scripts: add probe_dump.py

scripts/probe_dump.py

+#!/usr/bin/env python3
+#
+# A simple Knot DNS probe client
+#
+
+import argparse
+import libknot
+import libknot.probe
+import sys
+
+
+def probe_loop(args):
+    try:
+        libknot.Knot(args.libknot_path)
+    except:
+        print("Cannot find shared library libknot.so")
+        sys.exit(1)
+
+    probe = libknot.probe.KnotProbe(args.probe_dir, args.channel)
+    data = libknot.probe.KnotProbeDataArray(8)
+
+    try:
+        while (True):
+            if probe.consume(data, 1000) > 0:
+                for item in data:
+                    print(item.str(color=not args.no_color, timestamp=not args.no_timestamp))
+    except KeyboardInterrupt:
+        sys.exit(0)
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(
+        formatter_class = argparse.ArgumentDefaultsHelpFormatter,
+    )
+    parser.add_argument(
+        "--libknot-path",
+        help="path to the libknot shared library"
+    )
+    parser.add_argument(
+        "--probe-dir",
+        default="/run/knot",
+        help="path to the probe directory"
+    )
+    parser.add_argument(
+        "--channel",
+        type=int,
+        default=1,
+        help="the probe channel"
+    )
+    parser.add_argument(
+        "--no-color",
+        action='store_true',
+        help="don't colorize the output"
+    )
+    parser.add_argument(
+        "--no-timestamp",
+        action='store_true',
+        help="don't print the current timestamp"
+    )
+    args = parser.parse_args()
+
+    probe_loop(args)