[pitboss] phase 12: Track B — Python harness emitter shapes

tests/dynamic_fixtures/python/cli/benign.py

@@ -0,0 +1,26 @@
+"""Phase 12 — CLI shape, benign."""
+import re
+import subprocess
+import sys
+
+_VALID_HOST = re.compile(r"^[A-Za-z0-9.-]{1,253}$")
+
+
+def main():
+    host = sys.argv[1] if len(sys.argv) > 1 else ""
+    if not _VALID_HOST.fullmatch(host):
+        print("invalid host")
+        return
+    result = subprocess.run(
+        ["ping", "-c", "1", host],
+        shell=False,
+        capture_output=True,
+        text=True,
+        timeout=5,
+    )
+    print(result.stdout)
+    print(result.stderr, end="")
+
+
+if __name__ == "__main__":
+    main()