func getMinimumTransferSize(file File) int64 { rv := C.fpathconf((C.int)(file.Fd()), C._PC_REC_MIN_XFER_SIZE) return int64(rv) }
func getRecommendedTransferAlignment(file File) int64 { rv := C.fpathconf((C.int)(file.Fd()), C._PC_REC_XFER_ALIGN) return int64(rv) }