Init some class..

duetector/tracers/base.py

@@ -309,4 +309,27 @@ def set_callback(self, host, callback: Callable[[NamedTuple], None]):
 
 
 class SubprocessTracer(Tracer):
-    pass
+    default_config = {
+        **Tracer.default_config,
+    }
+    """
+    Default config for this tracer.
+    """
+
+    executable_: List[str]
+    """
+    shell command
+    """
+
+    sudo: bool = False
+    """
+    If use sudo to run this command
+    """
+
+    preserve_env: bool = False
+    """
+    If preserve env for this command
+    """
+
+    def __init__(self, config: Optional[Union[Config, Dict[str, Any]]] = None, *args, **kwargs):
+        super().__init__(config, *args, **kwargs)

duetector/tracers/subprocess/dummy.py

@@ -0,0 +1,11 @@
+from duetector.tracers.base import SubprocessTracer
+
+
+class DummySpTracer(SubprocessTracer):
+    default_config = {
+        **SubprocessTracer.default_config,
+        "disabled": True,
+    }
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)

duetector/tracers/subprocess/dummy_process.py

@@ -0,0 +1,23 @@
+#!/usr/bin/env python
+
+# TODO: Implement a dummy process that can be used to test the tracer
+
+
+def start():
+    pass
+
+
+def do_something():
+    pass
+
+
+def stop():
+    pass
+
+
+def main():
+    pass
+
+
+if __name__ == "__main__":
+    main()