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26 lines
537 B
Python
26 lines
537 B
Python
"""Phase 12 — CLI shape, benign."""
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import re
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import subprocess
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import sys
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_VALID_HOST = re.compile(r"^[A-Za-z0-9.-]{1,253}$")
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def main():
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host = sys.argv[1] if len(sys.argv) > 1 else ""
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if not _VALID_HOST.fullmatch(host):
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print("invalid host")
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return
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result = subprocess.run(
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["ping", "-c", "1", host],
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shell=False,
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capture_output=True,
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text=True,
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timeout=5,
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)
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print(result.stdout)
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print(result.stderr, end="")
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if __name__ == "__main__":
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main()
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