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 session to set active when it starts */
49 Session *session_to_activate;
51 /* TRUE once we have started */
54 /* TRUE if stopping this seat (waiting for displays to stop) */
61 /* PAM services to use */
62 #define GREETER_SERVICE "lightdm-greeter"
63 #define USER_SERVICE "lightdm"
64 #define AUTOLOGIN_SERVICE "lightdm-autologin"
66 G_DEFINE_TYPE (Seat, seat, G_TYPE_OBJECT);
73 static GHashTable *seat_modules = NULL;
75 // FIXME: Make a get_display_server() that re-uses display servers if supported
76 static DisplayServer *create_display_server (Seat *seat, const gchar *session_type);
77 static Greeter *create_greeter_session (Seat *seat);
78 static void start_session (Seat *seat, Session *session);
81 seat_register_module (const gchar *name, GType type)
86 seat_modules = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
88 g_debug ("Registered seat module %s", name);
90 module = g_malloc0 (sizeof (SeatModule));
91 module->name = g_strdup (name);
93 g_hash_table_insert (seat_modules, g_strdup (name), module);
97 seat_new (const gchar *module_name)
100 SeatModule *m = NULL;
102 g_return_val_if_fail (module_name != NULL, NULL);
105 m = g_hash_table_lookup (seat_modules, module_name);
109 seat = g_object_new (m->type, NULL);
115 seat_set_property (Seat *seat, const gchar *name, const gchar *value)
117 g_return_if_fail (seat != NULL);
118 g_hash_table_insert (seat->priv->properties, g_strdup (name), g_strdup (value));
122 seat_get_string_property (Seat *seat, const gchar *name)
124 g_return_val_if_fail (seat != NULL, NULL);
125 return g_hash_table_lookup (seat->priv->properties, name);
129 seat_get_boolean_property (Seat *seat, const gchar *name)
131 return g_strcmp0 (seat_get_string_property (seat, name), "true") == 0;
135 seat_get_integer_property (Seat *seat, const gchar *name)
139 value = seat_get_string_property (seat, name);
140 return value ? atoi (value) : 0;
144 seat_set_can_switch (Seat *seat, gboolean can_switch)
146 g_return_if_fail (seat != NULL);
148 seat->priv->can_switch = can_switch;
152 seat_set_share_display_server (Seat *seat, gboolean share_display_server)
154 g_return_if_fail (seat != NULL);
156 seat->priv->share_display_server = share_display_server;
160 seat_start (Seat *seat)
162 g_return_val_if_fail (seat != NULL, FALSE);
164 SEAT_GET_CLASS (seat)->setup (seat);
165 return SEAT_GET_CLASS (seat)->start (seat);
169 seat_get_sessions (Seat *seat)
171 g_return_val_if_fail (seat != NULL, NULL);
172 return seat->priv->sessions;
176 seat_set_active_session (Seat *seat, Session *session)
180 g_return_if_fail (seat != NULL);
182 SEAT_GET_CLASS (seat)->set_active_session (seat, session);
184 /* Stop any greeters */
185 for (link = seat->priv->sessions; link; link = link->next)
187 Session *s = link->data;
189 if (s == session || session_get_is_stopping (s))
194 g_debug ("Stopping greeter");
201 seat_get_active_session (Seat *seat)
203 g_return_val_if_fail (seat != NULL, NULL);
204 return SEAT_GET_CLASS (seat)->get_active_session (seat);
208 seat_get_can_switch (Seat *seat)
210 g_return_val_if_fail (seat != NULL, FALSE);
211 return seat->priv->can_switch;
215 seat_get_allow_guest (Seat *seat)
217 g_return_val_if_fail (seat != NULL, FALSE);
218 return seat_get_boolean_property (seat, "allow-guest") && guest_account_is_installed ();
222 run_script (Seat *seat, DisplayServer *display_server, const gchar *script_name, User *user)
225 gboolean result = FALSE;
227 script = process_new ();
229 process_set_command (script, script_name);
231 /* Set POSIX variables */
232 process_set_clear_environment (script, TRUE);
233 process_set_env (script, "SHELL", "/bin/sh");
235 /* Variables required for regression tests */
236 if (g_getenv ("LIGHTDM_TEST_ROOT"))
238 process_set_env (script, "LIGHTDM_TEST_ROOT", g_getenv ("LIGHTDM_TEST_ROOT"));
239 process_set_env (script, "LD_PRELOAD", g_getenv ("LD_PRELOAD"));
240 process_set_env (script, "LD_LIBRARY_PATH", g_getenv ("LD_LIBRARY_PATH"));
241 process_set_env (script, "PATH", g_getenv ("PATH"));
244 process_set_env (script, "PATH", "/usr/local/bin:/usr/bin:/bin");
248 process_set_env (script, "USER", user_get_name (user));
249 process_set_env (script, "LOGNAME", user_get_name (user));
250 process_set_env (script, "HOME", user_get_home_directory (user));
253 process_set_env (script, "HOME", "/");
255 SEAT_GET_CLASS (seat)->run_script (seat, display_server, script);
257 if (process_start (script, TRUE))
261 exit_status = process_get_exit_status (script);
262 if (WIFEXITED (exit_status))
264 g_debug ("Exit status of %s: %d", script_name, WEXITSTATUS (exit_status));
265 result = WEXITSTATUS (exit_status) == EXIT_SUCCESS;
269 g_object_unref (script);
275 seat_real_run_script (Seat *seat, DisplayServer *display_server, Process *process)
280 emit_upstart_signal (const gchar *signal)
282 g_return_if_fail (signal != NULL);
283 g_return_if_fail (signal[0] != 0);
288 gchar *cmd = g_strdup_printf ("initctl -q emit %s DISPLAY_MANAGER=lightdm", signal);
289 g_spawn_command_line_async (cmd, NULL); /* OK if it fails, probably not installed */
294 check_stopped (Seat *seat)
296 if (seat->priv->stopping &&
297 !seat->priv->stopped &&
298 g_list_length (seat->priv->display_servers) == 0 &&
299 g_list_length (seat->priv->sessions) == 0)
301 seat->priv->stopped = TRUE;
302 g_debug ("Seat stopped");
303 g_signal_emit (seat, signals[STOPPED], 0);
308 get_start_local_sessions (Seat *seat)
310 return SEAT_GET_CLASS (seat)->get_start_local_sessions (seat);
314 display_server_stopped_cb (DisplayServer *display_server, Seat *seat)
317 Session *active_session;
319 g_debug ("Display server stopped");
321 g_signal_handlers_disconnect_matched (display_server, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, seat);
322 seat->priv->display_servers = g_list_remove (seat->priv->display_servers, display_server);
324 if (seat->priv->stopping || !seat->priv->started)
326 check_stopped (seat);
327 g_object_unref (display_server);
331 /* Stop all sessions on this display server */
332 list = g_list_copy (seat->priv->sessions);
333 for (link = list; link; link = link->next)
334 g_object_ref (link->data);
335 for (link = list; link; link = link->next)
337 Session *session = link->data;
339 if (session_get_display_server (session) != display_server || session_get_is_stopping (session))
342 /* Stop seat if this is the only display server and it failed to start a greeter */
343 if (IS_GREETER (session) &&
344 !session_get_is_started (session) &&
345 g_list_length (seat->priv->display_servers) == 0)
347 g_debug ("Stopping seat, greeter display server failed to start");
351 g_debug ("Stopping session");
352 session_stop (session);
354 g_list_free_full (list, g_object_unref);
356 if (!seat->priv->stopping && get_start_local_sessions (seat))
358 /* If we were the active session, switch to a greeter */
359 active_session = seat_get_active_session (seat);
360 if (!active_session || session_get_display_server (active_session) == display_server)
362 g_debug ("Active display server stopped, starting greeter");
363 seat_switch_to_greeter (seat);
367 g_object_unref (display_server);
371 can_share_display_server (Seat *seat, DisplayServer *display_server)
373 return seat->priv->share_display_server && display_server_get_can_share (display_server);
377 switch_to_greeter_from_failed_session (Seat *seat, Session *session)
379 Greeter *greeter_session;
381 greeter_session = create_greeter_session (seat);
382 if (session_get_is_guest (session))
383 greeter_set_hint (greeter_session, "select-guest", "true");
385 greeter_set_hint (greeter_session, "select-user", session_get_username (session));
386 if (seat->priv->session_to_activate)
387 g_object_unref (seat->priv->session_to_activate);
388 seat->priv->session_to_activate = g_object_ref (greeter_session);
390 if (can_share_display_server (seat, session_get_display_server (session)))
391 session_set_display_server (SESSION (greeter_session), session_get_display_server (session));
394 DisplayServer *display_server;
396 display_server = create_display_server (seat, session_get_session_type (session));
397 if (!display_server_start (display_server))
399 g_debug ("Failed to start display server for greeter");
403 session_set_display_server (session, display_server);
406 start_session (seat, SESSION (greeter_session));
408 /* Stop failed session */
409 session_stop (session);
413 start_session (Seat *seat, Session *session)
415 /* Use system location for greeter log file */
416 if (IS_GREETER (session))
418 gchar *log_dir, *filename, *log_filename;
420 log_dir = config_get_string (config_get_instance (), "LightDM", "log-directory");
421 filename = g_strdup_printf ("%s-greeter.log", display_server_get_name (session_get_display_server (session)));
422 log_filename = g_build_filename (log_dir, filename, NULL);
425 session_set_log_file (session, log_filename);
426 g_free (log_filename);
429 if (session_start (session))
432 if (IS_GREETER (session))
434 g_debug ("Failed to start greeter");
435 display_server_stop (session_get_display_server (session));
439 g_debug ("Failed to start session, starting greeter");
440 switch_to_greeter_from_failed_session (seat, session);
444 run_session (Seat *seat, Session *session)
448 if (IS_GREETER (session))
449 script = seat_get_string_property (seat, "greeter-setup-script");
451 script = seat_get_string_property (seat, "session-setup-script");
452 if (script && !run_script (seat, session_get_display_server (session), script, NULL))
454 g_debug ("Switching to greeter due to failed setup script");
455 switch_to_greeter_from_failed_session (seat, session);
459 if (!IS_GREETER (session))
460 g_signal_emit (seat, signals[RUNNING_USER_SESSION], 0, session);
462 session_run (session);
464 // FIXME: Wait until the session is ready
466 if (session == seat->priv->session_to_activate)
468 seat_set_active_session (seat, session);
469 g_object_unref (seat->priv->session_to_activate);
470 seat->priv->session_to_activate = NULL;
475 session_authentication_complete_cb (Session *session, Seat *seat)
477 if (session_get_is_authenticated (session))
479 g_debug ("Session authenticated, running command");
480 run_session (seat, session);
482 else if (!IS_GREETER (session))
484 g_debug ("Switching to greeter due to failed authentication");
485 switch_to_greeter_from_failed_session (seat, session);
489 g_debug ("Stopping session that failed authentication");
490 session_stop (session);
495 session_stopped_cb (Session *session, Seat *seat)
497 DisplayServer *display_server;
499 g_debug ("Session stopped");
501 g_signal_handlers_disconnect_matched (session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, seat);
502 seat->priv->sessions = g_list_remove (seat->priv->sessions, session);
504 display_server = session_get_display_server (session);
507 g_object_unref (session);
512 if (!IS_GREETER (session))
515 script = seat_get_string_property (seat, "session-cleanup-script");
517 run_script (seat, display_server, script, session_get_user (session));
520 /* We were waiting for this session, but it didn't start :( */
521 // FIXME: Start a greeter on this?
522 if (session == seat->priv->session_to_activate)
524 g_object_unref (seat->priv->session_to_activate);
525 seat->priv->session_to_activate = NULL;
528 if (seat->priv->stopping)
530 check_stopped (seat);
531 g_object_unref (session);
535 /* If this is the greeter session then re-use this display server */
536 if (IS_GREETER (session) &&
537 can_share_display_server (seat, display_server) &&
538 greeter_get_start_session (GREETER (session)))
542 for (link = seat->priv->sessions; link; link = link->next)
544 Session *s = link->data;
546 /* Skip this session and sessions on other display servers */
547 if (s == session || session_get_display_server (s) != display_server || session_get_is_stopping (s))
550 if (session_get_is_authenticated (s))
552 g_debug ("Greeter stopped, running session");
553 run_session (seat, s);
557 g_debug ("Greeter stopped, starting session authentication");
558 start_session (seat, s);
563 /* If this is the greeter and nothing else is running then stop the seat */
564 else if (IS_GREETER (session) &&
565 !greeter_get_start_session (GREETER (session)) &&
566 g_list_length (seat->priv->display_servers) == 1 &&
567 g_list_nth_data (seat->priv->display_servers, 0) == display_server)
569 g_debug ("Stopping seat, failed to start a greeter");
572 /* If we were the active session, switch to a greeter */
573 else if (!IS_GREETER (session) && session == seat_get_active_session (seat))
575 g_debug ("Active session stopped, starting greeter");
576 seat_switch_to_greeter (seat);
579 /* Stop the display server if no-longer required */
580 if (display_server && !display_server_get_is_stopping (display_server))
585 for (link = seat->priv->sessions; link; link = link->next)
587 Session *s = link->data;
590 if (session_get_display_server (s) == display_server)
595 g_debug ("Stopping display server, no sessions require it");
596 display_server_stop (display_server);
600 g_signal_emit (seat, signals[SESSION_REMOVED], 0, session);
601 g_object_unref (session);
605 set_session_env (Session *session)
607 /* Connect using the session bus */
610 if (g_getenv ("DBUS_SESSION_BUS_ADDRESS"))
611 session_set_env (session, "DBUS_SESSION_BUS_ADDRESS", g_getenv ("DBUS_SESSION_BUS_ADDRESS"));
612 session_set_env (session, "LDM_BUS", "SESSION");
613 if (g_getenv ("LD_PRELOAD"))
614 session_set_env (session, "LD_PRELOAD", g_getenv ("LD_PRELOAD"));
615 if (g_getenv ("LD_LIBRARY_PATH"))
616 session_set_env (session, "LD_LIBRARY_PATH", g_getenv ("LD_LIBRARY_PATH"));
617 if (g_getenv ("PATH"))
618 session_set_env (session, "PATH", g_getenv ("PATH"));
621 /* Variables required for regression tests */
622 if (g_getenv ("LIGHTDM_TEST_ROOT"))
624 session_set_env (session, "LIGHTDM_TEST_ROOT", g_getenv ("LIGHTDM_TEST_ROOT"));
625 session_set_env (session, "DBUS_SYSTEM_BUS_ADDRESS", g_getenv ("DBUS_SYSTEM_BUS_ADDRESS"));
626 session_set_env (session, "DBUS_SESSION_BUS_ADDRESS", g_getenv ("DBUS_SESSION_BUS_ADDRESS"));
627 session_set_env (session, "LD_PRELOAD", g_getenv ("LD_PRELOAD"));
628 session_set_env (session, "LD_LIBRARY_PATH", g_getenv ("LD_LIBRARY_PATH"));
629 session_set_env (session, "GI_TYPELIB_PATH", g_getenv ("GI_TYPELIB_PATH"));
634 create_session (Seat *seat, gboolean autostart)
638 session = SEAT_GET_CLASS (seat)->create_session (seat);
639 seat->priv->sessions = g_list_append (seat->priv->sessions, session);
641 g_signal_connect (session, "authentication-complete", G_CALLBACK (session_authentication_complete_cb), seat);
642 g_signal_connect (session, "stopped", G_CALLBACK (session_stopped_cb), seat);
644 set_session_env (session);
646 g_signal_emit (seat, signals[SESSION_ADDED], 0, session);
652 get_session_argv (SessionConfig *session_config, const gchar *session_wrapper)
657 GError *error = NULL;
659 /* If configured, run sessions through a wrapper */
662 argv = g_malloc (sizeof (gchar *) * 3);
663 path = g_find_program_in_path (session_wrapper);
664 argv[0] = path ? path : g_strdup (session_wrapper);
665 argv[1] = g_strdup (session_config_get_command (session_config));
670 /* Split command into an array listing and make command absolute */
671 result = g_shell_parse_argv (session_config_get_command (session_config), &argc, &argv, &error);
673 g_debug ("Invalid session command '%s': %s", session_config_get_command (session_config), error->message);
674 g_clear_error (&error);
677 path = g_find_program_in_path (argv[0]);
687 static SessionConfig *
688 find_session_config (const gchar *sessions_dir, const gchar *session_name)
691 SessionConfig *session_config = NULL;
693 GError *error = NULL;
695 g_return_val_if_fail (sessions_dir != NULL, NULL);
696 g_return_val_if_fail (session_name != NULL, NULL);
698 dirs = g_strsplit (sessions_dir, ":", -1);
699 for (i = 0; dirs[i]; i++)
701 gchar *filename, *path;
703 filename = g_strdup_printf ("%s.desktop", session_name);
704 path = g_build_filename (dirs[i], filename, NULL);
706 session_config = session_config_new_from_file (path, &error);
711 if (dirs[i+1] == NULL)
712 g_debug ("Failed to find session configuration %s", session_name);
713 g_clear_error (&error);
717 return session_config;
721 create_user_session (Seat *seat, const gchar *username)
725 const gchar *session_name, *language;
726 SessionConfig *session_config;
727 Session *session = NULL;
729 g_debug ("Creating user session");
731 /* Load user preferences */
732 user = accounts_get_user_by_name (username);
735 g_debug ("Can't login unknown user '%s'", username);
738 session_name = user_get_xsession (user);
739 language = user_get_language (user);
742 session_name = seat_get_string_property (seat, "user-session");
743 sessions_dir = config_get_string (config_get_instance (), "LightDM", "sessions-directory");
744 session_config = find_session_config (sessions_dir, session_name);
745 g_free (sessions_dir);
750 session = create_session (seat, TRUE);
751 session_set_session_type (session, session_config_get_session_type (session_config));
752 session_set_env (session, "DESKTOP_SESSION", session_name);
753 session_set_env (session, "GDMSESSION", session_name);
754 if (language && language[0] != '\0')
756 session_set_env (session, "LANG", language);
757 session_set_env (session, "GDM_LANG", language);
759 session_set_pam_service (session, AUTOLOGIN_SERVICE);
760 session_set_username (session, username);
761 session_set_do_authenticate (session, TRUE);
762 argv = get_session_argv (session_config, seat_get_string_property (seat, "session-wrapper"));
763 session_set_argv (session, argv);
766 g_object_unref (session_config);
769 g_debug ("Can't find session '%s'", seat_get_string_property (seat, "user-session"));
772 g_object_unref (user);
778 create_guest_session (Seat *seat)
780 gchar *sessions_dir, **argv;
781 SessionConfig *session_config;
784 sessions_dir = config_get_string (config_get_instance (), "LightDM", "sessions-directory");
785 session_config = find_session_config (sessions_dir, seat_get_string_property (seat, "user-session"));
786 g_free (sessions_dir);
789 g_debug ("Can't find session '%s'", seat_get_string_property (seat, "user-session"));
793 session = create_session (seat, TRUE);
794 session_set_session_type (session, session_config_get_session_type (session_config));
795 session_set_do_authenticate (session, TRUE);
796 session_set_is_guest (session, TRUE);
797 argv = get_session_argv (session_config, seat_get_string_property (seat, "session-wrapper"));
798 g_object_unref (session_config);
799 session_set_argv (session, argv);
806 greeter_create_session_cb (Greeter *greeter, Seat *seat)
810 session = create_session (seat, FALSE);
811 session_set_session_type (session, session_get_session_type (SESSION (greeter)));
812 session_set_display_server (session, session_get_display_server (SESSION (greeter)));
814 return g_object_ref (session);
818 prepend_argv (gchar ***argv, const gchar *value)
820 gchar **old_argv, **new_argv;
824 new_argv = g_malloc (sizeof (gchar *) * (g_strv_length (*argv) + 2));
825 new_argv[0] = g_strdup (value);
826 for (i = 0; old_argv[i]; i++)
827 new_argv[i + 1] = old_argv[i];
828 new_argv[i + 1] = NULL;
835 find_user_session (Seat *seat, const gchar *username)
842 for (link = seat->priv->sessions; link; link = link->next)
844 Session *session = link->data;
846 if (!session_get_is_stopping (session) && strcmp (session_get_username (session), username) == 0)
854 greeter_start_session_cb (Greeter *greeter, SessionType type, const gchar *session_name, Seat *seat)
856 Session *session, *existing_session;
857 const gchar *username, *language = NULL;
858 SessionConfig *session_config;
860 gchar *sessions_dir = NULL;
862 DisplayServer *display_server;
864 /* Get the session to use */
865 if (greeter_get_guest_authenticated (greeter))
867 session = create_guest_session (seat);
870 session_set_pam_service (session, AUTOLOGIN_SERVICE);
873 session = greeter_get_authentication_session (greeter);
875 /* Switch to this session when it is ready */
876 if (seat->priv->session_to_activate)
877 g_object_unref (seat->priv->session_to_activate);
878 seat->priv->session_to_activate = g_object_ref (session);
880 /* Return to existing session if it is open */
881 username = session_get_username (session);
882 existing_session = find_user_session (seat, username);
883 if (existing_session && session != existing_session)
885 g_debug ("Returning to existing user session %s", username);
886 session_stop (session);
887 seat_set_active_session (seat, existing_session);
891 /* Get session command to run */
894 case SESSION_TYPE_LOCAL:
895 sessions_dir = config_get_string (config_get_instance (), "LightDM", "sessions-directory");
897 case SESSION_TYPE_REMOTE:
898 sessions_dir = config_get_string (config_get_instance (), "LightDM", "remote-sessions-directory");
902 /* Load user preferences */
903 user = session_get_user (session);
907 session_name = user_get_xsession (user);
908 language = user_get_language (user);
912 session_name = seat_get_string_property (seat, "user-session");
914 user_set_xsession (session_get_user (session), session_name);
916 session_config = find_session_config (sessions_dir, session_name);
917 g_free (sessions_dir);
920 g_debug ("Can't find session '%s'", seat_get_string_property (seat, "user-session"));
924 session_set_session_type (session, session_config_get_session_type (session_config));
925 argv = get_session_argv (session_config, seat_get_string_property (seat, "session-wrapper"));
926 session_set_argv (session, argv);
928 session_set_env (session, "DESKTOP_SESSION", session_name);
929 session_set_env (session, "GDMSESSION", session_name);
930 if (language && language[0] != '\0')
932 session_set_env (session, "LANG", language);
933 session_set_env (session, "GDM_LANG", language);
936 g_object_unref (session_config);
938 /* If can re-use the display server, stop the greeter first */
939 display_server = session_get_display_server (SESSION (greeter));
940 if (can_share_display_server (seat, display_server) &&
941 strcmp (display_server_get_session_type (display_server), session_get_session_type (session)) == 0)
943 g_debug ("Stopping greeter; display server will be re-used for user session");
945 /* Run on the same display server after the greeter has stopped */
946 session_set_display_server (session, display_server);
948 /* Stop the greeter */
949 session_stop (SESSION (greeter));
953 /* Otherwise start a new display server for this session */
956 display_server = create_display_server (seat, session_get_session_type (session));
957 session_set_display_server (session, display_server);
958 if (!display_server_start (display_server))
960 g_debug ("Failed to start display server for new session");
969 create_greeter_session (Seat *seat)
971 gchar *sessions_dir, **argv;
972 SessionConfig *session_config;
973 Greeter *greeter_session;
975 const gchar *greeter_wrapper;
977 g_debug ("Creating greeter session");
979 sessions_dir = config_get_string (config_get_instance (), "LightDM", "greeters-directory");
980 session_config = find_session_config (sessions_dir, seat_get_string_property (seat, "greeter-session"));
981 g_free (sessions_dir);
985 argv = get_session_argv (session_config, NULL);
986 greeter_wrapper = seat_get_string_property (seat, "greeter-wrapper");
990 path = g_find_program_in_path (greeter_wrapper);
991 prepend_argv (&argv, path ? path : greeter_wrapper);
995 greeter_session = SEAT_GET_CLASS (seat)->create_greeter_session (seat);
996 session_set_session_type (SESSION (greeter_session), session_config_get_session_type (session_config));
997 seat->priv->sessions = g_list_append (seat->priv->sessions, SESSION (greeter_session));
998 g_signal_connect (greeter_session, "authentication-complete", G_CALLBACK (session_authentication_complete_cb), seat);
999 g_signal_connect (greeter_session, "stopped", G_CALLBACK (session_stopped_cb), seat);
1001 set_session_env (SESSION (greeter_session));
1003 session_set_pam_service (SESSION (greeter_session), GREETER_SERVICE);
1004 greeter_user = config_get_string (config_get_instance (), "LightDM", "greeter-user");
1005 session_set_username (SESSION (greeter_session), greeter_user);
1006 g_free (greeter_user);
1007 session_set_argv (SESSION (greeter_session), argv);
1010 greeter_set_pam_services (greeter_session, USER_SERVICE, AUTOLOGIN_SERVICE);
1011 g_signal_connect (greeter_session, "create-session", G_CALLBACK (greeter_create_session_cb), seat);
1012 g_signal_connect (greeter_session, "start-session", G_CALLBACK (greeter_start_session_cb), seat);
1014 /* Set hints to greeter */
1015 greeter_set_hint (greeter_session, "default-session", seat_get_string_property (seat, "user-session"));
1016 greeter_set_allow_guest (greeter_session, seat_get_allow_guest (seat));
1017 greeter_set_hint (greeter_session, "hide-users", seat_get_boolean_property (seat, "greeter-hide-users") ? "true" : "false");
1018 greeter_set_hint (greeter_session, "show-manual-login", seat_get_boolean_property (seat, "greeter-show-manual-login") ? "true" : "false");
1019 greeter_set_hint (greeter_session, "show-remote-login", seat_get_boolean_property (seat, "greeter-show-remote-login") ? "true" : "false");
1020 greeter_set_hint (greeter_session, "has-guest-account", seat_get_allow_guest (seat) && seat_get_boolean_property (seat, "greeter-allow-guest") ? "true" : "false");
1022 g_object_unref (session_config);
1024 return greeter_session;
1028 find_session_for_display_server (Seat *seat, DisplayServer *display_server)
1032 for (link = seat->priv->sessions; link; link = link->next)
1034 Session *session = link->data;
1035 if (session_get_display_server (session) == display_server && !session_get_is_stopping (session))
1043 display_server_ready_cb (DisplayServer *display_server, Seat *seat)
1045 const gchar *script;
1048 /* Run setup script */
1049 script = seat_get_string_property (seat, "display-setup-script");
1050 if (script && !run_script (seat, display_server, script, NULL))
1052 g_debug ("Stopping display server due to failed setup script");
1053 display_server_stop (display_server);
1057 /* Stop if don't need to run a session */
1058 if (!get_start_local_sessions (seat))
1061 emit_upstart_signal ("login-session-start");
1063 /* Start the session waiting for this display server */
1064 session = find_session_for_display_server (seat, display_server);
1067 if (session_get_is_authenticated (session))
1069 g_debug ("Display server ready, running session");
1070 run_session (seat, session);
1074 g_debug ("Display server ready, starting session authentication");
1075 start_session (seat, session);
1080 g_debug ("Stopping not required display server");
1081 display_server_stop (display_server);
1085 static DisplayServer *
1086 create_display_server (Seat *seat, const gchar *session_type)
1088 DisplayServer *display_server;
1090 g_debug ("Creating display server of type %s", session_type);
1092 display_server = SEAT_GET_CLASS (seat)->create_display_server (seat, session_type);
1093 if (!display_server)
1096 seat->priv->display_servers = g_list_append (seat->priv->display_servers, display_server);
1097 g_signal_connect (display_server, "ready", G_CALLBACK (display_server_ready_cb), seat);
1098 g_signal_connect (display_server, "stopped", G_CALLBACK (display_server_stopped_cb), seat);
1100 return display_server;
1104 find_greeter_session (Seat *seat)
1108 for (link = seat->priv->sessions; link; link = link->next)
1110 Session *session = link->data;
1111 if (!session_get_is_stopping (session) && IS_GREETER (session))
1112 return GREETER (session);
1119 seat_switch_to_greeter (Seat *seat)
1121 Greeter *greeter_session;
1122 DisplayServer *display_server;
1124 g_return_val_if_fail (seat != NULL, FALSE);
1126 if (!seat->priv->can_switch)
1129 /* Switch to greeter if one open (shouldn't be though) */
1130 greeter_session = find_greeter_session (seat);
1131 if (greeter_session)
1133 g_debug ("Switching to existing greeter");
1134 seat_set_active_session (seat, SESSION (greeter_session));
1138 greeter_session = create_greeter_session (seat);
1139 if (seat->priv->session_to_activate)
1140 g_object_unref (seat->priv->session_to_activate);
1141 seat->priv->session_to_activate = g_object_ref (greeter_session);
1143 display_server = create_display_server (seat, session_get_session_type (SESSION (greeter_session)));
1144 session_set_display_server (SESSION (greeter_session), display_server);
1145 if (!display_server_start (display_server))
1152 seat_switch_to_user (Seat *seat, const gchar *username, const gchar *session_name)
1155 DisplayServer *display_server;
1157 g_return_val_if_fail (seat != NULL, FALSE);
1158 g_return_val_if_fail (username != NULL, FALSE);
1160 if (!seat->priv->can_switch)
1163 g_debug ("Switching to user %s", username);
1165 session = find_user_session (seat, username);
1168 g_debug ("Switching to existing user session %s", username);
1169 seat_set_active_session (seat, session);
1173 session = create_user_session (seat, username);
1176 if (seat->priv->session_to_activate)
1177 g_object_unref (seat->priv->session_to_activate);
1178 seat->priv->session_to_activate = g_object_ref (session);
1179 session_set_pam_service (session, USER_SERVICE);
1181 display_server = create_display_server (seat, session_get_session_type (session));
1182 session_set_display_server (session, display_server);
1183 if (!display_server_start (display_server))
1190 find_guest_session (Seat *seat)
1194 for (link = seat->priv->sessions; link; link = link->next)
1196 Session *session = link->data;
1197 if (!session_get_is_stopping (session) && session_get_is_guest (session))
1205 seat_switch_to_guest (Seat *seat, const gchar *session_name)
1208 DisplayServer *display_server;
1210 g_return_val_if_fail (seat != NULL, FALSE);
1212 if (!seat->priv->can_switch || !seat_get_allow_guest (seat))
1215 /* Switch to session if one open */
1216 session = find_guest_session (seat);
1219 g_debug ("Switching to existing guest account %s", session_get_username (session));
1220 seat_set_active_session (seat, session);
1224 session = create_guest_session (seat);
1228 display_server = create_display_server (seat, session_get_session_type (session));
1229 if (!display_server_start (display_server))
1232 if (seat->priv->session_to_activate)
1233 g_object_unref (seat->priv->session_to_activate);
1234 seat->priv->session_to_activate = g_object_ref (session);
1235 session_set_pam_service (session, AUTOLOGIN_SERVICE);
1236 session_set_display_server (session, display_server);
1242 seat_lock (Seat *seat, const gchar *username)
1244 Greeter *greeter_session;
1245 DisplayServer *display_server;
1247 g_return_val_if_fail (seat != NULL, FALSE);
1249 if (!seat->priv->can_switch)
1252 g_debug ("Locking seat");
1254 /* Switch to greeter if one open (shouldn't be though) */
1255 greeter_session = find_greeter_session (seat);
1256 if (greeter_session)
1258 g_debug ("Switching to existing greeter");
1259 seat_set_active_session (seat, SESSION (greeter_session));
1263 greeter_session = create_greeter_session (seat);
1264 if (!greeter_session)
1267 display_server = create_display_server (seat, session_get_session_type (SESSION (greeter_session)));
1268 if (!display_server_start (display_server))
1271 if (seat->priv->session_to_activate)
1272 g_object_unref (seat->priv->session_to_activate);
1273 seat->priv->session_to_activate = g_object_ref (greeter_session);
1274 greeter_set_hint (greeter_session, "lock-screen", "true");
1276 greeter_set_hint (greeter_session, "select-user", username);
1277 session_set_display_server (SESSION (greeter_session), display_server);
1283 seat_stop (Seat *seat)
1285 g_return_if_fail (seat != NULL);
1287 if (seat->priv->stopping)
1290 g_debug ("Stopping seat");
1291 seat->priv->stopping = TRUE;
1292 SEAT_GET_CLASS (seat)->stop (seat);
1296 seat_get_is_stopping (Seat *seat)
1298 g_return_val_if_fail (seat != NULL, FALSE);
1299 return seat->priv->stopping;
1303 seat_real_get_start_local_sessions (Seat *seat)
1309 seat_real_setup (Seat *seat)
1314 seat_real_start (Seat *seat)
1316 const gchar *autologin_username;
1317 int autologin_timeout;
1318 gboolean autologin_guest;
1319 gboolean autologin_in_background;
1320 Session *session = NULL, *background_session = NULL;
1322 g_debug ("Starting seat");
1324 /* If this display server doesn't have a session running on it, just start it */
1325 if (!get_start_local_sessions (seat))
1327 DisplayServer *display_server;
1328 display_server = create_display_server (seat, "x"); // FIXME: Not necessarily an X seat, but not sure what to put here
1329 return display_server_start (display_server);
1332 /* Get autologin settings */
1333 autologin_username = seat_get_string_property (seat, "autologin-user");
1334 if (g_strcmp0 (autologin_username, "") == 0)
1335 autologin_username = NULL;
1336 autologin_timeout = seat_get_integer_property (seat, "autologin-user-timeout");
1337 autologin_guest = seat_get_boolean_property (seat, "autologin-guest");
1338 autologin_in_background = seat_get_boolean_property (seat, "autologin-in-background");
1340 /* Autologin if configured */
1341 if (autologin_timeout == 0 || autologin_in_background)
1343 if (autologin_guest)
1344 session = create_guest_session (seat);
1345 else if (autologin_username != NULL)
1346 session = create_user_session (seat, autologin_username);
1349 session_set_pam_service (session, AUTOLOGIN_SERVICE);
1351 /* Load in background if required */
1352 if (autologin_in_background && session)
1354 background_session = session;
1360 DisplayServer *display_server;
1362 if (seat->priv->session_to_activate)
1363 g_object_unref (seat->priv->session_to_activate);
1364 seat->priv->session_to_activate = g_object_ref (session);
1366 display_server = create_display_server (seat, session_get_session_type (session));
1367 session_set_display_server (session, display_server);
1368 if (!display_server || !display_server_start (display_server))
1370 g_debug ("Can't create display server for automatic login");
1371 session_stop (session);
1373 display_server_stop (display_server);
1379 /* Fallback to a greeter */
1382 Greeter *greeter_session;
1383 DisplayServer *display_server;
1385 greeter_session = create_greeter_session (seat);
1386 if (!greeter_session)
1388 g_debug ("Failed to create greeter session");
1392 if (seat->priv->session_to_activate)
1393 g_object_unref (seat->priv->session_to_activate);
1394 seat->priv->session_to_activate = g_object_ref (greeter_session);
1395 session = SESSION (greeter_session);
1397 if (autologin_timeout)
1401 value = g_strdup_printf ("%d", autologin_timeout);
1402 greeter_set_hint (greeter_session, "autologin-timeout", value);
1404 if (autologin_username)
1405 greeter_set_hint (greeter_session, "autologin-user", autologin_username);
1406 if (autologin_guest)
1407 greeter_set_hint (greeter_session, "autologin-guest", "true");
1410 display_server = create_display_server (seat, session_get_session_type (session));
1411 session_set_display_server (session, display_server);
1412 if (!display_server || !display_server_start (display_server))
1414 g_debug ("Can't create display server for greeter");
1415 session_stop (session);
1417 display_server_stop (display_server);
1422 /* Fail if can't start a session */
1429 /* Start background session */
1430 if (background_session)
1432 DisplayServer *background_display_server;
1434 background_display_server = create_display_server (seat, session_get_session_type (background_session));
1435 session_set_display_server (background_session, background_display_server);
1436 if (!display_server_start (background_display_server))
1437 g_warning ("Failed to start display server for background session");
1440 seat->priv->started = TRUE;
1445 seat_real_create_greeter_session (Seat *seat)
1447 return greeter_new ();
1451 seat_real_create_session (Seat *seat)
1453 return session_new ();
1457 seat_real_set_active_session (Seat *seat, Session *session)
1462 seat_real_get_active_session (Seat *seat)
1468 seat_real_stop (Seat *seat)
1472 check_stopped (seat);
1473 if (seat->priv->stopped)
1476 /* Stop all the display servers and sessions on the seat. Copy the list as
1477 * it might be modified if a display server / session stops during this loop */
1478 list = g_list_copy (seat->priv->display_servers);
1479 for (link = list; link; link = link->next)
1480 g_object_ref (link->data);
1481 for (link = list; link; link = link->next)
1483 DisplayServer *display_server = link->data;
1484 if (!display_server_get_is_stopping (display_server))
1486 g_debug ("Stopping display server");
1487 display_server_stop (display_server);
1490 g_list_free_full (list, g_object_unref);
1491 list = g_list_copy (seat->priv->sessions);
1492 for (link = list; link; link = link->next)
1493 g_object_ref (link->data);
1494 for (link = list; link; link = link->next)
1496 Session *session = link->data;
1497 if (!session_get_is_stopping (session))
1499 g_debug ("Stopping session");
1500 session_stop (session);
1503 g_list_free_full (list, g_object_unref);
1507 seat_init (Seat *seat)
1509 seat->priv = G_TYPE_INSTANCE_GET_PRIVATE (seat, SEAT_TYPE, SeatPrivate);
1510 seat->priv->properties = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
1511 seat->priv->share_display_server = TRUE;
1515 seat_finalize (GObject *object)
1520 self = SEAT (object);
1522 g_hash_table_unref (self->priv->properties);
1523 for (link = self->priv->display_servers; link; link = link->next)
1525 DisplayServer *display_server = link->data;
1526 g_signal_handlers_disconnect_matched (display_server, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, self);
1528 g_list_free_full (self->priv->display_servers, g_object_unref);
1529 for (link = self->priv->sessions; link; link = link->next)
1531 Session *session = link->data;
1532 g_signal_handlers_disconnect_matched (session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, self);
1534 g_list_free_full (self->priv->sessions, g_object_unref);
1535 if (self->priv->session_to_activate)
1536 g_object_unref (self->priv->session_to_activate);
1538 G_OBJECT_CLASS (seat_parent_class)->finalize (object);
1542 seat_class_init (SeatClass *klass)
1544 GObjectClass *object_class = G_OBJECT_CLASS (klass);
1546 klass->get_start_local_sessions = seat_real_get_start_local_sessions;
1547 klass->setup = seat_real_setup;
1548 klass->start = seat_real_start;
1549 klass->create_greeter_session = seat_real_create_greeter_session;
1550 klass->create_session = seat_real_create_session;
1551 klass->set_active_session = seat_real_set_active_session;
1552 klass->get_active_session = seat_real_get_active_session;
1553 klass->run_script = seat_real_run_script;
1554 klass->stop = seat_real_stop;
1556 object_class->finalize = seat_finalize;
1558 g_type_class_add_private (klass, sizeof (SeatPrivate));
1560 signals[SESSION_ADDED] =
1561 g_signal_new ("session-added",
1562 G_TYPE_FROM_CLASS (klass),
1564 G_STRUCT_OFFSET (SeatClass, session_added),
1567 G_TYPE_NONE, 1, SESSION_TYPE);
1568 signals[RUNNING_USER_SESSION] =
1569 g_signal_new ("running-user-session",
1570 G_TYPE_FROM_CLASS (klass),
1572 G_STRUCT_OFFSET (SeatClass, running_user_session),
1575 G_TYPE_NONE, 1, SESSION_TYPE);
1576 signals[SESSION_REMOVED] =
1577 g_signal_new ("session-removed",
1578 G_TYPE_FROM_CLASS (klass),
1580 G_STRUCT_OFFSET (SeatClass, session_removed),
1583 G_TYPE_NONE, 1, SESSION_TYPE);
1585 g_signal_new ("stopped",
1586 G_TYPE_FROM_CLASS (klass),
1588 G_STRUCT_OFFSET (SeatClass, stopped),