1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
-----------------------------------------------------------------------------
-- |
-- 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"]
diskUConfig :: IO MConfig
diskUConfig = mkMConfig "" ["size", "free", "used", "freep", "usedp"]
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 950000 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
setConfigValue tmp template
parseTemplate s
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]
parseTemplate $ s ++ sp
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
|
