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
|
#include <u.h>
#include <libc.h>
#include <venti.h>
#include <diskfs.h>
#include <thread.h>
void
usage(void)
{
fprint(2, "usage: vcat [-z] score >diskfile\n");
threadexitsall("usage");
}
void
threadmain(int argc, char **argv)
{
extern int nfilereads;
char *pref;
int zerotoo;
uchar score[VtScoreSize];
u8int *zero;
u32int i;
u32int n;
Block *b;
Disk *disk;
Fsys *fsys;
VtCache *c;
VtConn *z;
zerotoo = 0;
ARGBEGIN{
case 'z':
zerotoo = 1;
break;
default:
usage();
}ARGEND
if(argc != 1)
usage();
fmtinstall('V', vtscorefmt);
if(vtparsescore(argv[0], &pref, score) < 0)
sysfatal("bad score '%s'", argv[0]);
if((z = vtdial(nil)) == nil)
sysfatal("vtdial: %r");
if(vtconnect(z) < 0)
sysfatal("vtconnect: %r");
if((c = vtcachealloc(z, 16384*32)) == nil)
sysfatal("vtcache: %r");
if((disk = diskopenventi(c, score)) == nil)
sysfatal("diskopenventi: %r");
if((fsys = fsysopen(disk)) == nil)
sysfatal("fsysopen: %r");
zero = emalloc(fsys->blocksize);
fprint(2, "%d blocks total\n", fsys->nblock);
n = 0;
for(i=0; i<fsys->nblock; i++){
if((b = fsysreadblock(fsys, i)) != nil){
if(pwrite(1, b->data, fsys->blocksize,
(u64int)fsys->blocksize*i) != fsys->blocksize)
fprint(2, "error writing block %lud: %r\n", i);
n++;
blockput(b);
}else if(zerotoo || i==fsys->nblock-1)
if(pwrite(1, zero, fsys->blocksize,
(u64int)fsys->blocksize*i) != fsys->blocksize)
fprint(2, "error writing block %lud: %r\n", i);
}
fprint(2, "%d blocks in use, %d file reads\n", n, nfilereads);
threadexitsall(nil);
}
|