Split the data and sources

2024-05-21 18:58:15 +02:00
parent 81232f6104
commit 0eccfe3ef3
11 changed files with 30 additions and 36 deletions
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@ -0,0 +1,10 @@
+find_package(PkgConfig)
+pkg_check_modules(GDBUS REQUIRED gio-2.0 dbus-1 glibmm-2.4)
+
+add_executable(slack-timedate
+	slack-timedate.cpp slack-timedate.h
+)
+target_include_directories(slack-timedate PRIVATE ${GDBUS_INCLUDE_DIRS})
+target_link_libraries(slack-timedate ${GDBUS_LIBRARIES})
+
+install(TARGETS slack-timedate DESTINATION ${CMAKE_INSTALL_LIBEXECDIR})
--- a/src/slack-timedate.cpp
+++ b/src/slack-timedate.cpp
@ -0,0 +1,274 @@
+/*
+ * 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;
+    }
+}
--- a/src/slack-timedate.h
+++ b/src/slack-timedate.h
@ -0,0 +1,78 @@
+/*
+ * 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 <dbus/dbus.h>
+#include <glibmm.h>
+#include <gio/gio.h>
+
+#define BUS_NAME "org.freedesktop.timedate1"
+#define BUS_PATH "/org/freedesktop/timedate1"
+#define BUS_INTERFACE "org.freedesktop.timedate1"
+
+#define INTROSPECTION_XML DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE \
+	"<node>\n" \
+	" <interface name=\"org.freedesktop.timedate1\">\n"             \
+	"  <property name=\"Timezone\" type=\"s\" access=\"read\"/>\n"  \
+	"  <property name=\"LocalRTC\" type=\"b\" access=\"read\"/>\n"  \
+	"  <property name=\"NTP\" type=\"b\" access=\"read\"/>\n"       \
+	"  <method name=\"SetTime\">\n"                                 \
+	"   <arg name=\"usec_utc\" type=\"x\" direction=\"in\"/>\n"     \
+	"   <arg name=\"relative\" type=\"b\" direction=\"in\"/>\n"     \
+	"   <arg name=\"user_interaction\" type=\"b\" direction=\"in\"/>\n" \
+	"  </method>\n"                                                 \
+	"  <method name=\"SetTimezone\">\n"                             \
+	"   <arg name=\"timezone\" type=\"s\" direction=\"in\"/>\n"     \
+	"   <arg name=\"user_interaction\" type=\"b\" direction=\"in\"/>\n" \
+	"  </method>\n"                                                 \
+	"  <method name=\"SetLocalRTC\">\n"                             \
+	"   <arg name=\"local_rtc\" type=\"b\" direction=\"in\"/>\n"    \
+	"   <arg name=\"fix_system\" type=\"b\" direction=\"in\"/>\n"   \
+	"   <arg name=\"user_interaction\" type=\"b\" direction=\"in\"/>\n" \
+	"  </method>\n"                                                 \
+	"  <method name=\"SetNTP\">\n"                                  \
+	"   <arg name=\"use_ntp\" type=\"b\" direction=\"in\"/>\n"      \
+	"   <arg name=\"user_interaction\" type=\"b\" direction=\"in\"/>\n" \
+	"  </method>\n"                                                 \
+	" </interface>\n"												\
+	"</node>\n"
+
+#define DEFAULT_EXIT_SEC 300
+
+constexpr gint32 USEC_PER_SEC = 1000000ULL;
+constexpr gint32 NSEC_PER_USEC = 1000ULL;
+
+// Returns the system time zone
+gchar *slack_get_timezone ();
+
+// Sets the system time zone to the one passed by the argument
+// Returns true on success, false otherwise
+gboolean slack_set_timezone (gchar *);
+
+// Changes the date/time
+// Takes the amount of seconds since UNIX epoche and 
+// Returns true on success, false otherwise
+gboolean slack_set_time(gint64 seconds_since_epoch, gboolean relative);
+
+// Returns if the hardware clock is set to local time or not
+gboolean slack_get_is_localtime ();
+
+// Returns if NTP is enabled
+gboolean slack_get_ntp ();
+
+// Sets NTP
+gboolean slack_set_ntp (gboolean);