#include <u.h>#include <libc.h> /* WARNING.  must keep in sync with your fs */ enum{	RBUFSIZE		= 8192,}; enum{	Tnone		= 0,	Tsuper,			/* the super block */	Tdirold,	Tind1old,	Tind2old,	Tfile,			/* file contents */	Tfree,			/* in free list */	Tbuck,			/* cache fs bucket */	Tvirgo,			/* fake worm virgin bits */	Tcache,			/* cw cache things */	Tconfig,		/* configuration block */	/* Tdir & indirect blocks are last to allow for greater depth */	Tdir,			/* directory contents */	Tind1,			/* points to blocks */	Tind2,			/* points to Tind1 */	Tind3,			/* points to Tind2 */	Tind4,			/* points to Tind3 */	Maxtind,	MAXTAG, 	Tmaxind = Maxtind - 1,}; enum {	Tagsz		= 12,	BUFSIZE	= RBUFSIZE-Tagsz,}; typedef	struct	Tag	Tag;typedef	struct	Iobuf	Iobuf;typedef		uvlong	Off; struct	Tag{	uchar	pad[2];	uchar	tag[2];	uchar	path[8];		/* make tag end at a long boundary */}; struct	Iobuf{	char	iobuf[RBUFSIZE];	/* only active while locked */	int	flags;}; voidsettag(Iobuf *p, int tag){	Tag *t; 	t = (Tag*)(p->iobuf+BUFSIZE);	putle(t->tag, tag, 2);	putle(t->path, 0, 8);} voidusage(void){	fprint(2, "usage: mkfsconf < config\n");	exits("usage");} voidmain(int argc, char **argv){	Iobuf p; 	ARGBEGIN{	default:		usage();	}ARGEND	if(argc)		usage(); 	memset(&p, 0, sizeof p);	read(0, p.iobuf, BUFSIZE);	settag(&p, Tconfig);	write(1, p.iobuf, RBUFSIZE);	exits("");}