Update the old clamav tests to check process with systemctl

This extra bit of code calls `systemctl` to see if the clam processes
are running, rather than checking the pidfile.  This command exits zero
if the service is running.

 If systemctl is unsuccessful for *any* reason, then fall back on
checking the pidfile.

Starting/stopping the processes still works via the sysvinit
compatibility layer.

If systemd is not running, the systemctl command displays

    Failed to get D-Bus connection: Unknown error -1

and exits non-zero, so we continue on to the pidfile check.

This closes #49.

email/symbiosis/monit.d/clamav-daemon

@@ -11,6 +11,21 @@ class ClamdCheck < Symbiosis::Monitor::Check
     @name = "clamd"
   end
 
+  #
+  # This is a monkey-patch for clamav under Jessie, which runs under systemd by
+  # default, and doesn't write a pidfile.  Starting / stopping works via the
+  # systemd/sysvinit compatibility layer.
+  #
+  def running
+    `systemctl status clamav-daemon.service`
+		if $? and $?.success?
+      puts "Found clamav-daemon running via systemctl"
+      return true
+    end
+
+    super
+  end
+
   def do_check
     #
     # Check the initscript.  If it is missing, make sure that the process is
@@ -26,7 +41,7 @@ class ClamdCheck < Symbiosis::Monitor::Check
     end
 
     r = do_process_check
-    if SystemExit::EX_TEMPFAIL == r 
+    if SystemExit::EX_TEMPFAIL == r
       should_be_running ? self.start : self.stop
     end
     return r
@@ -37,12 +52,12 @@ class ClamdCheck < Symbiosis::Monitor::Check
   end
 
   #
-  # Ignore the test if 
-  #   * dpkg if running 
+  # Ignore the test if
+  #   * dpkg if running
   #   * the initscript is missing and clamav should not be running.
   #
   def should_ignore?
-    self.class.dpkg_running? or 
+    self.class.dpkg_running? or
       (not File.exist?(@process.initscript) and not should_be_running)
   end
 end

email/symbiosis/monit.d/clamav-freshclam

@@ -11,6 +11,21 @@ class FreshclamCheck < Symbiosis::Monitor::Check
     @name = "freshclam"
   end
 
+  #
+  # This is a monkey-patch for clamav under Jessie, which runs under systemd by
+  # default, and doesn't write a pidfile.  Starting / stopping works via the
+  # systemd/sysvinit compatibility layer.
+  #
+  def running
+   `systemctl status clamav-freshclam.service`
+	 if $? and $?.success?
+      puts "Found clamav-freshclam running via systemctl"
+      return true
+    end
+
+    super
+  end
+
   def do_check
     #
     # Check the initscript.  If it is missing, make sure that the process is
@@ -26,7 +41,7 @@ class FreshclamCheck < Symbiosis::Monitor::Check
     end
 
     r = do_process_check
-    if SystemExit::EX_TEMPFAIL == r 
+    if SystemExit::EX_TEMPFAIL == r
       should_be_running ? self.start : self.stop
     end
     return r