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authorJose Antonio Ortega Ruiz <jao@gnu.org>2010-12-21 02:36:35 +0100
committerJose Antonio Ortega Ruiz <jao@gnu.org>2010-12-21 02:36:35 +0100
commite3853a9cb2a9a2cffa174d1334e2ca8ba610f151 (patch)
tree13aa04faea320afe85636e23686280386c1c2910 /src/Plugins/Monitors/Disk.hs
parent598bfe5deeff079280e8513c55dc7bda3e8cf9a0 (diff)
downloadxmobar-e3853a9cb2a9a2cffa174d1334e2ca8ba610f151.tar.gz
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Haskell sources moved to src/ to unclutter toplevel
Diffstat (limited to 'src/Plugins/Monitors/Disk.hs')
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diff --git a/src/Plugins/Monitors/Disk.hs b/src/Plugins/Monitors/Disk.hs
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+-----------------------------------------------------------------------------
+-- |
+-- Module : Plugins.Monitors.Disk
+-- Copyright : (c) Jose A Ortega Ruiz
+-- License : BSD-style (see LICENSE)
+--
+-- Maintainer : Jose A Ortega Ruiz <jao@gnu.org>
+-- Stability : unstable
+-- Portability : unportable
+--
+-- Disk usage and throughput monitors for Xmobar
+--
+-----------------------------------------------------------------------------
+
+module Plugins.Monitors.Disk ( diskUConfig, runDiskU
+ , diskIOConfig, runDiskIO
+ ) where
+
+import Plugins.Monitors.Common
+import StatFS
+
+import Control.Monad (zipWithM)
+import qualified Data.ByteString.Lazy.Char8 as B
+import Data.List (isPrefixOf, find, intercalate)
+
+diskIOConfig :: IO MConfig
+diskIOConfig = mkMConfig "" ["total", "read", "write",
+ "totalbar", "readbar", "writebar"]
+
+diskUConfig :: IO MConfig
+diskUConfig = mkMConfig ""
+ ["size", "free", "used", "freep", "usedp", "freebar", "usedbar"]
+
+type DevName = String
+type Path = String
+
+mountedDevices :: [String] -> IO [(DevName, Path)]
+mountedDevices req = do
+ s <- B.readFile "/etc/mtab"
+ return (parse s)
+ where
+ parse = map undev . filter isDev . map (firstTwo . B.words) . B.lines
+ firstTwo (a:b:_) = (B.unpack a, B.unpack b)
+ firstTwo _ = ("", "")
+ isDev (d, p) = "/dev/" `isPrefixOf` d &&
+ (p `elem` req || drop 5 d `elem` req)
+ undev (d, f) = (drop 5 d, f)
+
+diskData :: IO [(DevName, [Float])]
+diskData = do
+ s <- B.readFile "/proc/diskstats"
+ let extract ws = (head ws, map read (tail ws))
+ return $ map (extract . map B.unpack . drop 2 . B.words) (B.lines s)
+
+mountedData :: [DevName] -> IO [(DevName, [Float])]
+mountedData devs = do
+ (dt, dt') <- doActionTwiceWithDelay 750000 diskData
+ return $ map (parseDev (zipWith diff dt' dt)) devs
+ where diff (dev, xs) (_, ys) = (dev, zipWith (-) xs ys)
+
+parseDev :: [(DevName, [Float])] -> DevName -> (DevName, [Float])
+parseDev dat dev =
+ case find ((==dev) . fst) dat of
+ Nothing -> (dev, [0, 0, 0])
+ Just (_, xs) ->
+ let rSp = speed (xs !! 2) (xs !! 3)
+ wSp = speed (xs !! 6) (xs !! 7)
+ sp = speed (xs !! 2 + xs !! 6) (xs !! 3 + xs !! 7)
+ speed x t = if t == 0 then 0 else 500 * x / t
+ dat' = if length xs > 6 then [sp, rSp, wSp] else [0, 0, 0]
+ in (dev, dat')
+
+fsStats :: String -> IO [Integer]
+fsStats path = do
+ stats <- getFileSystemStats path
+ case stats of
+ Nothing -> return [-1, -1, -1]
+ Just f -> let tot = fsStatByteCount f
+ free = fsStatBytesAvailable f
+ used = fsStatBytesUsed f
+ in return [tot, free, used]
+
+speedToStr :: Float -> String
+speedToStr = showWithUnits 2 1
+
+sizeToStr :: Integer -> String
+sizeToStr = showWithUnits 3 0 . fromIntegral
+
+findTempl :: DevName -> Path -> [(String, String)] -> String
+findTempl dev path disks =
+ case find devOrPath disks of
+ Just (_, t) -> t
+ Nothing -> ""
+ where devOrPath (d, _) = d == dev || d == path
+
+devTemplates :: [(String, String)]
+ -> [(DevName, Path)]
+ -> [(DevName, [Float])]
+ -> [(String, [Float])]
+devTemplates disks mounted dat =
+ map (\(d, p) -> (findTempl d p disks, findData d)) mounted
+ where findData dev = case find ((==dev) . fst) dat of
+ Nothing -> [0, 0, 0]
+ Just (_, xs) -> xs
+
+runDiskIO' :: (String, [Float]) -> Monitor String
+runDiskIO' (tmp, xs) = do
+ s <- mapM (showWithColors speedToStr) xs
+ b <- mapM (showLogBar 0.8) xs
+ setConfigValue tmp template
+ parseTemplate $ s ++ b
+
+runDiskIO :: [(String, String)] -> [String] -> Monitor String
+runDiskIO disks _ = do
+ mounted <- io $ mountedDevices (map fst disks)
+ dat <- io $ mountedData (map fst mounted)
+ strs <- mapM runDiskIO' $ devTemplates disks mounted dat
+ return $ intercalate " " strs
+
+runDiskU' :: String -> String -> Monitor String
+runDiskU' tmp path = do
+ setConfigValue tmp template
+ fstats <- io $ fsStats path
+ let strs = map sizeToStr fstats
+ freep = (fstats !! 1) * 100 `div` head fstats
+ fr = fromIntegral freep / 100
+ s <- zipWithM showWithColors' strs [100, freep, 100 - freep]
+ sp <- showPercentsWithColors [fr, 1 - fr]
+ fb <- showPercentBar (fromIntegral freep) fr
+ ub <- showPercentBar (fromIntegral $ 100 - freep) (1 - fr)
+ parseTemplate $ s ++ sp ++ [fb, ub]
+
+runDiskU :: [(String, String)] -> [String] -> Monitor String
+runDiskU disks _ = do
+ devs <- io $ mountedDevices (map fst disks)
+ strs <- mapM (\(d, p) -> runDiskU' (findTempl d p disks) p) devs
+ return $ intercalate " " strs