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|
-----------------------------------------------------------------------------
-- |
-- Module : Plugins.Monitors.Swap
-- Copyright : (c) Andrea Rossato
-- License : BSD-style (see LICENSE)
--
-- Maintainer : Jose A. Ortega Ruiz <jao@gnu.org>
-- 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
["usedratio", "total", "used", "free"] -- 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
| null 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 - free) / tot, tot, tot - free, free]
formatSwap :: [Float] -> Monitor [String]
formatSwap (r:xs) = do
d <- getConfigValue decDigits
other <- mapM (showWithColors (showDigits d)) xs
ratio <- showPercentWithColors r
return $ ratio:other
formatSwap _ = return $ replicate 4 "N/A"
runSwap :: [String] -> Monitor String
runSwap _ =
do m <- io parseMEM
l <- formatSwap m
parseTemplate l
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