44 lines
943 B
C
44 lines
943 B
C
/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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/*
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* pANS stdio -- sclose
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*/
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#include "iolib.h"
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char *sclose(FILE *f){
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switch(f->state){
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default: /* ERR CLOSED */
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if(f->buf && f->flags&BALLOC)
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free(f->buf);
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f->flags=0;
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return NULL;
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case OPEN:
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f->buf=malloc(1);
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f->buf[0]='\0';
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break;
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case RD:
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case END:
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f->flags=0;
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break;
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case RDWR:
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case WR:
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if(f->wp==f->rp){
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if(f->flags&BALLOC)
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f->buf=realloc(f->buf, f->bufl+1);
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if(f->buf==NULL) return NULL;
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}
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*f->wp='\0';
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f->flags=0;
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break;
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}
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f->state=CLOSED;
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f->flags=0;
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return f->buf;
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}
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