_PATH_DEV_LUA
if ((devfd = open(_PATH_DEV_LUA, O_RDWR)) == -1)
err(EXIT_FAILURE, "%s", _PATH_DEV_LUA);
RL(fd = open(_PATH_DEV_LUA, O_RDONLY));
RL(fd = open(_PATH_DEV_LUA, O_WRONLY));
RL(stat(_PATH_DEV_LUA, &st));
if (open(_PATH_DEV_LUA, O_WRONLY) != -1) {