47 lines
1.1 KiB
C
47 lines
1.1 KiB
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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#include <u.h>
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#include <libc.h>
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#include <9P2000.h>
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enum
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{
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DIRSIZE = STATFIXLEN + 16 * 4 /* enough for encoded stat buf + some reasonable strings */
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};
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Dir*
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jehanne_dirstat(const char *name)
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{
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Dir *d;
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uint8_t *buf;
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int n, nd, i;
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nd = DIRSIZE;
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for(i=0; i<2; i++){ /* should work by the second try */
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d = jehanne_malloc(sizeof(Dir) + BIT16SZ + nd);
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if(d == nil)
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return nil;
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buf = (uint8_t*)&d[1];
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n = jehanne_stat(name, buf, BIT16SZ+nd);
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if(n < BIT16SZ){
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jehanne_free(d);
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return nil;
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}
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nd = GBIT16((uint8_t*)buf); /* upper bound on size of Dir + strings */
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if(nd <= n){
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jehanne_convM2D(buf, n, d, (char*)&d[1]);
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return d;
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}
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/* else sizeof(Dir)+BIT16SZ+nd is plenty */
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jehanne_free(d);
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}
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return nil;
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}
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