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 "shared-data-manager.h"
34 #include "user-list.h"
36 static gchar *config_path = NULL;
37 static GMainLoop *loop = NULL;
38 static GTimer *log_timer;
39 static int log_fd = -1;
40 static gboolean debug = FALSE;
42 static DisplayManager *display_manager = NULL;
43 static XDMCPServer *xdmcp_server = NULL;
44 static VNCServer *vnc_server = NULL;
45 static guint bus_id = 0;
46 static GDBusConnection *bus = NULL;
47 static guint reg_id = 0;
48 static GDBusNodeInfo *seat_info;
49 static GHashTable *seat_bus_entries = NULL;
50 static guint seat_index = 0;
51 static GDBusNodeInfo *session_info;
52 static GHashTable *session_bus_entries = NULL;
53 static guint session_index = 0;
54 static gint exit_code = EXIT_SUCCESS;
60 gchar *removed_signal;
64 #define LIGHTDM_BUS_NAME "org.freedesktop.DisplayManager"
67 log_cb (const gchar *log_domain, GLogLevelFlags log_level, const gchar *message, gpointer data)
72 switch (log_level & G_LOG_LEVEL_MASK)
74 case G_LOG_LEVEL_ERROR:
77 case G_LOG_LEVEL_CRITICAL:
80 case G_LOG_LEVEL_WARNING:
83 case G_LOG_LEVEL_MESSAGE:
86 case G_LOG_LEVEL_INFO:
89 case G_LOG_LEVEL_DEBUG:
97 text = g_strdup_printf ("[%+.2fs] %s %s\n", g_timer_elapsed (log_timer, NULL), prefix, message);
99 /* Log everything to a file */
103 n_written = write (log_fd, text, strlen (text));
105 ; /* Check result so compiler doesn't warn about it */
108 /* Log to stderr if requested */
110 g_printerr ("%s", text);
112 g_log_default_handler (log_domain, log_level, message, data);
120 gchar *log_dir, *path, *old_path;
122 log_timer = g_timer_new ();
125 log_dir = config_get_string (config_get_instance (), "LightDM", "log-directory");
126 path = g_build_filename (log_dir, "lightdm.log", NULL);
129 /* Move old file out of the way */
130 old_path = g_strdup_printf ("%s.old", path);
131 rename (path, old_path);
134 /* Create new file and log to it */
135 log_fd = open (path, O_WRONLY | O_CREAT | O_TRUNC, 0600);
136 fcntl (log_fd, F_SETFD, FD_CLOEXEC);
137 g_log_set_default_handler (log_cb, NULL);
139 g_debug ("Logging to %s", path);
144 set_seat_properties (Seat *seat, const gchar *config_section)
149 keys = config_get_keys (config_get_instance (), "SeatDefaults");
150 for (i = 0; keys[i]; i++)
152 gchar *value = config_get_string (config_get_instance (), "SeatDefaults", keys[i]);
153 seat_set_property (seat, keys[i], value);
160 keys = config_get_keys (config_get_instance (), config_section);
161 for (i = 0; keys[i]; i++)
163 gchar *value = config_get_string (config_get_instance (), config_section, keys[i]);
164 seat_set_property (seat, keys[i], value);
172 signal_cb (Process *process, int signum)
174 g_debug ("Caught %s signal, shutting down", g_strsignal (signum));
175 display_manager_stop (display_manager);
176 // FIXME: Stop XDMCP server
180 display_manager_stopped_cb (DisplayManager *display_manager)
182 g_debug ("Stopping daemon");
183 g_main_loop_quit (loop);
187 display_manager_seat_removed_cb (DisplayManager *display_manager, Seat *seat)
191 Seat *next_seat = NULL;
194 /* If we have fallback types registered for the seat, let's try them
196 types = seat_get_string_list_property (seat, "type");
197 next_types = g_string_new ("");
198 for (iter = types; iter && *iter; iter++)
201 continue; // skip first one, that is our current seat type
205 next_seat = seat_new (*iter);
206 g_string_assign (next_types, *iter);
210 // Build up list of types to try next time
211 g_string_append_c (next_types, ';');
212 g_string_append (next_types, *iter);
219 const gchar *seat_name;
220 gchar *config_section = NULL;
222 seat_name = seat_get_string_property (seat, "seat-name");
224 config_section = g_strdup_printf ("Seat:%s", seat_name);
225 set_seat_properties (next_seat, config_section);
226 g_free (config_section);
228 // We set this manually on default seat. Let's port it over if needed.
229 if (seat_get_boolean_property (seat, "exit-on-failure"))
230 seat_set_property (next_seat, "exit-on-failure", "true");
232 seat_set_property (next_seat, "type", next_types->str);
234 display_manager_add_seat (display_manager, next_seat);
235 g_object_unref (next_seat);
237 else if (seat_get_boolean_property (seat, "exit-on-failure"))
239 g_debug ("Required seat has stopped");
240 exit_code = EXIT_FAILURE;
241 display_manager_stop (display_manager);
244 g_string_free (next_types, TRUE);
248 handle_display_manager_get_property (GDBusConnection *connection,
250 const gchar *object_path,
251 const gchar *interface_name,
252 const gchar *property_name,
256 GVariant *result = NULL;
258 if (g_strcmp0 (property_name, "Seats") == 0)
260 GVariantBuilder *builder;
264 builder = g_variant_builder_new (G_VARIANT_TYPE ("ao"));
265 g_hash_table_iter_init (&iter, seat_bus_entries);
266 while (g_hash_table_iter_next (&iter, NULL, &value))
268 BusEntry *entry = value;
269 g_variant_builder_add_value (builder, g_variant_new_object_path (entry->path));
271 result = g_variant_builder_end (builder);
272 g_variant_builder_unref (builder);
274 else if (g_strcmp0 (property_name, "Sessions") == 0)
276 GVariantBuilder *builder;
280 builder = g_variant_builder_new (G_VARIANT_TYPE ("ao"));
281 g_hash_table_iter_init (&iter, session_bus_entries);
282 while (g_hash_table_iter_next (&iter, NULL, &value))
284 BusEntry *entry = value;
285 g_variant_builder_add_value (builder, g_variant_new_object_path (entry->path));
287 result = g_variant_builder_end (builder);
288 g_variant_builder_unref (builder);
295 handle_display_manager_call (GDBusConnection *connection,
297 const gchar *object_path,
298 const gchar *interface_name,
299 const gchar *method_name,
300 GVariant *parameters,
301 GDBusMethodInvocation *invocation,
304 if (g_strcmp0 (method_name, "AddSeat") == 0)
307 GVariantIter *property_iter;
311 if (!g_variant_is_of_type (parameters, G_VARIANT_TYPE ("(sa(ss))")))
314 g_variant_get (parameters, "(&sa(ss))", &type, &property_iter);
316 g_debug ("Adding seat of type %s", type);
318 seat = seat_new (type);
321 set_seat_properties (seat, NULL);
322 while (g_variant_iter_loop (property_iter, "(&s&s)", &name, &value))
323 seat_set_property (seat, name, value);
325 g_variant_iter_free (property_iter);
329 // FIXME: Need to make proper error
330 g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_FAILED, "Unable to create seat of type %s", type);
334 if (display_manager_add_seat (display_manager, seat))
338 entry = g_hash_table_lookup (seat_bus_entries, seat);
339 g_dbus_method_invocation_return_value (invocation, g_variant_new ("(o)", entry->path));
341 else// FIXME: Need to make proper error
342 g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_FAILED, "Failed to start seat");
343 g_object_unref (seat);
345 else if (g_strcmp0 (method_name, "AddLocalXSeat") == 0)
350 if (!g_variant_is_of_type (parameters, G_VARIANT_TYPE ("(i)")))
353 g_variant_get (parameters, "(i)", &display_number);
355 g_debug ("Adding local X seat :%d", display_number);
357 seat = seat_new ("xremote");
360 gchar *display_number_string;
362 set_seat_properties (seat, NULL);
363 display_number_string = g_strdup_printf ("%d", display_number);
364 seat_set_property (seat, "xserver-display-number", display_number_string);
365 g_free (display_number_string);
370 // FIXME: Need to make proper error
371 g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_FAILED, "Unable to create local X seat");
375 if (display_manager_add_seat (display_manager, seat))
379 entry = g_hash_table_lookup (seat_bus_entries, seat);
380 g_dbus_method_invocation_return_value (invocation, g_variant_new ("(o)", entry->path));
382 else// FIXME: Need to make proper error
383 g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_FAILED, "Failed to start seat");
384 g_object_unref (seat);
389 handle_seat_get_property (GDBusConnection *connection,
391 const gchar *object_path,
392 const gchar *interface_name,
393 const gchar *property_name,
397 Seat *seat = user_data;
398 GVariant *result = NULL;
400 if (g_strcmp0 (property_name, "CanSwitch") == 0)
401 result = g_variant_new_boolean (seat_get_can_switch (seat));
402 if (g_strcmp0 (property_name, "HasGuestAccount") == 0)
403 result = g_variant_new_boolean (seat_get_allow_guest (seat));
404 else if (g_strcmp0 (property_name, "Sessions") == 0)
406 GVariantBuilder *builder;
409 builder = g_variant_builder_new (G_VARIANT_TYPE ("ao"));
410 for (link = seat_get_sessions (seat); link; link = link->next)
412 Session *session = link->data;
414 entry = g_hash_table_lookup (session_bus_entries, session);
416 g_variant_builder_add_value (builder, g_variant_new_object_path (entry->path));
418 result = g_variant_builder_end (builder);
419 g_variant_builder_unref (builder);
426 handle_seat_call (GDBusConnection *connection,
428 const gchar *object_path,
429 const gchar *interface_name,
430 const gchar *method_name,
431 GVariant *parameters,
432 GDBusMethodInvocation *invocation,
435 Seat *seat = user_data;
437 if (g_strcmp0 (method_name, "SwitchToGreeter") == 0)
439 if (!g_variant_is_of_type (parameters, G_VARIANT_TYPE ("()")))
442 seat_switch_to_greeter (seat);
443 g_dbus_method_invocation_return_value (invocation, NULL);
445 else if (g_strcmp0 (method_name, "SwitchToUser") == 0)
447 const gchar *username, *session_name;
449 if (!g_variant_is_of_type (parameters, G_VARIANT_TYPE ("(ss)")))
452 g_variant_get (parameters, "(&s&s)", &username, &session_name);
453 if (strcmp (session_name, "") == 0)
456 seat_switch_to_user (seat, username, session_name);
457 g_dbus_method_invocation_return_value (invocation, NULL);
459 else if (g_strcmp0 (method_name, "SwitchToGuest") == 0)
461 const gchar *session_name;
463 if (!g_variant_is_of_type (parameters, G_VARIANT_TYPE ("(s)")))
466 g_variant_get (parameters, "(&s)", &session_name);
467 if (strcmp (session_name, "") == 0)
470 seat_switch_to_guest (seat, session_name);
471 g_dbus_method_invocation_return_value (invocation, NULL);
473 else if (g_strcmp0 (method_name, "Lock") == 0)
475 /* FIXME: Should only allow locks if have a session on this seat */
476 seat_lock (seat, NULL);
477 g_dbus_method_invocation_return_value (invocation, NULL);
482 get_seat_for_session (Session *session)
486 for (seat_link = display_manager_get_seats (display_manager); seat_link; seat_link = seat_link->next)
488 Seat *seat = seat_link->data;
491 for (session_link = seat_get_sessions (seat); session_link; session_link = session_link->next)
493 Session *s = session_link->data;
504 handle_session_get_property (GDBusConnection *connection,
506 const gchar *object_path,
507 const gchar *interface_name,
508 const gchar *property_name,
512 Session *session = user_data;
515 entry = g_hash_table_lookup (session_bus_entries, session);
516 if (g_strcmp0 (property_name, "Seat") == 0)
517 return g_variant_new_object_path (entry ? entry->parent_path : "");
518 else if (g_strcmp0 (property_name, "UserName") == 0)
519 return g_variant_new_string (session_get_username (session));
525 handle_session_call (GDBusConnection *connection,
527 const gchar *object_path,
528 const gchar *interface_name,
529 const gchar *method_name,
530 GVariant *parameters,
531 GDBusMethodInvocation *invocation,
534 Session *session = user_data;
536 if (g_strcmp0 (method_name, "Lock") == 0)
540 seat = get_seat_for_session (session);
541 /* FIXME: Should only allow locks if have a session on this seat */
542 seat_lock (seat, session_get_username (session));
543 g_dbus_method_invocation_return_value (invocation, NULL);
548 bus_entry_new (const gchar *path, const gchar *parent_path, const gchar *removed_signal)
552 entry = g_malloc0 (sizeof (BusEntry));
553 entry->path = g_strdup (path);
554 entry->parent_path = g_strdup (parent_path);
555 entry->removed_signal = g_strdup (removed_signal);
561 bus_entry_free (gpointer data)
563 BusEntry *entry = data;
564 GError *error = NULL;
566 g_dbus_connection_unregister_object (bus, entry->bus_id);
568 if (!g_dbus_connection_emit_signal (bus,
570 "/org/freedesktop/DisplayManager",
571 "org.freedesktop.DisplayManager",
572 entry->removed_signal,
573 g_variant_new ("(o)", entry->path),
575 g_warning ("Failed to emit %s signal: %s", entry->removed_signal, error->message);
576 g_clear_error (&error);
578 g_free (entry->path);
579 g_free (entry->parent_path);
580 g_free (entry->removed_signal);
585 running_user_session_cb (Seat *seat, Session *session)
587 static const GDBusInterfaceVTable session_vtable =
590 handle_session_get_property
592 BusEntry *seat_entry, *entry;
594 GError *error = NULL;
596 /* Set environment variables when session runs */
597 seat_entry = g_hash_table_lookup (seat_bus_entries, seat);
598 session_set_env (session, "XDG_SEAT_PATH", seat_entry->path);
599 path = g_strdup_printf ("/org/freedesktop/DisplayManager/Session%d", session_index);
601 session_set_env (session, "XDG_SESSION_PATH", path);
602 g_object_set_data_full (G_OBJECT (session), "XDG_SESSION_PATH", path, g_free);
604 seat_entry = g_hash_table_lookup (seat_bus_entries, seat);
605 entry = bus_entry_new (g_object_get_data (G_OBJECT (session), "XDG_SESSION_PATH"), seat_entry ? seat_entry->path : NULL, "SessionRemoved");
606 g_hash_table_insert (session_bus_entries, g_object_ref (session), entry);
608 g_debug ("Registering session with bus path %s", entry->path);
610 entry->bus_id = g_dbus_connection_register_object (bus,
612 session_info->interfaces[0],
614 g_object_ref (session), g_object_unref,
616 if (entry->bus_id == 0)
617 g_warning ("Failed to register user session: %s", error->message);
618 g_clear_error (&error);
620 if (!g_dbus_connection_emit_signal (bus,
622 "/org/freedesktop/DisplayManager",
623 "org.freedesktop.DisplayManager",
625 g_variant_new ("(o)", entry->path),
627 g_warning ("Failed to emit SessionAdded signal: %s", error->message);
628 g_clear_error (&error);
632 session_removed_cb (Seat *seat, Session *session)
634 g_signal_handlers_disconnect_matched (session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, seat);
635 g_hash_table_remove (session_bus_entries, session);
639 seat_added_cb (DisplayManager *display_manager, Seat *seat)
641 static const GDBusInterfaceVTable seat_vtable =
644 handle_seat_get_property
648 GError *error = NULL;
650 path = g_strdup_printf ("/org/freedesktop/DisplayManager/Seat%d", seat_index);
653 entry = bus_entry_new (path, NULL, "SeatRemoved");
655 g_hash_table_insert (seat_bus_entries, g_object_ref (seat), entry);
657 g_debug ("Registering seat with bus path %s", entry->path);
659 entry->bus_id = g_dbus_connection_register_object (bus,
661 seat_info->interfaces[0],
663 g_object_ref (seat), g_object_unref,
665 if (entry->bus_id == 0)
666 g_warning ("Failed to register seat: %s", error->message);
667 g_clear_error (&error);
669 if (!g_dbus_connection_emit_signal (bus,
671 "/org/freedesktop/DisplayManager",
672 "org.freedesktop.DisplayManager",
674 g_variant_new ("(o)", entry->path),
676 g_warning ("Failed to emit SeatAdded signal: %s", error->message);
677 g_clear_error (&error);
679 g_signal_connect (seat, "running-user-session", G_CALLBACK (running_user_session_cb), NULL);
680 g_signal_connect (seat, "session-removed", G_CALLBACK (session_removed_cb), NULL);
684 seat_removed_cb (DisplayManager *display_manager, Seat *seat)
686 g_hash_table_remove (seat_bus_entries, seat);
690 xdmcp_session_cb (XDMCPServer *server, XDMCPSession *session)
692 SeatXDMCPSession *seat;
695 seat = seat_xdmcp_session_new (session);
696 set_seat_properties (SEAT (seat), NULL);
697 result = display_manager_add_seat (display_manager, SEAT (seat));
698 g_object_unref (seat);
704 vnc_connection_cb (VNCServer *server, GSocket *connection)
708 seat = seat_xvnc_new (connection);
709 set_seat_properties (SEAT (seat), NULL);
710 display_manager_add_seat (display_manager, SEAT (seat));
711 g_object_unref (seat);
715 bus_acquired_cb (GDBusConnection *connection,
719 const gchar *display_manager_interface =
721 " <interface name='org.freedesktop.DisplayManager'>"
722 " <property name='Seats' type='ao' access='read'/>"
723 " <property name='Sessions' type='ao' access='read'/>"
724 " <method name='AddSeat'>"
725 " <arg name='type' direction='in' type='s'/>"
726 " <arg name='properties' direction='in' type='a(ss)'/>"
727 " <arg name='seat' direction='out' type='o'/>"
729 " <method name='AddLocalXSeat'>"
730 " <arg name='display-number' direction='in' type='i'/>"
731 " <arg name='seat' direction='out' type='o'/>"
733 " <signal name='SeatAdded'>"
734 " <arg name='seat' type='o'/>"
736 " <signal name='SeatRemoved'>"
737 " <arg name='seat' type='o'/>"
739 " <signal name='SessionAdded'>"
740 " <arg name='session' type='o'/>"
742 " <signal name='SessionRemoved'>"
743 " <arg name='session' type='o'/>"
747 static const GDBusInterfaceVTable display_manager_vtable =
749 handle_display_manager_call,
750 handle_display_manager_get_property
752 const gchar *seat_interface =
754 " <interface name='org.freedesktop.DisplayManager.Seat'>"
755 " <property name='CanSwitch' type='b' access='read'/>"
756 " <property name='HasGuestAccount' type='b' access='read'/>"
757 " <property name='Sessions' type='ao' access='read'/>"
758 " <method name='SwitchToGreeter'/>"
759 " <method name='SwitchToUser'>"
760 " <arg name='username' direction='in' type='s'/>"
761 " <arg name='session-name' direction='in' type='s'/>"
763 " <method name='SwitchToGuest'>"
764 " <arg name='session-name' direction='in' type='s'/>"
766 " <method name='Lock'/>"
769 const gchar *session_interface =
771 " <interface name='org.freedesktop.DisplayManager.Session'>"
772 " <property name='Seat' type='o' access='read'/>"
773 " <property name='UserName' type='s' access='read'/>"
774 " <method name='Lock'/>"
777 GDBusNodeInfo *display_manager_info;
779 GError *error = NULL;
781 g_debug ("Acquired bus name %s", name);
785 display_manager_info = g_dbus_node_info_new_for_xml (display_manager_interface, NULL);
786 g_assert (display_manager_info != NULL);
787 seat_info = g_dbus_node_info_new_for_xml (seat_interface, NULL);
788 g_assert (seat_info != NULL);
789 session_info = g_dbus_node_info_new_for_xml (session_interface, NULL);
790 g_assert (session_info != NULL);
792 reg_id = g_dbus_connection_register_object (connection,
793 "/org/freedesktop/DisplayManager",
794 display_manager_info->interfaces[0],
795 &display_manager_vtable,
799 g_warning ("Failed to register display manager: %s", error->message);
800 g_clear_error (&error);
801 g_dbus_node_info_unref (display_manager_info);
803 seat_bus_entries = g_hash_table_new_full (g_direct_hash, g_direct_equal, g_object_unref, bus_entry_free);
804 session_bus_entries = g_hash_table_new_full (g_direct_hash, g_direct_equal, g_object_unref, bus_entry_free);
806 g_signal_connect (display_manager, "seat-added", G_CALLBACK (seat_added_cb), NULL);
807 g_signal_connect (display_manager, "seat-removed", G_CALLBACK (seat_removed_cb), NULL);
808 for (link = display_manager_get_seats (display_manager); link; link = link->next)
809 seat_added_cb (display_manager, (Seat *) link->data);
811 display_manager_start (display_manager);
813 /* Start the XDMCP server */
814 if (config_get_boolean (config_get_instance (), "XDMCPServer", "enabled"))
816 gchar *key_name, *key = NULL;
818 xdmcp_server = xdmcp_server_new ();
819 if (config_has_key (config_get_instance (), "XDMCPServer", "port"))
822 port = config_get_integer (config_get_instance (), "XDMCPServer", "port");
824 xdmcp_server_set_port (xdmcp_server, port);
826 g_signal_connect (xdmcp_server, "new-session", G_CALLBACK (xdmcp_session_cb), NULL);
828 key_name = config_get_string (config_get_instance (), "XDMCPServer", "key");
834 GError *error = NULL;
836 dir = config_get_string (config_get_instance (), "LightDM", "config-directory");
837 path = g_build_filename (dir, "keys.conf", NULL);
840 keys = g_key_file_new ();
841 result = g_key_file_load_from_file (keys, path, G_KEY_FILE_NONE, &error);
843 g_debug ("Error getting key %s", error->message);
844 g_clear_error (&error);
848 if (g_key_file_has_key (keys, "keyring", key_name, NULL))
849 key = g_key_file_get_string (keys, "keyring", key_name, NULL);
851 g_debug ("Key %s not defined", key_name);
854 g_key_file_free (keys);
857 xdmcp_server_set_key (xdmcp_server, key);
861 g_debug ("Starting XDMCP server on UDP/IP port %d", xdmcp_server_get_port (xdmcp_server));
862 xdmcp_server_start (xdmcp_server);
865 /* Start the VNC server */
866 if (config_get_boolean (config_get_instance (), "VNCServer", "enabled"))
870 path = g_find_program_in_path ("Xvnc");
873 vnc_server = vnc_server_new ();
874 if (config_has_key (config_get_instance (), "VNCServer", "port"))
877 port = config_get_integer (config_get_instance (), "VNCServer", "port");
879 vnc_server_set_port (vnc_server, port);
881 g_signal_connect (vnc_server, "new-connection", G_CALLBACK (vnc_connection_cb), NULL);
883 g_debug ("Starting VNC server on TCP/IP port %d", vnc_server_get_port (vnc_server));
884 vnc_server_start (vnc_server);
889 g_warning ("Can't start VNC server, Xvnc is not in the path");
894 name_lost_cb (GDBusConnection *connection,
899 g_printerr ("Failed to use bus name " LIGHTDM_BUS_NAME ", do you have appropriate permissions?\n");
901 g_printerr ("Failed to get D-Bus connection\n");
907 path_make_absolute (gchar *path)
909 gchar *cwd, *abs_path;
914 if (g_path_is_absolute (path))
917 cwd = g_get_current_dir ();
918 abs_path = g_build_filename (cwd, path, NULL);
925 compare_strings (gconstpointer a, gconstpointer b)
927 return strcmp (a, b);
931 load_config_directory (const gchar *path, GList **messages)
934 GList *files = NULL, *link;
935 GError *error = NULL;
937 /* Find configuration files */
938 dir = g_dir_open (path, 0, &error);
939 if (error && !g_error_matches (error, G_FILE_ERROR, G_FILE_ERROR_NOENT))
940 g_printerr ("Failed to open configuration directory %s: %s\n", path, error->message);
941 g_clear_error (&error);
945 while ((name = g_dir_read_name (dir)))
946 files = g_list_append (files, g_strdup (name));
950 /* Sort alphabetically and load onto existing configuration */
951 files = g_list_sort (files, compare_strings);
952 for (link = files; link; link = link->next)
954 gchar *filename = link->data;
957 conf_path = g_build_filename (path, filename, NULL);
958 if (g_str_has_suffix (filename, ".conf"))
960 *messages = g_list_append (*messages, g_strdup_printf ("Loading configuration from %s", conf_path));
961 config_load_from_file (config_get_instance (), conf_path, &error);
962 if (error && !g_error_matches (error, G_FILE_ERROR, G_FILE_ERROR_NOENT))
963 g_printerr ("Failed to load configuration from %s: %s\n", filename, error->message);
964 g_clear_error (&error);
967 g_debug ("Ignoring configuration file %s, it does not have .conf suffix", conf_path);
970 g_list_free_full (files, g_free);
974 main (int argc, char **argv)
977 GOptionContext *option_context;
979 gchar **groups, **i, *dir;
981 gboolean explicit_config = FALSE;
982 gboolean test_mode = FALSE;
983 gchar *pid_path = "/var/run/lightdm.pid";
984 gchar *config_dir, *config_d_dir = NULL;
985 gchar *log_dir = NULL;
986 gchar *run_dir = NULL;
987 gchar *cache_dir = NULL;
988 gchar *default_log_dir = g_strdup (LOG_DIR);
989 gchar *default_run_dir = g_strdup (RUN_DIR);
990 gchar *default_cache_dir = g_strdup (CACHE_DIR);
991 gboolean show_version = FALSE;
992 GList *link, *messages = NULL;
993 SharedDataManager *shared_data_manager = NULL;
994 GOptionEntry options[] =
996 { "config", 'c', 0, G_OPTION_ARG_STRING, &config_path,
997 /* Help string for command line --config flag */
998 N_("Use configuration file"), "FILE" },
999 { "debug", 'd', 0, G_OPTION_ARG_NONE, &debug,
1000 /* Help string for command line --debug flag */
1001 N_("Print debugging messages"), NULL },
1002 { "test-mode", 0, 0, G_OPTION_ARG_NONE, &test_mode,
1003 /* Help string for command line --test-mode flag */
1004 N_("Run as unprivileged user, skipping things that require root access"), NULL },
1005 { "pid-file", 0, 0, G_OPTION_ARG_STRING, &pid_path,
1006 /* Help string for command line --pid-file flag */
1007 N_("File to write PID into"), "FILE" },
1008 { "log-dir", 0, 0, G_OPTION_ARG_STRING, &log_dir,
1009 /* Help string for command line --log-dir flag */
1010 N_("Directory to write logs to"), "DIRECTORY" },
1011 { "run-dir", 0, 0, G_OPTION_ARG_STRING, &run_dir,
1012 /* Help string for command line --run-dir flag */
1013 N_("Directory to store running state"), "DIRECTORY" },
1014 { "cache-dir", 0, 0, G_OPTION_ARG_STRING, &cache_dir,
1015 /* Help string for command line --cache-dir flag */
1016 N_("Directory to cache information"), "DIRECTORY" },
1017 { "version", 'v', 0, G_OPTION_ARG_NONE, &show_version,
1018 /* Help string for command line --version flag */
1019 N_("Show release version"), NULL },
1022 GError *error = NULL;
1024 /* When lightdm starts sessions it needs to run itself in a new mode */
1025 if (argc >= 2 && strcmp (argv[1], "--session-child") == 0)
1026 return session_child_run (argc, argv);
1028 #if !defined(GLIB_VERSION_2_36)
1031 loop = g_main_loop_new (NULL, FALSE);
1033 messages = g_list_append (messages, g_strdup_printf ("Starting Light Display Manager %s, UID=%i PID=%i", VERSION, getuid (), getpid ()));
1035 g_signal_connect (process_get_current (), "got-signal", G_CALLBACK (signal_cb), NULL);
1037 option_context = g_option_context_new (/* Arguments and description for --help test */
1038 _("- Display Manager"));
1039 g_option_context_add_main_entries (option_context, options, GETTEXT_PACKAGE);
1040 result = g_option_context_parse (option_context, &argc, &argv, &error);
1042 g_printerr ("%s\n", error->message);
1043 g_clear_error (&error);
1044 g_option_context_free (option_context);
1047 g_printerr (/* Text printed out when an unknown command-line argument provided */
1048 _("Run '%s --help' to see a full list of available command line options."), argv[0]);
1050 return EXIT_FAILURE;
1055 /* NOTE: Is not translated so can be easily parsed */
1056 g_printerr ("lightdm %s\n", VERSION);
1057 return EXIT_SUCCESS;
1062 config_dir = g_path_get_basename (config_path);
1063 config_dir = path_make_absolute (config_dir);
1064 explicit_config = TRUE;
1068 config_dir = g_strdup (CONFIG_DIR);
1069 config_d_dir = g_build_filename (config_dir, "lightdm.conf.d", NULL);
1070 config_path = g_build_filename (config_dir, "lightdm.conf", NULL);
1072 config_set_string (config_get_instance (), "LightDM", "config-directory", config_dir);
1073 g_free (config_dir);
1075 if (!test_mode && getuid () != 0)
1077 g_printerr ("Only root can run Light Display Manager. To run as a regular user for testing run with the --test-mode flag.\n");
1078 return EXIT_FAILURE;
1081 /* If running inside an X server use Xephyr for display */
1082 if (getenv ("DISPLAY") && getuid () != 0)
1084 gchar *x_server_path;
1086 x_server_path = g_find_program_in_path ("Xephyr");
1089 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");
1090 return EXIT_FAILURE;
1092 g_free (x_server_path);
1095 /* Make sure the system binary directory (where the greeters are installed) is in the path */
1098 const gchar *path = g_getenv ("PATH");
1102 new_path = g_strdup_printf ("%s:%s", path, SBIN_DIR);
1104 new_path = g_strdup (SBIN_DIR);
1105 g_setenv ("PATH", new_path, TRUE);
1109 /* Write PID file */
1110 pid_file = fopen (pid_path, "w");
1113 fprintf (pid_file, "%d\n", getpid ());
1117 /* If not running as root write output to directories we control */
1120 g_free (default_log_dir);
1121 default_log_dir = g_build_filename (g_get_user_cache_dir (), "lightdm", "log", NULL);
1122 g_free (default_run_dir);
1123 default_run_dir = g_build_filename (g_get_user_cache_dir (), "lightdm", "run", NULL);
1124 g_free (default_cache_dir);
1125 default_cache_dir = g_build_filename (g_get_user_cache_dir (), "lightdm", "cache", NULL);
1128 /* Load config file(s) */
1129 load_config_directory (SYSTEM_CONFIG_DIR, &messages);
1131 load_config_directory (config_d_dir, &messages);
1132 g_free (config_d_dir);
1133 messages = g_list_append (messages, g_strdup_printf ("Loading configuration from %s", config_path));
1134 if (!config_load_from_file (config_get_instance (), config_path, &error))
1138 is_empty = error && g_error_matches (error, G_FILE_ERROR, G_FILE_ERROR_NOENT);
1140 if (explicit_config || !is_empty)
1143 g_printerr ("Failed to load configuration from %s: %s\n", config_path, error->message);
1144 exit (EXIT_FAILURE);
1147 g_clear_error (&error);
1148 g_free (config_path);
1150 /* Set default values */
1151 if (!config_has_key (config_get_instance (), "LightDM", "start-default-seat"))
1152 config_set_boolean (config_get_instance (), "LightDM", "start-default-seat", TRUE);
1153 if (!config_has_key (config_get_instance (), "LightDM", "minimum-vt"))
1154 config_set_integer (config_get_instance (), "LightDM", "minimum-vt", 7);
1155 if (!config_has_key (config_get_instance (), "LightDM", "guest-account-script"))
1156 config_set_string (config_get_instance (), "LightDM", "guest-account-script", "guest-account");
1157 if (!config_has_key (config_get_instance (), "LightDM", "greeter-user"))
1158 config_set_string (config_get_instance (), "LightDM", "greeter-user", GREETER_USER);
1159 if (!config_has_key (config_get_instance (), "LightDM", "lock-memory"))
1160 config_set_boolean (config_get_instance (), "LightDM", "lock-memory", TRUE);
1161 if (!config_has_key (config_get_instance (), "SeatDefaults", "type"))
1162 config_set_string (config_get_instance (), "SeatDefaults", "type", "xlocal");
1163 if (!config_has_key (config_get_instance (), "SeatDefaults", "xserver-command"))
1164 config_set_string (config_get_instance (), "SeatDefaults", "xserver-command", "X");
1165 if (!config_has_key (config_get_instance (), "SeatDefaults", "xserver-share"))
1166 config_set_boolean (config_get_instance (), "SeatDefaults", "xserver-share", TRUE);
1167 if (!config_has_key (config_get_instance (), "SeatDefaults", "unity-compositor-command"))
1168 config_set_string (config_get_instance (), "SeatDefaults", "unity-compositor-command", "unity-system-compositor");
1169 if (!config_has_key (config_get_instance (), "SeatDefaults", "start-session"))
1170 config_set_boolean (config_get_instance (), "SeatDefaults", "start-session", TRUE);
1171 if (!config_has_key (config_get_instance (), "SeatDefaults", "allow-guest"))
1172 config_set_boolean (config_get_instance (), "SeatDefaults", "allow-guest", TRUE);
1173 if (!config_has_key (config_get_instance (), "SeatDefaults", "greeter-allow-guest"))
1174 config_set_boolean (config_get_instance (), "SeatDefaults", "greeter-allow-guest", TRUE);
1175 if (!config_has_key (config_get_instance (), "SeatDefaults", "greeter-show-remote-login"))
1176 config_set_boolean (config_get_instance (), "SeatDefaults", "greeter-show-remote-login", TRUE);
1177 if (!config_has_key (config_get_instance (), "SeatDefaults", "greeter-session"))
1178 config_set_string (config_get_instance (), "SeatDefaults", "greeter-session", GREETER_SESSION);
1179 if (!config_has_key (config_get_instance (), "SeatDefaults", "user-session"))
1180 config_set_string (config_get_instance (), "SeatDefaults", "user-session", USER_SESSION);
1181 if (!config_has_key (config_get_instance (), "SeatDefaults", "session-wrapper"))
1182 config_set_string (config_get_instance (), "SeatDefaults", "session-wrapper", "lightdm-session");
1183 if (!config_has_key (config_get_instance (), "LightDM", "log-directory"))
1184 config_set_string (config_get_instance (), "LightDM", "log-directory", default_log_dir);
1185 g_free (default_log_dir);
1186 if (!config_has_key (config_get_instance (), "LightDM", "run-directory"))
1187 config_set_string (config_get_instance (), "LightDM", "run-directory", default_run_dir);
1188 g_free (default_run_dir);
1189 if (!config_has_key (config_get_instance (), "LightDM", "cache-directory"))
1190 config_set_string (config_get_instance (), "LightDM", "cache-directory", default_cache_dir);
1191 g_free (default_cache_dir);
1192 if (!config_has_key (config_get_instance (), "LightDM", "sessions-directory"))
1193 config_set_string (config_get_instance (), "LightDM", "sessions-directory", SESSIONS_DIR);
1194 if (!config_has_key (config_get_instance (), "LightDM", "remote-sessions-directory"))
1195 config_set_string (config_get_instance (), "LightDM", "remote-sessions-directory", REMOTE_SESSIONS_DIR);
1196 if (!config_has_key (config_get_instance (), "LightDM", "greeters-directory"))
1197 config_set_string (config_get_instance (), "LightDM", "greeters-directory", GREETERS_DIR);
1199 /* Override defaults */
1201 config_set_string (config_get_instance (), "LightDM", "log-directory", log_dir);
1204 config_set_string (config_get_instance (), "LightDM", "run-directory", run_dir);
1207 config_set_string (config_get_instance (), "LightDM", "cache-directory", cache_dir);
1210 /* Create run and cache directories */
1211 dir = config_get_string (config_get_instance (), "LightDM", "log-directory");
1212 if (g_mkdir_with_parents (dir, S_IRWXU | S_IXGRP | S_IXOTH) < 0)
1213 g_warning ("Failed to make log directory %s: %s", dir, strerror (errno));
1215 dir = config_get_string (config_get_instance (), "LightDM", "run-directory");
1216 if (g_mkdir_with_parents (dir, S_IRWXU | S_IXGRP | S_IXOTH) < 0)
1217 g_warning ("Failed to make run directory %s: %s", dir, strerror (errno));
1219 dir = config_get_string (config_get_instance (), "LightDM", "cache-directory");
1220 if (g_mkdir_with_parents (dir, S_IRWXU | S_IXGRP | S_IXOTH) < 0)
1221 g_warning ("Failed to make cache directory %s: %s", dir, strerror (errno));
1226 /* Show queued messages once logging is complete */
1227 for (link = messages; link; link = link->next)
1228 g_debug ("%s", (gchar *)link->data);
1229 g_list_free_full (messages, g_free);
1231 g_debug ("Using D-Bus name %s", LIGHTDM_BUS_NAME);
1232 bus_id = g_bus_own_name (getuid () == 0 ? G_BUS_TYPE_SYSTEM : G_BUS_TYPE_SESSION,
1234 G_BUS_NAME_OWNER_FLAGS_NONE,
1242 g_debug ("Running in user mode");
1243 if (getenv ("DISPLAY"))
1244 g_debug ("Using Xephyr for X servers");
1246 display_manager = display_manager_new ();
1247 g_signal_connect (display_manager, "stopped", G_CALLBACK (display_manager_stopped_cb), NULL);
1248 g_signal_connect (display_manager, "seat-removed", G_CALLBACK (display_manager_seat_removed_cb), NULL);
1250 shared_data_manager = shared_data_manager_new ();
1252 /* Load the static display entries */
1253 groups = config_get_groups (config_get_instance ());
1254 for (i = groups; *i; i++)
1256 gchar *config_section = *i;
1260 const gchar *const seatpfx = "Seat:";
1262 if (!g_str_has_prefix (config_section, seatpfx))
1265 g_debug ("Loading seat %s", config_section);
1266 types = config_get_string_list (config_get_instance (), config_section, "type");
1268 types = config_get_string_list (config_get_instance (), "SeatDefaults", "type");
1269 for (type = types; type && *type; type++)
1271 seat = seat_new (*type);
1278 const gsize seatpfxlen = strlen(seatpfx);
1279 gchar *seatname = config_section + seatpfxlen;
1281 seat_set_property (seat, "seat-name", seatname);
1283 set_seat_properties (seat, config_section);
1284 display_manager_add_seat (display_manager, seat);
1285 g_object_unref (seat);
1289 g_warning ("Failed to create seat %s", config_section);
1291 g_strfreev (groups);
1293 /* If no seats start a default one */
1294 if (n_seats == 0 && config_get_boolean (config_get_instance (), "LightDM", "start-default-seat"))
1300 g_debug ("Adding default seat");
1302 types = config_get_string_list (config_get_instance (), "SeatDefaults", "type");
1303 for (type = types; type && *type; type++)
1305 seat = seat_new (*type);
1312 set_seat_properties (seat, NULL);
1313 seat_set_property (seat, "exit-on-failure", "true");
1314 if (!display_manager_add_seat (display_manager, seat))
1315 return EXIT_FAILURE;
1316 g_object_unref (seat);
1320 g_warning ("Failed to create default seat");
1321 return EXIT_FAILURE;
1325 g_main_loop_run (loop);
1327 /* Clean up shared data manager */
1328 g_object_unref (shared_data_manager);
1329 shared_data_manager = NULL;
1331 /* Clean up user list */
1332 common_user_list_cleanup ();
1334 /* Clean up display manager */
1335 g_object_unref (display_manager);
1336 display_manager = NULL;
1338 /* Remove D-Bus interface */
1339 g_dbus_connection_unregister_object (bus, reg_id);
1340 g_bus_unown_name (bus_id);
1341 if (seat_bus_entries)
1342 g_hash_table_unref (seat_bus_entries);
1343 if (session_bus_entries)
1344 g_hash_table_unref (session_bus_entries);
1346 g_debug ("Exiting with return value %d", exit_code);