/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- * * Copyright (C) 2007 David Zeuthen * * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include "system-timezone.h" #include "msd-datetime-mechanism.h" #include "msd-datetime-mechanism-glue.h" static gboolean do_exit (gpointer user_data) { g_debug ("Exiting due to inactivity"); exit (1); return FALSE; } static void reset_killtimer (void) { static guint timer_id = 0; if (timer_id > 0) { g_source_remove (timer_id); } g_debug ("Setting killtimer to 30 seconds..."); timer_id = g_timeout_add_seconds (30, do_exit, NULL); } struct MsdDatetimeMechanismPrivate { DBusGConnection *system_bus_connection; DBusGProxy *system_bus_proxy; PolkitAuthority *auth; }; static void msd_datetime_mechanism_finalize (GObject *object); G_DEFINE_TYPE (MsdDatetimeMechanism, msd_datetime_mechanism, G_TYPE_OBJECT) #define MSD_DATETIME_MECHANISM_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), MSD_DATETIME_TYPE_MECHANISM, MsdDatetimeMechanismPrivate)) GQuark msd_datetime_mechanism_error_quark (void) { static GQuark ret = 0; if (ret == 0) { ret = g_quark_from_static_string ("msd_datetime_mechanism_error"); } return ret; } #define ENUM_ENTRY(NAME, DESC) { NAME, "" #NAME "", DESC } GType msd_datetime_mechanism_error_get_type (void) { static GType etype = 0; if (etype == 0) { static const GEnumValue values[] = { ENUM_ENTRY (MSD_DATETIME_MECHANISM_ERROR_GENERAL, "GeneralError"), ENUM_ENTRY (MSD_DATETIME_MECHANISM_ERROR_NOT_PRIVILEGED, "NotPrivileged"), ENUM_ENTRY (MSD_DATETIME_MECHANISM_ERROR_INVALID_TIMEZONE_FILE, "InvalidTimezoneFile"), { 0, 0, 0 } }; g_assert (MSD_DATETIME_MECHANISM_NUM_ERRORS == G_N_ELEMENTS (values) - 1); etype = g_enum_register_static ("MsdDatetimeMechanismError", values); } return etype; } static GObject * msd_datetime_mechanism_constructor (GType type, guint n_construct_properties, GObjectConstructParam *construct_properties) { MsdDatetimeMechanism *mechanism; mechanism = MSD_DATETIME_MECHANISM (G_OBJECT_CLASS (msd_datetime_mechanism_parent_class)->constructor ( type, n_construct_properties, construct_properties)); return G_OBJECT (mechanism); } static void msd_datetime_mechanism_class_init (MsdDatetimeMechanismClass *klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); object_class->constructor = msd_datetime_mechanism_constructor; object_class->finalize = msd_datetime_mechanism_finalize; g_type_class_add_private (klass, sizeof (MsdDatetimeMechanismPrivate)); dbus_g_object_type_install_info (MSD_DATETIME_TYPE_MECHANISM, &dbus_glib_msd_datetime_mechanism_object_info); dbus_g_error_domain_register (MSD_DATETIME_MECHANISM_ERROR, NULL, MSD_DATETIME_MECHANISM_TYPE_ERROR); } static void msd_datetime_mechanism_init (MsdDatetimeMechanism *mechanism) { mechanism->priv = MSD_DATETIME_MECHANISM_GET_PRIVATE (mechanism); } static void msd_datetime_mechanism_finalize (GObject *object) { MsdDatetimeMechanism *mechanism; g_return_if_fail (object != NULL); g_return_if_fail (MSD_DATETIME_IS_MECHANISM (object)); mechanism = MSD_DATETIME_MECHANISM (object); g_return_if_fail (mechanism->priv != NULL); g_object_unref (mechanism->priv->system_bus_proxy); G_OBJECT_CLASS (msd_datetime_mechanism_parent_class)->finalize (object); } static gboolean register_mechanism (MsdDatetimeMechanism *mechanism) { GError *error = NULL; mechanism->priv->auth = polkit_authority_get (); error = NULL; mechanism->priv->system_bus_connection = dbus_g_bus_get (DBUS_BUS_SYSTEM, &error); if (mechanism->priv->system_bus_connection == NULL) { if (error != NULL) { g_critical ("error getting system bus: %s", error->message); g_error_free (error); } goto error; } dbus_g_connection_register_g_object (mechanism->priv->system_bus_connection, "/", G_OBJECT (mechanism)); mechanism->priv->system_bus_proxy = dbus_g_proxy_new_for_name (mechanism->priv->system_bus_connection, DBUS_SERVICE_DBUS, DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS); reset_killtimer (); return TRUE; error: return FALSE; } MsdDatetimeMechanism * msd_datetime_mechanism_new (void) { GObject *object; gboolean res; object = g_object_new (MSD_DATETIME_TYPE_MECHANISM, NULL); res = register_mechanism (MSD_DATETIME_MECHANISM (object)); if (! res) { g_object_unref (object); return NULL; } return MSD_DATETIME_MECHANISM (object); } static gboolean _check_polkit_for_action (MsdDatetimeMechanism *mechanism, DBusGMethodInvocation *context, const char *action) { const char *sender; GError *error; PolkitSubject *subject; PolkitAuthorizationResult *result; error = NULL; /* Check that caller is privileged */ sender = dbus_g_method_get_sender (context); subject = polkit_system_bus_name_new (sender); result = polkit_authority_check_authorization_sync (mechanism->priv->auth, subject, action, NULL, POLKIT_CHECK_AUTHORIZATION_FLAGS_ALLOW_USER_INTERACTION, NULL, &error); g_object_unref (subject); if (error) { dbus_g_method_return_error (context, error); g_error_free (error); return FALSE; } if (!polkit_authorization_result_get_is_authorized (result)) { error = g_error_new (MSD_DATETIME_MECHANISM_ERROR, MSD_DATETIME_MECHANISM_ERROR_NOT_PRIVILEGED, "Not Authorized for action %s", action); dbus_g_method_return_error (context, error); g_error_free (error); g_object_unref (result); return FALSE; } g_object_unref (result); return TRUE; } static gboolean _set_time (MsdDatetimeMechanism *mechanism, const struct timeval *tv, DBusGMethodInvocation *context) { GError *error; if (!_check_polkit_for_action (mechanism, context, "org.mate.settingsdaemon.datetimemechanism.settime")) return FALSE; if (settimeofday (tv, NULL) != 0) { error = g_error_new (MSD_DATETIME_MECHANISM_ERROR, MSD_DATETIME_MECHANISM_ERROR_GENERAL, "Error calling settimeofday({%lld,%lld}): %s", (gint64) tv->tv_sec, (gint64) tv->tv_usec, strerror (errno)); dbus_g_method_return_error (context, error); g_error_free (error); return FALSE; } if (g_file_test ("/sbin/hwclock", G_FILE_TEST_EXISTS | G_FILE_TEST_IS_REGULAR | G_FILE_TEST_IS_EXECUTABLE)) { int exit_status; if (!g_spawn_command_line_sync ("/sbin/hwclock --systohc", NULL, NULL, &exit_status, &error)) { GError *error2; error2 = g_error_new (MSD_DATETIME_MECHANISM_ERROR, MSD_DATETIME_MECHANISM_ERROR_GENERAL, "Error spawning /sbin/hwclock: %s", error->message); g_error_free (error); dbus_g_method_return_error (context, error2); g_error_free (error2); return FALSE; } if (WEXITSTATUS (exit_status) != 0) { error = g_error_new (MSD_DATETIME_MECHANISM_ERROR, MSD_DATETIME_MECHANISM_ERROR_GENERAL, "/sbin/hwclock returned %d", exit_status); dbus_g_method_return_error (context, error); g_error_free (error); return FALSE; } } dbus_g_method_return (context); return TRUE; } static gboolean _rh_update_etc_sysconfig_clock (DBusGMethodInvocation *context, const char *key, const char *value) { /* On Red Hat / Fedora, the /etc/sysconfig/clock file needs to be kept in sync */ if (g_file_test ("/etc/sysconfig/clock", G_FILE_TEST_EXISTS | G_FILE_TEST_IS_REGULAR)) { char **lines; int n; gboolean replaced; char *data; gsize len; GError *error; error = NULL; if (!g_file_get_contents ("/etc/sysconfig/clock", &data, &len, &error)) { GError *error2; error2 = g_error_new (MSD_DATETIME_MECHANISM_ERROR, MSD_DATETIME_MECHANISM_ERROR_GENERAL, "Error reading /etc/sysconfig/clock file: %s", error->message); g_error_free (error); dbus_g_method_return_error (context, error2); g_error_free (error2); return FALSE; } replaced = FALSE; lines = g_strsplit (data, "\n", 0); g_free (data); for (n = 0; lines[n] != NULL; n++) { if (g_str_has_prefix (lines[n], key)) { g_free (lines[n]); lines[n] = g_strdup_printf ("%s%s", key, value); replaced = TRUE; } } if (replaced) { GString *str; str = g_string_new (NULL); for (n = 0; lines[n] != NULL; n++) { g_string_append (str, lines[n]); if (lines[n + 1] != NULL) g_string_append_c (str, '\n'); } data = g_string_free (str, FALSE); len = strlen (data); if (!g_file_set_contents ("/etc/sysconfig/clock", data, len, &error)) { GError *error2; error2 = g_error_new (MSD_DATETIME_MECHANISM_ERROR, MSD_DATETIME_MECHANISM_ERROR_GENERAL, "Error updating /etc/sysconfig/clock: %s", error->message); g_error_free (error); dbus_g_method_return_error (context, error2); g_error_free (error2); g_free (data); return FALSE; } g_free (data); } g_strfreev (lines); } return TRUE; } /* exported methods */ gboolean msd_datetime_mechanism_set_time (MsdDatetimeMechanism *mechanism, gint64 seconds_since_epoch, DBusGMethodInvocation *context) { struct timeval tv; reset_killtimer (); g_debug ("SetTime(%lld) called", seconds_since_epoch); tv.tv_sec = (time_t) seconds_since_epoch; tv.tv_usec = 0; return _set_time (mechanism, &tv, context); } gboolean msd_datetime_mechanism_adjust_time (MsdDatetimeMechanism *mechanism, gint64 seconds_to_add, DBusGMethodInvocation *context) { struct timeval tv; reset_killtimer (); g_debug ("AdjustTime(%lld) called", seconds_to_add); if (gettimeofday (&tv, NULL) != 0) { GError *error; error = g_error_new (MSD_DATETIME_MECHANISM_ERROR, MSD_DATETIME_MECHANISM_ERROR_GENERAL, "Error calling gettimeofday(): %s", strerror (errno)); dbus_g_method_return_error (context, error); g_error_free (error); return FALSE; } tv.tv_sec += (time_t) seconds_to_add; return _set_time (mechanism, &tv, context); } gboolean msd_datetime_mechanism_set_timezone (MsdDatetimeMechanism *mechanism, const char *zone_file, DBusGMethodInvocation *context) { GError *error; reset_killtimer (); g_debug ("SetTimezone('%s') called", zone_file); if (!_check_polkit_for_action (mechanism, context, "org.mate.settingsdaemon.datetimemechanism.settimezone")) return FALSE; error = NULL; if (!system_timezone_set_from_file (zone_file, &error)) { GError *error2; int code; if (error->code == SYSTEM_TIMEZONE_ERROR_INVALID_TIMEZONE_FILE) code = MSD_DATETIME_MECHANISM_ERROR_INVALID_TIMEZONE_FILE; else code = MSD_DATETIME_MECHANISM_ERROR_GENERAL; error2 = g_error_new (MSD_DATETIME_MECHANISM_ERROR, code, "%s", error->message); g_error_free (error); dbus_g_method_return_error (context, error2); g_error_free (error2); return FALSE; } dbus_g_method_return (context); return TRUE; } gboolean msd_datetime_mechanism_get_timezone (MsdDatetimeMechanism *mechism, DBusGMethodInvocation *context) { gchar *timezone; reset_killtimer (); timezone = system_timezone_find (); dbus_g_method_return (context, timezone); return TRUE; } gboolean msd_datetime_mechanism_get_hardware_clock_using_utc (MsdDatetimeMechanism *mechanism, DBusGMethodInvocation *context) { char **lines; char *data; gsize len; GError *error; gboolean is_utc; error = NULL; if (!g_file_get_contents ("/etc/adjtime", &data, &len, &error)) { GError *error2; error2 = g_error_new (MSD_DATETIME_MECHANISM_ERROR, MSD_DATETIME_MECHANISM_ERROR_GENERAL, "Error reading /etc/adjtime file: %s", error->message); g_error_free (error); dbus_g_method_return_error (context, error2); g_error_free (error2); return FALSE; } lines = g_strsplit (data, "\n", 0); g_free (data); if (g_strv_length (lines) < 3) { error = g_error_new (MSD_DATETIME_MECHANISM_ERROR, MSD_DATETIME_MECHANISM_ERROR_GENERAL, "Cannot parse /etc/adjtime"); dbus_g_method_return_error (context, error); g_error_free (error); g_strfreev (lines); return FALSE; } if (strcmp (lines[2], "UTC") == 0) { is_utc = TRUE; } else if (strcmp (lines[2], "LOCAL") == 0) { is_utc = FALSE; } else { error = g_error_new (MSD_DATETIME_MECHANISM_ERROR, MSD_DATETIME_MECHANISM_ERROR_GENERAL, "Expected UTC or LOCAL at line 3 of /etc/adjtime; found '%s'", lines[2]); dbus_g_method_return_error (context, error); g_error_free (error); g_strfreev (lines); return FALSE; } g_strfreev (lines); dbus_g_method_return (context, is_utc); return TRUE; } gboolean msd_datetime_mechanism_set_hardware_clock_using_utc (MsdDatetimeMechanism *mechanism, gboolean using_utc, DBusGMethodInvocation *context) { GError *error; error = NULL; if (!_check_polkit_for_action (mechanism, context, "org.mate.settingsdaemon.datetimemechanism.configurehwclock")) return FALSE; if (g_file_test ("/sbin/hwclock", G_FILE_TEST_EXISTS | G_FILE_TEST_IS_REGULAR | G_FILE_TEST_IS_EXECUTABLE)) { int exit_status; char *cmd; cmd = g_strdup_printf ("/sbin/hwclock %s --systohc", using_utc ? "--utc" : "--localtime"); if (!g_spawn_command_line_sync (cmd, NULL, NULL, &exit_status, &error)) { GError *error2; error2 = g_error_new (MSD_DATETIME_MECHANISM_ERROR, MSD_DATETIME_MECHANISM_ERROR_GENERAL, "Error spawning /sbin/hwclock: %s", error->message); g_error_free (error); dbus_g_method_return_error (context, error2); g_error_free (error2); g_free (cmd); return FALSE; } g_free (cmd); if (WEXITSTATUS (exit_status) != 0) { error = g_error_new (MSD_DATETIME_MECHANISM_ERROR, MSD_DATETIME_MECHANISM_ERROR_GENERAL, "/sbin/hwclock returned %d", exit_status); dbus_g_method_return_error (context, error); g_error_free (error); return FALSE; } if (!_rh_update_etc_sysconfig_clock (context, "UTC=", using_utc ? "true" : "false")) return FALSE; } dbus_g_method_return (context); return TRUE; } static void check_can_do (MsdDatetimeMechanism *mechanism, const char *action, DBusGMethodInvocation *context) { const char *sender; PolkitSubject *subject; PolkitAuthorizationResult *result; GError *error; /* Check that caller is privileged */ sender = dbus_g_method_get_sender (context); subject = polkit_system_bus_name_new (sender); error = NULL; result = polkit_authority_check_authorization_sync (mechanism->priv->auth, subject, action, NULL, 0, NULL, &error); g_object_unref (subject); if (error) { dbus_g_method_return_error (context, error); g_error_free (error); return; } if (polkit_authorization_result_get_is_authorized (result)) { dbus_g_method_return (context, 2); } else if (polkit_authorization_result_get_is_challenge (result)) { dbus_g_method_return (context, 1); } else { dbus_g_method_return (context, 0); } g_object_unref (result); } gboolean msd_datetime_mechanism_can_set_time (MsdDatetimeMechanism *mechanism, DBusGMethodInvocation *context) { check_can_do (mechanism, "org.mate.settingsdaemon.datetimemechanism.settime", context); return TRUE; } gboolean msd_datetime_mechanism_can_set_timezone (MsdDatetimeMechanism *mechanism, DBusGMethodInvocation *context) { check_can_do (mechanism, "org.mate.settingsdaemon.datetimemechanism.settimezone", context); return TRUE; }