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1 #!/usr/bin/env python
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2
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3 import argparse
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4
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5 __doc__ = """
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6 ISO 9660 filesystem utility.
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7 """
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8
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9
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10 class VolumeDescriptor:
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11 @classmethod
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12 def FromData(cls, d):
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13 ty = d[0]
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14 Id = d[1:6]
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15 assert Id == 'CD001'.encode('ascii')
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16 ver = d[6]
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17 assert ver == 1
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18 cls = vol_desc_types[ty]
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19 return cls(d)
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20
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21
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22 vol_desc_types = {}
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23 def vol_type(t):
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24 def reg_func(cls):
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25 vol_desc_types[t] = cls
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26 return cls
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27 return reg_func
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28
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29
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30 @vol_type(0)
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31 class BootRecordVolumeDescriptor(VolumeDescriptor):
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32 def __init__(self, d):
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33 boot_sys_id = d[7:39]
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34 boot_id = d[39:71]
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35 print(boot_sys_id)
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36 print(boot_id)
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37
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38
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39 @vol_type(1)
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40 class PrimaryVolumeDescriptor(VolumeDescriptor):
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41 def __init__(self, d):
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42 sys_id = d[8:40]
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43 vol_id = d[40:72]
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44 print(sys_id)
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45 print(vol_id)
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46
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47
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48 @vol_type(255)
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49 class VolumeDescriptorTerminator(VolumeDescriptor):
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50 def __init__(self, d):
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51 pass
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52
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53
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54 class ISOfs:
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55 def __init__(self):
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56 self.vol_descriptors = []
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57
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58 def read(self, f):
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59 # System area:
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60 self.system_area = f.read(16 * 2048)
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61 while True:
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62 d = f.read(2048)
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63 desc = VolumeDescriptor.FromData(d)
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64 self.vol_descriptors.append(desc)
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65 if type(desc) is VolumeDescriptorTerminator:
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66 break
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67
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68 def dump(self):
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69 for vd in self.vol_descriptors:
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70 print(vd)
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71
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72
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73 if __name__ == '__main__':
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74 parser = argparse.ArgumentParser(description=__doc__)
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75 parser.add_argument('filename')
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76 args = parser.parse_args()
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77 fs = ISOfs()
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78 with open(args.filename, 'rb') as f:
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79 fs.read(f)
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80 fs.dump()
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81
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82
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