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54 lines
1.7 KiB
Plaintext
54 lines
1.7 KiB
Plaintext
import argparse
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import os
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from os import path
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from sys import stderr
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from tbxi.lowlevel import MAGIC
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from tbxi.prcldump import dump
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parser = argparse.ArgumentParser(description='''
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Dump a MacOS parcel blob (magic number 0x7072636C 'prcl') to a
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plain-text Parcelfile and several decompressed binaries. This output
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can be rebuilt using the Parcel Compiler (prclc). Usually parcel
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blobs are found embedded inside a file called "Mac OS ROM", although
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the Blue Box uses them in isolation. As a convenience this utility
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will search for the magic number inside any input file (with a
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warning).
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''')
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parser.add_argument('source', nargs=1, help='file to be decompiled')
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meg = parser.add_mutually_exclusive_group()
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meg.add_argument('-d', metavar='dest-dir', help='output directory (Parcelfile will be created within)')
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meg.add_argument('-f', metavar='dest-file', help='output file (binaries will go in parent directory)')
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args = parser.parse_args()
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with open(args.source[0], 'rb') as f:
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binary = f.read()
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if not binary.startswith(MAGIC):
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try:
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offset = binary.index(MAGIC)
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except ValueError:
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print('Not a parcels file', file=stderr)
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exit(1)
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else:
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print('Warning: parcel blob wrapped at offset 0x%x' % offset)
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binary = binary[offset:]
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if args.f:
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dest_file = path.abspath(args.f)
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dest_dir = path.dirname(dest_file)
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elif args.d:
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dest_dir = path.abspath(args.d)
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dest_file = path.join(dest_dir, 'Parcelfile')
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else:
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dest_dir = path.abspath(args.source[0].rstrip(path.sep) + '-dump')
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dest_file = path.join(dest_dir, 'Parcelfile')
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os.makedirs(dest_dir, exist_ok=True)
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dump(binary, dest_file, dest_dir)
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