QProcess' writeToStdin

Hi all,

I have and external mySQL C API program which needs to receive the data to search for in the database.

The following code displays the connection to the Qprocess and it works fine

Code:

---

void DatabaseLogin::connectAccept()
{
 
	proc = new QProcess( this );
	QLabel *label = new QLabel("tester",0);
	label->show();
 
	QDir *directoryPath = new QDir("f:/projek/Functional_units/Database_sources/files");
 
	proc->setWorkingDirectory(*directoryPath);
    // Set up the command and arguments.
    proc->addArgument( "cmd" );
    proc->addArgument( "/c" );
    proc->addArgument( "fdatabase" );
	proc->addArgument( "epr" );
 
    proc->start();
 
    connect( proc, SIGNAL(readyReadStdout()),
            this, SLOT(readFromStdout()) );
 
    if ( !proc->start() )
    {
        // error handling
        QMessageBox::critical( 0,
                tr("Fatal error"),
                tr("Could not start the program."),
                tr("Quit") );
        exit( -1 );
	}
}
 
void DatabaseLogin::readFromStdout()
{
    // Read and process the data.
    // Bear in mind that the data might be output in chunks.
    output->append( proc->readStdout() );
}

---

please note that ouput is just the verify the results obtained, so the program is called fdatabase and one of the variables are the database called epr. I can't send the field to look for using the above method because the API run differently to another program.

In the API I have scanf and thus from the QT3 I want to write to stdIn any advise/questions? When I add

Code:

---

proc->writeToStdin("1123");

---

just after the start nothing wants to work :(

Please help!
Thanks :)

Quote:

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Originally Posted by Shlainn

When I add

Code:

---

proc->writeToStdin("1123");

---

just after the start nothing wants to work :(

---

Add a newline ("\n") to the string you send.

Ok added the "\n":

Code:

---

proc->addArgument( username );
	proc->addArgument( database );
	output->append( (proc->arguments()).join(" "));
    proc->start();
 
	proc->writeToStdin("Saurabh\n");
    connect( proc, SIGNAL(readyReadStdout()),
            this, SLOT(readFromStdout()) );
 
    if ( !proc->start() )
    {

---

But still nothing. Here is the .c code:

Code:

---

int SetQuery()
{		char query[1024];
		char serialnmr[20];
		//char *serialnmr;
		//serialnmr = "Saurabh";
		printf("input");
		scanf("%s",serialnmr);
 
		printf("%s\n",serialnmr);
		sprintf(query, "SELECT * FROM users WHERE name='%s'",serialnmr);

---

The .c works in the command line but using QT3 it doesn't want to work.