Apple-2-Tools
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mdttool
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Extract to files named for volume name (ProDOS or HFS)

This commit is contained in:
Bobbi Webber-Manners 2021-05-24 21:40:18 -04:00
parent bfce2655d8
commit 3f76afefc2
1 changed files with 31 additions and 12 deletions
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43
mdttool
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@ -177,8 +177,29 @@ def write_part_tbl(f):
for i in range(254):
outfile.write(block)
# Extract partition n from file f and write it to outputfile
def extract_partition(f, n, outputfile):
# Obtain volume name of a partition
def get_volname(infile, startidx):
infile.seek(startidx * blocksz + 1024)
mdb = infile.read(2)
if (mdb[0] == 0x42) and (mdb[1] == 0x44): # HFS Signature in Block 2
fstype = 'HFS'
infile.seek(startidx * blocksz + 1024 + 36)
volbytes = infile.read(27)
volname = bytearray()
for i in range(0, volbytes[0] & 0x0f):
volname.append(volbytes[i + 1])
else:
fstype = 'ProDOS' # If not HFS, must be ProDOS
infile.seek(startidx * blocksz + 1024 + 4)
volbytes = infile.read(15)
volname = bytearray()
for i in range(0, volbytes[0] & 0x0f):
volname.append(volbytes[i + 1])
return (fstype, volname.decode('ascii'))
# Extract partition n from file f and write it to file named
# according to the volume name
def extract_partition(f, n):
if n < 8:
st = parttab['start1'][n]
ln = parttab['len1'][n]
@ -186,6 +207,12 @@ def extract_partition(f, n, outputfile):
st = parttab['start2'][n - 8]
ln = parttab['len2'][n - 8]
with open(f, 'rb') as infile:
(fstype, volname) = get_volname(infile, st)
print('** Partition ' + str(n + 1) + ' ' + fstype + ' Volume \'' + volname + '\'')
if fstype == 'HFS':
outputfile = volname + '.hfs'
elif fstype == 'ProDOS':
outputfile = volname + '.po'
infile.seek(st * blocksz)
d = infile.read(ln * blocksz)
print('Writing {} bytes to {}'.format(len(d), outputfile))
@ -195,17 +222,9 @@ def extract_partition(f, n, outputfile):
# Extract all partitions from file f
def explode_mdt_image(f):
for i in range(parttab['numparts1']):
filename = 'partition{}.po'.format(i + 1)
extract_partition(f, i, filename)
extract_partition(f, i)
for i in range(parttab['numparts2']):
filename = 'partition{}.po'.format(i + 9)
extract_partition(f, i + 8, filename)
# Replace an existing partition n in file f with file newpartfile
# Checks newpartfile is the correct size to fit the partition
def replace_partition(f, n, newpartfile):
# TODO
pass
extract_partition(f, i + 8)
# Build an MDT image file f from a list of .po files and update the
# partition table to match the files