summaryrefslogtreecommitdiffhomepage
path: root/src/lib/Xmobar/Plugins/CommandReader.hs
diff options
context:
space:
mode:
authorjao <jao@gnu.org>2018-11-21 23:51:41 +0000
committerjao <jao@gnu.org>2018-11-21 23:51:41 +0000
commit50134d5b5c4baabdfb35c0aeb8bf53d29f009c4d (patch)
treea710ee9a8e9ea9e46951d371af29081e1c72f502 /src/lib/Xmobar/Plugins/CommandReader.hs
parent7674145b878fd315999558075edcfc5e09bdd91c (diff)
downloadxmobar-50134d5b5c4baabdfb35c0aeb8bf53d29f009c4d.tar.gz
xmobar-50134d5b5c4baabdfb35c0aeb8bf53d29f009c4d.tar.bz2
All sources moved inside src
Diffstat (limited to 'src/lib/Xmobar/Plugins/CommandReader.hs')
-rw-r--r--src/lib/Xmobar/Plugins/CommandReader.hs39
1 files changed, 39 insertions, 0 deletions
diff --git a/src/lib/Xmobar/Plugins/CommandReader.hs b/src/lib/Xmobar/Plugins/CommandReader.hs
new file mode 100644
index 0000000..80b6299
--- /dev/null
+++ b/src/lib/Xmobar/Plugins/CommandReader.hs
@@ -0,0 +1,39 @@
+-----------------------------------------------------------------------------
+-- |
+-- Module : Plugins.CommandReader
+-- Copyright : (c) John Goerzen
+-- License : BSD-style (see LICENSE)
+--
+-- Maintainer : Jose A. Ortega Ruiz <jao@gnu.org>
+-- Stability : unstable
+-- Portability : unportable
+--
+-- A plugin for reading from external commands
+-- note: stderr is lost here
+--
+-----------------------------------------------------------------------------
+
+module Xmobar.Plugins.CommandReader where
+
+import System.IO
+import Xmobar.Plugins
+import System.Process(runInteractiveCommand, getProcessExitCode)
+
+data CommandReader = CommandReader String String
+ deriving (Read, Show)
+
+instance Exec CommandReader where
+ alias (CommandReader _ a) = a
+ start (CommandReader p _) cb = do
+ (hstdin, hstdout, hstderr, ph) <- runInteractiveCommand p
+ hClose hstdin
+ hClose hstderr
+ hSetBinaryMode hstdout False
+ hSetBuffering hstdout LineBuffering
+ forever ph (hGetLineSafe hstdout >>= cb)
+ where forever ph a =
+ do a
+ ec <- getProcessExitCode ph
+ case ec of
+ Nothing -> forever ph a
+ Just _ -> cb "EXITED"