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
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
-----------------------------------------------------------------------------
-- |
-- Module : Plugins.Monitors.Net
-- Copyright : (c) 2011, 2012, 2013, 2014, 2017 Jose Antonio Ortega Ruiz
-- (c) 2007-2010 Andrea Rossato
-- License : BSD-style (see LICENSE)
--
-- Maintainer : Jose A. Ortega Ruiz <jao@gnu.org>
-- Stability : unstable
-- Portability : unportable
--
-- A net device monitor for Xmobar
--
-----------------------------------------------------------------------------
module Plugins.Monitors.Net (
startNet
, startDynNet
) where
import Plugins.Monitors.Common
import Data.Word (Word64)
import Data.IORef (IORef, newIORef, readIORef, writeIORef)
import Data.Time.Clock (UTCTime, getCurrentTime, diffUTCTime)
import Control.Monad (forM, filterM)
import System.Directory (getDirectoryContents, doesFileExist)
import System.FilePath ((</>))
import System.Console.GetOpt
import qualified Data.ByteString.Lazy.Char8 as B
data NetOpts = NetOpts
{ rxIconPattern :: Maybe IconPattern
, txIconPattern :: Maybe IconPattern
}
defaultOpts :: NetOpts
defaultOpts = NetOpts
{ rxIconPattern = Nothing
, txIconPattern = Nothing
}
options :: [OptDescr (NetOpts -> NetOpts)]
options =
[ Option "" ["rx-icon-pattern"] (ReqArg (\x o ->
o { rxIconPattern = Just $ parseIconPattern x }) "") ""
, Option "" ["tx-icon-pattern"] (ReqArg (\x o ->
o { txIconPattern = Just $ parseIconPattern x }) "") ""
]
parseOpts :: [String] -> IO NetOpts
parseOpts argv =
case getOpt Permute options argv of
(o, _, []) -> return $ foldr id defaultOpts o
(_, _, errs) -> ioError . userError $ concat errs
data UnitPerSec = Bs | KBs | MBs | GBs deriving (Eq,Enum,Ord)
data NetValue = NetValue Float UnitPerSec deriving (Eq,Show)
instance Show UnitPerSec where
show Bs = "B/s"
show KBs = "KB/s"
show MBs = "MB/s"
show GBs = "GB/s"
data NetDev num
= NA
| NI String
| ND String num num deriving (Eq,Show,Read)
type NetDevRawTotal = NetDev Word64
type NetDevRate = NetDev Float
type NetDevRef = IORef (NetDevRawTotal, UTCTime)
-- The more information available, the better.
-- Note that names don't matter. Therefore, if only the names differ,
-- a compare evaluates to EQ while (==) evaluates to False.
instance Ord num => Ord (NetDev num) where
compare NA NA = EQ
compare NA _ = LT
compare _ NA = GT
compare (NI _) (NI _) = EQ
compare (NI _) ND {} = LT
compare ND {} (NI _) = GT
compare (ND _ x1 y1) (ND _ x2 y2) =
if downcmp /= EQ
then downcmp
else y1 `compare` y2
where downcmp = x1 `compare` x2
netConfig :: IO MConfig
netConfig = mkMConfig
"<dev>: <rx>KB|<tx>KB" -- template
["dev", "rx", "tx", "rxbar", "rxvbar", "rxipat", "txbar", "txvbar", "txipat"] -- available replacements
operstateDir :: String -> FilePath
operstateDir d = "/sys/class/net" </> d </> "operstate"
existingDevs :: IO [String]
existingDevs = getDirectoryContents "/sys/class/net" >>= filterM isDev
where isDev d | d `elem` excludes = return False
| otherwise = doesFileExist (operstateDir d)
excludes = [".", "..", "lo"]
isUp :: String -> IO Bool
isUp d = do
operstate <- B.readFile (operstateDir d)
return $ (B.unpack . head . B.lines) operstate `elem` ["up", "unknown"]
readNetDev :: [String] -> IO NetDevRawTotal
readNetDev (d:x:y:_) = do
up <- isUp d
return (if up then ND d (r x) (r y) else NI d)
where r s | s == "" = 0
| otherwise = read s
readNetDev _ = return NA
netParser :: B.ByteString -> IO [NetDevRawTotal]
netParser = mapM (readNetDev . splitDevLine) . readDevLines
where readDevLines = drop 2 . B.lines
splitDevLine = selectCols . wordsBy (`elem` " :") . B.unpack
selectCols cols = map (cols!!) [0,1,9]
wordsBy f s = case dropWhile f s of
[] -> []
s' -> w : wordsBy f s'' where (w, s'') = break f s'
findNetDev :: String -> IO NetDevRawTotal
findNetDev dev = do
nds <- B.readFile "/proc/net/dev" >>= netParser
case filter isDev nds of
x:_ -> return x
_ -> return NA
where isDev (ND d _ _) = d == dev
isDev (NI d) = d == dev
isDev NA = False
formatNet :: Maybe IconPattern -> Float -> Monitor (String, String, String, String)
formatNet mipat d = do
s <- getConfigValue useSuffix
dd <- getConfigValue decDigits
let str True v = showDigits dd d' ++ show u
where (NetValue d' u) = byteNetVal v
str False v = showDigits dd $ v / 1024
b <- showLogBar 0.9 d
vb <- showLogVBar 0.9 d
ipat <- showLogIconPattern mipat 0.9 d
x <- showWithColors (str s) d
return (x, b, vb, ipat)
printNet :: NetOpts -> NetDevRate -> Monitor String
printNet opts nd =
case nd of
ND d r t -> do
(rx, rb, rvb, ripat) <- formatNet (rxIconPattern opts) r
(tx, tb, tvb, tipat) <- formatNet (txIconPattern opts) t
parseTemplate [d,rx,tx,rb,rvb,ripat,tb,tvb,tipat]
NI _ -> return ""
NA -> getConfigValue naString
parseNet :: NetDevRef -> String -> IO NetDevRate
parseNet nref nd = do
(n0, t0) <- readIORef nref
n1 <- findNetDev nd
t1 <- getCurrentTime
writeIORef nref (n1, t1)
let scx = realToFrac (diffUTCTime t1 t0)
scx' = if scx > 0 then scx else 1
rate da db = takeDigits 2 $ fromIntegral (db - da) / scx'
diffRate (ND d ra ta) (ND _ rb tb) = ND d (rate ra rb) (rate ta tb)
diffRate (NI d) _ = NI d
diffRate _ (NI d) = NI d
diffRate _ _ = NA
return $ diffRate n0 n1
runNet :: NetDevRef -> String -> [String] -> Monitor String
runNet nref i argv = do
dev <- io $ parseNet nref i
opts <- io $ parseOpts argv
printNet opts dev
parseNets :: [(NetDevRef, String)] -> IO [NetDevRate]
parseNets = mapM $ uncurry parseNet
runNets :: [(NetDevRef, String)] -> [String] -> Monitor String
runNets refs argv = do
dev <- io $ parseActive refs
opts <- io $ parseOpts argv
printNet opts dev
where parseActive refs' = fmap selectActive (parseNets refs')
selectActive = maximum
startNet :: String -> [String] -> Int -> (String -> IO ()) -> IO ()
startNet i a r cb = do
t0 <- getCurrentTime
nref <- newIORef (NA, t0)
_ <- parseNet nref i
runM a netConfig (runNet nref i) r cb
startDynNet :: [String] -> Int -> (String -> IO ()) -> IO ()
startDynNet a r cb = do
devs <- existingDevs
refs <- forM devs $ \d -> do
t <- getCurrentTime
nref <- newIORef (NA, t)
_ <- parseNet nref d
return (nref, d)
runM a netConfig (runNets refs) r cb
byteNetVal :: Float -> NetValue
byteNetVal v
| v < 1024**1 = NetValue v Bs
| v < 1024**2 = NetValue (v/1024**1) KBs
| v < 1024**3 = NetValue (v/1024**2) MBs
| otherwise = NetValue (v/1024**3) GBs
|
