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/*
libparted - a library for manipulating disk partitions
Copyright (C) 2004-2005, 2007, 2009-2014, 2019-2023 Free Software
Foundation, Inc.
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <parted/parted.h>
#include <parted/endian.h>
#include <parted/debug.h>
#include <stdint.h>
#if ENABLE_NLS
# include <libintl.h>
# define _(String) dgettext (PACKAGE, String)
#else
# define _(String) (String)
#endif /* ENABLE_NLS */
#include "hfs.h"
#include "probe.h"
int
hfsc_can_use_geom (PedGeometry* geom)
{
PedDevice* dev;
dev = geom->dev;
PED_ASSERT (geom != NULL);
PED_ASSERT (dev != NULL);
if (dev->sector_size != PED_SECTOR_SIZE_DEFAULT) {
ped_exception_throw (
PED_EXCEPTION_ERROR,
PED_EXCEPTION_CANCEL,
_("Parted can't use HFS file systems on disks "
"with a sector size not equal to %d bytes."),
(int)PED_SECTOR_SIZE_DEFAULT );
return 0;
}
return 1;
}
/* Probe an HFS volume, detecting it even if
it is in fact a wrapper to an HFS+ volume */
/* Used by hfsplus_probe and hfs_probe */
PedGeometry*
hfs_and_wrapper_probe (PedGeometry* geom)
{
uint8_t buf[PED_SECTOR_SIZE_DEFAULT];
HfsMasterDirectoryBlock *mdb;
PedGeometry* geom_ret;
PedSector search, max;
PED_ASSERT (geom != NULL);
PED_ASSERT (hfsc_can_use_geom (geom));
mdb = (HfsMasterDirectoryBlock *) buf;
/* is 5 an intelligent value ? */
if ((geom->length < 5)
|| (!ped_geometry_read (geom, buf, 2, 1))
|| (mdb->signature != PED_CPU_TO_BE16 (HFS_SIGNATURE)) )
return NULL;
search = ((PedSector) PED_BE16_TO_CPU (mdb->start_block)
+ ((PedSector) PED_BE16_TO_CPU (mdb->total_blocks)
* (PED_BE32_TO_CPU (mdb->block_size) / PED_SECTOR_SIZE_DEFAULT )));
max = search + (PED_BE32_TO_CPU (mdb->block_size) / PED_SECTOR_SIZE_DEFAULT);
if (!(geom_ret = ped_geometry_new (geom->dev, geom->start, search + 2)))
return NULL;
for (; search < max; search++) {
if (!ped_geometry_set (geom_ret, geom_ret->start, search + 2)
|| !ped_geometry_read (geom_ret, buf, search, 1))
break;
if (mdb->signature == PED_CPU_TO_BE16 (HFS_SIGNATURE))
return geom_ret;
}
ped_geometry_destroy (geom_ret);
return NULL;
}
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