Add support for numlockx.

 Ported from slick-greeter:

 From 82d912b8fe98e01c80a59e3c010b1bbb18c859b0 Mon Sep 17 00:00:00 2001
 From: Clement Lefebvre <clement.lefebvre@linuxmint.com>
 Date: Tue, 11 Jul 2017 16:57:23 +0200
 Subject: [PATCH 1/1] Add support for numlockx

1 files changed, 16 insertions, 0 deletions

diff --git a/src/arctica-greeter.vala b/src/arctica-greeter.vala
index 0355534..94a1eb0 100644
--- a/src/arctica-greeter.vala
+++ b/src/arctica-greeter.vala
@@ -580,6 +580,16 @@ public class ArcticaGreeter
         greeter_ready ();
     }
 
+    private static void activate_numlock ()
+    {
+        try {
+            Process.spawn_command_line_sync("/usr/bin/numlockx on", null, null, null);
+        }
+        catch (Error e){
+            warning ("Error while activating numlock: %s", e.message);
+        }
+    }
+
     public static int main (string[] args)
     {
         /* Protect memory from being paged to disk, as we deal with passwords */
@@ -641,6 +651,12 @@ public class ArcticaGreeter
         if (do_test_mode)
             debug ("Running in test mode");
 
+        /* Set the numlock state */
+        if (AGSettings.get_boolean (AGSettings.KEY_ACTIVATE_NUMLOCK)) {
+            debug ("Activating numlock");
+            activate_numlock ();
+        }
+
         Pid atspi_pid = 0;
         if (!do_test_mode)
         {