/*  * This file is part of the UCB release of Plan 9. It is subject to the license * terms in the LICENSE file found in the top-level directory of this * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No * part of the UCB release of Plan 9, including this file, may be copied, * modified, propagated, or distributed except according to the terms contained * in the LICENSE file. */ #include <u.h>#include <libc.h> staticlongioreadv(int fd, IOchunk *io, int nio, vlong offset){	int i;	long m, n, tot;	char *buf, *p; 	tot = 0;	for(i=0; i<nio; i++)		tot += io[i].len;	buf = malloc(tot);	if(buf == nil)		return -1; 	tot = pread(fd, buf, tot, offset); 	p = buf;	n = tot;	for(i=0; i<nio; i++){		if(n <= 0)			break;		m = io->len;		if(m > n)			m = n;		memmove(io->addr, p, m);		n -= m;		p += m;		io++;	} 	free(buf);	return tot;} longreadv(int fd, IOchunk *io, int nio){	return ioreadv(fd, io, nio, -1LL);} longpreadv(int fd, IOchunk *io, int nio, vlong off){	return ioreadv(fd, io, nio, off);}