System call in Delphi/Kylix

Hi!
How to make a system call in Delphi/Kylix AND get the system responce into the application? (working under Windows and Linux)
Dragon222Asked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

mocartsCommented:
hi, Dragon
what you mean with "system call" and "system response"?
0
Dragon222Author Commented:
Well...

If I run System('ls') in my Kylix application, how do I then get te output from ls back into my application (like into some Memo component)?

(Ok I can do like this, System('ls > myfile') and then read from this temporary file, but this is ugly...)
0
GloomyFriarCommented:
You need to redirect child stdout and stderr streams.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Dragon222Author Commented:
Tanks, GloomyFriar!

But please, for a novice like me, can you write down the few lines of code that I need... without some example I'm as lost as before...
0
GloomyFriarCommented:
I have no the sample code in Delphi. If it helps below is code in C (for Windows)

   // The steps for redirecting child process's STDOUT:
   //     1. Save current STDOUT, to be restored later.
   //     2. Create anonymous pipe to be STDOUT for child process.
   //     3. Set STDOUT of the parent process to be write handle to
   //        the pipe, so it is inherited by the child process.
   //     4. Create a noninheritable duplicate of the read handle and
   //        close the inheritable read handle.
 
// Save the handle to the current STDOUT.
 
   hSaveStdout = GetStdHandle(STD_OUTPUT_HANDLE);
 
// Create a pipe for the child process's STDOUT.
 
   if (! CreatePipe(&hChildStdoutRd, &hChildStdoutWr, &saAttr, 0))
      ErrorExit("Stdout pipe creation failed\n");
 
// Set a write handle to the pipe to be STDOUT.
 
   if (! SetStdHandle(STD_OUTPUT_HANDLE, hChildStdoutWr))
      ErrorExit("Redirecting STDOUT failed");
 
// Create noninheritable read handle and close the inheritable read
// handle.

    fSuccess = DuplicateHandle(GetCurrentProcess(), hChildStdoutRd,
        GetCurrentProcess(), &hChildStdoutRdDup , 0,
        FALSE,
        DUPLICATE_SAME_ACCESS);
    if( !fSuccess )
        ErrorExit("DuplicateHandle failed");
    CloseHandle(hChildStdoutRd);

// Now create the child process.
 
   if (! CreateChildProcess((LPCTSTR)run)) /* Just a wrapper to CreateProcess */
      ErrorExit("Create process failed");
 
// After process creation, restore the saved STDIN and STDOUT.
 
   if (! SetStdHandle(STD_OUTPUT_HANDLE, hSaveStdout))
      ErrorExit("Re-redirecting Stdout failed\n");
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Delphi

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.