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diff --git a/src/SignalHandler.cc b/src/SignalHandler.cc
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index 0000000..67f83fa
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+++ b/src/SignalHandler.cc
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+// SignalHandler.cc for Fluxbox Window Manager
+// Copyright (c) 2002 Henrik Kinnunen (fluxgen@linuxmail.org)
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.        IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+
+// $Id: SignalHandler.cc,v 1.1 2002/08/13 23:57:04 fluxgen Exp $
+
+#include "SignalHandler.hh"
+
+namespace FbTk {
+
+SignalHandler::EventHandler *SignalHandler::s_signal_handler[NSIG];
+
+SignalHandler::SignalHandler() {
+        // clear signal list
+        for (int i=0; i < NSIG; ++i)
+                s_signal_handler[i] = 0;
+}
+
+SignalHandler *SignalHandler::instance() {
+        static SignalHandler singleton;
+        return &singleton;
+}
+
+bool SignalHandler::registerHandler(int signum, EventHandler *eh, EventHandler **oldhandler_ret) {
+        // must be less than NSIG
+        if (signum >= NSIG)
+                return false;
+
+        // get old signal handler for this signum
+        if (oldhandler_ret != 0)
+                *oldhandler_ret = s_signal_handler[signum];
+        
+        struct sigaction sa;
+        // set callback
+        sa.sa_handler = SignalHandler::handleSignal;
+        sigemptyset (&sa.sa_mask);
+        sa.sa_flags = 0;
+        
+        if (sigaction(signum, &sa, 0) == -1)
+                return false;
+        
+        s_signal_handler[signum] = eh;
+        
+        return true;
+}
+
+void SignalHandler::removeHandler(int signum) {
+        if (signum < NSIG)
+                s_signal_handler[signum] = 0; // clear handler pointer
+}
+
+void SignalHandler::handleSignal(int signum) {
+        // make sure we got a handler for this signal
+        if (s_signal_handler[signum] != 0)
+                s_signal_handler[signum]->handleSignal(signum);
+}
+
+};