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"
27 static guint signals[LAST_SIGNAL] = { 0 };
31 /* Configuration for this seat */
32 GHashTable *properties;
34 /* TRUE if able to switch users */
37 /* TRUE if display server can be shared for sessions */
38 gboolean share_display_server;
40 /* The display servers on this seat */
41 GList *display_servers;
43 /* The sessions on this seat */
46 /* The session to set active when it starts */
47 Session *session_to_activate;
49 /* TRUE if stopping this seat (waiting for displays to stop) */
56 /* PAM services to use */
57 #define GREETER_SERVICE "lightdm-greeter"
58 #define USER_SERVICE "lightdm"
59 #define AUTOLOGIN_SERVICE "lightdm-autologin"
61 G_DEFINE_TYPE (Seat, seat, G_TYPE_OBJECT);
68 static GHashTable *seat_modules = NULL;
70 // FIXME: Make a get_display_server() that re-uses display servers if supported
71 static DisplayServer *create_display_server (Seat *seat);
72 static Greeter *create_greeter_session (Seat *seat);
75 seat_register_module (const gchar *name, GType type)
80 seat_modules = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
82 g_debug ("Registered seat module %s", name);
84 module = g_malloc0 (sizeof (SeatModule));
85 module->name = g_strdup (name);
87 g_hash_table_insert (seat_modules, g_strdup (name), module);
91 seat_new (const gchar *module_name)
96 g_return_val_if_fail (module_name != NULL, NULL);
99 m = g_hash_table_lookup (seat_modules, module_name);
103 seat = g_object_new (m->type, NULL);
109 seat_set_property (Seat *seat, const gchar *name, const gchar *value)
111 g_return_if_fail (seat != NULL);
112 g_hash_table_insert (seat->priv->properties, g_strdup (name), g_strdup (value));
116 seat_get_string_property (Seat *seat, const gchar *name)
118 g_return_val_if_fail (seat != NULL, NULL);
119 return g_hash_table_lookup (seat->priv->properties, name);
123 seat_get_boolean_property (Seat *seat, const gchar *name)
125 return g_strcmp0 (seat_get_string_property (seat, name), "true") == 0;
129 seat_get_integer_property (Seat *seat, const gchar *name)
133 value = seat_get_string_property (seat, name);
134 return value ? atoi (value) : 0;
138 seat_set_can_switch (Seat *seat, gboolean can_switch)
140 g_return_if_fail (seat != NULL);
142 seat->priv->can_switch = can_switch;
146 seat_set_share_display_server (Seat *seat, gboolean share_display_server)
148 g_return_if_fail (seat != NULL);
150 seat->priv->share_display_server = share_display_server;
154 seat_start (Seat *seat)
156 g_return_val_if_fail (seat != NULL, FALSE);
158 SEAT_GET_CLASS (seat)->setup (seat);
159 return SEAT_GET_CLASS (seat)->start (seat);
163 seat_get_sessions (Seat *seat)
165 g_return_val_if_fail (seat != NULL, NULL);
166 return seat->priv->sessions;
170 seat_set_active_session (Seat *seat, Session *session)
174 g_return_if_fail (seat != NULL);
176 SEAT_GET_CLASS (seat)->set_active_session (seat, session);
178 /* Stop any greeters */
179 for (link = seat->priv->sessions; link; link = link->next)
181 Session *s = link->data;
183 if (s == session || session_get_is_stopping (s))
188 g_debug ("Stopping greeter");
195 seat_get_active_session (Seat *seat)
197 g_return_val_if_fail (seat != NULL, NULL);
198 return SEAT_GET_CLASS (seat)->get_active_session (seat);
202 seat_get_can_switch (Seat *seat)
204 g_return_val_if_fail (seat != NULL, FALSE);
205 return seat->priv->can_switch;
209 seat_get_allow_guest (Seat *seat)
211 g_return_val_if_fail (seat != NULL, FALSE);
212 return seat_get_boolean_property (seat, "allow-guest") && guest_account_is_installed ();
216 seat_get_greeter_allow_guest (Seat *seat)
218 g_return_val_if_fail (seat != NULL, FALSE);
219 return seat_get_allow_guest (seat) && seat_get_boolean_property (seat, "greeter-allow-guest");
223 run_script (Seat *seat, DisplayServer *display_server, const gchar *script_name, User *user)
226 gboolean result = FALSE;
228 script = process_new ();
230 process_set_command (script, script_name);
232 /* Set POSIX variables */
233 process_set_clear_environment (script, TRUE);
234 process_set_env (script, "SHELL", "/bin/sh");
236 /* Variables required for regression tests */
237 if (g_getenv ("LIGHTDM_TEST_ROOT"))
239 process_set_env (script, "LIGHTDM_TEST_ROOT", g_getenv ("LIGHTDM_TEST_ROOT"));
240 process_set_env (script, "LD_PRELOAD", g_getenv ("LD_PRELOAD"));
241 process_set_env (script, "LD_LIBRARY_PATH", g_getenv ("LD_LIBRARY_PATH"));
242 process_set_env (script, "PATH", g_getenv ("PATH"));
245 process_set_env (script, "PATH", "/usr/local/bin:/usr/bin:/bin");
249 process_set_env (script, "USER", user_get_name (user));
250 process_set_env (script, "LOGNAME", user_get_name (user));
251 process_set_env (script, "HOME", user_get_home_directory (user));
254 process_set_env (script, "HOME", "/");
256 SEAT_GET_CLASS (seat)->run_script (seat, display_server, script);
258 if (process_start (script, TRUE))
262 exit_status = process_get_exit_status (script);
263 if (WIFEXITED (exit_status))
265 g_debug ("Exit status of %s: %d", script_name, WEXITSTATUS (exit_status));
266 result = WEXITSTATUS (exit_status) == EXIT_SUCCESS;
270 g_object_unref (script);
276 seat_real_run_script (Seat *seat, DisplayServer *display_server, Process *process)
281 emit_upstart_signal (const gchar *signal)
283 g_return_if_fail (signal != NULL);
284 g_return_if_fail (signal[0] != 0);
289 gchar *cmd = g_strdup_printf ("initctl -q emit %s DISPLAY_MANAGER=lightdm", signal);
290 g_spawn_command_line_async (cmd, NULL); /* OK if it fails, probably not installed */
295 check_stopped (Seat *seat)
297 if (seat->priv->stopping &&
298 !seat->priv->stopped &&
299 g_list_length (seat->priv->display_servers) == 0 &&
300 g_list_length (seat->priv->sessions) == 0)
302 seat->priv->stopped = TRUE;
303 g_debug ("Seat stopped");
304 g_signal_emit (seat, signals[STOPPED], 0);
309 display_server_stopped_cb (DisplayServer *display_server, Seat *seat)
312 Session *active_session;
314 g_debug ("Display server stopped");
316 g_signal_handlers_disconnect_matched (display_server, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, seat);
317 seat->priv->display_servers = g_list_remove (seat->priv->display_servers, display_server);
319 if (seat->priv->stopping)
321 check_stopped (seat);
322 g_object_unref (display_server);
326 /* Stop all sessions on this display server */
327 for (link = seat->priv->sessions; link; link = link->next)
329 Session *session = link->data;
331 if (session_get_display_server (session) != display_server || session_get_is_stopping (session))
334 /* Stop seat if this is the only display server and it failed to start a greeter */
335 if (IS_GREETER (session) &&
336 !session_get_is_started (session) &&
337 g_list_length (seat->priv->display_servers) == 0)
339 g_debug ("Stopping seat, greeter display server failed to start");
343 g_debug ("Stopping session");
344 session_stop (session);
347 /* If we were the active session, switch to a greeter */
348 active_session = seat_get_active_session (seat);
349 if (!active_session || session_get_display_server (active_session) == display_server)
351 g_debug ("Active display server stopped, starting greeter");
352 seat_switch_to_greeter (seat);
355 g_object_unref (display_server);
359 start_session (Seat *seat, Session *session)
361 Greeter *greeter_session;
363 if (session_start (session))
366 if (IS_GREETER (session))
368 g_debug ("Failed to start greeter");
369 display_server_stop (session_get_display_server (session));
373 g_debug ("Failed to start session, starting greeter");
374 greeter_session = create_greeter_session (seat);
375 if (seat->priv->session_to_activate)
376 g_object_unref (seat->priv->session_to_activate);
377 seat->priv->session_to_activate = g_object_ref (greeter_session);
378 // FIXME: Only if can re-use
379 session_set_display_server (SESSION (greeter_session), session_get_display_server (session));
381 start_session (seat, SESSION (greeter_session));
385 run_session (Seat *seat, Session *session)
389 if (IS_GREETER (session))
390 script = seat_get_string_property (seat, "greeter-setup-script");
392 script = seat_get_string_property (seat, "session-setup-script");
393 if (script && !run_script (seat, session_get_display_server (session), script, NULL))
395 Greeter *greeter_session;
397 g_debug ("Switching to greeter due to failed setup script");
399 // FIXME: Only if can share servers
401 greeter_session = create_greeter_session (seat);
402 if (seat->priv->session_to_activate)
403 g_object_unref (seat->priv->session_to_activate);
404 seat->priv->session_to_activate = g_object_ref (greeter_session);
405 session_set_display_server (SESSION (greeter_session), session_get_display_server (session));
407 start_session (seat, SESSION (greeter_session));
409 /* Stop failed session */
410 session_stop (session);
414 session_run (session);
416 // FIXME: Wait until the session is ready
418 if (session == seat->priv->session_to_activate)
420 seat_set_active_session (seat, session);
421 g_object_unref (seat->priv->session_to_activate);
422 seat->priv->session_to_activate = NULL;
428 session_authentication_complete_cb (Session *session, Seat *seat)
430 if (session_get_is_authenticated (session))
432 g_debug ("Session authenticated, running command");
433 run_session (seat, session);
435 else if (!IS_GREETER (session))
437 Greeter *greeter_session;
439 g_debug ("Switching to greeter due to failed authentication");
441 // FIXME: Only if can share servers
443 greeter_session = create_greeter_session (seat);
444 if (seat->priv->session_to_activate)
445 g_object_unref (seat->priv->session_to_activate);
446 seat->priv->session_to_activate = g_object_ref (greeter_session);
447 if (session_get_is_guest (session))
448 greeter_set_hint (greeter_session, "select-guest", "true");
450 greeter_set_hint (greeter_session, "select-user", session_get_username (session));
451 session_set_display_server (SESSION (greeter_session), session_get_display_server (session));
453 start_session (seat, SESSION (greeter_session));
455 /* Stop failed session */
456 session_stop (session);
460 g_debug ("Stopping session that failed authentication");
461 session_stop (session);
466 session_stopped_cb (Session *session, Seat *seat)
468 DisplayServer *display_server;
470 g_debug ("Session stopped");
472 display_server = session_get_display_server (session);
475 if (!IS_GREETER (session))
478 script = seat_get_string_property (seat, "session-cleanup-script");
480 run_script (seat, display_server, script, session_get_user (session));
483 g_signal_handlers_disconnect_matched (session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, seat);
484 seat->priv->sessions = g_list_remove (seat->priv->sessions, session);
486 /* We were waiting for this session, but it didn't start :( */
487 // FIXME: Start a greeter on this?
488 if (session == seat->priv->session_to_activate)
490 g_object_unref (seat->priv->session_to_activate);
491 seat->priv->session_to_activate = NULL;
494 if (seat->priv->stopping)
496 check_stopped (seat);
497 g_object_unref (session);
501 /* If this is the greeter session then re-use this display server */
502 if (IS_GREETER (session) && seat->priv->share_display_server &&
503 greeter_get_start_session (GREETER (session)))
507 for (link = seat->priv->sessions; link; link = link->next)
509 Session *s = link->data;
511 /* Skip this session and sessions on other display servers */
512 if (s == session || session_get_display_server (s) != display_server || session_get_is_stopping (s))
515 if (session_get_is_authenticated (s))
517 g_debug ("Greeter stopped, running session");
518 run_session (seat, s);
522 g_debug ("Greeter stopped, starting session authentication");
523 start_session (seat, s);
528 /* If this is the greeter and nothing else is running then stop the seat */
529 else if (IS_GREETER (session) &&
530 !greeter_get_start_session (GREETER (session)) &&
531 g_list_length (seat->priv->display_servers) == 1 &&
532 g_list_nth_data (seat->priv->display_servers, 0) == display_server)
534 g_debug ("Stopping seat, failed to start a greeter");
537 /* If we were the active session, switch to a greeter */
538 else if (!IS_GREETER (session) && session == seat_get_active_session (seat))
540 g_debug ("Active session stopped, starting greeter");
541 seat_switch_to_greeter (seat);
544 /* Stop the display server if no-longer required */
545 if (display_server && !display_server_get_is_stopping (display_server))
550 for (link = seat->priv->sessions; link; link = link->next)
552 Session *s = link->data;
555 if (session_get_display_server (s) == display_server)
560 g_debug ("Stopping display server, no sessions require it");
561 display_server_stop (display_server);
565 g_object_unref (session);
569 set_session_env (Session *session)
571 /* Variables required for regression tests */
572 if (g_getenv ("LIGHTDM_TEST_ROOT"))
574 session_set_env (session, "LIGHTDM_TEST_ROOT", g_getenv ("LIGHTDM_TEST_ROOT"));
575 session_set_env (session, "DBUS_SYSTEM_BUS_ADDRESS", g_getenv ("DBUS_SYSTEM_BUS_ADDRESS"));
576 session_set_env (session, "DBUS_SESSION_BUS_ADDRESS", g_getenv ("DBUS_SESSION_BUS_ADDRESS"));
577 session_set_env (session, "LD_PRELOAD", g_getenv ("LD_PRELOAD"));
578 session_set_env (session, "LD_LIBRARY_PATH", g_getenv ("LD_LIBRARY_PATH"));
579 session_set_env (session, "GI_TYPELIB_PATH", g_getenv ("GI_TYPELIB_PATH"));
584 create_session (Seat *seat, gboolean autostart)
588 session = SEAT_GET_CLASS (seat)->create_session (seat);
589 seat->priv->sessions = g_list_append (seat->priv->sessions, session);
591 g_signal_connect (session, "authentication-complete", G_CALLBACK (session_authentication_complete_cb), seat);
592 g_signal_connect (session, "stopped", G_CALLBACK (session_stopped_cb), seat);
594 set_session_env (session);
600 get_session_argv_from_filename (const gchar *filename, const gchar *session_wrapper)
602 GKeyFile *session_desktop_file;
605 gchar *command = NULL, **argv, *path;
606 GError *error = NULL;
608 /* Read the command from the .desktop file */
609 session_desktop_file = g_key_file_new ();
610 result = g_key_file_load_from_file (session_desktop_file, filename, G_KEY_FILE_NONE, &error);
612 g_debug ("Failed to load session file %s: %s", filename, error->message);
613 g_clear_error (&error);
616 command = g_key_file_get_string (session_desktop_file, G_KEY_FILE_DESKTOP_GROUP, G_KEY_FILE_DESKTOP_KEY_EXEC, NULL);
618 g_debug ("No command in session file %s", filename);
620 g_key_file_free (session_desktop_file);
625 /* If configured, run sessions through a wrapper */
628 argv = g_malloc (sizeof (gchar *) * 3);
629 path = g_find_program_in_path (session_wrapper);
630 argv[0] = path ? path : g_strdup (session_wrapper);
636 /* Split command into an array listing and make command absolute */
637 result = g_shell_parse_argv (command, &argc, &argv, &error);
639 g_debug ("Invalid session command '%s': %s", command, error->message);
640 g_clear_error (&error);
644 path = g_find_program_in_path (argv[0]);
655 get_session_argv (const gchar *sessions_dir, const gchar *session_name, const gchar *session_wrapper)
657 gchar **dirs, **argv;
660 g_return_val_if_fail (sessions_dir != NULL, NULL);
661 g_return_val_if_fail (session_name != NULL, NULL);
663 dirs = g_strsplit (sessions_dir, ":", -1);
664 for (i = 0; dirs[i]; i++)
666 gchar *filename, *path;
668 filename = g_strdup_printf ("%s.desktop", session_name);
669 path = g_build_filename (dirs[i], filename, NULL);
671 argv = get_session_argv_from_filename (path, session_wrapper);
682 create_user_session (Seat *seat, const gchar *username)
685 gchar *sessions_dir, **argv;
686 const gchar *session_name;
689 user = accounts_get_user_by_name (username);
692 g_debug ("Can't login unknown user '%s'", username);
696 session_name = user_get_xsession (user);
697 g_object_unref (user);
699 session_name = seat_get_string_property (seat, "user-session");
700 sessions_dir = config_get_string (config_get_instance (), "LightDM", "sessions-directory");
701 argv = get_session_argv (sessions_dir, session_name, seat_get_string_property (seat, "session-wrapper"));
702 g_free (sessions_dir);
705 g_debug ("Can't find session '%s'", seat_get_string_property (seat, "user-session"));
709 session = create_session (seat, TRUE);
710 session_set_pam_service (session, AUTOLOGIN_SERVICE);
711 session_set_username (session, username);
712 session_set_do_authenticate (session, TRUE);
713 session_set_argv (session, argv);
719 create_guest_session (Seat *seat)
721 gchar *sessions_dir, **argv;
724 sessions_dir = config_get_string (config_get_instance (), "LightDM", "sessions-directory");
725 argv = get_session_argv (sessions_dir,
726 seat_get_string_property (seat, "user-session"),
727 seat_get_string_property (seat, "session-wrapper"));
728 g_free (sessions_dir);
731 g_debug ("Can't find session '%s'", seat_get_string_property (seat, "user-session"));
735 session = create_session (seat, TRUE);
736 session_set_do_authenticate (session, TRUE);
737 session_set_is_guest (session, TRUE);
738 session_set_argv (session, argv);
744 greeter_create_session_cb (Greeter *greeter, Seat *seat)
748 session = create_session (seat, FALSE);
749 session_set_display_server (session, session_get_display_server (SESSION (greeter)));
751 return g_object_ref (session);
755 prepend_argv (gchar ***argv, const gchar *value)
757 gchar **old_argv, **new_argv;
761 new_argv = g_malloc (sizeof (gchar *) * (g_strv_length (*argv) + 2));
762 new_argv[0] = g_strdup (value);
763 for (i = 0; old_argv[i]; i++)
764 new_argv[i + 1] = old_argv[i];
765 new_argv[i + 1] = NULL;
772 find_user_session (Seat *seat, const gchar *username)
779 for (link = seat->priv->sessions; link; link = link->next)
781 Session *session = link->data;
783 if (!session_get_is_stopping (session) && strcmp (session_get_username (session), username) == 0)
791 greeter_start_session_cb (Greeter *greeter, SessionType type, const gchar *session_name, Seat *seat)
793 Session *session, *existing_session;
794 const gchar *username;
796 gchar *sessions_dir = NULL;
799 /* Get the session to use */
800 if (greeter_get_guest_authenticated (greeter))
802 session = create_guest_session (seat);
803 if (seat->priv->session_to_activate)
804 g_object_unref (seat->priv->session_to_activate);
805 seat->priv->session_to_activate = g_object_ref (session);
806 session_set_pam_service (session, AUTOLOGIN_SERVICE);
809 session = greeter_get_authentication_session (greeter);
811 /* Return to existing session if it is open */
812 username = session_get_username (session);
813 existing_session = find_user_session (seat, username);
814 if (existing_session && session != existing_session)
816 g_debug ("Returning to existing user session %s", username);
817 session_stop (session);
818 seat_set_active_session (seat, existing_session);
822 /* Get session command to run */
825 case SESSION_TYPE_LOCAL:
826 sessions_dir = config_get_string (config_get_instance (), "LightDM", "sessions-directory");
828 case SESSION_TYPE_REMOTE:
829 sessions_dir = config_get_string (config_get_instance (), "LightDM", "remote-sessions-directory");
832 user = session_get_user (session);
833 if (!session_name && user)
834 session_name = user_get_xsession (user);
836 session_name = seat_get_string_property (seat, "user-session");
838 user_set_xsession (session_get_user (session), session_name);
839 argv = get_session_argv (sessions_dir, session_name, seat_get_string_property (seat, "session-wrapper"));
840 g_free (sessions_dir);
844 g_debug ("Can't find session '%s'", seat_get_string_property (seat, "user-session"));
848 session_set_argv (session, argv);
851 /* If no session information found, then can't start the session */
854 g_debug ("Can't find greeter session '%s'", session_name);
858 /* If can re-use the display server, stop the greeter first */
859 if (seat->priv->share_display_server)
861 /* Run on the same display server after the greeter has stopped */
862 session_set_display_server (session, session_get_display_server (SESSION (greeter)));
864 g_debug ("Stopping greeter");
865 session_stop (SESSION (greeter));
869 /* Otherwise start a new display server for this session */
872 DisplayServer *display_server;
874 display_server = create_display_server (seat);
875 if (!display_server_start (display_server))
878 session_set_display_server (session, display_server);
885 create_greeter_session (Seat *seat)
887 gchar *sessions_dir, **argv;
888 Greeter *greeter_session;
890 const gchar *greeter_wrapper;
892 sessions_dir = config_get_string (config_get_instance (), "LightDM", "greeters-directory");
893 argv = get_session_argv (sessions_dir,
894 seat_get_string_property (seat, "greeter-session"),
895 seat_get_string_property (seat, "session-wrapper"));
896 g_free (sessions_dir);
900 greeter_wrapper = seat_get_string_property (seat, "greeter-wrapper");
904 path = g_find_program_in_path (greeter_wrapper);
905 prepend_argv (&argv, path ? path : greeter_wrapper);
909 greeter_session = SEAT_GET_CLASS (seat)->create_greeter_session (seat);
910 seat->priv->sessions = g_list_append (seat->priv->sessions, SESSION (greeter_session));
911 g_signal_connect (greeter_session, "authentication-complete", G_CALLBACK (session_authentication_complete_cb), seat);
912 g_signal_connect (greeter_session, "stopped", G_CALLBACK (session_stopped_cb), seat);
914 set_session_env (SESSION (greeter_session));
916 session_set_pam_service (SESSION (greeter_session), GREETER_SERVICE);
917 greeter_user = config_get_string (config_get_instance (), "LightDM", "greeter-user");
918 session_set_username (SESSION (greeter_session), greeter_user);
919 g_free (greeter_user);
920 session_set_argv (SESSION (greeter_session), argv);
922 greeter_set_pam_services (greeter_session, USER_SERVICE, AUTOLOGIN_SERVICE);
923 greeter_set_allow_guest (greeter_session, seat_get_allow_guest (seat));
924 g_signal_connect (greeter_session, "create-session", G_CALLBACK (greeter_create_session_cb), seat);
925 g_signal_connect (greeter_session, "start-session", G_CALLBACK (greeter_start_session_cb), seat);
927 return greeter_session;
931 display_server_ready_cb (DisplayServer *display_server, Seat *seat)
935 gboolean used_display_server = FALSE;
937 /* Run setup script */
938 script = seat_get_string_property (seat, "display-setup-script");
939 if (script && !run_script (seat, display_server, script, NULL))
941 g_debug ("Stopping display server due to failed setup script");
942 display_server_stop (display_server);
946 emit_upstart_signal ("login-session-start");
948 /* Start the sessions waiting for this display server */
949 for (link = seat->priv->sessions; link; link = link->next)
951 Session *session = link->data;
953 if (session_get_display_server (session) != display_server || session_get_is_stopping (session))
956 if (session_get_is_authenticated (session))
958 g_debug ("Display server ready, running session");
959 run_session (seat, session);
963 g_debug ("Display server ready, starting session authentication");
964 // FIXME: Can modify sessions
965 start_session (seat, session);
967 used_display_server = TRUE;
970 if (!used_display_server)
972 g_debug ("Stopping not required display server");
973 display_server_stop (display_server);
977 static DisplayServer *
978 create_display_server (Seat *seat)
980 DisplayServer *display_server;
982 display_server = SEAT_GET_CLASS (seat)->create_display_server (seat);
983 seat->priv->display_servers = g_list_append (seat->priv->display_servers, display_server);
984 g_signal_connect (display_server, "ready", G_CALLBACK (display_server_ready_cb), seat);
985 g_signal_connect (display_server, "stopped", G_CALLBACK (display_server_stopped_cb), seat);
987 return display_server;
991 find_greeter_session (Seat *seat)
995 for (link = seat->priv->sessions; link; link = link->next)
997 Session *session = link->data;
998 if (!session_get_is_stopping (session) && IS_GREETER (session))
999 return GREETER (session);
1006 seat_switch_to_greeter (Seat *seat)
1008 Greeter *greeter_session;
1009 DisplayServer *display_server;
1011 g_return_val_if_fail (seat != NULL, FALSE);
1013 if (!seat->priv->can_switch)
1016 /* Switch to greeter if one open (shouldn't be though) */
1017 greeter_session = find_greeter_session (seat);
1018 if (greeter_session)
1020 g_debug ("Switching to existing greeter");
1021 seat_set_active_session (seat, SESSION (greeter_session));
1025 greeter_session = create_greeter_session (seat);
1026 if (seat->priv->session_to_activate)
1027 g_object_unref (seat->priv->session_to_activate);
1028 seat->priv->session_to_activate = g_object_ref (greeter_session);
1030 display_server = create_display_server (seat);
1031 session_set_display_server (SESSION (greeter_session), display_server);
1032 if (!display_server_start (display_server))
1039 seat_switch_to_user (Seat *seat, const gchar *username, const gchar *session_name)
1042 DisplayServer *display_server;
1044 g_return_val_if_fail (seat != NULL, FALSE);
1045 g_return_val_if_fail (username != NULL, FALSE);
1047 if (!seat->priv->can_switch)
1050 g_debug ("Switching to user %s", username);
1052 session = find_user_session (seat, username);
1055 g_debug ("Switching to existing user session %s", username);
1056 seat_set_active_session (seat, session);
1060 session = create_user_session (seat, username);
1061 if (seat->priv->session_to_activate)
1062 g_object_unref (seat->priv->session_to_activate);
1063 seat->priv->session_to_activate = g_object_ref (session);
1064 session_set_pam_service (session, USER_SERVICE);
1066 display_server = create_display_server (seat);
1067 session_set_display_server (session, display_server);
1068 if (!display_server_start (display_server))
1075 find_guest_session (Seat *seat)
1079 for (link = seat->priv->sessions; link; link = link->next)
1081 Session *session = link->data;
1082 if (!session_get_is_stopping (session) && session_get_is_guest (session))
1090 seat_switch_to_guest (Seat *seat, const gchar *session_name)
1093 DisplayServer *display_server;
1096 g_return_val_if_fail (seat != NULL, FALSE);
1098 if (!seat->priv->can_switch || !seat_get_allow_guest (seat))
1101 /* Switch to session if one open */
1102 session = find_guest_session (seat);
1105 g_debug ("Switching to existing guest account %s", session_get_username (session));
1106 seat_set_active_session (seat, session);
1110 display_server = create_display_server (seat);
1111 if (!display_server_start (display_server))
1114 session = create_guest_session (seat);
1115 if (seat->priv->session_to_activate)
1116 g_object_unref (seat->priv->session_to_activate);
1117 seat->priv->session_to_activate = g_object_ref (session);
1118 session_set_pam_service (session, AUTOLOGIN_SERVICE);
1119 session_set_display_server (session, display_server);
1125 seat_lock (Seat *seat, const gchar *username)
1127 Greeter *greeter_session;
1128 DisplayServer *display_server;
1130 g_return_val_if_fail (seat != NULL, FALSE);
1132 if (!seat->priv->can_switch)
1135 g_debug ("Locking seat");
1137 /* Switch to greeter if one open (shouldn't be though) */
1138 greeter_session = find_greeter_session (seat);
1139 if (greeter_session)
1141 g_debug ("Switching to existing greeter");
1142 seat_set_active_session (seat, SESSION (greeter_session));
1146 display_server = create_display_server (seat);
1147 if (!display_server_start (display_server))
1150 greeter_session = create_greeter_session (seat);
1151 if (seat->priv->session_to_activate)
1152 g_object_unref (seat->priv->session_to_activate);
1153 seat->priv->session_to_activate = g_object_ref (greeter_session);
1154 greeter_set_hint (greeter_session, "lock-screen", "true");
1156 greeter_set_hint (greeter_session, "select-user", username);
1157 session_set_display_server (SESSION (greeter_session), display_server);
1163 seat_stop (Seat *seat)
1165 g_return_if_fail (seat != NULL);
1167 if (seat->priv->stopping)
1170 g_debug ("Stopping seat");
1171 seat->priv->stopping = TRUE;
1172 SEAT_GET_CLASS (seat)->stop (seat);
1176 seat_get_is_stopping (Seat *seat)
1178 g_return_val_if_fail (seat != NULL, FALSE);
1179 return seat->priv->stopping;
1183 seat_real_setup (Seat *seat)
1188 seat_real_start (Seat *seat)
1190 const gchar *autologin_username;
1191 int autologin_timeout;
1192 gboolean autologin_guest;
1193 gboolean autologin_in_background;
1194 const gchar *user_session;
1195 Session *session = NULL;
1196 DisplayServer *display_server;
1198 gchar *sessions_dir;
1199 const gchar *wrapper = NULL;
1200 const gchar *session_name = NULL;
1202 g_debug ("Starting seat");
1204 display_server = create_display_server (seat);
1206 /* Get autologin settings */
1207 autologin_username = seat_get_string_property (seat, "autologin-user");
1208 if (g_strcmp0 (autologin_username, "") == 0)
1209 autologin_username = NULL;
1210 autologin_timeout = seat_get_integer_property (seat, "autologin-user-timeout");
1211 autologin_guest = seat_get_boolean_property (seat, "autologin-guest");
1212 autologin_in_background = seat_get_boolean_property (seat, "autologin-in-background");
1214 /* Autologin if configured */
1215 if (autologin_timeout == 0 || autologin_in_background)
1217 if (autologin_guest)
1219 session = create_guest_session (seat);
1220 if (seat->priv->session_to_activate)
1221 g_object_unref (seat->priv->session_to_activate);
1222 seat->priv->session_to_activate = g_object_ref (session);
1223 session_set_pam_service (session, AUTOLOGIN_SERVICE);
1225 else if (autologin_username != NULL)
1227 session = create_user_session (seat, autologin_username);
1228 if (seat->priv->session_to_activate)
1229 g_object_unref (seat->priv->session_to_activate);
1230 seat->priv->session_to_activate = g_object_ref (session);
1231 session_set_pam_service (session, AUTOLOGIN_SERVICE);
1234 /* Load in background if required */
1235 if (autologin_in_background && session)
1237 DisplayServer *background_display_server;
1239 background_display_server = create_display_server (seat);
1240 session_set_display_server (session, background_display_server);
1241 if (!display_server_start (background_display_server))
1244 /* Start a greeter as well */
1249 /* Fallback to a greeter */
1252 Greeter *greeter_session;
1254 greeter_session = create_greeter_session (seat);
1255 if (seat->priv->session_to_activate)
1256 g_object_unref (seat->priv->session_to_activate);
1257 seat->priv->session_to_activate = g_object_ref (greeter_session);
1258 session = SESSION (greeter_session);
1260 if (autologin_timeout)
1264 value = g_strdup_printf ("%d", autologin_timeout);
1265 greeter_set_hint (greeter_session, "autologin-timeout", value);
1267 if (autologin_username)
1268 greeter_set_hint (greeter_session, "autologin-user", autologin_username);
1269 if (autologin_guest)
1270 greeter_set_hint (greeter_session, "autologin-guest", "true");
1274 /* Fail if can't start a session */
1281 /* Start display server to show session on */
1282 session_set_display_server (session, display_server);
1283 if (!display_server_start (display_server))
1290 seat_real_set_active_session (Seat *seat, Session *session)
1295 seat_real_get_active_session (Seat *seat)
1301 seat_real_stop (Seat *seat)
1305 check_stopped (seat);
1306 if (seat->priv->stopped)
1309 /* Stop all the display servers and sessions on the seat. Copy the list as
1310 * it might be modified if a display server / session stops during this loop */
1311 list = g_list_copy (seat->priv->display_servers);
1312 for (link = list; link; link = link->next)
1314 DisplayServer *display_server = link->data;
1315 if (!display_server_get_is_stopping (display_server))
1317 g_debug ("Stopping display server");
1318 display_server_stop (display_server);
1322 list = g_list_copy (seat->priv->sessions);
1323 for (link = list; link; link = link->next)
1325 Session *session = link->data;
1326 if (!session_get_is_stopping (session))
1328 g_debug ("Stopping session");
1329 session_stop (session);
1336 seat_init (Seat *seat)
1338 seat->priv = G_TYPE_INSTANCE_GET_PRIVATE (seat, SEAT_TYPE, SeatPrivate);
1339 seat->priv->properties = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
1340 seat->priv->share_display_server = TRUE;
1344 seat_finalize (GObject *object)
1349 self = SEAT (object);
1351 g_hash_table_unref (self->priv->properties);
1352 for (link = self->priv->display_servers; link; link = link->next)
1354 DisplayServer *display_server = link->data;
1355 g_signal_handlers_disconnect_matched (display_server, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, self);
1357 g_list_free_full (self->priv->display_servers, g_object_unref);
1358 for (link = self->priv->sessions; link; link = link->next)
1360 Session *session = link->data;
1361 g_signal_handlers_disconnect_matched (session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, self);
1363 g_list_free_full (self->priv->sessions, g_object_unref);
1364 if (self->priv->session_to_activate)
1365 g_object_unref (self->priv->session_to_activate);
1367 G_OBJECT_CLASS (seat_parent_class)->finalize (object);
1371 seat_class_init (SeatClass *klass)
1373 GObjectClass *object_class = G_OBJECT_CLASS (klass);
1375 klass->setup = seat_real_setup;
1376 klass->start = seat_real_start;
1377 klass->set_active_session = seat_real_set_active_session;
1378 klass->get_active_session = seat_real_get_active_session;
1379 klass->run_script = seat_real_run_script;
1380 klass->stop = seat_real_stop;
1382 object_class->finalize = seat_finalize;
1384 g_type_class_add_private (klass, sizeof (SeatPrivate));
1386 signals[SESSION_ADDED] =
1387 g_signal_new ("session-added",
1388 G_TYPE_FROM_CLASS (klass),
1390 G_STRUCT_OFFSET (SeatClass, session_added),
1392 g_cclosure_marshal_VOID__OBJECT,
1393 G_TYPE_NONE, 1, SESSION_TYPE);
1394 signals[SESSION_REMOVED] =
1395 g_signal_new ("session-removed",
1396 G_TYPE_FROM_CLASS (klass),
1398 G_STRUCT_OFFSET (SeatClass, session_removed),
1400 g_cclosure_marshal_VOID__OBJECT,
1401 G_TYPE_NONE, 1, SESSION_TYPE);
1403 g_signal_new ("stopped",
1404 G_TYPE_FROM_CLASS (klass),
1406 G_STRUCT_OFFSET (SeatClass, stopped),
1408 g_cclosure_marshal_VOID__VOID,