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
21 #include "ldm-marshal.h"
22 #include "configuration.h"
30 static guint signals[LAST_SIGNAL] = { 0 };
34 /* Session running on */
37 /* PAM service to authenticate with */
39 gchar *autologin_pam_service;
41 /* Buffer for data read from greeter */
44 gboolean use_secure_memory;
46 /* Hints for the greeter */
49 /* Default session to use */
50 gchar *default_session;
52 /* Sequence number of current PAM session */
53 guint32 authentication_sequence_number;
55 /* Remote session name */
56 gchar *remote_session;
58 /* PAM session being constructed by the greeter */
59 Session *authentication_session;
61 /* TRUE if a user has been authenticated and the session requested to start */
62 gboolean start_session;
64 /* TRUE if can log into guest accounts */
67 /* TRUE if logging into guest session */
68 gboolean guest_account_authenticated;
70 /* Communication channels to communicate with */
71 GIOChannel *to_greeter_channel;
72 GIOChannel *from_greeter_channel;
75 G_DEFINE_TYPE (Greeter, greeter, G_TYPE_OBJECT);
77 /* Messages from the greeter to the server */
80 GREETER_MESSAGE_CONNECT = 0,
81 GREETER_MESSAGE_AUTHENTICATE,
82 GREETER_MESSAGE_AUTHENTICATE_AS_GUEST,
83 GREETER_MESSAGE_CONTINUE_AUTHENTICATION,
84 GREETER_MESSAGE_START_SESSION,
85 GREETER_MESSAGE_CANCEL_AUTHENTICATION,
86 GREETER_MESSAGE_SET_LANGUAGE,
87 GREETER_MESSAGE_AUTHENTICATE_REMOTE
90 /* Messages from the server to the greeter */
93 SERVER_MESSAGE_CONNECTED = 0,
94 SERVER_MESSAGE_PROMPT_AUTHENTICATION,
95 SERVER_MESSAGE_END_AUTHENTICATION,
96 SERVER_MESSAGE_SESSION_RESULT
99 static gboolean read_cb (GIOChannel *source, GIOCondition condition, gpointer data);
102 greeter_new (Session *session, const gchar *pam_service, const gchar *autologin_pam_service)
106 greeter = g_object_new (GREETER_TYPE, NULL);
107 greeter->priv->session = g_object_ref (session);
108 greeter->priv->pam_service = g_strdup (pam_service);
109 greeter->priv->autologin_pam_service = g_strdup (autologin_pam_service);
110 greeter->priv->use_secure_memory = config_get_boolean (config_get_instance (), "LightDM", "lock-memory");
116 greeter_set_allow_guest (Greeter *greeter, gboolean allow_guest)
118 greeter->priv->allow_guest = allow_guest;
122 greeter_set_hint (Greeter *greeter, const gchar *name, const gchar *value)
124 g_hash_table_insert (greeter->priv->hints, g_strdup (name), g_strdup (value));
128 secure_malloc (Greeter *greeter, size_t n)
130 if (greeter->priv->use_secure_memory)
131 return gcry_malloc_secure (n);
137 secure_realloc (Greeter *greeter, void *ptr, size_t n)
139 if (greeter->priv->use_secure_memory)
140 return gcry_realloc (ptr, n);
142 return g_realloc (ptr, n);
146 secure_free (Greeter *greeter, void *ptr)
148 if (greeter->priv->use_secure_memory)
149 return gcry_free (ptr);
160 #define HEADER_SIZE (sizeof (guint32) * 2)
161 #define MAX_MESSAGE_LENGTH 1024
164 write_message (Greeter *greeter, guint8 *message, gsize message_length)
166 GError *error = NULL;
168 g_io_channel_write_chars (greeter->priv->to_greeter_channel, (gchar *) message, message_length, NULL, &error);
170 g_warning ("Error writing to greeter: %s", error->message);
171 g_clear_error (&error);
172 g_io_channel_flush (greeter->priv->to_greeter_channel, NULL);
176 write_int (guint8 *buffer, gint buffer_length, guint32 value, gsize *offset)
178 if (*offset + 4 >= buffer_length)
180 buffer[*offset] = value >> 24;
181 buffer[*offset+1] = (value >> 16) & 0xFF;
182 buffer[*offset+2] = (value >> 8) & 0xFF;
183 buffer[*offset+3] = value & 0xFF;
188 write_string (guint8 *buffer, gint buffer_length, const gchar *value, gsize *offset)
193 length = strlen (value);
196 write_int (buffer, buffer_length, length, offset);
197 if (*offset + length >= buffer_length)
201 memcpy (buffer + *offset, value, length);
207 write_header (guint8 *buffer, gint buffer_length, guint32 id, guint32 length, gsize *offset)
209 write_int (buffer, buffer_length, id, offset);
210 write_int (buffer, buffer_length, length, offset);
214 string_length (const gchar *value)
217 return int_length ();
219 return int_length () + strlen (value);
223 handle_connect (Greeter *greeter, const gchar *version)
225 guint8 message[MAX_MESSAGE_LENGTH];
231 g_debug ("Greeter connected version=%s", version);
233 length = string_length (VERSION);
234 g_hash_table_iter_init (&iter, greeter->priv->hints);
235 while (g_hash_table_iter_next (&iter, &key, &value))
236 length += string_length (key) + string_length (value);
238 write_header (message, MAX_MESSAGE_LENGTH, SERVER_MESSAGE_CONNECTED, length, &offset);
239 write_string (message, MAX_MESSAGE_LENGTH, VERSION, &offset);
240 g_hash_table_iter_init (&iter, greeter->priv->hints);
241 while (g_hash_table_iter_next (&iter, &key, &value))
243 write_string (message, MAX_MESSAGE_LENGTH, key, &offset);
244 write_string (message, MAX_MESSAGE_LENGTH, value, &offset);
246 write_message (greeter, message, offset);
248 g_signal_emit (greeter, signals[CONNECTED], 0);
252 pam_messages_cb (Session *session, Greeter *greeter)
256 guint8 message[MAX_MESSAGE_LENGTH];
257 const struct pam_message *messages;
262 messages = session_get_messages (session);
263 messages_length = session_get_messages_length (session);
265 /* Respond to d-bus query with messages */
266 g_debug ("Prompt greeter with %d message(s)", messages_length);
267 size = int_length () + string_length (session_get_username (session)) + int_length ();
268 for (i = 0; i < messages_length; i++)
269 size += int_length () + string_length (messages[i].msg);
271 write_header (message, MAX_MESSAGE_LENGTH, SERVER_MESSAGE_PROMPT_AUTHENTICATION, size, &offset);
272 write_int (message, MAX_MESSAGE_LENGTH, greeter->priv->authentication_sequence_number, &offset);
273 write_string (message, MAX_MESSAGE_LENGTH, session_get_username (session), &offset);
274 write_int (message, MAX_MESSAGE_LENGTH, messages_length, &offset);
275 for (i = 0; i < messages_length; i++)
277 write_int (message, MAX_MESSAGE_LENGTH, messages[i].msg_style, &offset);
278 write_string (message, MAX_MESSAGE_LENGTH, messages[i].msg, &offset);
280 if (messages[i].msg_style == PAM_PROMPT_ECHO_OFF || messages[i].msg_style == PAM_PROMPT_ECHO_ON)
283 write_message (greeter, message, offset);
285 /* Continue immediately if nothing to respond with */
286 // FIXME: Should probably give the greeter a chance to ack the message
289 struct pam_response *response;
290 response = calloc (messages_length, sizeof (struct pam_response));
291 session_respond (greeter->priv->authentication_session, response);
297 send_end_authentication (Greeter *greeter, guint32 sequence_number, const gchar *username, int result)
299 guint8 message[MAX_MESSAGE_LENGTH];
302 write_header (message, MAX_MESSAGE_LENGTH, SERVER_MESSAGE_END_AUTHENTICATION, int_length () + string_length (username) + int_length (), &offset);
303 write_int (message, MAX_MESSAGE_LENGTH, sequence_number, &offset);
304 write_string (message, MAX_MESSAGE_LENGTH, username, &offset);
305 write_int (message, MAX_MESSAGE_LENGTH, result, &offset);
306 write_message (greeter, message, offset);
310 authentication_complete_cb (Session *session, Greeter *greeter)
314 g_debug ("Authenticate result for user %s: %s", session_get_username (session), session_get_authentication_result_string (session));
316 result = session_get_authentication_result (session);
317 if (session_get_is_authenticated (session))
319 if (session_get_user (session))
320 g_debug ("User %s authorized", session_get_username (session));
323 g_debug ("User %s authorized, but no account of that name exists", session_get_username (session));
324 result = PAM_USER_UNKNOWN;
328 send_end_authentication (greeter, greeter->priv->authentication_sequence_number, session_get_username (session), result);
332 reset_session (Greeter *greeter)
334 g_free (greeter->priv->remote_session);
335 greeter->priv->remote_session = NULL;
336 if (greeter->priv->authentication_session)
338 g_signal_handlers_disconnect_matched (greeter->priv->authentication_session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, greeter);
339 session_stop (greeter->priv->authentication_session);
340 g_object_unref (greeter->priv->authentication_session);
341 greeter->priv->authentication_session = NULL;
344 greeter->priv->guest_account_authenticated = FALSE;
348 handle_login (Greeter *greeter, guint32 sequence_number, const gchar *username)
350 const gchar *autologin_username, *service;
351 gboolean is_interactive;
353 if (username[0] == '\0')
355 g_debug ("Greeter start authentication");
359 g_debug ("Greeter start authentication for %s", username);
361 reset_session (greeter);
363 greeter->priv->authentication_sequence_number = sequence_number;
364 g_signal_emit (greeter, signals[CREATE_SESSION], 0, &greeter->priv->authentication_session);
365 if (!greeter->priv->authentication_session)
367 send_end_authentication (greeter, sequence_number, "", PAM_USER_UNKNOWN);
371 g_signal_connect (G_OBJECT (greeter->priv->authentication_session), "got-messages", G_CALLBACK (pam_messages_cb), greeter);
372 g_signal_connect (G_OBJECT (greeter->priv->authentication_session), "authentication-complete", G_CALLBACK (authentication_complete_cb), greeter);
374 /* Use non-interactive service for autologin user */
375 autologin_username = g_hash_table_lookup (greeter->priv->hints, "autologin-user");
376 if (autologin_username != NULL && g_strcmp0 (username, autologin_username) == 0)
378 service = greeter->priv->autologin_pam_service;
379 is_interactive = FALSE;
383 service = greeter->priv->pam_service;
384 is_interactive = TRUE;
387 /* Run the session process */
388 session_set_pam_service (greeter->priv->authentication_session, service);
389 session_set_username (greeter->priv->authentication_session, username);
390 session_set_do_authenticate (greeter->priv->authentication_session, TRUE);
391 session_set_is_interactive (greeter->priv->authentication_session, is_interactive);
392 session_start (greeter->priv->authentication_session);
396 handle_login_as_guest (Greeter *greeter, guint32 sequence_number)
398 g_debug ("Greeter start authentication for guest account");
400 reset_session (greeter);
402 if (!greeter->priv->allow_guest)
404 g_debug ("Guest account is disabled");
405 send_end_authentication (greeter, sequence_number, "", PAM_USER_UNKNOWN);
409 greeter->priv->guest_account_authenticated = TRUE;
410 send_end_authentication (greeter, sequence_number, "", PAM_SUCCESS);
414 get_remote_session_service (const gchar *session_name)
416 GKeyFile *session_desktop_file;
419 gchar *remote_sessions_dir, *filename, *path, *service = NULL;
420 GError *error = NULL;
422 /* Validate session name doesn't contain directory separators */
423 for (c = session_name; *c; c++)
429 /* Load the session file */
430 session_desktop_file = g_key_file_new ();
431 filename = g_strdup_printf ("%s.desktop", session_name);
432 remote_sessions_dir = config_get_string (config_get_instance (), "LightDM", "remote-sessions-directory");
433 path = g_build_filename (remote_sessions_dir, filename, NULL);
434 g_free (remote_sessions_dir);
436 result = g_key_file_load_from_file (session_desktop_file, path, G_KEY_FILE_NONE, &error);
438 g_debug ("Failed to load session file %s: %s", path, error->message);
440 g_clear_error (&error);
442 service = g_key_file_get_string (session_desktop_file, G_KEY_FILE_DESKTOP_GROUP, "X-LightDM-PAM-Service", NULL);
443 g_key_file_free (session_desktop_file);
449 handle_login_remote (Greeter *greeter, const gchar *session_name, const gchar *username, guint32 sequence_number)
453 if (username[0] == '\0')
455 g_debug ("Greeter start authentication for remote session %s", session_name);
459 g_debug ("Greeter start authentication for remote session %s as user %s", session_name, username);
461 reset_session (greeter);
463 service = get_remote_session_service (session_name);
466 send_end_authentication (greeter, sequence_number, "", PAM_SYSTEM_ERR);
470 greeter->priv->authentication_sequence_number = sequence_number;
471 greeter->priv->remote_session = g_strdup (session_name);
472 g_signal_emit (greeter, signals[CREATE_SESSION], 0, &greeter->priv->authentication_session);
473 if (greeter->priv->authentication_session)
475 g_signal_connect (G_OBJECT (greeter->priv->authentication_session), "got-messages", G_CALLBACK (pam_messages_cb), greeter);
476 g_signal_connect (G_OBJECT (greeter->priv->authentication_session), "authentication-complete", G_CALLBACK (authentication_complete_cb), greeter);
478 /* Run the session process */
479 session_set_pam_service (greeter->priv->authentication_session, service);
480 session_set_username (greeter->priv->authentication_session, username);
481 session_set_do_authenticate (greeter->priv->authentication_session, TRUE);
482 session_set_is_interactive (greeter->priv->authentication_session, TRUE);
483 session_set_is_guest (greeter->priv->authentication_session, TRUE);
484 session_start (greeter->priv->authentication_session);
489 if (!greeter->priv->authentication_session)
491 send_end_authentication (greeter, sequence_number, "", PAM_USER_UNKNOWN);
497 handle_continue_authentication (Greeter *greeter, gchar **secrets)
500 const struct pam_message *messages;
501 struct pam_response *response;
502 int i, j, n_prompts = 0;
504 /* Not in authentication */
505 if (greeter->priv->authentication_session == NULL)
508 messages_length = session_get_messages_length (greeter->priv->authentication_session);
509 messages = session_get_messages (greeter->priv->authentication_session);
511 /* Check correct number of responses */
512 for (i = 0; i < messages_length; i++)
514 int msg_style = messages[i].msg_style;
515 if (msg_style == PAM_PROMPT_ECHO_OFF || msg_style == PAM_PROMPT_ECHO_ON)
518 if (g_strv_length (secrets) != n_prompts)
520 session_respond_error (greeter->priv->authentication_session, PAM_CONV_ERR);
524 g_debug ("Continue authentication");
527 response = calloc (messages_length, sizeof (struct pam_response));
528 for (i = 0, j = 0; i < messages_length; i++)
530 int msg_style = messages[i].msg_style;
531 if (msg_style == PAM_PROMPT_ECHO_OFF || msg_style == PAM_PROMPT_ECHO_ON)
533 size_t secret_length = strlen (secrets[j]) + 1;
534 response[i].resp = secure_malloc (greeter, secret_length);
535 memcpy (response[i].resp, secrets[j], secret_length); // FIXME: Need to convert from UTF-8
540 session_respond (greeter->priv->authentication_session, response);
542 for (i = 0; i < messages_length; i++)
543 secure_free (greeter, response[i].resp);
548 handle_cancel_authentication (Greeter *greeter)
550 /* Not in authentication */
551 if (greeter->priv->authentication_session == NULL)
554 g_debug ("Cancel authentication");
555 reset_session (greeter);
559 handle_start_session (Greeter *greeter, const gchar *session)
562 guint8 message[MAX_MESSAGE_LENGTH];
564 SessionType session_type = SESSION_TYPE_LOCAL;
566 if (strcmp (session, "") == 0)
569 /* Use session type chosen in remote session */
570 if (greeter->priv->remote_session)
572 session_type = SESSION_TYPE_REMOTE;
573 session = greeter->priv->remote_session;
576 if (greeter->priv->guest_account_authenticated || session_get_is_authenticated (greeter->priv->authentication_session))
579 g_debug ("Greeter requests session %s", session);
581 g_debug ("Greeter requests default session");
582 greeter->priv->start_session = TRUE;
583 g_signal_emit (greeter, signals[START_SESSION], 0, session_type, session, &result);
587 g_debug ("Ignoring start session request, user is not authorized");
591 write_header (message, MAX_MESSAGE_LENGTH, SERVER_MESSAGE_SESSION_RESULT, int_length (), &offset);
592 write_int (message, MAX_MESSAGE_LENGTH, result ? 0 : 1, &offset);
593 write_message (greeter, message, offset);
597 handle_set_language (Greeter *greeter, const gchar *language)
601 if (!greeter->priv->guest_account_authenticated && !session_get_is_authenticated (greeter->priv->authentication_session))
603 g_debug ("Ignoring set language request, user is not authorized");
607 // FIXME: Could use this
608 if (greeter->priv->guest_account_authenticated)
610 g_debug ("Ignoring set language request for guest user");
614 g_debug ("Greeter sets language %s", language);
615 user = session_get_user (greeter->priv->authentication_session);
616 user_set_language (user, language);
620 read_int (Greeter *greeter, gsize *offset)
624 if (greeter->priv->n_read - *offset < sizeof (guint32))
626 g_warning ("Not enough space for int, need %zu, got %zu", sizeof (guint32), greeter->priv->n_read - *offset);
629 buffer = greeter->priv->read_buffer + *offset;
630 value = buffer[0] << 24 | buffer[1] << 16 | buffer[2] << 8 | buffer[3];
631 *offset += int_length ();
636 get_message_length (Greeter *greeter)
641 offset = int_length ();
642 payload_length = read_int (greeter, &offset);
644 if (HEADER_SIZE + payload_length < HEADER_SIZE)
646 g_warning ("Payload length of %u octets too long", payload_length);
650 return HEADER_SIZE + payload_length;
654 read_string_full (Greeter *greeter, gsize *offset, void* (*alloc_fn)(size_t n))
659 length = read_int (greeter, offset);
660 if (greeter->priv->n_read - *offset < length)
662 g_warning ("Not enough space for string, need %u, got %zu", length, greeter->priv->n_read - *offset);
663 return g_strdup ("");
666 value = (*alloc_fn) (sizeof (gchar *) * (length + 1));
667 memcpy (value, greeter->priv->read_buffer + *offset, length);
668 value[length] = '\0';
675 read_string (Greeter *greeter, gsize *offset)
677 return read_string_full (greeter, offset, g_malloc);
681 read_secret (Greeter *greeter, gsize *offset)
683 if (greeter->priv->use_secure_memory)
684 return read_string_full (greeter, offset, gcry_malloc_secure);
686 return read_string_full (greeter, offset, g_malloc);
690 read_cb (GIOChannel *source, GIOCondition condition, gpointer data)
692 Greeter *greeter = data;
693 gsize n_to_read, n_read, offset;
696 guint32 sequence_number, n_secrets, max_secrets;
697 gchar *version, *username, *session_name, *language;
699 GError *error = NULL;
701 if (condition == G_IO_HUP)
703 g_debug ("Greeter closed communication channel");
707 n_to_read = HEADER_SIZE;
708 if (greeter->priv->n_read >= HEADER_SIZE)
710 n_to_read = get_message_length (greeter);
711 if (n_to_read <= HEADER_SIZE)
715 status = g_io_channel_read_chars (greeter->priv->from_greeter_channel,
716 (gchar *) greeter->priv->read_buffer + greeter->priv->n_read,
717 n_to_read - greeter->priv->n_read,
721 g_warning ("Error reading from greeter: %s", error->message);
722 g_clear_error (&error);
723 if (status != G_IO_STATUS_NORMAL)
726 greeter->priv->n_read += n_read;
727 if (greeter->priv->n_read != n_to_read)
730 /* If have header, rerun for content */
731 if (greeter->priv->n_read == HEADER_SIZE)
733 n_to_read = get_message_length (greeter);
734 if (n_to_read > HEADER_SIZE)
736 greeter->priv->read_buffer = secure_realloc (greeter, greeter->priv->read_buffer, n_to_read);
737 read_cb (source, condition, greeter);
743 id = read_int (greeter, &offset);
744 read_int (greeter, &offset);
747 case GREETER_MESSAGE_CONNECT:
748 version = read_string (greeter, &offset);
749 handle_connect (greeter, version);
752 case GREETER_MESSAGE_AUTHENTICATE:
753 sequence_number = read_int (greeter, &offset);
754 username = read_string (greeter, &offset);
755 handle_login (greeter, sequence_number, username);
758 case GREETER_MESSAGE_AUTHENTICATE_AS_GUEST:
759 sequence_number = read_int (greeter, &offset);
760 handle_login_as_guest (greeter, sequence_number);
762 case GREETER_MESSAGE_AUTHENTICATE_REMOTE:
763 sequence_number = read_int (greeter, &offset);
764 session_name = read_string (greeter, &offset);
765 username = read_string (greeter, &offset);
766 handle_login_remote (greeter, session_name, username, sequence_number);
768 case GREETER_MESSAGE_CONTINUE_AUTHENTICATION:
769 n_secrets = read_int (greeter, &offset);
770 max_secrets = (G_MAXUINT32 - 1) / sizeof (gchar *);
771 if (n_secrets > max_secrets)
773 g_warning ("Array length of %u elements too long", n_secrets);
776 secrets = g_malloc (sizeof (gchar *) * (n_secrets + 1));
777 for (i = 0; i < n_secrets; i++)
778 secrets[i] = read_secret (greeter, &offset);
780 handle_continue_authentication (greeter, secrets);
781 for (i = 0; i < n_secrets; i++)
782 secure_free (greeter, secrets[i]);
785 case GREETER_MESSAGE_CANCEL_AUTHENTICATION:
786 handle_cancel_authentication (greeter);
788 case GREETER_MESSAGE_START_SESSION:
789 session_name = read_string (greeter, &offset);
790 handle_start_session (greeter, session_name);
791 g_free (session_name);
793 case GREETER_MESSAGE_SET_LANGUAGE:
794 language = read_string (greeter, &offset);
795 handle_set_language (greeter, language);
799 g_warning ("Unknown message from greeter: %d", id);
803 greeter->priv->n_read = 0;
809 greeter_get_session (Greeter *greeter)
811 g_return_val_if_fail (greeter != NULL, NULL);
812 return greeter->priv->session;
816 greeter_get_guest_authenticated (Greeter *greeter)
818 g_return_val_if_fail (greeter != NULL, FALSE);
819 return greeter->priv->guest_account_authenticated;
823 greeter_get_authentication_session (Greeter *greeter)
825 g_return_val_if_fail (greeter != NULL, NULL);
826 return greeter->priv->authentication_session;
830 greeter_get_start_session (Greeter *greeter)
832 g_return_val_if_fail (greeter != NULL, FALSE);
833 return greeter->priv->start_session;
837 greeter_start (Greeter *greeter)
839 int to_greeter_pipe[2], from_greeter_pipe[2];
840 gboolean result = FALSE;
843 /* Create a pipe to talk with the greeter */
844 if (pipe (to_greeter_pipe) != 0 || pipe (from_greeter_pipe) != 0)
846 g_warning ("Failed to create pipes: %s", strerror (errno));
849 greeter->priv->to_greeter_channel = g_io_channel_unix_new (to_greeter_pipe[1]);
850 g_io_channel_set_encoding (greeter->priv->to_greeter_channel, NULL, NULL);
851 greeter->priv->from_greeter_channel = g_io_channel_unix_new (from_greeter_pipe[0]);
852 g_io_channel_set_encoding (greeter->priv->from_greeter_channel, NULL, NULL);
853 g_io_channel_set_buffered (greeter->priv->from_greeter_channel, FALSE);
854 g_io_add_watch (greeter->priv->from_greeter_channel, G_IO_IN | G_IO_HUP, read_cb, greeter);
856 /* Let the greeter session know how to communicate with the daemon */
857 value = g_strdup_printf ("%d", from_greeter_pipe[1]);
858 session_set_env (greeter->priv->session, "LIGHTDM_TO_SERVER_FD", value);
860 value = g_strdup_printf ("%d", to_greeter_pipe[0]);
861 session_set_env (greeter->priv->session, "LIGHTDM_FROM_SERVER_FD", value);
864 /* Don't allow the daemon end of the pipes to be accessed in child processes */
865 fcntl (to_greeter_pipe[1], F_SETFD, FD_CLOEXEC);
866 fcntl (from_greeter_pipe[0], F_SETFD, FD_CLOEXEC);
868 result = session_start (greeter->priv->session);
870 /* Close the session ends of the pipe */
871 close (to_greeter_pipe[0]);
872 close (from_greeter_pipe[1]);
878 greeter_real_create_session (Greeter *greeter)
884 greeter_real_start_session (Greeter *greeter, SessionType type, const gchar *session)
890 greeter_init (Greeter *greeter)
892 greeter->priv = G_TYPE_INSTANCE_GET_PRIVATE (greeter, GREETER_TYPE, GreeterPrivate);
893 greeter->priv->read_buffer = secure_malloc (greeter, HEADER_SIZE);
894 greeter->priv->hints = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
898 greeter_finalize (GObject *object)
902 self = GREETER (object);
904 g_signal_handlers_disconnect_matched (self->priv->session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, self);
905 g_object_unref (self->priv->session);
906 g_free (self->priv->pam_service);
907 g_free (self->priv->autologin_pam_service);
908 secure_free (self, self->priv->read_buffer);
909 g_hash_table_unref (self->priv->hints);
910 g_free (self->priv->remote_session);
911 if (self->priv->authentication_session)
913 g_signal_handlers_disconnect_matched (self->priv->authentication_session, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, self);
914 g_object_unref (self->priv->authentication_session);
916 if (self->priv->to_greeter_channel)
917 g_io_channel_unref (self->priv->to_greeter_channel);
918 if (self->priv->from_greeter_channel)
919 g_io_channel_unref (self->priv->from_greeter_channel);
921 G_OBJECT_CLASS (greeter_parent_class)->finalize (object);
925 greeter_class_init (GreeterClass *klass)
927 GObjectClass *object_class = G_OBJECT_CLASS (klass);
929 klass->create_session = greeter_real_create_session;
930 klass->start_session = greeter_real_start_session;
931 object_class->finalize = greeter_finalize;
934 g_signal_new ("connected",
935 G_TYPE_FROM_CLASS (klass),
937 G_STRUCT_OFFSET (GreeterClass, connected),
939 g_cclosure_marshal_VOID__VOID,
942 signals[CREATE_SESSION] =
943 g_signal_new ("create-session",
944 G_TYPE_FROM_CLASS (klass),
946 G_STRUCT_OFFSET (GreeterClass, create_session),
947 g_signal_accumulator_first_wins,
949 ldm_marshal_OBJECT__VOID,
952 signals[START_SESSION] =
953 g_signal_new ("start-session",
954 G_TYPE_FROM_CLASS (klass),
956 G_STRUCT_OFFSET (GreeterClass, start_session),
957 g_signal_accumulator_true_handled,
959 ldm_marshal_BOOLEAN__INT_STRING,
960 G_TYPE_BOOLEAN, 2, G_TYPE_INT, G_TYPE_STRING);
962 g_type_class_add_private (klass, sizeof (GreeterPrivate));