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"
28 static guint signals[LAST_SIGNAL] = { 0 };
32 /* Configuration for this seat */
33 GHashTable *properties;
35 /* TRUE if able to switch users */
38 /* TRUE if display server can be shared for sessions */
39 gboolean share_display_server;
41 /* The display servers on this seat */
42 GList *display_servers;
44 /* The sessions on this seat */
47 /* The session to set active when it starts */
48 Session *session_to_activate;
50 /* TRUE if stopping this seat (waiting for displays to stop) */
57 /* PAM services to use */
58 #define GREETER_SERVICE "lightdm-greeter"
59 #define USER_SERVICE "lightdm"
60 #define AUTOLOGIN_SERVICE "lightdm-autologin"
62 G_DEFINE_TYPE (Seat, seat, G_TYPE_OBJECT);
69 static GHashTable *seat_modules = NULL;
71 // FIXME: Make a get_display_server() that re-uses display servers if supported
72 static DisplayServer *create_display_server (Seat *seat);
73 static Greeter *create_greeter_session (Seat *seat);
74 static void start_session (Seat *seat, Session *session);
77 seat_register_module (const gchar *name, GType type)
82 seat_modules = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
84 g_debug ("Registered seat module %s", name);
86 module = g_malloc0 (sizeof (SeatModule));
87 module->name = g_strdup (name);
89 g_hash_table_insert (seat_modules, g_strdup (name), module);
93 seat_new (const gchar *module_name)
98 g_return_val_if_fail (module_name != NULL, NULL);
101 m = g_hash_table_lookup (seat_modules, module_name);
105 seat = g_object_new (m->type, NULL);
111 seat_set_property (Seat *seat, const gchar *name, const gchar *value)
113 g_return_if_fail (seat != NULL);
114 g_hash_table_insert (seat->priv->properties, g_strdup (name), g_strdup (value));
118 seat_get_string_property (Seat *seat, const gchar *name)
120 g_return_val_if_fail (seat != NULL, NULL);
121 return g_hash_table_lookup (seat->priv->properties, name);
125 seat_get_boolean_property (Seat *seat, const gchar *name)
127 return g_strcmp0 (seat_get_string_property (seat, name), "true") == 0;
131 seat_get_integer_property (Seat *seat, const gchar *name)
135 value = seat_get_string_property (seat, name);
136 return value ? atoi (value) : 0;
140 seat_set_can_switch (Seat *seat, gboolean can_switch)
142 g_return_if_fail (seat != NULL);
144 seat->priv->can_switch = can_switch;
148 seat_set_share_display_server (Seat *seat, gboolean share_display_server)
150 g_return_if_fail (seat != NULL);
152 seat->priv->share_display_server = share_display_server;
156 seat_start (Seat *seat)
158 g_return_val_if_fail (seat != NULL, FALSE);
160 SEAT_GET_CLASS (seat)->setup (seat);
161 return SEAT_GET_CLASS (seat)->start (seat);
165 seat_get_sessions (Seat *seat)
167 g_return_val_if_fail (seat != NULL, NULL);
168 return seat->priv->sessions;
172 seat_set_active_session (Seat *seat, Session *session)
176 g_return_if_fail (seat != NULL);
178 SEAT_GET_CLASS (seat)->set_active_session (seat, session);
180 /* Stop any greeters */
181 for (link = seat->priv->sessions; link; link = link->next)
183 Session *s = link->data;
185 if (s == session || session_get_is_stopping (s))
190 g_debug ("Stopping greeter");
197 seat_get_active_session (Seat *seat)
199 g_return_val_if_fail (seat != NULL, NULL);
200 return SEAT_GET_CLASS (seat)->get_active_session (seat);
204 seat_get_can_switch (Seat *seat)
206 g_return_val_if_fail (seat != NULL, FALSE);
207 return seat->priv->can_switch;
211 seat_get_allow_guest (Seat *seat)
213 g_return_val_if_fail (seat != NULL, FALSE);
214 return seat_get_boolean_property (seat, "allow-guest") && guest_account_is_installed ();
218 seat_get_greeter_allow_guest (Seat *seat)
220 g_return_val_if_fail (seat != NULL, FALSE);
221 return seat_get_allow_guest (seat) && seat_get_boolean_property (seat, "greeter-allow-guest");
225 run_script (Seat *seat, DisplayServer *display_server, const gchar *script_name, User *user)
228 gboolean result = FALSE;
230 script = process_new ();
232 process_set_command (script, script_name);
234 /* Set POSIX variables */
235 process_set_clear_environment (script, TRUE);
236 process_set_env (script, "SHELL", "/bin/sh");
238 /* Variables required for regression tests */
239 if (g_getenv ("LIGHTDM_TEST_ROOT"))
241 process_set_env (script, "LIGHTDM_TEST_ROOT", g_getenv ("LIGHTDM_TEST_ROOT"));
242 process_set_env (script, "LD_PRELOAD", g_getenv ("LD_PRELOAD"));
243 process_set_env (script, "LD_LIBRARY_PATH", g_getenv ("LD_LIBRARY_PATH"));
244 process_set_env (script, "PATH", g_getenv ("PATH"));
247 process_set_env (script, "PATH", "/usr/local/bin:/usr/bin:/bin");
251 process_set_env (script, "USER", user_get_name (user));
252 process_set_env (script, "LOGNAME", user_get_name (user));
253 process_set_env (script, "HOME", user_get_home_directory (user));
256 process_set_env (script, "HOME", "/");
258 SEAT_GET_CLASS (seat)->run_script (seat, display_server, script);
260 if (process_start (script, TRUE))
264 exit_status = process_get_exit_status (script);
265 if (WIFEXITED (exit_status))
267 g_debug ("Exit status of %s: %d", script_name, WEXITSTATUS (exit_status));
268 result = WEXITSTATUS (exit_status) == EXIT_SUCCESS;
272 g_object_unref (script);
278 seat_real_run_script (Seat *seat, DisplayServer *display_server, Process *process)
283 emit_upstart_signal (const gchar *signal)
285 g_return_if_fail (signal != NULL);
286 g_return_if_fail (signal[0] != 0);
291 gchar *cmd = g_strdup_printf ("initctl -q emit %s DISPLAY_MANAGER=lightdm", signal);
292 g_spawn_command_line_async (cmd, NULL); /* OK if it fails, probably not installed */
297 check_stopped (Seat *seat)
299 if (seat->priv->stopping &&
300 !seat->priv->stopped &&
301 g_list_length (seat->priv->display_servers) == 0 &&
302 g_list_length (seat->priv->sessions) == 0)
304 seat->priv->stopped = TRUE;
305 g_debug ("Seat stopped");
306 g_signal_emit (seat, signals[STOPPED], 0);
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 && display_server_get_start_local_sessions (display_server))
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 switch_to_greeter_from_failed_session (Seat *seat, Session *session)
370 Greeter *greeter_session;
371 DisplayServer *display_server;
373 greeter_session = create_greeter_session (seat);
374 if (session_get_is_guest (session))
375 greeter_set_hint (greeter_session, "select-guest", "true");
377 greeter_set_hint (greeter_session, "select-user", session_get_username (session));
378 if (seat->priv->session_to_activate)
379 g_object_unref (seat->priv->session_to_activate);
380 seat->priv->session_to_activate = g_object_ref (greeter_session);
382 if (seat->priv->share_display_server)
383 session_set_display_server (SESSION (greeter_session), session_get_display_server (session));
386 DisplayServer *display_server;
388 display_server = create_display_server (seat);
389 if (!display_server_start (display_server))
391 g_debug ("Failed to start display server for greeter");
395 session_set_display_server (session, display_server);
398 start_session (seat, SESSION (greeter_session));
400 /* Stop failed session */
401 session_stop (session);
405 start_session (Seat *seat, Session *session)
407 Greeter *greeter_session;
409 if (session_start (session))
412 if (IS_GREETER (session))
414 g_debug ("Failed to start greeter");
415 display_server_stop (session_get_display_server (session));
419 g_debug ("Failed to start session, starting greeter");
420 switch_to_greeter_from_failed_session (seat, session);
424 run_session (Seat *seat, Session *session)
428 if (IS_GREETER (session))
429 script = seat_get_string_property (seat, "greeter-setup-script");
431 script = seat_get_string_property (seat, "session-setup-script");
432 if (script && !run_script (seat, session_get_display_server (session), script, NULL))
434 g_debug ("Switching to greeter due to failed setup script");
435 switch_to_greeter_from_failed_session (seat, session);
439 if (!IS_GREETER (session))
440 g_signal_emit (seat, signals[RUNNING_USER_SESSION], 0, session);
442 session_run (session);
444 // FIXME: Wait until the session is ready
446 if (session == seat->priv->session_to_activate)
448 seat_set_active_session (seat, session);
449 g_object_unref (seat->priv->session_to_activate);
450 seat->priv->session_to_activate = NULL;
455 session_authentication_complete_cb (Session *session, Seat *seat)
457 if (session_get_is_authenticated (session))
459 g_debug ("Session authenticated, running command");
460 run_session (seat, session);
462 else if (!IS_GREETER (session))
464 g_debug ("Switching to greeter due to failed authentication");
465 switch_to_greeter_from_failed_session (seat, session);
469 g_debug ("Stopping session that failed authentication");
470 session_stop (session);
475 session_stopped_cb (Session *session, Seat *seat)
477 DisplayServer *display_server;
479 g_debug ("Session stopped");
481 display_server = session_get_display_server (session);
484 if (!IS_GREETER (session))
487 script = seat_get_string_property (seat, "session-cleanup-script");
489 run_script (seat, display_server, script, session_get_user (session));
492 g_signal_handlers_disconnect_matched (session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, seat);
493 seat->priv->sessions = g_list_remove (seat->priv->sessions, session);
495 /* We were waiting for this session, but it didn't start :( */
496 // FIXME: Start a greeter on this?
497 if (session == seat->priv->session_to_activate)
499 g_object_unref (seat->priv->session_to_activate);
500 seat->priv->session_to_activate = NULL;
503 if (seat->priv->stopping)
505 check_stopped (seat);
506 g_object_unref (session);
510 /* If this is the greeter session then re-use this display server */
511 if (IS_GREETER (session) && seat->priv->share_display_server &&
512 greeter_get_start_session (GREETER (session)))
516 for (link = seat->priv->sessions; link; link = link->next)
518 Session *s = link->data;
520 /* Skip this session and sessions on other display servers */
521 if (s == session || session_get_display_server (s) != display_server || session_get_is_stopping (s))
524 if (session_get_is_authenticated (s))
526 g_debug ("Greeter stopped, running session");
527 run_session (seat, s);
531 g_debug ("Greeter stopped, starting session authentication");
532 start_session (seat, s);
537 /* If this is the greeter and nothing else is running then stop the seat */
538 else if (IS_GREETER (session) &&
539 !greeter_get_start_session (GREETER (session)) &&
540 g_list_length (seat->priv->display_servers) == 1 &&
541 g_list_nth_data (seat->priv->display_servers, 0) == display_server)
543 g_debug ("Stopping seat, failed to start a greeter");
546 /* If we were the active session, switch to a greeter */
547 else if (!IS_GREETER (session) && session == seat_get_active_session (seat))
549 g_debug ("Active session stopped, starting greeter");
550 seat_switch_to_greeter (seat);
553 /* Stop the display server if no-longer required */
554 if (display_server && !display_server_get_is_stopping (display_server))
559 for (link = seat->priv->sessions; link; link = link->next)
561 Session *s = link->data;
564 if (session_get_display_server (s) == display_server)
569 g_debug ("Stopping display server, no sessions require it");
570 display_server_stop (display_server);
574 g_signal_emit (seat, signals[SESSION_REMOVED], 0, session);
575 g_object_unref (session);
579 set_session_env (Session *session)
581 /* Connect using the session bus */
584 if (g_getenv ("DBUS_SESSION_BUS_ADDRESS"))
585 session_set_env (session, "DBUS_SESSION_BUS_ADDRESS", g_getenv ("DBUS_SESSION_BUS_ADDRESS"));
586 session_set_env (session, "LDM_BUS", "SESSION");
587 if (g_getenv ("LD_PRELOAD"))
588 session_set_env (session, "LD_PRELOAD", g_getenv ("LD_PRELOAD"));
589 if (g_getenv ("LD_LIBRARY_PATH"))
590 session_set_env (session, "LD_LIBRARY_PATH", g_getenv ("LD_LIBRARY_PATH"));
591 if (g_getenv ("PATH"))
592 session_set_env (session, "PATH", g_getenv ("PATH"));
595 /* Variables required for regression tests */
596 if (g_getenv ("LIGHTDM_TEST_ROOT"))
598 session_set_env (session, "LIGHTDM_TEST_ROOT", g_getenv ("LIGHTDM_TEST_ROOT"));
599 session_set_env (session, "DBUS_SYSTEM_BUS_ADDRESS", g_getenv ("DBUS_SYSTEM_BUS_ADDRESS"));
600 session_set_env (session, "DBUS_SESSION_BUS_ADDRESS", g_getenv ("DBUS_SESSION_BUS_ADDRESS"));
601 session_set_env (session, "LD_PRELOAD", g_getenv ("LD_PRELOAD"));
602 session_set_env (session, "LD_LIBRARY_PATH", g_getenv ("LD_LIBRARY_PATH"));
603 session_set_env (session, "GI_TYPELIB_PATH", g_getenv ("GI_TYPELIB_PATH"));
608 create_session (Seat *seat, gboolean autostart)
612 session = SEAT_GET_CLASS (seat)->create_session (seat);
613 seat->priv->sessions = g_list_append (seat->priv->sessions, session);
615 g_signal_connect (session, "authentication-complete", G_CALLBACK (session_authentication_complete_cb), seat);
616 g_signal_connect (session, "stopped", G_CALLBACK (session_stopped_cb), seat);
618 set_session_env (session);
620 g_signal_emit (seat, signals[SESSION_ADDED], 0, session);
626 get_session_argv_from_filename (const gchar *filename, const gchar *session_wrapper)
628 GKeyFile *session_desktop_file;
631 gchar *command = NULL, **argv, *path;
632 GError *error = NULL;
634 /* Read the command from the .desktop file */
635 session_desktop_file = g_key_file_new ();
636 result = g_key_file_load_from_file (session_desktop_file, filename, G_KEY_FILE_NONE, &error);
638 g_debug ("Failed to load session file %s: %s", filename, error->message);
639 g_clear_error (&error);
642 command = g_key_file_get_string (session_desktop_file, G_KEY_FILE_DESKTOP_GROUP, G_KEY_FILE_DESKTOP_KEY_EXEC, NULL);
644 g_debug ("No command in session file %s", filename);
646 g_key_file_free (session_desktop_file);
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);
662 /* Split command into an array listing and make command absolute */
663 result = g_shell_parse_argv (command, &argc, &argv, &error);
665 g_debug ("Invalid session command '%s': %s", command, error->message);
666 g_clear_error (&error);
670 path = g_find_program_in_path (argv[0]);
681 get_session_argv (const gchar *sessions_dir, const gchar *session_name, const gchar *session_wrapper)
683 gchar **dirs, **argv;
686 g_return_val_if_fail (sessions_dir != NULL, NULL);
687 g_return_val_if_fail (session_name != NULL, NULL);
689 dirs = g_strsplit (sessions_dir, ":", -1);
690 for (i = 0; dirs[i]; i++)
692 gchar *filename, *path;
694 filename = g_strdup_printf ("%s.desktop", session_name);
695 path = g_build_filename (dirs[i], filename, NULL);
697 argv = get_session_argv_from_filename (path, session_wrapper);
708 create_user_session (Seat *seat, const gchar *username)
711 gchar *sessions_dir, **argv;
712 const gchar *session_name, *language;
713 Session *session = NULL;
715 /* Load user preferences */
716 user = accounts_get_user_by_name (username);
719 g_debug ("Can't login unknown user '%s'", username);
722 session_name = user_get_xsession (user);
723 language = user_get_language (user);
726 session_name = seat_get_string_property (seat, "user-session");
727 sessions_dir = config_get_string (config_get_instance (), "LightDM", "sessions-directory");
728 argv = get_session_argv (sessions_dir, session_name, seat_get_string_property (seat, "session-wrapper"));
729 g_free (sessions_dir);
732 session = create_session (seat, TRUE);
733 session_set_env (session, "DESKTOP_SESSION", session_name);
734 session_set_env (session, "GDMSESSION", session_name);
735 if (language && language[0] != '\0')
737 session_set_env (session, "LANG", language);
738 session_set_env (session, "GDM_LANG", language);
740 session_set_pam_service (session, AUTOLOGIN_SERVICE);
741 session_set_username (session, username);
742 session_set_do_authenticate (session, TRUE);
743 session_set_argv (session, argv);
746 g_debug ("Can't find session '%s'", seat_get_string_property (seat, "user-session"));
748 g_object_unref (user);
754 create_guest_session (Seat *seat)
756 gchar *sessions_dir, **argv;
759 sessions_dir = config_get_string (config_get_instance (), "LightDM", "sessions-directory");
760 argv = get_session_argv (sessions_dir,
761 seat_get_string_property (seat, "user-session"),
762 seat_get_string_property (seat, "session-wrapper"));
763 g_free (sessions_dir);
766 g_debug ("Can't find session '%s'", seat_get_string_property (seat, "user-session"));
770 session = create_session (seat, TRUE);
771 session_set_do_authenticate (session, TRUE);
772 session_set_is_guest (session, TRUE);
773 session_set_argv (session, argv);
779 greeter_create_session_cb (Greeter *greeter, Seat *seat)
783 session = create_session (seat, FALSE);
784 session_set_display_server (session, session_get_display_server (SESSION (greeter)));
786 return g_object_ref (session);
790 prepend_argv (gchar ***argv, const gchar *value)
792 gchar **old_argv, **new_argv;
796 new_argv = g_malloc (sizeof (gchar *) * (g_strv_length (*argv) + 2));
797 new_argv[0] = g_strdup (value);
798 for (i = 0; old_argv[i]; i++)
799 new_argv[i + 1] = old_argv[i];
800 new_argv[i + 1] = NULL;
807 find_user_session (Seat *seat, const gchar *username)
814 for (link = seat->priv->sessions; link; link = link->next)
816 Session *session = link->data;
818 if (!session_get_is_stopping (session) && strcmp (session_get_username (session), username) == 0)
826 greeter_start_session_cb (Greeter *greeter, SessionType type, const gchar *session_name, Seat *seat)
828 Session *session, *existing_session;
829 const gchar *username, *language = NULL;
831 gchar *sessions_dir = NULL;
834 /* Get the session to use */
835 if (greeter_get_guest_authenticated (greeter))
837 session = create_guest_session (seat);
840 session_set_pam_service (session, AUTOLOGIN_SERVICE);
843 session = greeter_get_authentication_session (greeter);
845 /* Switch to this session when it is ready */
846 if (seat->priv->session_to_activate)
847 g_object_unref (seat->priv->session_to_activate);
848 seat->priv->session_to_activate = g_object_ref (session);
850 /* Return to existing session if it is open */
851 username = session_get_username (session);
852 existing_session = find_user_session (seat, username);
853 if (existing_session && session != existing_session)
855 g_debug ("Returning to existing user session %s", username);
856 session_stop (session);
857 seat_set_active_session (seat, existing_session);
861 /* Get session command to run */
864 case SESSION_TYPE_LOCAL:
865 sessions_dir = config_get_string (config_get_instance (), "LightDM", "sessions-directory");
867 case SESSION_TYPE_REMOTE:
868 sessions_dir = config_get_string (config_get_instance (), "LightDM", "remote-sessions-directory");
872 /* Load user preferences */
873 user = session_get_user (session);
877 session_name = user_get_xsession (user);
878 language = user_get_language (user);
882 session_name = seat_get_string_property (seat, "user-session");
884 user_set_xsession (session_get_user (session), session_name);
886 argv = get_session_argv (sessions_dir, session_name, seat_get_string_property (seat, "session-wrapper"));
887 g_free (sessions_dir);
891 g_debug ("Can't find session '%s'", seat_get_string_property (seat, "user-session"));
895 session_set_argv (session, argv);
897 session_set_env (session, "DESKTOP_SESSION", session_name);
898 session_set_env (session, "GDMSESSION", session_name);
899 if (language && language[0] != '\0')
901 session_set_env (session, "LANG", language);
902 session_set_env (session, "GDM_LANG", language);
905 /* If can re-use the display server, stop the greeter first */
906 if (seat->priv->share_display_server)
908 /* Run on the same display server after the greeter has stopped */
909 session_set_display_server (session, session_get_display_server (SESSION (greeter)));
911 g_debug ("Stopping greeter");
912 session_stop (SESSION (greeter));
916 /* Otherwise start a new display server for this session */
919 DisplayServer *display_server;
921 display_server = create_display_server (seat);
922 if (!display_server_start (display_server))
925 session_set_display_server (session, display_server);
932 create_greeter_session (Seat *seat)
934 gchar *sessions_dir, **argv;
935 Greeter *greeter_session;
937 const gchar *greeter_wrapper;
939 sessions_dir = config_get_string (config_get_instance (), "LightDM", "greeters-directory");
940 argv = get_session_argv (sessions_dir,
941 seat_get_string_property (seat, "greeter-session"),
942 seat_get_string_property (seat, "session-wrapper"));
943 g_free (sessions_dir);
947 greeter_wrapper = seat_get_string_property (seat, "greeter-wrapper");
951 path = g_find_program_in_path (greeter_wrapper);
952 prepend_argv (&argv, path ? path : greeter_wrapper);
956 greeter_session = SEAT_GET_CLASS (seat)->create_greeter_session (seat);
957 seat->priv->sessions = g_list_append (seat->priv->sessions, SESSION (greeter_session));
958 g_signal_connect (greeter_session, "authentication-complete", G_CALLBACK (session_authentication_complete_cb), seat);
959 g_signal_connect (greeter_session, "stopped", G_CALLBACK (session_stopped_cb), seat);
961 set_session_env (SESSION (greeter_session));
963 session_set_pam_service (SESSION (greeter_session), GREETER_SERVICE);
964 greeter_user = config_get_string (config_get_instance (), "LightDM", "greeter-user");
965 session_set_username (SESSION (greeter_session), greeter_user);
966 g_free (greeter_user);
967 session_set_argv (SESSION (greeter_session), argv);
969 greeter_set_pam_services (greeter_session, USER_SERVICE, AUTOLOGIN_SERVICE);
970 g_signal_connect (greeter_session, "create-session", G_CALLBACK (greeter_create_session_cb), seat);
971 g_signal_connect (greeter_session, "start-session", G_CALLBACK (greeter_start_session_cb), seat);
973 /* Set hints to greeter */
974 greeter_set_hint (greeter_session, "default-session", seat_get_string_property (seat, "user-session"));
975 greeter_set_allow_guest (greeter_session, seat_get_allow_guest (seat));
976 greeter_set_hint (greeter_session, "hide-users", seat_get_boolean_property (seat, "greeter-hide-users") ? "true" : "false");
978 return greeter_session;
982 find_session_for_display_server (Seat *seat, DisplayServer *display_server)
986 for (link = seat->priv->sessions; link; link = link->next)
988 Session *session = link->data;
989 if (session_get_display_server (session) == display_server && !session_get_is_stopping (session))
997 display_server_ready_cb (DisplayServer *display_server, Seat *seat)
1002 /* Run setup script */
1003 script = seat_get_string_property (seat, "display-setup-script");
1004 if (script && !run_script (seat, display_server, script, NULL))
1006 g_debug ("Stopping display server due to failed setup script");
1007 display_server_stop (display_server);
1011 /* Stop if don't need to run a session */
1012 if (!display_server_get_start_local_sessions (display_server))
1015 emit_upstart_signal ("login-session-start");
1017 /* Start the session waiting for this display server */
1018 session = find_session_for_display_server (seat, display_server);
1021 if (session_get_is_authenticated (session))
1023 g_debug ("Display server ready, running session");
1024 run_session (seat, session);
1028 g_debug ("Display server ready, starting session authentication");
1029 start_session (seat, session);
1034 g_debug ("Stopping not required display server");
1035 display_server_stop (display_server);
1039 static DisplayServer *
1040 create_display_server (Seat *seat)
1042 DisplayServer *display_server;
1044 display_server = SEAT_GET_CLASS (seat)->create_display_server (seat);
1045 seat->priv->display_servers = g_list_append (seat->priv->display_servers, display_server);
1046 g_signal_connect (display_server, "ready", G_CALLBACK (display_server_ready_cb), seat);
1047 g_signal_connect (display_server, "stopped", G_CALLBACK (display_server_stopped_cb), seat);
1049 return display_server;
1053 find_greeter_session (Seat *seat)
1057 for (link = seat->priv->sessions; link; link = link->next)
1059 Session *session = link->data;
1060 if (!session_get_is_stopping (session) && IS_GREETER (session))
1061 return GREETER (session);
1068 seat_switch_to_greeter (Seat *seat)
1070 Greeter *greeter_session;
1071 DisplayServer *display_server;
1073 g_return_val_if_fail (seat != NULL, FALSE);
1075 if (!seat->priv->can_switch)
1078 /* Switch to greeter if one open (shouldn't be though) */
1079 greeter_session = find_greeter_session (seat);
1080 if (greeter_session)
1082 g_debug ("Switching to existing greeter");
1083 seat_set_active_session (seat, SESSION (greeter_session));
1087 greeter_session = create_greeter_session (seat);
1088 if (seat->priv->session_to_activate)
1089 g_object_unref (seat->priv->session_to_activate);
1090 seat->priv->session_to_activate = g_object_ref (greeter_session);
1092 display_server = create_display_server (seat);
1093 session_set_display_server (SESSION (greeter_session), display_server);
1094 if (!display_server_start (display_server))
1101 seat_switch_to_user (Seat *seat, const gchar *username, const gchar *session_name)
1104 DisplayServer *display_server;
1106 g_return_val_if_fail (seat != NULL, FALSE);
1107 g_return_val_if_fail (username != NULL, FALSE);
1109 if (!seat->priv->can_switch)
1112 g_debug ("Switching to user %s", username);
1114 session = find_user_session (seat, username);
1117 g_debug ("Switching to existing user session %s", username);
1118 seat_set_active_session (seat, session);
1122 session = create_user_session (seat, username);
1125 if (seat->priv->session_to_activate)
1126 g_object_unref (seat->priv->session_to_activate);
1127 seat->priv->session_to_activate = g_object_ref (session);
1128 session_set_pam_service (session, USER_SERVICE);
1130 display_server = create_display_server (seat);
1131 session_set_display_server (session, display_server);
1132 if (!display_server_start (display_server))
1139 find_guest_session (Seat *seat)
1143 for (link = seat->priv->sessions; link; link = link->next)
1145 Session *session = link->data;
1146 if (!session_get_is_stopping (session) && session_get_is_guest (session))
1154 seat_switch_to_guest (Seat *seat, const gchar *session_name)
1157 DisplayServer *display_server;
1160 g_return_val_if_fail (seat != NULL, FALSE);
1162 if (!seat->priv->can_switch || !seat_get_allow_guest (seat))
1165 /* Switch to session if one open */
1166 session = find_guest_session (seat);
1169 g_debug ("Switching to existing guest account %s", session_get_username (session));
1170 seat_set_active_session (seat, session);
1174 display_server = create_display_server (seat);
1175 if (!display_server_start (display_server))
1178 session = create_guest_session (seat);
1181 if (seat->priv->session_to_activate)
1182 g_object_unref (seat->priv->session_to_activate);
1183 seat->priv->session_to_activate = g_object_ref (session);
1184 session_set_pam_service (session, AUTOLOGIN_SERVICE);
1185 session_set_display_server (session, display_server);
1191 seat_lock (Seat *seat, const gchar *username)
1193 Greeter *greeter_session;
1194 DisplayServer *display_server;
1196 g_return_val_if_fail (seat != NULL, FALSE);
1198 if (!seat->priv->can_switch)
1201 g_debug ("Locking seat");
1203 /* Switch to greeter if one open (shouldn't be though) */
1204 greeter_session = find_greeter_session (seat);
1205 if (greeter_session)
1207 g_debug ("Switching to existing greeter");
1208 seat_set_active_session (seat, SESSION (greeter_session));
1212 display_server = create_display_server (seat);
1213 if (!display_server_start (display_server))
1216 greeter_session = create_greeter_session (seat);
1217 if (seat->priv->session_to_activate)
1218 g_object_unref (seat->priv->session_to_activate);
1219 seat->priv->session_to_activate = g_object_ref (greeter_session);
1220 greeter_set_hint (greeter_session, "lock-screen", "true");
1222 greeter_set_hint (greeter_session, "select-user", username);
1223 session_set_display_server (SESSION (greeter_session), display_server);
1229 seat_stop (Seat *seat)
1231 g_return_if_fail (seat != NULL);
1233 if (seat->priv->stopping)
1236 g_debug ("Stopping seat");
1237 seat->priv->stopping = TRUE;
1238 SEAT_GET_CLASS (seat)->stop (seat);
1242 seat_get_is_stopping (Seat *seat)
1244 g_return_val_if_fail (seat != NULL, FALSE);
1245 return seat->priv->stopping;
1249 seat_real_setup (Seat *seat)
1254 seat_real_start (Seat *seat)
1256 const gchar *autologin_username;
1257 int autologin_timeout;
1258 gboolean autologin_guest;
1259 gboolean autologin_in_background;
1260 const gchar *user_session;
1261 Session *session = NULL;
1262 DisplayServer *display_server;
1264 gchar *sessions_dir;
1265 const gchar *wrapper = NULL;
1266 const gchar *session_name = NULL;
1268 g_debug ("Starting seat");
1270 display_server = create_display_server (seat);
1272 /* If this display server doesn't have a session running on it, just start it */
1273 if (!display_server_get_start_local_sessions (display_server))
1274 return display_server_start (display_server);
1276 /* Get autologin settings */
1277 autologin_username = seat_get_string_property (seat, "autologin-user");
1278 if (g_strcmp0 (autologin_username, "") == 0)
1279 autologin_username = NULL;
1280 autologin_timeout = seat_get_integer_property (seat, "autologin-user-timeout");
1281 autologin_guest = seat_get_boolean_property (seat, "autologin-guest");
1282 autologin_in_background = seat_get_boolean_property (seat, "autologin-in-background");
1284 /* Autologin if configured */
1285 if (autologin_timeout == 0 || autologin_in_background)
1287 if (autologin_guest)
1288 session = create_guest_session (seat);
1289 else if (autologin_username != NULL)
1290 session = create_user_session (seat, autologin_username);
1294 if (seat->priv->session_to_activate)
1295 g_object_unref (seat->priv->session_to_activate);
1296 seat->priv->session_to_activate = g_object_ref (session);
1297 session_set_pam_service (session, AUTOLOGIN_SERVICE);
1300 /* Load in background if required */
1301 if (autologin_in_background && session)
1303 DisplayServer *background_display_server;
1305 background_display_server = create_display_server (seat);
1306 session_set_display_server (session, background_display_server);
1307 if (!display_server_start (background_display_server))
1310 /* Start a greeter as well */
1315 /* Fallback to a greeter */
1318 Greeter *greeter_session;
1320 greeter_session = create_greeter_session (seat);
1321 if (seat->priv->session_to_activate)
1322 g_object_unref (seat->priv->session_to_activate);
1323 seat->priv->session_to_activate = g_object_ref (greeter_session);
1324 session = SESSION (greeter_session);
1326 if (autologin_timeout)
1330 value = g_strdup_printf ("%d", autologin_timeout);
1331 greeter_set_hint (greeter_session, "autologin-timeout", value);
1333 if (autologin_username)
1334 greeter_set_hint (greeter_session, "autologin-user", autologin_username);
1335 if (autologin_guest)
1336 greeter_set_hint (greeter_session, "autologin-guest", "true");
1340 /* Fail if can't start a session */
1347 /* Start display server to show session on */
1348 session_set_display_server (session, display_server);
1349 if (!display_server_start (display_server))
1356 seat_real_set_active_session (Seat *seat, Session *session)
1361 seat_real_get_active_session (Seat *seat)
1367 seat_real_stop (Seat *seat)
1371 check_stopped (seat);
1372 if (seat->priv->stopped)
1375 /* Stop all the display servers and sessions on the seat. Copy the list as
1376 * it might be modified if a display server / session stops during this loop */
1377 list = g_list_copy (seat->priv->display_servers);
1378 for (link = list; link; link = link->next)
1379 g_object_ref (link->data);
1380 for (link = list; link; link = link->next)
1382 DisplayServer *display_server = link->data;
1383 if (!display_server_get_is_stopping (display_server))
1385 g_debug ("Stopping display server");
1386 display_server_stop (display_server);
1389 g_list_free_full (list, g_object_unref);
1390 list = g_list_copy (seat->priv->sessions);
1391 for (link = list; link; link = link->next)
1392 g_object_ref (link->data);
1393 for (link = list; link; link = link->next)
1395 Session *session = link->data;
1396 if (!session_get_is_stopping (session))
1398 g_debug ("Stopping session");
1399 session_stop (session);
1402 g_list_free_full (list, g_object_unref);
1406 seat_init (Seat *seat)
1408 seat->priv = G_TYPE_INSTANCE_GET_PRIVATE (seat, SEAT_TYPE, SeatPrivate);
1409 seat->priv->properties = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
1410 seat->priv->share_display_server = TRUE;
1414 seat_finalize (GObject *object)
1419 self = SEAT (object);
1421 g_hash_table_unref (self->priv->properties);
1422 for (link = self->priv->display_servers; link; link = link->next)
1424 DisplayServer *display_server = link->data;
1425 g_signal_handlers_disconnect_matched (display_server, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, self);
1427 g_list_free_full (self->priv->display_servers, g_object_unref);
1428 for (link = self->priv->sessions; link; link = link->next)
1430 Session *session = link->data;
1431 g_signal_handlers_disconnect_matched (session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, self);
1433 g_list_free_full (self->priv->sessions, g_object_unref);
1434 if (self->priv->session_to_activate)
1435 g_object_unref (self->priv->session_to_activate);
1437 G_OBJECT_CLASS (seat_parent_class)->finalize (object);
1441 seat_class_init (SeatClass *klass)
1443 GObjectClass *object_class = G_OBJECT_CLASS (klass);
1445 klass->setup = seat_real_setup;
1446 klass->start = seat_real_start;
1447 klass->set_active_session = seat_real_set_active_session;
1448 klass->get_active_session = seat_real_get_active_session;
1449 klass->run_script = seat_real_run_script;
1450 klass->stop = seat_real_stop;
1452 object_class->finalize = seat_finalize;
1454 g_type_class_add_private (klass, sizeof (SeatPrivate));
1456 signals[SESSION_ADDED] =
1457 g_signal_new ("session-added",
1458 G_TYPE_FROM_CLASS (klass),
1460 G_STRUCT_OFFSET (SeatClass, session_added),
1463 G_TYPE_NONE, 1, SESSION_TYPE);
1464 signals[RUNNING_USER_SESSION] =
1465 g_signal_new ("running-user-session",
1466 G_TYPE_FROM_CLASS (klass),
1468 G_STRUCT_OFFSET (SeatClass, running_user_session),
1471 G_TYPE_NONE, 1, SESSION_TYPE);
1472 signals[SESSION_REMOVED] =
1473 g_signal_new ("session-removed",
1474 G_TYPE_FROM_CLASS (klass),
1476 G_STRUCT_OFFSET (SeatClass, session_removed),
1479 G_TYPE_NONE, 1, SESSION_TYPE);
1481 g_signal_new ("stopped",
1482 G_TYPE_FROM_CLASS (klass),
1484 G_STRUCT_OFFSET (SeatClass, stopped),