39 lines
1.0 KiB
Python
39 lines
1.0 KiB
Python
import io
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from PyRomfsImage import *
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from .matcher import SignatureMatcher, Match
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class RomFS(SignatureMatcher):
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"""
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RomFS a readonly file system
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big-endian
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https://www.kernel.org/doc/Documentation/filesystems/romfs.txt
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"""
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def __init__(self, file):
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self.name = "RomFS"
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self.signature = b'-rom1fs-'
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super().__init__(file)
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def is_valid(self):
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for match in self.search():
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start = match
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header = io.BytesIO(self.file[start:start+14])
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magic = header.read(8)
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fullsize = header.read(4)
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checksum = header.read(4)
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fullsize = int.from_bytes(fullsize, 'big')
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self.matches += [Match(start, fullsize)]
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return len(self.matches) != 0
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def view(self, match, root_folder):
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start = match.offset
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length = match.length
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raw = io.BytesIO(self.file[start:start+length])
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rom = Romfs(raw)
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root = rom.getRoot()
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print(root.name)
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for ch in root.children:
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print(ch.name)
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