lotus/fsutil/filesize_unix.go

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2020-07-08 15:09:35 +00:00
package fsutil
import (
"syscall"
"golang.org/x/xerrors"
)
type SizeInfo struct {
OnDisk int64
}
// FileSize returns bytes used by a file on disk
func FileSize(path string) (SizeInfo, error) {
var stat syscall.Stat_t
if err := syscall.Stat(path, &stat); err != nil {
return SizeInfo{}, xerrors.Errorf("stat: %w", err)
}
// NOTE: stat.Blocks is in 512B blocks, NOT in stat.Blksize
// See https://www.gnu.org/software/libc/manual/html_node/Attribute-Meanings.html
return SizeInfo{
stat.Blocks * 512,
}, nil
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}