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
18 #include <glib/gi18n.h>
24 #include "configuration.h"
25 #include "display-manager.h"
26 #include "xdmcp-server.h"
27 #include "vnc-server.h"
28 #include "seat-xdmcp-session.h"
29 #include "seat-xvnc.h"
32 #include "session-child.h"
33 #include "user-list.h"
35 static gchar *config_path = NULL;
36 static GMainLoop *loop = NULL;
37 static GTimer *log_timer;
38 static int log_fd = -1;
39 static gboolean debug = FALSE;
41 static DisplayManager *display_manager = NULL;
42 static XDMCPServer *xdmcp_server = NULL;
43 static VNCServer *vnc_server = NULL;
44 static guint bus_id = 0;
45 static GDBusConnection *bus = NULL;
46 static guint reg_id = 0;
47 static GDBusNodeInfo *seat_info;
48 static GHashTable *seat_bus_entries = NULL;
49 static guint seat_index = 0;
50 static GDBusNodeInfo *session_info;
51 static GHashTable *session_bus_entries = NULL;
52 static guint session_index = 0;
53 static gint exit_code = EXIT_SUCCESS;
59 gchar *removed_signal;
63 #define LIGHTDM_BUS_NAME "org.freedesktop.DisplayManager"
66 log_cb (const gchar *log_domain, GLogLevelFlags log_level, const gchar *message, gpointer data)
71 switch (log_level & G_LOG_LEVEL_MASK)
73 case G_LOG_LEVEL_ERROR:
76 case G_LOG_LEVEL_CRITICAL:
79 case G_LOG_LEVEL_WARNING:
82 case G_LOG_LEVEL_MESSAGE:
85 case G_LOG_LEVEL_INFO:
88 case G_LOG_LEVEL_DEBUG:
96 text = g_strdup_printf ("[%+.2fs] %s %s\n", g_timer_elapsed (log_timer, NULL), prefix, message);
98 /* Log everything to a file */
102 n_written = write (log_fd, text, strlen (text));
104 ; /* Check result so compiler doesn't warn about it */
107 /* Log to stderr if requested */
109 g_printerr ("%s", text);
111 g_log_default_handler (log_domain, log_level, message, data);
119 gchar *log_dir, *path, *old_path;
121 log_timer = g_timer_new ();
124 log_dir = config_get_string (config_get_instance (), "LightDM", "log-directory");
125 path = g_build_filename (log_dir, "lightdm.log", NULL);
128 /* Move old file out of the way */
129 old_path = g_strdup_printf ("%s.old", path);
130 rename (path, old_path);
133 /* Create new file and log to it */
134 log_fd = open (path, O_WRONLY | O_CREAT | O_TRUNC, 0600);
135 fcntl (log_fd, F_SETFD, FD_CLOEXEC);
136 g_log_set_default_handler (log_cb, NULL);
138 g_debug ("Logging to %s", path);
143 set_seat_properties (Seat *seat, const gchar *config_section)
148 keys = config_get_keys (config_get_instance (), "SeatDefaults");
149 for (i = 0; keys[i]; i++)
151 gchar *value = config_get_string (config_get_instance (), "SeatDefaults", keys[i]);
152 seat_set_property (seat, keys[i], value);
159 keys = config_get_keys (config_get_instance (), config_section);
160 for (i = 0; keys[i]; i++)
162 gchar *value = config_get_string (config_get_instance (), config_section, keys[i]);
163 seat_set_property (seat, keys[i], value);
171 signal_cb (Process *process, int signum)
173 g_debug ("Caught %s signal, shutting down", g_strsignal (signum));
174 display_manager_stop (display_manager);
175 // FIXME: Stop XDMCP server
179 display_manager_stopped_cb (DisplayManager *display_manager)
181 g_debug ("Stopping daemon");
182 g_main_loop_quit (loop);
186 display_manager_seat_removed_cb (DisplayManager *display_manager, Seat *seat)
190 Seat *next_seat = NULL;
193 /* If we have fallback types registered for the seat, let's try them
195 types = seat_get_string_list_property (seat, "type");
196 next_types = g_string_new ("");
197 for (iter = types; iter && *iter; iter++)
200 continue; // skip first one, that is our current seat type
204 next_seat = seat_new (*iter);
205 g_string_assign (next_types, *iter);
209 // Build up list of types to try next time
210 g_string_append_c (next_types, ';');
211 g_string_append (next_types, *iter);
218 const gchar *seat_name;
219 gchar *config_section = NULL;
221 seat_name = seat_get_string_property (seat, "seat-name");
223 config_section = g_strdup_printf ("Seat:%s", seat_name);
224 set_seat_properties (next_seat, config_section);
225 g_free (config_section);
227 // We set this manually on default seat. Let's port it over if needed.
228 if (seat_get_boolean_property (seat, "exit-on-failure"))
229 seat_set_property (next_seat, "exit-on-failure", "true");
231 seat_set_property (next_seat, "type", next_types->str);
233 display_manager_add_seat (display_manager, next_seat);
234 g_object_unref (next_seat);
236 else if (seat_get_boolean_property (seat, "exit-on-failure"))
238 g_debug ("Required seat has stopped");
239 exit_code = EXIT_FAILURE;
240 display_manager_stop (display_manager);
243 g_string_free (next_types, TRUE);
247 handle_display_manager_get_property (GDBusConnection *connection,
249 const gchar *object_path,
250 const gchar *interface_name,
251 const gchar *property_name,
255 GVariant *result = NULL;
257 if (g_strcmp0 (property_name, "Seats") == 0)
259 GVariantBuilder *builder;
263 builder = g_variant_builder_new (G_VARIANT_TYPE ("ao"));
264 g_hash_table_iter_init (&iter, seat_bus_entries);
265 while (g_hash_table_iter_next (&iter, NULL, &value))
267 BusEntry *entry = value;
268 g_variant_builder_add_value (builder, g_variant_new_object_path (entry->path));
270 result = g_variant_builder_end (builder);
271 g_variant_builder_unref (builder);
273 else if (g_strcmp0 (property_name, "Sessions") == 0)
275 GVariantBuilder *builder;
279 builder = g_variant_builder_new (G_VARIANT_TYPE ("ao"));
280 g_hash_table_iter_init (&iter, session_bus_entries);
281 while (g_hash_table_iter_next (&iter, NULL, &value))
283 BusEntry *entry = value;
284 g_variant_builder_add_value (builder, g_variant_new_object_path (entry->path));
286 result = g_variant_builder_end (builder);
287 g_variant_builder_unref (builder);
294 handle_display_manager_call (GDBusConnection *connection,
296 const gchar *object_path,
297 const gchar *interface_name,
298 const gchar *method_name,
299 GVariant *parameters,
300 GDBusMethodInvocation *invocation,
303 if (g_strcmp0 (method_name, "AddSeat") == 0)
306 GVariantIter *property_iter;
310 if (!g_variant_is_of_type (parameters, G_VARIANT_TYPE ("(sa(ss))")))
313 g_variant_get (parameters, "(&sa(ss))", &type, &property_iter);
315 g_debug ("Adding seat of type %s", type);
317 seat = seat_new (type);
320 set_seat_properties (seat, NULL);
321 while (g_variant_iter_loop (property_iter, "(&s&s)", &name, &value))
322 seat_set_property (seat, name, value);
324 g_variant_iter_free (property_iter);
328 // FIXME: Need to make proper error
329 g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_FAILED, "Unable to create seat of type %s", type);
333 if (display_manager_add_seat (display_manager, seat))
337 entry = g_hash_table_lookup (seat_bus_entries, seat);
338 g_dbus_method_invocation_return_value (invocation, g_variant_new ("(o)", entry->path));
340 else// FIXME: Need to make proper error
341 g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_FAILED, "Failed to start seat");
342 g_object_unref (seat);
344 else if (g_strcmp0 (method_name, "AddLocalXSeat") == 0)
349 if (!g_variant_is_of_type (parameters, G_VARIANT_TYPE ("(i)")))
352 g_variant_get (parameters, "(i)", &display_number);
354 g_debug ("Adding local X seat :%d", display_number);
356 seat = seat_new ("xremote");
359 gchar *display_number_string;
361 set_seat_properties (seat, NULL);
362 display_number_string = g_strdup_printf ("%d", display_number);
363 seat_set_property (seat, "xserver-display-number", display_number_string);
364 g_free (display_number_string);
369 // FIXME: Need to make proper error
370 g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_FAILED, "Unable to create local X seat");
374 if (display_manager_add_seat (display_manager, seat))
378 entry = g_hash_table_lookup (seat_bus_entries, seat);
379 g_dbus_method_invocation_return_value (invocation, g_variant_new ("(o)", entry->path));
381 else// FIXME: Need to make proper error
382 g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_FAILED, "Failed to start seat");
383 g_object_unref (seat);
388 handle_seat_get_property (GDBusConnection *connection,
390 const gchar *object_path,
391 const gchar *interface_name,
392 const gchar *property_name,
396 Seat *seat = user_data;
397 GVariant *result = NULL;
399 if (g_strcmp0 (property_name, "CanSwitch") == 0)
400 result = g_variant_new_boolean (seat_get_can_switch (seat));
401 if (g_strcmp0 (property_name, "HasGuestAccount") == 0)
402 result = g_variant_new_boolean (seat_get_allow_guest (seat));
403 else if (g_strcmp0 (property_name, "Sessions") == 0)
405 GVariantBuilder *builder;
408 builder = g_variant_builder_new (G_VARIANT_TYPE ("ao"));
409 for (link = seat_get_sessions (seat); link; link = link->next)
411 Session *session = link->data;
413 entry = g_hash_table_lookup (session_bus_entries, session);
415 g_variant_builder_add_value (builder, g_variant_new_object_path (entry->path));
417 result = g_variant_builder_end (builder);
418 g_variant_builder_unref (builder);
425 handle_seat_call (GDBusConnection *connection,
427 const gchar *object_path,
428 const gchar *interface_name,
429 const gchar *method_name,
430 GVariant *parameters,
431 GDBusMethodInvocation *invocation,
434 Seat *seat = user_data;
436 if (g_strcmp0 (method_name, "SwitchToGreeter") == 0)
438 if (!g_variant_is_of_type (parameters, G_VARIANT_TYPE ("()")))
441 seat_switch_to_greeter (seat);
442 g_dbus_method_invocation_return_value (invocation, NULL);
444 else if (g_strcmp0 (method_name, "SwitchToUser") == 0)
446 const gchar *username, *session_name;
448 if (!g_variant_is_of_type (parameters, G_VARIANT_TYPE ("(ss)")))
451 g_variant_get (parameters, "(&s&s)", &username, &session_name);
452 if (strcmp (session_name, "") == 0)
455 seat_switch_to_user (seat, username, session_name);
456 g_dbus_method_invocation_return_value (invocation, NULL);
458 else if (g_strcmp0 (method_name, "SwitchToGuest") == 0)
460 const gchar *session_name;
462 if (!g_variant_is_of_type (parameters, G_VARIANT_TYPE ("(s)")))
465 g_variant_get (parameters, "(&s)", &session_name);
466 if (strcmp (session_name, "") == 0)
469 seat_switch_to_guest (seat, session_name);
470 g_dbus_method_invocation_return_value (invocation, NULL);
472 else if (g_strcmp0 (method_name, "Lock") == 0)
474 /* FIXME: Should only allow locks if have a session on this seat */
475 seat_lock (seat, NULL);
476 g_dbus_method_invocation_return_value (invocation, NULL);
481 get_seat_for_session (Session *session)
485 for (seat_link = display_manager_get_seats (display_manager); seat_link; seat_link = seat_link->next)
487 Seat *seat = seat_link->data;
490 for (session_link = seat_get_sessions (seat); session_link; session_link = session_link->next)
492 Session *s = session_link->data;
503 handle_session_get_property (GDBusConnection *connection,
505 const gchar *object_path,
506 const gchar *interface_name,
507 const gchar *property_name,
511 Session *session = user_data;
514 entry = g_hash_table_lookup (session_bus_entries, session);
515 if (g_strcmp0 (property_name, "Seat") == 0)
516 return g_variant_new_object_path (entry ? entry->parent_path : "");
517 else if (g_strcmp0 (property_name, "UserName") == 0)
518 return g_variant_new_string (session_get_username (session));
524 handle_session_call (GDBusConnection *connection,
526 const gchar *object_path,
527 const gchar *interface_name,
528 const gchar *method_name,
529 GVariant *parameters,
530 GDBusMethodInvocation *invocation,
533 Session *session = user_data;
535 if (g_strcmp0 (method_name, "Lock") == 0)
539 seat = get_seat_for_session (session);
540 /* FIXME: Should only allow locks if have a session on this seat */
541 seat_lock (seat, session_get_username (session));
542 g_dbus_method_invocation_return_value (invocation, NULL);
547 bus_entry_new (const gchar *path, const gchar *parent_path, const gchar *removed_signal)
551 entry = g_malloc0 (sizeof (BusEntry));
552 entry->path = g_strdup (path);
553 entry->parent_path = g_strdup (parent_path);
554 entry->removed_signal = g_strdup (removed_signal);
560 bus_entry_free (gpointer data)
562 BusEntry *entry = data;
563 GError *error = NULL;
565 g_dbus_connection_unregister_object (bus, entry->bus_id);
567 if (!g_dbus_connection_emit_signal (bus,
569 "/org/freedesktop/DisplayManager",
570 "org.freedesktop.DisplayManager",
571 entry->removed_signal,
572 g_variant_new ("(o)", entry->path),
574 g_warning ("Failed to emit %s signal: %s", entry->removed_signal, error->message);
575 g_clear_error (&error);
577 g_free (entry->path);
578 g_free (entry->parent_path);
579 g_free (entry->removed_signal);
584 running_user_session_cb (Seat *seat, Session *session)
586 static const GDBusInterfaceVTable session_vtable =
589 handle_session_get_property
591 BusEntry *seat_entry, *entry;
593 GError *error = NULL;
595 /* Set environment variables when session runs */
596 seat_entry = g_hash_table_lookup (seat_bus_entries, seat);
597 session_set_env (session, "XDG_SEAT_PATH", seat_entry->path);
598 path = g_strdup_printf ("/org/freedesktop/DisplayManager/Session%d", session_index);
600 session_set_env (session, "XDG_SESSION_PATH", path);
601 g_object_set_data_full (G_OBJECT (session), "XDG_SESSION_PATH", path, g_free);
603 seat_entry = g_hash_table_lookup (seat_bus_entries, seat);
604 entry = bus_entry_new (g_object_get_data (G_OBJECT (session), "XDG_SESSION_PATH"), seat_entry ? seat_entry->path : NULL, "SessionRemoved");
605 g_hash_table_insert (session_bus_entries, g_object_ref (session), entry);
607 g_debug ("Registering session with bus path %s", entry->path);
609 entry->bus_id = g_dbus_connection_register_object (bus,
611 session_info->interfaces[0],
613 g_object_ref (session), g_object_unref,
615 if (entry->bus_id == 0)
616 g_warning ("Failed to register user session: %s", error->message);
617 g_clear_error (&error);
619 if (!g_dbus_connection_emit_signal (bus,
621 "/org/freedesktop/DisplayManager",
622 "org.freedesktop.DisplayManager",
624 g_variant_new ("(o)", entry->path),
626 g_warning ("Failed to emit SessionAdded signal: %s", error->message);
627 g_clear_error (&error);
631 session_removed_cb (Seat *seat, Session *session)
633 g_signal_handlers_disconnect_matched (session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, seat);
634 g_hash_table_remove (session_bus_entries, session);
638 seat_added_cb (DisplayManager *display_manager, Seat *seat)
640 static const GDBusInterfaceVTable seat_vtable =
643 handle_seat_get_property
647 GError *error = NULL;
649 path = g_strdup_printf ("/org/freedesktop/DisplayManager/Seat%d", seat_index);
652 entry = bus_entry_new (path, NULL, "SeatRemoved");
654 g_hash_table_insert (seat_bus_entries, g_object_ref (seat), entry);
656 g_debug ("Registering seat with bus path %s", entry->path);
658 entry->bus_id = g_dbus_connection_register_object (bus,
660 seat_info->interfaces[0],
662 g_object_ref (seat), g_object_unref,
664 if (entry->bus_id == 0)
665 g_warning ("Failed to register seat: %s", error->message);
666 g_clear_error (&error);
668 if (!g_dbus_connection_emit_signal (bus,
670 "/org/freedesktop/DisplayManager",
671 "org.freedesktop.DisplayManager",
673 g_variant_new ("(o)", entry->path),
675 g_warning ("Failed to emit SeatAdded signal: %s", error->message);
676 g_clear_error (&error);
678 g_signal_connect (seat, "running-user-session", G_CALLBACK (running_user_session_cb), NULL);
679 g_signal_connect (seat, "session-removed", G_CALLBACK (session_removed_cb), NULL);
683 seat_removed_cb (DisplayManager *display_manager, Seat *seat)
685 g_hash_table_remove (seat_bus_entries, seat);
689 xdmcp_session_cb (XDMCPServer *server, XDMCPSession *session)
691 SeatXDMCPSession *seat;
694 seat = seat_xdmcp_session_new (session);
695 set_seat_properties (SEAT (seat), NULL);
696 result = display_manager_add_seat (display_manager, SEAT (seat));
697 g_object_unref (seat);
703 vnc_connection_cb (VNCServer *server, GSocket *connection)
707 seat = seat_xvnc_new (connection);
708 set_seat_properties (SEAT (seat), NULL);
709 display_manager_add_seat (display_manager, SEAT (seat));
710 g_object_unref (seat);
714 bus_acquired_cb (GDBusConnection *connection,
718 const gchar *display_manager_interface =
720 " <interface name='org.freedesktop.DisplayManager'>"
721 " <property name='Seats' type='ao' access='read'/>"
722 " <property name='Sessions' type='ao' access='read'/>"
723 " <method name='AddSeat'>"
724 " <arg name='type' direction='in' type='s'/>"
725 " <arg name='properties' direction='in' type='a(ss)'/>"
726 " <arg name='seat' direction='out' type='o'/>"
728 " <method name='AddLocalXSeat'>"
729 " <arg name='display-number' direction='in' type='i'/>"
730 " <arg name='seat' direction='out' type='o'/>"
732 " <signal name='SeatAdded'>"
733 " <arg name='seat' type='o'/>"
735 " <signal name='SeatRemoved'>"
736 " <arg name='seat' type='o'/>"
738 " <signal name='SessionAdded'>"
739 " <arg name='session' type='o'/>"
741 " <signal name='SessionRemoved'>"
742 " <arg name='session' type='o'/>"
746 static const GDBusInterfaceVTable display_manager_vtable =
748 handle_display_manager_call,
749 handle_display_manager_get_property
751 const gchar *seat_interface =
753 " <interface name='org.freedesktop.DisplayManager.Seat'>"
754 " <property name='CanSwitch' type='b' access='read'/>"
755 " <property name='HasGuestAccount' type='b' access='read'/>"
756 " <property name='Sessions' type='ao' access='read'/>"
757 " <method name='SwitchToGreeter'/>"
758 " <method name='SwitchToUser'>"
759 " <arg name='username' direction='in' type='s'/>"
760 " <arg name='session-name' direction='in' type='s'/>"
762 " <method name='SwitchToGuest'>"
763 " <arg name='session-name' direction='in' type='s'/>"
765 " <method name='Lock'/>"
768 const gchar *session_interface =
770 " <interface name='org.freedesktop.DisplayManager.Session'>"
771 " <property name='Seat' type='o' access='read'/>"
772 " <property name='UserName' type='s' access='read'/>"
773 " <method name='Lock'/>"
776 GDBusNodeInfo *display_manager_info;
778 GError *error = NULL;
780 g_debug ("Acquired bus name %s", name);
784 display_manager_info = g_dbus_node_info_new_for_xml (display_manager_interface, NULL);
785 g_assert (display_manager_info != NULL);
786 seat_info = g_dbus_node_info_new_for_xml (seat_interface, NULL);
787 g_assert (seat_info != NULL);
788 session_info = g_dbus_node_info_new_for_xml (session_interface, NULL);
789 g_assert (session_info != NULL);
791 reg_id = g_dbus_connection_register_object (connection,
792 "/org/freedesktop/DisplayManager",
793 display_manager_info->interfaces[0],
794 &display_manager_vtable,
798 g_warning ("Failed to register display manager: %s", error->message);
799 g_clear_error (&error);
800 g_dbus_node_info_unref (display_manager_info);
802 seat_bus_entries = g_hash_table_new_full (g_direct_hash, g_direct_equal, g_object_unref, bus_entry_free);
803 session_bus_entries = g_hash_table_new_full (g_direct_hash, g_direct_equal, g_object_unref, bus_entry_free);
805 g_signal_connect (display_manager, "seat-added", G_CALLBACK (seat_added_cb), NULL);
806 g_signal_connect (display_manager, "seat-removed", G_CALLBACK (seat_removed_cb), NULL);
807 for (link = display_manager_get_seats (display_manager); link; link = link->next)
808 seat_added_cb (display_manager, (Seat *) link->data);
810 display_manager_start (display_manager);
812 /* Start the XDMCP server */
813 if (config_get_boolean (config_get_instance (), "XDMCPServer", "enabled"))
815 gchar *key_name, *key = NULL;
817 xdmcp_server = xdmcp_server_new ();
818 if (config_has_key (config_get_instance (), "XDMCPServer", "port"))
821 port = config_get_integer (config_get_instance (), "XDMCPServer", "port");
823 xdmcp_server_set_port (xdmcp_server, port);
825 g_signal_connect (xdmcp_server, "new-session", G_CALLBACK (xdmcp_session_cb), NULL);
827 key_name = config_get_string (config_get_instance (), "XDMCPServer", "key");
833 GError *error = NULL;
835 dir = config_get_string (config_get_instance (), "LightDM", "config-directory");
836 path = g_build_filename (dir, "keys.conf", NULL);
839 keys = g_key_file_new ();
840 result = g_key_file_load_from_file (keys, path, G_KEY_FILE_NONE, &error);
842 g_debug ("Error getting key %s", error->message);
843 g_clear_error (&error);
847 if (g_key_file_has_key (keys, "keyring", key_name, NULL))
848 key = g_key_file_get_string (keys, "keyring", key_name, NULL);
850 g_debug ("Key %s not defined", key_name);
853 g_key_file_free (keys);
856 xdmcp_server_set_key (xdmcp_server, key);
860 g_debug ("Starting XDMCP server on UDP/IP port %d", xdmcp_server_get_port (xdmcp_server));
861 xdmcp_server_start (xdmcp_server);
864 /* Start the VNC server */
865 if (config_get_boolean (config_get_instance (), "VNCServer", "enabled"))
869 path = g_find_program_in_path ("Xvnc");
872 vnc_server = vnc_server_new ();
873 if (config_has_key (config_get_instance (), "VNCServer", "port"))
876 port = config_get_integer (config_get_instance (), "VNCServer", "port");
878 vnc_server_set_port (vnc_server, port);
880 g_signal_connect (vnc_server, "new-connection", G_CALLBACK (vnc_connection_cb), NULL);
882 g_debug ("Starting VNC server on TCP/IP port %d", vnc_server_get_port (vnc_server));
883 vnc_server_start (vnc_server);
888 g_warning ("Can't start VNC server, Xvnc is not in the path");
893 name_lost_cb (GDBusConnection *connection,
898 g_printerr ("Failed to use bus name " LIGHTDM_BUS_NAME ", do you have appropriate permissions?\n");
900 g_printerr ("Failed to get D-Bus connection\n");
906 path_make_absolute (gchar *path)
908 gchar *cwd, *abs_path;
913 if (g_path_is_absolute (path))
916 cwd = g_get_current_dir ();
917 abs_path = g_build_filename (cwd, path, NULL);
924 compare_strings (gconstpointer a, gconstpointer b)
926 return strcmp (a, b);
930 load_config_directory (const gchar *path, GList **messages)
933 GList *files = NULL, *link;
934 GError *error = NULL;
936 /* Find configuration files */
937 dir = g_dir_open (path, 0, &error);
938 if (error && !g_error_matches (error, G_FILE_ERROR, G_FILE_ERROR_NOENT))
939 g_printerr ("Failed to open configuration directory %s: %s\n", path, error->message);
940 g_clear_error (&error);
944 while ((name = g_dir_read_name (dir)))
945 files = g_list_append (files, g_strdup (name));
949 /* Sort alphabetically and load onto existing configuration */
950 files = g_list_sort (files, compare_strings);
951 for (link = files; link; link = link->next)
953 gchar *filename = link->data;
956 conf_path = g_build_filename (path, filename, NULL);
957 if (g_str_has_suffix (filename, ".conf"))
959 *messages = g_list_append (*messages, g_strdup_printf ("Loading configuration from %s", conf_path));
960 config_load_from_file (config_get_instance (), conf_path, &error);
961 if (error && !g_error_matches (error, G_FILE_ERROR, G_FILE_ERROR_NOENT))
962 g_printerr ("Failed to load configuration from %s: %s\n", filename, error->message);
963 g_clear_error (&error);
966 g_debug ("Ignoring configuration file %s, it does not have .conf suffix", conf_path);
969 g_list_free_full (files, g_free);
973 main (int argc, char **argv)
976 GOptionContext *option_context;
978 gchar **groups, **i, *dir;
980 gboolean explicit_config = FALSE;
981 gboolean test_mode = FALSE;
982 gchar *pid_path = "/var/run/lightdm.pid";
983 gchar *config_dir, *config_d_dir = NULL;
984 gchar *log_dir = NULL;
985 gchar *run_dir = NULL;
986 gchar *cache_dir = NULL;
987 gchar *default_log_dir = g_strdup (LOG_DIR);
988 gchar *default_run_dir = g_strdup (RUN_DIR);
989 gchar *default_cache_dir = g_strdup (CACHE_DIR);
990 gboolean show_version = FALSE;
991 GList *link, *messages = NULL;
992 GOptionEntry options[] =
994 { "config", 'c', 0, G_OPTION_ARG_STRING, &config_path,
995 /* Help string for command line --config flag */
996 N_("Use configuration file"), "FILE" },
997 { "debug", 'd', 0, G_OPTION_ARG_NONE, &debug,
998 /* Help string for command line --debug flag */
999 N_("Print debugging messages"), NULL },
1000 { "test-mode", 0, 0, G_OPTION_ARG_NONE, &test_mode,
1001 /* Help string for command line --test-mode flag */
1002 N_("Run as unprivileged user, skipping things that require root access"), NULL },
1003 { "pid-file", 0, 0, G_OPTION_ARG_STRING, &pid_path,
1004 /* Help string for command line --pid-file flag */
1005 N_("File to write PID into"), "FILE" },
1006 { "log-dir", 0, 0, G_OPTION_ARG_STRING, &log_dir,
1007 /* Help string for command line --log-dir flag */
1008 N_("Directory to write logs to"), "DIRECTORY" },
1009 { "run-dir", 0, 0, G_OPTION_ARG_STRING, &run_dir,
1010 /* Help string for command line --run-dir flag */
1011 N_("Directory to store running state"), "DIRECTORY" },
1012 { "cache-dir", 0, 0, G_OPTION_ARG_STRING, &cache_dir,
1013 /* Help string for command line --cache-dir flag */
1014 N_("Directory to cache information"), "DIRECTORY" },
1015 { "version", 'v', 0, G_OPTION_ARG_NONE, &show_version,
1016 /* Help string for command line --version flag */
1017 N_("Show release version"), NULL },
1020 GError *error = NULL;
1022 /* When lightdm starts sessions it needs to run itself in a new mode */
1023 if (argc >= 2 && strcmp (argv[1], "--session-child") == 0)
1024 return session_child_run (argc, argv);
1026 #if !defined(GLIB_VERSION_2_36)
1029 loop = g_main_loop_new (NULL, FALSE);
1031 messages = g_list_append (messages, g_strdup_printf ("Starting Light Display Manager %s, UID=%i PID=%i", VERSION, getuid (), getpid ()));
1033 g_signal_connect (process_get_current (), "got-signal", G_CALLBACK (signal_cb), NULL);
1035 option_context = g_option_context_new (/* Arguments and description for --help test */
1036 _("- Display Manager"));
1037 g_option_context_add_main_entries (option_context, options, GETTEXT_PACKAGE);
1038 result = g_option_context_parse (option_context, &argc, &argv, &error);
1040 g_printerr ("%s\n", error->message);
1041 g_clear_error (&error);
1042 g_option_context_free (option_context);
1045 g_printerr (/* Text printed out when an unknown command-line argument provided */
1046 _("Run '%s --help' to see a full list of available command line options."), argv[0]);
1048 return EXIT_FAILURE;
1053 /* NOTE: Is not translated so can be easily parsed */
1054 g_printerr ("lightdm %s\n", VERSION);
1055 return EXIT_SUCCESS;
1060 config_dir = g_path_get_basename (config_path);
1061 config_dir = path_make_absolute (config_dir);
1062 explicit_config = TRUE;
1066 config_dir = g_strdup (CONFIG_DIR);
1067 config_d_dir = g_build_filename (config_dir, "lightdm.conf.d", NULL);
1068 config_path = g_build_filename (config_dir, "lightdm.conf", NULL);
1070 config_set_string (config_get_instance (), "LightDM", "config-directory", config_dir);
1071 g_free (config_dir);
1073 if (!test_mode && getuid () != 0)
1075 g_printerr ("Only root can run Light Display Manager. To run as a regular user for testing run with the --test-mode flag.\n");
1076 return EXIT_FAILURE;
1079 /* If running inside an X server use Xephyr for display */
1080 if (getenv ("DISPLAY") && getuid () != 0)
1082 gchar *x_server_path;
1084 x_server_path = g_find_program_in_path ("Xephyr");
1087 g_printerr ("Running inside an X server requires Xephyr to be installed but it cannot be found. Please install it or update your PATH environment variable.\n");
1088 return EXIT_FAILURE;
1090 g_free (x_server_path);
1093 /* Make sure the system binary directory (where the greeters are installed) is in the path */
1096 const gchar *path = g_getenv ("PATH");
1100 new_path = g_strdup_printf ("%s:%s", path, SBIN_DIR);
1102 new_path = g_strdup (SBIN_DIR);
1103 g_setenv ("PATH", new_path, TRUE);
1107 /* Write PID file */
1108 pid_file = fopen (pid_path, "w");
1111 fprintf (pid_file, "%d\n", getpid ());
1115 /* If not running as root write output to directories we control */
1118 g_free (default_log_dir);
1119 default_log_dir = g_build_filename (g_get_user_cache_dir (), "lightdm", "log", NULL);
1120 g_free (default_run_dir);
1121 default_run_dir = g_build_filename (g_get_user_cache_dir (), "lightdm", "run", NULL);
1122 g_free (default_cache_dir);
1123 default_cache_dir = g_build_filename (g_get_user_cache_dir (), "lightdm", "cache", NULL);
1126 /* Load config file(s) */
1127 load_config_directory (SYSTEM_CONFIG_DIR, &messages);
1129 load_config_directory (config_d_dir, &messages);
1130 g_free (config_d_dir);
1131 messages = g_list_append (messages, g_strdup_printf ("Loading configuration from %s", config_path));
1132 if (!config_load_from_file (config_get_instance (), config_path, &error))
1136 is_empty = error && g_error_matches (error, G_FILE_ERROR, G_FILE_ERROR_NOENT);
1138 if (explicit_config || !is_empty)
1141 g_printerr ("Failed to load configuration from %s: %s\n", config_path, error->message);
1142 exit (EXIT_FAILURE);
1145 g_clear_error (&error);
1146 g_free (config_path);
1148 /* Set default values */
1149 if (!config_has_key (config_get_instance (), "LightDM", "start-default-seat"))
1150 config_set_boolean (config_get_instance (), "LightDM", "start-default-seat", TRUE);
1151 if (!config_has_key (config_get_instance (), "LightDM", "minimum-vt"))
1152 config_set_integer (config_get_instance (), "LightDM", "minimum-vt", 7);
1153 if (!config_has_key (config_get_instance (), "LightDM", "guest-account-script"))
1154 config_set_string (config_get_instance (), "LightDM", "guest-account-script", "guest-account");
1155 if (!config_has_key (config_get_instance (), "LightDM", "greeter-user"))
1156 config_set_string (config_get_instance (), "LightDM", "greeter-user", GREETER_USER);
1157 if (!config_has_key (config_get_instance (), "LightDM", "lock-memory"))
1158 config_set_boolean (config_get_instance (), "LightDM", "lock-memory", TRUE);
1159 if (!config_has_key (config_get_instance (), "SeatDefaults", "type"))
1160 config_set_string (config_get_instance (), "SeatDefaults", "type", "xlocal");
1161 if (!config_has_key (config_get_instance (), "SeatDefaults", "xserver-command"))
1162 config_set_string (config_get_instance (), "SeatDefaults", "xserver-command", "X");
1163 if (!config_has_key (config_get_instance (), "SeatDefaults", "xserver-share"))
1164 config_set_boolean (config_get_instance (), "SeatDefaults", "xserver-share", TRUE);
1165 if (!config_has_key (config_get_instance (), "SeatDefaults", "unity-compositor-command"))
1166 config_set_string (config_get_instance (), "SeatDefaults", "unity-compositor-command", "unity-system-compositor");
1167 if (!config_has_key (config_get_instance (), "SeatDefaults", "start-session"))
1168 config_set_boolean (config_get_instance (), "SeatDefaults", "start-session", TRUE);
1169 if (!config_has_key (config_get_instance (), "SeatDefaults", "allow-guest"))
1170 config_set_boolean (config_get_instance (), "SeatDefaults", "allow-guest", TRUE);
1171 if (!config_has_key (config_get_instance (), "SeatDefaults", "greeter-allow-guest"))
1172 config_set_boolean (config_get_instance (), "SeatDefaults", "greeter-allow-guest", TRUE);
1173 if (!config_has_key (config_get_instance (), "SeatDefaults", "greeter-show-remote-login"))
1174 config_set_boolean (config_get_instance (), "SeatDefaults", "greeter-show-remote-login", TRUE);
1175 if (!config_has_key (config_get_instance (), "SeatDefaults", "greeter-session"))
1176 config_set_string (config_get_instance (), "SeatDefaults", "greeter-session", GREETER_SESSION);
1177 if (!config_has_key (config_get_instance (), "SeatDefaults", "user-session"))
1178 config_set_string (config_get_instance (), "SeatDefaults", "user-session", USER_SESSION);
1179 if (!config_has_key (config_get_instance (), "SeatDefaults", "session-wrapper"))
1180 config_set_string (config_get_instance (), "SeatDefaults", "session-wrapper", "lightdm-session");
1181 if (!config_has_key (config_get_instance (), "LightDM", "log-directory"))
1182 config_set_string (config_get_instance (), "LightDM", "log-directory", default_log_dir);
1183 g_free (default_log_dir);
1184 if (!config_has_key (config_get_instance (), "LightDM", "run-directory"))
1185 config_set_string (config_get_instance (), "LightDM", "run-directory", default_run_dir);
1186 g_free (default_run_dir);
1187 if (!config_has_key (config_get_instance (), "LightDM", "cache-directory"))
1188 config_set_string (config_get_instance (), "LightDM", "cache-directory", default_cache_dir);
1189 g_free (default_cache_dir);
1190 if (!config_has_key (config_get_instance (), "LightDM", "sessions-directory"))
1191 config_set_string (config_get_instance (), "LightDM", "sessions-directory", SESSIONS_DIR);
1192 if (!config_has_key (config_get_instance (), "LightDM", "remote-sessions-directory"))
1193 config_set_string (config_get_instance (), "LightDM", "remote-sessions-directory", REMOTE_SESSIONS_DIR);
1194 if (!config_has_key (config_get_instance (), "LightDM", "greeters-directory"))
1195 config_set_string (config_get_instance (), "LightDM", "greeters-directory", GREETERS_DIR);
1197 /* Override defaults */
1199 config_set_string (config_get_instance (), "LightDM", "log-directory", log_dir);
1202 config_set_string (config_get_instance (), "LightDM", "run-directory", run_dir);
1205 config_set_string (config_get_instance (), "LightDM", "cache-directory", cache_dir);
1208 /* Create run and cache directories */
1209 dir = config_get_string (config_get_instance (), "LightDM", "log-directory");
1210 if (g_mkdir_with_parents (dir, S_IRWXU | S_IXGRP | S_IXOTH) < 0)
1211 g_warning ("Failed to make log directory %s: %s", dir, strerror (errno));
1213 dir = config_get_string (config_get_instance (), "LightDM", "run-directory");
1214 if (g_mkdir_with_parents (dir, S_IRWXU | S_IXGRP | S_IXOTH) < 0)
1215 g_warning ("Failed to make run directory %s: %s", dir, strerror (errno));
1217 dir = config_get_string (config_get_instance (), "LightDM", "cache-directory");
1218 if (g_mkdir_with_parents (dir, S_IRWXU | S_IXGRP | S_IXOTH) < 0)
1219 g_warning ("Failed to make cache directory %s: %s", dir, strerror (errno));
1224 /* Show queued messages once logging is complete */
1225 for (link = messages; link; link = link->next)
1226 g_debug ("%s", (gchar *)link->data);
1227 g_list_free_full (messages, g_free);
1229 g_debug ("Using D-Bus name %s", LIGHTDM_BUS_NAME);
1230 bus_id = g_bus_own_name (getuid () == 0 ? G_BUS_TYPE_SYSTEM : G_BUS_TYPE_SESSION,
1232 G_BUS_NAME_OWNER_FLAGS_NONE,
1240 g_debug ("Running in user mode");
1241 if (getenv ("DISPLAY"))
1242 g_debug ("Using Xephyr for X servers");
1244 display_manager = display_manager_new ();
1245 g_signal_connect (display_manager, "stopped", G_CALLBACK (display_manager_stopped_cb), NULL);
1246 g_signal_connect (display_manager, "seat-removed", G_CALLBACK (display_manager_seat_removed_cb), NULL);
1248 /* Load the static display entries */
1249 groups = config_get_groups (config_get_instance ());
1250 for (i = groups; *i; i++)
1252 gchar *config_section = *i;
1256 const gchar *const seatpfx = "Seat:";
1258 if (!g_str_has_prefix (config_section, seatpfx))
1261 g_debug ("Loading seat %s", config_section);
1262 types = config_get_string_list (config_get_instance (), config_section, "type");
1264 types = config_get_string_list (config_get_instance (), "SeatDefaults", "type");
1265 for (type = types; type && *type; type++)
1267 seat = seat_new (*type);
1274 const gsize seatpfxlen = strlen(seatpfx);
1275 gchar *seatname = config_section + seatpfxlen;
1277 seat_set_property (seat, "seat-name", seatname);
1279 set_seat_properties (seat, config_section);
1280 display_manager_add_seat (display_manager, seat);
1281 g_object_unref (seat);
1285 g_warning ("Failed to create seat %s", config_section);
1287 g_strfreev (groups);
1289 /* If no seats start a default one */
1290 if (n_seats == 0 && config_get_boolean (config_get_instance (), "LightDM", "start-default-seat"))
1296 g_debug ("Adding default seat");
1298 types = config_get_string_list (config_get_instance (), "SeatDefaults", "type");
1299 for (type = types; type && *type; type++)
1301 seat = seat_new (*type);
1308 set_seat_properties (seat, NULL);
1309 seat_set_property (seat, "exit-on-failure", "true");
1310 if (!display_manager_add_seat (display_manager, seat))
1311 return EXIT_FAILURE;
1312 g_object_unref (seat);
1316 g_warning ("Failed to create default seat");
1317 return EXIT_FAILURE;
1321 g_main_loop_run (loop);
1323 /* Clean up user list */
1324 common_user_list_cleanup ();
1326 /* Clean up display manager */
1327 g_object_unref (display_manager);
1328 display_manager = NULL;
1330 /* Remove D-Bus interface */
1331 g_dbus_connection_unregister_object (bus, reg_id);
1332 g_bus_unown_name (bus_id);
1333 if (seat_bus_entries)
1334 g_hash_table_unref (seat_bus_entries);
1335 if (session_bus_entries)
1336 g_hash_table_unref (session_bus_entries);
1338 g_debug ("Exiting with return value %d", exit_code);