kernel_sysctlbyname
error = kernel_sysctlbyname("hw.pci.default_vgapci_unit", &default_vgapci_unit, &len, NULL, 0, NULL);
if (!kernel_sysctlbyname("vm.vmtotal", &total, &vmt_size, NULL, 0, NULL)) {
if (!kernel_sysctlbyname("vm.vmstats", &vms, &vms_size, NULL, 0, NULL)) {
if (!kernel_sysctlbyname("vm.vmmeter", &vmm, &vmm_size, NULL, 0, NULL)) {
int kernel_sysctlbyname(char *name,