Thread: I need a plumbep :P (Problems with Pipes)

Hey everyone. I have the following function that is part of my CONNECTION class:

Code:

int CONNECTION::SendCGI()
{
	RealFile = "C:\\SWS\\Webroot\\samplephp.php";

	char psBuffer[128];
	FILE * hPipe;
	string CGIInterpreter = "\"";								// Put quotes around the name of the interpreter	
	CGIInterpreter += "C:\\PHP\\php.exe";					// Interpreter
	CGIInterpreter += "\" ";							// End quote
	CGIInterpreter += RealFile;							// Add the file to be interpreted

	if ((hPipe = _popen(CGIInterpreter.c_str(), "r")) == NULL)			
	{															// Open a pipe
		Beep(80,1000);
	}
	else 
	{
	while (!feof( hPipe ))										// Loop until output finishes
	{
		if( fgets( psBuffer, 128, hPipe) )						// Get part of the output
		{	
			cout << psBuffer;	// Send it
		}
	}
	fclose(hPipe);							// Close pipe	
	}													// Return true for now
	return true;
}

The code runs as part of an NT service and is supposed to send a file to a CGI interpreter and pipe its output to be sent back to the browser.

When that code is run from the server all I get is the beep. But if I copy everything from the function and run it inside 'main()' as part of a stand alone application it runs fine and gives the expected output.

I don't use any of the variables externally (for now, I will when its working) yet it wont work when run as a service.

Theres nothing wrong with the service code or anything because I can do everything else, just not this. Does anyone have any idea why I might be having these problems?

[edit] lol damn typo in the title, now no one will read it[/edit]

From MSDN
Note If used in a Windows program, the _popen function returns an invalid file pointer that will cause the program to hang indefinitely. _popen works properly in a Console application. To create a Windows application that redirects input and output, see Creating a Child Process with Redirected Input and Output in the Platform SDK.

http://msdn.microsoft.com/library/de...c_._wpopen.asp