[Mono-list] RE: executing a tool from within c#

[Martin Dvořák]

Would it help if the StandardError output was read from another thread?

Martin

> Malte,
>
> I use something along the lines of what is below.
>
> However, I pretty sure that execute_capture_output can cause deadlocks within
> the running application.  This is due to the ordering of the lines:
>
>         string output = p.StandardError.ReadToEnd();
>         output += p.StandardOutput.ReadToEnd();
>
> The application can deadlock because it is blocked writting to its' stdout
> which is not read from until its' stderr is closed (which will never happen
> because it is blocked).
>
> Although this is a known issue I'm not sure there is a way around it and
> no-one has suggested a solution.  Anyhow, this works for the most part.
>
> Colin
>
> ---
>
> using System.Diagnostics;
> string output = p.StandardError.ReadToEnd();
>         output += p.StandardOutput.ReadToEnd();
> namespace colib {
>   public class process_t {
>     public static string execute_capture_output(string cmd_line,
>                                                 out int exit_code) {
>       using (Process p = new Process()) {
>         int i = cmd_line.IndexOf(' ');
>         if (i == -1) {
>           p.StartInfo.FileName = cmd_line;
>         } else {
>           p.StartInfo.FileName = l_t.left(cmd_line, i);
>           p.StartInfo.Arguments = l_t.right(cmd_line, -i-1);
>         }
>
>         p.StartInfo.UseShellExecute = false;
>         p.StartInfo.RedirectStandardOutput = true;
>         p.StartInfo.RedirectStandardError = true;
>         p.Start();
>         string output = p.StandardError.ReadToEnd();
>         output += p.StandardOutput.ReadToEnd();
>
>         p.WaitForExit();
>         exit_code = p.ExitCode;
>
>         return output;
>       }
>     }
>
>     public static int execute(string path) {
>       Process p = new Process();
>       int i = path.IndexOf(' ');
>       if (i == -1) {
>         log_t.info(path);
>         p.StartInfo.FileName = path;
>       } else {
>         p.StartInfo.FileName = l_t.left(path, i);
>         p.StartInfo.Arguments = l_t.right(path, -i-1);
>       }
>
>       p.StartInfo.UseShellExecute = false;
>       p.Start();
>       p.WaitForExit();
>       int exit_code = p.ExitCode;
>       p.Close();
>       return exit_code;
>     }
>   }
> }