[Bug 58745] PeekNamedPipe() unsuccessful on stdin

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=58745

--- Comment #7 from Eric Pouech  ---
> Somebody is suggesting to DuplicateHandle() and set the PIPE_NOWAIT mode
> before trying a zero ReadFile().

quickly tested (on Wine & windows) for (anonymous) pipes, and as I feared,
PIPE_NOWAIT is an attribute of the pipe kernel object not of the handle...
so changing wait mode on the dup:ed handle also changes it on original handle
(but ReadFile on either handles wouldn't block)

(there are ways to get read & write attributes out of a handle, but they only
exist in ntdll and are not exposed to kernel32 nor kernelbase; so not sure
that's suitable for this context)