[smuxi] Frontend-GNOME: install signal handlers for SIGINT/TERM

[Mirco M. M. Bauer <mmmbauer src gnome org>]

commit ac085d58e0c3495a371fbba0c912df9be6ca17b8
Author: Mirco Bauer <meebey meebey net>
Date:   Thu Apr 23 07:08:19 2015 +0200

    Frontend-GNOME: install signal handlers for SIGINT/TERM
    
    ^C from the terminal (SIGINT) does no longer work for the first Smuxi instance
    as the SingleApplicationInstance library installs Unix signal handlers for
    SIGINT to cleanup lock files. GTK+ does no longer handle SIGINT itself when
    there are already installed signal handlers. Thus the GNOME frontend has to
    explicitly install signal handlers itself.

 src/Frontend-GNOME/Frontend.cs |   30 +++++++++++++++++++++++++++++-
 1 files changed, 29 insertions(+), 1 deletions(-)
---
diff --git a/src/Frontend-GNOME/Frontend.cs b/src/Frontend-GNOME/Frontend.cs
index c23a07f..14ba9bb 100644
--- a/src/Frontend-GNOME/Frontend.cs
+++ b/src/Frontend-GNOME/Frontend.cs
@@ -1,7 +1,7 @@
 /*
  * Smuxi - Smart MUltipleXed Irc
  *
- * Copyright (c) 2005-2014 Mirco Bauer <meebey meebey net>
+ * Copyright (c) 2005-2015 Mirco Bauer <meebey meebey net>
  *
  * Full GPL License: <http://www.gnu.org/licenses/gpl.txt>
  *
@@ -27,6 +27,8 @@ using System.Linq;
 using System.Threading;
 using System.Reflection;
 using SysDiag = System.Diagnostics;
+using Mono.Unix;
+using Mono.Unix.Native;
 using MonoDevelop.MacInterop;
 using Smuxi.Engine;
 using Smuxi.Common;
@@ -203,6 +205,7 @@ namespace Smuxi.Frontend.Gnome
             _Logger.Info(_VersionString + " starting");
 #endif
 
+            InitSignalHandlers();
             InitGtk(args);
 
             //_SplashScreenWindow = new SplashScreenWindow();
@@ -1024,6 +1027,31 @@ namespace Smuxi.Frontend.Gnome
             return false;
         }
 
+        static void InitSignalHandlers()
+        {
+            if ((Environment.OSVersion.Platform == PlatformID.Unix) ||
+                (Environment.OSVersion.Platform == PlatformID.MacOSX)) {
+                // Register shutdown handlers
+#if LOG4NET
+                _Logger.Info("Registering signal handlers");
+#endif
+                UnixSignal[] shutdown_signals = {
+                    new UnixSignal(Signum.SIGINT),
+                    new UnixSignal(Signum.SIGTERM),
+                };
+                Thread signal_thread = new Thread(() => {
+                    var index = UnixSignal.WaitAny(shutdown_signals);
+#if LOG4NET
+                    _Logger.Info("Caught signal " + shutdown_signals[index].Signum.ToString() + ", shutting 
down");
+#endif
+                    Gtk.Application.Invoke(delegate {
+                        Quit();
+                    });
+                });
+                signal_thread.Start();
+            }
+        }
+
         private static void InitGtk(string[] args)
         {
             if (Environment.OSVersion.Platform == PlatformID.Win32NT) {