sysctl_locate
error = sysctl_locate(l, &name[0], SCARG(uap, namelen), &pnode, NULL);
error = sysctl_locate(l, &sysctl_num, 1, &node, NULL);
error = sysctl_locate(NULL, &name[0], namelen - 1, &pnode, &ni);
error = sysctl_locate(NULL, &name[0], namelen - 1, &pnode, &ni);
error = sysctl_locate(NULL, &name[0], namelen - 1, &node, &ni);
error = sysctl_locate(NULL, &name[0], namelen, &rnode, &ni);
error = sysctl_locate(l, name, namelen, &rnode, &ni);
error = sysctl_locate(l, oname, elim, &enode, NULL);
int sysctl_locate(struct lwp *, const int *, u_int,