I am using the Process class to run an exe.
The exe is a 3rd party console application that I do not control.
I wish to know whether the process is waiting for input on the command line.
Should it make any difference, I intend to kill the application should it be waiting for input.
There are suitable events for when there is output from the program waiting to be read, but I cannot see anything similar for when the process is waiting patiently for input.
ProcessStartInfo info = new ProcessStartInfo();
info.FileName = "myapp.exe";
info.CreateNoWindow = true;
info.UseShellExecute = false;
info.RedirectStandardError = true;
info.RedirectStandardInput = true;
info.RedirectStandardOutput = true;
process.StartInfo = info;
process.OutputDataReceived += new DataReceivedEventHandler(process_OutputDataReceived);
process.ErrorDataReceived += new DataReceivedEventHandler(process_ErrorDataReceived);
process.Start();
process.BeginOutputReadLine();
process.BeginErrorReadLine();
process.WaitForExit();
How do I detect that my process is waiting for input?
Depending on what the 3rd party process is doing exactly you could try polling its threads' states:
foreach(ProcessThread thread in process.Threads)
if (thread.ThreadState == ThreadState.Wait
&& thread.WaitReason == ThreadWaitReason.UserRequest)
process.Kill();
Failing that... you can try to
process.StandardInput.Close();
after calling Start(), I conjecture that an exception will be raised in the child process if it's trying to read from standard input.