[Haskell-cafe] Re: Execution of external command

Yitzchak Gale gale at sefer.org
Thu Dec 13 13:07:15 EST 2007

(_,h,e,_) <- runInteractiveCommand "script params"
output <- hGetContents h

where clearStderr is one of:

1. hClose e
2. hGetContents e >>= evaluate . last
3. forkIO (hGetContents e >>= evaluate . last >> return ())

all seem to work for me on Mac OS. Only 2 hangs on
Debian testing. What happens on Windows?

I ran the following command:

"for((i=0;i<10000;++i));do cat non_existant; echo aaaaaaaaaaaaaaa; done; date"

(varying the number of iterations to clog up both
pipe buffers)

Is this really such a problem?


More information about the Haskell-Cafe mailing list