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|
-----------------------------------------------------------------------------
-- |
-- Module : Plugins.Monitors.Swap
-- Copyright : (c) Andrea Rossato
-- License : BSD-style (see LICENSE)
--
-- Maintainer : Andrea Rossato <andrea.rossato@unibz.it>
-- Stability : unstable
-- Portability : unportable
--
-- A swap usage monitor for Xmobar
--
-----------------------------------------------------------------------------
module Plugins.Monitors.Swap where
import Plugins.Monitors.Common
import qualified Data.ByteString.Lazy.Char8 as B
swapConfig :: IO MConfig
swapConfig = mkMConfig
"Swap: <usedratio>" -- template
["total", "used", "free", "usedratio"] -- available replacements
fileMEM :: IO B.ByteString
fileMEM = B.readFile "/proc/meminfo"
parseMEM :: IO [Float]
parseMEM =
do file <- fileMEM
let li i l
| l /= [] = (head l) !! i
| otherwise = B.empty
fs s l
| l == [] = False
| otherwise = head l == B.pack s
get_data s = flip (/) 1024 . read . B.unpack . li 1 . filter (fs s)
st = map B.words . B.lines $ file
tot = get_data "SwapTotal:" st
free = get_data "SwapFree:" st
return [tot, (tot - free), free, (tot - free) / tot]
formatSwap :: [Float] -> Monitor [String]
formatSwap x =
do let f1 n = showDigits 2 n
f2 n = floatToPercent n
(hd, tl) = splitAt 3 x
firsts <- mapM (showWithColors f1) hd
lasts <- mapM (showWithColors f2) tl
return $ firsts ++ lasts
runSwap :: [String] -> Monitor String
runSwap _ =
do m <- io $ parseMEM
l <- formatSwap m
parseTemplate l
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