Re: [Haskell] Capturing output from System.system

16 Jan 2007

      Sorry Mads for multiple copies.

On 16/01/07, Mads Lindstrøm <mads_lindstroem@yahoo.dk> wrote:
...
The function System.system (:: String -> IO ExitCode) makes the OS
execute it first parameter as a command. It prints its output to
standard output and standard error.
How do I easily capture this output?
Try System.Process.runInteractiveCommand:

import System.Process
import System.IO

main = do
  (inH, outH, errH, _) <- runInteractiveCommand "wc -w"
  hPutStr inH "foo bar baz"
  ws <- hGetContents outH
  putStrLn ws

-- Prints 3

-- 
-David House, dmhouse@gmail.com