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 if stopping this seat (waiting for displays to stop) */
58 /* PAM services to use */
59 #define GREETER_SERVICE "lightdm-greeter"
60 #define USER_SERVICE "lightdm"
61 #define AUTOLOGIN_SERVICE "lightdm-autologin"
63 G_DEFINE_TYPE (Seat, seat, G_TYPE_OBJECT);
70 static GHashTable *seat_modules = NULL;
72 // FIXME: Make a get_display_server() that re-uses display servers if supported
73 static DisplayServer *create_display_server (Seat *seat);
74 static Greeter *create_greeter_session (Seat *seat);
75 static void start_session (Seat *seat, Session *session);
78 seat_register_module (const gchar *name, GType type)
83 seat_modules = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
85 g_debug ("Registered seat module %s", name);
87 module = g_malloc0 (sizeof (SeatModule));
88 module->name = g_strdup (name);
90 g_hash_table_insert (seat_modules, g_strdup (name), module);
94 seat_new (const gchar *module_name)
99 g_return_val_if_fail (module_name != NULL, NULL);
102 m = g_hash_table_lookup (seat_modules, module_name);
106 seat = g_object_new (m->type, NULL);
112 seat_set_property (Seat *seat, const gchar *name, const gchar *value)
114 g_return_if_fail (seat != NULL);
115 g_hash_table_insert (seat->priv->properties, g_strdup (name), g_strdup (value));
119 seat_get_string_property (Seat *seat, const gchar *name)
121 g_return_val_if_fail (seat != NULL, NULL);
122 return g_hash_table_lookup (seat->priv->properties, name);
126 seat_get_boolean_property (Seat *seat, const gchar *name)
128 return g_strcmp0 (seat_get_string_property (seat, name), "true") == 0;
132 seat_get_integer_property (Seat *seat, const gchar *name)
136 value = seat_get_string_property (seat, name);
137 return value ? atoi (value) : 0;
141 seat_set_can_switch (Seat *seat, gboolean can_switch)
143 g_return_if_fail (seat != NULL);
145 seat->priv->can_switch = can_switch;
149 seat_set_share_display_server (Seat *seat, gboolean share_display_server)
151 g_return_if_fail (seat != NULL);
153 seat->priv->share_display_server = share_display_server;
157 seat_start (Seat *seat)
159 g_return_val_if_fail (seat != NULL, FALSE);
161 SEAT_GET_CLASS (seat)->setup (seat);
162 return SEAT_GET_CLASS (seat)->start (seat);
166 seat_get_sessions (Seat *seat)
168 g_return_val_if_fail (seat != NULL, NULL);
169 return seat->priv->sessions;
173 seat_set_active_session (Seat *seat, Session *session)
177 g_return_if_fail (seat != NULL);
179 SEAT_GET_CLASS (seat)->set_active_session (seat, session);
181 /* Stop any greeters */
182 for (link = seat->priv->sessions; link; link = link->next)
184 Session *s = link->data;
186 if (s == session || session_get_is_stopping (s))
191 g_debug ("Stopping greeter");
198 seat_get_active_session (Seat *seat)
200 g_return_val_if_fail (seat != NULL, NULL);
201 return SEAT_GET_CLASS (seat)->get_active_session (seat);
205 seat_get_can_switch (Seat *seat)
207 g_return_val_if_fail (seat != NULL, FALSE);
208 return seat->priv->can_switch;
212 seat_get_allow_guest (Seat *seat)
214 g_return_val_if_fail (seat != NULL, FALSE);
215 return seat_get_boolean_property (seat, "allow-guest") && guest_account_is_installed ();
219 run_script (Seat *seat, DisplayServer *display_server, const gchar *script_name, User *user)
222 gboolean result = FALSE;
224 script = process_new ();
226 process_set_command (script, script_name);
228 /* Set POSIX variables */
229 process_set_clear_environment (script, TRUE);
230 process_set_env (script, "SHELL", "/bin/sh");
232 /* Variables required for regression tests */
233 if (g_getenv ("LIGHTDM_TEST_ROOT"))
235 process_set_env (script, "LIGHTDM_TEST_ROOT", g_getenv ("LIGHTDM_TEST_ROOT"));
236 process_set_env (script, "LD_PRELOAD", g_getenv ("LD_PRELOAD"));
237 process_set_env (script, "LD_LIBRARY_PATH", g_getenv ("LD_LIBRARY_PATH"));
238 process_set_env (script, "PATH", g_getenv ("PATH"));
241 process_set_env (script, "PATH", "/usr/local/bin:/usr/bin:/bin");
245 process_set_env (script, "USER", user_get_name (user));
246 process_set_env (script, "LOGNAME", user_get_name (user));
247 process_set_env (script, "HOME", user_get_home_directory (user));
250 process_set_env (script, "HOME", "/");
252 SEAT_GET_CLASS (seat)->run_script (seat, display_server, script);
254 if (process_start (script, TRUE))
258 exit_status = process_get_exit_status (script);
259 if (WIFEXITED (exit_status))
261 g_debug ("Exit status of %s: %d", script_name, WEXITSTATUS (exit_status));
262 result = WEXITSTATUS (exit_status) == EXIT_SUCCESS;
266 g_object_unref (script);
272 seat_real_run_script (Seat *seat, DisplayServer *display_server, Process *process)
277 emit_upstart_signal (const gchar *signal)
279 g_return_if_fail (signal != NULL);
280 g_return_if_fail (signal[0] != 0);
285 gchar *cmd = g_strdup_printf ("initctl -q emit %s DISPLAY_MANAGER=lightdm", signal);
286 g_spawn_command_line_async (cmd, NULL); /* OK if it fails, probably not installed */
291 check_stopped (Seat *seat)
293 if (seat->priv->stopping &&
294 !seat->priv->stopped &&
295 g_list_length (seat->priv->display_servers) == 0 &&
296 g_list_length (seat->priv->sessions) == 0)
298 seat->priv->stopped = TRUE;
299 g_debug ("Seat stopped");
300 g_signal_emit (seat, signals[STOPPED], 0);
305 get_start_local_sessions (Seat *seat)
307 return SEAT_GET_CLASS (seat)->get_start_local_sessions (seat);
311 display_server_stopped_cb (DisplayServer *display_server, Seat *seat)
314 Session *active_session;
316 g_debug ("Display server stopped");
318 g_signal_handlers_disconnect_matched (display_server, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, seat);
319 seat->priv->display_servers = g_list_remove (seat->priv->display_servers, display_server);
321 if (seat->priv->stopping)
323 check_stopped (seat);
324 g_object_unref (display_server);
328 /* Stop all sessions on this display server */
329 list = g_list_copy (seat->priv->sessions);
330 for (link = list; link; link = link->next)
331 g_object_ref (link->data);
332 for (link = list; link; link = link->next)
334 Session *session = link->data;
336 if (session_get_display_server (session) != display_server || session_get_is_stopping (session))
339 /* Stop seat if this is the only display server and it failed to start a greeter */
340 if (IS_GREETER (session) &&
341 !session_get_is_started (session) &&
342 g_list_length (seat->priv->display_servers) == 0)
344 g_debug ("Stopping seat, greeter display server failed to start");
348 g_debug ("Stopping session");
349 session_stop (session);
351 g_list_free_full (list, g_object_unref);
353 if (!seat->priv->stopping && get_start_local_sessions (seat))
355 /* If we were the active session, switch to a greeter */
356 active_session = seat_get_active_session (seat);
357 if (!active_session || session_get_display_server (active_session) == display_server)
359 g_debug ("Active display server stopped, starting greeter");
360 seat_switch_to_greeter (seat);
364 g_object_unref (display_server);
368 can_share_display_server (Seat *seat, DisplayServer *display_server)
370 return seat->priv->share_display_server && display_server_get_can_share (display_server);
374 switch_to_greeter_from_failed_session (Seat *seat, Session *session)
376 Greeter *greeter_session;
378 greeter_session = create_greeter_session (seat);
379 if (session_get_is_guest (session))
380 greeter_set_hint (greeter_session, "select-guest", "true");
382 greeter_set_hint (greeter_session, "select-user", session_get_username (session));
383 if (seat->priv->session_to_activate)
384 g_object_unref (seat->priv->session_to_activate);
385 seat->priv->session_to_activate = g_object_ref (greeter_session);
387 if (can_share_display_server (seat, session_get_display_server (session)))
388 session_set_display_server (SESSION (greeter_session), session_get_display_server (session));
391 DisplayServer *display_server;
393 display_server = create_display_server (seat);
394 if (!display_server_start (display_server))
396 g_debug ("Failed to start display server for greeter");
400 session_set_display_server (session, display_server);
403 start_session (seat, SESSION (greeter_session));
405 /* Stop failed session */
406 session_stop (session);
410 start_session (Seat *seat, Session *session)
412 /* Use system location for greeter log file */
413 if (IS_GREETER (session))
415 gchar *log_dir, *filename, *log_filename;
417 log_dir = config_get_string (config_get_instance (), "LightDM", "log-directory");
418 filename = g_strdup_printf ("%s-greeter.log", display_server_get_name (session_get_display_server (session)));
419 log_filename = g_build_filename (log_dir, filename, NULL);
422 session_set_log_file (session, log_filename);
423 g_free (log_filename);
426 if (session_start (session))
429 if (IS_GREETER (session))
431 g_debug ("Failed to start greeter");
432 display_server_stop (session_get_display_server (session));
436 g_debug ("Failed to start session, starting greeter");
437 switch_to_greeter_from_failed_session (seat, session);
441 run_session (Seat *seat, Session *session)
445 if (IS_GREETER (session))
446 script = seat_get_string_property (seat, "greeter-setup-script");
448 script = seat_get_string_property (seat, "session-setup-script");
449 if (script && !run_script (seat, session_get_display_server (session), script, NULL))
451 g_debug ("Switching to greeter due to failed setup script");
452 switch_to_greeter_from_failed_session (seat, session);
456 if (!IS_GREETER (session))
457 g_signal_emit (seat, signals[RUNNING_USER_SESSION], 0, session);
459 session_run (session);
461 // FIXME: Wait until the session is ready
463 if (session == seat->priv->session_to_activate)
465 seat_set_active_session (seat, session);
466 g_object_unref (seat->priv->session_to_activate);
467 seat->priv->session_to_activate = NULL;
472 session_authentication_complete_cb (Session *session, Seat *seat)
474 if (session_get_is_authenticated (session))
476 g_debug ("Session authenticated, running command");
477 run_session (seat, session);
479 else if (!IS_GREETER (session))
481 g_debug ("Switching to greeter due to failed authentication");
482 switch_to_greeter_from_failed_session (seat, session);
486 g_debug ("Stopping session that failed authentication");
487 session_stop (session);
492 session_stopped_cb (Session *session, Seat *seat)
494 DisplayServer *display_server;
496 g_debug ("Session stopped");
498 display_server = session_get_display_server (session);
501 if (!IS_GREETER (session))
504 script = seat_get_string_property (seat, "session-cleanup-script");
506 run_script (seat, display_server, script, session_get_user (session));
509 g_signal_handlers_disconnect_matched (session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, seat);
510 seat->priv->sessions = g_list_remove (seat->priv->sessions, session);
512 /* We were waiting for this session, but it didn't start :( */
513 // FIXME: Start a greeter on this?
514 if (session == seat->priv->session_to_activate)
516 g_object_unref (seat->priv->session_to_activate);
517 seat->priv->session_to_activate = NULL;
520 if (seat->priv->stopping)
522 check_stopped (seat);
523 g_object_unref (session);
527 /* If this is the greeter session then re-use this display server */
528 if (IS_GREETER (session) &&
529 can_share_display_server (seat, display_server) &&
530 greeter_get_start_session (GREETER (session)))
534 for (link = seat->priv->sessions; link; link = link->next)
536 Session *s = link->data;
538 /* Skip this session and sessions on other display servers */
539 if (s == session || session_get_display_server (s) != display_server || session_get_is_stopping (s))
542 if (session_get_is_authenticated (s))
544 g_debug ("Greeter stopped, running session");
545 run_session (seat, s);
549 g_debug ("Greeter stopped, starting session authentication");
550 start_session (seat, s);
555 /* If this is the greeter and nothing else is running then stop the seat */
556 else if (IS_GREETER (session) &&
557 !greeter_get_start_session (GREETER (session)) &&
558 g_list_length (seat->priv->display_servers) == 1 &&
559 g_list_nth_data (seat->priv->display_servers, 0) == display_server)
561 g_debug ("Stopping seat, failed to start a greeter");
564 /* If we were the active session, switch to a greeter */
565 else if (!IS_GREETER (session) && session == seat_get_active_session (seat))
567 g_debug ("Active session stopped, starting greeter");
568 seat_switch_to_greeter (seat);
571 /* Stop the display server if no-longer required */
572 if (display_server && !display_server_get_is_stopping (display_server))
577 for (link = seat->priv->sessions; link; link = link->next)
579 Session *s = link->data;
582 if (session_get_display_server (s) == display_server)
587 g_debug ("Stopping display server, no sessions require it");
588 display_server_stop (display_server);
592 g_signal_emit (seat, signals[SESSION_REMOVED], 0, session);
593 g_object_unref (session);
597 set_session_env (Session *session)
599 /* Connect using the session bus */
602 if (g_getenv ("DBUS_SESSION_BUS_ADDRESS"))
603 session_set_env (session, "DBUS_SESSION_BUS_ADDRESS", g_getenv ("DBUS_SESSION_BUS_ADDRESS"));
604 session_set_env (session, "LDM_BUS", "SESSION");
605 if (g_getenv ("LD_PRELOAD"))
606 session_set_env (session, "LD_PRELOAD", g_getenv ("LD_PRELOAD"));
607 if (g_getenv ("LD_LIBRARY_PATH"))
608 session_set_env (session, "LD_LIBRARY_PATH", g_getenv ("LD_LIBRARY_PATH"));
609 if (g_getenv ("PATH"))
610 session_set_env (session, "PATH", g_getenv ("PATH"));
613 /* Variables required for regression tests */
614 if (g_getenv ("LIGHTDM_TEST_ROOT"))
616 session_set_env (session, "LIGHTDM_TEST_ROOT", g_getenv ("LIGHTDM_TEST_ROOT"));
617 session_set_env (session, "DBUS_SYSTEM_BUS_ADDRESS", g_getenv ("DBUS_SYSTEM_BUS_ADDRESS"));
618 session_set_env (session, "DBUS_SESSION_BUS_ADDRESS", g_getenv ("DBUS_SESSION_BUS_ADDRESS"));
619 session_set_env (session, "LD_PRELOAD", g_getenv ("LD_PRELOAD"));
620 session_set_env (session, "LD_LIBRARY_PATH", g_getenv ("LD_LIBRARY_PATH"));
621 session_set_env (session, "GI_TYPELIB_PATH", g_getenv ("GI_TYPELIB_PATH"));
626 create_session (Seat *seat, gboolean autostart)
630 session = SEAT_GET_CLASS (seat)->create_session (seat);
631 seat->priv->sessions = g_list_append (seat->priv->sessions, session);
633 g_signal_connect (session, "authentication-complete", G_CALLBACK (session_authentication_complete_cb), seat);
634 g_signal_connect (session, "stopped", G_CALLBACK (session_stopped_cb), seat);
636 set_session_env (session);
638 g_signal_emit (seat, signals[SESSION_ADDED], 0, session);
644 get_session_argv (SessionConfig *session_config, const gchar *session_wrapper)
649 GError *error = NULL;
651 /* If configured, run sessions through a wrapper */
654 argv = g_malloc (sizeof (gchar *) * 3);
655 path = g_find_program_in_path (session_wrapper);
656 argv[0] = path ? path : g_strdup (session_wrapper);
657 argv[1] = g_strdup (session_config_get_command (session_config));
662 /* Split command into an array listing and make command absolute */
663 result = g_shell_parse_argv (session_config_get_command (session_config), &argc, &argv, &error);
665 g_debug ("Invalid session command '%s': %s", session_config_get_command (session_config), error->message);
666 g_clear_error (&error);
669 path = g_find_program_in_path (argv[0]);
679 static SessionConfig *
680 find_session_config (const gchar *sessions_dir, const gchar *session_name)
683 SessionConfig *session_config = NULL;
685 GError *error = NULL;
687 g_return_val_if_fail (sessions_dir != NULL, NULL);
688 g_return_val_if_fail (session_name != NULL, NULL);
690 dirs = g_strsplit (sessions_dir, ":", -1);
691 for (i = 0; dirs[i]; i++)
693 gchar *filename, *path;
695 filename = g_strdup_printf ("%s.desktop", session_name);
696 path = g_build_filename (dirs[i], filename, NULL);
698 session_config = session_config_new_from_file (path, &error);
703 if (dirs[i+1] == NULL)
704 g_debug ("Failed to find session configuration %s", session_name);
705 g_clear_error (&error);
709 return session_config;
713 create_user_session (Seat *seat, const gchar *username)
717 const gchar *session_name, *language;
718 SessionConfig *session_config;
719 Session *session = NULL;
721 g_debug ("Creating user session");
723 /* Load user preferences */
724 user = accounts_get_user_by_name (username);
727 g_debug ("Can't login unknown user '%s'", username);
730 session_name = user_get_xsession (user);
731 language = user_get_language (user);
734 session_name = seat_get_string_property (seat, "user-session");
735 sessions_dir = config_get_string (config_get_instance (), "LightDM", "sessions-directory");
736 session_config = find_session_config (sessions_dir, session_name);
737 g_free (sessions_dir);
742 session = create_session (seat, TRUE);
743 session_set_env (session, "DESKTOP_SESSION", session_name);
744 session_set_env (session, "GDMSESSION", session_name);
745 if (language && language[0] != '\0')
747 session_set_env (session, "LANG", language);
748 session_set_env (session, "GDM_LANG", language);
750 session_set_pam_service (session, AUTOLOGIN_SERVICE);
751 session_set_username (session, username);
752 session_set_do_authenticate (session, TRUE);
753 argv = get_session_argv (session_config, seat_get_string_property (seat, "session-wrapper"));
754 session_set_argv (session, argv);
757 g_object_unref (session_config);
760 g_debug ("Can't find session '%s'", seat_get_string_property (seat, "user-session"));
763 g_object_unref (user);
769 create_guest_session (Seat *seat)
771 gchar *sessions_dir, **argv;
772 SessionConfig *session_config;
775 sessions_dir = config_get_string (config_get_instance (), "LightDM", "sessions-directory");
776 session_config = find_session_config (sessions_dir, seat_get_string_property (seat, "user-session"));
777 g_free (sessions_dir);
780 g_debug ("Can't find session '%s'", seat_get_string_property (seat, "user-session"));
784 session = create_session (seat, TRUE);
785 session_set_do_authenticate (session, TRUE);
786 session_set_is_guest (session, TRUE);
787 argv = get_session_argv (session_config, seat_get_string_property (seat, "session-wrapper"));
788 g_object_unref (session_config);
789 session_set_argv (session, argv);
796 greeter_create_session_cb (Greeter *greeter, Seat *seat)
800 session = create_session (seat, FALSE);
801 session_set_display_server (session, session_get_display_server (SESSION (greeter)));
803 return g_object_ref (session);
807 prepend_argv (gchar ***argv, const gchar *value)
809 gchar **old_argv, **new_argv;
813 new_argv = g_malloc (sizeof (gchar *) * (g_strv_length (*argv) + 2));
814 new_argv[0] = g_strdup (value);
815 for (i = 0; old_argv[i]; i++)
816 new_argv[i + 1] = old_argv[i];
817 new_argv[i + 1] = NULL;
824 find_user_session (Seat *seat, const gchar *username)
831 for (link = seat->priv->sessions; link; link = link->next)
833 Session *session = link->data;
835 if (!session_get_is_stopping (session) && strcmp (session_get_username (session), username) == 0)
843 greeter_start_session_cb (Greeter *greeter, SessionType type, const gchar *session_name, Seat *seat)
845 Session *session, *existing_session;
846 const gchar *username, *language = NULL;
847 SessionConfig *session_config;
849 gchar *sessions_dir = NULL;
851 DisplayServer *display_server;
853 /* Get the session to use */
854 if (greeter_get_guest_authenticated (greeter))
856 session = create_guest_session (seat);
859 session_set_pam_service (session, AUTOLOGIN_SERVICE);
862 session = greeter_get_authentication_session (greeter);
864 /* Switch to this session when it is ready */
865 if (seat->priv->session_to_activate)
866 g_object_unref (seat->priv->session_to_activate);
867 seat->priv->session_to_activate = g_object_ref (session);
869 /* Return to existing session if it is open */
870 username = session_get_username (session);
871 existing_session = find_user_session (seat, username);
872 if (existing_session && session != existing_session)
874 g_debug ("Returning to existing user session %s", username);
875 session_stop (session);
876 seat_set_active_session (seat, existing_session);
880 /* Get session command to run */
883 case SESSION_TYPE_LOCAL:
884 sessions_dir = config_get_string (config_get_instance (), "LightDM", "sessions-directory");
886 case SESSION_TYPE_REMOTE:
887 sessions_dir = config_get_string (config_get_instance (), "LightDM", "remote-sessions-directory");
891 /* Load user preferences */
892 user = session_get_user (session);
896 session_name = user_get_xsession (user);
897 language = user_get_language (user);
901 session_name = seat_get_string_property (seat, "user-session");
903 user_set_xsession (session_get_user (session), session_name);
905 session_config = find_session_config (sessions_dir, session_name);
906 g_free (sessions_dir);
909 g_debug ("Can't find session '%s'", seat_get_string_property (seat, "user-session"));
913 argv = get_session_argv (session_config, seat_get_string_property (seat, "session-wrapper"));
914 session_set_argv (session, argv);
916 session_set_env (session, "DESKTOP_SESSION", session_name);
917 session_set_env (session, "GDMSESSION", session_name);
918 if (language && language[0] != '\0')
920 session_set_env (session, "LANG", language);
921 session_set_env (session, "GDM_LANG", language);
924 g_object_unref (session_config);
926 /* If can re-use the display server, stop the greeter first */
927 display_server = session_get_display_server (SESSION (greeter));
928 if (can_share_display_server (seat, display_server))
930 g_debug ("Stopping greeter; display server will be re-used for user session");
932 /* Run on the same display server after the greeter has stopped */
933 session_set_display_server (session, display_server);
935 /* Stop the greeter */
936 session_stop (SESSION (greeter));
940 /* Otherwise start a new display server for this session */
943 display_server = create_display_server (seat);
944 session_set_display_server (session, display_server);
945 if (!display_server_start (display_server))
947 g_debug ("Failed to start display server for new session");
956 create_greeter_session (Seat *seat)
958 gchar *sessions_dir, **argv;
959 SessionConfig *session_config;
960 Greeter *greeter_session;
962 const gchar *greeter_wrapper;
964 g_debug ("Creating greeter session");
966 sessions_dir = config_get_string (config_get_instance (), "LightDM", "greeters-directory");
967 session_config = find_session_config (sessions_dir, seat_get_string_property (seat, "greeter-session"));
968 g_free (sessions_dir);
972 argv = get_session_argv (session_config, NULL);
973 greeter_wrapper = seat_get_string_property (seat, "greeter-wrapper");
977 path = g_find_program_in_path (greeter_wrapper);
978 prepend_argv (&argv, path ? path : greeter_wrapper);
982 greeter_session = SEAT_GET_CLASS (seat)->create_greeter_session (seat);
983 seat->priv->sessions = g_list_append (seat->priv->sessions, SESSION (greeter_session));
984 g_signal_connect (greeter_session, "authentication-complete", G_CALLBACK (session_authentication_complete_cb), seat);
985 g_signal_connect (greeter_session, "stopped", G_CALLBACK (session_stopped_cb), seat);
987 set_session_env (SESSION (greeter_session));
989 session_set_pam_service (SESSION (greeter_session), GREETER_SERVICE);
990 greeter_user = config_get_string (config_get_instance (), "LightDM", "greeter-user");
991 session_set_username (SESSION (greeter_session), greeter_user);
992 g_free (greeter_user);
993 session_set_argv (SESSION (greeter_session), argv);
996 greeter_set_pam_services (greeter_session, USER_SERVICE, AUTOLOGIN_SERVICE);
997 g_signal_connect (greeter_session, "create-session", G_CALLBACK (greeter_create_session_cb), seat);
998 g_signal_connect (greeter_session, "start-session", G_CALLBACK (greeter_start_session_cb), seat);
1000 /* Set hints to greeter */
1001 greeter_set_hint (greeter_session, "default-session", seat_get_string_property (seat, "user-session"));
1002 greeter_set_allow_guest (greeter_session, seat_get_allow_guest (seat));
1003 greeter_set_hint (greeter_session, "hide-users", seat_get_boolean_property (seat, "greeter-hide-users") ? "true" : "false");
1004 greeter_set_hint (greeter_session, "show-manual-login", seat_get_boolean_property (seat, "greeter-show-manual-login") ? "true" : "false");
1005 greeter_set_hint (greeter_session, "show-remote-login", seat_get_boolean_property (seat, "greeter-show-remote-login") ? "true" : "false");
1006 greeter_set_hint (greeter_session, "has-guest-account", seat_get_allow_guest (seat) && seat_get_boolean_property (seat, "greeter-allow-guest") ? "true" : "false");
1008 g_object_unref (session_config);
1010 return greeter_session;
1014 find_session_for_display_server (Seat *seat, DisplayServer *display_server)
1018 for (link = seat->priv->sessions; link; link = link->next)
1020 Session *session = link->data;
1021 if (session_get_display_server (session) == display_server && !session_get_is_stopping (session))
1029 display_server_ready_cb (DisplayServer *display_server, Seat *seat)
1031 const gchar *script;
1034 /* Run setup script */
1035 script = seat_get_string_property (seat, "display-setup-script");
1036 if (script && !run_script (seat, display_server, script, NULL))
1038 g_debug ("Stopping display server due to failed setup script");
1039 display_server_stop (display_server);
1043 /* Stop if don't need to run a session */
1044 if (!get_start_local_sessions (seat))
1047 emit_upstart_signal ("login-session-start");
1049 /* Start the session waiting for this display server */
1050 session = find_session_for_display_server (seat, display_server);
1053 if (session_get_is_authenticated (session))
1055 g_debug ("Display server ready, running session");
1056 run_session (seat, session);
1060 g_debug ("Display server ready, starting session authentication");
1061 start_session (seat, session);
1066 g_debug ("Stopping not required display server");
1067 display_server_stop (display_server);
1071 static DisplayServer *
1072 create_display_server (Seat *seat)
1074 DisplayServer *display_server;
1076 g_debug ("Creating display server");
1078 display_server = SEAT_GET_CLASS (seat)->create_display_server (seat);
1079 seat->priv->display_servers = g_list_append (seat->priv->display_servers, display_server);
1080 g_signal_connect (display_server, "ready", G_CALLBACK (display_server_ready_cb), seat);
1081 g_signal_connect (display_server, "stopped", G_CALLBACK (display_server_stopped_cb), seat);
1083 return display_server;
1087 find_greeter_session (Seat *seat)
1091 for (link = seat->priv->sessions; link; link = link->next)
1093 Session *session = link->data;
1094 if (!session_get_is_stopping (session) && IS_GREETER (session))
1095 return GREETER (session);
1102 seat_switch_to_greeter (Seat *seat)
1104 Greeter *greeter_session;
1105 DisplayServer *display_server;
1107 g_return_val_if_fail (seat != NULL, FALSE);
1109 if (!seat->priv->can_switch)
1112 /* Switch to greeter if one open (shouldn't be though) */
1113 greeter_session = find_greeter_session (seat);
1114 if (greeter_session)
1116 g_debug ("Switching to existing greeter");
1117 seat_set_active_session (seat, SESSION (greeter_session));
1121 greeter_session = create_greeter_session (seat);
1122 if (seat->priv->session_to_activate)
1123 g_object_unref (seat->priv->session_to_activate);
1124 seat->priv->session_to_activate = g_object_ref (greeter_session);
1126 display_server = create_display_server (seat);
1127 session_set_display_server (SESSION (greeter_session), display_server);
1128 if (!display_server_start (display_server))
1135 seat_switch_to_user (Seat *seat, const gchar *username, const gchar *session_name)
1138 DisplayServer *display_server;
1140 g_return_val_if_fail (seat != NULL, FALSE);
1141 g_return_val_if_fail (username != NULL, FALSE);
1143 if (!seat->priv->can_switch)
1146 g_debug ("Switching to user %s", username);
1148 session = find_user_session (seat, username);
1151 g_debug ("Switching to existing user session %s", username);
1152 seat_set_active_session (seat, session);
1156 session = create_user_session (seat, username);
1159 if (seat->priv->session_to_activate)
1160 g_object_unref (seat->priv->session_to_activate);
1161 seat->priv->session_to_activate = g_object_ref (session);
1162 session_set_pam_service (session, USER_SERVICE);
1164 display_server = create_display_server (seat);
1165 session_set_display_server (session, display_server);
1166 if (!display_server_start (display_server))
1173 find_guest_session (Seat *seat)
1177 for (link = seat->priv->sessions; link; link = link->next)
1179 Session *session = link->data;
1180 if (!session_get_is_stopping (session) && session_get_is_guest (session))
1188 seat_switch_to_guest (Seat *seat, const gchar *session_name)
1191 DisplayServer *display_server;
1193 g_return_val_if_fail (seat != NULL, FALSE);
1195 if (!seat->priv->can_switch || !seat_get_allow_guest (seat))
1198 /* Switch to session if one open */
1199 session = find_guest_session (seat);
1202 g_debug ("Switching to existing guest account %s", session_get_username (session));
1203 seat_set_active_session (seat, session);
1207 session = create_guest_session (seat);
1211 display_server = create_display_server (seat);
1212 if (!display_server_start (display_server))
1215 if (seat->priv->session_to_activate)
1216 g_object_unref (seat->priv->session_to_activate);
1217 seat->priv->session_to_activate = g_object_ref (session);
1218 session_set_pam_service (session, AUTOLOGIN_SERVICE);
1219 session_set_display_server (session, display_server);
1225 seat_lock (Seat *seat, const gchar *username)
1227 Greeter *greeter_session;
1228 DisplayServer *display_server;
1230 g_return_val_if_fail (seat != NULL, FALSE);
1232 if (!seat->priv->can_switch)
1235 g_debug ("Locking seat");
1237 /* Switch to greeter if one open (shouldn't be though) */
1238 greeter_session = find_greeter_session (seat);
1239 if (greeter_session)
1241 g_debug ("Switching to existing greeter");
1242 seat_set_active_session (seat, SESSION (greeter_session));
1246 greeter_session = create_greeter_session (seat);
1247 if (!greeter_session)
1250 display_server = create_display_server (seat);
1251 if (!display_server_start (display_server))
1254 if (seat->priv->session_to_activate)
1255 g_object_unref (seat->priv->session_to_activate);
1256 seat->priv->session_to_activate = g_object_ref (greeter_session);
1257 greeter_set_hint (greeter_session, "lock-screen", "true");
1259 greeter_set_hint (greeter_session, "select-user", username);
1260 session_set_display_server (SESSION (greeter_session), display_server);
1266 seat_stop (Seat *seat)
1268 g_return_if_fail (seat != NULL);
1270 if (seat->priv->stopping)
1273 g_debug ("Stopping seat");
1274 seat->priv->stopping = TRUE;
1275 SEAT_GET_CLASS (seat)->stop (seat);
1279 seat_get_is_stopping (Seat *seat)
1281 g_return_val_if_fail (seat != NULL, FALSE);
1282 return seat->priv->stopping;
1286 seat_real_get_start_local_sessions (Seat *seat)
1292 seat_real_setup (Seat *seat)
1297 seat_real_start (Seat *seat)
1299 const gchar *autologin_username;
1300 int autologin_timeout;
1301 gboolean autologin_guest;
1302 gboolean autologin_in_background;
1303 Session *session = NULL, *background_session = NULL;
1304 DisplayServer *display_server;
1306 g_debug ("Starting seat");
1308 /* If this display server doesn't have a session running on it, just start it */
1309 if (!get_start_local_sessions (seat))
1311 display_server = create_display_server (seat);
1312 return display_server_start (display_server);
1315 /* Get autologin settings */
1316 autologin_username = seat_get_string_property (seat, "autologin-user");
1317 if (g_strcmp0 (autologin_username, "") == 0)
1318 autologin_username = NULL;
1319 autologin_timeout = seat_get_integer_property (seat, "autologin-user-timeout");
1320 autologin_guest = seat_get_boolean_property (seat, "autologin-guest");
1321 autologin_in_background = seat_get_boolean_property (seat, "autologin-in-background");
1323 /* Autologin if configured */
1324 if (autologin_timeout == 0 || autologin_in_background)
1326 if (autologin_guest)
1327 session = create_guest_session (seat);
1328 else if (autologin_username != NULL)
1329 session = create_user_session (seat, autologin_username);
1333 if (seat->priv->session_to_activate)
1334 g_object_unref (seat->priv->session_to_activate);
1335 seat->priv->session_to_activate = g_object_ref (session);
1336 session_set_pam_service (session, AUTOLOGIN_SERVICE);
1339 /* Load in background if required */
1340 if (autologin_in_background && session)
1342 background_session = session;
1347 /* Fallback to a greeter */
1350 Greeter *greeter_session;
1352 greeter_session = create_greeter_session (seat);
1353 if (seat->priv->session_to_activate)
1354 g_object_unref (seat->priv->session_to_activate);
1355 seat->priv->session_to_activate = g_object_ref (greeter_session);
1356 session = SESSION (greeter_session);
1358 if (autologin_timeout)
1362 value = g_strdup_printf ("%d", autologin_timeout);
1363 greeter_set_hint (greeter_session, "autologin-timeout", value);
1365 if (autologin_username)
1366 greeter_set_hint (greeter_session, "autologin-user", autologin_username);
1367 if (autologin_guest)
1368 greeter_set_hint (greeter_session, "autologin-guest", "true");
1372 /* Fail if can't start a session */
1379 display_server = create_display_server (seat);
1380 if (!display_server)
1383 /* Start display server to show session on */
1384 session_set_display_server (session, display_server);
1385 if (!display_server_start (display_server))
1388 /* Start background session */
1389 if (background_session)
1391 DisplayServer *background_display_server;
1393 background_display_server = create_display_server (seat);
1394 session_set_display_server (background_session, background_display_server);
1395 if (!display_server_start (background_display_server))
1396 g_warning ("Failed to start display server for background session");
1403 seat_real_create_greeter_session (Seat *seat)
1405 return greeter_new ();
1409 seat_real_create_session (Seat *seat)
1411 return session_new ();
1415 seat_real_set_active_session (Seat *seat, Session *session)
1420 seat_real_get_active_session (Seat *seat)
1426 seat_real_stop (Seat *seat)
1430 check_stopped (seat);
1431 if (seat->priv->stopped)
1434 /* Stop all the display servers and sessions on the seat. Copy the list as
1435 * it might be modified if a display server / session stops during this loop */
1436 list = g_list_copy (seat->priv->display_servers);
1437 for (link = list; link; link = link->next)
1438 g_object_ref (link->data);
1439 for (link = list; link; link = link->next)
1441 DisplayServer *display_server = link->data;
1442 if (!display_server_get_is_stopping (display_server))
1444 g_debug ("Stopping display server");
1445 display_server_stop (display_server);
1448 g_list_free_full (list, g_object_unref);
1449 list = g_list_copy (seat->priv->sessions);
1450 for (link = list; link; link = link->next)
1451 g_object_ref (link->data);
1452 for (link = list; link; link = link->next)
1454 Session *session = link->data;
1455 if (!session_get_is_stopping (session))
1457 g_debug ("Stopping session");
1458 session_stop (session);
1461 g_list_free_full (list, g_object_unref);
1465 seat_init (Seat *seat)
1467 seat->priv = G_TYPE_INSTANCE_GET_PRIVATE (seat, SEAT_TYPE, SeatPrivate);
1468 seat->priv->properties = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
1469 seat->priv->share_display_server = TRUE;
1473 seat_finalize (GObject *object)
1478 self = SEAT (object);
1480 g_hash_table_unref (self->priv->properties);
1481 for (link = self->priv->display_servers; link; link = link->next)
1483 DisplayServer *display_server = link->data;
1484 g_signal_handlers_disconnect_matched (display_server, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, self);
1486 g_list_free_full (self->priv->display_servers, g_object_unref);
1487 for (link = self->priv->sessions; link; link = link->next)
1489 Session *session = link->data;
1490 g_signal_handlers_disconnect_matched (session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, self);
1492 g_list_free_full (self->priv->sessions, g_object_unref);
1493 if (self->priv->session_to_activate)
1494 g_object_unref (self->priv->session_to_activate);
1496 G_OBJECT_CLASS (seat_parent_class)->finalize (object);
1500 seat_class_init (SeatClass *klass)
1502 GObjectClass *object_class = G_OBJECT_CLASS (klass);
1504 klass->get_start_local_sessions = seat_real_get_start_local_sessions;
1505 klass->setup = seat_real_setup;
1506 klass->start = seat_real_start;
1507 klass->create_greeter_session = seat_real_create_greeter_session;
1508 klass->create_session = seat_real_create_session;
1509 klass->set_active_session = seat_real_set_active_session;
1510 klass->get_active_session = seat_real_get_active_session;
1511 klass->run_script = seat_real_run_script;
1512 klass->stop = seat_real_stop;
1514 object_class->finalize = seat_finalize;
1516 g_type_class_add_private (klass, sizeof (SeatPrivate));
1518 signals[SESSION_ADDED] =
1519 g_signal_new ("session-added",
1520 G_TYPE_FROM_CLASS (klass),
1522 G_STRUCT_OFFSET (SeatClass, session_added),
1525 G_TYPE_NONE, 1, SESSION_TYPE);
1526 signals[RUNNING_USER_SESSION] =
1527 g_signal_new ("running-user-session",
1528 G_TYPE_FROM_CLASS (klass),
1530 G_STRUCT_OFFSET (SeatClass, running_user_session),
1533 G_TYPE_NONE, 1, SESSION_TYPE);
1534 signals[SESSION_REMOVED] =
1535 g_signal_new ("session-removed",
1536 G_TYPE_FROM_CLASS (klass),
1538 G_STRUCT_OFFSET (SeatClass, session_removed),
1541 G_TYPE_NONE, 1, SESSION_TYPE);
1543 g_signal_new ("stopped",
1544 G_TYPE_FROM_CLASS (klass),
1546 G_STRUCT_OFFSET (SeatClass, stopped),