Re: [Haskell-cafe] Re: Running a "sub-process" which dies with the main program

2009/6/19 Aycan iRiCAN :

Cum, 2009-06-19 tarihinde 11:58 +0200 saatinde, Deniz Dogan yazdı:

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2009/6/18 Deniz Dogan :

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Hi

I couldn't come up with a better subject than this one, so anyways...

I have a small program which spawns a subprocess. However, when I hit C-c, the subprocess won't die, instead it will just keep running until it's done or until I kill it. I've looked around in System.Process for something suitable for my needs, but I can't seem to find it. Any ideas?

With a tip from a person outside of the mailing list I found System.Process.system, which essentially does exactly what I was asking for.

Hey I'm already subscribed :) You can read from "sout" and "serr" with below example. Hope that it helps.

module Main where

import System.Process  -- using process-1.0.1.1

main = do  (_, sout, serr, p) <- createProcess (proc "sleep" ["10"])                        { std_out = CreatePipe                        , std_err = CreatePipe }  r <- waitForProcess p  return ()

Thanks! But this was the approach I used before I went to System.Process.system and it did not work on my Linux machine. Looking at the source code for "system", we see that it uses "syncProcess", which has #ifdef mingw32_HOST_OS (IIRC) in which the code you gave me resides. If mingw32_HOST_OS is not defined, one has to go through quite a bit more trouble to get the same effect. This is why it bugs me a bit that syncProcess is not exported. I can't find any reason not to export it, but what do I know? -- Deniz Dogan