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diff --git a/src/lib/Xmobar/Plugins/Monitors/Cpu.hs b/src/lib/Xmobar/Plugins/Monitors/Cpu.hs
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+-----------------------------------------------------------------------------
+-- |
+-- Module : Plugins.Monitors.Cpu
+-- Copyright : (c) 2011, 2017 Jose Antonio Ortega Ruiz
+-- (c) 2007-2010 Andrea Rossato
+-- License : BSD-style (see LICENSE)
+--
+-- Maintainer : Jose A. Ortega Ruiz <jao@gnu.org>
+-- Stability : unstable
+-- Portability : unportable
+--
+-- A cpu monitor for Xmobar
+--
+-----------------------------------------------------------------------------
+
+module Xmobar.Plugins.Monitors.Cpu (startCpu) where
+
+import Xmobar.Plugins.Monitors.Common
+import qualified Data.ByteString.Lazy.Char8 as B
+import Data.IORef (IORef, newIORef, readIORef, writeIORef)
+import System.Console.GetOpt
+
+newtype CpuOpts = CpuOpts
+ { loadIconPattern :: Maybe IconPattern
+ }
+
+defaultOpts :: CpuOpts
+defaultOpts = CpuOpts
+ { loadIconPattern = Nothing
+ }
+
+options :: [OptDescr (CpuOpts -> CpuOpts)]
+options =
+ [ Option "" ["load-icon-pattern"] (ReqArg (\x o ->
+ o { loadIconPattern = Just $ parseIconPattern x }) "") ""
+ ]
+
+parseOpts :: [String] -> IO CpuOpts
+parseOpts argv =
+ case getOpt Permute options argv of
+ (o, _, []) -> return $ foldr id defaultOpts o
+ (_, _, errs) -> ioError . userError $ concat errs
+
+cpuConfig :: IO MConfig
+cpuConfig = mkMConfig
+ "Cpu: <total>%"
+ ["bar","vbar","ipat","total","user","nice","system","idle","iowait"]
+
+type CpuDataRef = IORef [Int]
+
+cpuData :: IO [Int]
+cpuData = cpuParser `fmap` B.readFile "/proc/stat"
+
+cpuParser :: B.ByteString -> [Int]
+cpuParser = map (read . B.unpack) . tail . B.words . head . B.lines
+
+parseCpu :: CpuDataRef -> IO [Float]
+parseCpu cref =
+ do a <- readIORef cref
+ b <- cpuData
+ writeIORef cref b
+ let dif = zipWith (-) b a
+ tot = fromIntegral $ sum dif
+ percent = map ((/ tot) . fromIntegral) dif
+ return percent
+
+formatCpu :: CpuOpts -> [Float] -> Monitor [String]
+formatCpu _ [] = return $ replicate 8 ""
+formatCpu opts xs = do
+ let t = sum $ take 3 xs
+ b <- showPercentBar (100 * t) t
+ v <- showVerticalBar (100 * t) t
+ d <- showIconPattern (loadIconPattern opts) t
+ ps <- showPercentsWithColors (t:xs)
+ return (b:v:d:ps)
+
+runCpu :: CpuDataRef -> [String] -> Monitor String
+runCpu cref argv =
+ do c <- io (parseCpu cref)
+ opts <- io $ parseOpts argv
+ l <- formatCpu opts c
+ parseTemplate l
+
+startCpu :: [String] -> Int -> (String -> IO ()) -> IO ()
+startCpu a r cb = do
+ cref <- newIORef []
+ _ <- parseCpu cref
+ runM a cpuConfig (runCpu cref) r cb