sock_accept
CHECKr(pthread_create(&accept_thread, NULL, sock_accept, NULL));
CHECKr(pthread_create(&accept_thread, NULL, sock_accept, NULL));
CHECKr(pthread_create(&accept_thread, NULL, sock_accept, NULL));
CHECKr(pthread_create(&accept_thread, NULL, sock_accept, argv[1]));
CHECKr(pthread_create(&thread, &attr, sock_accept,
CHECKr(pthread_create(&thread, NULL, sock_accept,
CHECKr(pthread_create(&accept_thread, NULL, sock_accept, NULL));