MNTIOC_NMNTS
if (ioctl(fd, MNTIOC_NMNTS, &nmnt) != 0 || nmnt <= 0) {
{ (uint_t)MNTIOC_NMNTS, "MNTIOC_NMNTS", NULL }, /* 1 */
case MNTIOC_NMNTS: /* get no. of mounted resources */