100 lines
2.7 KiB
C
Executable File
100 lines
2.7 KiB
C
Executable File
/*
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libparted - a library for manipulating disk partitions
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Copyright (C) 2004-2005, 2007, 2009-2014, 2019-2023 Free Software
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Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <parted/parted.h>
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#include <parted/endian.h>
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#include <parted/debug.h>
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#include <stdint.h>
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#if ENABLE_NLS
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# include <libintl.h>
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# define _(String) dgettext (PACKAGE, String)
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#else
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# define _(String) (String)
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#endif /* ENABLE_NLS */
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#include "hfs.h"
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#include "probe.h"
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int
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hfsc_can_use_geom (PedGeometry* geom)
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{
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PedDevice* dev;
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dev = geom->dev;
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PED_ASSERT (geom != NULL);
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PED_ASSERT (dev != NULL);
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if (dev->sector_size != PED_SECTOR_SIZE_DEFAULT) {
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ped_exception_throw (
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PED_EXCEPTION_ERROR,
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PED_EXCEPTION_CANCEL,
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_("Parted can't use HFS file systems on disks "
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"with a sector size not equal to %d bytes."),
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(int)PED_SECTOR_SIZE_DEFAULT );
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return 0;
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}
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return 1;
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}
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/* Probe an HFS volume, detecting it even if
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it is in fact a wrapper to an HFS+ volume */
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/* Used by hfsplus_probe and hfs_probe */
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PedGeometry*
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hfs_and_wrapper_probe (PedGeometry* geom)
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{
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uint8_t buf[PED_SECTOR_SIZE_DEFAULT];
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HfsMasterDirectoryBlock *mdb;
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PedGeometry* geom_ret;
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PedSector search, max;
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PED_ASSERT (geom != NULL);
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PED_ASSERT (hfsc_can_use_geom (geom));
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mdb = (HfsMasterDirectoryBlock *) buf;
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/* is 5 an intelligent value ? */
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if ((geom->length < 5)
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|| (!ped_geometry_read (geom, buf, 2, 1))
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|| (mdb->signature != PED_CPU_TO_BE16 (HFS_SIGNATURE)) )
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return NULL;
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search = ((PedSector) PED_BE16_TO_CPU (mdb->start_block)
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+ ((PedSector) PED_BE16_TO_CPU (mdb->total_blocks)
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* (PED_BE32_TO_CPU (mdb->block_size) / PED_SECTOR_SIZE_DEFAULT )));
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max = search + (PED_BE32_TO_CPU (mdb->block_size) / PED_SECTOR_SIZE_DEFAULT);
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if (!(geom_ret = ped_geometry_new (geom->dev, geom->start, search + 2)))
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return NULL;
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for (; search < max; search++) {
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if (!ped_geometry_set (geom_ret, geom_ret->start, search + 2)
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|| !ped_geometry_read (geom_ret, buf, search, 1))
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break;
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if (mdb->signature == PED_CPU_TO_BE16 (HFS_SIGNATURE))
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return geom_ret;
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}
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ped_geometry_destroy (geom_ret);
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return NULL;
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}
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