From 1b4182269b60c9fb774f24a3828d209ddaf3f486 Mon Sep 17 00:00:00 2001 From: Tim Lunn Date: Tue, 9 Oct 2012 05:15:30 +1100 Subject: utils: reintroduce gdmflexiserver Partial revert of 920b38e2aac1f79100ed86a0296bbcaf4fecabd9 to reinstroduce gdmflexiserver since gnome-screensaver depends on it. https://bugzilla.gnome.org/show_bug.cgi?id=685622 --- utils/Makefile.am | 11 + utils/gdmflexiserver.c | 780 +++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 791 insertions(+) create mode 100644 utils/gdmflexiserver.c (limited to 'utils') diff --git a/utils/Makefile.am b/utils/Makefile.am index eaf98696..1cda413d 100644 --- a/utils/Makefile.am +++ b/utils/Makefile.am @@ -21,9 +21,20 @@ edit = sed \ -e 's|@GDM_PID_FILE[@]|$(GDM_PID_FILE)|g' bin_PROGRAMS = \ + gdmflexiserver \ gdm-screenshot \ $(NULL) +gdmflexiserver_SOURCES = \ + gdmflexiserver.c \ + $(NULL) + +gdmflexiserver_LDADD = \ + $(GTK_LIBS) \ + $(COMMON_LIBS) \ + $(SYSTEMD_LIBS) \ + $(NULL) + gdm_screenshot_SOURCES = \ gdm-screenshot.c \ $(NULL) diff --git a/utils/gdmflexiserver.c b/utils/gdmflexiserver.c new file mode 100644 index 00000000..d1b72fe6 --- /dev/null +++ b/utils/gdmflexiserver.c @@ -0,0 +1,780 @@ +/* -*- 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 + +#ifdef WITH_SYSTEMD +#include +#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 (sd_booted () > 0) { + 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; +} -- cgit v1.2.1