lotus/extern/sector-storage/fsutil/filesize_unix.go
2020-08-17 17:26:07 +01:00

30 lines
654 B
Go

package fsutil
import (
"os"
"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 {
if err == syscall.ENOENT {
return SizeInfo{}, os.ErrNotExist
}
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{
int64(stat.Blocks) * 512, // nolint NOTE: int64 cast is needed on osx
}, nil
}