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, donn@drizzle.com