mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-29 05:29:47 +00:00
319 lines
6.4 KiB
C
319 lines
6.4 KiB
C
/*
|
|
* libhfs - library for reading and writing Macintosh HFS volumes
|
|
* Copyright (C) 1996-1998 Robert Leslie
|
|
*
|
|
* 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: medium.c,v 1.4 1998/11/02 22:09:04 rob Exp $
|
|
*/
|
|
|
|
# ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
# endif
|
|
|
|
# include <stdlib.h>
|
|
# include <string.h>
|
|
# include <errno.h>
|
|
|
|
# include "libhfs.h"
|
|
# include "block.h"
|
|
# include "low.h"
|
|
# include "medium.h"
|
|
|
|
/* Driver Descriptor Record Routines ======================================= */
|
|
|
|
/*
|
|
* NAME: medium->zeroddr()
|
|
* DESCRIPTION: write a new/empty driver descriptor record
|
|
*/
|
|
int m_zeroddr(hfsvol *vol)
|
|
{
|
|
Block0 ddr;
|
|
int i;
|
|
|
|
ASSERT(vol->pnum == 0 && vol->vlen != 0);
|
|
|
|
ddr.sbSig = HFS_DDR_SIGWORD;
|
|
ddr.sbBlkSize = HFS_BLOCKSZ;
|
|
ddr.sbBlkCount = vol->vlen;
|
|
|
|
ddr.sbDevType = 0;
|
|
ddr.sbDevId = 0;
|
|
ddr.sbData = 0;
|
|
|
|
ddr.sbDrvrCount = 0;
|
|
|
|
ddr.ddBlock = 0;
|
|
ddr.ddSize = 0;
|
|
ddr.ddType = 0;
|
|
|
|
for (i = 0; i < 243; ++i)
|
|
ddr.ddPad[i] = 0;
|
|
|
|
return l_putddr(vol, &ddr);
|
|
}
|
|
|
|
/* Partition Map Routines ================================================== */
|
|
|
|
/*
|
|
* NAME: medium->zeropm()
|
|
* DESCRIPTION: write new/empty partition map
|
|
*/
|
|
int m_zeropm(hfsvol *vol, unsigned int maxparts)
|
|
{
|
|
Partition map;
|
|
unsigned int i;
|
|
|
|
ASSERT(vol->pnum == 0 && vol->vlen != 0);
|
|
|
|
if (maxparts < 2)
|
|
ERROR(EINVAL, "must allow at least 2 partitions");
|
|
|
|
/* first entry: partition map itself */
|
|
|
|
map.pmSig = HFS_PM_SIGWORD;
|
|
map.pmSigPad = 0;
|
|
map.pmMapBlkCnt = 2;
|
|
|
|
map.pmPyPartStart = 1;
|
|
map.pmPartBlkCnt = maxparts;
|
|
|
|
strcpy((char *) map.pmPartName, "Apple");
|
|
strcpy((char *) map.pmParType, "Apple_partition_map");
|
|
|
|
map.pmLgDataStart = 0;
|
|
map.pmDataCnt = map.pmPartBlkCnt;
|
|
|
|
map.pmPartStatus = 0;
|
|
|
|
map.pmLgBootStart = 0;
|
|
map.pmBootSize = 0;
|
|
map.pmBootAddr = 0;
|
|
map.pmBootAddr2 = 0;
|
|
map.pmBootEntry = 0;
|
|
map.pmBootEntry2 = 0;
|
|
map.pmBootCksum = 0;
|
|
|
|
strcpy((char *) map.pmProcessor, "");
|
|
|
|
for (i = 0; i < 188; ++i)
|
|
map.pmPad[i] = 0;
|
|
|
|
if (l_putpmentry(vol, &map, 1) == -1)
|
|
goto fail;
|
|
|
|
/* second entry: rest of medium */
|
|
|
|
map.pmPyPartStart = 1 + maxparts;
|
|
map.pmPartBlkCnt = vol->vlen - 1 - maxparts;
|
|
|
|
strcpy((char *) map.pmPartName, "Extra");
|
|
strcpy((char *) map.pmParType, "Apple_Free");
|
|
|
|
map.pmDataCnt = map.pmPartBlkCnt;
|
|
|
|
if (l_putpmentry(vol, &map, 2) == -1)
|
|
goto fail;
|
|
|
|
/* zero rest of partition map's partition */
|
|
|
|
if (maxparts > 2)
|
|
{
|
|
block b;
|
|
|
|
memset(&b, 0, sizeof(b));
|
|
|
|
for (i = 3; i <= maxparts; ++i)
|
|
{
|
|
if (b_writepb(vol, i, &b, 1) == -1)
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* NAME: medium->findpmentry()
|
|
* DESCRIPTION: locate a partition map entry
|
|
*/
|
|
int m_findpmentry(hfsvol *vol, const char *type,
|
|
Partition *map, unsigned long *start)
|
|
{
|
|
unsigned long bnum;
|
|
int found = 0;
|
|
|
|
if (start && *start > 0)
|
|
{
|
|
bnum = *start;
|
|
|
|
if (bnum++ >= (unsigned long) map->pmMapBlkCnt)
|
|
ERROR(EINVAL, "partition not found");
|
|
}
|
|
else
|
|
bnum = 1;
|
|
|
|
while (1)
|
|
{
|
|
if (l_getpmentry(vol, map, bnum) == -1)
|
|
{
|
|
found = -1;
|
|
goto fail;
|
|
}
|
|
|
|
if (map->pmSig != HFS_PM_SIGWORD)
|
|
{
|
|
found = -1;
|
|
|
|
if (map->pmSig == HFS_PM_SIGWORD_OLD)
|
|
ERROR(EINVAL, "old partition map format not supported");
|
|
else
|
|
ERROR(EINVAL, "invalid partition map");
|
|
}
|
|
|
|
if (strcmp((char *) map->pmParType, type) == 0)
|
|
{
|
|
found = 1;
|
|
goto done;
|
|
}
|
|
|
|
if (bnum++ >= (unsigned long) map->pmMapBlkCnt)
|
|
ERROR(EINVAL, "partition not found");
|
|
}
|
|
|
|
done:
|
|
if (start)
|
|
*start = bnum;
|
|
|
|
fail:
|
|
return found;
|
|
}
|
|
|
|
/*
|
|
* NAME: medium->mkpart()
|
|
* DESCRIPTION: create a new partition from available free space
|
|
*/
|
|
int m_mkpart(hfsvol *vol,
|
|
const char *name, const char *type, unsigned long len)
|
|
{
|
|
Partition map;
|
|
unsigned int nparts, maxparts;
|
|
unsigned long bnum, start, remain;
|
|
int found;
|
|
|
|
if (strlen(name) > 32 ||
|
|
strlen(type) > 32)
|
|
ERROR(EINVAL, "partition name/type can each be at most 32 chars");
|
|
|
|
if (len == 0)
|
|
ERROR(EINVAL, "partition length must be > 0");
|
|
|
|
found = m_findpmentry(vol, "Apple_partition_map", &map, 0);
|
|
if (found == -1)
|
|
goto fail;
|
|
|
|
if (! found)
|
|
ERROR(EIO, "cannot find partition map's partition");
|
|
|
|
nparts = map.pmMapBlkCnt;
|
|
maxparts = map.pmPartBlkCnt;
|
|
|
|
bnum = 0;
|
|
do
|
|
{
|
|
found = m_findpmentry(vol, "Apple_Free", &map, &bnum);
|
|
if (found == -1)
|
|
goto fail;
|
|
|
|
if (! found)
|
|
ERROR(ENOSPC, "no available partitions");
|
|
}
|
|
while (len > (unsigned long) map.pmPartBlkCnt);
|
|
|
|
start = (unsigned long) map.pmPyPartStart + len;
|
|
remain = (unsigned long) map.pmPartBlkCnt - len;
|
|
|
|
if (remain && nparts >= maxparts)
|
|
ERROR(EINVAL, "must allocate all blocks in free space");
|
|
|
|
map.pmPartBlkCnt = len;
|
|
|
|
strcpy((char *) map.pmPartName, name);
|
|
strcpy((char *) map.pmParType, type);
|
|
|
|
map.pmLgDataStart = 0;
|
|
map.pmDataCnt = len;
|
|
|
|
map.pmPartStatus = 0;
|
|
|
|
if (l_putpmentry(vol, &map, bnum) == -1)
|
|
goto fail;
|
|
|
|
if (remain)
|
|
{
|
|
map.pmPyPartStart = start;
|
|
map.pmPartBlkCnt = remain;
|
|
|
|
strcpy((char *) map.pmPartName, "Extra");
|
|
strcpy((char *) map.pmParType, "Apple_Free");
|
|
|
|
map.pmDataCnt = remain;
|
|
|
|
if (l_putpmentry(vol, &map, ++nparts) == -1)
|
|
goto fail;
|
|
|
|
for (bnum = 1; bnum <= nparts; ++bnum)
|
|
{
|
|
if (l_getpmentry(vol, &map, bnum) == -1)
|
|
goto fail;
|
|
|
|
map.pmMapBlkCnt = nparts;
|
|
|
|
if (l_putpmentry(vol, &map, bnum) == -1)
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
return -1;
|
|
}
|
|
|
|
/* Boot Blocks Routines ==================================================== */
|
|
|
|
/*
|
|
* NAME: medium->zerobb()
|
|
* DESCRIPTION: write new/empty volume boot blocks
|
|
*/
|
|
int m_zerobb(hfsvol *vol)
|
|
{
|
|
block b;
|
|
|
|
memset(&b, 0, sizeof(b));
|
|
|
|
if (b_writelb(vol, 0, &b) == -1 ||
|
|
b_writelb(vol, 1, &b) == -1)
|
|
goto fail;
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
return -1;
|
|
}
|