1.8 compatibility

lib/foreman.rb

@@ -12,6 +12,10 @@ module Foreman
     defined?(RUBY_PLATFORM) and RUBY_PLATFORM == "java"
   end
 
+  def self.ruby_18?
+    defined?(RUBY_VERSION) and RUBY_VERSION =~ /^1\.8\.\d+/
+  end
+
   def self.windows?
     defined?(RUBY_PLATFORM) and RUBY_PLATFORM =~ /(win|w)32$/
   end

lib/foreman/engine.rb

@@ -260,7 +260,7 @@ private
         loop do
           (IO.select(@readers.values).first || []).each do |reader|
             data = reader.gets
-            output_with_mutex name_for(@readers.key(reader)), data
+            output_with_mutex name_for(@readers.invert[reader]), data
           end
         end
       rescue Exception => ex

lib/foreman/process.rb

@@ -43,6 +43,15 @@ class Foreman::Process
         require "posix/spawn"
         POSIX::Spawn.spawn env, command, :out => output, :err => output
       end
+    elsif Foreman.ruby_18?
+      Dir.chdir(cwd) do
+        fork do
+          $stdout.reopen output
+          $stderr.reopen output
+          env.each { |k,v| ENV[k] = v }
+          exec command
+        end
+      end
     else
       Dir.chdir(cwd) do
         Process.spawn env, command, :out => output, :err => output