2 * Copyright (C) 2010-2011 Robert Ancell.
3 * Author: Robert Ancell <robert.ancell@canonical.com>
5 * This program is free software: you can redistribute it and/or modify it under
6 * the terms of the GNU General Public License as published by the Free Software
7 * Foundation, either version 3 of the License, or (at your option) any later
8 * version. See http://www.gnu.org/copyleft/gpl.html the full text of the
17 #include "configuration.h"
18 #include "guest-account.h"
20 #include "session-config.h"
29 static guint signals[LAST_SIGNAL] = { 0 };
33 /* Configuration for this seat */
34 GHashTable *properties;
36 /* TRUE if able to switch users */
39 /* TRUE if display server can be shared for sessions */
40 gboolean share_display_server;
42 /* The display servers on this seat */
43 GList *display_servers;
45 /* The sessions on this seat */
48 /* The last session set to active */
49 Session *active_session;
51 /* The session to set active when it starts */
52 Session *session_to_activate;
54 /* TRUE once we have started */
57 /* TRUE if stopping this seat (waiting for displays to stop) */
64 /* PAM services to use */
65 #define GREETER_SERVICE "lightdm-greeter"
66 #define USER_SERVICE "lightdm"
67 #define AUTOLOGIN_SERVICE "lightdm-autologin"
69 G_DEFINE_TYPE (Seat, seat, G_TYPE_OBJECT);
76 static GHashTable *seat_modules = NULL;
78 // FIXME: Make a get_display_server() that re-uses display servers if supported
79 static DisplayServer *create_display_server (Seat *seat, const gchar *session_type);
80 static Greeter *create_greeter_session (Seat *seat);
81 static void start_session (Seat *seat, Session *session);
84 seat_register_module (const gchar *name, GType type)
89 seat_modules = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
91 g_debug ("Registered seat module %s", name);
93 module = g_malloc0 (sizeof (SeatModule));
94 module->name = g_strdup (name);
96 g_hash_table_insert (seat_modules, g_strdup (name), module);
100 seat_new (const gchar *module_name)
103 SeatModule *m = NULL;
105 g_return_val_if_fail (module_name != NULL, NULL);
108 m = g_hash_table_lookup (seat_modules, module_name);
112 seat = g_object_new (m->type, NULL);
118 seat_set_property (Seat *seat, const gchar *name, const gchar *value)
120 g_return_if_fail (seat != NULL);
121 g_hash_table_insert (seat->priv->properties, g_strdup (name), g_strdup (value));
125 seat_get_string_property (Seat *seat, const gchar *name)
127 g_return_val_if_fail (seat != NULL, NULL);
128 return g_hash_table_lookup (seat->priv->properties, name);
132 seat_get_boolean_property (Seat *seat, const gchar *name)
134 return g_strcmp0 (seat_get_string_property (seat, name), "true") == 0;
138 seat_get_integer_property (Seat *seat, const gchar *name)
142 value = seat_get_string_property (seat, name);
143 return value ? atoi (value) : 0;
147 seat_set_can_switch (Seat *seat, gboolean can_switch)
149 g_return_if_fail (seat != NULL);
151 seat->priv->can_switch = can_switch;
155 seat_set_share_display_server (Seat *seat, gboolean share_display_server)
157 g_return_if_fail (seat != NULL);
159 seat->priv->share_display_server = share_display_server;
163 seat_start (Seat *seat)
165 g_return_val_if_fail (seat != NULL, FALSE);
167 SEAT_GET_CLASS (seat)->setup (seat);
168 return SEAT_GET_CLASS (seat)->start (seat);
172 seat_get_sessions (Seat *seat)
174 g_return_val_if_fail (seat != NULL, NULL);
175 return seat->priv->sessions;
179 seat_set_active_session (Seat *seat, Session *session)
183 g_return_if_fail (seat != NULL);
185 /* Unlock this session */
186 if (session != seat->priv->active_session && !IS_GREETER (session))
187 session_unlock (session);
189 SEAT_GET_CLASS (seat)->set_active_session (seat, session);
191 /* Stop any greeters */
192 for (link = seat->priv->sessions; link; link = link->next)
194 Session *s = link->data;
196 if (s == session || session_get_is_stopping (s))
201 g_debug ("Stopping greeter");
206 /* Lock previous sessions */
207 if (seat->priv->active_session)
209 if (session != seat->priv->active_session && !IS_GREETER (seat->priv->active_session))
210 session_lock (seat->priv->active_session);
211 g_object_unref (seat->priv->active_session);
213 seat->priv->active_session = g_object_ref (session);
217 seat_get_active_session (Seat *seat)
219 g_return_val_if_fail (seat != NULL, NULL);
220 return SEAT_GET_CLASS (seat)->get_active_session (seat);
224 seat_get_can_switch (Seat *seat)
226 g_return_val_if_fail (seat != NULL, FALSE);
227 return seat->priv->can_switch;
231 seat_get_allow_guest (Seat *seat)
233 g_return_val_if_fail (seat != NULL, FALSE);
234 return seat_get_boolean_property (seat, "allow-guest") && guest_account_is_installed ();
238 run_script (Seat *seat, DisplayServer *display_server, const gchar *script_name, User *user)
241 gboolean result = FALSE;
243 script = process_new ();
245 process_set_command (script, script_name);
247 /* Set POSIX variables */
248 process_set_clear_environment (script, TRUE);
249 process_set_env (script, "SHELL", "/bin/sh");
251 /* Variables required for regression tests */
252 if (g_getenv ("LIGHTDM_TEST_ROOT"))
254 process_set_env (script, "LIGHTDM_TEST_ROOT", g_getenv ("LIGHTDM_TEST_ROOT"));
255 process_set_env (script, "LD_PRELOAD", g_getenv ("LD_PRELOAD"));
256 process_set_env (script, "LD_LIBRARY_PATH", g_getenv ("LD_LIBRARY_PATH"));
257 process_set_env (script, "PATH", g_getenv ("PATH"));
260 process_set_env (script, "PATH", "/usr/local/bin:/usr/bin:/bin");
264 process_set_env (script, "USER", user_get_name (user));
265 process_set_env (script, "LOGNAME", user_get_name (user));
266 process_set_env (script, "HOME", user_get_home_directory (user));
269 process_set_env (script, "HOME", "/");
271 SEAT_GET_CLASS (seat)->run_script (seat, display_server, script);
273 if (process_start (script, TRUE))
277 exit_status = process_get_exit_status (script);
278 if (WIFEXITED (exit_status))
280 g_debug ("Exit status of %s: %d", script_name, WEXITSTATUS (exit_status));
281 result = WEXITSTATUS (exit_status) == EXIT_SUCCESS;
285 g_object_unref (script);
291 seat_real_run_script (Seat *seat, DisplayServer *display_server, Process *process)
296 emit_upstart_signal (const gchar *signal)
298 g_return_if_fail (signal != NULL);
299 g_return_if_fail (signal[0] != 0);
304 gchar *cmd = g_strdup_printf ("initctl -q emit %s DISPLAY_MANAGER=lightdm", signal);
305 g_spawn_command_line_async (cmd, NULL); /* OK if it fails, probably not installed */
310 check_stopped (Seat *seat)
312 if (seat->priv->stopping &&
313 !seat->priv->stopped &&
314 g_list_length (seat->priv->display_servers) == 0 &&
315 g_list_length (seat->priv->sessions) == 0)
317 seat->priv->stopped = TRUE;
318 g_debug ("Seat stopped");
319 g_signal_emit (seat, signals[STOPPED], 0);
324 get_start_local_sessions (Seat *seat)
326 return SEAT_GET_CLASS (seat)->get_start_local_sessions (seat);
330 display_server_stopped_cb (DisplayServer *display_server, Seat *seat)
333 Session *active_session;
335 g_debug ("Display server stopped");
337 g_signal_handlers_disconnect_matched (display_server, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, seat);
338 seat->priv->display_servers = g_list_remove (seat->priv->display_servers, display_server);
340 if (seat->priv->stopping || !seat->priv->started)
342 check_stopped (seat);
343 g_object_unref (display_server);
347 /* Stop all sessions on this display server */
348 list = g_list_copy (seat->priv->sessions);
349 for (link = list; link; link = link->next)
350 g_object_ref (link->data);
351 for (link = list; link; link = link->next)
353 Session *session = link->data;
355 if (session_get_display_server (session) != display_server || session_get_is_stopping (session))
358 /* Stop seat if this is the only display server and it failed to start a greeter */
359 if (IS_GREETER (session) &&
360 !session_get_is_started (session) &&
361 g_list_length (seat->priv->display_servers) == 0)
363 g_debug ("Stopping seat, greeter display server failed to start");
367 g_debug ("Stopping session");
368 session_stop (session);
370 g_list_free_full (list, g_object_unref);
372 if (!seat->priv->stopping && get_start_local_sessions (seat))
374 /* If we were the active session, switch to a greeter */
375 active_session = seat_get_active_session (seat);
376 if (!active_session || session_get_display_server (active_session) == display_server)
378 g_debug ("Active display server stopped, starting greeter");
379 seat_switch_to_greeter (seat);
383 g_object_unref (display_server);
387 can_share_display_server (Seat *seat, DisplayServer *display_server)
389 return seat->priv->share_display_server && display_server_get_can_share (display_server);
393 switch_to_greeter_from_failed_session (Seat *seat, Session *session)
395 Greeter *greeter_session;
397 greeter_session = create_greeter_session (seat);
398 if (session_get_is_guest (session))
399 greeter_set_hint (greeter_session, "select-guest", "true");
401 greeter_set_hint (greeter_session, "select-user", session_get_username (session));
402 if (seat->priv->session_to_activate)
403 g_object_unref (seat->priv->session_to_activate);
404 seat->priv->session_to_activate = g_object_ref (greeter_session);
406 if (can_share_display_server (seat, session_get_display_server (session)))
407 session_set_display_server (SESSION (greeter_session), session_get_display_server (session));
410 DisplayServer *display_server;
412 display_server = create_display_server (seat, session_get_session_type (session));
413 if (!display_server_start (display_server))
415 g_debug ("Failed to start display server for greeter");
419 session_set_display_server (session, display_server);
422 start_session (seat, SESSION (greeter_session));
424 /* Stop failed session */
425 session_stop (session);
429 start_session (Seat *seat, Session *session)
431 /* Use system location for greeter log file */
432 if (IS_GREETER (session))
434 gchar *log_dir, *filename, *log_filename;
436 log_dir = config_get_string (config_get_instance (), "LightDM", "log-directory");
437 filename = g_strdup_printf ("%s-greeter.log", display_server_get_name (session_get_display_server (session)));
438 log_filename = g_build_filename (log_dir, filename, NULL);
441 session_set_log_file (session, log_filename);
442 g_free (log_filename);
445 if (session_start (session))
448 if (IS_GREETER (session))
450 g_debug ("Failed to start greeter");
451 display_server_stop (session_get_display_server (session));
455 g_debug ("Failed to start session, starting greeter");
456 switch_to_greeter_from_failed_session (seat, session);
460 run_session (Seat *seat, Session *session)
464 if (IS_GREETER (session))
465 script = seat_get_string_property (seat, "greeter-setup-script");
467 script = seat_get_string_property (seat, "session-setup-script");
468 if (script && !run_script (seat, session_get_display_server (session), script, NULL))
470 g_debug ("Switching to greeter due to failed setup script");
471 switch_to_greeter_from_failed_session (seat, session);
475 if (!IS_GREETER (session))
477 g_signal_emit (seat, signals[RUNNING_USER_SESSION], 0, session);
478 emit_upstart_signal ("desktop-session-start");
481 session_run (session);
483 // FIXME: Wait until the session is ready
485 if (session == seat->priv->session_to_activate)
487 seat_set_active_session (seat, session);
488 g_object_unref (seat->priv->session_to_activate);
489 seat->priv->session_to_activate = NULL;
494 session_authentication_complete_cb (Session *session, Seat *seat)
496 if (session_get_is_authenticated (session))
498 g_debug ("Session authenticated, running command");
499 run_session (seat, session);
501 else if (!IS_GREETER (session))
503 g_debug ("Switching to greeter due to failed authentication");
504 switch_to_greeter_from_failed_session (seat, session);
508 g_debug ("Stopping session that failed authentication");
509 session_stop (session);
514 session_stopped_cb (Session *session, Seat *seat)
516 DisplayServer *display_server;
518 g_debug ("Session stopped");
520 g_signal_handlers_disconnect_matched (session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, seat);
521 seat->priv->sessions = g_list_remove (seat->priv->sessions, session);
522 if (session == seat->priv->active_session)
524 g_object_unref (seat->priv->active_session);
525 seat->priv->active_session = NULL;
527 if (session == seat->priv->session_to_activate)
529 g_object_unref (seat->priv->session_to_activate);
530 seat->priv->session_to_activate = NULL;
533 display_server = session_get_display_server (session);
536 g_object_unref (session);
541 if (!IS_GREETER (session))
544 script = seat_get_string_property (seat, "session-cleanup-script");
546 run_script (seat, display_server, script, session_get_user (session));
549 /* We were waiting for this session, but it didn't start :( */
550 // FIXME: Start a greeter on this?
551 if (session == seat->priv->session_to_activate)
553 g_object_unref (seat->priv->session_to_activate);
554 seat->priv->session_to_activate = NULL;
557 if (seat->priv->stopping)
559 check_stopped (seat);
560 g_object_unref (session);
564 /* If this is the greeter session then re-use this display server */
565 if (IS_GREETER (session) &&
566 can_share_display_server (seat, display_server) &&
567 greeter_get_start_session (GREETER (session)))
571 for (link = seat->priv->sessions; link; link = link->next)
573 Session *s = link->data;
575 /* Skip this session and sessions on other display servers */
576 if (s == session || session_get_display_server (s) != display_server || session_get_is_stopping (s))
579 if (session_get_is_authenticated (s))
581 g_debug ("Greeter stopped, running session");
582 run_session (seat, s);
586 g_debug ("Greeter stopped, starting session authentication");
587 start_session (seat, s);
592 /* If this is the greeter and nothing else is running then stop the seat */
593 else if (IS_GREETER (session) &&
594 !greeter_get_start_session (GREETER (session)) &&
595 g_list_length (seat->priv->display_servers) == 1 &&
596 g_list_nth_data (seat->priv->display_servers, 0) == display_server)
598 g_debug ("Stopping seat, failed to start a greeter");
601 /* If we were the active session, switch to a greeter */
602 else if (!IS_GREETER (session) && session == seat_get_active_session (seat))
604 g_debug ("Active session stopped, starting greeter");
605 seat_switch_to_greeter (seat);
608 /* Stop the display server if no-longer required */
609 if (display_server && !display_server_get_is_stopping (display_server))
614 for (link = seat->priv->sessions; link; link = link->next)
616 Session *s = link->data;
619 if (session_get_display_server (s) == display_server)
624 g_debug ("Stopping display server, no sessions require it");
625 display_server_stop (display_server);
629 g_signal_emit (seat, signals[SESSION_REMOVED], 0, session);
630 g_object_unref (session);
634 set_session_env (Session *session)
636 /* Connect using the session bus */
639 if (g_getenv ("DBUS_SESSION_BUS_ADDRESS"))
640 session_set_env (session, "DBUS_SESSION_BUS_ADDRESS", g_getenv ("DBUS_SESSION_BUS_ADDRESS"));
641 session_set_env (session, "LDM_BUS", "SESSION");
642 if (g_getenv ("LD_PRELOAD"))
643 session_set_env (session, "LD_PRELOAD", g_getenv ("LD_PRELOAD"));
644 if (g_getenv ("LD_LIBRARY_PATH"))
645 session_set_env (session, "LD_LIBRARY_PATH", g_getenv ("LD_LIBRARY_PATH"));
646 if (g_getenv ("PATH"))
647 session_set_env (session, "PATH", g_getenv ("PATH"));
650 /* Variables required for regression tests */
651 if (g_getenv ("LIGHTDM_TEST_ROOT"))
653 session_set_env (session, "LIGHTDM_TEST_ROOT", g_getenv ("LIGHTDM_TEST_ROOT"));
654 session_set_env (session, "DBUS_SYSTEM_BUS_ADDRESS", g_getenv ("DBUS_SYSTEM_BUS_ADDRESS"));
655 session_set_env (session, "DBUS_SESSION_BUS_ADDRESS", g_getenv ("DBUS_SESSION_BUS_ADDRESS"));
656 session_set_env (session, "LD_PRELOAD", g_getenv ("LD_PRELOAD"));
657 session_set_env (session, "LD_LIBRARY_PATH", g_getenv ("LD_LIBRARY_PATH"));
658 session_set_env (session, "GI_TYPELIB_PATH", g_getenv ("GI_TYPELIB_PATH"));
663 create_session (Seat *seat, gboolean autostart)
667 session = SEAT_GET_CLASS (seat)->create_session (seat);
668 seat->priv->sessions = g_list_append (seat->priv->sessions, session);
670 g_signal_connect (session, "authentication-complete", G_CALLBACK (session_authentication_complete_cb), seat);
671 g_signal_connect (session, "stopped", G_CALLBACK (session_stopped_cb), seat);
673 set_session_env (session);
675 g_signal_emit (seat, signals[SESSION_ADDED], 0, session);
681 get_session_argv (SessionConfig *session_config, const gchar *session_wrapper)
686 GError *error = NULL;
688 /* If configured, run sessions through a wrapper */
691 argv = g_malloc (sizeof (gchar *) * 3);
692 path = g_find_program_in_path (session_wrapper);
693 argv[0] = path ? path : g_strdup (session_wrapper);
694 argv[1] = g_strdup (session_config_get_command (session_config));
699 /* Split command into an array listing and make command absolute */
700 result = g_shell_parse_argv (session_config_get_command (session_config), &argc, &argv, &error);
702 g_debug ("Invalid session command '%s': %s", session_config_get_command (session_config), error->message);
703 g_clear_error (&error);
706 path = g_find_program_in_path (argv[0]);
716 static SessionConfig *
717 find_session_config (const gchar *sessions_dir, const gchar *session_name)
720 SessionConfig *session_config = NULL;
722 GError *error = NULL;
724 g_return_val_if_fail (sessions_dir != NULL, NULL);
725 g_return_val_if_fail (session_name != NULL, NULL);
727 dirs = g_strsplit (sessions_dir, ":", -1);
728 for (i = 0; dirs[i]; i++)
730 gchar *filename, *path;
732 filename = g_strdup_printf ("%s.desktop", session_name);
733 path = g_build_filename (dirs[i], filename, NULL);
735 session_config = session_config_new_from_file (path, &error);
740 if (dirs[i+1] == NULL)
741 g_debug ("Failed to find session configuration %s", session_name);
742 g_clear_error (&error);
746 return session_config;
750 create_user_session (Seat *seat, const gchar *username)
754 const gchar *session_name, *language;
755 SessionConfig *session_config;
756 Session *session = NULL;
758 g_debug ("Creating user session");
760 /* Load user preferences */
761 user = accounts_get_user_by_name (username);
764 g_debug ("Can't login unknown user '%s'", username);
767 session_name = user_get_xsession (user);
768 language = user_get_language (user);
771 session_name = seat_get_string_property (seat, "user-session");
772 sessions_dir = config_get_string (config_get_instance (), "LightDM", "sessions-directory");
773 session_config = find_session_config (sessions_dir, session_name);
774 g_free (sessions_dir);
777 const gchar *desktop_name;
780 session = create_session (seat, TRUE);
781 session_set_session_type (session, session_config_get_session_type (session_config));
782 session_set_env (session, "DESKTOP_SESSION", session_name);
783 session_set_env (session, "GDMSESSION", session_name);
784 desktop_name = session_config_get_desktop_name (session_config);
786 session_set_env (session, "XDG_CURRENT_DESKTOP", desktop_name);
787 if (language && language[0] != '\0')
789 session_set_env (session, "LANG", language);
790 session_set_env (session, "GDM_LANG", language);
792 session_set_pam_service (session, AUTOLOGIN_SERVICE);
793 session_set_username (session, username);
794 session_set_do_authenticate (session, TRUE);
795 argv = get_session_argv (session_config, seat_get_string_property (seat, "session-wrapper"));
796 session_set_argv (session, argv);
799 g_object_unref (session_config);
802 g_debug ("Can't find session '%s'", seat_get_string_property (seat, "user-session"));
805 g_object_unref (user);
811 create_guest_session (Seat *seat)
813 gchar *sessions_dir, **argv;
814 SessionConfig *session_config;
817 sessions_dir = config_get_string (config_get_instance (), "LightDM", "sessions-directory");
818 session_config = find_session_config (sessions_dir, seat_get_string_property (seat, "user-session"));
819 g_free (sessions_dir);
822 g_debug ("Can't find session '%s'", seat_get_string_property (seat, "user-session"));
826 session = create_session (seat, TRUE);
827 session_set_session_type (session, session_config_get_session_type (session_config));
828 session_set_do_authenticate (session, TRUE);
829 session_set_is_guest (session, TRUE);
830 argv = get_session_argv (session_config, seat_get_string_property (seat, "session-wrapper"));
831 g_object_unref (session_config);
832 session_set_argv (session, argv);
839 greeter_create_session_cb (Greeter *greeter, Seat *seat)
843 session = create_session (seat, FALSE);
844 session_set_session_type (session, session_get_session_type (SESSION (greeter)));
845 session_set_display_server (session, session_get_display_server (SESSION (greeter)));
847 return g_object_ref (session);
851 prepend_argv (gchar ***argv, const gchar *value)
853 gchar **old_argv, **new_argv;
857 new_argv = g_malloc (sizeof (gchar *) * (g_strv_length (*argv) + 2));
858 new_argv[0] = g_strdup (value);
859 for (i = 0; old_argv[i]; i++)
860 new_argv[i + 1] = old_argv[i];
861 new_argv[i + 1] = NULL;
868 find_user_session (Seat *seat, const gchar *username)
875 for (link = seat->priv->sessions; link; link = link->next)
877 Session *session = link->data;
879 if (!session_get_is_stopping (session) && strcmp (session_get_username (session), username) == 0)
887 greeter_start_session_cb (Greeter *greeter, SessionType type, const gchar *session_name, Seat *seat)
889 Session *session, *existing_session;
890 const gchar *username, *language = NULL;
891 SessionConfig *session_config;
893 gchar *sessions_dir = NULL;
895 DisplayServer *display_server;
897 /* Get the session to use */
898 if (greeter_get_guest_authenticated (greeter))
900 session = create_guest_session (seat);
903 session_set_pam_service (session, AUTOLOGIN_SERVICE);
906 session = greeter_get_authentication_session (greeter);
908 /* Switch to this session when it is ready */
909 if (seat->priv->session_to_activate)
910 g_object_unref (seat->priv->session_to_activate);
911 seat->priv->session_to_activate = g_object_ref (session);
913 /* Return to existing session if it is open */
914 username = session_get_username (session);
915 existing_session = find_user_session (seat, username);
916 if (existing_session && session != existing_session)
918 g_debug ("Returning to existing user session %s", username);
919 session_stop (session);
920 seat_set_active_session (seat, existing_session);
924 /* Get session command to run */
927 case SESSION_TYPE_LOCAL:
928 sessions_dir = config_get_string (config_get_instance (), "LightDM", "sessions-directory");
930 case SESSION_TYPE_REMOTE:
931 sessions_dir = config_get_string (config_get_instance (), "LightDM", "remote-sessions-directory");
935 /* Load user preferences */
936 user = session_get_user (session);
940 session_name = user_get_xsession (user);
941 language = user_get_language (user);
945 session_name = seat_get_string_property (seat, "user-session");
947 user_set_xsession (session_get_user (session), session_name);
949 session_config = find_session_config (sessions_dir, session_name);
950 g_free (sessions_dir);
953 g_debug ("Can't find session '%s'", seat_get_string_property (seat, "user-session"));
957 session_set_session_type (session, session_config_get_session_type (session_config));
958 argv = get_session_argv (session_config, seat_get_string_property (seat, "session-wrapper"));
959 session_set_argv (session, argv);
961 session_set_env (session, "DESKTOP_SESSION", session_name);
962 session_set_env (session, "GDMSESSION", session_name);
963 if (language && language[0] != '\0')
965 session_set_env (session, "LANG", language);
966 session_set_env (session, "GDM_LANG", language);
969 g_object_unref (session_config);
971 /* If can re-use the display server, stop the greeter first */
972 display_server = session_get_display_server (SESSION (greeter));
973 if (can_share_display_server (seat, display_server) &&
974 strcmp (display_server_get_session_type (display_server), session_get_session_type (session)) == 0)
976 g_debug ("Stopping greeter; display server will be re-used for user session");
978 /* Run on the same display server after the greeter has stopped */
979 session_set_display_server (session, display_server);
981 /* Stop the greeter */
982 session_stop (SESSION (greeter));
986 /* Otherwise start a new display server for this session */
989 display_server = create_display_server (seat, session_get_session_type (session));
990 session_set_display_server (session, display_server);
991 if (!display_server_start (display_server))
993 g_debug ("Failed to start display server for new session");
1002 create_greeter_session (Seat *seat)
1004 gchar *sessions_dir, **argv;
1005 SessionConfig *session_config;
1006 Greeter *greeter_session;
1007 gchar *greeter_user;
1008 const gchar *greeter_wrapper;
1010 g_debug ("Creating greeter session");
1012 sessions_dir = config_get_string (config_get_instance (), "LightDM", "greeters-directory");
1013 session_config = find_session_config (sessions_dir, seat_get_string_property (seat, "greeter-session"));
1014 g_free (sessions_dir);
1015 if (!session_config)
1018 argv = get_session_argv (session_config, NULL);
1019 greeter_wrapper = seat_get_string_property (seat, "greeter-wrapper");
1020 if (greeter_wrapper)
1023 path = g_find_program_in_path (greeter_wrapper);
1024 prepend_argv (&argv, path ? path : greeter_wrapper);
1028 greeter_session = SEAT_GET_CLASS (seat)->create_greeter_session (seat);
1029 session_set_session_type (SESSION (greeter_session), session_config_get_session_type (session_config));
1030 seat->priv->sessions = g_list_append (seat->priv->sessions, SESSION (greeter_session));
1031 g_signal_connect (greeter_session, "authentication-complete", G_CALLBACK (session_authentication_complete_cb), seat);
1032 g_signal_connect (greeter_session, "stopped", G_CALLBACK (session_stopped_cb), seat);
1034 set_session_env (SESSION (greeter_session));
1036 session_set_pam_service (SESSION (greeter_session), GREETER_SERVICE);
1037 greeter_user = config_get_string (config_get_instance (), "LightDM", "greeter-user");
1038 session_set_username (SESSION (greeter_session), greeter_user);
1039 g_free (greeter_user);
1040 session_set_argv (SESSION (greeter_session), argv);
1043 greeter_set_pam_services (greeter_session, USER_SERVICE, AUTOLOGIN_SERVICE);
1044 g_signal_connect (greeter_session, "create-session", G_CALLBACK (greeter_create_session_cb), seat);
1045 g_signal_connect (greeter_session, "start-session", G_CALLBACK (greeter_start_session_cb), seat);
1047 /* Set hints to greeter */
1048 greeter_set_hint (greeter_session, "default-session", seat_get_string_property (seat, "user-session"));
1049 greeter_set_allow_guest (greeter_session, seat_get_allow_guest (seat));
1050 greeter_set_hint (greeter_session, "hide-users", seat_get_boolean_property (seat, "greeter-hide-users") ? "true" : "false");
1051 greeter_set_hint (greeter_session, "show-manual-login", seat_get_boolean_property (seat, "greeter-show-manual-login") ? "true" : "false");
1052 greeter_set_hint (greeter_session, "show-remote-login", seat_get_boolean_property (seat, "greeter-show-remote-login") ? "true" : "false");
1053 greeter_set_hint (greeter_session, "has-guest-account", seat_get_allow_guest (seat) && seat_get_boolean_property (seat, "greeter-allow-guest") ? "true" : "false");
1055 g_object_unref (session_config);
1057 return greeter_session;
1061 find_session_for_display_server (Seat *seat, DisplayServer *display_server)
1065 for (link = seat->priv->sessions; link; link = link->next)
1067 Session *session = link->data;
1068 if (session_get_display_server (session) == display_server && !session_get_is_stopping (session))
1076 display_server_ready_cb (DisplayServer *display_server, Seat *seat)
1078 const gchar *script;
1081 /* Run setup script */
1082 script = seat_get_string_property (seat, "display-setup-script");
1083 if (script && !run_script (seat, display_server, script, NULL))
1085 g_debug ("Stopping display server due to failed setup script");
1086 display_server_stop (display_server);
1090 /* Stop if don't need to run a session */
1091 if (!get_start_local_sessions (seat))
1094 emit_upstart_signal ("login-session-start");
1096 /* Start the session waiting for this display server */
1097 session = find_session_for_display_server (seat, display_server);
1100 if (session_get_is_authenticated (session))
1102 g_debug ("Display server ready, running session");
1103 run_session (seat, session);
1107 g_debug ("Display server ready, starting session authentication");
1108 start_session (seat, session);
1113 g_debug ("Stopping not required display server");
1114 display_server_stop (display_server);
1118 static DisplayServer *
1119 create_display_server (Seat *seat, const gchar *session_type)
1121 DisplayServer *display_server;
1123 g_debug ("Creating display server of type %s", session_type);
1125 display_server = SEAT_GET_CLASS (seat)->create_display_server (seat, session_type);
1126 if (!display_server)
1129 seat->priv->display_servers = g_list_append (seat->priv->display_servers, display_server);
1130 g_signal_connect (display_server, "ready", G_CALLBACK (display_server_ready_cb), seat);
1131 g_signal_connect (display_server, "stopped", G_CALLBACK (display_server_stopped_cb), seat);
1133 return display_server;
1137 find_greeter_session (Seat *seat)
1141 for (link = seat->priv->sessions; link; link = link->next)
1143 Session *session = link->data;
1144 if (!session_get_is_stopping (session) && IS_GREETER (session))
1145 return GREETER (session);
1152 seat_switch_to_greeter (Seat *seat)
1154 Greeter *greeter_session;
1155 DisplayServer *display_server;
1157 g_return_val_if_fail (seat != NULL, FALSE);
1159 if (!seat->priv->can_switch)
1162 /* Switch to greeter if one open (shouldn't be though) */
1163 greeter_session = find_greeter_session (seat);
1164 if (greeter_session)
1166 g_debug ("Switching to existing greeter");
1167 seat_set_active_session (seat, SESSION (greeter_session));
1171 greeter_session = create_greeter_session (seat);
1172 if (seat->priv->session_to_activate)
1173 g_object_unref (seat->priv->session_to_activate);
1174 seat->priv->session_to_activate = g_object_ref (greeter_session);
1176 display_server = create_display_server (seat, session_get_session_type (SESSION (greeter_session)));
1177 session_set_display_server (SESSION (greeter_session), display_server);
1178 if (!display_server_start (display_server))
1185 seat_switch_to_user (Seat *seat, const gchar *username, const gchar *session_name)
1188 DisplayServer *display_server;
1190 g_return_val_if_fail (seat != NULL, FALSE);
1191 g_return_val_if_fail (username != NULL, FALSE);
1193 if (!seat->priv->can_switch)
1196 g_debug ("Switching to user %s", username);
1198 session = find_user_session (seat, username);
1201 g_debug ("Switching to existing user session %s", username);
1202 seat_set_active_session (seat, session);
1206 session = create_user_session (seat, username);
1209 if (seat->priv->session_to_activate)
1210 g_object_unref (seat->priv->session_to_activate);
1211 seat->priv->session_to_activate = g_object_ref (session);
1212 session_set_pam_service (session, USER_SERVICE);
1214 display_server = create_display_server (seat, session_get_session_type (session));
1215 session_set_display_server (session, display_server);
1216 if (!display_server_start (display_server))
1223 find_guest_session (Seat *seat)
1227 for (link = seat->priv->sessions; link; link = link->next)
1229 Session *session = link->data;
1230 if (!session_get_is_stopping (session) && session_get_is_guest (session))
1238 seat_switch_to_guest (Seat *seat, const gchar *session_name)
1241 DisplayServer *display_server;
1243 g_return_val_if_fail (seat != NULL, FALSE);
1245 if (!seat->priv->can_switch || !seat_get_allow_guest (seat))
1248 /* Switch to session if one open */
1249 session = find_guest_session (seat);
1252 g_debug ("Switching to existing guest account %s", session_get_username (session));
1253 seat_set_active_session (seat, session);
1257 session = create_guest_session (seat);
1261 display_server = create_display_server (seat, session_get_session_type (session));
1262 if (!display_server_start (display_server))
1265 if (seat->priv->session_to_activate)
1266 g_object_unref (seat->priv->session_to_activate);
1267 seat->priv->session_to_activate = g_object_ref (session);
1268 session_set_pam_service (session, AUTOLOGIN_SERVICE);
1269 session_set_display_server (session, display_server);
1275 seat_lock (Seat *seat, const gchar *username)
1277 Greeter *greeter_session;
1278 DisplayServer *display_server;
1280 g_return_val_if_fail (seat != NULL, FALSE);
1282 if (!seat->priv->can_switch)
1285 g_debug ("Locking seat");
1287 /* Switch to greeter if one open (shouldn't be though) */
1288 greeter_session = find_greeter_session (seat);
1289 if (greeter_session)
1291 g_debug ("Switching to existing greeter");
1292 seat_set_active_session (seat, SESSION (greeter_session));
1296 greeter_session = create_greeter_session (seat);
1297 if (!greeter_session)
1300 display_server = create_display_server (seat, session_get_session_type (SESSION (greeter_session)));
1301 if (!display_server_start (display_server))
1304 if (seat->priv->session_to_activate)
1305 g_object_unref (seat->priv->session_to_activate);
1306 seat->priv->session_to_activate = g_object_ref (greeter_session);
1307 greeter_set_hint (greeter_session, "lock-screen", "true");
1309 greeter_set_hint (greeter_session, "select-user", username);
1310 session_set_display_server (SESSION (greeter_session), display_server);
1316 seat_stop (Seat *seat)
1318 g_return_if_fail (seat != NULL);
1320 if (seat->priv->stopping)
1323 g_debug ("Stopping seat");
1324 seat->priv->stopping = TRUE;
1325 SEAT_GET_CLASS (seat)->stop (seat);
1329 seat_get_is_stopping (Seat *seat)
1331 g_return_val_if_fail (seat != NULL, FALSE);
1332 return seat->priv->stopping;
1336 seat_real_get_start_local_sessions (Seat *seat)
1342 seat_real_setup (Seat *seat)
1347 seat_real_start (Seat *seat)
1349 const gchar *autologin_username;
1350 int autologin_timeout;
1351 gboolean autologin_guest;
1352 gboolean autologin_in_background;
1353 Session *session = NULL, *background_session = NULL;
1355 g_debug ("Starting seat");
1357 /* If this display server doesn't have a session running on it, just start it */
1358 if (!get_start_local_sessions (seat))
1360 DisplayServer *display_server;
1361 display_server = create_display_server (seat, "x"); // FIXME: Not necessarily an X seat, but not sure what to put here
1362 return display_server_start (display_server);
1365 /* Get autologin settings */
1366 autologin_username = seat_get_string_property (seat, "autologin-user");
1367 if (g_strcmp0 (autologin_username, "") == 0)
1368 autologin_username = NULL;
1369 autologin_timeout = seat_get_integer_property (seat, "autologin-user-timeout");
1370 autologin_guest = seat_get_boolean_property (seat, "autologin-guest");
1371 autologin_in_background = seat_get_boolean_property (seat, "autologin-in-background");
1373 /* Autologin if configured */
1374 if (autologin_timeout == 0 || autologin_in_background)
1376 if (autologin_guest)
1377 session = create_guest_session (seat);
1378 else if (autologin_username != NULL)
1379 session = create_user_session (seat, autologin_username);
1382 session_set_pam_service (session, AUTOLOGIN_SERVICE);
1384 /* Load in background if required */
1385 if (autologin_in_background && session)
1387 background_session = session;
1393 DisplayServer *display_server;
1395 if (seat->priv->session_to_activate)
1396 g_object_unref (seat->priv->session_to_activate);
1397 seat->priv->session_to_activate = g_object_ref (session);
1399 display_server = create_display_server (seat, session_get_session_type (session));
1400 session_set_display_server (session, display_server);
1401 if (!display_server || !display_server_start (display_server))
1403 g_debug ("Can't create display server for automatic login");
1404 session_stop (session);
1406 display_server_stop (display_server);
1412 /* Fallback to a greeter */
1415 Greeter *greeter_session;
1416 DisplayServer *display_server;
1418 greeter_session = create_greeter_session (seat);
1419 if (!greeter_session)
1421 g_debug ("Failed to create greeter session");
1425 if (seat->priv->session_to_activate)
1426 g_object_unref (seat->priv->session_to_activate);
1427 seat->priv->session_to_activate = g_object_ref (greeter_session);
1428 session = SESSION (greeter_session);
1430 if (autologin_timeout)
1434 value = g_strdup_printf ("%d", autologin_timeout);
1435 greeter_set_hint (greeter_session, "autologin-timeout", value);
1437 if (autologin_username)
1438 greeter_set_hint (greeter_session, "autologin-user", autologin_username);
1439 if (autologin_guest)
1440 greeter_set_hint (greeter_session, "autologin-guest", "true");
1443 display_server = create_display_server (seat, session_get_session_type (session));
1444 session_set_display_server (session, display_server);
1445 if (!display_server || !display_server_start (display_server))
1447 g_debug ("Can't create display server for greeter");
1448 session_stop (session);
1450 display_server_stop (display_server);
1455 /* Fail if can't start a session */
1462 /* Start background session */
1463 if (background_session)
1465 DisplayServer *background_display_server;
1467 background_display_server = create_display_server (seat, session_get_session_type (background_session));
1468 session_set_display_server (background_session, background_display_server);
1469 if (!display_server_start (background_display_server))
1470 g_warning ("Failed to start display server for background session");
1473 seat->priv->started = TRUE;
1478 seat_real_create_greeter_session (Seat *seat)
1480 return greeter_new ();
1484 seat_real_create_session (Seat *seat)
1486 return session_new ();
1490 seat_real_set_active_session (Seat *seat, Session *session)
1495 seat_real_get_active_session (Seat *seat)
1501 seat_real_stop (Seat *seat)
1505 check_stopped (seat);
1506 if (seat->priv->stopped)
1509 /* Stop all the display servers and sessions on the seat. Copy the list as
1510 * it might be modified if a display server / session stops during this loop */
1511 list = g_list_copy (seat->priv->display_servers);
1512 for (link = list; link; link = link->next)
1513 g_object_ref (link->data);
1514 for (link = list; link; link = link->next)
1516 DisplayServer *display_server = link->data;
1517 if (!display_server_get_is_stopping (display_server))
1519 g_debug ("Stopping display server");
1520 display_server_stop (display_server);
1523 g_list_free_full (list, g_object_unref);
1524 list = g_list_copy (seat->priv->sessions);
1525 for (link = list; link; link = link->next)
1526 g_object_ref (link->data);
1527 for (link = list; link; link = link->next)
1529 Session *session = link->data;
1530 if (!session_get_is_stopping (session))
1532 g_debug ("Stopping session");
1533 session_stop (session);
1536 g_list_free_full (list, g_object_unref);
1540 seat_init (Seat *seat)
1542 seat->priv = G_TYPE_INSTANCE_GET_PRIVATE (seat, SEAT_TYPE, SeatPrivate);
1543 seat->priv->properties = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
1544 seat->priv->share_display_server = TRUE;
1548 seat_finalize (GObject *object)
1553 self = SEAT (object);
1555 g_hash_table_unref (self->priv->properties);
1556 for (link = self->priv->display_servers; link; link = link->next)
1558 DisplayServer *display_server = link->data;
1559 g_signal_handlers_disconnect_matched (display_server, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, self);
1561 g_list_free_full (self->priv->display_servers, g_object_unref);
1562 for (link = self->priv->sessions; link; link = link->next)
1564 Session *session = link->data;
1565 g_signal_handlers_disconnect_matched (session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, self);
1567 g_list_free_full (self->priv->sessions, g_object_unref);
1568 if (self->priv->active_session)
1569 g_object_unref (self->priv->active_session);
1570 if (self->priv->session_to_activate)
1571 g_object_unref (self->priv->session_to_activate);
1573 G_OBJECT_CLASS (seat_parent_class)->finalize (object);
1577 seat_class_init (SeatClass *klass)
1579 GObjectClass *object_class = G_OBJECT_CLASS (klass);
1581 klass->get_start_local_sessions = seat_real_get_start_local_sessions;
1582 klass->setup = seat_real_setup;
1583 klass->start = seat_real_start;
1584 klass->create_greeter_session = seat_real_create_greeter_session;
1585 klass->create_session = seat_real_create_session;
1586 klass->set_active_session = seat_real_set_active_session;
1587 klass->get_active_session = seat_real_get_active_session;
1588 klass->run_script = seat_real_run_script;
1589 klass->stop = seat_real_stop;
1591 object_class->finalize = seat_finalize;
1593 g_type_class_add_private (klass, sizeof (SeatPrivate));
1595 signals[SESSION_ADDED] =
1596 g_signal_new ("session-added",
1597 G_TYPE_FROM_CLASS (klass),
1599 G_STRUCT_OFFSET (SeatClass, session_added),
1602 G_TYPE_NONE, 1, SESSION_TYPE);
1603 signals[RUNNING_USER_SESSION] =
1604 g_signal_new ("running-user-session",
1605 G_TYPE_FROM_CLASS (klass),
1607 G_STRUCT_OFFSET (SeatClass, running_user_session),
1610 G_TYPE_NONE, 1, SESSION_TYPE);
1611 signals[SESSION_REMOVED] =
1612 g_signal_new ("session-removed",
1613 G_TYPE_FROM_CLASS (klass),
1615 G_STRUCT_OFFSET (SeatClass, session_removed),
1618 G_TYPE_NONE, 1, SESSION_TYPE);
1620 g_signal_new ("stopped",
1621 G_TYPE_FROM_CLASS (klass),
1623 G_STRUCT_OFFSET (SeatClass, stopped),