print_tree
static void print_tree(int *, u_int, struct sysctlnode *, u_int, int, regex_t *,
print_tree(&name[0], 0, NULL, CTLTYPE_NODE, 1,
print_tree(name, namelen + 1, &node[ni],
print_tree(&name[0], namelen, node, type, 0, re, lastcompiled);
print_tree(&name[0], namelen, node, type, 0, re, lastcompiled);