[SOLVED] TProcess Termination

[RegNatarajan]

I'm writing a CLI application using FPC that will run in Linux.  I'm just writing it in Vim, not Lazarus.  This application runs another app using TProcess. 

What I want to know is, if my app gets terminated with a ctrl-c, can I count on the TProcess execution to be terminated, too, or do I need to code for that? 

If I do need to code for it, can someone point me to a way to catch a termination event?

[Yogi]

 
http://www.freepascal.org/docs-html/fcl/process/index.html

[RegNatarajan]

Maybe I'm missing something but I don't see anything in that link that answers my question.

[skalogryz]

I don't think that terminating the launching application will terminate any processes ran by it (using TProcess).
Thus you'd need to write additional code to catch "ctrl-c" signal and terminate all child processes manually.

 

[engkin]

To catch Ctrl+C, I believe, you need to install a handler for SIGINT using FpSignal or FpSigAction.

[RegNatarajan]

Thanks for this.  I did just that, trapped for ctrl-c in my event loop.  I found some code using the crt unit online (no link, sorry, just googled it and didn't save the link) and it works fine.  Not sure how to mark this question solved but it is.

Code: [Select]

        //Check for ctrl-c
        if KeyPressed then          //  <--- CRT function to test key press
        if ReadKey = ^C then        // read the key pressed
        begin
            TCPDumpProcess.Terminate(0);
            TCPDumpProcess.Free;
            writeln('Ctrl-C pressed.');
            exit;
        end;