Merge "Further cleanup of the logic in device_init."

    /* is 256K enough? udev uses 16MB! */

    device_fd = uevent_open_socket(256*1024, true);

    if(device_fd < 0)

    if (device_fd == -1) {

        return;

    }

    fcntl(device_fd, F_SETFL, O_NONBLOCK);

    struct stat info;

    if (stat(COLDBOOT_DONE, &info) < 0) {

    if (access(COLDBOOT_DONE, F_OK) == 0) {

        NOTICE("Skipping coldboot, already done!\n");

        return;

    }

    Timer t;

    coldboot("/sys/class");

    coldboot("/sys/block");

    coldboot("/sys/devices");

    close(open(COLDBOOT_DONE, O_WRONLY|O_CREAT|O_CLOEXEC, 0000));

    NOTICE("Coldboot took %.2fs.\n", t.duration());

    } else {

        NOTICE("Skipping coldboot, already done!\n");

    }

}

int get_device_fd()