59 lines
1.6 KiB
Python
59 lines
1.6 KiB
Python
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import argparse
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import struct
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def read_entry(f) -> dict:
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name = struct.unpack_from("12s", f.read(12))[0]
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uid = struct.unpack_from(">I", f.read(4))[0]
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gid = struct.unpack_from(">H", f.read(2))[0]
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is_file = struct.unpack_from("?", f.read(1))[0]
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modes = struct.unpack_from("BBB", f.read(3))
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attr = struct.unpack_from("B", f.read(2))[0]
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x3 = struct.unpack_from(">I", f.read(4))[0]
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num_children = struct.unpack_from(">I", f.read(4))[0]
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children = []
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for i in range(num_children):
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children.append(read_entry(f))
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return {
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"name": name,
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"uid": uid,
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"gid": gid,
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"is_file": is_file,
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"modes": modes,
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"attr": attr,
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"x3": x3,
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"children": children,
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}
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COLOR_RESET = "\x1b[0;00m"
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BOLD = "\x1b[0;37m"
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COLOR_BLUE = "\x1b[1;34m"
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COLOR_GREEN = "\x1b[0;32m"
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def print_entry(entry, indent) -> None:
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mode_str = {0: "--", 1: "r-", 2: "-w", 3: "rw"}
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sp = ' ' * indent
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color = BOLD if entry["is_file"] else COLOR_BLUE
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owner = f"{COLOR_GREEN}{entry['uid']:04x}{COLOR_RESET}:{entry['gid']:04x}"
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attrs = f"{''.join(mode_str[mode] for mode in entry['modes'])}"
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other_attrs = f"{entry['attr']} {entry['x3']}"
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print(f"{sp}{color}{entry['name'].decode()}{COLOR_RESET} [{owner} {attrs} {other_attrs}]")
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for child in entry["children"]:
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print_entry(child, indent + 2)
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def main() -> None:
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parser = argparse.ArgumentParser(description="Prints a FST in a tree-like format.")
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parser.add_argument("file")
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args = parser.parse_args()
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with open(args.file, "rb") as f:
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root = read_entry(f)
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print_entry(root, 0)
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main()
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