1 files changed, 63 insertions, 0 deletions
diff --git a/dom/system/gonk/OpenFileFinder.h b/dom/system/gonk/OpenFileFinder.h
new file mode 100644
index 000000000..24517965a
--- /dev/null
+++ b/dom/system/gonk/OpenFileFinder.h
@@ -0,0 +1,63 @@
+/* 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_system_openfilefinder_h__
+#define mozilla_system_openfilefinder_h__
+
+#include "nsString.h"
+
+#include <dirent.h>
+
+namespace mozilla {
+namespace system {
+
+class OpenFileFinder
+{
+public:
+  enum State
+  {
+    NEXT_PID,
+    CHECK_FDS,
+    DONE
+  };
+  class Info
+  {
+  public:
+    nsCString mFileName;  // name of the the open file
+    nsCString mAppName;   // App which has the file open (if it's a b2g app)
+    pid_t     mPid;       // pid of the process which has the file open
+    nsCString mComm;      // comm associated with pid
+    nsCString mExe;       // executable name associated with pid
+    bool      mIsB2gOrDescendant; // this is b2g/its descendant or not
+  };
+
+  OpenFileFinder(const nsACString& aPath, bool aCheckIsB2gOrDescendant = true);
+  ~OpenFileFinder();
+
+  bool First(Info* aInfo);  // Return the first open file
+  bool Next(Info* aInfo);   // Return the next open file
+  void Close();
+
+private:
+
+  void FillInfo(Info *aInfo, const nsACString& aPath);
+  bool ReadSymLink(const nsACString& aSymLink, nsACString& aOutPath);
+  bool PathMatches(const nsACString& aPath)
+  {
+    return Substring(aPath, 0, mPath.Length()).Equals(mPath);
+  }
+
+  State     mState;   // Keeps track of what we're doing.
+  nsCString mPath;    // Only report files contained within this directory tree
+  DIR*      mProcDir; // Used for scanning /proc
+  DIR*      mFdDir;   // Used for scanning /proc/PID/fd
+  int       mPid;     // PID currently being processed
+  pid_t     mMyPid;   // PID of parent process, we assume we're running on it.
+  bool      mCheckIsB2gOrDescendant; // Do we care about non-b2g process?
+};
+
+} // system
+} // mozilla
+
+#endif  // mozilla_system_nsvolume_h__