On subprocess kill write exit code to result to prevent changes (#120)

* fix missed docstring

exec_helpers/async_api/api.py

@@ -75,12 +75,8 @@ async def _exec_command(  # type: ignore
 
         :param command: Command for execution
         :type command: str
-        :param interface: Control interface
-        :type interface: typing.Any
-        :param stdout: STDOUT pipe or file-like object
-        :type stdout: typing.Optional[asyncio.StreamReader]
-        :param stderr: STDERR pipe or file-like object
-        :type stderr: typing.Optional[asyncio.StreamReader]
+        :param async_result: execute_async result
+        :type async_result: ExecuteAsyncResult
         :param timeout: Timeout for command execution
         :type timeout: typing.Union[int, float, None]
         :param verbose: produce verbose log record on command call

exec_helpers/async_api/subprocess_runner.py

@@ -142,6 +142,7 @@ async def poll_stderr() -> None:
             exit_code = await asyncio.wait_for(async_result.interface.wait(), timeout=0.001)
             if exit_code is None:
                 raise exceptions.ExecHelperNoKillError(result=result, timeout=timeout)
+            result.exit_code = exit_code
         finally:
             stdout_task.cancel()
             stderr_task.cancel()

exec_helpers/subprocess_runner.py

@@ -158,6 +158,7 @@ def close_streams() -> None:
             exit_code = async_result.interface.poll()
             if exit_code is None:
                 raise exceptions.ExecHelperNoKillError(result=result, timeout=timeout)
+            result.exit_code = exit_code
         finally:
             stdout_future.cancel()
             stderr_future.cancel()