From 8f9c5f1ecec8ee13bb0e803a1f26140bb8d8357e Mon Sep 17 00:00:00 2001
From: Nathaniel Wesley Filardo <nwf@cs.jhu.edu>
Date: Thu, 29 May 2014 02:16:07 -0400
Subject: A simple CatInt monitor

---
 readme.md                      | 10 ++++++++++
 src/Plugins/Monitors.hs        |  4 ++++
 src/Plugins/Monitors/CatInt.hs | 25 +++++++++++++++++++++++++
 xmobar.cabal                   |  2 +-
 4 files changed, 40 insertions(+), 1 deletion(-)
 create mode 100644 src/Plugins/Monitors/CatInt.hs

diff --git a/readme.md b/readme.md
index ac3f4c5..ca3a15f 100644
--- a/readme.md
+++ b/readme.md
@@ -1100,6 +1100,16 @@ more than one battery.
 
 	Run Locks
 
+### `CatInt n fn`
+
+- Reads and displays an integer from the file whose path is `fn`
+  (especially useful with files in `/sys`).
+- Aliases as `catn` (e.g. `Cat 0` as `cat0`, etc.) so you can
+  have several.
+- Example:
+
+    Run CatInt 0 "/sys/devices/platform/thinkpad_hwmon/fan1_input" [] 50
+
 ## Executing External Commands
 
 In order to execute an external command you can either write the
diff --git a/src/Plugins/Monitors.hs b/src/Plugins/Monitors.hs
index 27db417..860da71 100644
--- a/src/Plugins/Monitors.hs
+++ b/src/Plugins/Monitors.hs
@@ -35,6 +35,7 @@ import Plugins.Monitors.CoreTemp
 import Plugins.Monitors.Disk
 import Plugins.Monitors.Top
 import Plugins.Monitors.Uptime
+import Plugins.Monitors.CatInt
 #ifdef IWLIB
 import Plugins.Monitors.Wireless
 #endif
@@ -69,6 +70,7 @@ data Monitors = Weather      Station     Args Rate
               | TopProc      Args        Rate
               | TopMem       Args        Rate
               | Uptime       Args        Rate
+              | CatInt       Int FilePath Args Rate
 #ifdef IWLIB
               | Wireless Interface  Args Rate
 #endif
@@ -116,6 +118,7 @@ instance Exec Monitors where
     alias (DiskU _ _ _) = "disku"
     alias (DiskIO _ _ _) = "diskio"
     alias (Uptime _ _) = "uptime"
+    alias (CatInt n _ _ _) = "cat" ++ (show n)
 #ifdef IWLIB
     alias (Wireless i _ _) = i ++ "wi"
 #endif
@@ -151,6 +154,7 @@ instance Exec Monitors where
     start (DiskU s a r) = runM a diskUConfig (runDiskU s) r
     start (DiskIO s a r) = startDiskIO s a r
     start (Uptime a r) = runM a uptimeConfig runUptime r
+    start (CatInt _ s a r) = runM a catIntConfig (runCatInt s) r
 #ifdef IWLIB
     start (Wireless i a r) = runM (a ++ [i]) wirelessConfig runWireless r
 #endif
diff --git a/src/Plugins/Monitors/CatInt.hs b/src/Plugins/Monitors/CatInt.hs
new file mode 100644
index 0000000..3d19270
--- /dev/null
+++ b/src/Plugins/Monitors/CatInt.hs
@@ -0,0 +1,25 @@
+-----------------------------------------------------------------------------
+-- |
+-- Module      :  Plugins.Monitors.CatInt
+-- Copyright   :  (c) Nathaniel Wesley Filardo
+-- License     :  BSD-style (see LICENSE)
+--
+-- Maintainer  :  Nathaniel Wesley Filardo
+-- Stability   :  unstable
+-- Portability :  unportable
+--
+-----------------------------------------------------------------------------
+
+module Plugins.Monitors.CatInt where
+
+import Plugins.Monitors.Common
+import Plugins.Monitors.CoreCommon
+
+catIntConfig :: IO MConfig
+catIntConfig = mkMConfig "<v>" ["v"]
+
+runCatInt :: FilePath -> [String] -> Monitor String
+runCatInt p _ =
+  let failureMessage = "Cannot read: " ++ (show p)
+      fmt x = show (truncate x :: Int)
+  in  checkedDataRetrieval failureMessage [[p]] Nothing id fmt
diff --git a/xmobar.cabal b/xmobar.cabal
index 54acaa3..584b833 100644
--- a/xmobar.cabal
+++ b/xmobar.cabal
@@ -88,7 +88,7 @@ executable xmobar
       Plugins.Monitors.Swap, Plugins.Monitors.Thermal,
       Plugins.Monitors.ThermalZone, Plugins.Monitors.Top,
       Plugins.Monitors.Uptime, Plugins.Monitors.Weather,
-      Plugins.Monitors.Bright
+      Plugins.Monitors.Bright, Plugins.Monitors.CatInt
 
     ghc-prof-options:   -prof -auto-all
     ghc-options: -funbox-strict-fields -Wall -fno-warn-unused-do-bind
-- 
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