diff options
Diffstat (limited to 'mate-session/gsm-systemd.c')
| -rw-r--r-- | mate-session/gsm-systemd.c | 776 |
1 files changed, 776 insertions, 0 deletions
diff --git a/mate-session/gsm-systemd.c b/mate-session/gsm-systemd.c new file mode 100644 index 0000000..050d931 --- /dev/null +++ b/mate-session/gsm-systemd.c @@ -0,0 +1,776 @@ +/* + * Copyright (C) 2013 Stefano Karapetsas <[email protected]> + * + * 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, 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 St, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#include "config.h" + +#include <errno.h> +#include <string.h> +#include <unistd.h> +#include <sys/types.h> + +#include <glib.h> +#include <glib-object.h> +#include <glib/gi18n.h> + +#include <dbus/dbus-glib.h> +#include <dbus/dbus-glib-lowlevel.h> + +#ifdef HAVE_SYSTEMD +#include <systemd/sd-login.h> +#endif + +#include "gsm-marshal.h" +#include "gsm-systemd.h" + +#define SD_NAME "org.freedesktop.login1" +#define SD_PATH "/org/freedesktop/login1" +#define SD_INTERFACE "org.freedesktop.login1.Manager" +#define SD_SEAT_INTERFACE "org.freedesktop.login1.Seat" +#define SD_SESSION_INTERFACE "org.freedesktop.login1.Session" + +#define GSM_SYSTEMD_GET_PRIVATE(o) \ + (G_TYPE_INSTANCE_GET_PRIVATE ((o), GSM_TYPE_SYSTEMD, GsmSystemdPrivate)) + +struct _GsmSystemdPrivate +{ + DBusGConnection *dbus_connection; + DBusGProxy *bus_proxy; + DBusGProxy *sd_proxy; + guint32 is_connected : 1; +}; + +enum { + PROP_0, + PROP_IS_CONNECTED +}; + +enum { + REQUEST_COMPLETED = 0, + PRIVILEGES_COMPLETED, + LAST_SIGNAL +}; + +static guint signals[LAST_SIGNAL] = { 0 }; + +static void gsm_systemd_class_init (GsmSystemdClass *klass); +static void gsm_systemd_init (GsmSystemd *sd); +static void gsm_systemd_finalize (GObject *object); + +static void gsm_systemd_free_dbus (GsmSystemd *manager); + +static DBusHandlerResult gsm_systemd_dbus_filter (DBusConnection *connection, + DBusMessage *message, + void *user_data); + +static void gsm_systemd_on_name_owner_changed (DBusGProxy *bus_proxy, + const char *name, + const char *prev_owner, + const char *new_owner, + GsmSystemd *manager); + +G_DEFINE_TYPE (GsmSystemd, gsm_systemd, G_TYPE_OBJECT); + +static void +gsm_systemd_get_property (GObject *object, + guint prop_id, + GValue *value, + GParamSpec *pspec) +{ + GsmSystemd *manager = GSM_SYSTEMD (object); + + switch (prop_id) { + case PROP_IS_CONNECTED: + g_value_set_boolean (value, + manager->priv->is_connected); + break; + + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, + prop_id, + pspec); + } +} + +static void +gsm_systemd_class_init (GsmSystemdClass *manager_class) +{ + GObjectClass *object_class; + GParamSpec *param_spec; + + object_class = G_OBJECT_CLASS (manager_class); + + object_class->finalize = gsm_systemd_finalize; + object_class->get_property = gsm_systemd_get_property; + + param_spec = g_param_spec_boolean ("is-connected", + "Is connected", + "Whether the session is connected to Systemd", + FALSE, + G_PARAM_READABLE); + + g_object_class_install_property (object_class, PROP_IS_CONNECTED, + param_spec); + + signals [REQUEST_COMPLETED] = + g_signal_new ("request-completed", + G_OBJECT_CLASS_TYPE (object_class), + G_SIGNAL_RUN_LAST, + G_STRUCT_OFFSET (GsmSystemdClass, request_completed), + NULL, + NULL, + g_cclosure_marshal_VOID__POINTER, + G_TYPE_NONE, + 1, G_TYPE_POINTER); + + signals [PRIVILEGES_COMPLETED] = + g_signal_new ("privileges-completed", + G_OBJECT_CLASS_TYPE (object_class), + G_SIGNAL_RUN_LAST, + G_STRUCT_OFFSET (GsmSystemdClass, privileges_completed), + NULL, + NULL, + gsm_marshal_VOID__BOOLEAN_BOOLEAN_POINTER, + G_TYPE_NONE, + 3, G_TYPE_BOOLEAN, G_TYPE_BOOLEAN, G_TYPE_POINTER); + + g_type_class_add_private (manager_class, sizeof (GsmSystemdPrivate)); +} + +static DBusHandlerResult +gsm_systemd_dbus_filter (DBusConnection *connection, + DBusMessage *message, + void *user_data) +{ + GsmSystemd *manager; + + manager = GSM_SYSTEMD (user_data); + + if (dbus_message_is_signal (message, + DBUS_INTERFACE_LOCAL, "Disconnected") && + strcmp (dbus_message_get_path (message), DBUS_PATH_LOCAL) == 0) { + gsm_systemd_free_dbus (manager); + return DBUS_HANDLER_RESULT_HANDLED; + } + + return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; +} + +static gboolean +gsm_systemd_ensure_sd_connection (GsmSystemd *manager, + GError **error) +{ + GError *connection_error; + gboolean is_connected; + + connection_error = NULL; + + if (manager->priv->dbus_connection == NULL) { + DBusConnection *connection; + + manager->priv->dbus_connection = dbus_g_bus_get (DBUS_BUS_SYSTEM, + &connection_error); + + if (manager->priv->dbus_connection == NULL) { + g_propagate_error (error, connection_error); + is_connected = FALSE; + goto out; + } + + connection = dbus_g_connection_get_connection (manager->priv->dbus_connection); + dbus_connection_set_exit_on_disconnect (connection, FALSE); + dbus_connection_add_filter (connection, + gsm_systemd_dbus_filter, + manager, NULL); + } + + if (manager->priv->bus_proxy == NULL) { + manager->priv->bus_proxy = + dbus_g_proxy_new_for_name_owner (manager->priv->dbus_connection, + DBUS_SERVICE_DBUS, + DBUS_PATH_DBUS, + DBUS_INTERFACE_DBUS, + &connection_error); + + if (manager->priv->bus_proxy == NULL) { + g_propagate_error (error, connection_error); + is_connected = FALSE; + goto out; + } + + dbus_g_proxy_add_signal (manager->priv->bus_proxy, + "NameOwnerChanged", + G_TYPE_STRING, + G_TYPE_STRING, + G_TYPE_STRING, + G_TYPE_INVALID); + + dbus_g_proxy_connect_signal (manager->priv->bus_proxy, + "NameOwnerChanged", + G_CALLBACK (gsm_systemd_on_name_owner_changed), + manager, NULL); + } + + if (manager->priv->sd_proxy == NULL) { + manager->priv->sd_proxy = + dbus_g_proxy_new_for_name_owner (manager->priv->dbus_connection, + SD_NAME, + SD_PATH, + SD_INTERFACE, + &connection_error); + + if (manager->priv->sd_proxy == NULL) { + g_propagate_error (error, connection_error); + is_connected = FALSE; + goto out; + } + } + + is_connected = TRUE; + +out: + if (manager->priv->is_connected != is_connected) { + manager->priv->is_connected = is_connected; + g_object_notify (G_OBJECT (manager), "is-connected"); + } + + if (!is_connected) { + if (manager->priv->dbus_connection == NULL) { + if (manager->priv->bus_proxy != NULL) { + g_object_unref (manager->priv->bus_proxy); + manager->priv->bus_proxy = NULL; + } + + if (manager->priv->sd_proxy != NULL) { + g_object_unref (manager->priv->sd_proxy); + manager->priv->sd_proxy = NULL; + } + } else if (manager->priv->bus_proxy == NULL) { + if (manager->priv->sd_proxy != NULL) { + g_object_unref (manager->priv->sd_proxy); + manager->priv->sd_proxy = NULL; + } + } + } + + return is_connected; +} + +static void +gsm_systemd_on_name_owner_changed (DBusGProxy *bus_proxy, + const char *name, + const char *prev_owner, + const char *new_owner, + GsmSystemd *manager) +{ + if (name != NULL && g_strcmp0 (name, SD_NAME) != 0) { + return; + } + + if (manager->priv->sd_proxy != NULL) { + g_object_unref (manager->priv->sd_proxy); + manager->priv->sd_proxy = NULL; + } + + gsm_systemd_ensure_sd_connection (manager, NULL); +} + +static void +gsm_systemd_init (GsmSystemd *manager) +{ + GError *error; + + manager->priv = GSM_SYSTEMD_GET_PRIVATE (manager); + + error = NULL; + + if (!gsm_systemd_ensure_sd_connection (manager, &error)) { + g_warning ("Could not connect to Systemd: %s", + error->message); + g_error_free (error); + } +} + +static void +gsm_systemd_free_dbus (GsmSystemd *manager) +{ + if (manager->priv->bus_proxy != NULL) { + g_object_unref (manager->priv->bus_proxy); + manager->priv->bus_proxy = NULL; + } + + if (manager->priv->sd_proxy != NULL) { + g_object_unref (manager->priv->sd_proxy); + manager->priv->sd_proxy = NULL; + } + + if (manager->priv->dbus_connection != NULL) { + DBusConnection *connection; + connection = dbus_g_connection_get_connection (manager->priv->dbus_connection); + dbus_connection_remove_filter (connection, + gsm_systemd_dbus_filter, + manager); + + dbus_g_connection_unref (manager->priv->dbus_connection); + manager->priv->dbus_connection = NULL; + } +} + +static void +gsm_systemd_finalize (GObject *object) +{ + GsmSystemd *manager; + GObjectClass *parent_class; + + manager = GSM_SYSTEMD (object); + + parent_class = G_OBJECT_CLASS (gsm_systemd_parent_class); + + gsm_systemd_free_dbus (manager); + + if (parent_class->finalize != NULL) { + parent_class->finalize (object); + } +} + +GQuark +gsm_systemd_error_quark (void) +{ + static GQuark error_quark = 0; + + if (error_quark == 0) { + error_quark = g_quark_from_static_string ("gsm-systemd-error"); + } + + return error_quark; +} + +GsmSystemd * +gsm_systemd_new (void) +{ + GsmSystemd *manager; + + manager = g_object_new (GSM_TYPE_SYSTEMD, NULL); + + return manager; +} + +static void +emit_restart_complete (GsmSystemd *manager, + GError *error) +{ + GError *call_error; + + call_error = NULL; + + if (error != NULL) { + call_error = g_error_new_literal (GSM_SYSTEMD_ERROR, + GSM_SYSTEMD_ERROR_RESTARTING, + error->message); + } + + g_signal_emit (G_OBJECT (manager), + signals [REQUEST_COMPLETED], + 0, call_error); + + if (call_error != NULL) { + g_error_free (call_error); + } +} + +static void +emit_stop_complete (GsmSystemd *manager, + GError *error) +{ + GError *call_error; + + call_error = NULL; + + if (error != NULL) { + call_error = g_error_new_literal (GSM_SYSTEMD_ERROR, + GSM_SYSTEMD_ERROR_STOPPING, + error->message); + } + + g_signal_emit (G_OBJECT (manager), + signals [REQUEST_COMPLETED], + 0, call_error); + + if (call_error != NULL) { + g_error_free (call_error); + } +} + +void +gsm_systemd_attempt_restart (GsmSystemd *manager) +{ + gboolean res; + GError *error; + + error = NULL; + + if (!gsm_systemd_ensure_sd_connection (manager, &error)) { + g_warning ("Could not connect to Systemd: %s", + error->message); + emit_restart_complete (manager, error); + g_error_free (error); + return; + } + + res = dbus_g_proxy_call_with_timeout (manager->priv->sd_proxy, + "Reboot", + INT_MAX, + &error, + G_TYPE_BOOLEAN, TRUE, /* interactive */ + G_TYPE_INVALID, + G_TYPE_INVALID); + + if (!res) { + g_warning ("Unable to restart system: %s", error->message); + emit_restart_complete (manager, error); + g_error_free (error); + } else { + emit_restart_complete (manager, NULL); + } +} + +void +gsm_systemd_attempt_stop (GsmSystemd *manager) +{ + gboolean res; + GError *error; + + error = NULL; + + if (!gsm_systemd_ensure_sd_connection (manager, &error)) { + g_warning ("Could not connect to Systemd: %s", + error->message); + emit_stop_complete (manager, error); + g_error_free (error); + return; + } + + res = dbus_g_proxy_call_with_timeout (manager->priv->sd_proxy, + "PowerOff", + INT_MAX, + &error, + G_TYPE_BOOLEAN, TRUE, /* interactive */ + G_TYPE_INVALID, + G_TYPE_INVALID); + + if (!res) { + g_warning ("Unable to stop system: %s", error->message); + emit_stop_complete (manager, error); + g_error_free (error); + } else { + emit_stop_complete (manager, NULL); + } +} + +static void +gsm_systemd_get_session_path (DBusConnection *connection, + char **session_path) +{ + DBusError local_error; + DBusMessage *message; + DBusMessage *reply; + DBusMessageIter iter; + gchar *session_id = NULL; + +#ifdef HAVE_SYSTEMD + sd_pid_get_session (getpid (), &session_id); +#endif + + if (session_id == NULL) + return; + + reply = NULL; + + dbus_error_init (&local_error); + message = dbus_message_new_method_call (SD_NAME, + SD_PATH, + SD_INTERFACE, + "GetSession"); + if (message == NULL) { + goto out; + } + + dbus_message_iter_init_append (message, &iter); + dbus_message_iter_append_basic (&iter, DBUS_TYPE_STRING, &session_id); + + dbus_error_init (&local_error); + reply = dbus_connection_send_with_reply_and_block (connection, + message, + -1, + &local_error); + if (reply == NULL) { + if (dbus_error_is_set (&local_error)) { + g_warning ("Unable to get session path: %s", local_error.message); + dbus_error_free (&local_error); + goto out; + } + } + + dbus_message_iter_init (reply, &iter); + dbus_message_iter_get_basic (&iter, session_path); + +out: + if (message != NULL) { + dbus_message_unref (message); + } + if (reply != NULL) { + dbus_message_unref (reply); + } + if (session_id != NULL) { + g_free (session_id); + } +} + + +void +gsm_systemd_set_session_idle (GsmSystemd *manager, + gboolean is_idle) +{ + GError *error; + char *session_path; + DBusMessage *message; + DBusMessage *reply; + DBusError dbus_error; + DBusMessageIter iter; + + error = NULL; + + if (!gsm_systemd_ensure_sd_connection (manager, &error)) { + g_warning ("Could not connect to Systemd: %s", + error->message); + g_error_free (error); + return; + } + + gsm_systemd_get_session_path (dbus_g_connection_get_connection (manager->priv->dbus_connection), &session_path); + + g_debug ("Updating Systemd idle status: %d", is_idle); + message = dbus_message_new_method_call (SD_NAME, + session_path, + SD_SESSION_INTERFACE, + "SetIdleHint"); + if (message == NULL) { + g_debug ("Couldn't allocate the D-Bus message"); + return; + } + + dbus_message_iter_init_append (message, &iter); + dbus_message_iter_append_basic (&iter, DBUS_TYPE_BOOLEAN, &is_idle); + + /* FIXME: use async? */ + dbus_error_init (&dbus_error); + reply = dbus_connection_send_with_reply_and_block (dbus_g_connection_get_connection (manager->priv->dbus_connection), + message, + -1, + &dbus_error); + dbus_message_unref (message); + + if (reply != NULL) { + dbus_message_unref (reply); + } + + if (dbus_error_is_set (&dbus_error)) { + g_debug ("%s raised:\n %s\n\n", dbus_error.name, dbus_error.message); + dbus_error_free (&dbus_error); + } + + g_free (session_path); +} + +gboolean +gsm_systemd_can_switch_user (GsmSystemd *manager) +{ + GError *error; + char *session_id = NULL; + char *seat_id = NULL; + int ret = 0; + + error = NULL; + + if (!gsm_systemd_ensure_sd_connection (manager, &error)) { + g_warning ("Could not connect to Systemd: %s", + error->message); + g_error_free (error); + return FALSE; + } + +#ifdef HAVE_SYSTEMD + sd_pid_get_session (getpid (), &session_id); +#endif + + if (session_id == NULL) + return FALSE; + +#ifdef HAVE_SYSTEMD + sd_session_get_seat (session_id, &seat_id); + ret = sd_seat_can_multi_session (seat_id); + + g_free (session_id); + g_free (seat_id); +#endif + + return ret > 0; +} + +gboolean +gsm_systemd_get_restart_privileges (GsmSystemd *manager) +{ + g_signal_emit (G_OBJECT (manager), + signals [PRIVILEGES_COMPLETED], + 0, TRUE, TRUE, NULL); + + return TRUE; +} + +gboolean +gsm_systemd_get_stop_privileges (GsmSystemd *manager) +{ + g_signal_emit (G_OBJECT (manager), + signals [PRIVILEGES_COMPLETED], + 0, TRUE, TRUE, NULL); + + return TRUE; +} + +gboolean +gsm_systemd_can_restart (GsmSystemd *manager) +{ + gboolean res; + gchar *value; + gboolean can_restart; + GError *error; + + error = NULL; + + if (!gsm_systemd_ensure_sd_connection (manager, &error)) { + g_warning ("Could not connect to Systemd: %s", + error->message); + g_error_free (error); + return FALSE; + } + + res = dbus_g_proxy_call_with_timeout (manager->priv->sd_proxy, + "CanReboot", + INT_MAX, + &error, + G_TYPE_INVALID, + G_TYPE_STRING, &value, + G_TYPE_INVALID); + if (res == FALSE) { + g_warning ("Could not make DBUS call: %s", + error->message); + g_error_free (error); + return FALSE; + } + + can_restart = g_strcmp0 (value, "yes") == 0 || + g_strcmp0 (value, "challenge") == 0; + g_free (value); + return can_restart; +} + +gboolean +gsm_systemd_can_stop (GsmSystemd *manager) +{ + gboolean res; + gchar *value; + gboolean can_stop; + GError *error; + + error = NULL; + + if (!gsm_systemd_ensure_sd_connection (manager, &error)) { + g_warning ("Could not connect to Systemd: %s", + error->message); + g_error_free (error); + return FALSE; + } + + res = dbus_g_proxy_call_with_timeout (manager->priv->sd_proxy, + "CanPowerOff", + INT_MAX, + &error, + G_TYPE_INVALID, + G_TYPE_STRING, &value, + G_TYPE_INVALID); + + if (res == FALSE) { + g_warning ("Could not make DBUS call: %s", + error->message); + g_error_free (error); + return FALSE; + } + + can_stop = g_strcmp0 (value, "yes") == 0 || + g_strcmp0 (value, "challenge") == 0; + g_free (value); + return can_stop; +} + +gchar * +gsm_systemd_get_current_session_type (GsmSystemd *manager) +{ + GError *gerror; + int session_id; + gchar *session_class = NULL; + int res; + + gerror = NULL; + + if (!gsm_systemd_ensure_sd_connection (manager, &gerror)) { + g_warning ("Could not connect to Systemd: %s", + gerror->message); + g_error_free (gerror); + return NULL; + } + +#ifdef HAVE_SYSTEMD + sd_pid_get_session (getpid (), &session_id); +#endif + + if (session_id == NULL) + return NULL; + +#ifdef HAVE_SYSTEMD + res = sd_session_get_class (session_id, &session_class); + if (res < 0) { + g_warning ("Could not get Systemd session class!"); + return NULL; + } +#endif + + return session_class; +} + + +GsmSystemd * +gsm_get_systemd (void) +{ + static GsmSystemd *manager = NULL; + + if (manager == NULL) { + manager = gsm_systemd_new (); + } + + return g_object_ref (manager); +} |