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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_BackgroundTasks_h
#define mozilla_BackgroundTasks_h
#include "nsCOMPtr.h"
#include "nsIBackgroundTasks.h"
#include "nsISupports.h"
#include "nsString.h"
#include "mozilla/Logging.h"
#include "mozilla/Maybe.h"
#include "mozilla/StaticPtr.h"
class nsICommandLine;
class nsIFile;
namespace mozilla {
class BackgroundTasks final : public nsIBackgroundTasks {
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIBACKGROUNDTASKS
public:
explicit BackgroundTasks(Maybe<nsCString> aBackgroundTask);
static void Init(Maybe<nsCString> aBackgroundTask);
static void Shutdown();
/**
* Return a raw pointer to the singleton instance. Use this accessor in C++
* code that just wants to call a method on the instance, but does not need to
* hold a reference.
*/
static BackgroundTasks* GetSingleton();
/**
* Return an addRef'd pointer to the singleton instance. This is used by the
* XPCOM constructor that exists to support usage from JS.
*/
static already_AddRefed<BackgroundTasks> GetSingletonAddRefed();
static Maybe<nsCString> GetBackgroundTasks();
static bool IsBackgroundTaskMode();
static nsresult CreateEphemeralProfileDirectory(
nsIFile* aRootDir, const nsCString& aProfilePrefix, nsIFile** aFile);
static nsresult CreateNonEphemeralProfileDirectory(
nsIFile* aRootDir, const nsCString& aProfilePrefix, nsIFile** aFile);
static bool IsEphemeralProfile();
static nsresult RunBackgroundTask(nsICommandLine* aCmdLine);
/**
* Whether the given task name should process updates. Most tasks should not
* process updates to avoid Firefox being updated unexpectedly.
*
* At the time of writing, we only process updates for the `backgroundupdate`
* task and the test-only `shouldprocessupdates` task.
*/
static bool IsUpdatingTaskName(const nsCString& aName);
/**
* Whether the given task name should use a temporary ephemeral
* profile. Most tasks should use a temporary ephemeral profile to
* allow concurrent task invocation and to simplify reasoning.
*
* At the time of writing, we use temporary ephemeral profiles for all tasks
* save the `backgroundupdate` task and the test-only `notephemeralprofile`
* task.
*/
static bool IsEphemeralProfileTaskName(const nsCString& aName);
/**
* Whether the given task name should produce no output. This is achieved by
* redirecting stdout and stderr to /dev/null (or, on Windows, nul:).
* profile. Most tasks should produce output.
*
* At the time of writing, we produce no output for the `pingsender` task and
* the test-only `no_output` task.
*/
static bool IsNoOutputTaskName(const nsCString& aName);
/**
* Get the installation-specific profile prefix for the current task name and
* the given install hash.
*/
static nsCString GetProfilePrefix(const nsCString& aInstallHash);
protected:
static StaticRefPtr<BackgroundTasks> sSingleton;
static LazyLogModule sBackgroundTasksLog;
Maybe<nsCString> mBackgroundTask;
bool mIsEphemeralProfile;
nsCOMPtr<nsIFile> mProfD;
nsresult CreateEphemeralProfileDirectoryImpl(nsIFile* aRootDir,
const nsCString& aProfilePrefix,
nsIFile** aFile);
nsresult CreateNonEphemeralProfileDirectoryImpl(
nsIFile* aRootDir, const nsCString& aProfilePrefix, nsIFile** aFile);
/*
* Iterates children of `aRoot` and removes unlocked profiles matching
* `aPrefix`.
*/
static nsresult RemoveStaleEphemeralProfileDirectories(
nsIFile* const aRoot, const nsCString& aPrefix);
virtual ~BackgroundTasks() = default;
};
} // namespace mozilla
#endif // mozilla_BackgroundTasks_h
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