enable tun/tap/iptables

hc

2024-05-10 ee930fffee469d076998274a2ca55e13dc1efb67

 kernel/scripts/checkkconfigsymbols.py
..
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@@ -113,7 +113,7 @@
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     return args
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-def main():
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+def print_undefined_symbols():
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     """Main function of this module."""
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     args = parse_options()
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..
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@@ -472,5 +472,16 @@
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     return defined, references
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+def main():
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+    try:
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+        print_undefined_symbols()
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+    except BrokenPipeError:
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+        # Python flushes standard streams on exit; redirect remaining output
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+        # to devnull to avoid another BrokenPipeError at shutdown
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+        devnull = os.open(os.devnull, os.O_WRONLY)
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+        os.dup2(devnull, sys.stdout.fileno())
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+        sys.exit(1)  # Python exits with error code 1 on EPIPE
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+
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+
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 if __name__ == "__main__":
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     main()