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Re: Redirect stdout from SSH


At 12:00 PM 8/6/2004, you wrote:
>OK, short overview: I am working on a program in C# that needs to run some
>commands on a remote machine and therefore I use SSH. The output will then
>be written into a textbox. In C# you can run a command like this:
>
>Process MyProcess = new Process();
>ProcessStartInfo psi = new ProcessStartInfo();
>psi.FileName = @"c:\cygwin\bin\ls";
>psi.Arguments = "-al";
>psi.UseShellExecute = false;
>psi.RedirectStandardError = true;
>psi.RedirectStandardOutput = true;
>psi.CreateNoWindow = true;
>MyProcess.StartInfo = psi;
>MyProcess.Start();
>+ textbox handling stuff.
>
>This command will run 'ls' without creating the Command Window and outputs
>the the listing of the direcotry as expected in the textbox. Now, when I
>want to invoke SSH in the same manner, setting these values:
>
>psi.FileName = @"c:\cygwin\bin\ssh";
>psi.Arguments = "-i /path/to/key user@host ls -al";
>
>then I have to explicitly set
>
>psi.RedirectStandardInput = true;
>
>or else it won't work. Although I see the command executing by observing
>some network action there is nothing returned to the textbox and CPU stays
>at 100%. There is nothing that needs to be written to stdin such as a
>passphrase or so. However, programs using SSH, such as rsync, don't need
>to set RedirectStandardInput = true to write their output to the textbox.
>I just wonder what's the difference.

That I can't say.


--
Larry Hall                              http://www.rfk.com
RFK Partners, Inc.                      (508) 893-9779 - RFK Office
838 Washington Street                   (508) 893-9889 - FAX
Holliston, MA 01746                     


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