40 lines
1.1 KiB
Haskell
40 lines
1.1 KiB
Haskell
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{-# LANGUAGE BangPatterns #-}
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import Control.Concurrent (threadDelay)
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import Control.Monad (mapM)
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import System.Directory (listDirectory)
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import Data.Bool (bool)
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path :: String
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path = "/sys/class/net/"
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data Statistics = Statistics !Float !Float
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instance Semigroup Statistics where
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Statistics a b <> Statistics c d = Statistics (a + c) (b + d)
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instance Monoid Statistics where
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mempty = Statistics 0 0
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icon :: String -> String
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icon i = "<span font='Material Icons 11'>" ++ i ++ "</span>"
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readInterface :: FilePath -> IO Statistics
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readInterface interface = do
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rx <- read <$> readFile (path ++ interface ++ "/statistics/rx_bytes")
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tx <- read <$> readFile (path ++ interface ++ "/statistics/tx_bytes")
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return $ Statistics rx tx
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readInterfaces :: [FilePath] -> IO Statistics
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readInterfaces interfaces = mconcat <$> (mapM readInterface interfaces)
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main :: IO ()
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main = do
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interfaces <- listDirectory path
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Statistics rx tx <- readInterfaces interfaces
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threadDelay 1000000
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Statistics rx' tx' <- readInterfaces interfaces
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putStrLn
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$ (bool (icon "\58052") "" (rx' - rx > 100))
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++ (bool (icon "\58054") "" (tx' - tx > 100))
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