start the mysql service and run commands

[cbarmpar]

Hi all,

I am new to Linux and Qt programming and c++.

My question is how to start a process for example the msqld server? I can do that from the command line typing :/etc/init.d/mysqld start. But how can my programm do that? I need to run this command as a super user from my program.

How can detect the status of this process before opening it? Like in command line we do :/etc/init.d/mysqld status.

I made a small code trying to start the mysql server but it doesnt work. I think because i dont run the command as a super user. How can i modify that so it can start the process?

#include "kentriko.h"
#include <iostream>
using namespace std;
kentriko::kentriko(QWidget *parent)
	: QMainWindow(parent)
{
	ui.setupUi(this);
	connect(ui.anixe, SIGNAL(clicked()) , this , SLOT(anixe()));
	connect(ui.pare, SIGNAL(clicked()) , this , SLOT(pare()));
	connect (ui.xekina,SIGNAL(clicked()),this,SLOT(xekina()));
	connect (ui.stamata,SIGNAL(clicked()),this,SLOT(stamata()));
	connect (ui.dixe,SIGNAL(clicked()),this,SLOT(dixe()));
}

void kentriko::anixe(){
	d.exec();
}

void kentriko::pare(){
	//ui.pare_1->text("ena") ; den kano sosti xrisi tis text()
	ui.pires->setText(d.get_alpha()->pliroforia);
}
void kentriko::xekina(){
	process.start("/etc/init.d/mysqld start");
}
void kentriko::dixe(){
	ui.dixe_l->setText(process.readAllStandardOutput());
}
void kentriko::stamata(){
	process.execute("/etc/init.d/mysqld stop");
	ui.dixe_l->setText(process.readAllStandardError());
}
kentriko::~kentriko()
{

}

Many thanks in advance,
Kindest regards.

[secondmouse]

1. install sudoers
2. add this line to /etc/sudoers
intended_user ALL=NOPASSWD:/etc/init.d/mysqld
3. add the above user to mysql group
4. command to run:
sudo /etc/init.d/mysqld status

(replace intended_user with the user that will run the command)

[cbarmpar]

Is there any other way without the sudo command?

Thanks

[gerard4143]

try this web site...it will explain and show you how to create a user program with super user privileges

Users and Groups - The GNU C Library

[cbarmpar]

Many thanks for that