[Debian]Set an auto password in code for SU in Konsole

Lenawel

Hello everybody ,

I am currently working on a project that would allow users to configure their computer's network from a graphical interface and not to modify files (/etc/network/interfaces) or using some commands with Konsole .
The application works great when i am connect in SU account .but I don't want these users have some access on this account or use sudo commands .
So i will try to put in my GUI application a Konsole who oppening and running all commands for delete and copy /etc/network/interfaces when the user click on "Ok" button .
I've already gone a bit but I'm stuck because I can only place One order. Beyond the console opens and crash immediately. i will need your help to solve this error and give me some tips to continu my project.

Thanck you i give you a part of my work.

QProcess ConsoleObtentionDroit;
QStringList arguments;
arguments <<"-e"
          <<"su";
ConsoleObtentionDroit.startDetached("konsole", arguments);
ConsoleObtentionDroit.waitForFinished();

This is works but i have this warning

Qdbusconnection session d-bus connection created before Qcoreapplication. application may misbehave

but if i make

QProcess ConsoleObtentionDroit;
QStringList arguments;
arguments <<"-e"
          <<"su"
          <<"-e"
          <<"password";
ConsoleObtentionDroit.startDetached("konsole", arguments);
ConsoleObtentionDroit.waitForFinished();

its a crash

aha_1980

Hi @Lenawel

I don't have an answer for your problem, but a suggestion how to give your program root access privileges.

The most common way is to "set user ID root" for a program, which means it gains root rights when running. As this gives your program access to everything, the capabilities were invented. Here you have fine-grained permission settings for your program.

In both cases, the user would not need to enter a password at runtime :)

SGaist

Hi,

Isn't that what NetworkManager is for with the help for example of Plasma NM ?

Lenawel

thx for your answer but i need to not install another programm i must make all the commands in the code (cant use shell or another things like that)

mrjj

@Lenawel said in [Debian]Set an auto password in code for SU in Konsole:

Qdbusconnection session d-bus connection created before Qcoreapplication.

Hi
That normally comes from using global variables.
Do you have any you use in the code shown ?
Like before main.

Lenawel

@mrjj
hi ,
No i have only 1 class and 0 variables on my main

jsulm

@Lenawel said in [Debian]Set an auto password in code for SU in Konsole:

0 variables on my main

They do not have to be in main. Any static variables anywhere in your app of a Qt type depending on QApplication instance is bad.

mrjj

@Lenawel

Hi
Ok. if we can find out why it says "before Qcoreapplication"
then all should be good.

Where do it say this exactly ?

does konsole say this or is it your app ?

Lenawel

it's when my app runing this error spawn on Qt windows debug