/* vi:set tabstop=2 shiftwidth=2 cindent: */
/*
 * libvxfs - library for reading Veritas Journaled FileSystem (VxFS)
 * Copyright (c) 1999 Martin Hinner <mhi@penguin.cz>
 *
 * super.c: VxFS superblock and mount routines
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * $Id$
 */
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>

#include <libvxfs.h>

struct vxfs_super vxsb;

int
vx_readsuper (void)
{
	void *block;

	block = vxread (1, 1);
	memcpy (&vxsb, block, sizeof (vxsb));
	if (vxsb.magic != VXFS_MAGIC)
		{
			if (vxverbose)
				fprintf (stderr, "read_super: Invalid magic number (vxsb.magic=%08x)\n",
								 vxsb.magic);
			return -1;
		}

	/*
	 * XXX: superblock checksum 
	 */
	/*
	 * XXX: Check version 
	 */

	if (vxdebug)
		{
			printf ("VxFS version = %u\n", vxsb.version);
			printf ("Volume label = %s\n", vxsb.fname);
			printf ("Pack label = %s\n", vxsb.fpack);
		}
	free (block);
	return 0;
}

int
vx_open (char *device, int subpart)
{
	if (vxdebug)
		printf ("Opening VxFS %s..\n", device);

	if (vxopendev (device) < 0)
		{
			if (vxverbose)
				fprintf (stderr, "vx_open: vxopendev failed\n");
			return -1;
		}

	if (vxsetpart (subpart) < 0)
		{
			if (vxverbose)
				fprintf (stderr, "vx_open: vxsetpart failed\n");
			return -1;
		}
	
	if (vxdebug)
		printf("Reading filesystem structures...\n");

	if (vx_readsuper () < 0)
		return -1;

	if (vx_readolt () < 0)
		return -1;

	/*
	 * XXX: current usage table 
	 */

	if (vxdebug)
		printf ("VxFS initialized\n");

	return 0;
}