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- /*
- * 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, int32_t 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;
- }
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