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283
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1
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2 import argparse
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3
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4 """
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5 ISO 9660 filesystem utility.
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6 """
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7
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8 def read_vol_desc(f):
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9 s = f.read(2048)
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10 ty = s[0]
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11 Id = s[1:6]
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12 assert Id == 'CD001'.encode('ascii')
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13 ver = s[6]
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14 assert ver == 1
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15 data = s[7:]
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16 assert len(data) == 2041
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17 return ty, Id, s
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18
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19 def parse_boot_record(sec):
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20 boot_sys_id = sec[7:39]
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21 boot_id = sec[39:71]
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22 print(boot_sys_id)
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23 print(boot_id)
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24
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25 def parse_primary_volume(sec):
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26 sys_id = sec[8:40]
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27 vol_id = sec[40:72]
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28 print(sys_id)
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29 print(vol_id)
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30
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31 def read_iso(f):
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32 # System area
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33 system = f.read(16 * 2048)
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34 while True:
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35 ty, Id, dat = read_vol_desc(f)
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36 print(ty, Id)
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37 if ty == 255:
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38 break
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39 elif ty == 0:
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40 parse_boot_record(dat)
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41 elif ty == 1:
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42 parse_primary_volume(dat)
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43
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44
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45 if __name__ == '__main__':
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46 with open('mikeos.iso', 'rb') as f:
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47 read_iso(f)
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48
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49
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