#include	<stdio.h>char	*malloc();int_flsbuf(c, iop)	int c;	register FILE *iop;{	register char *base;	register n, rn;	char c1;	extern char _sobuf[];	if (iop->_flag & _IORW) {		iop->_flag |= _IOWRT;		iop->_flag &= ~_IOEOF;	}tryagain:	if (iop->_flag & _IONBF) {		c1 = c;		rn = 1;		n = write(fileno(iop), &c1, rn);		iop->_cnt = 0;	} else {		if ((base = iop->_base) == NULL) {			if (iop == stdout) {				if (isatty(fileno(stdout))) {					iop->_flag |= _IONBF;					goto tryagain;				}				iop->_base = _sobuf;				iop->_ptr = _sobuf;				goto tryagain;			}			if ((iop->_base = base = malloc(BUFSIZ)) == NULL) {				iop->_flag |= _IONBF;				goto tryagain;			}			iop->_flag |= _IOMYBUF;			rn = n = 0;		} else if((rn = n = iop->_ptr - base) > 0) {			iop->_ptr = base;			n = write(fileno(iop), base, n);		}		iop->_cnt = BUFSIZ - 1;		*base++ = c;		iop->_ptr = base;	}	if (rn != n) {		iop->_flag |= _IOERR;		return(EOF);	}	return(c);}intfflush(iop)	register FILE *iop;{	register char *base;	register n;	if ((iop->_flag & (_IONBF|_IOWRT)) == _IOWRT	 && (base = iop->_base) != NULL && (n = iop->_ptr - base) > 0) {		iop->_ptr = base;		iop->_cnt = BUFSIZ;		if (write(fileno(iop), base, n) != n) {			iop->_flag |= _IOERR;			return(EOF);		}	}	return(0);}/* * Flush buffers on exit */_cleanup(){	register FILE *iop;	extern FILE *_lastbuf;	for(iop = _iob; iop < _lastbuf; iop++)		fclose(iop);}intfclose(iop)	register FILE *iop;{	register r;	r = EOF;	if (iop->_flag & (_IOREAD|_IOWRT|_IORW)	    && (iop->_flag & _IOSTRG) == 0) {		r = fflush(iop);		if (close(fileno(iop)) < 0)			r = EOF;		if (iop->_flag & _IOMYBUF)			free(iop->_base);		if (iop->_flag & (_IOMYBUF|_IONBF))			iop->_base = NULL;	}	iop->_flag &=		~(_IOREAD|_IOWRT|_IONBF|_IOMYBUF|_IOERR|_IOEOF|_IOSTRG|_IORW);	iop->_cnt = 0;	return(r);}