1 #include "lib.h"
2 #include <string.h>
3 #include "sys9.h"
4 #include "dir.h"
5 #define nil ((void*)0)
6
7 static char nullstring[] = "";
8
9 uint
_convM2D(uchar * buf,uint nbuf,Dir * d,char * strs)10 _convM2D(uchar *buf, uint nbuf, Dir *d, char *strs)
11 {
12 uchar *p, *ebuf;
13 char *sv[4];
14 int i, ns, nsv[4];
15
16 p = buf;
17 ebuf = buf + nbuf;
18
19 p += BIT16SZ; /* ignore size */
20 d->type = GBIT16(p);
21 p += BIT16SZ;
22 d->dev = GBIT32(p);
23 p += BIT32SZ;
24 d->qid.type = GBIT8(p);
25 p += BIT8SZ;
26 d->qid.vers = GBIT32(p);
27 p += BIT32SZ;
28 d->qid.path = GBIT64(p);
29 p += BIT64SZ;
30 d->mode = GBIT32(p);
31 p += BIT32SZ;
32 d->atime = GBIT32(p);
33 p += BIT32SZ;
34 d->mtime = GBIT32(p);
35 p += BIT32SZ;
36 d->length = GBIT64(p);
37 p += BIT64SZ;
38
39 d->name = nil;
40 d->uid = nil;
41 d->gid = nil;
42 d->muid = nil;
43
44 for(i = 0; i < 4; i++){
45 if(p + BIT16SZ > ebuf)
46 return 0;
47 ns = GBIT16(p);
48 p += BIT16SZ;
49 if(p + ns > ebuf)
50 return 0;
51 if(strs){
52 nsv[i] = ns;
53 sv[i] = strs;
54 memmove(strs, p, ns);
55 strs += ns;
56 *strs++ = '\0';
57 }
58 p += ns;
59 }
60
61 if(strs){
62 d->name = sv[0];
63 d->uid = sv[1];
64 d->gid = sv[2];
65 d->muid = sv[3];
66 }else{
67 d->name = nullstring;
68 d->uid = nullstring;
69 d->gid = nullstring;
70 d->muid = nullstring;
71 }
72
73 return p - buf;
74 }
75