mirror of
https://github.com/eledio-devices/thirdparty-littlefs.git
synced 2025-10-31 16:14:16 +01:00
40 lines
832 B
Python
Executable File
40 lines
832 B
Python
Executable File
#!/usr/bin/env python
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import struct
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import sys
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import os
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def main(*paths):
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# find most recent block
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file = None
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rev = None
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for path in paths:
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try:
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nfile = open(path, 'r+b')
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nrev, = struct.unpack('<I', nfile.read(4))
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assert rev != nrev
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if not file or ((rev - nrev) & 0x80000000):
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file = nfile
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rev = nrev
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except IOError:
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pass
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# go to last commit
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tag = 0
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while True:
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try:
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ntag, = struct.unpack('<I', file.read(4))
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except struct.error:
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break
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tag ^= ntag
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file.seek(tag & 0xfff, os.SEEK_CUR)
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# lob off last 3 bytes
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file.seek(-((tag & 0xfff) + 3), os.SEEK_CUR)
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file.truncate()
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if __name__ == "__main__":
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main(*sys.argv[1:])
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