kvm_getswapinfo
int kvm_getswapinfo(kvm_t *, struct kvm_swap *, int, int);
if ((kvnsw = kvm_getswapinfo(kd, kvmsw, NSWAP, 0)) < 0) {
if ((kvnsw = kvm_getswapinfo(kd, kvmsw, NSWAP, 0)) < 0) {
n = kvm_getswapinfo(kd, swapary, 1, 0);
nswapdev = kvm_getswapinfo(hr_kd, swap_devs, swap_devs_len, 0);
n = kvm_getswapinfo(kd, kswap, sizeof kswap / sizeof kswap[0],