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------------------------------------------------------------------------------
--- |
--- Module : Plugins.Monitors.CoreCommon
--- Copyright : (c) Juraj Hercek
--- License : BSD-style (see LICENSE)
---
--- Maintainer : Juraj Hercek <juhe_haskell@hck.sk>
--- Stability : unstable
--- Portability : unportable
---
--- The common part for cpu core monitors (e.g. cpufreq, coretemp)
---
------------------------------------------------------------------------------
-
-module Plugins.Monitors.CoreCommon where
-
-import Plugins.Monitors.Common
-import System.Posix.Files (fileExist)
-import System.IO (withFile, IOMode(ReadMode), hGetLine)
-import System.Directory
-import Data.Char (isDigit)
-import Data.List (isPrefixOf)
-
--- |
--- Function checks the existence of first file specified by pattern and if the
--- file doesn't exists failure message is shown, otherwise the data retrieval
--- is performed.
-checkedDataRetrieval :: (Num a, Ord a, Show a) =>
- String -> String -> String -> String -> (Double -> a)
- -> (a -> String) -> Monitor String
-checkedDataRetrieval failureMessage dir file pattern trans fmt = do
- exists <- io $ fileExist $ concat [dir, "/", pattern, "0/", file]
- case exists of
- False -> return failureMessage
- True -> retrieveData dir file pattern trans fmt
-
--- |
--- Function retrieves data from files in directory dir specified by
--- pattern. String values are converted to double and 'trans' applied
--- to each one. Final array is processed by template parser function
--- and returned as monitor string.
-retrieveData :: (Num a, Ord a, Show a) =>
- String -> String -> String -> (Double -> a) -> (a -> String) ->
- Monitor String
-retrieveData dir file pattern trans fmt = do
- count <- io $ dirCount dir pattern
- contents <- io $ mapM getGuts $ files count
- values <- mapM (showWithColors fmt) $ map conversion contents
- parseTemplate values
- where
- getGuts f = withFile f ReadMode hGetLine
- dirCount path str = getDirectoryContents path
- >>= return . length
- . filter (\s -> str `isPrefixOf` s
- && isDigit (last s))
- files count = map (\i -> concat [dir, "/", pattern, show i, "/", file])
- [0 .. count - 1]
- conversion = trans . (read :: String -> Double)
-