I want to start a process as another user from a C++ program (it should be detached). But I have only the UID (user identification number I think). How can I do this?
The shell command is:
kdesu -u ME -c a command with arguments
But there I must know the user name

Thanks in advance

You could try to map the user id to the user name, but maybe there is a better approach to the overall problem.

What's your use case?

Cheers,
_

There's an idea in Brainstorm to implement a runner to kill processes (brainstorm.php#idea62623). And the API ksysguardd uses returns the uid of the process owner (or I didn't see a method to return the user name) but KDE-su needs the user name. I could read the user names out of /etc/passwd but a easier way would be better.

I mapped the user name by looking in /etc/passwd. But Pino Toscano (pino) corrected it by using KUser (which is quite easier) so this topic is solved:

Code: Select all

KUser user(uid);
    if (user.isValid()) {
        return user.loginName();
    }