isrewind
extern int isrewind(int);
extern int isrewind();
if (isrewind(to)) {
if (tapeout && isrewind(to)) {
if (tapeout && !isrewind(to) && offline) {
if (tapeout && (isrewind(to) || offline)) {
__os_seek(fd, pgsize, pageno, relative, isrewind, whence)
int isrewind, whence;
pgsize, pageno, relative, isrewind, whence);
if (isrewind)