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7320 :: Executing command in hidden console

• NightRang3r (orginal) [2021-01-01T18:15:29+01:00] view original

  Hi,

  I tried using execProcess, execCmd and execShellCmd to execute a system command on windows OS, I compile my code with --app:gui ( also tried using winim FreeConsole()), whenever a command is executed a cmd prompt flashes briefly , Is there a way to avoid it ?

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• Araq (orginal) [2021-01-01T18:42:22+01:00] view original

  Well --app:gui is for your Nim application, not for the system command. If you setup stdout/stderr for the system command properly it shouldn't create a console, but it depends on the client process too. Interprocess communication often works so poorly that libraries are used instead. ;-)

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• alexeypetrushin (orginal) [2021-01-01T18:47:00+01:00] view original

  Try

  import osproc
  
  echo exec_cmd_ex("ls -ax").output
  Run

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• rockcavera (orginal) [2021-01-01T18:55:52+01:00] view original

  On Windows you can use the winim package, specifically winim/com, for this purpose.

  Exemple:

  import winim/com
  
  const cmd = "cmd.exe /c ping 127.0.0.1"
  
  comScript:
    var a = CreateObject("WScript.Shell")
    
    echo "Executing command, waiting to finish and showing the window..."
    discard call(a, "Run", toVariant(cmd), toVariant(1), toVariant(true))
    
    echo "Executing command, waiting to finish and not showing the window..."
    discard call(a, "Run", toVariant(cmd), toVariant(0), toVariant(true))
    
    echo "Executing command, without waiting to finish and showing the window..."
    discard call(a, "Run", toVariant(cmd), toVariant(1), toVariant(false))
    
    echo "Executing command, without waiting to finish and not showing the window..."
    discard call(a, "Run", toVariant(cmd), toVariant(0), toVariant(false))
  Run

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• NightRang3r (orginal) [2021-01-01T20:23:12+01:00] view original

  Thanks all, Both examples still create a console windows that flash during execution, I have a service that will run in background and every few hours need to execute a command and capture its output, but the flashing console is really annoying

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• NightRang3r (orginal) [2021-01-01T21:27:06+01:00] view original

  Ok I found the solution

  I was using:

  var output = execProcess("cmd.exe /c ipconfig")

  Which caused the console to flash when app is compiled with --app:gui

  when changed to:

  var output = execProcess("cmd.exe /c ipconfig" , options={poUsePath, poStdErrToStdOut, poEvalCommand, poDaemon})

  It solved the issue.

  Thank everyone!

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