CDIOCREADSUBCHANNEL
case CDIOCREADSUBCHANNEL:
error = fo_ioctl(fp, CDIOCREADSUBCHANNEL, (caddr_t)&bsdsc,
if (ioctl (fd, CDIOCREADSUBCHANNEL, (char *) &s) < 0)
rc = ioctl (fd, CDIOCREADSUBCHANNEL, (char *) &ss);