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 belonging to the active greeter user */
52 Session *next_session;
54 /* The session to set active when it starts */
55 Session *session_to_activate;
57 /* TRUE once we have started */
60 /* TRUE if stopping this seat (waiting for displays to stop) */
67 /* PAM services to use */
68 #define GREETER_SERVICE "lightdm-greeter"
69 #define USER_SERVICE "lightdm"
70 #define AUTOLOGIN_SERVICE "lightdm-autologin"
72 G_DEFINE_TYPE (Seat, seat, G_TYPE_OBJECT);
79 static GHashTable *seat_modules = NULL;
81 // FIXME: Make a get_display_server() that re-uses display servers if supported
82 static DisplayServer *create_display_server (Seat *seat, const gchar *session_type);
83 static Greeter *create_greeter_session (Seat *seat);
84 static void start_session (Seat *seat, Session *session);
87 seat_register_module (const gchar *name, GType type)
92 seat_modules = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
94 g_debug ("Registered seat module %s", name);
96 module = g_malloc0 (sizeof (SeatModule));
97 module->name = g_strdup (name);
99 g_hash_table_insert (seat_modules, g_strdup (name), module);
103 seat_new (const gchar *module_name)
106 SeatModule *m = NULL;
108 g_return_val_if_fail (module_name != NULL, NULL);
111 m = g_hash_table_lookup (seat_modules, module_name);
115 seat = g_object_new (m->type, NULL);
121 seat_set_property (Seat *seat, const gchar *name, const gchar *value)
123 g_return_if_fail (seat != NULL);
124 g_hash_table_insert (seat->priv->properties, g_strdup (name), g_strdup (value));
128 seat_get_string_property (Seat *seat, const gchar *name)
130 g_return_val_if_fail (seat != NULL, NULL);
131 return g_hash_table_lookup (seat->priv->properties, name);
135 seat_get_boolean_property (Seat *seat, const gchar *name)
137 return g_strcmp0 (seat_get_string_property (seat, name), "true") == 0;
141 seat_get_integer_property (Seat *seat, const gchar *name)
145 value = seat_get_string_property (seat, name);
146 return value ? atoi (value) : 0;
150 seat_set_can_switch (Seat *seat, gboolean can_switch)
152 g_return_if_fail (seat != NULL);
154 seat->priv->can_switch = can_switch;
158 seat_set_share_display_server (Seat *seat, gboolean share_display_server)
160 g_return_if_fail (seat != NULL);
162 seat->priv->share_display_server = share_display_server;
166 seat_start (Seat *seat)
168 g_return_val_if_fail (seat != NULL, FALSE);
170 SEAT_GET_CLASS (seat)->setup (seat);
171 return SEAT_GET_CLASS (seat)->start (seat);
175 seat_get_sessions (Seat *seat)
177 g_return_val_if_fail (seat != NULL, NULL);
178 return seat->priv->sessions;
182 seat_set_active_session (Seat *seat, Session *session)
186 g_return_if_fail (seat != NULL);
188 /* Unlock this session */
189 if (session != seat->priv->active_session && !IS_GREETER (session))
190 session_unlock (session);
192 SEAT_GET_CLASS (seat)->set_active_session (seat, session);
194 /* Stop any greeters */
195 for (link = seat->priv->sessions; link; link = link->next)
197 Session *s = link->data;
199 if (s == session || session_get_is_stopping (s))
204 g_debug ("Stopping greeter");
209 /* Lock previous sessions */
210 if (seat->priv->active_session)
212 if (session != seat->priv->active_session && !IS_GREETER (seat->priv->active_session))
213 session_lock (seat->priv->active_session);
214 g_object_unref (seat->priv->active_session);
216 seat->priv->active_session = g_object_ref (session);
220 seat_get_active_session (Seat *seat)
222 g_return_val_if_fail (seat != NULL, NULL);
223 return SEAT_GET_CLASS (seat)->get_active_session (seat);
227 seat_get_next_session (Seat *seat)
229 g_return_val_if_fail (seat != NULL, NULL);
230 return seat->priv->next_session;
234 seat_get_can_switch (Seat *seat)
236 g_return_val_if_fail (seat != NULL, FALSE);
237 return seat->priv->can_switch;
241 seat_get_allow_guest (Seat *seat)
243 g_return_val_if_fail (seat != NULL, FALSE);
244 return seat_get_boolean_property (seat, "allow-guest") && guest_account_is_installed ();
248 run_script (Seat *seat, DisplayServer *display_server, const gchar *script_name, User *user)
251 gboolean result = FALSE;
253 script = process_new ();
255 process_set_command (script, script_name);
257 /* Set POSIX variables */
258 process_set_clear_environment (script, TRUE);
259 process_set_env (script, "SHELL", "/bin/sh");
261 /* Variables required for regression tests */
262 if (g_getenv ("LIGHTDM_TEST_ROOT"))
264 process_set_env (script, "LIGHTDM_TEST_ROOT", g_getenv ("LIGHTDM_TEST_ROOT"));
265 process_set_env (script, "LD_PRELOAD", g_getenv ("LD_PRELOAD"));
266 process_set_env (script, "LD_LIBRARY_PATH", g_getenv ("LD_LIBRARY_PATH"));
267 process_set_env (script, "PATH", g_getenv ("PATH"));
270 process_set_env (script, "PATH", "/usr/local/bin:/usr/bin:/bin");
274 process_set_env (script, "USER", user_get_name (user));
275 process_set_env (script, "LOGNAME", user_get_name (user));
276 process_set_env (script, "HOME", user_get_home_directory (user));
279 process_set_env (script, "HOME", "/");
281 SEAT_GET_CLASS (seat)->run_script (seat, display_server, script);
283 if (process_start (script, TRUE))
287 exit_status = process_get_exit_status (script);
288 if (WIFEXITED (exit_status))
290 g_debug ("Exit status of %s: %d", script_name, WEXITSTATUS (exit_status));
291 result = WEXITSTATUS (exit_status) == EXIT_SUCCESS;
295 g_object_unref (script);
301 seat_real_run_script (Seat *seat, DisplayServer *display_server, Process *process)
306 emit_upstart_signal (const gchar *signal)
308 g_return_if_fail (signal != NULL);
309 g_return_if_fail (signal[0] != 0);
314 gchar *cmd = g_strdup_printf ("initctl -q emit %s DISPLAY_MANAGER=lightdm", signal);
315 g_spawn_command_line_async (cmd, NULL); /* OK if it fails, probably not installed */
320 check_stopped (Seat *seat)
322 if (seat->priv->stopping &&
323 !seat->priv->stopped &&
324 g_list_length (seat->priv->display_servers) == 0 &&
325 g_list_length (seat->priv->sessions) == 0)
327 seat->priv->stopped = TRUE;
328 g_debug ("Seat stopped");
329 g_signal_emit (seat, signals[STOPPED], 0);
334 get_start_local_sessions (Seat *seat)
336 return SEAT_GET_CLASS (seat)->get_start_local_sessions (seat);
340 display_server_stopped_cb (DisplayServer *display_server, Seat *seat)
343 Session *active_session;
345 g_debug ("Display server stopped");
347 g_signal_handlers_disconnect_matched (display_server, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, seat);
348 seat->priv->display_servers = g_list_remove (seat->priv->display_servers, display_server);
350 if (seat->priv->stopping || !seat->priv->started)
352 check_stopped (seat);
353 g_object_unref (display_server);
357 /* Stop all sessions on this display server */
358 list = g_list_copy (seat->priv->sessions);
359 for (link = list; link; link = link->next)
360 g_object_ref (link->data);
361 for (link = list; link; link = link->next)
363 Session *session = link->data;
365 if (session_get_display_server (session) != display_server || session_get_is_stopping (session))
368 /* Stop seat if this is the only display server and it failed to start a greeter */
369 if (IS_GREETER (session) &&
370 !session_get_is_started (session) &&
371 g_list_length (seat->priv->display_servers) == 0)
373 g_debug ("Stopping seat, greeter display server failed to start");
377 g_debug ("Stopping session");
378 session_stop (session);
380 g_list_free_full (list, g_object_unref);
382 if (!seat->priv->stopping && get_start_local_sessions (seat))
384 /* If we were the active session, switch to a greeter */
385 active_session = seat_get_active_session (seat);
386 if (!active_session || session_get_display_server (active_session) == display_server)
388 g_debug ("Active display server stopped, starting greeter");
389 seat_switch_to_greeter (seat);
393 g_object_unref (display_server);
397 can_share_display_server (Seat *seat, DisplayServer *display_server)
399 return seat->priv->share_display_server && display_server_get_can_share (display_server);
403 switch_to_greeter_from_failed_session (Seat *seat, Session *session)
405 Greeter *greeter_session;
407 greeter_session = create_greeter_session (seat);
408 if (session_get_is_guest (session))
409 greeter_set_hint (greeter_session, "select-guest", "true");
411 greeter_set_hint (greeter_session, "select-user", session_get_username (session));
412 if (seat->priv->session_to_activate)
413 g_object_unref (seat->priv->session_to_activate);
414 seat->priv->session_to_activate = g_object_ref (greeter_session);
416 if (can_share_display_server (seat, session_get_display_server (session)))
417 session_set_display_server (SESSION (greeter_session), session_get_display_server (session));
420 DisplayServer *display_server;
422 display_server = create_display_server (seat, session_get_session_type (session));
423 if (!display_server_start (display_server))
425 g_debug ("Failed to start display server for greeter");
429 session_set_display_server (session, display_server);
432 start_session (seat, SESSION (greeter_session));
434 /* Stop failed session */
435 session_stop (session);
439 start_session (Seat *seat, Session *session)
441 /* Use system location for greeter log file */
442 if (IS_GREETER (session))
444 gchar *log_dir, *filename, *log_filename;
446 log_dir = config_get_string (config_get_instance (), "LightDM", "log-directory");
447 filename = g_strdup_printf ("%s-greeter.log", display_server_get_name (session_get_display_server (session)));
448 log_filename = g_build_filename (log_dir, filename, NULL);
451 session_set_log_file (session, log_filename);
452 g_free (log_filename);
455 if (session_start (session))
458 if (IS_GREETER (session))
460 g_debug ("Failed to start greeter");
461 display_server_stop (session_get_display_server (session));
465 g_debug ("Failed to start session, starting greeter");
466 switch_to_greeter_from_failed_session (seat, session);
470 run_session (Seat *seat, Session *session)
474 if (IS_GREETER (session))
475 script = seat_get_string_property (seat, "greeter-setup-script");
477 script = seat_get_string_property (seat, "session-setup-script");
478 if (script && !run_script (seat, session_get_display_server (session), script, NULL))
480 g_debug ("Switching to greeter due to failed setup script");
481 switch_to_greeter_from_failed_session (seat, session);
485 if (!IS_GREETER (session))
487 g_signal_emit (seat, signals[RUNNING_USER_SESSION], 0, session);
488 emit_upstart_signal ("desktop-session-start");
491 session_run (session);
493 // FIXME: Wait until the session is ready
495 if (session == seat->priv->session_to_activate)
497 seat_set_active_session (seat, session);
498 g_object_unref (seat->priv->session_to_activate);
499 seat->priv->session_to_activate = NULL;
504 find_user_session (Seat *seat, const gchar *username)
511 for (link = seat->priv->sessions; link; link = link->next)
513 Session *session = link->data;
515 if (!session_get_is_stopping (session) && strcmp (session_get_username (session), username) == 0)
523 greeter_active_username_changed_cb (Greeter *greeter, GParamSpec *pspec, Seat *seat)
527 session = find_user_session (seat, greeter_get_active_username (greeter));
530 if (seat->priv->next_session)
531 g_object_unref (seat->priv->next_session);
532 seat->priv->next_session = g_object_ref (session);
534 SEAT_GET_CLASS (seat)->set_next_session (seat, session);
539 session_authentication_complete_cb (Session *session, Seat *seat)
541 if (session_get_is_authenticated (session))
543 g_debug ("Session authenticated, running command");
544 run_session (seat, session);
546 else if (!IS_GREETER (session))
548 g_debug ("Switching to greeter due to failed authentication");
549 switch_to_greeter_from_failed_session (seat, session);
553 g_debug ("Stopping session that failed authentication");
554 session_stop (session);
559 session_stopped_cb (Session *session, Seat *seat)
561 DisplayServer *display_server;
563 g_debug ("Session stopped");
565 g_signal_handlers_disconnect_matched (session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, seat);
566 seat->priv->sessions = g_list_remove (seat->priv->sessions, session);
567 if (session == seat->priv->active_session)
569 g_object_unref (seat->priv->active_session);
570 seat->priv->active_session = NULL;
572 if (session == seat->priv->next_session)
574 g_object_unref (seat->priv->next_session);
575 seat->priv->next_session = NULL;
577 if (session == seat->priv->session_to_activate)
579 g_object_unref (seat->priv->session_to_activate);
580 seat->priv->session_to_activate = NULL;
583 display_server = session_get_display_server (session);
586 g_object_unref (session);
591 if (!IS_GREETER (session))
594 script = seat_get_string_property (seat, "session-cleanup-script");
596 run_script (seat, display_server, script, session_get_user (session));
599 /* We were waiting for this session, but it didn't start :( */
600 // FIXME: Start a greeter on this?
601 if (session == seat->priv->session_to_activate)
603 g_object_unref (seat->priv->session_to_activate);
604 seat->priv->session_to_activate = NULL;
607 if (seat->priv->stopping)
609 check_stopped (seat);
610 g_object_unref (session);
614 /* If this is the greeter session then re-use this display server */
615 if (IS_GREETER (session) &&
616 can_share_display_server (seat, display_server) &&
617 greeter_get_start_session (GREETER (session)))
621 for (link = seat->priv->sessions; link; link = link->next)
623 Session *s = link->data;
625 /* Skip this session and sessions on other display servers */
626 if (s == session || session_get_display_server (s) != display_server || session_get_is_stopping (s))
629 if (session_get_is_authenticated (s))
631 g_debug ("Greeter stopped, running session");
632 run_session (seat, s);
636 g_debug ("Greeter stopped, starting session authentication");
637 start_session (seat, s);
642 /* If this is the greeter and nothing else is running then stop the seat */
643 else if (IS_GREETER (session) &&
644 !greeter_get_start_session (GREETER (session)) &&
645 g_list_length (seat->priv->display_servers) == 1 &&
646 g_list_nth_data (seat->priv->display_servers, 0) == display_server)
648 g_debug ("Stopping seat, failed to start a greeter");
651 /* If we were the active session, switch to a greeter */
652 else if (!IS_GREETER (session) && session == seat_get_active_session (seat))
654 g_debug ("Active session stopped, starting greeter");
655 seat_switch_to_greeter (seat);
658 /* Stop the display server if no-longer required */
659 if (display_server && !display_server_get_is_stopping (display_server))
664 for (link = seat->priv->sessions; link; link = link->next)
666 Session *s = link->data;
669 if (session_get_display_server (s) == display_server)
674 g_debug ("Stopping display server, no sessions require it");
675 display_server_stop (display_server);
679 g_signal_emit (seat, signals[SESSION_REMOVED], 0, session);
680 g_object_unref (session);
684 set_session_env (Session *session)
686 /* Connect using the session bus */
689 if (g_getenv ("DBUS_SESSION_BUS_ADDRESS"))
690 session_set_env (session, "DBUS_SESSION_BUS_ADDRESS", g_getenv ("DBUS_SESSION_BUS_ADDRESS"));
691 session_set_env (session, "LDM_BUS", "SESSION");
692 if (g_getenv ("LD_PRELOAD"))
693 session_set_env (session, "LD_PRELOAD", g_getenv ("LD_PRELOAD"));
694 if (g_getenv ("LD_LIBRARY_PATH"))
695 session_set_env (session, "LD_LIBRARY_PATH", g_getenv ("LD_LIBRARY_PATH"));
696 if (g_getenv ("PATH"))
697 session_set_env (session, "PATH", g_getenv ("PATH"));
700 /* Variables required for regression tests */
701 if (g_getenv ("LIGHTDM_TEST_ROOT"))
703 session_set_env (session, "LIGHTDM_TEST_ROOT", g_getenv ("LIGHTDM_TEST_ROOT"));
704 session_set_env (session, "DBUS_SYSTEM_BUS_ADDRESS", g_getenv ("DBUS_SYSTEM_BUS_ADDRESS"));
705 session_set_env (session, "DBUS_SESSION_BUS_ADDRESS", g_getenv ("DBUS_SESSION_BUS_ADDRESS"));
706 session_set_env (session, "LD_PRELOAD", g_getenv ("LD_PRELOAD"));
707 session_set_env (session, "LD_LIBRARY_PATH", g_getenv ("LD_LIBRARY_PATH"));
708 session_set_env (session, "GI_TYPELIB_PATH", g_getenv ("GI_TYPELIB_PATH"));
713 create_session (Seat *seat, gboolean autostart, const gchar *username)
716 Session *user_session;
718 user_session = find_user_session (seat, username);
719 session = SEAT_GET_CLASS (seat)->create_session (seat, user_session);
720 seat->priv->sessions = g_list_append (seat->priv->sessions, session);
722 g_signal_connect (session, "authentication-complete", G_CALLBACK (session_authentication_complete_cb), seat);
723 g_signal_connect (session, "stopped", G_CALLBACK (session_stopped_cb), seat);
725 set_session_env (session);
727 g_signal_emit (seat, signals[SESSION_ADDED], 0, session);
733 get_session_argv (SessionConfig *session_config, const gchar *session_wrapper)
738 GError *error = NULL;
740 /* If configured, run sessions through a wrapper */
743 argv = g_malloc (sizeof (gchar *) * 3);
744 path = g_find_program_in_path (session_wrapper);
745 argv[0] = path ? path : g_strdup (session_wrapper);
746 argv[1] = g_strdup (session_config_get_command (session_config));
751 /* Split command into an array listing and make command absolute */
752 result = g_shell_parse_argv (session_config_get_command (session_config), &argc, &argv, &error);
754 g_debug ("Invalid session command '%s': %s", session_config_get_command (session_config), error->message);
755 g_clear_error (&error);
758 path = g_find_program_in_path (argv[0]);
768 static SessionConfig *
769 find_session_config (const gchar *sessions_dir, const gchar *session_name)
772 SessionConfig *session_config = NULL;
774 GError *error = NULL;
776 g_return_val_if_fail (sessions_dir != NULL, NULL);
777 g_return_val_if_fail (session_name != NULL, NULL);
779 dirs = g_strsplit (sessions_dir, ":", -1);
780 for (i = 0; dirs[i]; i++)
782 gchar *filename, *path;
784 filename = g_strdup_printf ("%s.desktop", session_name);
785 path = g_build_filename (dirs[i], filename, NULL);
787 session_config = session_config_new_from_file (path, &error);
792 if (dirs[i+1] == NULL)
793 g_debug ("Failed to find session configuration %s", session_name);
794 g_clear_error (&error);
798 return session_config;
802 create_user_session (Seat *seat, const gchar *username)
806 const gchar *session_name, *language;
807 SessionConfig *session_config;
808 Session *session = NULL;
810 g_debug ("Creating user session");
812 /* Load user preferences */
813 user = accounts_get_user_by_name (username);
816 g_debug ("Can't login unknown user '%s'", username);
819 session_name = user_get_xsession (user);
820 language = user_get_language (user);
823 session_name = seat_get_string_property (seat, "user-session");
824 sessions_dir = config_get_string (config_get_instance (), "LightDM", "sessions-directory");
825 session_config = find_session_config (sessions_dir, session_name);
826 g_free (sessions_dir);
829 const gchar *desktop_name;
832 session = create_session (seat, TRUE, username);
833 session_set_session_type (session, session_config_get_session_type (session_config));
834 session_set_env (session, "DESKTOP_SESSION", session_name);
835 session_set_env (session, "GDMSESSION", session_name);
836 desktop_name = session_config_get_desktop_name (session_config);
838 session_set_env (session, "XDG_CURRENT_DESKTOP", desktop_name);
839 if (language && language[0] != '\0')
841 session_set_env (session, "LANG", language);
842 session_set_env (session, "GDM_LANG", language);
844 session_set_pam_service (session, AUTOLOGIN_SERVICE);
845 session_set_username (session, username);
846 session_set_do_authenticate (session, TRUE);
847 argv = get_session_argv (session_config, seat_get_string_property (seat, "session-wrapper"));
848 session_set_argv (session, argv);
851 g_object_unref (session_config);
854 g_debug ("Can't find session '%s'", seat_get_string_property (seat, "user-session"));
857 g_object_unref (user);
863 create_guest_session (Seat *seat)
865 gchar *sessions_dir, **argv;
866 SessionConfig *session_config;
869 sessions_dir = config_get_string (config_get_instance (), "LightDM", "sessions-directory");
870 session_config = find_session_config (sessions_dir, seat_get_string_property (seat, "user-session"));
871 g_free (sessions_dir);
874 g_debug ("Can't find session '%s'", seat_get_string_property (seat, "user-session"));
878 session = create_session (seat, TRUE, NULL);
879 session_set_session_type (session, session_config_get_session_type (session_config));
880 session_set_do_authenticate (session, TRUE);
881 session_set_is_guest (session, TRUE);
882 argv = get_session_argv (session_config, seat_get_string_property (seat, "session-wrapper"));
883 g_object_unref (session_config);
884 session_set_argv (session, argv);
891 greeter_create_session_cb (Greeter *greeter, Seat *seat, const gchar *username)
895 session = create_session (seat, FALSE, username);
896 session_set_session_type (session, session_get_session_type (SESSION (greeter)));
897 session_set_display_server (session, session_get_display_server (SESSION (greeter)));
899 return g_object_ref (session);
903 prepend_argv (gchar ***argv, const gchar *value)
905 gchar **old_argv, **new_argv;
909 new_argv = g_malloc (sizeof (gchar *) * (g_strv_length (*argv) + 2));
910 new_argv[0] = g_strdup (value);
911 for (i = 0; old_argv[i]; i++)
912 new_argv[i + 1] = old_argv[i];
913 new_argv[i + 1] = NULL;
920 greeter_start_session_cb (Greeter *greeter, SessionType type, const gchar *session_name, Seat *seat)
922 Session *session, *existing_session;
923 const gchar *username, *language = NULL;
924 SessionConfig *session_config;
926 gchar *sessions_dir = NULL;
928 DisplayServer *display_server;
930 /* Get the session to use */
931 if (greeter_get_guest_authenticated (greeter))
933 session = create_guest_session (seat);
936 session_set_pam_service (session, AUTOLOGIN_SERVICE);
939 session = greeter_get_authentication_session (greeter);
941 /* Switch to this session when it is ready */
942 if (seat->priv->session_to_activate)
943 g_object_unref (seat->priv->session_to_activate);
944 seat->priv->session_to_activate = g_object_ref (session);
946 /* Return to existing session if it is open */
947 username = session_get_username (session);
948 existing_session = find_user_session (seat, username);
949 if (existing_session && session != existing_session)
951 g_debug ("Returning to existing user session %s", username);
952 session_stop (session);
953 seat_set_active_session (seat, existing_session);
957 /* Get session command to run */
960 case SESSION_TYPE_LOCAL:
961 sessions_dir = config_get_string (config_get_instance (), "LightDM", "sessions-directory");
963 case SESSION_TYPE_REMOTE:
964 sessions_dir = config_get_string (config_get_instance (), "LightDM", "remote-sessions-directory");
968 /* Load user preferences */
969 user = session_get_user (session);
973 session_name = user_get_xsession (user);
974 language = user_get_language (user);
978 session_name = seat_get_string_property (seat, "user-session");
980 user_set_xsession (session_get_user (session), session_name);
982 session_config = find_session_config (sessions_dir, session_name);
983 g_free (sessions_dir);
986 g_debug ("Can't find session '%s'", seat_get_string_property (seat, "user-session"));
990 session_set_session_type (session, session_config_get_session_type (session_config));
991 argv = get_session_argv (session_config, seat_get_string_property (seat, "session-wrapper"));
992 session_set_argv (session, argv);
994 session_set_env (session, "DESKTOP_SESSION", session_name);
995 session_set_env (session, "GDMSESSION", session_name);
996 if (language && language[0] != '\0')
998 session_set_env (session, "LANG", language);
999 session_set_env (session, "GDM_LANG", language);
1002 g_object_unref (session_config);
1004 /* If can re-use the display server, stop the greeter first */
1005 display_server = session_get_display_server (SESSION (greeter));
1006 if (can_share_display_server (seat, display_server) &&
1007 strcmp (display_server_get_session_type (display_server), session_get_session_type (session)) == 0)
1009 g_debug ("Stopping greeter; display server will be re-used for user session");
1011 /* Run on the same display server after the greeter has stopped */
1012 session_set_display_server (session, display_server);
1014 /* Stop the greeter */
1015 session_stop (SESSION (greeter));
1019 /* Otherwise start a new display server for this session */
1022 display_server = create_display_server (seat, session_get_session_type (session));
1023 session_set_display_server (session, display_server);
1024 if (!display_server_start (display_server))
1026 g_debug ("Failed to start display server for new session");
1035 create_greeter_session (Seat *seat)
1037 gchar *sessions_dir, **argv;
1038 SessionConfig *session_config;
1039 Greeter *greeter_session;
1040 gchar *greeter_user;
1041 const gchar *greeter_wrapper;
1043 g_debug ("Creating greeter session");
1045 sessions_dir = config_get_string (config_get_instance (), "LightDM", "greeters-directory");
1046 session_config = find_session_config (sessions_dir, seat_get_string_property (seat, "greeter-session"));
1047 g_free (sessions_dir);
1048 if (!session_config)
1051 argv = get_session_argv (session_config, NULL);
1052 greeter_wrapper = seat_get_string_property (seat, "greeter-wrapper");
1053 if (greeter_wrapper)
1056 path = g_find_program_in_path (greeter_wrapper);
1057 prepend_argv (&argv, path ? path : greeter_wrapper);
1061 greeter_session = SEAT_GET_CLASS (seat)->create_greeter_session (seat);
1062 session_set_session_type (SESSION (greeter_session), session_config_get_session_type (session_config));
1063 seat->priv->sessions = g_list_append (seat->priv->sessions, SESSION (greeter_session));
1064 g_signal_connect (greeter_session, "notify::active-username", G_CALLBACK (greeter_active_username_changed_cb), seat);
1065 g_signal_connect (greeter_session, "authentication-complete", G_CALLBACK (session_authentication_complete_cb), seat);
1066 g_signal_connect (greeter_session, "stopped", G_CALLBACK (session_stopped_cb), seat);
1068 set_session_env (SESSION (greeter_session));
1070 session_set_pam_service (SESSION (greeter_session), GREETER_SERVICE);
1071 greeter_user = config_get_string (config_get_instance (), "LightDM", "greeter-user");
1072 session_set_username (SESSION (greeter_session), greeter_user);
1073 g_free (greeter_user);
1074 session_set_argv (SESSION (greeter_session), argv);
1077 greeter_set_pam_services (greeter_session, USER_SERVICE, AUTOLOGIN_SERVICE);
1078 g_signal_connect (greeter_session, "create-session", G_CALLBACK (greeter_create_session_cb), seat);
1079 g_signal_connect (greeter_session, "start-session", G_CALLBACK (greeter_start_session_cb), seat);
1081 /* Set hints to greeter */
1082 greeter_set_hint (greeter_session, "default-session", seat_get_string_property (seat, "user-session"));
1083 greeter_set_allow_guest (greeter_session, seat_get_allow_guest (seat));
1084 greeter_set_hint (greeter_session, "hide-users", seat_get_boolean_property (seat, "greeter-hide-users") ? "true" : "false");
1085 greeter_set_hint (greeter_session, "show-manual-login", seat_get_boolean_property (seat, "greeter-show-manual-login") ? "true" : "false");
1086 greeter_set_hint (greeter_session, "show-remote-login", seat_get_boolean_property (seat, "greeter-show-remote-login") ? "true" : "false");
1087 greeter_set_hint (greeter_session, "has-guest-account", seat_get_allow_guest (seat) && seat_get_boolean_property (seat, "greeter-allow-guest") ? "true" : "false");
1089 g_object_unref (session_config);
1091 return greeter_session;
1095 find_session_for_display_server (Seat *seat, DisplayServer *display_server)
1099 for (link = seat->priv->sessions; link; link = link->next)
1101 Session *session = link->data;
1102 if (session_get_display_server (session) == display_server && !session_get_is_stopping (session))
1110 display_server_ready_cb (DisplayServer *display_server, Seat *seat)
1112 const gchar *script;
1115 /* Run setup script */
1116 script = seat_get_string_property (seat, "display-setup-script");
1117 if (script && !run_script (seat, display_server, script, NULL))
1119 g_debug ("Stopping display server due to failed setup script");
1120 display_server_stop (display_server);
1124 /* Stop if don't need to run a session */
1125 if (!get_start_local_sessions (seat))
1128 emit_upstart_signal ("login-session-start");
1130 /* Start the session waiting for this display server */
1131 session = find_session_for_display_server (seat, display_server);
1134 if (session_get_is_authenticated (session))
1136 g_debug ("Display server ready, running session");
1137 run_session (seat, session);
1141 g_debug ("Display server ready, starting session authentication");
1142 start_session (seat, session);
1147 g_debug ("Stopping not required display server");
1148 display_server_stop (display_server);
1152 static DisplayServer *
1153 create_display_server (Seat *seat, const gchar *session_type)
1155 DisplayServer *display_server;
1157 g_debug ("Creating display server of type %s", session_type);
1159 display_server = SEAT_GET_CLASS (seat)->create_display_server (seat, session_type);
1160 if (!display_server)
1163 seat->priv->display_servers = g_list_append (seat->priv->display_servers, display_server);
1164 g_signal_connect (display_server, "ready", G_CALLBACK (display_server_ready_cb), seat);
1165 g_signal_connect (display_server, "stopped", G_CALLBACK (display_server_stopped_cb), seat);
1167 return display_server;
1171 find_greeter_session (Seat *seat)
1175 for (link = seat->priv->sessions; link; link = link->next)
1177 Session *session = link->data;
1178 if (!session_get_is_stopping (session) && IS_GREETER (session))
1179 return GREETER (session);
1186 seat_switch_to_greeter (Seat *seat)
1188 Greeter *greeter_session;
1189 DisplayServer *display_server;
1191 g_return_val_if_fail (seat != NULL, FALSE);
1193 if (!seat->priv->can_switch)
1196 /* Switch to greeter if one open (shouldn't be though) */
1197 greeter_session = find_greeter_session (seat);
1198 if (greeter_session)
1200 g_debug ("Switching to existing greeter");
1201 seat_set_active_session (seat, SESSION (greeter_session));
1205 greeter_session = create_greeter_session (seat);
1206 if (seat->priv->session_to_activate)
1207 g_object_unref (seat->priv->session_to_activate);
1208 seat->priv->session_to_activate = g_object_ref (greeter_session);
1210 display_server = create_display_server (seat, session_get_session_type (SESSION (greeter_session)));
1211 session_set_display_server (SESSION (greeter_session), display_server);
1212 if (!display_server_start (display_server))
1219 seat_switch_to_user (Seat *seat, const gchar *username, const gchar *session_name)
1222 DisplayServer *display_server;
1224 g_return_val_if_fail (seat != NULL, FALSE);
1225 g_return_val_if_fail (username != NULL, FALSE);
1227 if (!seat->priv->can_switch)
1230 g_debug ("Switching to user %s", username);
1232 session = find_user_session (seat, username);
1235 g_debug ("Switching to existing user session %s", username);
1236 seat_set_active_session (seat, session);
1240 session = create_user_session (seat, username);
1243 if (seat->priv->session_to_activate)
1244 g_object_unref (seat->priv->session_to_activate);
1245 seat->priv->session_to_activate = g_object_ref (session);
1246 session_set_pam_service (session, USER_SERVICE);
1248 display_server = create_display_server (seat, session_get_session_type (session));
1249 session_set_display_server (session, display_server);
1250 if (!display_server_start (display_server))
1257 find_guest_session (Seat *seat)
1261 for (link = seat->priv->sessions; link; link = link->next)
1263 Session *session = link->data;
1264 if (!session_get_is_stopping (session) && session_get_is_guest (session))
1272 seat_switch_to_guest (Seat *seat, const gchar *session_name)
1275 DisplayServer *display_server;
1277 g_return_val_if_fail (seat != NULL, FALSE);
1279 if (!seat->priv->can_switch || !seat_get_allow_guest (seat))
1282 /* Switch to session if one open */
1283 session = find_guest_session (seat);
1286 g_debug ("Switching to existing guest account %s", session_get_username (session));
1287 seat_set_active_session (seat, session);
1291 session = create_guest_session (seat);
1295 display_server = create_display_server (seat, session_get_session_type (session));
1296 if (!display_server_start (display_server))
1299 if (seat->priv->session_to_activate)
1300 g_object_unref (seat->priv->session_to_activate);
1301 seat->priv->session_to_activate = g_object_ref (session);
1302 session_set_pam_service (session, AUTOLOGIN_SERVICE);
1303 session_set_display_server (session, display_server);
1309 seat_lock (Seat *seat, const gchar *username)
1311 Greeter *greeter_session;
1312 DisplayServer *display_server;
1314 g_return_val_if_fail (seat != NULL, FALSE);
1316 if (!seat->priv->can_switch)
1319 g_debug ("Locking seat");
1321 /* Switch to greeter if one open (shouldn't be though) */
1322 greeter_session = find_greeter_session (seat);
1323 if (greeter_session)
1325 g_debug ("Switching to existing greeter");
1326 seat_set_active_session (seat, SESSION (greeter_session));
1330 greeter_session = create_greeter_session (seat);
1331 if (!greeter_session)
1334 display_server = create_display_server (seat, session_get_session_type (SESSION (greeter_session)));
1335 if (!display_server_start (display_server))
1338 if (seat->priv->session_to_activate)
1339 g_object_unref (seat->priv->session_to_activate);
1340 seat->priv->session_to_activate = g_object_ref (greeter_session);
1341 greeter_set_hint (greeter_session, "lock-screen", "true");
1343 greeter_set_hint (greeter_session, "select-user", username);
1344 session_set_display_server (SESSION (greeter_session), display_server);
1350 seat_stop (Seat *seat)
1352 g_return_if_fail (seat != NULL);
1354 if (seat->priv->stopping)
1357 g_debug ("Stopping seat");
1358 seat->priv->stopping = TRUE;
1359 SEAT_GET_CLASS (seat)->stop (seat);
1363 seat_get_is_stopping (Seat *seat)
1365 g_return_val_if_fail (seat != NULL, FALSE);
1366 return seat->priv->stopping;
1370 seat_real_get_start_local_sessions (Seat *seat)
1376 seat_real_setup (Seat *seat)
1381 seat_real_start (Seat *seat)
1383 const gchar *autologin_username;
1384 int autologin_timeout;
1385 gboolean autologin_guest;
1386 gboolean autologin_in_background;
1387 Session *session = NULL, *background_session = NULL;
1389 g_debug ("Starting seat");
1391 /* If this display server doesn't have a session running on it, just start it */
1392 if (!get_start_local_sessions (seat))
1394 DisplayServer *display_server;
1395 display_server = create_display_server (seat, "x"); // FIXME: Not necessarily an X seat, but not sure what to put here
1396 return display_server_start (display_server);
1399 /* Get autologin settings */
1400 autologin_username = seat_get_string_property (seat, "autologin-user");
1401 if (g_strcmp0 (autologin_username, "") == 0)
1402 autologin_username = NULL;
1403 autologin_timeout = seat_get_integer_property (seat, "autologin-user-timeout");
1404 autologin_guest = seat_get_boolean_property (seat, "autologin-guest");
1405 autologin_in_background = seat_get_boolean_property (seat, "autologin-in-background");
1407 /* Autologin if configured */
1408 if (autologin_timeout == 0 || autologin_in_background)
1410 if (autologin_guest)
1411 session = create_guest_session (seat);
1412 else if (autologin_username != NULL)
1413 session = create_user_session (seat, autologin_username);
1416 session_set_pam_service (session, AUTOLOGIN_SERVICE);
1418 /* Load in background if required */
1419 if (autologin_in_background && session)
1421 background_session = session;
1427 DisplayServer *display_server;
1429 if (seat->priv->session_to_activate)
1430 g_object_unref (seat->priv->session_to_activate);
1431 seat->priv->session_to_activate = g_object_ref (session);
1433 display_server = create_display_server (seat, session_get_session_type (session));
1434 session_set_display_server (session, display_server);
1435 if (!display_server || !display_server_start (display_server))
1437 g_debug ("Can't create display server for automatic login");
1438 session_stop (session);
1440 display_server_stop (display_server);
1446 /* Fallback to a greeter */
1449 Greeter *greeter_session;
1450 DisplayServer *display_server;
1452 greeter_session = create_greeter_session (seat);
1453 if (!greeter_session)
1455 g_debug ("Failed to create greeter session");
1459 if (seat->priv->session_to_activate)
1460 g_object_unref (seat->priv->session_to_activate);
1461 seat->priv->session_to_activate = g_object_ref (greeter_session);
1462 session = SESSION (greeter_session);
1464 if (autologin_timeout)
1468 value = g_strdup_printf ("%d", autologin_timeout);
1469 greeter_set_hint (greeter_session, "autologin-timeout", value);
1471 if (autologin_username)
1472 greeter_set_hint (greeter_session, "autologin-user", autologin_username);
1473 if (autologin_guest)
1474 greeter_set_hint (greeter_session, "autologin-guest", "true");
1477 display_server = create_display_server (seat, session_get_session_type (session));
1478 session_set_display_server (session, display_server);
1479 if (!display_server || !display_server_start (display_server))
1481 g_debug ("Can't create display server for greeter");
1482 session_stop (session);
1484 display_server_stop (display_server);
1489 /* Fail if can't start a session */
1496 /* Start background session */
1497 if (background_session)
1499 DisplayServer *background_display_server;
1501 background_display_server = create_display_server (seat, session_get_session_type (background_session));
1502 session_set_display_server (background_session, background_display_server);
1503 if (!display_server_start (background_display_server))
1504 g_warning ("Failed to start display server for background session");
1507 seat->priv->started = TRUE;
1512 seat_real_create_greeter_session (Seat *seat)
1514 return greeter_new ();
1518 seat_real_create_session (Seat *seat, Session *user_session)
1520 return session_new ();
1524 seat_real_set_active_session (Seat *seat, Session *session)
1529 seat_real_set_next_session (Seat *seat, Session *session)
1534 seat_real_get_active_session (Seat *seat)
1540 seat_real_stop (Seat *seat)
1544 check_stopped (seat);
1545 if (seat->priv->stopped)
1548 /* Stop all the display servers and sessions on the seat. Copy the list as
1549 * it might be modified if a display server / session stops during this loop */
1550 list = g_list_copy (seat->priv->display_servers);
1551 for (link = list; link; link = link->next)
1552 g_object_ref (link->data);
1553 for (link = list; link; link = link->next)
1555 DisplayServer *display_server = link->data;
1556 if (!display_server_get_is_stopping (display_server))
1558 g_debug ("Stopping display server");
1559 display_server_stop (display_server);
1562 g_list_free_full (list, g_object_unref);
1563 list = g_list_copy (seat->priv->sessions);
1564 for (link = list; link; link = link->next)
1565 g_object_ref (link->data);
1566 for (link = list; link; link = link->next)
1568 Session *session = link->data;
1569 if (!session_get_is_stopping (session))
1571 g_debug ("Stopping session");
1572 session_stop (session);
1575 g_list_free_full (list, g_object_unref);
1579 seat_init (Seat *seat)
1581 seat->priv = G_TYPE_INSTANCE_GET_PRIVATE (seat, SEAT_TYPE, SeatPrivate);
1582 seat->priv->properties = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
1583 seat->priv->share_display_server = TRUE;
1587 seat_finalize (GObject *object)
1592 self = SEAT (object);
1594 g_hash_table_unref (self->priv->properties);
1595 for (link = self->priv->display_servers; link; link = link->next)
1597 DisplayServer *display_server = link->data;
1598 g_signal_handlers_disconnect_matched (display_server, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, self);
1600 g_list_free_full (self->priv->display_servers, g_object_unref);
1601 for (link = self->priv->sessions; link; link = link->next)
1603 Session *session = link->data;
1604 g_signal_handlers_disconnect_matched (session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, self);
1606 g_list_free_full (self->priv->sessions, g_object_unref);
1607 if (self->priv->active_session)
1608 g_object_unref (self->priv->active_session);
1609 if (self->priv->next_session)
1610 g_object_unref (self->priv->next_session);
1611 if (self->priv->session_to_activate)
1612 g_object_unref (self->priv->session_to_activate);
1614 G_OBJECT_CLASS (seat_parent_class)->finalize (object);
1618 seat_class_init (SeatClass *klass)
1620 GObjectClass *object_class = G_OBJECT_CLASS (klass);
1622 klass->get_start_local_sessions = seat_real_get_start_local_sessions;
1623 klass->setup = seat_real_setup;
1624 klass->start = seat_real_start;
1625 klass->create_greeter_session = seat_real_create_greeter_session;
1626 klass->create_session = seat_real_create_session;
1627 klass->set_active_session = seat_real_set_active_session;
1628 klass->get_active_session = seat_real_get_active_session;
1629 klass->set_next_session = seat_real_set_next_session;
1630 klass->run_script = seat_real_run_script;
1631 klass->stop = seat_real_stop;
1633 object_class->finalize = seat_finalize;
1635 g_type_class_add_private (klass, sizeof (SeatPrivate));
1637 signals[SESSION_ADDED] =
1638 g_signal_new ("session-added",
1639 G_TYPE_FROM_CLASS (klass),
1641 G_STRUCT_OFFSET (SeatClass, session_added),
1644 G_TYPE_NONE, 1, SESSION_TYPE);
1645 signals[RUNNING_USER_SESSION] =
1646 g_signal_new ("running-user-session",
1647 G_TYPE_FROM_CLASS (klass),
1649 G_STRUCT_OFFSET (SeatClass, running_user_session),
1652 G_TYPE_NONE, 1, SESSION_TYPE);
1653 signals[SESSION_REMOVED] =
1654 g_signal_new ("session-removed",
1655 G_TYPE_FROM_CLASS (klass),
1657 G_STRUCT_OFFSET (SeatClass, session_removed),
1660 G_TYPE_NONE, 1, SESSION_TYPE);
1662 g_signal_new ("stopped",
1663 G_TYPE_FROM_CLASS (klass),
1665 G_STRUCT_OFFSET (SeatClass, stopped),