1 #include "stdinc.h"
2 #include "dat.h"
3 #include "fns.h"
4 
5 void
6 usage(void)
7 {
8 	fprint(2, "usage: fmtisect [-1Z] [-b blocksize] name file\n");
9 	threadexitsall(0);
10 }
11 
12 void
13 threadmain(int argc, char *argv[])
14 {
15 	int vers;
16 	ISect *is;
17 	Part *part;
18 	char *file, *name;
19 	int blocksize, setsize, zero;
20 
21 	ventifmtinstall();
22 	statsinit();
23 
24 	blocksize = 8 * 1024;
25 	setsize = 512 * 1024;
26 	zero = -1;
27 	vers = ISectVersion2;
28 	ARGBEGIN{
29 	case 'b':
30 		blocksize = unittoull(ARGF());
31 		if(blocksize == ~0)
32 			usage();
33 		if(blocksize > MaxDiskBlock){
34 			fprint(2, "block size too large, max %d\n", MaxDiskBlock);
35 			threadexitsall("usage");
36 		}
37 		break;
38 	case '1':
39 		vers = ISectVersion1;
40 		break;
41 	case 'Z':
42 		zero = 0;
43 		break;
44 	default:
45 		usage();
46 		break;
47 	}ARGEND
48 
49 	if(zero == -1){
50 		if(vers == ISectVersion1)
51 			zero = 1;
52 		else
53 			zero = 0;
54 	}
55 
56 	if(argc != 2)
57 		usage();
58 
59 	name = argv[0];
60 	file = argv[1];
61 
62 	if(nameok(name) < 0)
63 		sysfatal("illegal name %s", name);
64 
65 	part = initpart(file, ORDWR|ODIRECT);
66 	if(part == nil)
67 		sysfatal("can't open partition %s: %r", file);
68 
69 	if(zero)
70 		zeropart(part, blocksize);
71 
72 	is = newisect(part, vers, name, blocksize, setsize);
73 	if(is == nil)
74 		sysfatal("can't initialize new index: %r");
75 
76 	fprint(2, "fmtisect %s: %,d buckets of %,d entries, %,d bytes for index map\n",
77 		file, is->blocks, is->buckmax, setsize);
78 
79 	if(wbisect(is) < 0)
80 		fprint(2, "can't write back index section header for %s: %r\n", file);
81 
82 	threadexitsall(0);
83 }