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diff --git a/kmail/kmfoldermbox.h b/kmail/kmfoldermbox.h
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+/*
+ * kmail: KDE mail client
+ * Copyright (c) 1996-1998 Stefan Taferner <taferner@kde.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+#ifndef kmfoldermbox_h
+#define kmfoldermbox_h
+
+#include "kmfolderindex.h"
+#include "mboxjob.h"
+
+#include <sys/types.h> // for size_t
+
+namespace KMail {
+  class FolderJob;
+  class MboxJob;
+  class AttachmentStrategy;
+}
+using KMail::FolderJob;
+using KMail::MboxJob;
+using KMail::AttachmentStrategy;
+
+/* Mail folder.
+ * (description will be here).
+ *
+ * Accounts:
+ *   The accounts (of KMail) that are fed into the folder are
+ *   represented as the children of the folder. They are only stored here
+ *   during runtime to have a reference for which accounts point to a
+ *   specific folder.
+ */
+
+class KMFolderMbox : public KMFolderIndex
+{
+  Q_OBJECT
+  friend class ::KMail::MboxJob;
+public:
+
+
+  /** Usually a parent is given. But in some cases there is no
+    fitting parent object available. Then the name of the folder
+    is used as the absolute path to the folder file. */
+  KMFolderMbox(KMFolder* folder, const char* name=0);
+  virtual ~KMFolderMbox();
+
+  /** Returns the type of this folder */
+  virtual KMFolderType folderType() const { return KMFolderTypeMbox; }
+
+  /** Read a message and return it as a string */
+  DwString getDwString(int idx);
+
+  /** Add the given message to the folder. Usually the message
+    is added at the end of the folder. Returns zero on success and
+    an errno error code on failure. The index of the new message
+    is stored in index_return if given.
+    Please note that the message is added as is to the folder and the folder
+    takes ownership of the message (deleting it in the destructor).*/
+  virtual int addMsg( KMMessage* msg, int* index_return = 0 );
+
+  /** Open folder for access.
+    Does nothing if the folder is already opened. To reopen a folder
+    call close() first.
+    Returns zero on success and an error code equal to the c-library
+    fopen call otherwise (errno). */
+  virtual int open(const char *owner);
+
+  /** @reimpl */
+  virtual void reallyDoClose(const char *owner);
+
+  virtual int canAccess();
+
+  /** fsync buffers to disk */
+  virtual void sync();
+
+  /** @reimpl */
+  virtual int create();
+
+  /** Remove deleted messages from the folder. Returns zero on success
+    and an errno on failure. */
+  virtual int compact( bool silent );
+
+  /** Remove some deleted messages from the folder. Returns zero on success
+    and an errno on failure. This is only for use from MboxCompactionJob. */
+  int compact( unsigned int startIndex, int nbMessages, FILE* tmpFile, off_t& offs, bool& done );
+
+  /** Is the folder read-only? */
+  virtual bool isReadOnly() const { return mReadOnly; }
+
+  /** Is the folder locked? */
+  bool isLocked() const { return mFilesLocked; }
+
+  void setLockType( LockType ltype=FCNTL );
+
+  void setProcmailLockFileName( const QString& );
+
+  static QByteArray escapeFrom( const DwString & str );
+
+  virtual IndexStatus indexStatus();
+
+  /**  reimp */
+  virtual Q_INT64 doFolderSize() const;
+
+protected:
+  virtual FolderJob* doCreateJob( KMMessage *msg, FolderJob::JobType jt, KMFolder *folder,
+                                  QString partSpecifier, const AttachmentStrategy *as ) const;
+  virtual FolderJob* doCreateJob( QPtrList<KMMessage>& msgList, const QString& sets,
+                                  FolderJob::JobType jt, KMFolder *folder ) const;
+  /** Load message from file and store it at given index. Returns 0
+    on failure. */
+  virtual KMMessage* readMsg(int idx);
+
+  /** Create index file from messages file and fill the message-info list
+      mMsgList. Returns 0 on success and an errno value (see fopen) on
+      failure. */
+  virtual int createIndexFromContents();
+
+  /** Lock mail folder files. Called by ::open(). Returns 0 on success and
+    an errno error code on failure. */
+  virtual int lock();
+
+  /** Unlock mail folder files. Called by ::close().  Returns 0 on success
+    and an errno error code on failure. */
+  virtual int unlock();
+
+  /** Called by KMFolder::remove() to delete the actual contents.
+    At the time of the call the folder has already been closed, and
+    the various index files deleted.  Returns 0 on success. */
+  virtual int removeContents();
+
+  /** Called by KMFolder::expunge() to delete the actual contents.
+    At the time of the call the folder has already been closed, and
+    the various index files deleted.  Returns 0 on success. */
+  virtual int expungeContents();
+
+private:
+  FILE *mStream;
+  bool mFilesLocked; // TRUE if the files of the folder are locked (writable)
+  bool mReadOnly; // true if locking failed
+  LockType mLockType;
+  QString mProcmailLockFileName;
+};
+
+#endif // kmfoldermbox_h