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
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
-----------------------------------------------------------------------------
-- |
-- Module : Plugins.Monitors.Disk
-- Copyright : (c) 2010, 2011, 2012 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, startDiskIO) where
import Plugins.Monitors.Common
import StatFS
import Data.IORef (IORef, newIORef, readIORef, writeIORef)
import Control.Exception (SomeException, handle)
import Control.Monad (zipWithM)
import qualified Data.ByteString.Lazy.Char8 as B
import Data.List (isPrefixOf, find)
import System.Directory (canonicalizePath)
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
type DevDataRef = IORef [(DevName, [Float])]
mountedDevices :: [String] -> IO [(DevName, Path)]
mountedDevices req = do
s <- B.readFile "/etc/mtab"
parse `fmap` mapM canon (devs s)
where
canon (d, p) = do {d' <- canonicalizePath d; return (d', p)}
devs = filter isDev . map (firstTwo . B.words) . B.lines
parse = map undev . filter isReq
firstTwo (a:b:_) = (B.unpack a, B.unpack b)
firstTwo _ = ("", "")
isDev (d, _) = "/dev/" `isPrefixOf` d
isReq (d, p) = 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 :: DevDataRef -> [DevName] -> IO [(DevName, [Float])]
mountedData dref devs = do
dt <- readIORef dref
dt' <- diskData
writeIORef dref dt'
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')
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 :: DevDataRef -> [(String, String)] -> [String] -> Monitor String
runDiskIO dref disks _ = do
mounted <- io $ mountedDevices (map fst disks)
dat <- io $ mountedData dref (map fst mounted)
strs <- mapM runDiskIO' $ devTemplates disks mounted dat
return $ unwords strs
startDiskIO :: [(String, String)] ->
[String] -> Int -> (String -> IO ()) -> IO ()
startDiskIO disks args rate cb = do
mounted <- mountedDevices (map fst disks)
dref <- newIORef (map (\d -> (fst d, repeat 0)) mounted)
_ <- mountedData dref (map fst mounted)
runM args diskIOConfig (runDiskIO dref disks) rate cb
fsStats :: String -> IO [Integer]
fsStats path = do
stats <- getFileSystemStats path
case stats of
Nothing -> return [0, 0, 0]
Just f -> let tot = fsStatByteCount f
free = fsStatBytesAvailable f
used = fsStatBytesUsed f
in return [tot, free, used]
runDiskU' :: String -> String -> Monitor String
runDiskU' tmp path = do
setConfigValue tmp template
[total, free, diff] <- io (handle ign $ fsStats path)
let strs = map sizeToStr [total, free, diff]
freep = if total > 0 then free * 100 `div` total else 0
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]
where ign = const (return [0, 0, 0]) :: SomeException -> IO [Integer]
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 $ unwords strs
|
