocks as real ones?

Solution

  • Looks like the Stat_t structure filled using stat/fstat calls from the Syscall package is all you need. Just multiply Blocks by 512 to get the disk space consumed.