How to check if a program is running?

[raphaelf]

Hi everybody,

how could i check if a program is running?

I think one of following functions is what i am searching, but i have not found a example and i dont know how to check if a program is running..

Can somebody make a example for me?
QProcess::started () or QProcess::state ()

[wysota]

What program? "Current" program, arbitrary program or a program started with QProcess?

[raphaelf]

Hi,

I am starting a process:

QProcess *process = new QProcess(this);     
	QString program = "psexec.exe \\\\stchps426 -c -e -f -n 6 i:\\WinZip8.1.exe";
 	process->start(program);

QProcess *process = new QProcess(this);     
	QString program = "psexec.exe \\\\stchps426 -c -e -f -n 6 i:\\WinZip8.1.exe";
 	process->start(program);

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This exe runs between 5 seconds and one minute.

I have to wait until this exe stop to make some job

[wysota]

Rely on signals then. You'll get notified when the process is started and finished.

[raphaelf]

Hi Wysota,

thanks

i solved with QProcess::waitForFinished

[raphaelf]

oh,

this function is blocking my app

Have i another posibility to check if a exe is running?

[wysota]

Yes, read my previous post again.

[raphaelf]

I dont know how to implement..

Where can i find a example?

[lyuts]

QProcess has the following signal

void finished(int exitCode, QProcess::ExitStatus exitStatus)

void finished(int exitCode, QProcess::ExitStatus exitStatus)

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And you can connect it to your slot

connect(yourProcess, SIGNAL(finished(int, QProcess::ExitStatus)), this, SLOT(yourSlot(int, QProcess::ExitStatus)));

connect(yourProcess, SIGNAL(finished(int, QProcess::ExitStatus)), this, SLOT(yourSlot(int, QProcess::ExitStatus)));

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and then implement your slot

void yourClass::yourSlot(int exitCode, QProcess::ExitStatus exitSatus)
{
// your code
}

void yourClass::yourSlot(int exitCode, QProcess::ExitStatus exitSatus)
{
// your code
}

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[raphaelf]

hi everybody,

what is wrong:

.h:

#include "ui_mainwindow.h"
#include <QProcess>
 
 
 
class MainWindow : public QMainWindow
    {
        Q_OBJECT
 
    public:
        MainWindow();
 
 
     public slots:
        void yourSlot(int *exitCode, QProcess::ExitStatus *exitSatus);
 
 
    private:
        Ui::PushFast ui; 
    };

#include "ui_mainwindow.h"
#include <QProcess>



class MainWindow : public QMainWindow
    {
        Q_OBJECT

    public:
        MainWindow();
	
        
     public slots:
        void yourSlot(int *exitCode, QProcess::ExitStatus *exitSatus);
        

    private:
        Ui::PushFast ui; 
    };

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.cpp:

MainWindow::MainWindow()
{
	ui.setupUi(this);
	QProcess *process = new QProcess(this); 
  	connect(*process, SIGNAL(finished(int, QProcess::ExitStatus)), this, SLOT(yourSlot(int, QProcess::ExitStatus))); 
 
}
 
void MainWindow::yourSlot(int *exitCode, QProcess::ExitStatus *exitSatus)
{
	QMessageBox::information(this, "", "process finished");
}
 
void MainWindow::startpsexec()
{
	QString username = ui.username_le->text();
	QString password = ui.password_le->text();
	QString hostname = ui.hostname_le->text();
	QString software = ui.software_cb->currentText();
	QString path = ui.source_path_cb->currentText();
 
 
 
	//Installieren 	
 	//QProcess *process = new QProcess(this);    
	QString zeichen = "\"";
	QString program = "psexec.exe \\\\" + hostname + " -u " + hostname + "\\" + username + " -p " + password + " -i -c -e -f -n 6 " + zeichen + path + "\\" + software + zeichen;
	process->start(program); 
	QString information = process->readAllStandardError();
 	information.replace(0, 126, "");
 	information.replace("with error code 0.", "");
 
}

MainWindow::MainWindow()
{
	ui.setupUi(this);
	QProcess *process = new QProcess(this); 
  	connect(*process, SIGNAL(finished(int, QProcess::ExitStatus)), this, SLOT(yourSlot(int, QProcess::ExitStatus))); 
 	
}

void MainWindow::yourSlot(int *exitCode, QProcess::ExitStatus *exitSatus)
{
	QMessageBox::information(this, "", "process finished");
}

void MainWindow::startpsexec()
{
	QString username = ui.username_le->text();
	QString password = ui.password_le->text();
	QString hostname = ui.hostname_le->text();
	QString software = ui.software_cb->currentText();
	QString path = ui.source_path_cb->currentText();


	
	//Installieren 	
 	//QProcess *process = new QProcess(this);    
	QString zeichen = "\"";
	QString program = "psexec.exe \\\\" + hostname + " -u " + hostname + "\\" + username + " -p " + password + " -i -c -e -f -n 6 " + zeichen + path + "\\" + software + zeichen;
	process->start(program); 
	QString information = process->readAllStandardError();
 	information.replace(0, 126, "");
 	information.replace("with error code 0.", "");
 
}

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[jacek]

process->start(program);
QString information = process->readAllStandardError();

You have to give some time to psexec, before you read what it has written. Either connect so readyReadStandardError() signal or use waitForFinished() (note that the latter will hang your application, so it's suitable only if psexec works really fast).

[wysota]

hi everybody,

what is wrong:

public slots:
        void yourSlot(int *exitCode, QProcess::ExitStatus *exitSatus);

public slots:
        void yourSlot(int *exitCode, QProcess::ExitStatus *exitSatus);

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connect(*process, SIGNAL(finished(int, QProcess::ExitStatus)), this, SLOT(yourSlot(int, QProcess::ExitStatus)));

connect(*process, SIGNAL(finished(int, QProcess::ExitStatus)), this, SLOT(yourSlot(int, QProcess::ExitStatus)));

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Those signatures don't match.

[raphaelf]

Hi all,

thanks very much it works

[nhs_0702]

Hi all,

thanks very much it works

why my source code error?

http://www.mediafire.com/?kdryz5tyozj

#include "widgetcheckprocess.h"
#include <QMessageBox>
WidgetCheckProcess::WidgetCheckProcess(QWidget *parent, Qt::WFlags flags): QMainWindow(parent, flags)
{
	ui.setupUi(this);
	qpProcess = new QProcess;
	StartProcess("I:/SoftWare_Install/wincmp-setup.exe");
	connect(qpProcess, SIGNAL(finished(int, QProcess::ExitStatus)), this, SLOT(SlotDetectFinish(int, QProcess::ExitStatus)));
}
WidgetCheckProcess::~WidgetCheckProcess()
{
}
void WidgetCheckProcess::StartProcess(QString qsProcessPath)
{
	qpProcess->startDetached(qsProcessPath);
	qpProcess->waitForFinished();
}
void WidgetCheckProcess::SlotDetectFinish(int *exitCode, QProcess::ExitStatus *exitSatus)
{
	QMessageBox::information(this, "", "process finished");
}

#include "widgetcheckprocess.h"
#include <QMessageBox>
WidgetCheckProcess::WidgetCheckProcess(QWidget *parent, Qt::WFlags flags): QMainWindow(parent, flags)
{
	ui.setupUi(this);
	qpProcess = new QProcess;
	StartProcess("I:/SoftWare_Install/wincmp-setup.exe");
	connect(qpProcess, SIGNAL(finished(int, QProcess::ExitStatus)), this, SLOT(SlotDetectFinish(int, QProcess::ExitStatus)));
}
WidgetCheckProcess::~WidgetCheckProcess()
{
}
void WidgetCheckProcess::StartProcess(QString qsProcessPath)
{
	qpProcess->startDetached(qsProcessPath);
	qpProcess->waitForFinished();
}
void WidgetCheckProcess::SlotDetectFinish(int *exitCode, QProcess::ExitStatus *exitSatus)
{
	QMessageBox::information(this, "", "process finished");
}

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#ifndef WIDGETCHECKPROCESS_H
#define WIDGETCHECKPROCESS_H
 
#include <QtGui/QMainWindow>
#include "ui_widgetcheckprocess.h"
#include <QProcess>
class WidgetCheckProcess : public QMainWindow
{
	Q_OBJECT
public:
	QProcess *qpProcess;
	WidgetCheckProcess(QWidget *parent = 0, Qt::WFlags flags = 0);
	~WidgetCheckProcess();
	void StartProcess(QString qsProcessPath);
public slots:
		void SlotDetectFinish(int *exitCode, QProcess::ExitStatus *exitSatus);
//signals:
//		void finished(int exitCode, QProcess::ExitStatus exitStatus);
private:
	Ui::WidgetCheckProcessClass ui;
};
 
#endif // WIDGETCHECKPROCESS_H

#ifndef WIDGETCHECKPROCESS_H
#define WIDGETCHECKPROCESS_H

#include <QtGui/QMainWindow>
#include "ui_widgetcheckprocess.h"
#include <QProcess>
class WidgetCheckProcess : public QMainWindow
{
	Q_OBJECT
public:
	QProcess *qpProcess;
	WidgetCheckProcess(QWidget *parent = 0, Qt::WFlags flags = 0);
	~WidgetCheckProcess();
	void StartProcess(QString qsProcessPath);
public slots:
		void SlotDetectFinish(int *exitCode, QProcess::ExitStatus *exitSatus);
//signals:
//		void finished(int exitCode, QProcess::ExitStatus exitStatus);
private:
	Ui::WidgetCheckProcessClass ui;
};

#endif // WIDGETCHECKPROCESS_H

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#include "widgetcheckprocess.h"
#include <QtGui/QApplication>
 
int main(int argc, char *argv[])
{
	QApplication a(argc, argv);
	WidgetCheckProcess w;
	w.show();
	return a.exec();
}

#include "widgetcheckprocess.h"
#include <QtGui/QApplication>

int main(int argc, char *argv[])
{
	QApplication a(argc, argv);
	WidgetCheckProcess w;
	w.show();
	return a.exec();
}

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[wysota]

How to ask smart questions

[nhs_0702]

Hi all,

thanks very much it works

you can help me,why i use SIGNAL(finished(int, QProcess::ExitStatus) like you but cant run
http://www.mediafire.com/?kdryz5tyozj

[squidge]

Please re-read wysota's post and stop duplicating your posts.