1 files changed, 48 insertions, 0 deletions
diff --git a/toolkit/mozapps/update/updater/automounter_gonk.h b/toolkit/mozapps/update/updater/automounter_gonk.h
new file mode 100644
index 000000000..e40cacbc2
--- /dev/null
+++ b/toolkit/mozapps/update/updater/automounter_gonk.h
@@ -0,0 +1,48 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* 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 AUTOMOUNTER_GONK_H__
+#define AUTOMOUNTER_GONK_H__
+
+typedef enum {
+  ReadOnly,
+  ReadWrite,
+  Unknown
+} MountAccess;
+
+/**
+ * This class will remount the /system partition as read-write in Gonk to allow
+ * the updater write access. Upon destruction, /system will be remounted back to
+ * read-only. If something causes /system to remain read-write, this class will
+ * reboot the device and allow the system to mount as read-only.
+ *
+ * Code inspired from AOSP system/core/adb/remount_service.c
+ */
+class GonkAutoMounter
+{
+public:
+  GonkAutoMounter();
+  ~GonkAutoMounter();
+
+  MountAccess GetAccess() const
+  {
+    return mAccess;
+  }
+
+private:
+  bool RemountSystem(MountAccess access);
+  bool ForceRemountReadOnly();
+  bool UpdateMountStatus();
+  bool ProcessMount(const char *mount);
+  bool MountSystem(unsigned long flags);
+  void Reboot();
+
+private:
+  char *mDevice;
+  MountAccess mAccess;
+};
+
+#endif // AUTOMOUNTER_GONK_H__