New monitor, ThermalZone, addressing issue 44

1 files changed, 43 insertions, 0 deletions

diff --git a/src/Plugins/Monitors/ThermalZone.hs b/src/Plugins/Monitors/ThermalZone.hs
new file mode 100644
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+++ b/src/Plugins/Monitors/ThermalZone.hs
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+------------------------------------------------------------------------------
+-- |
+-- Module       :  Plugins.Monitors.ThermalZone
+-- Copyright    :  (c) 2011 Jose Antonio Ortega Ruiz
+-- License      :  BSD3-style (see LICENSE)
+--
+-- Maintainer   :  jao@gnu.org
+-- Stability    :  unstable
+-- Portability  :  portable
+-- Created      :  Fri Feb 25, 2011 03:18
+--
+--
+-- A thermal zone plugin based on the sysfs linux interface.
+-- See http://www.mjmwired.net/kernel/Documentation/thermal/sysfs-api.txt
+--
+------------------------------------------------------------------------------
+
+module Plugins.Monitors.ThermalZone (thermalZoneConfig, runThermalZone) where
+
+import Plugins.Monitors.Common
+
+import System.Posix.Files (fileExist)
+import qualified Data.ByteString.Char8 as B
+
+-- | Default thermal configuration.
+thermalZoneConfig :: IO MConfig
+thermalZoneConfig = mkMConfig "<temp>C" ["temp"]
+
+-- | Retrieves thermal information. Argument is name of thermal
+-- directory in \/sys\/clas\/thermal. Returns the monitor string
+-- parsed according to template (either default or user specified).
+runThermalZone :: [String] -> Monitor String
+runThermalZone args = do
+    let zone = head args
+        file = "/sys/class/thermal/thermal_zone" ++ zone ++ "/temp"
+        parse = return . (read :: String -> Int) . B.unpack
+    exists <- io $ fileExist file
+    if exists
+      then do mdegrees <- io $ B.readFile file >>= parse
+              temp <- showWithColors show (mdegrees `quot` 1000)
+              parseTemplate [ temp ]
+      else return "N/A"
+