* Braden Shepherdson [2009-03-12 13:01:51 -0400]:

Xie Hanjian wrote:

...

Hi,

I add PipeReader to my .xmobarrc, but the xmobar will always show the same string (which is read in when start xmobar), instead of showing strings write to the fifo pipe later. Any solutions?

Thanks, Jan

Are you certain further data is being written to the pipe? Please include your xmonad.hs so we can see your configuration.

I think so - I tried to use 'tail -f' to watch the data, and got the correct output. here is the configs related to xmobar: main = do xmobar <- spawnPipe "xmobar" xmonad $ defaultConfig { ... logHook = dynamicLogWithPP $ myPP xmobar, startupHook = myStartupHook } myPP h = defaultPP { ppCurrent = wrap "[" "]</fc>" , ppVisible = wrap "" "</fc>" , ppHidden = wrap "" "" , ppHiddenNoWindows = \_ -> "" , ppUrgent = wrap "" "</fc>" , ppSep = " " , ppLayout = \_ -> "" , ppTitle = wrap "< " " ></fc>" , ppOutput = hPutStrLn h } and my .xmobarrc: Config { font = "xft:Wenquanyi Bitmap Song:pixelsize=12" , bgColor = "black" , fgColor = "grey" , position = Top , lowerOnStart = True , commands = [ Run StdinReader , Run Network "eth0" ["-L","10","-H","100","--normal","#8ae234","--high","red","-t","<rx> <tx>"] 10 , Run Cpu ["-L","10","-H","60","--normal","#8ae234","--high","red","-t","CPU: <total> <user>u <system>s"] 10 , Run Memory ["-t","MEM: <usedratio>%"] 10 , Run Date "%a %b %_d %H:%M:%S" "date" 10 , Run Battery ["-t","[<left>]"] 600 , Run Mail [("mail", "~/.mail/pop3/work")] , Run Com "volumn.rb" [] "vol" 10 , Run PipeReader "/dev/shm/lrcfifo" "lrc" ] , sepChar = "%" , alignSep = "}{" , template = "%StdinReader% }{ %Mail%</fc> %cpu% %memory% %eth0% %battery% [%vol%] %date%" } Thanks, Jan

Braden Shepherdson shepheb

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* Norbert Zeh [2009-03-12 16:15:52 -0300]:

The problem is that the pipe reader doesn't appear anywhere in your template.

Sorry I paste the wrong version of my .xmobarrc, I do have it in my template .. Config { font = "xft:Wenquanyi Bitmap Song:pixelsize=12" ... , Run PipeReader "/dev/shm/lrcfifo" "lrc" ] , sepChar = "%" , alignSep = "}{" , template = "%StdinReader% }{ %lrc% %Mail%</fc> %cpu% %memory% %eth0|wlan0% %battery% [%vol%] %date%" } Thanks, Jan

-N

On Fri, Mar 13, 2009 at 01:15:20AM +0800, Xie Hanjian wrote:

...

* Braden Shepherdson [2009-03-12 13:01:51 -0400]:

...

Xie Hanjian wrote:

...

Hi,

I add PipeReader to my .xmobarrc, but the xmobar will always show the same string (which is read in when start xmobar), instead of showing strings write to the fifo pipe later. Any solutions?

Thanks, Jan

Are you certain further data is being written to the pipe? Please include your xmonad.hs so we can see your configuration.

I think so - I tried to use 'tail -f' to watch the data, and got the correct output.

here is the configs related to xmobar:

main = do xmobar <- spawnPipe "xmobar" xmonad $ defaultConfig { ... logHook = dynamicLogWithPP $ myPP xmobar, startupHook = myStartupHook }

myPP h = defaultPP { ppCurrent = wrap "[" "]</fc>" , ppVisible = wrap "" "</fc>" , ppHidden = wrap "" "" , ppHiddenNoWindows = \_ -> "" , ppUrgent = wrap "" "</fc>" , ppSep = " " , ppLayout = \_ -> "" , ppTitle = wrap "< " " ></fc>" , ppOutput = hPutStrLn h }

and my .xmobarrc:

Config { font = "xft:Wenquanyi Bitmap Song:pixelsize=12" , bgColor = "black" , fgColor = "grey" , position = Top , lowerOnStart = True , commands = [ Run StdinReader , Run Network "eth0" ["-L","10","-H","100","--normal","#8ae234","--high","red","-t","<rx> <tx>"] 10 , Run Cpu ["-L","10","-H","60","--normal","#8ae234","--high","red","-t","CPU: <total> <user>u <system>s"] 10 , Run Memory ["-t","MEM: <usedratio>%"] 10 , Run Date "%a %b %_d %H:%M:%S" "date" 10 , Run Battery ["-t","[<left>]"] 600 , Run Mail [("mail", "~/.mail/pop3/work")] , Run Com "volumn.rb" [] "vol" 10 , Run PipeReader "/dev/shm/lrcfifo" "lrc" ] , sepChar = "%" , alignSep = "}{" , template = "%StdinReader% }{ %Mail%</fc> %cpu% %memory% %eth0% %battery% [%vol%] %date%" }

Thanks, Jan

...

Braden Shepherdson shepheb

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...

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NORBERT ZEH Canada Research Chair Associate Professor Email: nzeh@cs.dal.ca Faculty of Computer Science Phone: (902) 494-3154 Dalhousie University Fax: (902) 492-1517

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* Norbert Zeh [2009-03-13 08:39:37 -0300]:

...

Sorry I paste the wrong version of my .xmobarrc, I do have it in my template ..

Config { font = "xft:Wenquanyi Bitmap Song:pixelsize=12" ... , Run PipeReader "/dev/shm/lrcfifo" "lrc" ] , sepChar = "%" , alignSep = "}{" , template = "%StdinReader% }{ %lrc% %Mail%</fc> %cpu% %memory% %eth0|wlan0% %battery% [%vol%] %date%" }

Hmm, it seems that xmobar's pipereader isn't broken per se, as I just tried it on a pipe here. Here are a few things you can do to get more info about the problem:

1) Check whether the pipe you list above actually produces any data, independently of xmobar. Eg, you should be able to just do "cat /dev/shm/lrcfifo" and see what is spits out.

yes I can see data in output.

2) Create a pipe somewhere with "mkfifo foo" and edit your rc file to read this pipe instead. Then fire up xmobar and in your terminal do "cat > fifo". Then start typing lines and see whether they show up in xmobar.

Interesting. This test doesn't work here. Platform dependent? (I'm using linux x86_64 and ghc 6.8.2) Thanks, Jan

Cheers, Norbert

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On 2009 Mar 13, at 10:21, Norbert Zeh wrote:

...

...

2) Create a pipe somewhere with "mkfifo foo" and edit your rc file to read this pipe instead. Then fire up xmobar and in your terminal do "cat > fifo". Then start typing lines and see whether they show up in xmobar.

Interesting. This test doesn't work here. Platform dependent?

(I'm using linux x86_64 and ghc 6.8.2)

I'm also on x86_64 but am using ghc 6.8.3, and it works here. What

This is tickling a neuron; I have a vague recollection of such a bug in 6.8.2. Try upgrading. -- brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery@kf8nh.com system administrator [openafs,heimdal,too many hats] allbery@ece.cmu.edu electrical and computer engineering, carnegie mellon university KF8NH

Finally I got it works! the cat > fifo problem fixed immediately after I upgrade to ghc 6.10.1 and recomplie xmobar. but the PipeReader still stop working after read in the first line of data. then I found this and patched the plugin: http://www.haskell.org/haskellwiki/GHC:FAQ#When_I_open_a_FIFO_.28named_pipe..... diff -rN old-xmobar/Plugins/PipeReader.hs new-xmobar/Plugins/PipeReader.hs 26c26 < h <- openFile p ReadMode --- > h <- openFile p ReadWriteMode it works perfect now. Thanks for all :) Cheers, Jan * Brandon S. Allbery KF8NH [2009-03-13 11:23:56 -0400]:

On 2009 Mar 13, at 10:21, Norbert Zeh wrote:

...

...

...

2) Create a pipe somewhere with "mkfifo foo" and edit your rc file to read this pipe instead. Then fire up xmobar and in your terminal do "cat > fifo". Then start typing lines and see whether they show up in xmobar.

Interesting. This test doesn't work here. Platform dependent?

(I'm using linux x86_64 and ghc 6.8.2)

I'm also on x86_64 but am using ghc 6.8.3, and it works here. What

This is tickling a neuron; I have a vague recollection of such a bug in 6.8.2. Try upgrading.

-- brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery@kf8nh.com system administrator [openafs,heimdal,too many hats] allbery@ece.cmu.edu electrical and computer engineering, carnegie mellon university KF8NH

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Hi Lars, Thanks for your tips, I got this: 01:19:~$ cat /dev/shm/lrcfifo|xmobar -b <stdin>: hGetLine: end of file Is this a haskell issue? Google told me haskell has problem like this when read from a pipe .. How can I fix this? Thanks, Jan * Chengqi(Lars) Song [2009-03-13 01:13:20 +0800]:

you can test your xmobar at first by:

cat | xmobar path/to/xmobar.config

-lars

On Thu, 12 Mar 2009, Xie Hanjian wrote:

...

Hi,

I add PipeReader to my .xmobarrc, but the xmobar will always show the same string (which is read in when start xmobar), instead of showing strings write to the fifo pipe later. Any solutions?

Thanks, Jan

-- jan=callcc{|jan|jan};jan.call(jan)

...

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