CODEWITHSUNDEEP
c#cmdconsole-application
BlueBarren
BlueBarren

Reputation: 351

Writing a cmd Command in a Console Application

I'm trying to write a C# console application that will launch runas.exe through cmd then run another application as that user. I've taken one of the suggestions listed below (and added a little bit) as it seems the most promising.

Process cmd = new Process();
ProcessStartInfo startinfo = new ProcessStartInfo("cmd.exe", @"/K C:\Windows\System32\runas.exe /noprofile /user:DOMAIN\USER'c:\windows\system32\notepad.exe\'")
{
    RedirectStandardInput = true,
    UseShellExecute = false
};
cmd.StartInfo = startinfo;
cmd.Start();
StreamWriter stdInputWriter = cmd.StandardInput;
stdInputWriter.Write("PASSWORD");
cmd.WaitForExit();

When I launch the application it asks for the password before the command itself causing there to be an error with runas.exe

enter image description here

I'm pretty sure UseShellExecute = false is causing the error but the StreamWriter doesn't work without it so I'm not sure what to do.

Upvotes: 1

Views: 4465

Answers (3)

BlueBarren
BlueBarren

Reputation: 351

I found a solution in the following post. I had to forgo most of the structure I was working with but I can now successfully run notepad as my desired user with the code listed below.

var pass = new SecureString();
pass.AppendChar('p');
pass.AppendChar('a');
pass.AppendChar('s');
pass.AppendChar('s');
pass.AppendChar('w');
pass.AppendChar('o');
pass.AppendChar('r');
pass.AppendChar('d');
var runFileAsUser = new ProcessStartInfo
{
    FileName = "notepad",
    UserName = "username",
    Domain = "domain",
    Password = pass,
    UseShellExecute = false,
    RedirectStandardOutput = true,
    RedirectStandardError = true
};
Process.Start(runFileAsUser);

Upvotes: 0

Ofiris
Ofiris

Reputation: 6151

Your process should have RedirectStandardInput = true

var p  = new Process();
var startinfo = new ProcessStartInfo("cmd.exe", @"/C C:\temp\input.bat")
{
    RedirectStandardInput = true,
    UseShellExecute = false
};
p.StartInfo = startinfo;
p.Start();
StreamWriter stdInputWriter = p.StandardInput;           
stdInputWriter.Write("y");

This program launches input.bat, and then sends the value y to it's standard input.

For completeness, input.bat example:

set /p input=text?: 
echo %input%

Upvotes: 1

Maksim Simkin
Maksim Simkin

Reputation: 9679

The /c argument runs comman line and terminates, so you could not see results (and it's a large C), see her : http://ss64.com/nt/cmd.html

Try to use "/K". I did it with your command and i see results in another window.

ProcessStartInfo startInfo = new ProcessStartInfo("cmd", "/K ping PC -t");
Process.Start(startInfo);

Upvotes: 2

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