kernel_sysctl
error = kernel_sysctl(mib, namelen + 2, mibname, &mibnamelen,
error = kernel_sysctl(oid, 2, oid, &oidlen, name, strlen(name), &plen);
error = kernel_sysctl(oid, plen / sizeof(int), old, oldlenp,
int kernel_sysctl(int *name, u_int namelen, void *old,