diff options
Diffstat (limited to 'Dmenu.hs')
| -rw-r--r-- | Dmenu.hs | 18 |
1 files changed, 11 insertions, 7 deletions
@@ -21,6 +21,7 @@ module XMonadContrib.Dmenu ( import XMonad import qualified StackSet as W +import System.Exit import System.Process import System.IO import Control.Monad.State @@ -32,7 +33,9 @@ import Control.Monad.State -- %import XMonadContrib.Dmenu -runProcessWithInput :: FilePath -> [String] -> String -> IO String +-- | Returns Just output if the command succeeded, and Nothing if it didn't. +-- This corresponds to dmenu's notion of exit code 1 for a cancelled invocation. +runProcessWithInput :: FilePath -> [String] -> String -> IO (Maybe String) runProcessWithInput cmd args input = do (pin, pout, perr, ph) <- runInteractiveProcess cmd args Nothing Nothing hPutStr pin input @@ -41,16 +44,17 @@ runProcessWithInput cmd args input = do when (output==output) $ return () hClose pout hClose perr - waitForProcess ph - return output - + exitCode <- waitForProcess ph + case exitCode of + ExitSuccess -> return (Just output) + ExitFailure _ -> return Nothing + -- | Starts dmenu on the current screen. Requires this patch to dmenu: -- <http://www.jcreigh.com/dmenu/dmenu-3.2-xinerama.patch> -dmenuXinerama :: [String] -> X String +dmenuXinerama :: [String] -> X (Maybe String) dmenuXinerama opts = do curscreen <- (fromIntegral . W.screen . W.current) `liftM` gets windowset :: X Int io $ runProcessWithInput "dmenu" ["-xs", show (curscreen+1)] (unlines opts) -dmenu :: [String] -> X String +dmenu :: [String] -> X (Maybe String) dmenu opts = io $ runProcessWithInput "dmenu" [] (unlines opts) - |