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#include <u.h>
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#include <libc.h>
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#include <auth.h>
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#include <fcall.h>
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#include <thread.h>
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#include <9p.h>
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#include "flashfs.h"
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static void
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usage(void)
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{
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	fprint(2, "usage: %s [-n nsect] [-z sectsize] file\n", argv0);
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	exits("usage");
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}
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static ulong
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argval(char *arg)
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{
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	long v;
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	char *extra;
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	if(arg == nil)
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		usage();
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	v = strtol(arg, &extra, 0);
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	if(*extra || v <= 0)
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		usage();
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	return v;
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}
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void
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main(int argc, char **argv)
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{
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	ulong i;
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	int m, n;
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	char *file;
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	uchar hdr[MAXHDR];
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	ARGBEGIN {
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	case 'n':
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		nsects = argval(ARGF());
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		break;
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	case 'z':
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		sectsize = argval(ARGF());
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		break;
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	default:
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		usage();
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	} ARGEND
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	if(argc != 1)
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		usage();
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	file = argv[0];
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	sectbuff = emalloc9p(sectsize);
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	initdata(file, 1);
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	memmove(hdr, magic, MAGSIZE);
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	m = putc3(&hdr[MAGSIZE], 0);
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	n = putc3(&hdr[MAGSIZE + m], 0);
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	clearsect(0);
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	writedata(0, 0, hdr, MAGSIZE + m + n, 0);
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	for(i = 1; i < nsects - 1; i++)
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		clearsect(i);
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	m = putc3(&hdr[MAGSIZE], 1);
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	n = putc3(&hdr[MAGSIZE + m], 0);
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	clearsect(nsects - 1);
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	writedata(0, nsects - 1, hdr, MAGSIZE + m + n, 0);
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}