DS_PARSE_TUPLE
case DS_PARSE_TUPLE:
(ioctl(fd, DS_PARSE_TUPLE, arg) == 0))
if (ioctl(pfd, DS_PARSE_TUPLE, &arg) == 0)
ioctl(fd, DS_PARSE_TUPLE, &arg);
ioctl(fd, DS_PARSE_TUPLE, &arg);