On Thu, 13 Dec 2007, Duncan Coutts wrote: ... > Something simple would be to allow attaching a pipe to just the stdout > and redirecting stderr elsewhere, or connecting both stdout and stderr > to the same output pipe. runProcess allows substituting any of > stdin/stdout/stderr for other Handles and runInteractiveProcess > substitutes them all for pipes. What we need is something in between > that allows substituting some for given Handles and connecting others to > pipes.
Right. Even if there weren't this logistical problem when you divert both stdout & stderr, it's not the right thing to do, commonly enough to even make it a default, let alone the only way. Maybe half the time, it would be better for stderr to go wherever it has been going. Maybe 2/3 of the remaining half would be better served by stderr & stdout merged on the same stream (which the caller might arrange with a shell redirection in the command, "script params 2>&1".) I imagine it would be easy enough to create the pipes to use with runProcess, but don't know how portable this would be outside the UNIX / POSIX world. Donn Cave, [EMAIL PROTECTED] _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe