Re: [xmonad] how to redirect dynamicLogXinerama output to a FIFO/named pipe?

You can use liftIO to turn an IO action into an X action: liftIO (hSetBuffering stdout LineBuffering). ~d Quoting Lara Michaels :

Hi Brandon

thank you for this. I tried changing xmonad.hs to read main =  do     xmonad $ gnomeConfig { modMask = mod4Mask                        , startupHook = hSetBuffering stdout LineBuffering                        , manageHook = manageDocks <+> myManageHook <+> manageHook defaultConfig                        , workspaces = myWorkspaces                        , normalBorderColor  = "#cccccc"                        , focusedBorderColor = "#cd8b00"                        , borderWidth = 3                        , layoutHook = showWName myLayout                        , logHook =  dynamicLogXinerama                        -- , logHook =  ewmhDesktopsLogHook <+> dynamicLogXinerama                        , handleEventHook = ewmhDesktopsEventHook                        } `additionalKeysP` myKeys

but now xmonad shows me an error message:

Couldn't match expected type 'X ()' with actual type 'IO ()' In the return type of a call of 'hsetBuffering' In the 'startupHook' field of a record In the first argument of 'addditionalKeysP', [...]

Do you know why this is happening?

thank you for any help ~l

________________________________ From: Brandon Allbery To: Lara Michaels Cc: "xmonad@haskell.org" Sent: Wednesday, June 20, 2012 3:33 AM Subject: Re: [xmonad] how to redirect dynamicLogXinerama output to a FIFO/named pipe?

On Tue, Jun 19, 2012 at 9:57 PM, Lara Michaels wrote:

but to my surprise running 'tail -f /tmp/xmonad-fifo' shows no output, while if I simply start xmonad in a terminal I can see it printing information about the workspaces being used to the terminal:

At a guess, you've just demonstrated that nobody has been using dynamicLogXinerama.  It isn't flushing its output, and I can't find anywhere where xmonad sets its stdout to unbuffered or line buffered output.  Output to a terminal is automatically line buffered, so in that case it works as expected; block buffering means it'd only get flushed to the FIFO every 4Kbytes or so.

You could try importing System.IO and adding

    hSetBuffering stdout LineBuffering

to the startupHook. -- brandon s allbery                                      allbery.b@gmail.com wandering unix systems administrator (available)     (412) 475-9364 vm/sms