/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- * * Copyright (C) 2008 William Jon McCann * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * */ #include "config.h" #include #include #include #include #include #include #include #include "common/gdm-common.h" #ifdef WITH_SYSTEMD #include #endif #define GDM_DBUS_NAME "org.gnome.DisplayManager" #define GDM_DBUS_LOCAL_DISPLAY_FACTORY_PATH "/org/gnome/DisplayManager/LocalDisplayFactory" #define GDM_DBUS_LOCAL_DISPLAY_FACTORY_INTERFACE "org.gnome.DisplayManager.LocalDisplayFactory" #ifdef WITH_CONSOLE_KIT #define CK_NAME "org.freedesktop.ConsoleKit" #define CK_PATH "/org/freedesktop/ConsoleKit" #define CK_INTERFACE "org.freedesktop.ConsoleKit" #define CK_MANAGER_PATH "/org/freedesktop/ConsoleKit/Manager" #define CK_MANAGER_INTERFACE "org.freedesktop.ConsoleKit.Manager" #define CK_SEAT_INTERFACE "org.freedesktop.ConsoleKit.Seat" #define CK_SESSION_INTERFACE "org.freedesktop.ConsoleKit.Session" #endif static const char *send_command = NULL; static gboolean use_xnest = FALSE; static gboolean no_lock = FALSE; static gboolean debug_in = FALSE; static gboolean authenticate = FALSE; static gboolean startnew = FALSE; static gboolean monte_carlo_pi = FALSE; static gboolean show_version = FALSE; static char **args_remaining = NULL; /* Keep all config options for compatibility even if they are noops */ GOptionEntry options [] = { { "command", 'c', 0, G_OPTION_ARG_STRING, &send_command, N_("Only the VERSION command is supported"), N_("COMMAND") }, { "xnest", 'n', 0, G_OPTION_ARG_NONE, &use_xnest, N_("Ignored — retained for compatibility"), NULL }, { "no-lock", 'l', 0, G_OPTION_ARG_NONE, &no_lock, N_("Ignored — retained for compatibility"), NULL }, { "debug", 'd', 0, G_OPTION_ARG_NONE, &debug_in, N_("Debugging output"), NULL }, { "authenticate", 'a', 0, G_OPTION_ARG_NONE, &authenticate, N_("Ignored — retained for compatibility"), NULL }, { "startnew", 's', 0, G_OPTION_ARG_NONE, &startnew, N_("Ignored — retained for compatibility"), NULL }, { "monte-carlo-pi", 0, 0, G_OPTION_ARG_NONE, &monte_carlo_pi, NULL, NULL }, { "version", 0, 0, G_OPTION_ARG_NONE, &show_version, N_("Version of this application"), NULL }, { G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_STRING_ARRAY, &args_remaining, NULL, NULL }, { NULL } }; #define GDM_FLEXISERVER_ERROR gdm_flexiserver_error_quark () static GQuark gdm_flexiserver_error_quark (void) { static GQuark ret = 0; if (ret == 0) { ret = g_quark_from_static_string ("gdm_flexiserver_error"); } return ret; } static gboolean is_program_in_path (const char *program) { char *tmp = g_find_program_in_path (program); if (tmp != NULL) { g_free (tmp); return TRUE; } else { return FALSE; } } static void maybe_lock_screen (void) { gboolean use_gscreensaver = FALSE; GError *error = NULL; char *command; if (is_program_in_path ("gnome-screensaver-command")) { use_gscreensaver = TRUE; } else if (! is_program_in_path ("xscreensaver-command")) { return; } if (use_gscreensaver) { command = g_strdup ("gnome-screensaver-command --lock"); } else { command = g_strdup ("xscreensaver-command -lock"); } if (! g_spawn_command_line_async (command, &error)) { g_warning ("Cannot lock screen: %s", error->message); g_error_free (error); } g_free (command); if (! use_gscreensaver) { command = g_strdup ("xscreensaver-command -throttle"); if (! g_spawn_command_line_async (command, &error)) { g_warning ("Cannot disable screensaver engines: %s", error->message); g_error_free (error); } g_free (command); } } static void calc_pi (void) { unsigned long n = 0, h = 0; double x, y; printf ("\n"); for (;;) { x = g_random_double (); y = g_random_double (); if (x*x + y*y <= 1) h++; n++; if ( ! (n & 0xfff)) printf ("pi ~~ %1.10f\t(%lu/%lu * 4) iteration: %lu \r", ((double)h)/(double)n * 4.0, h, n, n); } } static gboolean create_transient_display (GDBusConnection *connection, GError **error) { GError *local_error = NULL; GVariant *reply; const char *value; reply = g_dbus_connection_call_sync (connection, GDM_DBUS_NAME, GDM_DBUS_LOCAL_DISPLAY_FACTORY_PATH, GDM_DBUS_LOCAL_DISPLAY_FACTORY_INTERFACE, "CreateTransientDisplay", NULL, /* parameters */ G_VARIANT_TYPE ("(o)"), G_DBUS_CALL_FLAGS_NONE, -1, NULL, &local_error); if (reply == NULL) { g_warning ("Unable to create transient display: %s", local_error->message); g_propagate_error (error, local_error); return FALSE; } g_variant_get (reply, "(&o)", &value); g_debug ("Started %s", value); g_variant_unref (reply); return TRUE; } #ifdef WITH_CONSOLE_KIT static gboolean get_current_session_id (GDBusConnection *connection, char **session_id) { GError *local_error = NULL; GVariant *reply; reply = g_dbus_connection_call_sync (connection, CK_NAME, CK_MANAGER_PATH, CK_MANAGER_INTERFACE, "GetCurrentSession", NULL, /* parameters */ G_VARIANT_TYPE ("(o)"), G_DBUS_CALL_FLAGS_NONE, -1, NULL, &local_error); if (reply == NULL) { g_warning ("Unable to determine session: %s", local_error->message); g_error_free (local_error); return FALSE; } g_variant_get (reply, "(o)", session_id); g_variant_unref (reply); return TRUE; } static gboolean get_seat_id_for_session (GDBusConnection *connection, const char *session_id, char **seat_id) { GError *local_error = NULL; GVariant *reply; reply = g_dbus_connection_call_sync (connection, CK_NAME, session_id, CK_SESSION_INTERFACE, "GetSeatId", NULL, /* parameters */ G_VARIANT_TYPE ("(o)"), G_DBUS_CALL_FLAGS_NONE, -1, NULL, &local_error); if (reply == NULL) { g_warning ("Unable to determine seat: %s", local_error->message); g_error_free (local_error); return FALSE; } g_variant_get (reply, "(o)", seat_id); g_variant_unref (reply); return TRUE; } static char * get_current_seat_id (GDBusConnection *connection) { gboolean res; char *session_id; char *seat_id; session_id = NULL; seat_id = NULL; res = get_current_session_id (connection, &session_id); if (res) { res = get_seat_id_for_session (connection, session_id, &seat_id); } g_free (session_id); return seat_id; } static gboolean activate_session_id_for_ck (GDBusConnection *connection, const char *seat_id, const char *session_id) { GError *local_error = NULL; GVariant *reply; reply = g_dbus_connection_call_sync (connection, CK_NAME, seat_id, CK_SEAT_INTERFACE, "ActivateSession", g_variant_new ("(o)", session_id), NULL, G_DBUS_CALL_FLAGS_NONE, -1, NULL, &local_error); if (reply == NULL) { g_warning ("Unable to activate session: %s", local_error->message); g_error_free (local_error); return FALSE; } g_variant_unref (reply); return TRUE; } static gboolean session_is_login_window (GDBusConnection *connection, const char *session_id) { GError *local_error = NULL; GVariant *reply; const char *value; gboolean ret; reply = g_dbus_connection_call_sync (connection, CK_NAME, session_id, CK_SESSION_INTERFACE, "GetSessionType", NULL, G_VARIANT_TYPE ("(s)"), G_DBUS_CALL_FLAGS_NONE, -1, NULL, &local_error); if (reply == NULL) { g_warning ("Unable to determine session type: %s", local_error->message); g_error_free (local_error); return FALSE; } g_variant_get (reply, "(&s)", &value); if (value == NULL || value[0] == '\0' || strcmp (value, "LoginWindow") != 0) { ret = FALSE; } else { ret = TRUE; } g_variant_unref (reply); return ret; } static gboolean seat_can_activate_sessions (GDBusConnection *connection, const char *seat_id) { GError *local_error = NULL; GVariant *reply; gboolean ret; reply = g_dbus_connection_call_sync (connection, CK_NAME, seat_id, CK_SEAT_INTERFACE, "CanActivateSessions", NULL, G_VARIANT_TYPE ("(b)"), G_DBUS_CALL_FLAGS_NONE, -1, NULL, &local_error); if (reply == NULL) { g_warning ("Unable to determine if can activate sessions: %s", local_error->message); g_error_free (local_error); return FALSE; } g_variant_get (reply, "(b)", &ret); g_variant_unref (reply); return ret; } static const char ** seat_get_sessions (GDBusConnection *connection, const char *seat_id) { GError *local_error = NULL; GVariant *reply; const char **value; reply = g_dbus_connection_call_sync (connection, CK_NAME, seat_id, CK_SEAT_INTERFACE, "GetSessions", NULL, G_VARIANT_TYPE ("(ao)"), G_DBUS_CALL_FLAGS_NONE, -1, NULL, &local_error); if (reply == NULL) { g_warning ("Unable to list sessions: %s", local_error->message); g_error_free (local_error); return FALSE; } g_variant_get (reply, "(^ao)", &value); g_variant_unref (reply); return value; } static gboolean get_login_window_session_id_for_ck (GDBusConnection *connection, const char *seat_id, char **session_id) { gboolean can_activate_sessions; const char **sessions; int i; *session_id = NULL; sessions = NULL; g_debug ("checking if seat can activate sessions"); can_activate_sessions = seat_can_activate_sessions (connection, seat_id); if (! can_activate_sessions) { g_debug ("seat is unable to activate sessions"); return FALSE; } sessions = seat_get_sessions (connection, seat_id); for (i = 0; sessions [i] != NULL; i++) { const char *ssid; ssid = sessions [i]; if (session_is_login_window (connection, ssid)) { *session_id = g_strdup (ssid); break; } } g_free (sessions); return TRUE; } static gboolean goto_login_session_for_ck (GDBusConnection *connection, GError **error) { gboolean ret; gboolean res; char *session_id; char *seat_id; ret = FALSE; /* First look for any existing LoginWindow sessions on the seat. If none are found, create a new one. */ seat_id = get_current_seat_id (connection); if (seat_id == NULL || seat_id[0] == '\0') { g_debug ("seat id is not set; can't switch sessions"); g_set_error (error, GDM_FLEXISERVER_ERROR, 0, _("Could not identify the current session.")); return FALSE; } res = get_login_window_session_id_for_ck (connection, seat_id, &session_id); if (! res) { g_set_error (error, GDM_FLEXISERVER_ERROR, 1, _("User unable to switch sessions.")); return FALSE; } if (session_id != NULL) { res = activate_session_id_for_ck (connection, seat_id, session_id); if (res) { ret = TRUE; } } if (! ret && g_strcmp0 (seat_id, "/org/freedesktop/ConsoleKit/Seat1") == 0) { res = create_transient_display (connection, error); if (res) { ret = TRUE; } } return ret; } #endif #ifdef WITH_SYSTEMD static gboolean activate_session_id_for_systemd (GDBusConnection *connection, const char *seat_id, const char *session_id) { GError *local_error = NULL; GVariant *reply; reply = g_dbus_connection_call_sync (connection, "org.freedesktop.login1", "/org/freedesktop/login1", "org.freedesktop.login1.Manager", "ActivateSessionOnSeat", g_variant_new ("(ss)", session_id, seat_id), NULL, G_DBUS_CALL_FLAGS_NONE, -1, NULL, &local_error); if (reply == NULL) { g_warning ("Unable to activate session: %s", local_error->message); g_error_free (local_error); return FALSE; } g_variant_unref (reply); return TRUE; } static gboolean get_login_window_session_id_for_systemd (const char *seat_id, char **session_id) { gboolean ret; int res, i; char **sessions; char *service_id; char *service_class; char *state; res = sd_seat_get_sessions (seat_id, &sessions, NULL, NULL); if (res < 0) { g_debug ("Failed to determine sessions: %s", strerror (-res)); return FALSE; } if (sessions == NULL || sessions[0] == NULL) { *session_id = NULL; ret = TRUE; goto out; } for (i = 0; sessions[i]; i ++) { res = sd_session_get_class (sessions[i], &service_class); if (res < 0) { g_debug ("failed to determine class of session %s: %s", sessions[i], strerror (-res)); ret = FALSE; goto out; } if (strcmp (service_class, "greeter") != 0) { free (service_class); continue; } free (service_class); ret = sd_session_get_state (sessions[i], &state); if (ret < 0) { g_debug ("failed to determine state of session %s: %s", sessions[i], strerror (-res)); ret = FALSE; goto out; } if (g_strcmp0 (state, "closing") == 0) { free (state); continue; } free (state); res = sd_session_get_service (sessions[i], &service_id); if (res < 0) { g_debug ("failed to determine service of session %s: %s", sessions[i], strerror (-res)); ret = FALSE; goto out; } if (strcmp (service_id, "gdm-welcome") == 0) { *session_id = g_strdup (sessions[i]); ret = TRUE; free (service_id); goto out; } free (service_id); } *session_id = NULL; ret = TRUE; out: for (i = 0; sessions[i]; i ++) { free (sessions[i]); } free (sessions); return ret; } static gboolean goto_login_session_for_systemd (GDBusConnection *connection, GError **error) { gboolean ret; int res; char *our_session; char *session_id; char *seat_id; ret = FALSE; session_id = NULL; seat_id = NULL; /* First look for any existing LoginWindow sessions on the seat. If none are found, create a new one. */ /* Note that we mostly use free () here, instead of g_free () * since the data allocated is from libsystemd-logind, which * does not use GLib's g_malloc (). */ res = sd_pid_get_session (0, &our_session); if (res < 0) { g_debug ("failed to determine own session: %s", strerror (-res)); g_set_error (error, GDM_FLEXISERVER_ERROR, 0, _("Could not identify the current session.")); return FALSE; } res = sd_session_get_seat (our_session, &seat_id); free (our_session); if (res < 0) { g_debug ("failed to determine own seat: %s", strerror (-res)); g_set_error (error, GDM_FLEXISERVER_ERROR, 0, _("Could not identify the current seat.")); return FALSE; } res = sd_seat_can_multi_session (seat_id); if (res < 0) { free (seat_id); g_debug ("failed to determine whether seat can do multi session: %s", strerror (-res)); g_set_error (error, GDM_FLEXISERVER_ERROR, 0, _("The system is unable to determine whether to switch to an existing login screen or start up a new login screen.")); return FALSE; } if (res == 0) { free (seat_id); g_set_error (error, GDM_FLEXISERVER_ERROR, 0, _("The system is unable to start up a new login screen.")); return FALSE; } res = get_login_window_session_id_for_systemd (seat_id, &session_id); if (res && session_id != NULL) { res = activate_session_id_for_systemd (connection, seat_id, session_id); if (res) { ret = TRUE; } } if (! ret && g_strcmp0 (seat_id, "seat0") == 0) { res = create_transient_display (connection, error); if (res) { ret = TRUE; } } free (seat_id); g_free (session_id); return ret; } #endif static gboolean goto_login_session (GError **error) { GError *local_error; GDBusConnection *connection; local_error = NULL; connection = g_bus_get_sync (G_BUS_TYPE_SYSTEM, NULL, &local_error); if (connection == NULL) { g_debug ("Failed to connect to the D-Bus daemon: %s", local_error->message); g_propagate_error (error, local_error); return FALSE; } #ifdef WITH_SYSTEMD if (LOGIND_RUNNING()) { return goto_login_session_for_systemd (connection, error); } #endif #ifdef WITH_CONSOLE_KIT return goto_login_session_for_ck (connection, error); #endif } int main (int argc, char *argv[]) { GOptionContext *ctx; gboolean res; GError *error; bindtextdomain (GETTEXT_PACKAGE, GNOMELOCALEDIR); bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8"); textdomain (GETTEXT_PACKAGE); setlocale (LC_ALL, ""); /* Option parsing */ ctx = g_option_context_new (_("- New GDM login")); g_option_context_set_translation_domain (ctx, GETTEXT_PACKAGE); g_option_context_add_main_entries (ctx, options, NULL); g_option_context_parse (ctx, &argc, &argv, NULL); g_option_context_free (ctx); if (show_version) { g_print ("%s %s\n", argv [0], VERSION); exit (1); } /* don't support commands other than VERSION */ if (send_command != NULL) { if (strcmp (send_command, "VERSION") == 0) { g_print ("GDM %s \n", VERSION); return 0; } else { g_warning ("No longer supported"); } return 1; } gtk_init (&argc, &argv); if (monte_carlo_pi) { calc_pi (); return 0; } if (args_remaining != NULL && args_remaining[0] != NULL) { } if (use_xnest) { g_warning ("Not yet implemented"); return 1; } error = NULL; res = goto_login_session (&error); if (! res) { GtkWidget *dialog; char *message; if (error != NULL) { message = g_strdup_printf ("%s", error->message); g_error_free (error); } else { message = g_strdup (""); } dialog = gtk_message_dialog_new (NULL, GTK_DIALOG_DESTROY_WITH_PARENT, GTK_MESSAGE_ERROR, GTK_BUTTONS_CLOSE, "%s", _("Unable to start new display")); gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (dialog), "%s", message); g_free (message); gtk_window_set_title (GTK_WINDOW (dialog), ""); gtk_window_set_icon_name (GTK_WINDOW (dialog), "session-properties"); gtk_container_set_border_width (GTK_CONTAINER (dialog), 5); gtk_box_set_spacing (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dialog))), 14); gtk_dialog_run (GTK_DIALOG (dialog)); gtk_widget_destroy (dialog); } else { maybe_lock_screen (); } return 1; }