52 		struct timeval tv;  in main()  local
56 		tv.tv_sec = 0;  in main()
57 		tv.tv_usec = 1;  in main()
59 		if (pipe(pipefd) == -1)  in main()
64 		rv = select(pipefd[0]+1, &rfds, NULL, NULL, &tv);  in main()
65 		if (rv == -1)  in main()
71 			errx(EXIT_FAILURE, "stdin fileno is still set");  in main()
75 		struct timeval tv;  in main()  local
78 		tv.tv_sec = 0;  in main()
79 		tv.tv_usec = 1;  in main()
83 		rv = select(100, &fds, &fds, &fds, &tv);  in main()
84 		if (rv == -1)  in main()
89 		rv = select(0, NULL, NULL, NULL, &tv);  in main()
90 		if (rv == -1)  in main()
101 		if (fd == -1)  in main()
124 			if ((fd = open("/dev/null", O_RDWR)) == -1)  in main()
128 		if (fd != -1 || errno != ENFILE)  in main()