savefd
int savefd = setb(2);
(void) setb(savefd);
fdmap[topfd++].dup_fd = savefd(ioufd);
int savefd;
savefd = setb(-1);
(void)setb(savefd);
int savefd = cur_term->_check_fd;
return (savefd);
int savefd = cur_term->_check_fd;
if (savefd >= 0)
(void) close(savefd);