ref: 12fa017f3fc2687d3afb166fd30d9b134abb1da5
dir: /sys/src/cmd/tapefs/tapefs.h/
#define g2byte(x) (((x)[1]<<8) + (x)[0]) /* little-endian */ #define g3byte(x) (((x)[2]<<16) + ((x)[1]<<8) + (x)[0]) #define g4byte(x) (((x)[3]<<24) + ((x)[2]<<16) + ((x)[1]<<8) + (x)[0]) /* big endian */ #define b4byte(x) (((x)[0]<<24) + ((x)[1]<<16) + ((x)[2]<<8) + (x)[3]) #define b8byte(x) (((vlong)b4byte(x)<<32) | (u32int)b4byte((x)+4)) enum { OPERM = 0x3, /* mask of all permission types in open mode */ Nram = 512, Maxbuf = 8192, /* max buffer size */ }; typedef struct Fid Fid; typedef struct Ram Ram; struct Fid { short busy; short open; short rclose; int fid; Fid *next; char *user; Ram *ram; }; struct Ram { char busy; char open; char replete; Ram *parent; /* parent directory */ Ram *child; /* first member of directory */ Ram *next; /* next member of file's directory */ Qid qid; long perm; char *name; ulong atime; ulong mtime; char *user; char *group; vlong addr; void *data; vlong ndata; }; enum { Pexec = 1, Pwrite = 2, Pread = 4, Pother = 1, Pgroup = 8, Powner = 64, }; typedef struct idmap { char *name; int id; } Idmap; typedef struct fileinf { char *name; vlong addr; void *data; vlong size; int mode; int uid; int gid; long mdate; } Fileinf; extern ulong path; /* incremented for each new file */ extern Ram *ram; extern char *user; extern Idmap *uidmap; extern Idmap *gidmap; extern int replete; extern int blocksize; void error(char*); void *erealloc(void*, ulong); void *emalloc(ulong); char *estrdup(char*); void populate(char *); void dotrunc(Ram*); void docreate(Ram*); char *doread(Ram*, vlong, long); void dowrite(Ram*, char*, long, long); int dopermw(Ram*); Idmap *getpass(char*); char *mapid(Idmap*,int); Ram *poppath(Fileinf fi, int new); Ram *popfile(Ram *dir, Fileinf fi); void popdir(Ram*); Ram *lookup(Ram*, char*);