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/* |
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* libhfs - library for reading and writing Macintosh HFS volumes |
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* Copyright (C) 1996-1998 Robert Leslie |
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* |
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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 2 of the License, or |
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* (at your option) any later version. |
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* |
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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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* |
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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, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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* |
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*/ |
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|
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# ifdef HAVE_CONFIG_H |
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# include "config.h" |
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# endif |
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|
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# include <stdlib.h> |
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# include <string.h> |
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# include <errno.h> |
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|
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# include "libhfs.h" |
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# include "block.h" |
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# include "low.h" |
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# include "medium.h" |
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|
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/* Driver Descriptor Record Routines ======================================= */ |
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|
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/* |
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* NAME: medium->zeroddr() |
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* DESCRIPTION: write a new/empty driver descriptor record |
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*/ |
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int m_zeroddr(hfsvol *vol) |
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{ |
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Block0 ddr; |
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int i; |
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|
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ASSERT(vol->pnum == 0 && vol->vlen != 0); |
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|
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ddr.sbSig = HFS_DDR_SIGWORD; |
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ddr.sbBlkSize = HFS_BLOCKSZ; |
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ddr.sbBlkCount = vol->vlen; |
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|
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ddr.sbDevType = 0; |
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ddr.sbDevId = 0; |
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ddr.sbData = 0; |
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|
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ddr.sbDrvrCount = 0; |
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|
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ddr.ddBlock = 0; |
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ddr.ddSize = 0; |
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ddr.ddType = 0; |
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|
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for (i = 0; i < 243; ++i) |
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ddr.ddPad[i] = 0; |
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|
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return l_putddr(vol, &ddr); |
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} |
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|
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/* Partition Map Routines ================================================== */ |
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|
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/* |
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* NAME: medium->zeropm() |
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* DESCRIPTION: write new/empty partition map |
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*/ |
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int m_zeropm(hfsvol *vol, unsigned int maxparts) |
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{ |
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ApplePartition map; |
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unsigned int i; |
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|
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ASSERT(vol->pnum == 0 && vol->vlen != 0); |
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|
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if (maxparts < 2) |
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ERROR(EINVAL, "must allow at least 2 partitions"); |
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|
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/* first entry: partition map itself */ |
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|
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map.pmSig = HFS_PM_SIGWORD; |
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map.pmSigPad = 0; |
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map.pmMapBlkCnt = 2; |
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|
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map.pmPyPartStart = 1; |
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map.pmPartBlkCnt = maxparts; |
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|
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strcpy((char *) map.pmPartName, "Apple"); |
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strcpy((char *) map.pmParType, "Apple_partition_map"); |
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|
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map.pmLgDataStart = 0; |
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map.pmDataCnt = map.pmPartBlkCnt; |
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|
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map.pmPartStatus = 0; |
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|
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map.pmLgBootStart = 0; |
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map.pmBootSize = 0; |
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map.pmBootAddr = 0; |
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map.pmBootAddr2 = 0; |
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map.pmBootEntry = 0; |
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map.pmBootEntry2 = 0; |
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map.pmBootCksum = 0; |
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|
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strcpy((char *) map.pmProcessor, ""); |
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|
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for (i = 0; i < 188; ++i) |
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map.pmPad[i] = 0; |
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|
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if (l_putpmentry(vol, &map, 1) == -1) |
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goto fail; |
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|
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/* second entry: rest of medium */ |
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|
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map.pmPyPartStart = 1 + maxparts; |
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map.pmPartBlkCnt = vol->vlen - 1 - maxparts; |
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|
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strcpy((char *) map.pmPartName, "Extra"); |
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strcpy((char *) map.pmParType, "Apple_Free"); |
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|
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map.pmDataCnt = map.pmPartBlkCnt; |
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|
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if (l_putpmentry(vol, &map, 2) == -1) |
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goto fail; |
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|
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/* zero rest of partition map's partition */ |
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|
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if (maxparts > 2) |
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{ |
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block b; |
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|
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memset(&b, 0, sizeof(b)); |
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|
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for (i = 3; i <= maxparts; ++i) |
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{ |
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if (b_writepb(vol, i, &b, 1) == -1) |
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goto fail; |
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} |
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} |
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|
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return 0; |
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|
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fail: |
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return -1; |
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} |
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|
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/* |
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* NAME: medium->findpmentry() |
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* DESCRIPTION: locate a partition map entry |
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*/ |
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int m_findpmentry(hfsvol *vol, const char *type, |
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ApplePartition *map, unsigned long *start) |
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{ |
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unsigned long bnum; |
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int found = 0; |
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|
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if (start && *start > 0) |
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{ |
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bnum = *start; |
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|
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/* if (bnum++ >= (unsigned long) map->pmMapBlkCnt) { |
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ERROR(EINVAL, "partition not found"); |
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}*/ |
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} |
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else |
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bnum = 1; |
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|
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while (1) |
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{ |
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if (l_getpmentry(vol, map, bnum) == -1) |
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{ |
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found = -1; |
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goto fail; |
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} |
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|
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if (map->pmSig != HFS_PM_SIGWORD) |
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{ |
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found = -1; |
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|
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if (map->pmSig == HFS_PM_SIGWORD_OLD) |
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ERROR(EINVAL, "old partition map format not supported"); |
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else |
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ERROR(EINVAL, "invalid partition map"); |
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} |
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|
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if (strcmp((char *) map->pmParType, type) == 0) |
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{ |
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found = 1; |
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goto done; |
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} |
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|
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if (bnum++ >= (unsigned long) map->pmMapBlkCnt) { |
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ERROR(EINVAL, "partition not found"); |
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} |
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} |
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|
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done: |
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/* if (start) |
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*start = bnum;*/ |
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|
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fail: |
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return found; |
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} |
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|
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/* |
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* NAME: medium->mkpart() |
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* DESCRIPTION: create a new partition from available free space |
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*/ |
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int m_mkpart(hfsvol *vol, |
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const char *name, const char *type, unsigned long len) |
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{ |
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ApplePartition map; |
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unsigned int nparts, maxparts; |
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unsigned long bnum, start, remain; |
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int found; |
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|
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if (strlen(name) > 32 || |
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strlen(type) > 32) |
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ERROR(EINVAL, "partition name/type can each be at most 32 chars"); |
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|
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if (len == 0) |
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ERROR(EINVAL, "partition length must be > 0"); |
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|
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found = m_findpmentry(vol, "Apple_partition_map", &map, 0); |
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if (found == -1) |
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goto fail; |
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|
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if (! found) |
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ERROR(EIO, "cannot find partition map's partition"); |
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|
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nparts = map.pmMapBlkCnt; |
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maxparts = map.pmPartBlkCnt; |
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|
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bnum = 0; |
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do |
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{ |
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found = m_findpmentry(vol, "Apple_Free", &map, &bnum); |
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if (found == -1) |
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goto fail; |
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|
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if (! found) |
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ERROR(ENOSPC, "no available partitions"); |
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} |
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while (len > (unsigned long) map.pmPartBlkCnt); |
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|
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start = (unsigned long) map.pmPyPartStart + len; |
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remain = (unsigned long) map.pmPartBlkCnt - len; |
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|
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if (remain && nparts >= maxparts) |
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ERROR(EINVAL, "must allocate all blocks in free space"); |
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|
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map.pmPartBlkCnt = len; |
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|
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strcpy((char *) map.pmPartName, name); |
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strcpy((char *) map.pmParType, type); |
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|
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map.pmLgDataStart = 0; |
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map.pmDataCnt = len; |
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|
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map.pmPartStatus = 0; |
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|
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if (l_putpmentry(vol, &map, bnum) == -1) |
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goto fail; |
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|
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if (remain) |
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{ |
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map.pmPyPartStart = start; |
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map.pmPartBlkCnt = remain; |
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|
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strcpy((char *) map.pmPartName, "Extra"); |
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strcpy((char *) map.pmParType, "Apple_Free"); |
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|
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map.pmDataCnt = remain; |
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|
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if (l_putpmentry(vol, &map, ++nparts) == -1) |
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goto fail; |
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|
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for (bnum = 1; bnum <= nparts; ++bnum) |
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{ |
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if (l_getpmentry(vol, &map, bnum) == -1) |
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goto fail; |
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|
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map.pmMapBlkCnt = nparts; |
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|
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if (l_putpmentry(vol, &map, bnum) == -1) |
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goto fail; |
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} |
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} |
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|
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return 0; |
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|
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fail: |
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return -1; |
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} |
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|
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/* Boot Blocks Routines ==================================================== */ |
| 300 |
|
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/* |
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* NAME: medium->zerobb() |
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* DESCRIPTION: write new/empty volume boot blocks |
| 304 |
*/ |
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int m_zerobb(hfsvol *vol) |
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{ |
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block b; |
| 308 |
|
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memset(&b, 0, sizeof(b)); |
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|
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if (b_writelb(vol, 0, &b) == -1 || |
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b_writelb(vol, 1, &b) == -1) |
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goto fail; |
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|
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return 0; |
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|
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fail: |
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return -1; |
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} |
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