add data source for openvt

data/openvt.json

@@ -0,0 +1,10 @@
+{
+  "functions": {
+    "sudo": [
+      {
+        "description": "The command execution is blind (displayed on the virtual console), but it is possible to save the output on a temporary file.",
+        "code": "TF=$(mktemp -u)\nsudo openvt -- sh -c \"[command] >$TF 2>&1\"\ncat $TF\n"
+      }
+    ]
+  }
+}