This is an implementation of two WL items:

- WL#3158: IM: Instance configuration extensions;
  - WL#3159: IM: --bootstrap and --start-default-instance modes

The following new statements have been added:
  - CREATE INSTANCE;
  - DROP INSTANCE;

The behaviour of the following statements have been changed:
  - SET;
  - UNSET;
  - FLUSH INSTANCES;
  - SHOW INSTANCES;
  - SHOW INSTANCE OPTIONS;

server-tools/instance-manager/user_management_commands.h

@@ -0,0 +1,167 @@
+#ifndef INCLUDES_MYSQL_INSTANCE_MANAGER_USER_MANAGEMENT_CMD_H
+#define INCLUDES_MYSQL_INSTANCE_MANAGER_USER_MANAGEMENT_CMD_H
+
+/*
+   Copyright (C) 2006 MySQL AB
+
+   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+/*
+  This header contains declarations of classes inteded to support
+  user-management commands (such as add user, get list of users, etc).
+
+  The general idea is to have one interface (pure abstract class) for such a
+  command. Each concrete user-management command is implemented in concrete
+  class, derived from the common interface.
+*/
+
+#if defined(__GNUC__) && defined(USE_PRAGMA_INTERFACE)
+#pragma interface
+#endif
+
+/*************************************************************************
+  User_management_cmd -- base class for User-management commands.
+*************************************************************************/
+
+class User_management_cmd
+{
+public:
+  User_management_cmd()
+  { }
+
+  virtual ~User_management_cmd()
+  { }
+
+public:
+  /*
+    Executes user-management command.
+
+    SYNOPSYS
+      execute()
+
+    RETURN
+      See exit_codes.h for possible values.
+  */
+
+  virtual int execute() = 0;
+};
+
+
+/*************************************************************************
+  Passwd_cmd: support for --passwd command-line option.
+*************************************************************************/
+
+class Passwd_cmd : public User_management_cmd
+{
+public:
+  Passwd_cmd()
+  { }
+
+public:
+  virtual int execute();
+};
+
+
+/*************************************************************************
+  Add_user_cmd: support for --add-user command-line option.
+*************************************************************************/
+
+class Add_user_cmd : public User_management_cmd
+{
+public:
+  Add_user_cmd()
+  { }
+
+public:
+  virtual int execute();
+};
+
+
+/*************************************************************************
+  Drop_user_cmd: support for --drop-user command-line option.
+*************************************************************************/
+
+class Drop_user_cmd : public User_management_cmd
+{
+public:
+  Drop_user_cmd()
+  { }
+
+public:
+  virtual int execute();
+};
+
+
+/*************************************************************************
+  Edit_user_cmd: support for --edit-user command-line option.
+*************************************************************************/
+
+class Edit_user_cmd : public User_management_cmd
+{
+public:
+  Edit_user_cmd()
+  { }
+
+public:
+  virtual int execute();
+};
+
+
+/*************************************************************************
+  Clean_db_cmd: support for --clean-db command-line option.
+*************************************************************************/
+
+class Clean_db_cmd : public User_management_cmd
+{
+public:
+  Clean_db_cmd()
+  { }
+
+public:
+  virtual int execute();
+};
+
+
+/*************************************************************************
+  Check_db_cmd: support for --check-db command-line option.
+*************************************************************************/
+
+class Check_db_cmd : public User_management_cmd
+{
+public:
+  Check_db_cmd()
+  { }
+
+public:
+  virtual int execute();
+};
+
+
+/*************************************************************************
+  List_users_cmd: support for --list-users command-line option.
+*************************************************************************/
+
+class List_users_cmd : public User_management_cmd
+{
+public:
+  List_users_cmd()
+  { }
+
+public:
+  virtual int execute();
+};
+
+#endif // INCLUDES_MYSQL_INSTANCE_MANAGER_USER_MANAGEMENT_CMD_H