__off_t pos;
long int pos;
seekdir (dirp, pos)     DIR *dirp;     __off_t pos;{  __libc_lock_lock (dirp->__lock);  /* Change our entry index pointer to POS and discard any data already     read.  The next `readdir' call will notice the empty block and read     anew from the location in DIRP->__entry_ptr and reset the other state     variables.  */  dirp->__entry_ptr = pos;  dirp->__size = 0;  __libc_lock_unlock (dirp->__lock);}