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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 -- sclose
- */
- #include "iolib.h"
- char *sclose(FILE *f){
- switch(f->state){
- default: /* ERR CLOSED */
- if(f->buf && f->flags&BALLOC)
- free(f->buf);
- f->flags=0;
- return NULL;
- case OPEN:
- f->buf=malloc(1);
- f->buf[0]='\0';
- break;
- case RD:
- case END:
- f->flags=0;
- break;
- case RDWR:
- case WR:
- if(f->wp==f->rp){
- if(f->flags&BALLOC)
- f->buf=realloc(f->buf, f->bufl+1);
- if(f->buf==NULL) return NULL;
- }
- *f->wp='\0';
- f->flags=0;
- break;
- }
- f->state=CLOSED;
- f->flags=0;
- return f->buf;
- }
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