is extracted from the original environment, and not from the
environment to be passed on to the new image.
+NOTE: In general, sharing open files between parent and child
+processes is potential bug farm, and should be avoided unless you
+really depend on this `feature' of POSIX' @fork()@ semantics. Using
+Haskell, there's the extra complication that arguments to
+@executeFile@ might come from files that are read lazily (using
+@hGetContents@, or some such.) If this is the case, then for your own
+sanity, please ensure that the arguments to @executeFile@ have been
+fully evaluated before calling @forkProcess@ (followed by
+@executeFile@.) Consider yourself warned :-)
+
A successful @executeFile@ overlays the current process image with
a new one, so it only returns on failure.
+
<tscreen><verb>
runProcess :: FilePath -- Command
-> [String] -- Arguments