getfdname
(void) strcpy(dname, getfdname(pdir, TYPE_D, level, d, 0));
getfdname(dname, TYPE_F, level+1, d, f));
(void) strcpy(fname, getfdname(pdir, TYPE_F, level, d, f));
static char *getfdname(char *pdir, char type, int level, int dir, int file);