Implement TimeUSec property

data/org.freedesktop.timedate1.xml

@@ -7,7 +7,8 @@
   <property name="NTP" type="b" access="read"/>
   <property name="CanNTP" type="b" access="read"/>
   <property name="NTPSynchronized" type="b" access="read"/>
-  <property name="TimeUSecRTC" type="t" access="read"/>
+  <property name="TimeUSec" type="t" access="read"/>
+  <property name="RTCTimeUSec" type="t" access="read"/>
   <method name="SetTime">
    <arg name="usec_utc" type="x" direction="in"/>
    <arg name="relative" type="b" direction="in"/>

src/timedate.cpp

@@ -125,9 +125,13 @@ static void slack_get_property(Glib::VariantBase& result, const Glib::RefPtr<Gio
     {
         result = Glib::Variant<bool>::create(dlackware::timedate::ntp_synchronized());
     }
-    else if (prop_name == "TimeUSecRTC")
+    else if (prop_name == "TimeUSec")
     {
-        result = Glib::Variant<std::uint64_t>::create(dlackware::timedate::time_usec_rtc());
+        result = Glib::Variant<std::uint64_t>::create(dlackware::timedate::time_usec());
+    }
+    else if (prop_name == "RTCTimeUSec")
+    {
+        result = Glib::Variant<std::uint64_t>::create(dlackware::timedate::rtc_time_usec());
     }
 }
 
@@ -338,7 +342,30 @@ namespace dlackware::timedate
         return ntp_result != TIME_ERROR && (buffer.status & STA_UNSYNC) == 0;
     }
 
-    std::uint64_t time_usec_rtc()
+    std::uint64_t time_usec()
+    {
+        timespec spec;
+
+        if (clock_gettime(CLOCK_REALTIME, &spec) == -1)
+        {
+            throw std::system_error(errno, std::generic_category());
+        }
+        time_t seconds = spec.tv_sec;
+        tm time;
+
+        if (local_rtc())
+        {
+            gmtime_r(&seconds, &time);
+        }
+        else
+        {
+            localtime_r(&seconds, &time);
+        }
+        return std::chrono::duration_cast<std::chrono::microseconds>(
+                std::chrono::seconds(std::mktime(&time)) + std::chrono::nanoseconds(spec.tv_nsec)).count();
+    }
+
+    std::uint64_t rtc_time_usec()
     {
         return std::chrono::duration_cast<std::chrono::microseconds>(
                 std::chrono::system_clock::now().time_since_epoch()).count();

src/timedate.h

@@ -44,7 +44,10 @@ namespace dlackware::timedate
     bool ntp_synchronized();
 
     // Shows the current time in the RTC.
-    std::uint64_t time_usec_rtc();
+    std::uint64_t rtc_time_usec();
+
+    // Shows the current time on the system.
+    std::uint64_t time_usec();
 
     // Returns the timezones available on the system.
     std::vector<Glib::ustring> list_timezones();