tfmtisect.c - plan9port - [fork] Plan 9 from user space
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       ---
       tfmtisect.c (1455B)
       ---
            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 }