How to create a GUI that can enter root mode as well as Gparted applications

Renn

@SGaist For example, to wear kdesudo in the application? For Qt.

SGaist

I don't understand your question

Renn

@SGaist I mean, give me a sample code to get into root mode in Qt GUI.

Renn

@SGaist I do not know to implement kdesudo to the application that I created.

jsulm

kdesudo is open source, so you can get the source code and see how kdesudo is doing it

Renn

@jsulm Yes I just know it, but on this issue I can not implement into my application.

SGaist

What do you mean by that ? You can't use the code ?

Renn

@SGaist True, I can not use. Please provide one project about taking kdesudo gui.

SGaist

Why can't you use ? Or do you mean you don't know how to use it ?

Renn

@SGaist Yes, I do not know how to use it, so I want to ask the tutorial to you.

SGaist

Are you targeting KDE ? If so you can simply call Kdesudo using e.g. QProcess to execute what you need.

Renn

@SGaist Is it just like that? Instead will be looping continuously? If I use the method if else, it generates Segmentation fault.
So I want it like this. If the user was not logged in root mode, then he gave the password root and opened the application, if he has entered the root mode, then he does not need to enter a password.

Hamed.Masafi

The desktop environment is not matter. Your application should have a .desktop file. In this file (Menu entry) you can set the app how should be show on menu, or how should be executed. In this example:

[Desktop Entry]
Exec=/home/blackdal/Desktop/webdesigner
GenericName=This is my test application
Icon=exec
Name=Test App
Path=/home/blackdal
StartupNotify=true
Terminal=false
X-DBUS-StartupType=none
X-KDE-SubstituteUID=true
X-KDE-Username=root

I've created a sample file named 'My App.desktop' in the line that X-KDE-Username seted to root define that this app will be run as root user.

_hunter

@Renn said in How to create a GUI that can enter root mode as well as Gparted applications:

gparted

hi,did you solve this problem?I also meet this kind of problem,can you help me?

ambershark

@_hunter This thread is 3 years old. You would have been better off starting a new one.

That being said, the normal way for getting root to a gui application in linux is sudo -E ./yourapp. Or using something like kdesudo or gksu, etc. Very very few applications try to escalate their permissions dynamically. Linux users are used to having to launch apps like gparted with kdesu or sudo -E.

If your app requires root all the time and you don't want to have to launch with sudo or something, then install it with the sticky bit set to run as root and set it's user to root. Note: this is typically frowned on because of the security holes it opens if your app has any security issues like buffer overflows that can be used to gain a root shell.

Oh and the actual thing you were looking for is pkexec. That is how gparted launches as a different user graphically. It just uses pkexec to restart itself as root.