ref: 41e27b2d10c6a60c49931332e8677438736a1e36
dir: /os/boot/puma/dosfs.h/
typedef struct Dosboot Dosboot; typedef struct Dos Dos; typedef struct Dosdir Dosdir; typedef struct Dosfile Dosfile; typedef struct Dospart Dospart; struct Dospart { uchar flag; /* active flag */ uchar shead; /* starting head */ uchar scs[2]; /* starting cylinder/sector */ uchar type; /* partition type */ uchar ehead; /* ending head */ uchar ecs[2]; /* ending cylinder/sector */ uchar start[4]; /* starting sector */ uchar len[4]; /* length in sectors */ }; #define FAT12 0x01 #define FAT16 0x04 #define FATHUGE 0x06 #define DMDDO 0x54 struct Dosboot{ uchar magic[3]; uchar version[8]; uchar sectsize[2]; uchar clustsize; uchar nresrv[2]; uchar nfats; uchar rootsize[2]; uchar volsize[2]; uchar mediadesc; uchar fatsize[2]; uchar trksize[2]; uchar nheads[2]; uchar nhidden[4]; uchar bigvolsize[4]; uchar driveno; uchar reserved0; uchar bootsig; uchar volid[4]; uchar label[11]; uchar reserved1[8]; }; struct Dosfile{ Dos *dos; /* owning dos file system */ char name[8]; char ext[3]; uchar attr; long length; long pstart; /* physical start cluster address */ long pcurrent; /* physical current cluster address */ long lcurrent; /* logical current cluster address */ long offset; }; struct Dos{ int dev; /* device id */ long (*read)(int, void*, long); /* read routine */ long (*seek)(int, long); /* seek routine */ int start; /* start of file system */ int sectsize; /* in bytes */ int clustsize; /* in sectors */ int clustbytes; /* in bytes */ int nresrv; /* sectors */ int nfats; /* usually 2 */ int rootsize; /* number of entries */ int volsize; /* in sectors */ int mediadesc; int fatsize; /* in sectors */ int fatclusters; int fatbits; /* 12 or 16 */ long fataddr; /* sector number */ long rootaddr; long dataaddr; long freeptr; Dosfile root; }; struct Dosdir{ uchar name[8]; uchar ext[3]; uchar attr; uchar reserved[10]; uchar time[2]; uchar date[2]; uchar start[2]; uchar length[4]; }; #define DRONLY 0x01 #define DHIDDEN 0x02 #define DSYSTEM 0x04 #define DVLABEL 0x08 #define DDIR 0x10 #define DARCH 0x20 extern int chatty; extern int dosboot(Dos*, char*); extern int dosinit(Dos*, int, int); extern long dosread(Dosfile*, void*, long); extern int dosstat(Dos*, char*, Dosfile*); extern int doswalk(Dosfile*, char*); extern int plan9ini(Dos*, char*);