RE: LabVIEW SSH Tools

[Rolf K. <rol...@ci...>]

Hi Jim
=20
> I haven't done any works with pipes in Windows and did a little bit of
> research.  I found the following on MSDN:
>=20
> =
<http://msdn.microsoft.com/library/default.asp?url=3D/library/en-us/dllpr=
oc/base/creating_a_child_process_with_redirected_input_and_output.asp>

>Has anyone gotten pipes working in LabVIEW?  Would anyone more C++ =
savvy
>than myself be interested in working with me to get a generic "System =
Exec
>w/ Pipes" working?  I envision a DLL that could be called from LabVIEW =
(or
>maybe LabVIEW could call WinAPI DLLs directly) with functions for =
Spawning
>the Process (the command-line executable), Reading from, and Writing to =
a
>Pipe for communication with the running executable.

I haven't done anything with pipes yet although it isn't really =
difficult.
The article you qoute seems fairly straight forward. I think the current
System Exec most probably uses pipes for the three standard IO handles =
to
get the StdIn/Out and Err at all. What is the problem is that you do not
get the handle back but just the entire text after execution of the =
command.

I think although it might be sort of possible to go directly from =
LabVIEW
to the Win32 API, it is a much better and smarter aproach to pack =
everything
into a DLL. Instead of returning the entire StdOut/Err text at once it =
would
return the three handles which can then be used by other DLL functions =
to
read and write to/from those handles.

The code as shown in above example would almost work for that already. =
At the
moment I'm busy getting the Generic PortIO device driver working (Well =
generic
in that it supports Port IO in direct fast and indirect slow mode (the =
one the
current LabVIEW PortIO functions support) and possibly low mem access, =
not
multiplattform although I got a Linux example too, just need to adapt it =
a bit
to get it working nicely with LabVIEW.) I hope I have it ready end of =
this week
and then I'll look into the inherited pipe system exec if nobody else =
stepped
up to it until then.

Rolf Kalbermatter