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Question

How to run external executable within BVMS SDK scriplet?

Answer

For more details about how to execute scriplets in the BVMS SDK, please check:

• What is the SDK functionality in Bosch Video Management System and how to create a scriptlet?

Call .bat files scriplet:

Example for BVMS scriplet    

        var process = new Process()
        {
            StartInfo = new ProcessStartInfo
            {
                FileName = "cmd.exe",
                Arguments = "/C C:\\temp\\HelloWorld.bat",

                UseShellExecute = false,
                CreateNoWindow = false,
            }
        };
        process.Start();
    }

Example for a method to be used in BVMS SDK based C# application
   

public void runExternalBatFile()
    {

//this is an example path to the test bat file called HelloWorld.bat
        string fullBatPath = @"C:\scripts\cameras_OFF.bat";

        var process = new Process()
        {
            StartInfo = new ProcessStartInfo
            {
                FileName = "cmd.exe",

//$ is a short-hand for String.Format, that is part of

//C# 6
                Arguments = $"/C \"{fullBatPath}\"",
                UseShellExecute = false,
                CreateNoWindow = false,
            }
        };
        process.Start();
    }
}

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Please write here the statement/answer/explanation

External processes can be started within server scriptlets. Check details on C#  System.Diagnostics, Process Class.

System.Diagnostics.Process.Start("C:


temp


executable.exe");

Limitation to keep in mind is that when they have some UI, this is never shown and there is no user interaction possible, because they are running under the 'Local System' account. The reason is that Windows services can't start applications with UI  and this is one Windows security design rule.

 


Further explanation for the above Limitation

The CentralServer which executes ServerScripts is running as Windows service under the 'Local System' account. Windows services are prohibited from interacting with a user or the desktop.


When a ServerScript starts further processes, they will be started, but they are child processes and they derive all properties from the parent process. That includes the user context, all security attributes and limitations as well. In this case, the new created child process is prohibited from interacting with a user or the desktop.