_PATH_DEV_PING
if ((devfd = open(_PATH_DEV_PING, O_RDWR)) == -1)
err(EXIT_FAILURE, "Cannot open %s", _PATH_DEV_PING);
err(EXIT_FAILURE, "Cannot close %s", _PATH_DEV_PING);
if ((devfd = open(_PATH_DEV_PING, O_RDWR)) == -1)
err(EXIT_FAILURE, "Cannot open %s", _PATH_DEV_PING);
err(EXIT_FAILURE, "Cannot close %s", _PATH_DEV_PING);