## GnomeClient

GnomeClient — Interactions with the session manager.

## Synopsis

    #include <libgnomeui/libgnomeui.h>

    #define     GNOME_CLIENT_CONNECTED          (obj)
    enum        GnomeDialogType;
    enum        GnomeRestartStyle;
    enum        GnomeClientFlags;
    enum        GnomeSaveStyle;
    enum        GnomeInteractStyle;
    void        (*GnomeInteractFunction)        (GnomeClient *client,
                                                 gint key,
                                                 GnomeDialogType dialog_type,
                                                 gpointer data);
    struct      GnomeClient;
    #define     GNOME_CLIENT_PARAM_SM_CONNECT
    GnomeClient* gnome_master_client            (void);
    const gchar* gnome_client_get_config_prefix (GnomeClient *client);
    const gchar* gnome_client_get_global_config_prefix
                                                (GnomeClient *client);
    void        gnome_client_set_global_config_prefix
                                                (GnomeClient *client,
                                                 const gchar *prefix);
    GnomeClientFlags gnome_client_get_flags     (GnomeClient *client);
    void        gnome_client_set_restart_style  (GnomeClient *client,
                                                 GnomeRestartStyle style);
    void        gnome_client_set_priority       (GnomeClient *client,
                                                 guint priority);
    void        gnome_client_set_restart_command
                                                (GnomeClient *client,
                                                 gint argc,
                                                 gchar *argv[]);
    void        gnome_client_add_static_arg     (GnomeClient *client,
                                                 ...);
    void        gnome_client_set_discard_command
                                                (GnomeClient *client,
                                                 gint argc,
                                                 gchar *argv[]);
    void        gnome_client_set_resign_command (GnomeClient *client,
                                                 gint argc,
                                                 gchar *argv[]);
    void        gnome_client_set_shutdown_command
                                                (GnomeClient *client,
                                                 gint argc,
                                                 gchar *argv[]);
    void        gnome_client_set_current_directory
                                                (GnomeClient *client,
                                                 const gchar *dir);
    void        gnome_client_set_environment    (GnomeClient *client,
                                                 const gchar *name,
                                                 const gchar *value);
    void        gnome_client_set_clone_command  (GnomeClient *client,
                                                 gint argc,
                                                 gchar *argv[]);
    void        gnome_client_set_process_id     (GnomeClient *client,
                                                 pid_t pid);
    void        gnome_client_set_program        (GnomeClient *client,
                                                 const gchar *program);
    void        gnome_client_set_user_id        (GnomeClient *client,
                                                 const gchar *id);
    void        gnome_client_save_any_dialog    (GnomeClient *client,
                                                 GtkDialog *dialog);
    void        gnome_client_save_error_dialog  (GnomeClient *client,
                                                 GtkDialog *dialog);
    void        gnome_client_request_phase_2    (GnomeClient *client);
    void        gnome_client_request_save       (GnomeClient *client,
                                                 GnomeSaveStyle save_style,
                                                 gboolean shutdown,
                                                 GnomeInteractStyle interact_style,
                                                 gboolean fast,
                                                 gboolean global);
    void        gnome_client_flush              (GnomeClient *client);
    void        gnome_client_disable_master_connection
                                                (void);
    GnomeClient* gnome_client_new               (void);
    GnomeClient* gnome_client_new_without_connection
                                                (void);
    void        gnome_client_connect            (GnomeClient *client);
    void        gnome_client_disconnect         (GnomeClient *client);
    void        gnome_client_set_id             (GnomeClient *client,
                                                 const gchar *id);
    const gchar* gnome_client_get_id            (GnomeClient *client);
    const gchar* gnome_client_get_previous_id   (GnomeClient *client);
    const gchar* gnome_client_get_desktop_id    (GnomeClient *client);
    void        gnome_client_request_interaction
                                                (GnomeClient *client,
                                                 GnomeDialogType dialog_type,
                                                 GnomeInteractFunction function,
                                                 gpointer data);
    void        gnome_client_request_interaction_interp
                                                (GnomeClient *client,
                                                 GnomeDialogType dialog_type,
                                                 GtkCallbackMarshal function,
                                                 gpointer data,
                                                 GtkDestroyNotify destroy);
    void        gnome_interaction_key_return    (gint key,
                                                 gboolean cancel_shutdown);

## Object Hierarchy

      GObject
       +----GtkObject
             +----GnomeClient

## Signal Prototypes

    "connect"   void        user_function      (GnomeClient *client,
                                                gboolean arg1,
                                                gpointer user_data);
    "die"       void        user_function      (GnomeClient *client,
                                                gpointer user_data);
    "disconnect"
                void        user_function      (GnomeClient *client,
                                                gpointer user_data);
    "save-complete"
                void        user_function      (GnomeClient *client,
                                                gpointer user_data);
    "save-yourself"
                gboolean    user_function      (GnomeClient *client,
                                                gint arg1,
                                                GnomeSaveStyle arg2,
                                                gboolean arg3,
                                                GnomeInteractStyle arg4,
                                                gboolean arg5,
                                                gpointer user_data);
    "shutdown-cancelled"
                void        user_function      (GnomeClient *client,
                                                gpointer user_data);

## Description

## Details

### GNOME_CLIENT_CONNECTED()

    #define GNOME_CLIENT_CONNECTED(obj) (GNOME_CLIENT (obj)->smc_conn)

Determine if the GnomeClient instance has connected to the session manager already.

`obj` : | A GnomeClient instance.
Returns : | `TRUE` if already connected to the session manager, `FALSE` otherwise.

### enum GnomeDialogType

    typedef enum
    {
      GNOME_DIALOG_ERROR,
      GNOME_DIALOG_NORMAL
    } GnomeDialogType;

The dialogs used by the session manager to handler user interactions.

`GNOME_DIALOG_ERROR` | Used when an error has occurred.
`GNOME_DIALOG_NORMAL` | Used for all other (non-error) interactions.

### enum GnomeRestartStyle

    typedef enum
    {
      /* update structure when adding an enum */
      GNOME_RESTART_IF_RUNNING,
      GNOME_RESTART_ANYWAY,
      GNOME_RESTART_IMMEDIATELY,
      GNOME_RESTART_NEVER
    } GnomeRestartStyle;

The various ways in which the session manager can restart a client. Set by calling `gnome_client_set_restart_style()`.

`GNOME_RESTART_IF_RUNNING` | Restart if the client was running when the previous session exited.
`GNOME_RESTART_ANYWAY` | Restart even if the client was exited before the user logged out of the previous session.
`GNOME_RESTART_IMMEDIATELY` | Restart the client immediately whenever it crashes or exits.
`GNOME_RESTART_NEVER` | Do not restart the client.

### enum GnomeClientFlags

    typedef enum
    {
      GNOME_CLIENT_IS_CONNECTED= 1 << 0,
      GNOME_CLIENT_RESTARTED   = 1 << 1,
      GNOME_CLIENT_RESTORED    = 1 << 2
    } GnomeClientFlags;

Flags indicating the status of a client (as seen by the session manager). Used as return values by `gnome_client_get_flags()`.

`GNOME_CLIENT_IS_CONNECTED` | The client is connected to the session manager.
`GNOME_CLIENT_RESTARTED` | The client has been restarted (i.e. it has been running with the same client id previously).
`GNOME_CLIENT_RESTORED` | There may be a configuration file from which the client's state should be restored (applies only to the master client).

### enum GnomeSaveStyle

    typedef enum
    {
      /* update structure when adding an enum */
      GNOME_SAVE_GLOBAL,
      GNOME_SAVE_LOCAL,
      GNOME_SAVE_BOTH
    } GnomeSaveStyle;

Which pieces of data a client should save when receiving a "SaveYourself" call from the session manager.

`GNOME_SAVE_GLOBAL` | Save data (to somewhere persistent) that affects and is visible to all users of this application.
`GNOME_SAVE_LOCAL` | Save data that only applies to this instance of the application.
`GNOME_SAVE_BOTH` | Save both global and local data.

### enum GnomeInteractStyle

    typedef enum
    {
      GNOME_INTERACT_NONE,
      GNOME_INTERACT_ERRORS,
      GNOME_INTERACT_ANY
    } GnomeInteractStyle;

Indicates how a "SaveYourself" command should interact with the user.

`GNOME_INTERACT_NONE` | The client should never interact with the user.
`GNOME_INTERACT_ERRORS` | The client should only interact when there are errors.
`GNOME_INTERACT_ANY` | The client cna interact with the user for any reason.

### GnomeInteractFunction ()

    void        (*GnomeInteractFunction)        (GnomeClient *client,
                                                 gint key,
                                                 GnomeDialogType dialog_type,
                                                 gpointer data);

A function called when the client wishes to interact with the user a the session manager's convenience (usually during shutdown and restarts). All other clients are blocked from interacting with the user until the `key` is released via a call to `gnome_interaction_key_return()`.

Although the function is not obliged to respect the passed in `dialog_type`, it is bad form not to do so.

`client` : | The GnomeClient instance doing the interaction.
`key` : | A unique key.
`dialog_type` : | The GnomeDialogType that should be used to do the interaction.
`data` : | Application specific data that was specified at the time the callback was set up.

### struct GnomeClient

    struct GnomeClient;

A widget representing a client and containing information about the client's interaction with the session manager.

### GNOME_CLIENT_PARAM_SM_CONNECT

    #define GNOME_CLIENT_PARAM_SM_CONNECT "sm-connect"

Passed as a parameter to the application's `gnome_program_init()` call (with a value of `TRUE` or `FALSE`) to indicate whether the application should attempt to connect to the session manager or not. Can be overridden by the user passing `--sm-disable` on the command line and defaults to `TRUE`.

### gnome_master_client ()

    GnomeClient* gnome_master_client            (void);

Get the master session management client. This master client gets a client id, that may be specified by the '--sm-client-id' command line option. A master client will be generated by `gnome_program_init()`. If possible the master client will contact the session manager after command-line parsing is finished (unless `gnome_client_disable_master_connection()` was called). The master client will also set the SM_CLIENT_ID property on the client leader window of your application.

Additionally, the master client gets some static arguments set automatically (see `gnome_client_add_static_arg()` for static arguments): `gnome_program_init()` passes all the command line options which are recognised by gtk as static arguments to the master client.

Returns : | Pointer to the master client

### gnome_client_get_config_prefix ()

    const gchar* gnome_client_get_config_prefix (GnomeClient *client);

Get the config prefix for a client. This config prefix provides a suitable place to store any details about the state of the client which can not be described using the app's command line arguments (as set in the restart command). You may push the returned value using `gnome_config_push_prefix()` and read or write any values you require.

`client` : | Pointer to GNOME session client object.
Returns : | Config prefix. The returned string belongs to libgnomeui library and should NOT be freed by the caller.

### gnome_client_get_global_config_prefix ()

    const gchar* gnome_client_get_global_config_prefix
                                                (GnomeClient *client);

Get the config prefix that will be returned by `gnome_client_get_config_prefix()` for clients which have NOT been restarted or cloned (i.e. for clients started by the user without `--sm-' options). This config prefix may be used to write the user's preferred config for these "new" clients.

You could also use this prefix as a place to store and retrieve config details that you wish to apply to ALL instances of the app. However, this practice limits the users freedom to configure each instance in a different way so it should be used with caution.

`client` : | Pointer to GNOME session client object.
Returns : | The config prefix as a newly allocated string.

### gnome_client_set_global_config_prefix ()

    void        gnome_client_set_global_config_prefix
                                                (GnomeClient *client,
                                                 const gchar *prefix);

Set the value used for the global config prefix. The config prefixes returned by `gnome_client_get_config_prefix()` are formed by extending this prefix with an unique identifier.

The global config prefix defaults to a name based on the name of the executable. This function allows you to set it to a different value. It should be called BEFORE retrieving the config prefix for the first time. Later calls will be ignored.

For example, setting a global config prefix of "/app.d/session/" would ensure that all your session save files or directories would be gathered together into the app.d directory.

`client` : | Pointer to GNOME session client object.
`prefix` : | Prefix for saving the global configuration.

### gnome_client_get_flags ()

    GnomeClientFlags gnome_client_get_flags     (GnomeClient *client);

Determine the client's status with the session manager.,

`client` : | Pointer to GNOME session client object.
Returns : | Various GnomeClientFlag flags which have been or'd together.

### gnome_client_set_restart_style ()

    void        gnome_client_set_restart_style  (GnomeClient *client,
                                                 GnomeRestartStyle style);

Tells the session manager how the client should be restarted in future session. The options are given by the GnomeRestartStyle enum.

`client` : | Pointer to GNOME session client object.
`style` : | When to restart the client.

### gnome_client_set_priority ()

    void        gnome_client_set_priority       (GnomeClient *client,
                                                 guint priority);

The gnome-session manager restarts clients in order of their priorities in a similar way to the start up ordering in SysV. This function allows the app to suggest a position in this ordering. The value should be between 0 and 99. A default value of 50 is assigned to apps that do not provide a value. The user may assign a different priority.

`client` : | Pointer to GNOME session client object.
`priority` : | Position of client in session start up ordering.

### gnome_client_set_restart_command ()

    void        gnome_client_set_restart_command
                                                (GnomeClient *client,
                                                 gint argc,
                                                 gchar *argv[]);

When clients crash or the user logs out and back in, they are restarted. This command should perform the restart. Executing the restart command on the local host should reproduce the state of the client at the time of the session save as closely as possible. Saving config info under the `gnome_client_get_config_prefix()` is generally useful.

`client` : | Pointer to GNOME session client object.
`argc` : | Number of strings in argv.
`argv` : | Argument vector to an `execv()` to restart the client.

### gnome_client_add_static_arg ()

    void        gnome_client_add_static_arg     (GnomeClient *client,
                                                 ...);

You can add arguments to your restart command's argv with this function. This function provides an alternative way of adding new arguments to the restart command. The arguments are placed before the arguments specified by `gnome_client_set_restart_command()` and after the arguments recognised by GTK+ that are specified by the user on the original command line.

`client` : | Pointer to GNOME session client object.
`...` : | `NULL`-terminated list of arguments to add to the restart command.

### gnome_client_set_discard_command ()

    void        gnome_client_set_discard_command
                                                (GnomeClient *client,
                                                 gint argc,
                                                 gchar *argv[]);

Provides a command to run when a client is removed from the session. It might delete session-specific config files for example. Executing the discard command on the local host should delete the information saved as part of the session save that was in progress when the discard command was set. For example:

Example 1. Setting up a client's discard command

    gchar *prefix = gnome_client_get_config_prefix (client);
    gchar *argv[] = { "rm", "-r", NULL };
    argv[2] = gnome_config_get_real_path (prefix);
    gnome_client_set_discard_command (client, 3, argv);

`client` : | The GnomeClient of interest.
`argc` : | Number of strings in `argv`.
`argv` : | Vector of strings such as those passed to `exev()`.

### gnome_client_set_resign_command ()

    void        gnome_client_set_resign_command (GnomeClient *client,
                                                 gint argc,
                                                 gchar *argv[]);

Some clients can be "undone," removing their effects and deleting any saved state. For example, xmodmap could register a resign command to undo the keymap changes it saved.

Used by clients that use the GNOME_RESTART_ANYWAY restart style to to undo their effects (these clients usually perform initialisation functions and leave effects behind after they die). The resign command combines the effects of a shutdown command and a discard command. It is executed when the user decides that the client should cease to be restarted.

`client` : | Pointer to GNOME session client object.
`argc` : | Number of strings in `argv`.
`argv` : | `execv()`-style command to undo the effects of the client.

### gnome_client_set_shutdown_command ()

    void        gnome_client_set_shutdown_command
                                                (GnomeClient *client,
                                                 gint argc,
                                                 gchar *argv[]);

GNOME_RESTART_ANYWAY clients can set this command to run when the user logs out but the client is no longer running.

Used by clients that use the GNOME_RESTART_ANYWAY restart style to to undo their effects (these clients usually perform initialisation functions and leave effects behind after they die). The shutdown command simply undoes the effects of the client. It is executed during a normal logout.

`client` : | Pointer to GNOME session client object.
`argc` : | Number of strings in argv.
`argv` : | Command to shutdown the client if the client isn't running.

### gnome_client_set_current_directory ()

    void        gnome_client_set_current_directory
                                                (GnomeClient *client,
                                                 const gchar *dir);

Set the directory to be in when running shutdown, discard, restart, etc. commands.

`client` : | Pointer to GNOME session client object.
`dir` : | Directory path.

### gnome_client_set_environment ()

    void        gnome_client_set_environment    (GnomeClient *client,
                                                 const gchar *name,
                                                 const gchar *value);

Set an environment variable to be placed in the client's environment prior to running restart, shutdown, discard, etc. commands.

`client` : | Pointer to GNOME session client object.
`name` : | Name of the environment variable
`value` : | Value of the environment variable

### gnome_client_set_clone_command ()

    void        gnome_client_set_clone_command  (GnomeClient *client,
                                                 gint argc,
                                                 gchar *argv[]);

Set a command the session manager can use to create a new instance of the application.

`client` : | Pointer to GNOME session client object.
`argc` : | Number of strings in the `argv` vector.
`argv` : | Argument strings, suitable for use with `execv()`.

### gnome_client_set_process_id ()

    void        gnome_client_set_process_id     (GnomeClient *client,
                                                 pid_t pid);

The client should tell the session manager the result of `getpid()`. However, GNOME does this automatically; so you do not need this function.

`client` : | Pointer to GNOME session client object.
`pid` : | PID to set as the client's PID.

### gnome_client_set_program ()

    void        gnome_client_set_program        (GnomeClient *client,
                                                 const gchar *program);

Used to tell the session manager the name of your program. Set automatically; this function isn't needed.

`client` : | Pointer to GNOME session client object.
`program` : | Name of the program.

### gnome_client_set_user_id ()

    void        gnome_client_set_user_id        (GnomeClient *client,
                                                 const gchar *id);

Tell the session manager the user's login name. GNOME does this automatically; no need to call the function.

`client` : | Pointer to GNOME session client object.
`id` : | Username.

### gnome_client_save_any_dialog ()

    void        gnome_client_save_any_dialog    (GnomeClient *client,
                                                 GtkDialog *dialog);

May be called during a "save_youself" handler to request that a (modal) dialog is presented to the user. The session manager decides when the dialog is shown, but it will not be shown it unless the session manager is sending an interaction style of GNOME_INTERACT_ANY. "Cancel" and "Log out" buttons will be added during a shutdown.

`client` : | Pointer to GnomeClient object.
`dialog` : | Pointer to GNOME dialog widget (a GtkDialog widget).

### gnome_client_save_error_dialog ()

    void        gnome_client_save_error_dialog  (GnomeClient *client,
                                                 GtkDialog *dialog);

May be called during a "save_youself" handler when an error has occured during the save. The session manager decides when the dialog is shown, but it will not be shown it unless the session manager is sending an interaction style of GNOME_INTERACT_ANY. "Cancel" and "Log out" buttons will be added during a shutdown.

`client` : | Pointer to GnomeClient object.
`dialog` : | Pointer to GNOME dialog widget (a GtkDialog widget).

### gnome_client_request_phase_2 ()

    void        gnome_client_request_phase_2    (GnomeClient *client);

Request the session managaer to emit the "save_yourself" signal for a second time after all the clients in the session have ceased interacting with the user and entered an idle state. This might be useful if your app manages other apps and requires that they are in an idle state before saving its final data.

`client` : | A GnomeClient object.

### gnome_client_request_save ()

    void        gnome_client_request_save       (GnomeClient *client,
                                                 GnomeSaveStyle save_style,
                                                 gboolean shutdown,
                                                 GnomeInteractStyle interact_style,
                                                 gboolean fast,
                                                 gboolean global);

Request the session manager to save the session in some way. The arguments correspond with the arguments passed to the "save_yourself" signal handler.

The save_style indicates whether the save should affect data accessible to other users (GNOME_SAVE_GLOBAL) or only the state visible to the current user (GNOME_SAVE_LOCAL) or both. Setting shutdown to `TRUE` will initiate a logout. The interact_style specifies which kinds of interaction will be available. Setting fast to `TRUE` will limit the save to setting the session manager properties plus any essential data. Setting the value of global to `TRUE` will request that all the other apps in the session do a save as well. A global save is mandatory when doing a shutdown.

`client` : | Pointer to GNOME session client object.
`save_style` : | Save style to request.
`shutdown` : | Whether to log out of the session.
`interact_style` : | Whether to allow user interaction.
`fast` : | Minimize activity to save as soon as possible.
`global` : | Request that all other apps in the session also save their state.

### gnome_client_flush ()

    void        gnome_client_flush              (GnomeClient *client);

This will force the underlying connection to the session manager to be flushed. This is useful if you have some pending changes that you want to make sure get committed.

`client` : | A GnomeClient instance.

### gnome_client_disable_master_connection ()

    void        gnome_client_disable_master_connection
                                                (void);

### Warning

`gnome_client_disable_master_connection` is deprecated and should not be used in newly-written code.

Don't connect the master client to the session manager. Usually invoked by users when they pass the --sm-disable argument to a Gnome application.

### gnome_client_new ()

    GnomeClient* gnome_client_new               (void);

Allocates memory for a new GNOME session management client object. After allocating, the client tries to connect to a session manager. You probably want to use `gnome_master_client()` instead.

Returns : | Pointer to a newly allocated GNOME session management client object.

### gnome_client_new_without_connection ()

    GnomeClient* gnome_client_new_without_connection
                                                (void);

Allocates memory for a new GNOME session management client object. You probably want to use `gnome_master_client()` instead.

Returns : | Pointer to a newly allocated GNOME session management client object.

### gnome_client_connect ()

    void        gnome_client_connect            (GnomeClient *client);

Causes the client to connect to the session manager. Usually happens automatically; no need to call this function.

`client` : | A GnomeClient instance.

### gnome_client_disconnect ()

    void        gnome_client_disconnect         (GnomeClient *client);

Disconnect the client from the session manager.

`client` : | A GnomeClient instance.

### gnome_client_set_id ()

    void        gnome_client_set_id             (GnomeClient *client,
                                                 const gchar *id);

Set the client's session management ID; must be done before connecting to the session manager. There is usually no reason to call this function.

`client` : | A GnomeClient instance.
`id` : | Session management ID.

### gnome_client_get_id ()

    const gchar* gnome_client_get_id            (GnomeClient *client);

Returns session management ID

`client` : | A GnomeClient instance.
Returns : | Session management ID for this client; `NULL` if not connected to a session manager.

### gnome_client_get_previous_id ()

    const gchar* gnome_client_get_previous_id   (GnomeClient *client);

Get the session management ID from the previous session.

`client` : | A GnomeClient instance.
Returns : | Pointer to the session management ID the client had in the last session, or `NULL` if it was not in a previous session.

### gnome_client_get_desktop_id ()

    const gchar* gnome_client_get_desktop_id    (GnomeClient *client);

Get the client ID of the desktop's current instance, i.e. if you consider the desktop as a whole as a session managed app, this returns its session ID using a GNOME extension to session management. May return `NULL` for apps not running under a recent version of gnome-session; apps should handle that case.

`client` : | A GnomeClient instance.
Returns : | Session ID of GNOME desktop instance, or `NULL` if none.

### gnome_client_request_interaction ()

    void        gnome_client_request_interaction
                                                (GnomeClient *client,
                                                 GnomeDialogType dialog_type,
                                                 GnomeInteractFunction function,
                                                 gpointer data);

Use the following functions, if you want to interact with the user during a "save_yourself" handler without being restricted to using the dialog based commands `gnome_client_save_any_dialog()` or `gnome_client_save_error_dialog()`. Note, however, that overriding the session manager specified preference in this way (by using arbitrary dialog boxes) is not very nice.

If and when the session manager decides that it's the app's turn to interact then 'func' will be called with the specified arguments and a unique 'GnomeInteractionKey'. The session manager will block other clients from interacting until this key is returned with `gnome_interaction_key_return()`.

`client` : | A GnomeClient object.
`dialog_type` : | The type of dialog to create.
`function` : | Callback to invoke to perform the interaction.
`data` : | Callback data.

### gnome_client_request_interaction_interp ()

    void        gnome_client_request_interaction_interp
                                                (GnomeClient *client,
                                                 GnomeDialogType dialog_type,
                                                 GtkCallbackMarshal function,
                                                 gpointer data,
                                                 GtkDestroyNotify destroy);

Similar to `gnome_client_request_interaction()`, but used when you need to destroy the callback data after the interaction.

`client` : | Pointer to GNOME session client object.
`dialog_type` : | Type of dialog to show.
`function` : | Callback to perform the interaction (a GnomeInteractFunction).
`data` : | Callback data.
`destroy` : | Function to destroy callback data.

### gnome_interaction_key_return ()

    void        gnome_interaction_key_return    (gint key,
                                                 gboolean cancel_shutdown);

Used in interaction callback to tell the session manager you are done interacting.

`key` : | Key passed to interaction callback
`cancel_shutdown` : | If `TRUE`, cancel the shutdown

## Signals

### The "connect" signal

    void        user_function                  (GnomeClient *client,
                                                gboolean arg1,
                                                gpointer user_data);

Called once the client has been connected to the signal manager.

`client` : | the object which received the signal.
`arg1` : | `TRUE` if the application has been restarted.
`user_data` : | user data set when the signal handler was connected.

### The "die" signal

    void        user_function                  (GnomeClient *client,
                                                gpointer user_data);

Called when the session manager wants the client to shut down.

`client` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.

### The "disconnect" signal

    void        user_function                  (GnomeClient *client,
                                                gpointer user_data);

Called when the client is disconnected from the session manager.

`client` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.

### The "save-complete" signal

    void        user_function                  (GnomeClient *client,
                                                gpointer user_data);

Called when the session manager has finished checkpointing all of the clients. Clients are then free to change their state.

`client` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.

### The "save-yourself" signal

    gboolean    user_function                  (GnomeClient *client,
                                                gint arg1,
                                                GnomeSaveStyle arg2,
                                                gboolean arg3,
                                                GnomeInteractStyle arg4,
                                                gboolean arg5,
                                                gpointer user_data);

Called when either a "SaveYourself" or a "SaveYourselfPhase2" call is made by the session manager.

`client` : | the object which received the signal.
`arg1` : | The phase of the "SaveYourself" command ('1' or '2').
`arg2` : | The data which should be saved by the client (local, global or both).
`arg3` : | `TRUE` if the session manager is shutting down.
`arg4` : | How the client is allowed to interact with the user while saving.
`arg5` : | `TRUE` if this is to be a "fast" shutdown (saving minimal data).
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` if the "SaveYourself" was completed succesfully, `FALSE` otherwise.

### The "shutdown-cancelled" signal

    void        user_function                  (GnomeClient *client,
                                                gpointer user_data);

Called if the session manager had sent a "SaveYourself" to all clients in preparation for shutting down and the shutdown was then cancelled. A client can then continue running and change its state.

`client` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.