/*  * 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. */ /* * pANS stdio -- fseek */#include "iolib.h"int fseek(FILE *f, long offs, int type){	switch(f->state){	case ERR:	case CLOSED:		return -1;	case WR:		fflush(f);		break;	case RD:		if(type==1 && f->buf!=f->unbuf)			offs-=f->wp-f->rp;		break;	}	if(f->flags&STRING || seek(f->fd, offs, type)==-1) return -1;	if(f->state==RD) f->rp=f->wp=f->buf;	if(f->state!=OPEN)		f->state=RDWR;	return 0;}