106 lines
1.8 KiB
C
106 lines
1.8 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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int
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statcheck(uint8_t *buf, uint32_t nbuf)
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{
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uint8_t *ebuf;
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int i;
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ebuf = buf + nbuf;
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if(nbuf < STATFIXLEN || nbuf != BIT16SZ + GBIT16(buf))
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return -1;
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buf += STATFIXLEN - 4 * BIT16SZ;
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for(i = 0; i < 4; i++){
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if(buf + BIT16SZ > ebuf)
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return -1;
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buf += BIT16SZ + GBIT16(buf);
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}
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if(buf != ebuf)
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return -1;
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return 0;
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}
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static char nullstring[] = "";
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uint32_t
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jehanne_convM2D(uint8_t *buf, uint32_t nbuf, Dir *d, char *strs)
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{
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uint8_t *p, *ebuf;
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char *sv[4];
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int i, ns;
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if(nbuf < STATFIXLEN)
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return 0;
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p = buf;
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ebuf = buf + nbuf;
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p += BIT16SZ; /* ignore size */
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d->type = GBIT16(p);
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p += BIT16SZ;
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d->dev = GBIT32(p);
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p += BIT32SZ;
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d->qid.type = GBIT8(p);
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p += BIT8SZ;
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d->qid.vers = GBIT32(p);
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p += BIT32SZ;
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d->qid.path = GBIT64(p);
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p += BIT64SZ;
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d->mode = GBIT32(p);
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p += BIT32SZ;
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d->atime = GBIT32(p);
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p += BIT32SZ;
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d->mtime = GBIT32(p);
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p += BIT32SZ;
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d->length = GBIT64(p);
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p += BIT64SZ;
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for(i = 0; i < 4; i++){
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if(p + BIT16SZ > ebuf)
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return 0;
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ns = GBIT16(p);
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if(ns < 0)
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return 0;
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p += BIT16SZ;
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if(p + ns > ebuf)
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return 0;
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if(strs){
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sv[i] = strs;
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jehanne_memmove(strs, p, ns);
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strs += ns;
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*strs++ = '\0';
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}
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p += ns;
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}
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if(strs){
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d->name = sv[0];
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d->uid = sv[1];
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d->gid = sv[2];
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d->muid = sv[3];
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}else{
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d->name = nullstring;
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d->uid = nullstring;
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d->gid = nullstring;
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d->muid = nullstring;
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}
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return p - buf;
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}
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