Technical data

cdio(7I) Ioctl Requests SunOS 5.5
CDROM_LBA LBA format
CDROM_MSF MSF format
CDROMSUBCHNL This ioctl() command reads the Q sub-channel data of the current
block. The subchannel data includes track number, index number,
absolute CD-ROM address, track relativeCD-ROM address, control
data and audio status. All information is returned through a
pointer to struct cdrom_subchnl. The caller needs to supply the
address format for the returned address.
struct cdrom_subchnl {
unsigned char cdsc_format;
unsigned char cdsc_audiostatus;
unsigned char cdsc_adr: 4;
unsigned char cdsc_ctrl: 4;
unsigned char cdsc_trk;
unsigned char cdsc_ind;
union {
struct {
unsigned char minute;
unsigned char second;
unsigned char frame;
} msf;
int lba;
} cdsc_absaddr;
union {
struct {
unsigned char minute;
unsigned char second;
unsigned char frame;
} msf;
int lba;
} cdsc_reladdr;
};
7I-56 modified 26 Jan 1995