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|
-----------------------------------------------------------------------------
-- |
-- Module : Plugins.Monitors.Load.Linux
-- Copyright : Finn Lawler
-- License : BSD-style (see LICENSE)
--
-- Author : Finn Lawler <flawler@cs.tcd.ie>
-- Maintainer : jao <mail@jao.io>
-- Stability : unstable
-- Portability : unportable
--
-- A load average monitor for Xmobar. Adapted from
-- Xmobar.Plugins.Monitors.Thermal by Juraj Hercek.
--
-----------------------------------------------------------------------------
module Xmobar.Plugins.Monitors.Load.Linux (fetchLoads) where
import Xmobar.Plugins.Monitors.Load.Common (Result(..))
import qualified Data.ByteString.Lazy.Char8 as B
import System.Posix.Files (fileExist)
-- | Parses the contents of a loadavg proc file, returning
-- the list of load averages
parseLoadAvgs :: B.ByteString -> [Float]
parseLoadAvgs =
map (read . B.unpack) . take 3 . B.words . head . B.lines
fetchLoads :: IO Result
fetchLoads = do
let file = "/proc/loadavg"
exists <- fileExist file
if exists then
(do contents <- B.readFile file
return $ Result (parseLoadAvgs contents))
else
return NA
|
