ref: 361b65e4df0b4a3562a6e57b0f7b8009c59c3f2b
dir: /sys/src/cmd/9660srv/fns.h/
void chat(char*, ...); void* ealloc(long); void error(char*); Iobuf* getbuf(Xdata*, ulong, ulong); Xdata* getxdata(char*); void iobuf_init(void); void nexterror(void); void panic(int, char*, ...); void purgebuf(Xdata*); void putbuf(Iobuf*); void refxfs(Xfs*, int); void showdir(int, Dir*); Xfile* xfile(int, int); void setnames(Dir*, char*); #define waserror() (++nerr_lab, setjmp(err_lab[nerr_lab-1])) #define poperror() (--nerr_lab)