update_engine/postinstall_runner_action.h

// Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UPDATE_ENGINE_POSTINSTALL_RUNNER_ACTION_H_
#define UPDATE_ENGINE_POSTINSTALL_RUNNER_ACTION_H_

#include <string>

#include "update_engine/action.h"
#include "update_engine/install_plan.h"

// The Postinstall Runner Action is responsible for running the postinstall
// script of a successfully downloaded update.

namespace chromeos_update_engine {

class PostinstallRunnerAction : public InstallPlanAction {
 public:
  PostinstallRunnerAction()
      : powerwash_marker_created_(false),
        powerwash_marker_file_(nullptr) {}

  void PerformAction();

  // Note that there's no support for terminating this action currently.
  void TerminateProcessing() { CHECK(false); }

  // Debugging/logging
  static std::string StaticType() { return "PostinstallRunnerAction"; }
  std::string Type() const { return StaticType(); }

 private:
  // Subprocess::Exec callback.
  void CompletePostinstall(int return_code);
  static void StaticCompletePostinstall(int return_code,
                                        const std::string& output,
                                        void* p);

  InstallPlan install_plan_;
  std::string temp_rootfs_dir_;

  // True if Powerwash Marker was created before invoking post-install script.
  // False otherwise. Used for cleaning up if post-install fails.
  bool powerwash_marker_created_;

  // Non-null value will cause post-install to override the default marker
  // file name; used for testing.
  const char* powerwash_marker_file_;

  // Special ctor + friend declaration for testing purposes.
  explicit PostinstallRunnerAction(const char* powerwash_marker_file)
      : powerwash_marker_created_(false),
        powerwash_marker_file_(powerwash_marker_file) {}

  friend class PostinstallRunnerActionTest;

  DISALLOW_COPY_AND_ASSIGN(PostinstallRunnerAction);
};

}  // namespace chromeos_update_engine

#endif  // UPDATE_ENGINE_POSTINSTALL_RUNNER_ACTION_H_