From cbe2cb353c82ce38caf3f58185dd7fb46897f554 Mon Sep 17 00:00:00 2001
From: slavic <slavic@home>
Date: Sun, 24 Apr 2011 20:21:39 +0300
Subject: [PATCH] fix issue #27

---
 lib/guard/interactor.rb | 48 +++++++++++++++++++++++++----------------
 1 file changed, 30 insertions(+), 18 deletions(-)

diff --git a/lib/guard/interactor.rb b/lib/guard/interactor.rb
index f5247eb..32dab08 100644
--- a/lib/guard/interactor.rb
+++ b/lib/guard/interactor.rb
@@ -1,29 +1,41 @@
 module Guard
   module Interactor
-    
-    def self.init_signal_traps
+
+    def self.init_signal_traps 
       # Run all (Ctrl-\)
-      Signal.trap('QUIT') do
-        ::Guard.run do
-          ::Guard.guards.each { |guard| ::Guard.supervised_task(guard, :run_all) }
+      if Signal.list.has_key?('QUIT')
+        Signal.trap('QUIT') do
+          ::Guard.run do
+            ::Guard.guards.each { |guard| ::Guard.supervised_task(guard, :run_all) }
+          end
         end
+      else
+        UI.info "Your system doesn't support QUIT signal, so Ctrl-\\ (Run all) won't work"
       end
-      
+
       # Stop (Ctrl-C)
-      Signal.trap('INT') do
-        UI.info "Bye bye...", :reset => true
-        ::Guard.listener.stop
-        ::Guard.guards.each { |guard| ::Guard.supervised_task(guard, :stop) }
-        abort("\n")
-      end
-      
-      # Reload (Ctrl-Z)
-      Signal.trap('TSTP') do
-        ::Guard.run do
-          ::Guard.guards.each { |guard| ::Guard.supervised_task(guard, :reload) }
+      if Signal.list.has_key?('INT')
+        Signal.trap('INT') do
+          UI.info "Bye bye...", :reset => true
+          ::Guard.listener.stop
+          ::Guard.guards.each { |guard| ::Guard.supervised_task(guard, :stop) }
+          abort("\n")
         end
+      else
+        UI.info "Your system doesn't support INT signal, so Ctrl-C (stop) won't work"
+      end
+
+      # Reload (Ctrl-Z)
+      if Signal.list.has_key?('TSTP')
+        Signal.trap('TSTP') do
+          ::Guard.run do
+            ::Guard.guards.each { |guard| ::Guard.supervised_task(guard, :reload) }
+          end
+        end
+      else
+        UI.info "Your system doesn't support TSTP signal, so Ctrl-Z (Reload) won't work"
       end
     end
-    
+
   end
 end
\ No newline at end of file