daemon: Add an interface for communicating with GDM via D-Bus

One goal for GNOME 3.6, is to replace the screen locking functionality
provided by gnome-screensaver with redesigned functionality provided
by gnome-shell.

At the same time, it makes sense to consolidate the yucky PAM
authentication code to one place (GDM).

Right now only greeters can talk to GDM.  At the time the greeter is
started, the slave sets up a private communication channel which the
greeter then connects to for initiating communication.

This commit adds a new method to the org.gnome.DisplayManager.Manager
interface that allows opening a private connection to the slave that
is associated with the currently running session.  That slave exports
the session object over the bus that greeters can interact with the
session as appropriate.  This interface replaces the
GDM_GREETER_DBUS_ADDRESS environment variable that used to to be used
for connecting the greeter to the slave.

This commit also drops gdm-greeter-server and gdm-chooser-server which
don't fit the new model, and are really just thin middle men that don't do
anything important.

Furthermore, this commit splits GdmSession interfaces 3 orthogonal parts
up into 3 separate interfaces on the session object.

A future commit will make this interface work for screensavers/reauthentication.

Based on work by Giovanni Campagna <gcampagna@src.gnome.org>

https://bugzilla.gnome.org/show_bug.cgi?id=676381

1 files changed, 27 insertions, 50 deletions

diff --git a/daemon/gdm-session.h b/daemon/gdm-session.h
index 2810c89b..ad5f8852 100644
--- a/daemon/gdm-session.h
+++ b/daemon/gdm-session.h
@@ -34,6 +34,12 @@ G_BEGIN_DECLS
 
 typedef struct _GdmSessionPrivate GdmSessionPrivate;
 
+typedef enum
+{
+        GDM_SESSION_VERIFICATION_MODE_LOGIN,
+        GDM_SESSION_VERIFICATION_MODE_CHOOSER
+} GdmSessionVerificationMode;
+
 typedef struct
 {
         GObject            parent;
@@ -45,49 +51,20 @@ typedef struct
         GObjectClass parent_class;
 
         /* Signals */
-        void (* setup_complete)              (GdmSession   *session,
-                                              const char   *service_name);
-        void (* setup_failed)                (GdmSession   *session,
-                                              const char   *service_name,
-                                              const char   *message);
-        void (* reset_complete)              (GdmSession   *session);
-        void (* reset_failed)                (GdmSession   *session,
-                                              const char   *message);
-        void (* authenticated)               (GdmSession   *session,
-                                              const char   *service_name);
-        void (* authentication_failed)       (GdmSession   *session,
-                                              const char   *service_name,
-                                              const char   *message);
-        void (* authorized)                  (GdmSession   *session,
-                                              const char   *service_name);
-        void (* authorization_failed)        (GdmSession   *session,
-                                              const char   *service_name,
-                                              const char   *message);
-        void (* accredited)                  (GdmSession   *session,
-                                              const char   *service_name);
-        void (* accreditation_failed)        (GdmSession   *session,
-                                              const char   *service_name,
-                                              const char   *message);
-
-        void (* info_query)                  (GdmSession   *session,
-                                              const char   *service_name,
-                                              const char   *query_text);
-        void (* secret_info_query)           (GdmSession   *session,
-                                              const char   *service_name,
-                                              const char   *query_text);
-        void (* info)                        (GdmSession   *session,
-                                              const char   *service_name,
-                                              const char   *info);
-        void (* problem)                     (GdmSession   *session,
-                                              const char   *service_name,
-                                              const char   *problem);
+        void (* client_ready_for_session_to_start) (GdmSession   *session,
+                                                    const char   *service_name,
+                                                    gboolean      client_is_ready);
+
+        void (* cancelled)                   (GdmSession   *session);
+        void (* client_connected)            (GdmSession   *session);
+        void (* client_disconnected)         (GdmSession   *session);
+        void (* disconnected)                (GdmSession   *session);
         void (* session_opened)              (GdmSession   *session,
-                                              const char   *service_name);
-        void (* session_open_failed)         (GdmSession   *session,
                                               const char   *service_name,
-                                              const char   *message);
+                                              const char   *session_id);
         void (* session_started)             (GdmSession   *session,
                                               const char   *service_name,
+                                              const char   *session_id,
                                               int           pid);
         void (* session_start_failed)        (GdmSession   *session,
                                               const char   *service_name,
@@ -100,29 +77,25 @@ typedef struct
                                               const char   *service_name);
         void (* conversation_stopped)        (GdmSession   *session,
                                               const char   *service_name);
-        void (* service_unavailable)         (GdmSession   *session,
+        void (* setup_complete)              (GdmSession   *session,
                                               const char   *service_name);
-        void (* selected_user_changed)       (GdmSession   *session,
-                                              const char   *text);
-
-        void (* default_language_name_changed)    (GdmSession   *session,
-                                                   const char   *text);
-        void (* default_session_name_changed)     (GdmSession   *session,
-                                                   const char   *text);
 } GdmSessionClass;
 
 GType            gdm_session_get_type                 (void);
 
-GdmSession      *gdm_session_new                      (const char *display_name,
+GdmSession      *gdm_session_new                      (GdmSessionVerificationMode verification_mode,
+                                                       const char *display_name,
                                                        const char *display_hostname,
                                                        const char *display_device,
                                                        const char *display_seat_id,
                                                        const char *display_x11_authority_file,
                                                        gboolean    display_is_local);
 
+char             *gdm_session_get_server_address          (GdmSession     *session);
 char             *gdm_session_get_username                (GdmSession     *session);
 char             *gdm_session_get_display_device          (GdmSession     *session);
 char             *gdm_session_get_display_seat_id         (GdmSession     *session);
+char             *gdm_session_get_session_id              (GdmSession     *session);
 gboolean          gdm_session_bypasses_xsession           (GdmSession     *session);
 
 void              gdm_session_start_conversation          (GdmSession *session,
@@ -146,8 +119,7 @@ void              gdm_session_authenticate                (GdmSession *session,
 void              gdm_session_authorize                   (GdmSession *session,
                                                            const char *service_name);
 void              gdm_session_accredit                    (GdmSession *session,
-                                                           const char *service_name,
-                                                           int         cred_flag);
+                                                           const char *service_name);
 void              gdm_session_open_session                (GdmSession *session,
                                                            const char *service_name);
 void              gdm_session_start_session               (GdmSession *session,
@@ -168,6 +140,11 @@ void              gdm_session_select_language             (GdmSession *session,
 void              gdm_session_select_user                 (GdmSession *session,
                                                            const char *username);
 void              gdm_session_cancel                      (GdmSession *session);
+void              gdm_session_reset                       (GdmSession *session);
+void              gdm_session_request_timed_login         (GdmSession *session,
+                                                           const char *username,
+                                                           int         delay);
+gboolean          gdm_session_client_is_connected         (GdmSession *session);
 
 G_END_DECLS