ref: 2c9e3861a54e22498fb2e3226defe4393b20b202
dir: /sys/src/cmd/9660srv/iso9660.h/
#define VOLDESC 16 /* sector number */ /* * L means little-endian, M means big-endian, and LM means little-endian * then again big-endian. */ typedef uchar Byte2L[2]; typedef uchar Byte2M[2]; typedef uchar Byte4LM[4]; typedef uchar Byte4L[4]; typedef uchar Byte4M[4]; typedef uchar Byte8LM[8]; typedef union Drec Drec; typedef union Voldesc Voldesc; enum { Boot = 0, Primary = 1, Supplementary = 2, Partition = 3, Terminator = 255 }; union Voldesc { /* volume descriptor */ uchar byte[Sectorsize]; union { /* for CD001, the ECMA standard */ struct { uchar type; uchar stdid[5]; uchar version; uchar unused; uchar sysid[32]; uchar bootid[32]; uchar data[1977]; } boot; struct { uchar type; uchar stdid[5]; uchar version; uchar flags; uchar sysid[32]; uchar volid[32]; Byte8LM partloc; Byte8LM size; uchar escapes[32]; Byte4LM vsetsize; Byte4LM vseqno; Byte4LM blksize; Byte8LM ptabsize; Byte4L lptable; Byte4L optlptable; Byte4M mptable; Byte4M optmptable; uchar rootdir[34]; uchar volsetid[128]; uchar pubid[128]; uchar prepid[128]; uchar appid[128]; uchar copyright[37]; uchar abstract[37]; uchar bibliography[37]; uchar cdate[17]; uchar mdate[17]; uchar expdate[17]; uchar effdate[17]; uchar fsversion; uchar unused3[1]; uchar appuse[512]; uchar unused4[653]; } desc; } z; union { /* for CDROM, the `High Sierra' standard */ struct { Byte8LM number; uchar type; uchar stdid[5]; uchar version; uchar flags; uchar sysid[32]; uchar volid[32]; Byte8LM partloc; Byte8LM size; uchar escapes[32]; Byte4LM vsetsize; Byte4LM vseqno; Byte4LM blksize; uchar quux[40]; uchar rootdir[34]; uchar volsetid[128]; uchar pubid[128]; uchar prepid[128]; uchar appid[128]; uchar copyright[32]; uchar abstract[32]; uchar cdate[16]; uchar mdate[16]; uchar expdate[16]; uchar effdate[16]; uchar fsversion; } desc; } r; }; union Drec { struct { uchar reclen; uchar attrlen; Byte8LM addr; Byte8LM size; uchar date[6]; uchar tzone; /* flags in high sierra */ uchar flags; /* ? in high sierra */ uchar unitsize; /* ? in high sierra */ uchar gapsize; /* ? in high sierra */ Byte4LM vseqno; /* ? in high sierra */ uchar namelen; uchar name[1]; }; struct { uchar r_pad[24]; uchar r_flags; }; }; struct Isofile { short fmt; /* 'z' if iso, 'r' if high sierra */ short blksize; vlong offset; /* true offset when reading directory */ long odelta; /* true size of directory just read */ vlong doffset; /* plan9 offset when reading directory */ Drec d; };