Mercurial > lcfOS
comparison python/iso9660.py @ 283:c9781c73e7e2
Added first kernel files
| author | Windel Bouwman |
|---|---|
| date | Fri, 15 Nov 2013 12:26:50 +0100 |
| parents | |
| children | 1c7c1e619be8 |
comparison
equal
deleted
inserted
replaced
| 282:c137f1fe3e65 | 283:c9781c73e7e2 |
|---|---|
| 1 | |
| 2 import argparse | |
| 3 | |
| 4 """ | |
| 5 ISO 9660 filesystem utility. | |
| 6 """ | |
| 7 | |
| 8 def read_vol_desc(f): | |
| 9 s = f.read(2048) | |
| 10 ty = s[0] | |
| 11 Id = s[1:6] | |
| 12 assert Id == 'CD001'.encode('ascii') | |
| 13 ver = s[6] | |
| 14 assert ver == 1 | |
| 15 data = s[7:] | |
| 16 assert len(data) == 2041 | |
| 17 return ty, Id, s | |
| 18 | |
| 19 def parse_boot_record(sec): | |
| 20 boot_sys_id = sec[7:39] | |
| 21 boot_id = sec[39:71] | |
| 22 print(boot_sys_id) | |
| 23 print(boot_id) | |
| 24 | |
| 25 def parse_primary_volume(sec): | |
| 26 sys_id = sec[8:40] | |
| 27 vol_id = sec[40:72] | |
| 28 print(sys_id) | |
| 29 print(vol_id) | |
| 30 | |
| 31 def read_iso(f): | |
| 32 # System area | |
| 33 system = f.read(16 * 2048) | |
| 34 while True: | |
| 35 ty, Id, dat = read_vol_desc(f) | |
| 36 print(ty, Id) | |
| 37 if ty == 255: | |
| 38 break | |
| 39 elif ty == 0: | |
| 40 parse_boot_record(dat) | |
| 41 elif ty == 1: | |
| 42 parse_primary_volume(dat) | |
| 43 | |
| 44 | |
| 45 if __name__ == '__main__': | |
| 46 with open('mikeos.iso', 'rb') as f: | |
| 47 read_iso(f) | |
| 48 | |
| 49 |