Re: Using bash(cygwin) inside C# program

Re: Using bash(cygwin) inside C# program

[amir knippel]

References: <4ABA9534.9080203@gmail.com>

> Why exactly do you think you need to run stty and set the tty operating
> parameters, when the bash process is quite plainly *not* connected to a tty,
> it is connected to your C# application?

>  It's your application that is in charge of I/O - if it doesn't want echo,
> all it has to do is discard the stuff it reads from the process' stdout
> instead of displaying it, in your OutDataReceived/ErrorDataReceived handlers.

I have code that runs ssh and do some operation on the shell and i want use this code with cygwin.
further more i need operational tty for redirect/input output to /dev/ttyN.



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Re: Using bash(cygwin) inside C# program

[Dave Korn]

amir knippel wrote:

> i created a process that runs bash and redirect stdin,stout and std error
> but I canÂ’t get tty to work attached is a sample code that starts bash
> process and redirect the input/output.
> the problem is that i don't have tty device. if i try to run tty command or
> stty command i receive error response 
> tty - not a tty 
> stty - Inappropriate ioctl for device

> i need to run cygwin and disable echo with stty -echo but to do this i need
> a tty device. how can i create a cygwin bash shell with tty device and
> redirect the stdin, out and error ?

  Why exactly do you think you need to run stty and set the tty operating
parameters, when the bash process is quite plainly *not* connected to a tty,
it is connected to your C# application?

  It's your application that is in charge of I/O - if it doesn't want echo,
all it has to do is discard the stuff it reads from the process' stdout
instead of displaying it, in your OutDataReceived/ErrorDataReceived handlers.

>             bashProcess.StartInfo.EnvironmentVariables["CYGWIN"] = "tty";

  Don't do this.  Win32 native processes don't understand Cygwin's tty
emulation, which is based on pipes.

    cheers,
      DaveK

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Using bash(cygwin) inside C# program

[amir knippel]

Hey everyone,

i need to use bash shell "inside" C# program. I want to mimic user typing in
interactive mode and running cygwin commands.
i created a process that runs bash and redirect stdin,stout and std error
but I can’t get tty to work attached is a sample code that starts bash
process and redirect the input/output.
the problem is that i don't have tty device. if i try to run tty command or
stty command i receive error response 
tty - not a tty 
stty - Inappropriate ioctl for device

i think the this is caused from psi.UseShellExecute = false; 
i need to run cygwin and disable echo with stty -echo but to do this i need
a tty device. how can i create a cygwin bash shell with tty device and
redirect the stdin, out and error ?

Here is simplified code:

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading;

namespace shartCygwin
{
    class Program
    {
        private static Queue<string> ResponseQueue = null;
        private static ManualResetEvent ResponseEvent = null;

        static void Main(string[] args)
        {
            ResponseQueue = new Queue<string>();
            ResponseEvent = new ManualResetEvent(false);

            Process bashProcess = new Process();

            bashProcess.StartInfo.FileName = "C:\\cygwin\\bin\\bash.exe"; 
            bashProcess.StartInfo.Arguments = "--login -i ";  
            bashProcess.StartInfo.WorkingDirectory = "C:\\cygwin\\bin";

            bashProcess.StartInfo.EnvironmentVariables["CYGWIN"] = "tty";

            bashProcess.StartInfo.RedirectStandardError = true;
            bashProcess.StartInfo.RedirectStandardInput = true;
            bashProcess.StartInfo.RedirectStandardOutput = true;
            bashProcess.StartInfo.CreateNoWindow = true;
            bashProcess.StartInfo.UseShellExecute = false;
            bashProcess.StartInfo.ErrorDialog = false;

            bashProcess.Start();

            DataReceivedEventHandler errorEventHandler = new
DataReceivedEventHandler(ErrorDataReceived);
            DataReceivedEventHandler outEventHandler = new
DataReceivedEventHandler(OutDataReceived);
            bashProcess.OutputDataReceived += outEventHandler;
            bashProcess.ErrorDataReceived += errorEventHandler;
            bashProcess.BeginErrorReadLine();
            bashProcess.BeginOutputReadLine();

            while(true)
            {
                Thread.Sleep(1000);
            }
        }

        static void ErrorDataReceived(object sender, DataReceivedEventArgs
dataReceivedEventArgs)
        {
            try
            {
                lock (ResponseQueue)
                {
                    Console.WriteLine(dataReceivedEventArgs.Data);
                    ResponseQueue.Enqueue(dataReceivedEventArgs.Data);
                    ResponseEvent.Set();
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Data);
            }
        }

        static void OutDataReceived(object sender, DataReceivedEventArgs
dataReceivedEventArgs)
        {
            try
            {
                lock (ResponseQueue)
                {
                    Console.WriteLine(dataReceivedEventArgs.Data);
                    ResponseQueue.Enqueue(dataReceivedEventArgs.Data);
                    ResponseEvent.Set();
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Data);
            }
        }
    }
}



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