import json, sys

tool_input = json.loads(sys.stdin.read())
command = tool_input.get("tool_input", {}).get("command", "")

BLOCKED = ["rm -rf /", "dd if=", "mkfs", ":(){:|:&};:"]
for blocked in BLOCKED:
    if blocked in command:
        print(f"BLOCKED: Gefährlicher Befehl erkannt: {blocked}", file=sys.stderr)
        sys.exit(2)  # Exit-Code 2 = Operation blockiert

sys.exit(0)