* lib/un.rb (httpd): SIGQUIT and SIGHUP are not guaranteed to exist.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28944 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/un.rb b/lib/un.rb
index 1c52c2f469..3c1f3eca86 100644
--- a/lib/un.rb
+++ b/lib/un.rb
@@ -317,9 +317,9 @@ def httpd
     s = WEBrick::HTTPServer.new(options)
     shut = proc {s.shutdown}
     Signal.trap("TERM", shut)
-    Signal.trap("QUIT", shut)
+    Signal.trap("QUIT", shut) if Signal.list.has_key?("QUIT")
     if STDIN.tty?
-      Signal.trap("HUP", shut)
+      Signal.trap("HUP", shut) if Signal.list.has_key?("HUP")
       Signal.trap("INT", shut)
     end
     s.start