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#include "stdinc.h"
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#include "dat.h"
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#include "fns.h"
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void
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usage(void)
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{
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	fprint(2, "usage: fmtisect [-Z] [-b blocksize] name file\n");
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	threadexitsall(0);
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}
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void
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threadmain(int argc, char *argv[])
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{
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	int vers;
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	ISect *is;
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	Part *part;
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	char *file, *name;
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	int blocksize, setsize, zero;
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	ventifmtinstall();
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	statsinit();
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	blocksize = 8 * 1024;
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	setsize = 512 * 1024;
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	zero = -1;
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	vers = ISectVersion2;
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	ARGBEGIN{
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	case 'b':
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		blocksize = unittoull(ARGF());
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		if(blocksize == ~0)
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			usage();
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		if(blocksize > MaxDiskBlock){
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			fprint(2, "block size too large, max %d\n", MaxDiskBlock);
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			threadexitsall("usage");
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		}
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		break;
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	case '1':
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		vers = ISectVersion1;
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		break;
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	case 'Z':
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		zero = 0;
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		break;
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	default:
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		usage();
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		break;
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	}ARGEND
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	if(zero == -1){
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		if(vers == ISectVersion1)
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			zero = 1;
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		else
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			zero = 0;
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	}
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	if(argc != 2)
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		usage();
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	name = argv[0];
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	file = argv[1];
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	if(nameok(name) < 0)
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		sysfatal("illegal name %s", name);
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	part = initpart(file, ORDWR|ODIRECT);
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	if(part == nil)
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		sysfatal("can't open partition %s: %r", file);
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	if(zero)
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		zeropart(part, blocksize);
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	is = newisect(part, vers, name, blocksize, setsize);
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	if(is == nil)
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		sysfatal("can't initialize new index: %r");
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	fprint(2, "fmtisect %s: %,d buckets of %,d entries, %,d bytes for index map\n",
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		file, is->blocks, is->buckmax, setsize);
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	if(wbisect(is) < 0)
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		fprint(2, "can't write back index section header for %s: %r\n", file);
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	threadexitsall(0);
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}