1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
#include <u.h>
#include <libc.h>
#include <fcall.h>
int
statchecku(uchar *buf, uint nbuf, int dotu)
{
uchar *ebuf;
int i, nstr;
ebuf = buf + nbuf;
if(nbuf < STATFIXLEN || nbuf != BIT16SZ + GBIT16(buf))
return -1;
buf += STATFIXLEN - 4 * BIT16SZ;
nstr = 4;
if(dotu)
nstr = 5;
for(i = 0; i < nstr; i++){
if(buf + BIT16SZ > ebuf)
return -1;
buf += BIT16SZ + GBIT16(buf);
}
if(dotu)
buf += 3*BIT32SZ;
if(buf != ebuf)
return -1;
return 0;
}
int
statcheck(uchar *buf, uint nbuf)
{
return statchecku(buf, nbuf, 0);
}
static char nullstring[] = "";
uint
convM2Du(uchar *buf, uint nbuf, Dir *d, char *strs, int dotu)
{
uchar *p, *ebuf;
char *sv[5];
int i, ns, nstr;
if(nbuf < STATFIXLEN)
return 0;
p = buf;
ebuf = buf + nbuf;
p += BIT16SZ; /* ignore size */
d->type = GBIT16(p);
p += BIT16SZ;
d->dev = GBIT32(p);
p += BIT32SZ;
d->qid.type = GBIT8(p);
p += BIT8SZ;
d->qid.vers = GBIT32(p);
p += BIT32SZ;
d->qid.path = GBIT64(p);
p += BIT64SZ;
d->mode = GBIT32(p);
p += BIT32SZ;
d->atime = GBIT32(p);
p += BIT32SZ;
d->mtime = GBIT32(p);
p += BIT32SZ;
d->length = GBIT64(p);
p += BIT64SZ;
nstr = 4;
if(dotu)
nstr = 5;
for(i = 0; i < nstr; i++){
if(p + BIT16SZ > ebuf)
return 0;
ns = GBIT16(p);
p += BIT16SZ;
if(p + ns > ebuf)
return 0;
if(strs){
sv[i] = strs;
memmove(strs, p, ns);
strs += ns;
*strs++ = '\0';
}
p += ns;
}
if(dotu){
if(p + BIT32SZ*3 > ebuf)
return 0;
d->uidnum = GBIT32(p);
p += BIT32SZ;
d->gidnum = GBIT32(p);
p += BIT32SZ;
d->muidnum = GBIT32(p);
p += BIT32SZ;
}
if(strs){
d->name = sv[0];
d->uid = sv[1];
d->gid = sv[2];
d->muid = sv[3];
d->ext = nullstring;
if(dotu)
d->ext = sv[4];
}else{
d->name = nullstring;
d->uid = nullstring;
d->gid = nullstring;
d->muid = nullstring;
d->ext = nullstring;
}
return p - buf;
}
uint
convM2D(uchar *buf, uint nbuf, Dir *d, char *strs)
{
return convM2Du(buf, nbuf, d, strs, 0);
}
|
