99 lines
1.5 KiB
C
99 lines
1.5 KiB
C
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#include <u.h>
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#include <libc.h>
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#include <fcall.h>
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int
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statcheck(uchar *buf, uint nbuf)
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{
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uchar *ebuf;
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int i, nstr;
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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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nstr = 4;
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for(i = 0; i < nstr; 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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uint
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convM2D(uchar *buf, uint nbuf, Dir *d, char *strs)
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{
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uchar *p, *ebuf;
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char *sv[5];
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int i, ns, nstr;
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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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nstr = 4;
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for(i = 0; i < nstr; 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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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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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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d->ext = nullstring;
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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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d->ext = nullstring;
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}
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return p - buf;
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}
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