#define lsns_ioctl(fildes, request, ...) __extension__ ({ \
int ret = ioctl(fildes, request, ##__VA_ARGS__); \
- if (ret == -1 && errno == ENOTTY) \
+ if (ret == -1 && (errno == ENOTTY || errno == ENOSYS)) \
warnx("Unsupported ioctl %s", #request); \
ret; })