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-rw-r--r--src/slack-timedate.cpp274
1 files changed, 274 insertions, 0 deletions
diff --git a/src/slack-timedate.cpp b/src/slack-timedate.cpp
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+++ b/src/slack-timedate.cpp
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+/*
+ * Copyright (C) 2013-2024 Eugen Wissner <belka@caraus.de>
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <cstring>
+#include <filesystem>
+#include <fstream>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/time.h>
+#include <sys/stat.h>
+
+#include "slack-timedate.h"
+
+static void slack_method_call (GDBusConnection *connection, const gchar *sender, const gchar *object_path, const gchar *interface_name, const gchar *method_name, GVariant *parameters, GDBusMethodInvocation *invocation, gpointer user_data) {
+ gchar *timezone, *response;
+ gboolean user_interaction, relative, is_localtime, use_ntp;
+ gint64 usec_utc;
+
+ // Set time zone
+ if (g_strcmp0 (method_name, "SetTimezone") == 0) {
+ g_variant_get (parameters, "(&sb)", &timezone, &user_interaction);
+
+ if (slack_set_timezone (timezone)) g_dbus_method_invocation_return_value (invocation,
+ NULL);
+ else g_dbus_method_invocation_return_error (invocation,
+ G_IO_ERROR,
+ G_IO_ERROR_FAILED,
+ "Write operation failed");
+
+ g_free (timezone);
+ } else if (g_strcmp0 (method_name, "SetTime") == 0) {
+ g_variant_get (parameters, "(xbb)", &usec_utc, &relative, &user_interaction);
+
+ // Set time
+ //if (!slack_set_time (usec_utc, slack_get_is_localtime ())) {
+ if (slack_set_time(usec_utc, relative))
+ {
+ g_dbus_method_invocation_return_value(invocation, NULL);
+ }
+ else
+ {
+ g_dbus_method_invocation_return_error(invocation, G_IO_ERROR, G_IO_ERROR_FAILED,
+ "Failed to set system clock");
+ }
+ } else if (g_strcmp0 (method_name, "SetNTP") == 0) {
+ g_variant_get (parameters, "(bb)", &use_ntp, &user_interaction);
+
+ // Enable NTP
+ if (slack_set_ntp (use_ntp)) g_dbus_method_invocation_return_value (invocation,
+ NULL);
+ else g_dbus_method_invocation_return_error (invocation,
+ G_IO_ERROR,
+ G_IO_ERROR_FAILED,
+ "Error enabling NTP");
+ }
+ return;
+}
+
+static GVariant *slack_get_property (GDBusConnection *connection, const gchar *sender, const gchar *object_path, const gchar *interface_name, const gchar *prop_name, GError **slack_err, gpointer user_data) {
+ if (g_strcmp0 ("Timezone", prop_name) == 0) {
+ return g_variant_new_string (slack_get_timezone ());
+ } if (g_strcmp0 ("LocalRTC", prop_name) == 0) {
+ return g_variant_new_boolean (slack_get_is_localtime ());
+ } if (g_strcmp0 ("NTP", prop_name) == 0) {
+ return g_variant_new_boolean (slack_get_ntp ());
+ }
+ return NULL;
+}
+
+static void on_timedate_acquired (GDBusConnection *connection, const gchar *name, gpointer user_data) {
+ guint registration_id;
+ GDBusNodeInfo *introspection_data;
+ GError *slack_err;
+ const GDBusInterfaceVTable interface_vtable = {
+ slack_method_call,
+ slack_get_property,
+ NULL
+ };
+
+ slack_err = NULL;
+ introspection_data = g_dbus_node_info_new_for_xml (INTROSPECTION_XML, &slack_err);
+ if (introspection_data == NULL)
+ g_error ("Failed to parse D-Bus introspection XML: %s\n", slack_err->message);
+
+ slack_err = NULL;
+ registration_id = g_dbus_connection_register_object (connection,
+ BUS_PATH,
+ introspection_data->interfaces[0],
+ &interface_vtable,
+ NULL,
+ NULL,
+ &slack_err);
+
+ if (registration_id <= 0) {
+ g_critical ("Failed to register callbacks for the exported object with the D-Bus interface: %s\n", slack_err->message);
+ g_error_free (slack_err);
+ }
+
+ g_dbus_node_info_unref (introspection_data);
+}
+
+static void on_timedate_lost (GDBusConnection *connection, const gchar *name, gpointer user_data) {
+ g_warning ("Failed to acquire the service %s.\n", name);
+ exit (1);
+}
+
+gboolean timeout_callback (Glib::RefPtr<Glib::MainLoop> loop2quit) {
+ loop2quit->quit();
+ return false;
+}
+
+int main(int argc, char **argv)
+{
+ guint owner_id = g_bus_own_name (G_BUS_TYPE_SYSTEM,
+ BUS_NAME,
+ static_cast<GBusNameOwnerFlags>(G_BUS_NAME_OWNER_FLAGS_ALLOW_REPLACEMENT | G_BUS_NAME_OWNER_FLAGS_REPLACE),
+ on_timedate_acquired,
+ NULL,
+ on_timedate_lost,
+ NULL,
+ NULL);
+ Glib::RefPtr<Glib::MainLoop> loop = Glib::MainLoop::create(false);
+
+ Glib::signal_timeout().connect_seconds(sigc::bind(&timeout_callback, loop), DEFAULT_EXIT_SEC);
+ loop->run();
+
+ g_bus_unown_name (owner_id);
+
+ return EXIT_SUCCESS;
+}
+
+
+gchar *slack_get_timezone () {
+ gchar *zone_copied_from, *zone;
+
+ zone_copied_from = g_file_read_link ("/etc/localtime-copied-from", NULL);
+ if (zone_copied_from == NULL) return NULL;
+
+ zone = g_strdup (zone_copied_from + strlen ("/usr/share/zoneinfo/") * sizeof (gchar));
+ g_free (zone_copied_from);
+
+ return zone;
+}
+
+gboolean slack_set_timezone (gchar *zone) {
+ gchar *zone_file;
+ GFile *etc_localtime, *localtime_link, *g_zone_file;
+
+ zone_file = g_strconcat ("/usr/share/zoneinfo/", zone, NULL);
+ if (Glib::file_test(zone_file, Glib::FILE_TEST_IS_REGULAR))
+ {
+ etc_localtime = g_file_new_for_path ("/etc/localtime");
+ localtime_link = g_file_new_for_path ("/etc/localtime-copied-from");
+ g_zone_file = g_file_new_for_path (zone_file);
+
+ if (!g_file_copy (g_zone_file, etc_localtime, G_FILE_COPY_OVERWRITE, NULL, NULL, NULL, NULL)) {
+ return FALSE;
+ }
+
+ if (!g_file_delete (localtime_link, NULL, NULL)) {
+ return FALSE;
+ }
+ if (!g_file_make_symbolic_link (localtime_link, zone_file, NULL, NULL)) {
+ return FALSE;
+ }
+
+ g_free (zone_file);
+ g_object_unref (etc_localtime);
+ g_object_unref (localtime_link);
+ g_object_unref (g_zone_file);
+
+ return true;
+ }
+ return false;
+}
+
+gboolean slack_set_time(gint64 seconds_since_epoch, gboolean relative)
+{
+ timespec ts;
+
+ if (relative)
+ {
+ if (clock_gettime(CLOCK_REALTIME, &ts) == -1)
+ {
+ return FALSE;
+ }
+ ts.tv_sec += static_cast<time_t>(seconds_since_epoch / USEC_PER_SEC);
+ ts.tv_nsec += (seconds_since_epoch % USEC_PER_SEC) * NSEC_PER_USEC;
+
+ if (ts.tv_nsec < 0)
+ {
+ --ts.tv_sec;
+ ts.tv_nsec += USEC_PER_SEC;
+ }
+ }
+ else
+ {
+ ts.tv_sec = static_cast<time_t>(seconds_since_epoch / USEC_PER_SEC);
+ ts.tv_nsec = (seconds_since_epoch % USEC_PER_SEC) * NSEC_PER_USEC;
+ }
+ return clock_settime (CLOCK_REALTIME, &ts) == 0;
+}
+
+gboolean slack_get_is_localtime()
+{
+ std::ifstream fh{ "/etc/hardwareclock", std::ios::in };
+ if (!fh.is_open())
+ {
+ return false;
+ }
+ std::array<char, 10> time_str; // "localtime" is longer than "UTC" and has 9 letters + \0
+
+ while (fh.good())
+ {
+ fh.getline(time_str.data(), time_str.size());
+ fh.clear(fh.rdstate() & (~std::ios_base::failbit));
+
+ if (std::strncmp(time_str.data(), "localtime", time_str.size()) == 0)
+ {
+ return true;
+ }
+ }
+ return false;
+}
+
+gboolean slack_get_ntp()
+{
+ return Glib::file_test("/etc/rc.d/rc.ntpd", Glib::FileTest::FILE_TEST_IS_EXECUTABLE);
+}
+
+gboolean slack_set_ntp(gboolean xntp)
+{
+ std::filesystem::perms rc_mode = std::filesystem::perms::owner_read | std::filesystem::perms::owner_write
+ | std::filesystem::perms::group_read | std::filesystem::perms::others_read;
+
+ if (xntp)
+ {
+ rc_mode |= std::filesystem::perms::owner_exec
+ | std::filesystem::perms::group_exec | std::filesystem::perms::others_exec;
+ g_message("Please don't forget to configure the NTP daemon");
+
+ /* It doesn't matter if fails.
+ * The ntpdate command is considered obsolete, but "orthodox" ntpd -g
+ * will fail if your system clock is off for more than half an hour. */
+ g_spawn_command_line_async("/usr/sbin/ntpdate pool.ntp.org", NULL);
+ }
+ if (Glib::file_test("/etc/rc.d/rc.ntpd", Glib::FileTest::FILE_TEST_IS_REGULAR))
+ {
+ std::error_code ec;
+ std::filesystem::permissions("/etc/rc.d/rc.ntpd", rc_mode, ec);
+ return !ec;
+ }
+ else
+ {
+ g_error("The NTP daemon isn't installed");
+ return false;
+ }
+}
generated by cgit v1.2.3 (git 2.26.2) at 2026-06-26 21:40:01 +0000