diff --git a/.gitignore b/.gitignore
index c361076..88e2cda 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,4 +3,5 @@ pkg/*
 .bundle
 .yardoc
 doc/*
-Gemfile.lock
\ No newline at end of file
+Gemfile.lock
+.idea/
diff --git a/lib/monit.rb b/lib/monit.rb
index 0b5db5e..e47d8cd 100644
--- a/lib/monit.rb
+++ b/lib/monit.rb
@@ -1,3 +1,4 @@
+require "monit/constants"
 require "monit/httpd"
 require "monit/platform"
 require "monit/server"
diff --git a/lib/monit/constants.rb b/lib/monit/constants.rb
new file mode 100644
index 0000000..ff32fdd
--- /dev/null
+++ b/lib/monit/constants.rb
@@ -0,0 +1,61 @@
+# Constants from monit sources:
+# - monit.h
+# - event.h
+module Monit
+  MONITOR_NOT = 0
+  MONITOR_YES = 1
+  MONITOR_INIT = 2
+  MONITOR_WAITING = 4
+
+  MONITORMODE_ACTIVE = 0
+  MONITORMODE_PASSIVE = 1
+  MONITORMODE_MANUAL = 2
+
+  PENDINGACTION_IGNORE = 0
+  PENDINGACTION_ALERT = 1
+  PENDINGACTION_RESTART = 2
+  PENDINGACTION_STOP = 3
+  PENDINGACTION_EXEC = 4
+  PENDINGACTION_UNMONITOR = 5
+  PENDINGACTION_START = 6
+  PENDINGACTION_MONITOR = 7
+
+  STATE_SUCCEEDED = 0
+  STATE_FAILED = 1
+  STATE_CHANGED = 2
+  STATE_CHANGEDNOT = 3
+  STATE_INIT = 4
+
+  SERVICE_TYPE_FILESYSTEM = 0
+  SERVICE_TYPE_DIRECTORY = 1
+  SERVICE_TYPE_FILE = 2
+  SERVICE_TYPE_PROCESS = 3
+  SERVICE_TYPE_HOST = 4
+  SERVICE_TYPE_SYSTEM = 5
+  SERVICE_TYPE_FIFO = 6
+  SERVICE_TYPE_PROGRAM = 7
+
+  STATUS_CHECKSUM = 0x1
+  STATUS_RESOURCE = 0x2
+  STATUS_TIMEOUT = 0x4
+  STATUS_TIMESTAMP = 0x8
+  STATUS_SIZE = 0x10
+  STATUS_CONNECTION = 0x20
+  STATUS_PERMISSION = 0x40
+  STATUS_UID = 0x80
+  STATUS_GID = 0x100
+  STATUS_NONEXIST = 0x200
+  STATUS_INVALID = 0x400
+  STATUS_DATA = 0x800
+  STATUS_EXEC = 0x1000
+  STATUS_FSFLAG = 0x2000
+  STATUS_ICMP = 0x4000
+  STATUS_CONTENT = 0x8000
+  STATUS_INSTANCE = 0x10000
+  STATUS_ACTION = 0x20000
+  STATUS_PID = 0x40000
+  STATUS_PPID = 0x80000
+  STATUS_HEARTBEAT = 0x100000
+  STATUS_STATUS = 0x200000
+  STATUS_UPTIME = 0x40000
+end
diff --git a/lib/monit/service.rb b/lib/monit/service.rb
index 8536e23..22acb30 100644
--- a/lib/monit/service.rb
+++ b/lib/monit/service.rb
@@ -50,6 +50,16 @@ def do(action)
       end
     end
 
+    def has_errors?(code = nil, exact = false)
+      if code.nil? or code == 0
+        self.status.to_i != 0 and self.status_hint.to_i == 0
+      elsif exact
+        self.status.to_i == code and self.status_hint.to_i == 0
+      else
+        (self.status.to_i & code) != 0 and (self.status_hint.to_i & code) == 0
+      end
+    end
+
     private
     # Renames the Service type from "type" to "service_type" to avoid conflicts
     def rename_service_type(hash)
diff --git a/spec/monit_spec.rb b/spec/monit_spec.rb
index 4fcb969..e5532af 100644
--- a/spec/monit_spec.rb
+++ b/spec/monit_spec.rb
@@ -220,5 +220,35 @@
         service.do(:start).should == false
       end
     end
+
+    describe "status checking" do
+      it "should not has errors" do
+        service.has_errors?.should == false
+        service.has_errors?(0).should == false
+        service.has_errors?(0, true).should == false
+      end
+
+      it "should has execution failed errors" do
+        # execution failed errors
+        service.status = "4608"
+        service.status_hint = "0"
+
+        service.has_errors?.should == true
+        service.has_errors?(Monit::STATUS_EXEC).should == true
+        service.has_errors?(Monit::STATUS_NONEXIST).should == true
+        service.has_errors?(Monit::STATUS_EXEC | Monit::STATUS_NONEXIST).should == true
+        service.has_errors?(Monit::STATUS_EXEC, true).should == false
+        service.has_errors?(Monit::STATUS_EXEC | Monit::STATUS_NONEXIST, true).should == true
+      end
+
+      it "should has non-error status" do
+        # execution failed errors
+        service.status = Monit::STATUS_PID.to_s
+        service.status_hint = Monit::STATUS_PID.to_s
+
+        service.has_errors?.should == false
+        service.has_errors?(Monit::STATUS_PID).should == false
+      end
+    end
   end
 end