#include <u.h>
#include <libc.h>
#include <bio.h>
#include "cram.h"

void
usage(void)
{
	fprint(2, "usage: %s [-d] file offset\n", argv0);
	exits("usage");
}

void
main(int argc, char **argv)
{
	int dironly;
	Biobuf *disk;
	Dentry dir, f;
	int i, n;

	dironly = 0;
	ARGBEGIN {
	case 'd':
		dironly++;
		break;
	default:
		usage();
	} ARGEND;

	if(argc != 2)
		usage();

	if((disk = Bopen(argv[0], OREAD)) == nil)
		sysfatal("open: %r");
	if(readdentry(disk, &dir, atoll(argv[1])) < 0)
		sysfatal("read dentry: %r");
	printdentry("", &dir);

	if(dironly)
		exits(nil);

	for(i=0; i < dir.length; i+=n) {
		if((n = readdentry(disk, &f, dir.data + i)) < 0)
			print("read f %#llx: %r\n", dir.data + i);
		else {
			print("	%d	", n);
			printdentry("	", &f);
		}
	}

	exits(nil);
}