PARENT_SOCK_FILENO
if (imsgbuf_init(ibuf_main, PARENT_SOCK_FILENO) == -1)
if (imsgbuf_init(ibuf_dns, PARENT_SOCK_FILENO) == -1)
if (cfd != PARENT_SOCK_FILENO) {
if (dup2(cfd, PARENT_SOCK_FILENO) == -1)