UDEV_DEVICE_PATH
if ((fd = open(UDEV_DEVICE_PATH, O_RDWR)) < 0) {
UDEV_DEVICE_PATH);
#ifndef UDEV_DEVICE_PATH
if ((udevfd = open(UDEV_DEVICE_PATH, O_RDWR | O_NONBLOCK)) == -1)
err(1, "%s", UDEV_DEVICE_PATH);