Function finish_child

ccan/ccan/ptr_valid/ptr_valid.c:160–166

}

static void finish_child(struct ptr_valid_batch *batch)
{
	close(batch->to_child);
	close(batch->from_child);
	while (waitpid(batch->child_pid, NULL, 0) < 0 && errno == EINTR);
	batch->child_pid = 0;
}

static bool child_alive(struct ptr_valid_batch *batch)
{