lib/fake_ftp/server.rb in fake_ftp-0.0.7 vs lib/fake_ftp/server.rb in fake_ftp-0.0.8

@@ -1,7 +1,8 @@
 require 'socket'
 require 'thread'
+require 'timeout'
 
 module FakeFtp
   class Server
 
     attr_accessor :port, :passive_port
@@ -69,12 +70,11 @@
       @data_server.close if @data_server
       @data_server = nil
     end
 
     def is_running?(tcp_port = nil)
-      service = `lsof -w -n -i tcp:#{tcp_port || port}`
-      !service.nil? && service != ''
+      tcp_port.nil? ? port_is_open?(port) : port_is_open?(tcp_port)
     end
 
     private
 
     def respond_with(stuff)
@@ -222,8 +222,27 @@
       (name.to_s == 'anonymous') ? '230 logged in' : '331 send your password'
     end
 
     def active?
       @mode == :active
+    end
+    
+    private
+    
+    def port_is_open?(port)
+      begin
+        Timeout::timeout(1) do
+          begin
+            s = TCPSocket.new("127.0.0.1", port)
+            s.close
+            return true
+          rescue Errno::ECONNREFUSED, Errno::EHOSTUNREACH
+            return false
+          end
+        end
+      rescue Timeout::Error
+      end
+
+      return false
     end
   end
 end